EMRS PGT Physics Mock Test - 1 - EMRS MCQ

• The blue litmus paper will turn red when it comes into contact with an acidic solution.
• When a litmus paper is put in a solution, depending on what the solution is, the indicator will react with the solution and will change its colour.
• On the other hand, red litmus paper reacts to alkaline substances by turning blue.
• Note: Acid will turn red litmus paper to red only.No change.

The correct answer is Liver.

Key Points

• Excessive consumption of alcoholic drinks causes damage to the Liver.
  • Alcohol is readily absorbed from the digestive tract, and up to 98% is metabolised in the liver.
  • Each liver cell contains three pathways for alcohol metabolism.
  • All of these result in the production of a highly toxic metabolite which can contribute to liver cell damage.
  • With regular alcohol use, the regenerative ability of liver cells may be inhibited and lead to sustained liver damage.
  • Long term heavy alcohol use may lead to fat accumulation in the liver, which may progress to alcoholic hepatitis, or liver cirrhosis.
  • Over time, excessive alcohol use can lead to the development of chronic diseases and other serious problems including -
    • High blood pressure, heart disease, stroke, liver disease, and digestive problems. 

Additional Information

• Kidney:
  • Healthy kidneys remove wastes and extra fluid from your blood.
  • But when your kidneys fail, wastes and extra fluid can build up in your blood and make you feel sick. 
  • Kidneys can become damaged from a physical injury or a disease like diabetes, high blood pressure, or other disorders.
  • High blood pressure and diabetes are the two most common causes of kidney failure.
  • Kidney failure does not happen overnight.
• Lungs:
  • Chronic alcohol abuse and heavy drinking can greatly increase the risk of several pulmonary conditions.
    • including lung disease, alcoholic pneumonia, acute lung injury, and acute respiratory distress syndrome.
  • Smokers are more likely than nonsmokers to develop heart disease, stroke, and lung cancer.
    • Smoking can cause lung disease by damaging your airways and the small air sacs (alveoli) found in your lungs.
    • Lung diseases caused by smoking include COPD, which includes emphysema and chronic bronchitis.
• Heart:
  • Smokers are at greater risk for diseases that affect the heart and blood vessels.
  • Increases in your blood pressure can also be caused by weight gain from excessive drinking.
  • Heavy drinking weakens the heart muscle, which means the heart can't pump blood as efficiently.
    • It's is known as cardiomyopathy and can cause death, usually through heart failure.

1) Medha is sitting diagonally opposite Radha.

We can randomly place Medha on any seat and then we can place Radha opposite her.

2) Medha is on Seema’s left.

3) Raman is next to Seema and opposite Govind.

Raman must be to Seema's right as Medha is to her left.

4) Govind is on Chandra’s right.

Implies, Chandra is sitting between Govind and Radha.

5) Shanti is not on Medha’s right but is opposite to Shashi.

Implies, Shanti is to the immediate left of Medha, and Sashi is between Radha and Raman.

Hence, "Seema" is opposite Chandra.

The logic followed is:

Similarly,

Hence, the correct answer is "15".

Given:

(a + b) : (b + c) : (c + a) = 6 : 7 : 8

a + b + c = 14

Calculaiton:

(a + b) = 6k

(b + c) = 7k

(c + a) = 8k

⇒ 2(a + b + c) = 21k

⇒ 21k = 2 × 14

⇒ 21k = 28

⇒ k = 4/3

⇒ c + a = 8 × 4/3

⇒ c + a = 32/3

As given,

⇒ b + 32/3 = 14

⇒ 3b + 32 = 42

⇒ 3b = 10

∴ b = 10/3

The correct answer is Special keys​.

Key Points

• A keyboard key that moves the cursor (pointer) around the screen.
• The four arrow keys, as well as the PageUp, PageDown, Home, and End keys, are among them. Keys for navigating.
• These keys are used to navigate documents and webpages, as well as to modify text.
• The arrow keys, Home, End, Page Up, Page Down, and Insert are among them.
• To close the current open program or window, simultaneously press the Ctrl and F4 keys on the keyboard.
• Users can also simultaneously press the Alt and spacebar keys, then arrow down to the Close or Exit option in the menu and click Enter.

Important Points

• A special key, sometimes known as a media key or multimedia key, is a keyboard key that performs a function not available on a standard 104-key keyboard.
• A function key is a type of soft key that can be programmed on a computer or terminal keyboard to cause an operating system command interpreter or application software to do specified activities.

