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Energy Transfers 01
When a cyclist brakes thermal (heat) energy is produced by friction.

Energy Transfers 01

Revise what you know about kinetic energy. Where would you find some chemical energy?

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1 .
Which is the MAIN energy transfer when a wind-up clockwork toy is released?
Elastic → kinetic
Elastic → potential
Kinetic → elastic
Kinetic → sound
The spring unwinds because of the stored elastic potential energy it contains. As the spring does this, its movement can be used to make the toy do things
2 .
Which is the MAIN energy transfer when using a microphone?
Electrical → sound
Electrical → thermal
Sound → electrical
Sound → thermal
A microphone converts sound into an electrical signal. This can then be saved to a computer file or amplified and sent through a loudspeaker system so that it can be heard further away
3 .
Which is the MAIN energy transfer when a ball rolls UP a ramp?
Kinetic → potential
Kinetic → thermal
Potential → kinetic
Potential → sound
As the ball rolls upwards, it gains potential energy but the movement gradually slows down as the kinetic energy is transferred
4 .
Which is the MAIN energy transfer when you drop a ball?
Kinetic → potential
Kinetic → sound
Potential → kinetic
Potential → thermal
The ball has potential (stored) energy due to gravity
5 .
Which is the MAIN energy transfer in a solar cell on a calculator?
Electrial → light
Light → electrical
Light → kinetic
Light → thermal
Solar cells can be used on a much larger scale to generate electricity
6 .
Which is the MAIN energy transfer taking place when a gas fire burns?
Chemical → sound
Chemical → thermal
Thermal → chemical
Thermal → light
The energy stored in gas is chemical, light is also produced but is not the main product
7 .
Which is the MAIN energy transfer taking place when a candle burns?
Chemical → light
Chemical → sound
Light → chemical
Thermal → chemical
Thermal (heat) energy is also produced
8 .
Which is the MAIN energy transfer in a loudspeaker?
Electrical → sound
Electrical → thermal
Sound → electrical
Sound → thermal
The electrical signals vibrate a cone in the loudspeaker to produce sound waves
9 .
Which is the MAIN energy transfer when a cyclist brakes to stop?
Kinetic → elastic
Kinetic → potential
Kinetic → thermal
Thermal → kinetic
The thermal (heat) energy is produced by friction
10 .
Which is the MAIN energy transfer when a light bulb is switched on?
Electrical → light
Electrical → sound
Light → electrical
Light → thermal
Heat energy is also produced but that is wasted
You can find more about this topic by visiting BBC Bitesize - Energy

Author:  Sue Davison

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