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2022 44 questions

Q642022 · 10 Apr 2022
The energy possessed by a body due to its change in position or shape is called
1. A.thermal energy
2. B.potential energy
3. C.kinetic energy
4. D.electric energy
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Answer: B
Q652022 · 10 Apr 2022
A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?
1. A.5 s
2. B.4 s
3. C.3 s
4. D.2 s
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Answer: D
Q732022 · 10 Apr 2022
What is the mass of a material, whose specific heat capacity is 400 J/(kg °C) for a rise in temperature from 15°C to 25°C, when heat received is 20 kJ ?
1. A.0.1 kg
2. B.1 kg
3. C.10 kg
4. D.5 kg
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Answer: D
Q742022 · 10 Apr 2022
The specific latent heat of vaporization of a substance is the quantity of heat needed to change unit mass from
1. A.liquid to vapour with a change of temperature
2. B.liquid to vapour without a change of temperature
3. C.vapour to liquid without a change of temperature
4. D.vapour to liquid with a change of temperature
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Answer: B
Q752022 · 10 Apr 2022
Evaporation from the surface of a given liquid takes place more rapidly when
1. A.the temperature is high and the surface area of the liquid is large
2. B.the temperature is low and the surface area of the liquid is large
3. C.the temperature is low and the surface area of the liquid is small
4. D.the temperature is high and the surface area of the liquid is small
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Answer: A
Q762022 · 10 Apr 2022
Which of the following statements correctly explains/explain the existence of a positive force between two electric charges? 1. Both the charges are positive. 2. Both the charges are negative. 3. Both the charges are oppositely charged. Select the correct answer using the code given below.
1. A.1 only
2. B.2 only
3. C.1 and 2 only
4. D.1, 2 and 3
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Answer: C
Q772022 · 10 Apr 2022
An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the equivalent resistance of this combination?
1. A.2 ohm
2. B.10 ohm
3. C.0.5 ohm
4. D.5 ohm
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Answer: A
Q782022 · 10 Apr 2022
The electric field lines from an isolated positively charged conducting sphere are
1. A.tangential to the conducting surface
2. B.at right angles to the conducting surface and towards the centre of the sphere
3. C.at any angle to the conducting surface
4. D.at right angles to the conducting surface and outwards from the centre of the sphere
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Answer: D
Q862022 · 10 Apr 2022
The frequency of an alternating current is 3 Hz. It implies that
1. A.there are 6 cycles/s
2. B.there are 3 cycles/s
3. C.there are 2 cycles/s
4. D.there is only 1 cycle/s
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Answer: B
Q872022 · 10 Apr 2022
Which one of the following correctly represents the SI unit of resistivity?
1. A.Ω
2. B.Ω / m
3. C.Ω cm
4. D.Ω m
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Answer: D
Q882022 · 10 Apr 2022
What is the current required to light a 60 W incandescent bulb in a domestic supply of 240 V ?
1. A.0.5 A
2. B.0.25 A
3. C.1.0 A
4. D.5.0 A
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Answer: B
Q892022 · 10 Apr 2022
The magnetic field produced by a current-carrying straight wire at a point outside the wire depends
1. A.inversely on the distance from it
2. B.directly on the distance from it
3. C.inversely at short distances and directly at large distances from it
4. D.directly on the distance (at short distances) and inversely on the distance (at long distances) from it
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Answer: A
Q902022 · 10 Apr 2022
What is the dimension of gravitational constant?
1. A. $M L^{3} T^{- 2}$
2. B. $M^{- 1} L^{3} T^{- 2}$
3. C. $M^{2} L^{- 2} T^{- 2}$
4. D. $M^{2} L^{- 1} T^{- 2}$
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Answer: B
Q912022 · 10 Apr 2022
A ball is thrown vertically upward with a speed of 40 m/s. The time taken by the ball to reach the maximum height would be approximately
1. A.2 s
2. B.3 s
3. C.4 s
4. D.5 s
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Answer: C
Q972022 · 10 Apr 2022
All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is
1. A.a downward force
2. B.a downward pressure
3. C.an upward force
4. D.an upward pressure
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Answer: C
Q982022 · 10 Apr 2022
According to Fleming's right-hand rule, if the forefinger indicates the direction of the magnetic field and the thumb shows the direction of motion of the conductor, then the stretched middle finger will predict the direction of
1. A.force acting on the conductor
2. B.electric field
3. C.induced current
4. D.current
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Answer: C
Q992022 · 10 Apr 2022
Two resistors $R_{1}$ and $R_{2}$ arranged in parallel combination in an electrical closed circuit are made of the same material and of the same thickness. If the length of $R_{2}$ is twice the length of $R_{1}$ , then the total resistance R satisfies
1. A. $3 R = 2 R_{1}$
2. B. $3 R = 2 R_{2}$
3. C. $2 R = 3 R_{1}$
4. D. $2 R = 3 R_{2}$
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Answer: A
Q1002022 · 10 Apr 2022
What is the magnification produced by a concave lens of focal length 10 cm, when an image is formed at a distance of 5 cm from the lens?
1. A.2.0
2. B.1.0
3. C.0.5
4. D.0.33
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Answer: C
Q1012022 · 10 Apr 2022
A wooden box of mass 2 kg and dimensions (30 cm × 15 cm × 10 cm) is placed on a table with sides 30 cm and 10 cm touching the tabletop. Which one of the following is the approximate pressure exerted on the table?
1. A. $111.1 N/ m^{2}$
2. B. $222.2 N/ m^{2}$
3. C. $333.3 N/ m^{2}$
4. D. $666.6 N/ m^{2}$
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Answer: D