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If n is the greatest number that will divide the three numbers 1236, 3708 and 4944 leaving the same remainder in each case. What is the product of digits of 'n'?
= HCF of 2472, 1236 and 3708
= 1236
Product of digits of n = 1 x 2 x 3 x 6 = 36
The ratio of the number of Matches played by Rohit and Kohli is 6:5. Kohli scored an average of 52 runs per match, and Rohit's average is 25% less than that. If the total runs scored by Kohli is 546 more than Rohit, what is the number of matches Kohli has played?
Average runs scored in a match by Rohit = 52(1  25/100) = 39
Given, 52*5k  39*6k = 546
=> 26k = 546
=> k = 21
Number of Matches played by Kohli = 5*21 = 105
For what value of 'k', the quadratic equation 4x^{2}  3m√2x + k = 0 (where, m>0) has equal roots? (Given: 2m^{2} + 7m  60 = 0)
For 2m^{2} + 7m  60 = 0:
2m^{2}  8m + 15m  60 = 0
m = 15/2,
Quadratic equation 4x2  3m√2x + k = 0 has equal roots, therefore,
D = 0 = (3m√2)^{2}  4 x 4 x k
For m = 4:
18 x (4)^{2} = 16 x k
k = 18
Study the following table carefully and answer the related question.
The following table represents the marks of the top four students of the class in four subjects.
Who got approximately 71.5% percentage in the class?
Total marks of Rakhi = 78 + 60 + 96 + 124 = 358
Rakhi's percentage = (358/500) x 100 = 71.6%
Total marks of Jay = 56 + 80 + 88 + 92 = 316
Jay's percentage = (316/500) x 100 = 63.2%
Total marks of Amit = 95 + 90 + 80 + 75 = 340
Amit's percentage = (340/500) x 100 = 68%
Total marks of Urvi = 70 + 70 + 120 + 105 = 365
Urvi's percentage = (365/500) x 100 = 73%
A sum of money at simple interest amounts to Rs 2240 in 2 years and to Rs 2600 in 5 years. What is the principal amount?
Interest for 3 years = Rs 2600  Rs 2240 = Rs 360
=> Interest for 2 years = 360x2/3 =Rs 240
Hence, principal = (2240  240) = Rs 2000
Number of kids in 10 families is given below. Find the median number of kids.
3, 4, 2, 1, 0, 2, 4, 0, 1 and 2
0, 0, 1, 1, 2, 2, 2, 3, 4, 4
Total terms = 10 = Even
Median = [(n/2)th term + {(n/2) + 1} th term]/2
=> [(10/2)th term + {(10/2) + 1}th term]/2
There are four persons A, B,C and D, and the ratio of the present age of A to C is 4: 3, C is 7 years younger to E who is 16 years old at present. Present age of B is 75% of the present age of D and B is 6 years older than A. What is the average present age of persons B, C and D?
Given below are the steps involved. Arrange them in the sequential order.
Let the age of A = 4A
(A) The ages of A and C are 12 years and 9 years respectively.
(B) Present age of E = (3A + 7) = 16 => A = 3
(C) Required average = (18 + 9 + 24)/3 = 17 years
(D) Present age of B = 12 + 6 = 18 years and present age of D = 18 * (100/75) = 24 years
(E) Present age of C = 4A * (3/4) = 3A
(E) Present age of C = 4A * (3/4) = 3A
(B) Present age of E = (3A + 7) = 16 => A = 3
(A) Age of A and C is 12 years and 9 years respectively
(D) Present age of B = 12 + 6 = 18 years and present age of D = 18 * (100/75) = 24 years
(C) Required average = (18 + 9 + 24)/3 = 17 years
The average age of a man and his son is 54 years. The ratio of their ages is 23:13. What will be the ratio of their ages after 6 years?
Average age is 54 years which means the sum of their ages = 108 years
i.e. 36x = 108
or x = 3
Hence their ages are 69 and 39 years respectively.
