999+ Physics Questions Answers Explanation MCQ

Q:

The combined gas law relates which of the following?

A) Volume & Temperature	B) Temperature & Pressure
C) Volume & Pressure	D) Volume, Temperature & Pressure

Answer & Explanation Answer: D) Volume, Temperature & Pressure

Explanation:

The combined gas law states that the ratio between the pressure-volume product and the temperature of a system remains constant.

Hence it depends on all the three Volume, Temperature & Pressure.

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2 2033

Q:

Force of impact is the force

A) by the objects weight	B) by the speed of the object
C) when the objects meet	D) None of the above

Answer & Explanation Answer: C) when the objects meet

Explanation:

Force of impact is the force when the objects meet. The speed of the object plays an important role in the generation of force of impact. The laws of physics determine that the force of impact increases with the square of the increase in speed.

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1 2028

Q:

Which physical quantity is measured in 'siemens'?

A) Electric potential	B) Electrical conductance
C) Magnetic flux	D) Refractive index

Answer & Explanation Answer: B) Electrical conductance

Explanation:

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3 2025

Q:

A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the bodyis: [Given g = 9.8 m/s]

A) 1568 J	B) 1568 C
C) 1568 W	D) 1568 N

Answer & Explanation Answer: A) 1568 J

Explanation:

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2 2023

Q:

In a projectile motion, a large angle with the horizontal produces ______.

A) flat trajectory	B) curve trajectory
C) straight trajectory	D) high trajectory

Answer & Explanation Answer: D) high trajectory

Explanation:

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0 2016

Q:

Rear view mirror of car is convex or concave?

A) Convex	B) Concave
C) Both A & B	D) Can't be determined

Answer & Explanation Answer: A) Convex

Explanation:

The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."

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5 2012

Q:

Which of these is exhibiting kinetic energy?

A) an archer with a flexed bow	B) a person sitting on a couch while watching TV
C) a space station orbiting Earth	D) All of the above

Answer & Explanation Answer: C) a space station orbiting Earth

Explanation:

Any moving object can exhibit kinetic energy, as kinetic energy is also known as Motional energy.

In the given options, only a space station orbiting Earth is in motion and all the other are in rest position.

Hence, option C) a space station orbiting Earth is only exhibiting kinetic energy.

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3 2012

Q:

A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

A) 150 J	B) 100 J
C) 50 J	D) 75 J

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