Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

971.

Which of the following statements is/are correct in any machine?

I. The velocity ratio is usually greater than the mechanical advantage.
II. Efficiency work inputwork outputIII. The velocity ratio is independent of friction.

A.

I only

B.

III only

C.

I and II only

D.

I and III only

E.

II and III only

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

972.

An object of mass 5.0 cg moving with a velocity of 12ms-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

A.

12ms-1

B.

7ms-1

C.

6ms-1

D.

5ms-1

E.

4ms-1

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

973.

Which of the following is NOT a component of an a.c. generator?

A.

Armature

B.

Carbon brushes

C.

Magnet

D.

Slip ring

E.

Split rings

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

974.

Which of the following is a non-renewable energy source?

A.

Coal

B.

Hydro

C.

Ocean waves

D.

Solar

E.

Tides

View answer & explanation

Correct answer is A

Most non-renewable energy sources are fossil fuels: coal, petroleum, and natural gas

975.

The escape velocity of an object from the gravitational field of a planet

I. Increases with the mass of the object
II. Increases with the mass of the planet
III. Is smaller on the moon than on the earth. Which of the above statements is/are correct?

A.

I only

B.

II only

C.

I and II only

D.

II and III only

E.

I, II and III

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.


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