The correct answer is Type a story.

Key Points

• A word processor is a  computer program that provides for input, editing, formatting, and output of text, often with some additional features.
• Early word processors were stand-alone devices dedicated to the function, but current word processors are word processor programs running on general-purpose computers.
• The word processor is generally used to type a document like a story, article, etc.

Additional Information

• MS Paint is used to paint the picture.
• MS Excel is used to work out income and expenses.
• MS Powerpoint is used to draw a diagram and present it in slide form.
• MS Access is used to create, store a database.

The correct answer is Recycle bin.

• Recycle Bin is a location where deleted files or folders are temporarily stored in every version of Microsoft Windows since Windows 95.
• The Recycle Bin allows users to recover files that were deleted in Windows.
• In Apple computers, the Trash application is used to store deleted files like Recycle Bin.
• You can hold down the Shift when deleting a file to prevent it from going to the Recycle Bin.

Additional Information

The correct answer is Ctrl + V.

Key Points

• Shortcut commands save time because it eliminates the need of using the mouse or tracker. 
• Ctrl + V  is the shortcut key to paste content to the clipboard.

Additional Information 

• Shortcuts in MS Word-
   

The correct answer is SUBTRACT().

Key Points

SUBTRACT() is not a valid function in MS Excel

Subtract two or more numbers in a cell :

1. Click any blank cell, and then type an equal sign (=) to start the formula.

2. After the equal sign, type a few numbers that are separated by a minus sign (-).

for example, 100-50-30.

3. Press RETURN, then the result is 20.

Additional Information

SUM()

• The SUM() adds values.
• You can add individual values, cell references or ranges, or a mix of all three.
• For example: =SUM(A2:A10) Adds the values in cells A2:10.

• COUNTA - It will allow you to evaluate any gaps the dataset might have without having to reorganize the data.

COUNT()

• The COUNT() is generally used to count a range of cells containing numbers or dates excluding blanks

COUNTA()

COUNTA() will count everything as numbers, dates, text, or a range containing a mixture of these items, but does not count blank cells. COUNTA stands for the count all.

The instructions of a teacher must be based on the child's abilities, aptitude and interest. His ability to grasp and apply things, his natural ability to justify learning and his interest to learn a particular thing could decide the teaching strategies, as the education these days has become more child-centered. The teacher must be aware of the child's abilities, aptitude, and interest, which is possible only through proper evaluation.

Gamma rays are electromagnetic radiation (high-energy photons) with an extreme frequency and a high energy. They are created by the decay of nuclei as they travel from a high-energy state to a lower state; this process is called “gamma decay.” Most atomic responses are accompanied by gamma emission.

Explanation:explanation none

► Electric field (E) = 26i - k
► A = 20k
Electric flux = electric field.area
= E.A
= (26i - k)*(20k)
= (26*0 -1)*20
= -20 units

In an inductor, current lags behind the input voltage by a phase difference of π/2.
Current and voltage are in the same phase in the resistor whereas current leads the voltage by π/2 in a capacitor.
So, the circuit must contain an inductor only.

From the conservation of energy, potential energy at height h = kinetic energy at the ground.
Therefore, at height h, PE of ball A, PE = m_Agh

Voltage is induced due to change in the magnetic flux through a closed loop.
Here 
Magnetic Flux = ϕ=BA=const.
Hence
Induced EMF = dtdϕ​=0
Induced current =i=E/R=0

We know that Gravitational force = 

and,

The SI unit of the universal gravitational constant is N m²/kg²
The SI unit of the acceleration due to gravity is the same as that of acceleration.
Hence, the SI unit of the acceleration due to gravity is m/s².
So, the SI unit of 

Kilogram represent unit of physical quantity and not the physical quantity.

Area under F-t curve = change in momentum.

Until and unless the velocity of any object comes to zero, any peek in its displacement-time graph can’t be achieved. Which means for the height to be maximised the velocity must become zero. And any time of this motion the acceleration is always a constant downward due to gravity.

Diamagnetic materials are those which when placed in a magnetizing field are feebly magnetized in a direction opposite to that of the magnetizing field. Therefore, it is feebly repelled by a magnet. Example: zinc, gold, etc.

Explanation:

The theory for ideal gases makes the following assumptions

1. Gases consist of particles in constant, random motion. They continue in a straight line until they collide with something—usually each other or the walls of their container.

2. Particles are point masses with no volume. The particles are so small compared to the space between them, that we do not consider their size in ideal gases.

