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.

2,107.

Borh's theory provides evidence for the

A.

structure of the atom

B.

positive charge of an electron

C.

existence of energy level in the atom

D.

positive charge on a proton

Correct answer is C

No explanation has been provided for this answer.

2,108.

Calculate the inductance of an inductor whose reactance is one ohm at 50 Hz.

A.

2.00 x 10-2H

B.

6.36 x 10-2H

C.

3.18 x 10-2H

D.

4.55 x 10-2H

Correct answer is C

No explanation has been provided for this answer.

2,109.

An inductor of inductance 10H carries a current of 0.2A. Calculate the energy stored in the inductor

A.

0.1J

B.

0.2J

C.

1.0J

D.

2.0J

Correct answer is B

No explanation has been provided for this answer.

2,110.

If a bar magnet is accidentally broken into three pieces as shown in the diagram above, the polarities of P and Q respectively are

A.

S and S

B.

N and S

C.

N and N

D.

S and N

Correct answer is B

a piece of magnet consist of north pole and south pole.