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15
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Why is it dangerous to touch a live wire and the ground?
A current will flow through you. This can interrupt the rhythm of your heart and cause burns.
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banana
Go to last place!
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magnet
Take 20 points!
Okay!
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shark
Other team loses 5 points!
Okay!
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banana
Go to last place!
Oops!
15
×
When using a toaster, which type of transferred energy is being wasted?
Light
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15
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Which of the two types of bulb is more efficient?
LED
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15
×
Would a plug still work without the earth wire?
Yes, the earth wire is for safety
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15
×
Will a bird be electrocuted if it sits on a national grid cable?
No, if it is only touching the live wire, it is not completing a circuit so no current flows.
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seesaw
Swap points!
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shark
Other team loses 15 points!
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gift
Win 15 points!
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lifesaver
Give 15 points!
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15
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What is the difference between an A.C supply and a D.C supply?
D.C one direction, constant size. A.C changing direction and changing size.
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15
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Which energy source used to generate electricity is non renewable, but not a fossil fuel?
Nuclear
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15
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When using something with moving parts, how do you reduce the wasted energy transferred as heat (due to the friction force).
Lubrication (grease, oil etc.)
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15
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Which type of power station transfers the energy from naturally hot rocks underground?
Geothermal power station
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15
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What affect is burning fossil fuels having on the environment?
Release CO2 which is a greenhouse gas - causing climate change
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15
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What is the term for the "energy transferred per unit charge"?
Voltage (potential difference)
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15
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What is the equation to calculate electrical power?
P = V x I
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15
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What is the frequency of the UK mains electricity supply (it's an A.C supply)
50Hz
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eraser
Reset score!
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rocket
Go to first place!
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fairy
Take points!
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25
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lifesaver
Give 5 points!
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