3. No molecular forces are at work. This means that there is no attraction or repulsion between the particles.

4. Gas pressure is due to the molecules colliding with the walls of the container. All of these collisions are perfectly elastic, meaning that there is no change in energy of either the particles or the wall upon collision. No energy is lost or gained from collisions.

5. The time it takes to collide is negligible compared with the time between collisions.

6. The kinetic energy of a gas is a measure of its Kelvin temperature. Individual gas molecules have different speeds, but the temperature and kinetic energy of the gas refer to the average of these speeds.

7. The average kinetic energy of a gas particle is directly proportional to the temperature. An increase in temperature increases the speed in which the gas molecules move.

8. All gases at a given temperature have the same average kinetic energy.

9. Lighter gas molecules move faster than heavier molecules.

Frictional forces act over the common surfaces of the two bodies to avoid and restrict relative moment between those two surfaces.

Since the current flowing through a series resonance circuit is the product of voltage divided by impedance, at resonance the impedance, Z is at its minimum value, ( =R ). Therefore, the circuit current at this frequency will be at its maximum value of V/R

'Working against the clock' means to do it as fast as possible and try to finish it before a certain time.
Option 4 is hence the correct option.
Example- The students worked against the clock to get their final presentation ready before the committee.

सही उत्तर है - ‘व्यष्टि’।

• समष्टि का विलोम व्यष्टि होगा।
• समष्टि का अर्थ : सामूहिकता।
• व्यष्टि का अर्थ : समष्टि का सदस्य या व्यक्ति।

Key Pointsअन्य विकल्प:

• अस्ति का विलोम : नास्ति।
• विशिष्ट का विलोम : साधारण।
• अशिष्ट का विलोम : शिष्ट।

Additional Information

• किसी शब्द का विलोम शब्द उस शब्द के अर्थ से उल्टा या विपरीत अर्थ वाला होता है।

विलोम शब्द के उदाहरण:-

• कृतज्ञ - कृतघ्न
• तुच्छ - महान्
• प्रगतिशील - प्रतिगामी
• देव - दानव

सही उत्तर 'धनात्मक' है।

• दिए गए विकल्पों में, 'ॠणात्मक' शब्द का विलोम शब्द 'धनात्मक' है।
• ॠणात्मक का अर्थ: नकारात्मक, अभावात्मक।
• धनात्मक का अर्थ: सकारात्मक।

Key Points

अन्य विकल्पों का विश्लेषण:

Additional Information

• विलोमार्थक शब्द/ विलोम: 'विलोम’ शब्द का अर्थ है- उल्टा या विपरीत।
• समान परिस्थितियों में एक दूसरे का विपरीत अर्थ देने वाले शब्द एक-दूसरे के विलोमार्थक शब्द होते हैं।

सही उत्तर 'शाश्वत' है।

• दिए गए विकल्पों में से, 'क्षणिक' शब्द का विलोम शब्द 'शाश्वत' है।
• क्षणिक का अर्थ:अस्थायी
• शाश्वत का अर्थ: सदा रहने वाला।

Key Points

अन्य विकल्पों का विश्लेषण:

आंगिक का अर्थ: अंग चेष्टा या संकेत द्वारा अभिव्यक्त होने वाला।

Additional Information

• विलोमार्थक शब्द/ विलोम: 'विलोम’ शब्द का अर्थ है- उल्टा या विपरीत।
• अत: किसी शब्द का उल्टा अर्थ व्यक्त करने वाला शब्द विलोमार्थक शब्द कहलाता है।
• विलोमार्थक शब्दों को विपर्यायवाची, प्रतिलोमार्थक और विलोम शब्द भी कहते हैं।
• कुछ महत्वपूर्ण विलोम शब्द:-

'उत्थान' का विलोम शब्द पतन है।

उत्थान का विलोम पतन होता है।

• उत्थान का अर्थ - उठना
• पतन का अर्थ - गिरना

Key Pointsअन्य विकल्प -

• पातन का अर्थ होता है - नीचे ढकेलने की क्रिया या भाव
• पाटन का अर्थ होता है - छेदने की क्रिया
• पतान का कुछ अर्थ नहीं होता है।

Additional Informationविलोम के उदाहरण -

• मूक - वाचाल
• सम्पन्न - विपन्न
• सम्मुख - विमुख
• मितव्ययी - अपव्ययी
• स्मरण - विस्मरण
• नीरस - सरस
• पक्ष - प्रतिपक्ष
• ज्योति - तम
• अथ - इति