Transferring Electrical Energy Worksheet Page 4
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46Q3.
The diagram shows an experimental solar-powered bike.
A battery is connected to the solar cells.
The solar cells charge up the battery.
There is a switch on the handlebars.
When the switch is closed, the battery drives a motor attached to the front wheel.
(a)
Use words from the list to complete the following sentences. Words may be used once,
more than once, or not at all.
chemical
electrical
heat (thermal)
kinetic
light
potential
sound
(i)
The solar cells transfer ........................ energy to ........................ energy.
(ii)
When the battery is being charged up, ........................ energy is transferred
to ........................ energy.
(iii)
The motor is designed to transfer ........................ energy to ........................ energy.
(6)
(b)
(i)
You may find this equation useful when answering this part of the
question.
power (watt) W =
The cyclist stops pedalling for 10 seconds. During this time the motor transfers 1500
joules of energy. Calculate the power of the motor.
...........................................................................................................................
...........................................................................................................................
Power .................... W
(2)
Page 4 of 46
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