Transcript Document

A boy sees the lightning flash then
4s later hears the thunder. The
distance he is from the storm is
approximately
20%
20%
20%
20%
20%
1.
2.
3.
4.
5.
1360m
13.6km
136m
2720m
680m
40
This is the pattern seen when a pupil whistles a note
into a microphone connected to an oscilloscope. A
second pupil whistles a louder note of lower frequency
into the microphone. The pattern that would be seen is
2
3
4
25%
25%
4
1
25%
3
25%
2
1
2
3
4
1
1.
2.
3.
4.
40
The main energy change that takes place in
the mouthpiece of a telephone is
20%1.
20%2.
20%3.
20%4.
20%5.
Chemical to sound
Sound to chemical
Electrical to sound
Sound to electrical
Electrical to chemical
40
The main energy transfer in a
loudspeaker is
20%1.
20%2.
20%3.
20%4.
20%5.
Chemical to sound
Sound to chemical
Electrical to sound
Sound to electrical
Electrical to chemical
40
Electrical signals travel in
telephone wires at a speed of
20%1.
20%2.
20%3.
20%4.
20%5.
Less than the speed of sound
Almost equal to the speed of sound
Almost equal to the speed of light
Greater than the speed of light
Greater than the speed of radio waves
40
The diagram shows a side
view of a water wave.
The speed of the wave is:
12m
f= 4Hz
20%1.
20%2.
20%3.
20%4.
20%5.
24cm s-1
24mm s-1
24m s-1
48m s-1
48cm s-1
40
The frequency of a vibrating rod
is 10Hz. What is its period?
20%1.
20%2.
20%3.
20%4.
20%5.
10s
1s
0.1s
1ms
10ms
40
The speed of water is 4ms-1.if it has
a wavelength of 50cm, what is its
frequency?
20%1.
20%2.
20%3.
20%4.
20%5.
0.08 Hz
0.8 Hz
8 Hz
80 Hz
200 Hz
40
The part of the radio receiver that
selects the one particular
frequency is the
20%1.
20%2.
20%3.
20%4.
20%5.
Aerial
Amplifier
Decoder
Loudspeaker
Tuner
40
In a radio the amplifier is used to:
20%1.
20%2.
20%3.
20%4.
20%5.
Pick out one signal from all the signals
Make the electrical signal stronger
Change the electrical energy to sound energy
Change the sound energy to electrical energy
Supply the energy to the radio
40
Which of the following is the
source of energy in a portable
radio receiver?
20%1.
20%2.
20%3.
20%4.
20%5.
Tuner
Decoder
Amplifier
Battery
Loudspeaker
40
The diagram below shows a ray of light striking a
plane mirror.Which path shows the reflected ray?
20%
20%
20%
20%
2
3
5
4
3
5
4
2
1
2
3
4
5
1
1.
2.
3.
4.
5.
1
20%
40
The diagram shows light rays
entering and leaving a box
whose contents are hidden.
Which object is in the box?
20%
20%
20%
20%
3
5
5
4
3
4
2
1
2
3
4
5
1
1.
2.1
3.
4.
5.2
20%
40
Which of diagrams below show
the path of a ray of light through
an optical fibre?
20% 20% 20% 20% 20%
1.
2.
3.
4.
5.
40
Fibre optics have certain advantages
over ordinary copper cables.which of
the statements below is not correct
20%1.
20%2.
20%3.
20%4.
20%5.
Fibre optic cables are lighter
Fibre optic cables are cheaper
Fibre optic cables are thinner
Fibre optic cables lose more heat
Fibre optic cables corrode less
40
TV signals are sent from Britain to the
USA using a satellite link. The device
which sends the signals from Britain is
called the:
20%1.
20%2.
20%3.
20%4.
20%5.
Modulator
Decoder
Loudspeaker
Amplifier
Transmitter
40
The pictures seen on a colour
television screen are produced by
mixing the following colours of
light.
20%1.
20%2.
20%3.
20%4.
20%5.
Red yellow green
Red yellow blue
Red green blue
Green yellow blue
Green blue violet
40
The deflection plates in
a TV tube are charged
up as in the diagram.
The beam will move to
position
1
2
3
4
5
20%1.
20%2.
20%3.
20%4.
20%5.
40
The period of a satellite orbit
depends on
1.
20%2.
20%3.
20%4.
20%5.
20%
The mass of the satellite
The height above the earth
The length of an Earth day
About where on the Earth the satellite orbits
The rate at which the Earth is spinning
40
A satellite is geostationary if
20%1.
20%2.
20%3.
20%4.
20%5.
It is not moving
It stops orbiting
It orbits above the same point on the Earth
It keeps changing speed
Its period is 12 hours
40