Bihar PGT Physics Mock Test - 1 - Bihar PGT/TGT/PRT MCQ

'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.

'To abstain' is to stay away from some habit or some decision. None of the other options depict the same meaning.
Thus the correct answer is option 3.
Example- The leaders abstained from voting on the particular topic.

'वाग्देवी' का सही पर्यायवाची शब्द 'केशी' नहीं है। 

केशी के पर्यायवाची शब्द हैं - पशुराज, सिंह, मृगराज, शेर, वनराज, शार्दूल, केसरी, केहरी। 

वाग्देवी के अन्य पर्यायवाची शब्द हैं - वीणापाणी, महाश्वेता, हंसवाहिनी, वागीश्वरी, सरस्वती, वागेश्वरी।

निधड़क का समास विग्रह है बिना धड़क के (निर्भय) होगा।

यह अव्ययीभाव समास का उदाहरण है। 

जिसका पहला पद अव्यय होता है और उसका अर्थ प्रधान होता है, (उसमें कोई परिवर्तन नहीं किया जा सकता) अव्ययीभाव समास कहलता है।

पश्चिमी हिंदी की बोलियाँ दिल्ली, हरियाणा, पश्चिमी उत्तर प्रदेश तथा पंजाब के कुछ भागों में बोली जाती हैं। इस उपभाषा खंड की बोलियों का विकास मध्य शौरसेनी अपभ्रंश से हुआ है। पश्चिमी हिंदी की पाँच प्रमुख बोलियाँ है- खड़ी बोली या कौरवी, हरियाणवी या बाँगरू, ब्रज, बुंदेली, और कन्नौजी।

A man walks 30 meters towards South, then turning to his right, he walks 30 meters, then turning to his left, he walks 20 meters, again turning to his left, he walks 30 meters. The figure are given below -

50 meters far is he from his starting point.

Hence, "50 meters" is the correct answer.

The logic is :

1) BEH

2) KNR

3) GJM

4) TWZ

Hence, 'KNR' is the odd letter.

The correct answer is Red.

Key Points

• Sulphuric acid is also known as the oil of vitriol.
• It is composed of sulfur, hydrogen, and oxygen element.
• The acid has a very strong acidic nature.
• It has several uses such as fertilizer manufacture, mineral processing, oil refining, and wastewater processing.
• It is also known by the name hydrogen sulfate.

Important Points

• The litmus solution is a purple dye solution.
• It is extracted from the plant called " Lichen".
• It is used as an acid-base indicator.

The correct answer is The Commission for Agricultural Costs and Prices.

• Based on the recommendations of the Commission for Agricultural Costs and Prices, the Department of Agriculture and Co-operation, Government of India, declares Minimum Support Prices (MSP) for 22 crops before their sowing seasons.

Key Points

• The CACP is an attached office of the Ministry of Agriculture and Farmers Welfare, formed in 1965.
• It is a statutory body that offers separate reports recommending prices for Kharif and Rabi seasons.

Additional Information

• Cost of farming at three levels:
  • A2: All the types of cash expenditure to create the crop like seeds, manure, chemicals, labour costs, fuel costs and irrigation costs.
  • A2+FL: It includes A2 plus an imputed value of unpaid family labour.
  • C2: Under C2, the estimated land rent and the cost of interest on the money taken for farming are added to A2 and FL.
• On 18^th November 2004, the Union government formed the National Commission on Farmers (NCF) with MS Swaminathan as its chairman.
• The main purpose of the committee was to come up with a sustainable farming system, make farm commodities cost-competitive and more profitable.

The correct answer is The Supreme Court.

Key Points 

• The Supreme Court of India is called the custodian of the Constitution in India.
• The highest court in India, the Supreme Court is considered as the guardian of the Constitution.
• The conflicts or quarrels of jurisdiction between the central government and the state governments or between the legislature and the executive are decided by the court.
• It upholds and uplifts the rule of law and also ensures and protects citizens’ rights and liberties as given in the Constitution.
• Therefore, the Supreme Court is also known as the Guardian of the Constitution.​

Additional Information 

• The Indian constitution provides for a provision of the Supreme Court under Part V (The Union) and Chapter 6 (The Union Judiciary).
• The Supreme Court of India is the highest judicial court and the final court of appeal under the Constitution of India, the highest constitutional court, with the power of judicial review.
• India is a federal state and has a single and unified judicial system with a three-tier structure, i.e. Supreme Court, High Courts, and Subordinate Courts.

The correct answer is Gamma Rays.

Key Points

• Gamma rays have the shortest wavelength and highest frequency (energy) in the electromagnetic spectrum.
• They are electromagnetic waves with wavelengths in the range of 10^-12m and frequencies around 10²⁰- 10²⁴ Hz.
• They have a high penetrating power.
• They are a result of decaying radioactive material and can also be found in outer space.
• They are used in medical applications for sterilisation of equipment and cancer treatment.

