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.

1,342.

For the wave motion represented above

The wavelength is given by

A.

p

B.

q

C.

r

D.

s

E.

t

Correct answer is D

No explanation has been provided for this answer.

1,343.

Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet.
Which of the following statements is correct?

A.

The wire will experience a force in the direction into the paper

B.

The wire will experience a force in the direction out of the paper

C.

The wire will vibrate in a direction into and out of the paper

D.

the wire will move in the direction of the field i.e toward the s-pole

E.

the wire will not move because it is made of copper which is non magnetic

Correct answer is B

No explanation has been provided for this answer.

1,345.

In a resonance tube experiment, which is illustrated above, the velocity of sound in air is 327.68m/s, the frequency of the turning fork used is therefore?

A.

128HZ

B.

256HZ

C.

512HZ

D.

768HZ

E.

1024HZ

Correct answer is C

for close pipes, the frequency is given as F=nv/4l while for opened pipes it is f=nv/2l

the number of harmonics,n is 1. Which is the fundamental note.

f=1 X 327.68 /4 X 0.16

f=327.68/0.64

f=512HZ