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.

3,112.

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?

A.

8s

B.

4s

C.

2\(\sqrt{2}s\)

D.

\(\sqrt{2}s\)

Correct answer is C

T2 = \(\sqrt{\frac{L^2 \times T_1^2}{L_1}}\)

= \(\sqrt{\frac{0.8 \times 2^2}{0.4}}\)

= 2\(\sqrt{2}s\)

3,113.

The pair of physical quantities that are scalar only are ?

A.

volume and area

B.

moment and momentum

C.

length and displacement

D.

Impulse and time

Correct answer is A

This is because volume and the area have only magnitude but no direction

3,115.

When a brick is taken from the earth's surface to the moon, its mass

A.

remains constant

B.

reduces

C.

increases

D.

becomes zero

Correct answer is A

No explanation has been provided for this answer.