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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.

1,836.

The distance between the successive crests of a wave travelling at 20ms-1 is 25cm. Calculate the frequency of the wave

A.

0.8Hz

B.

5.0Hz

C.

50.0Hz

D.

80.0hz

Correct answer is D

f = vπ=200.25=80Hz

1,837.

Which of the following observations cannot be explained using the rectilinear propagation of light?

A.

production of images by a pinhole camera

B.

production of real images of objects by lenses

C.

formation of an annular eclipse

D.

diffraction patterns of light

Correct answer is B

No explanation has been provided for this answer.

1,838.

The eclipse of the moon occurs when the

A.

moon comes exactly between the earth and the sun

B.

earth comes exactly between the moon and the sun

C.

sun comes exactly between the earth and the moon

D.

moon reflects all the rays from the sun onto the earth

Correct answer is B

No explanation has been provided for this answer.

1,839.

A note of frequency 2000Hz has a velocity of 400 ms-1. calculate the wavelength of the note

A.

5.0m

B.

2.0m

C.

0.5m

D.

0.2m

Correct answer is D

π=vf=4002000=0.2m

1,840.

The S.I units of frequency, period and amplitude of a wave are respectively

A.

hertz, second and centimeter

B.

second, metre and hertz

C.

metre, hertz and seconds

D.

hertz, second and metre

Correct answer is D

No explanation has been provided for this answer.