After 6 years, their ages would be 75 and 45 years
So the required ratio = 75:45 = 5:3
Out of 5 numbers, whose average is 36, the first one is one fifth of the sum of the last four. The first number is?
Given, (a+b+c+d+e)/5=36
a+b+c+d+e = 180
a = (b+c+d+e)/5
a = (180a)/5
a = 30
What value we get when: √(9^{2}  4^{3} + 3) is multiplied by √(2^{5} * 10^{1})?
= √(9^{2}  4^{3} + 3) * √(2^{5} * 10^{1})
= √(81  64 + 3) * √(32 ÷ 10)
= √20 * √3.
= √(20 * 3.2)
= √64
= 8
Following graph shows the number of questions attempted and the number of correct questions in preliminary and mains exams by 5 persons.
{[376.PNG}}
What is the ratio of the total number of noncorrect questions out of total number of questions attempted by all 5 persons in preliminary exam to the total number of noncorrect questions out of total number of questions attempted by all 5 persons in mains exam?
= (10 +5 +5 +10 +5)
= 35.
Total number of noncorrect questions out of total number of questions attempted by all 5 persons in mains exam
= (30 +15 +11 +30 +40)
= 126
Required ratio= 35/126
LCM of three numbers is 840 and their ratio is 2: 3: 5 respectively. What will be the HCF of these numbers?
According to the question:
840 = 2a x 3a x 5a
a = 28
Therefore, the numbers are (2 x 28), (3 x 28) and (5 x 28) respectively.
Hence, HCF of these numbers = 28
A discount of 30% on one article is the same as a discount of 35% on another article. The marked prices of two articles can be (in ₹.)
Further, it is given that these discounts are equal, so 0.3x = 0.35y=> x: y = 7: 6
i.e. marked price ratio is 7:6.
Now, check for all the given options.
A boat takes 4 more hours to travel 180 km upstream than to travel the same distance downstream. If the still water speed of the boat is 28 km/hr, what is the stream speed?
180/(28  r) = 4 + 180/(28 + r
45/(28  r)  45/(28 + r) = 1
90r/(784  r^{2}) =
r^{2} + 90r  784 = 0
(r  8)(r + 98) = 0
r = 8
The ratio of heights of Asif and Bharat is 3:4 and the ratio of heights of Bharat and Chatur is 6:7. If the average of their heights is 175 cm, what is the height of Asif?
Ratio of heights of Asif and Bharat = 3:4 = 9:12
Ratio of heights of Bharat and Chatur = 6:7 = 12:14
Ratio of heights of Asif, Bharat and Chatur = 9:12:14
Sum of parts of the ratio = 9 + 12 + 14 = 35
Asif's height =(9/35)*175*3 = 135 cm
A alone can do a piece of work in 20 days, B alone in 40 days and C alone in 60 days. Everyone begins to do the work together, but A leaves after 4 days and B leaves 6 days before the completion of the work. How many days did the work last?
In 4 days = 44/120
By C in last 6 days = 6/60 = 1/10
Total = 44/120 + 1/10 = 56/120
Work left = 1  56/120 = 64/120
Work done by B and C in one day = 1/40 + 1/60 = 5/120
Work left is done by B and C. Number of days it takes = (64/120)*(120/5) = 64/5
Total time = 10 + 64/5 = 22 4/5
A faulty watch gains 5 minutes every 40 minutes. After how many days will it show the correct time again?
It gains 5 minutes in 40 minutes
It gains 1 minute in 8 minutes
It gains 1 hr in 480 minutes
It gains 24 hr in 480*24 minutes or (480*24)/(60*24) or 8 days
If x/y + y/x + 1 = 0, what is the value of (x  y)^{6}/9x^{3}y^{3}?
x/y + y/x + 1 = 0
=> x^{2} + y^{2} + xy = 0
=> x^{2}  2xy + y^{2} + 3xy = 0
=> (x  y)^{2} = −3xy
=> (x  y)^{6} = −27x^{3}y^{3}
(x  y)^{6}/9x^{3}y^{3}
∴ = (−27x^{3}y^{3})/9x^{3}y^{3}
= −3
A TV costs Rs.20000 and the shopkeeper announces that the price of the TV will reduce at 10% per annum. What will be the cost price of the item after 2 years?
