Electric current, potential difference resistance Flashcards
1
Q
Fixed resistor
A
This limits the current in a circuits.
2
Q
Variable resistor
A
This allows the current to be varied.
3
Q
Heater
A
This is designed to transfer the energy from an electric current to heat the surroundings.
4
Q
Indicator
A
This is designed to emit light as a signal when a current passes through it.
5
Q
Ammeter
A
This is used to measure an electric current.
6
Q
Diode
A
A diode allows current through in one direction only.
7
Q
Light-emmitting diode
A
This emits light when a current passes through it.
8
Q
Switch
A
This enables the current in a circuit to be switched on or off.
9
Q
Cell
A
This is necessary to push electrons around a complete circuit. A battery consits of two or more cells. The + symbol next to the long line of the cell indicates that this is the positive terminal of the cell.
