Physics Questions

Q:

An image formed by a concave mirror on a screen is called __________?

A) Virtual image B) Real image
C) Inverted image D) Erect image
 
Answer & Explanation Answer: B) Real image

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Q:

 Find the work done (in J) when a charge of 10 C moves across a potential difference of 2 V.

A) 20 B) 5
C) 40 D) 10
 
Answer & Explanation Answer: A) 20

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Q:

In which form is the supplied heat energy stored during change in temperature of substance?

A) Heat energy B) Kinetic energy
C) Potential energy D) Both kinetic and potential energy
 
Answer & Explanation Answer: B) Kinetic energy

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Q:

___________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.

A) First law of thermodynamics B) Hooke's Law
C) The coulomb's law D) Faraday's Law
 
Answer & Explanation Answer: A) First law of thermodynamics

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Q:

Washing machines and microwave oven are operated by _______________ embedded inside these gadgets.

A) Satellites B) Electronic Device
C) e-books D) Internet
 
Answer & Explanation Answer: B) Electronic Device

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Q:

Heat flows as a result of difference of _____.

A) Temperature B) Density
C) mass D) Volume
 
Answer & Explanation Answer: A) Temperature

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Q:

The absolute refractive index of any medium is always:

A) more than one B) 0
C) 1 D) less than one
 
Answer & Explanation Answer: A) more than one

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Q:

The value of acceleration due to gravity (g) at a distance of 2R from the surface of earth, where R is the radius of earth is ______.

A) g/3 B) g/4
C) g/9 D) g/2
 
Answer & Explanation Answer: C) g/9

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