Overall change in the price of the TV = 1010+100/100=19%
Cost Price of the TV after two years = 20000(19/100 X 20000)=Rs.16200
In the following diagram ABCD is a square inscribed in a circle of centre O. If perimeter of the square ABCD is 40 cm, then what is the area of the blue portion?(take π = 3.14)
Diagonal AC of square = Side x √2 =10√2 cm
AC is also the diameter of a circle.
Radius of circle = 5√2 cm
Area of circle = 3.14 x (5√2)^{2} = 3.14 x 50 = 157 cm^{2}
Area of square = 100 cm2
Area of blue portion = 157100 = 57 cm^{2}.
Ramesh salary got 2 salary hikes, one of 10%, the next one of 25%. If the total increase in Ramesh salary was 24000, what is the increase in his salary from the first hike to the second Hike?
His salary after 1st Hike = (110/100)*100x = Rs 110x
His salary after 2nd Hike = (125/100)*110x = Rs 137.5x
Given 137.5x  100x = 24000
=> 37.5x = 24000
=> x = 640
increase in his salary from the first hike to the second Hike
= 137.5x  110x
= 27.5x
= Rs 17,600
Option (1):
= Product of 3rd root of 2197 and √6889
= 13 x 83
= 1079
Option (2):
= Product of 4th root of 4096 and √1377
= 8 x 9√17
= 72√17 (irrational)
Option (3):
= Product of 3rd root of 3375 and √5929
= 15 x 77
= 1155
Option (4):
= Product of 4th root of 2401 and √1444
= 7 x 38
= 266
A car wiper can clean 693 sq. inch area in its one sweep. If its length is decreased by 3.5 inch, then how much area will it clean in one sweep? (Car wiper covers a semicircle in one sweep)
Area cleaned by the car wiper in 1 sweep
= (1/2) x (22/7) x (L)^{2}
L^{2} = 693 x (7/11) = 63 x 7
L = 21 inch.
Area cleaned by car wiper in a sweep if its length decreased by 3.5 inch.
= (1/2) x (22/7) x (17.5) x (17.5)
= 481.25 sq. inch.
A bus reached Nagpur to Amravati in 2:30 hr with an average speed of 70 km/hr. If the average speed increased by 30 km/hr. How much time it will take to cover the same distance.
= (70 * 150)/60 min
= 175 km
New speed = (70 + 30) km/hr = 100 km/hr
Time = (Distance )/speed
= (175 * 60)/100
= 105 min
Two poles of equal height are on either side of a 100 m wide road. From a point on the road, the angles of elevation of their tops are 30° and 60°. Find the height of each pole.
Tan 60 = h/x
=> √3 = h/x
Or h = √3 x
Similarly,
1/√3 = h/(100x)
=> 100x = √3 h = 3x
=> x = 25
Therefore, h = 25√3 m
The sales for the month of January was 500 units. Sales increased by 50 units every month for the next 11 months. Find the average monthly sales for the year?
Average monthly sales for the year = 9300/12 = 775
Select the odd one from the following options.
a = 2.5 x 2.4  8 x 0.5
b = 12 x 4 x 0.5  16
c = 21  30 x 0.5
b = 12 x 4 x 0.5  16 = 8
c = 21  30 x 0.5 = 6
A grocer bought two types of rice A and B, at Rs.20 per kg and Rs.25 per kg. If no profit and no loss occurs on selling both the items together at Rs.24 per kg, then find the ratio of quantity of rice A and B.
Total selling price = 20a + 25b
Total cost price = 24a + 24b
No profit, no loss occurred. So,
Total selling price = total cost price
20a + 25b = 24a + 24b
4a = b
a: b = 1: 4
In an election contested by two candidates, a candidate who got 54% of the total votes won by a margin of 288 votes. Total votes are.
