# Physics 2

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• Created by: kelz0209
• Created on: 12-04-14 08:42
Which of the live, neutral or earth wires is always at 0 volts?
The neutral wire (will also accept earth wire).
1 of 10
Why is the case of a plug usually made out of plastic?
Plastic is a good insulator.
2 of 10
Appliances with double insulation don't need which type of wire?
Earth wire.
3 of 10
What energy transformation occurs when electric current flows through a resistor?
Electrical energy (to kinetic energy) to heat energy.
4 of 10
What is the equation linking Q,V and E?
E(energy)=Q(charge)xV(voltage)
5 of 10
What colour(s) are each of the following wires in an eletrical plug?; 1.Live wire 2.Neutral wire 3.Earth wire.
1.Brown 2.Blue 3.Green and yellow stripes.
6 of 10
Which two wires usually carry the same current?
The live wire and neutral wire.
7 of 10
What type of safety devie contains a wire that is designed to melt when the current passing through it goes above a certain value?
A fuse.
8 of 10
A current of 0.5A passes through a torch bulb. The torch is powered by a 3V battery. Calculate the power of the torch.
Power=current x potential difference= 0.5x3=1.5W
9 of 10
A current of 0.5A passes through a torch bulb. The torch is powered by a 3V battery. In half an hour, 900C of charge pass through the battery. Calculate how much electrical energy the bulb transfers in half an hour.
Energy transferred=charge x potential difference= 900x3=2700J
10 of 10

## Other cards in this set

### Card 2

#### Front

Why is the case of a plug usually made out of plastic?

#### Back

Plastic is a good insulator.

### Card 3

#### Front

Appliances with double insulation don't need which type of wire?

### Card 4

#### Front

What energy transformation occurs when electric current flows through a resistor?

### Card 5

#### Front

What is the equation linking Q,V and E?