THIRD TERM EXAM PHYSICS

Which letter corresponds to the amplitude?

• A

• B

• C

• D

Which diagram correctly shows rays passing through a camera lens?

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Water waves change direction when they move from shallow water to deep water.

What is the name of this effect?

• A diffraction

• B dispersion

• C reflection

• D refraction

A plane mirror is on a wall. Which is a correct description of the image formed by the mirror?

• A the right way up and smaller than the object

• B the right way up and the same size as the object

• C upside down and smaller than the object

• D upside down and the same size as the object

A woman tunes her radio to a station broadcasting on 200 m. What does the 200 m tell her about the radio wave?

• A its amplitude

• B its frequency

• C its speed

• D its wavelength

A boy is stranded on an island 500 m from the shore.

He shouts for help, but all he can hear in reply is the echo of his shout from some cliffs. Sound travels at 340 m/s through the air. What is the time interval between the boy shouting and hearing the echo?

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A student wishes to use a magnetising coil to make a permanent magnet from a piece of metal. Which metal should she use?

• A aluminium

• B copper

• C iron

• D steel

What is the frequency of this wave?

• A 3 Hertz

• B 4 Hertz

• C 5 Hertz

• D 6 Hertz

What is the speed of a wave that has a wavelength of 2m and a frequency

of 2.5Hz?

• A 2.5 m/s

• B 5 m/s

• C 4.5 m/s

• D 6 m/s

The ray diagram shows how an image is formed by a converging lens.

What is the focal length of this lens?

• A 8cm

• B 10cm

• C 18cm

• D 24cm