54% of x = 46% of x + 288
8% of x = 288
x = 288 x 100/8 = 3600. Hence, the answer option is (2).
There are two sets of figures, namely problem Figures containing five figures 1, 2, 3, 4, 5 and answer figures (a), (b), (c), (d). You have to select one Figure from the answer set, which will continue the same series as given in problem set figures.
Problem Figure
Answer Figure
DIRECTIONS: Each of the following questions consists of five figures marked A, B, C, D, and E if called the Problem figures followed by five other figures marked 1, 2, 3, and 4 called the ‘Answer figures. Select a figure from amongst the Answer Figures which will continue the same series as established by the five Problem Figures.
Problem Figure
Answer Figure
Six friends P, Q, R, S, T and U are standing around a circular park facing towards the centre. The angle made at the centre of the circle by a straight line from P and Q is 180^{o}, from Q and R is 120o, from R and S 180^{o}. T is not standing on the immediate left of R while R is not on the immediate right of P. On the basis of the above information, which of the following statements is definitely true?
In the following diagram, circle represent police officer, triangle represent corrupt, square represents writer and rectangle represents married.
The area representing unmarried police officers who are not corrupt but are writer is:
DIRECTIONS: In the question below are given a few statements followed by some conclusion. You have to take the two given statements to be true even if they seem to be at variance with the commonly known facts and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
Statements:
All lassitude is tiredness.
Some are not misled.
Only lassitude is assiduous.
Conclusions:
I. No assiduous is mislead
II. Some misleads are assiduous.
Either conclusion I or II does not follow.
DIRECTIONS: Identify the diagram that best represents the relationship among Iron, Lead, Nitrogen.
Choose the correct venn diagram.
So,
DIRECTIONS: In each of the following questions, choose the set of numbers out of the four options that is similar to the given set.
given set:(17, 35, 71)
DIRECTIONS: Study the following information to answer the given questions
In a certain code:
‘swords hidden in area’ is written as ‘white black yellow red’
‘ready swords for attack’ is written as ‘grey pink red green’
‘hidden for own safety’ is written as ‘silver grey violet white’
‘own area under attack’ is written as ‘violet blue pink black’
‘black pink yellow’ could be a code for which of the following?
swords = red
From 1 & 3
hidden = white
From 3 & 4
own = violet
From 1 & 4
area = black
From 1
in= yellow
From 2 & 3
for= grey
From 2
ready = green
From 3
safety = silver
From 4
under = blue
So, ‘black pink yellow’ is ‘Area in attack’
Find the odd figure/word/number pair from the given responses.
DIRECTIONS: Arrange the following words according to the english dictionary.
(a) Bhagat (b) Bhagwat (c) Bhagvati (d) Bhagirath (e) Bhagvant
(a) Bhagat (d) Bhagirath (e) Bhagvant (c) Bhagvati (b) Bhagwat
DIRECTIONS: Find the odd one out from the given alternatives.
DIRECTIONS: Study the given information carefully and answer the given questions.
A is the mother of B. B is the sister of C. D is the son of C. E is the brother of D. F is the mother of E. G is the granddaughter of A. H has only two children — B and C.
How is F related to H?
F is the daughter  in  law of H.
When DRIVER = 18, ACCIDENT = 24, What is the code for ZEBRA?
= 6 × 3 = 18
ACCIDENT = 8
= 8 × 3 = 24
Similarly,
ZEBRA = 5
= 5 × 3 = 15
DIRECTIONS: Select a correct alternative from the given alternatives to replace the question mark from the given figure.
DIRECTIONS: Study the following arrangement carefully and answer the questions given below:
P 1 M R E $ K 5 J # B 7 2 N 1 T 4 % 8 H U 9 Q J * V 6 W A 3 B D S
How many such symbols are there in the above arrangement, each of which is immediately preceded by a number and immediately followed by a consonant?
Which of the words in the following options can be formed using the given word ?
