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1.
An example of a wind instrument is
flute.
guitar.
violin.
xylophone.
2.
Which of the following compounds of the electromagnetic spectrum has the highest frequency?
Gamma rays
Infra-red radiations
Microwave
Ultraviolet radiations
3.
During thunderstorm, lightning is seen before the sound is heard although both occur at the same time. This is because
sounds needs a material medium for propagation.
light waves are mechanical.
light travels faster than sound.
sound waves are longitudinal whereas light waves are transverse.
4.
Which energy transformation occurs in a light emitting diode?
Light energy to chemical energy
Chemical energy to heat energy
Electrical energy to heat energy
Electrical energy to light energy
5.
What is the kinetic energy of a body of mass 20 kg moving with a velocity of 4 m s-1?
80 J
160 J
320 J
5 J
6.
The rate at which energy is used is known as
work done.
power.
mechanical advantage.
velocity ratio.
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