Electricity Flashcards
1
Q
What is a direct current?
A
It is a current that is produced by a cell or batteries. It only flows in one direction.
2
Q
What is an alternating current?
A
It is an electrical current that comes from a plug point. It changes direction 100 times per second.
3
Q
Where does electricity come from?
A
It comes from a power station. These power stations burn mostly coal to produce electricity.
4
Q
What is resistance?
A
Resistance is the effect on the brightness of bulbs. The more bulbs we add in a circuit, the greater the resistance, and the greater the resistance, the dimmer the bulb gets.
5
Q
What does resistance do?
A
It opposes the flow of electrons.
