science : physics
- Created by: lina sama
- Created on: 27-07-10 13:57
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Current is measured in Amps (A) using an Ammeter
Voltage is measured in Volts (V) using a Voltmeter
Voltage = Current x Resistance
The resistance in a circuit can be increased by adding more components, such as resistors and lamps.
Circuit symbols
The diagram below shows the standard circuit symbols you need to know.
Two things are important for a circuit to work:
- there must be a complete circuit
- there must be no short circuits
A current flows when an electric charge moves around a circuit. No current can flow if the circuit is broken, for example, when a switch is open…
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