CORRESPONDING
There is only one ‘S’ in the given word. So, RESPONSE cannot be formed.
DIRECTIONS: From the given responses, find the missing number in the series.
YW, US, ?, MK
DIRECTIONS: A piece of paper is folded and cut as shown below in the question's figure. From the given answer figures, indicate how it will appear when opened?
In the following question, select the related letter/word/number from the given alternatives.
Hooghly : Jute :: Ahmedabad : ?
DIRECTIONS: An unfolded dice is given, from the answer figures which figure is similar when unfolded to the question figure.
DIRECTIONS: In the following question, find the missing number.
A = [(a^{2} + b^{2} + c^{2} + d^{2})  1]
So, [(2^{2} + 4^{2} + 3^{2} + 5^{2})  1] = 54  1 = 53.
How many triangles are there in the given figure?
∆ABL, ∆BCD, ∆DEF, ∆FGH, ∆HIJ, ∆JKL, ∆KCG, ∆AEI, ∆LBM, ∆BMD,
∆DMF, ∆MFH, ∆HJM, ∆JLM, ∆ADJ, ∆BEH, ∆LFI, ∆CLF, ∆KBH, ∆JDG
DIRECTIONS : Read the information carefully and answer the following questions:
‘A + B’ means ‘A is the father of B’.
‘A × B’ means ‘A is the sister of B’.
‘A $ B’ means ‘A is the wife of B’.
‘A % B’ means ‘A is the mother of B’.
‘A ÷ B’ means ‘A is the son of B’.
What should come in place of the question mark, to establish that J is the brother of T in the expression?
J ÷ P % H ? T % L
Find the missing term in the series given below.
24, 60, 120, 210, ?
So, missing term= 210 + [6 × (6 + 15)] = 210 + 126 = 336.
Swadesh Darshan scheme was launched by Union Tourism Ministry in
Which state Government has launched the One District, One Product scheme recently?
Home ministry extends ban on eight extremist groups for how many years?
Which of the following sets of Articles deals with ‘Emergency Provisions’?
Who has been appointed as the 21st Chairman of the Law Commission of India?
The first Sultan of Delhi to issue regular currency and declare Delhi as the capital of his empire was?
The first Indian selected For Indian Civil Service was:
Who was the first Indian to become a member of the British Parliament?
Who is the new Director General of IndoTibetan Border Police?
'Mohiniyattam' is a classical dance from the Indian State of
Because of one of the following factors, clouds do not precipitate in deserts ?
Rusting of iron happens when a layer of _______ forms on the surface of iron material.
iron + water + oxygen → hydrated iron(III) oxide ( hydrated ferric oxide)
Rust forms when oxygen reacts with iron in presence of water/moisture.
The iron oxide reacts with oxygen to yield red rust, Fe_{2}O_{3}.H_{2}O
Which of the following is/are the characteristics of common salt?
1. Salt is a white cubic crystal. When the salt is pure it is clear. It also appears in white, grey or brownish color depending upon the purity.
2. It is odourless but has a strong salty taste.
3. Solubility in water is different at different temperatures.
4. Hygroscopic(ability of a substance to attract and hold water molecules from the surroundings)
Which of the following is/are NOT a characteristic of a solid?
The molecules, atoms or ions in solids are closely packed, i.e., they are held together by strong forces and cannot move about at random. Hence solids have definite volume, shape, slow diffusion, low vapour pressure and possess the unique property of being rigid.
The frequency range of hearing for a normal young person is ___________ hertz.
The human ear is capable of hearing many of the sounds produced in nature. Any frequency that is below the human range is known as infrasound.
Bats, whales, porpoises, and dolphins use ultrasound for navigation. Most bats can detect frequencies as high as 100,000 Hz.
Which of these is/are example(s) of Newton's 3rd Law of Motion?
According to Newton, whenever objects A and B interact with each other, they exert forces upon each other. These forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is:
For every action, there is an equal and opposite reaction.
All the above given options are examples of the stated law.
