1
Q
Direct current can only flow….
A
In one direction
2
Q
Alternating current repeatedly…
A
Reverses its direction of flow
3
Q
What does a main circuit usually have
A
It has a live wire which is alternately positive and negative every cycle.
4
Q
What is the power supplied to a device
A
The energy transfered to it each second
5
Q
When charges flow through a resistor…
A
Energy transfered to the resistor makes it hot
6
Q
What happens when charges flows round a circuit for a given time?
A
The energy supplied by the battery is equal to the energy supplied.
7
Q
What does a domestic electricity meter measure
A
How much energy is supplied to a house