Additional Information

•  Other radiations in the Electromagnetic spectrum are:

The logic follows here is :

Sum of place values of alphabets of the given word = Given number.

MONK → M + O + N + K = 13 + 15 + 14 + 11 = 53.

Similarly,

TUTOR → T + U + T + O + R = 20 + 21 + 20 + 15 + 18 = 94.

Hence, the correct answer is "94".

The pattern followed is:

Hence, the correct answer is "K21".

The correct answer is 26th  July.

Key Points

• The day marks the victory of Indian soldiers in recapturing the mountain heights that were occupied by the Pakistani Army on July 26, 1999, known as the Kargil War.
• The Kargil Vijay Diwas is celebrated every year for three days till 26th July to commemorate India's emphatic victory against Pakistan.
• Kargil Vijay Diwas celebrations take place at the Drass War Memorial in Jammu and Kashmir.
• During the war, the Indian Army evicted Pakistani intruders and succeeded in recapturing the Tiger Hill and other posts as a part of Operation Vijay.

The sole reason is 'refraction' in a single word. Refraction of waves involves a change in the direction of waves as they pass from one medium to another. Refraction, or the bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. Water waves travel fastest when the medium is the deepest. Thus, if water waves are passing from deep water into shallow water, they will slow down. But here it is traveling from shallow water to deep water, then the waves bend in the opposite direction.

Explanation:Work done is positive when force applied and displacement are in same direction.

W=F .s =Fscosθ

in this case angle between force and displacement is zero (i.e. cosθ=1) so that work done is positive.

Consider the attached free body diagram for the given scenario.
From coulomb's law,
∣F1​∣=∣F2​∣= qQ /4πε_o​r²​
In y-direction, forces cancel, F_y​=0
In x-direction, forces add up. Also, it is directed in +ve x direction if the position of −q is along −ve x axis and in −ve x direction if the position of −q is along +ve x axis.
Hence, 
F_x​=2qQcosθ​ i /4πε_o​r²    ∀ x<0
F_x​=2qQcosθ​ i /4πε_o​r²    ∀ x≥0
But cosθ =x/r
       r= √x²+d^2​
Substituting in force equation, we get
F_x​=2qQx​ i /4πε_o​( x²+d²​)^3/2  ∀ x<0
F_x​=2qQx i /4πε_o​( x²+d^2​)^3/2  ∀ x≥0
 
Now, a=F/m​ by Newton's second law. It is positive when x is negative and negative when x is positive. This is satisfied only in option (B).
 

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

formula of flux is = BAcosθ

θ is angle between A and B

θ=30∘

ϕ=1×10⁻³wb

A=0.02 m²

angle between screen and B is 60∘

B = ϕ​/acos30 = 10^-3/ 2 x 10^-2 x cos√3/2 = 0.058T

As there is no any external force acting between the two discs so according to law of conservation of angular momentum, we get
L= Iω
So, I1ω1 + I2ω2 = (I1 + I2) ω

Explanation:

If a vector is multiplied by a scalar as in  pA^→ ,  then the magnitude of the resulting vector is equal to the product of p and the magnitude of  A^→, and its direction is the same as  A^→ if p is positive and opposite to  A^→ if p is negative.

Distributive law for scalar multiplication:

p(A^→ +B^→ )=pA^→ +pB^→ 

Velocity of efflux when the hole is at depth h, v = √(2gh).
Rate of flow of water from square hole

Rate of flow of water from circular hole

According to problem

 

Consider the surface facing upwards having points A, B, C and D in anticlockwise direction when viewing towards the surface from above. Let this be S
flux = S×B
As the flux increases, by Lenz's Law the induced current will be in the direction C B A D C, so as to oppose the increase in flux.

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

Components connected in parallel provide alternative pathways for current flow. When cells are connected in parallel, the total voltages that they provide does not change. For example, when two or more 2 V cells are connected in parallel, they still provide a total voltage of 2 V.

Let the velocity of m is v and velocity of 4m is u
Therefore, v = 4u and we know that kinetic energy is 1/2mv² so for m:
KE = ½ x m x v² = 1
And for 4m:
KE = ½ x 4m x 4² = 4
So, ratio of their kinetic energy is 1:4
Hence A

India's first artificial satellite was Aryabhata. Launched by soviet union on 19  April 1975

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.

Initial force = load x g = 2 x 10 = 20 N

∴ initial acceleration = Force/Mass =

Final force = (load + mass of the thread) x g = ( 2 + 1 ) x 10 = 30N

∴  Final acceleration = (30/8) m/s²