_______are tiny organelles inside cells that are involved in releasing energy from food hence, gaining the tag, "Power house of Cell".
It is for this reason that mitochondria are often referred to as the powerhouses of the cell. Cells that need a lot of energy, like muscle cells, can contain thousands of mitochondria.
When the breakdown products from the digestion of food find their way into the cell, a series of chemical reactions occur in the cytoplasm.
This allows some of the energy locked up in these products to be released and incorporated into the universal energy supplier in cells known as ATP (adenosine triphosphate).
ATP → ADP + P + energy for bodily function.
Which of the following is/are a stage in the Nitrogen Cycle?
Processes of the Nitrogen Cycle
Nitrogen fixation is the process of converting the atmospheric nitrogen (N^{2}) into biological state nitrogen.
Nitrification is the process where the ammonium ions (NH_{4}) are converted into nitrides, first into nitrites (NO^{2}) then into nitrate (NO^{3}) which is done by the nitrogenfixing bacteria.
Assimilation refers to how plants and animals obtain nitrogen. Plant roots absorb nitrates from the soil into the roots then into the entire plant system.
Ammonification is also termed as the decaying process. It occurs when the plant or animal dies then decomposers such as fungi and bacteria decompose the tissues and transform the nitrogen back into ammonium.
Denitrification is the process that changes nitrate to nitrogen gas, hence returning it into the atmosphere. This process releases the excess nitrogen in the soil back into the atmosphere
It is the second most common halogen on Earth.
Chlorine in its pure form is yellowishgreen, but its common compounds are typically colourless.
Chlorine is vital for living organisms although highly concentrated pure chlorine is dangerous to living beings.
Chlorine has two stable isotopes, Cl35 and Cl37 while Cl36 is radioactive.
_____________ is the process of conversion of a solid directly into vapour.
An example is the vaporization of frozen carbon dioxide (dry ice) at ordinary atmospheric pressure and temperature. The phenomenon is the result of vapour pressure and temperature relationships.
Hoarfrost is formed by direct condensation of water vapour to ice at temperatures below freezing and occurs when air is brought to its frost point by cooling.
Which of the following are generally used as fuel for Nuclear reactors?
The uranium ore required to make fuel for nuclear power. Uranium is to be extracted from the rock in which it is found, then enriched in the uranium235 isotope, before being made into pellets that are loaded into assemblies of nuclear fuel rods.
The boiling point of water is _______ at 1 atmospheric pressure, that is, at sea level.
The boiling point of water depends on the purity of the water, atmospheric pressure. Water that contains impurities (such as salted water) boils at a higher temperature than pure wate.
Which of the following are properties of a sound wave?
Refraction of waves is the change in direction of waves as they pass from one medium to another.
Diffraction is the phenomenon known for the bending of a wave towards the small obstacles that spreads out as a wave fronts beyond the openings.
Pleural Membrane is associated with which organ in the Human body?
The membranes and associated fluid serve to protect the lungs and to provide lubrication. Lung tissue is delicate and easily damaged compared to muscle, bone, or connective tissue.
Protecting the lungs from damaging interactions with other tissues is important. The lungs are also constantly expanding and contracting. The pleural membranes and fluid allow the lungs to easily move within the body cavity with minimal friction from other organs.
Which of the following is responsible for the floating of the brain in the Human skull?
The cerebrospinal fluid is kept separate from the blood supply by the bloodbrain barrier.
Iron, Silver are examples of ________ of electricity whereas wood, glass are examples of _____ of electricity.
Insulators are materials that have the opposite effect on the flow of electrons. They do not let electrons flow very easily from one atom to another. These electrons are not free to roam around and be shared by neighbouring atoms.
Some common insulator materials are glass, plastic, rubber, air, and wood.
________ is softer and more flexible than bone in the human body and is a connective tissue found in many areas of the body.
