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Electricity

In the war of the currents, which inventor was in favour of using Alternating Current to power our homes?
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Thomas Edison
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0
Albert Einstein
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0
Nikola Tesla
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Georg Ohm
In the war of the currents, which inventor was in favour of using Direct Current to power our homes?
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0
Thomas Edison
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0
Albert Einstein
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0
Nikola Tesla
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0
Georg Ohm
What does Alternating Current mean?
Current that flows in one direction
Current that changes its direction periodically
Current that changes its direction once
What does Direct Current mean?
Current that flows in one direction
Current that changes its direction periodically
Current that changes its direction once
Choose the correct energy conversion for the following appliances
Electrical Energy -> Light + Sound Energy
Electrical Energy -> Heat + Sound Energy
Electrical Energy -> Light + Heat Energy
Electrical Energy -> Heat Energy
Choose the correct energy conversion for the following appliances
Electrical Energy -> Kinetic + Sound Energy
Electrical Energy -> Light + Sound Energy
Electrical Energy -> Kinetic Energy
Electrical Energy -> Heat + Sound Energy
Which of the following is the correct equation for Electrical Power
P = QV
P = VR
P = IV
P = QR
Calculate the power of a bulb if when it is switched on and has 5A of current and 20V passing through.
100W
100J
4W
10W
Calculate the current flowing through a television if it has 480Wof power at 240V
0.2A
2A
20A
2W
The electrical energy in our homes is calculated using which of the following units?
KJh
KWs
KJs
KWh
When wiring a 3-pin plug, to which part is the live wire connected to?
Top
Right
Left
Nowhere
When wiring a 3-pin plug, to which part is the Earth wire connected to?
Top
Left
Right
Nowehre
What is the purpose of a fuse in a socket?
For safety
For decoration
To complete the circuit
To eliminate heat losses
What happens when excess current flows through a fuse?
Nothing
The Earth wire breaks
The Live wire is neutralised
The fuse wire melts and breaks the circuit
Name a suitable fuse for an appliance with a current rating of 3A
1A
3A
5A
13A
Why do some appliances only have 2 pins instead of 3?
Because of double insulation
Because the appliances are unsafe to touch
Because these appliances require less voltage
Because these appliances are not made in Europe
Is the wiring in this picture safe? Why?
Yes, there is nothing wrong
No, the wires can create a short which could lead to an electrical fire
No, the wires are not neat
No, the wires are coloured
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