Cartilage is a connective tissue found in many areas of the body including:
Joints between bones e.g. the elbows, knees and ankles
Ends of the ribs
Between the vertebrae in the spine
Ears and nose
Mass of proton: Mass of proton is 1.6726 x 10^{27} kg.
Mass of neutron: Mass of neutron is 1.6749 x 10^{27} kg.
Who is credited with the discovery of XRays in the year 1895?
Roentgen was conducting experiments with a Crookes tube  basically, a glass gas bulb that gives off a fluorescent light when a highvoltage current is passed through it  when he noticed that the beam turned a screen 9 feet away a greenish fluorescent color, despite the tube being shielded by heavy black cardboard.
The ash formed from the burning of a Magnesium ribbon is ______ in colour.
2Mg(s)+O2(g)→2MgO(s)+energy
The molecule has the typical structure of a methane, which is the most related molecule due to chloroform is a methane where 3 hydrogen atoms have been substituted by 3 chloride atoms.
The molecular structure is tetrahedral.
Nearsightedness (myopia) is a common vision condition in which you can see objects ______ to you clearly, but objects _______ are blurry.
Nearsightedness symptoms may include:
Blurry vision when looking at distant objects
The need to squint or partially close the eyelids to see clearly
Headaches caused by eyestrain
Difficulty seeing while driving a vehicle, especially at night (night myopia)
Speed of light in vacuum is approximately ______________.
When light is in a vacuum, its speed has that exact value, no matter who measures it. Even if the vacuum is inside a box in a rocket traveling away from earth, both an astronaut in the rocket and a hypothetical observer on earth will measure the speed of light moving through that box to be exactly c. No one will measure a faster speed. Indeed, c is the ultimate speed limit of the universe
____________carry blood from the tissues of the body back to the heart.
carry blood from the tissues of the body back to the heart
are usually positioned closer beneath the surface of the skin
are less muscular than arteries, but contain valves to help keep blood flowing in the right direction, usually toward the heart
Haemoglobin (Hb) is a protein found in the red blood cells that carries oxygen in your body and gives blood its red colour.
________ is the device used for detecting the presence of small current and voltage or for measuring their magnitude.
The galvanometer is mainly used in the bridges and potentiometer where they indicate the null deflection or zero current.
An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.
Ammeter is an instrument for measuring either direct or alternating electric current, in amperes.
A voltmeter is an electronic instrument used to measure potential between any two points in an electric or electronic circuit in volts.
First Law of thermodynamics is equivalent to the principle of ______________ of energy.
For example, when a pendulum swings upward, kinetic energy is converted to potential energy. When the pendulum stops briefly at the top of its swing, the kinetic energy is zero, and all the energy of the system is in potential energy. When the pendulum swings back down, the potential energy is converted back into kinetic energy. At all times, the sum of potential and kinetic energy is constant.
This version of the conservationofenergy principle, expressed in its most general form, is the first law of thermodynamics.
The de Broglie wavelength associated with an electron moving with a speed of 200 m/s is _______.
Putting the values in the formulae,
λ = h/mv; λ = 6.6 x 10^{34} / (9.1 x 10^{31} x 200)
λ ≈ 3600 nanometre
Which is the eye's outermost layer which is a clear, dome shaped surface covering the front of the eye?
It covers the pupil, iris, and anterior chamber.
The cornea's main function is to refract, or bend, light. The cornea is responsible for focusing most of the light that enters the eye.
The retina is a lightsensitive layer that lines the back of the eye. The retina contains photoreceptors that absorb light and then transmits those signals through the optic nerve to the brain.
A body initially at rest moves with a constant acceleration of 15 m/s2. At what time from the initial point will it have travelled 3 kilometres?
Since, the body was initially at rest, u= 0 m/s,
Hence, Putting the values in the equation, S = ut +1/2at^{2}
3000 = 0 + ½ (15 x t^{2})
Or, t = 20 seconds
______ is a long, muscular tube that connects the mouth to the stomach.
When we swallow our food, the walls of the oesophagus squeeze together (contract) and help to move the food down the oesophagus to the stomach.
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