Power in a Parallel Circuit
The power dissipated by any resistor is given by, the voltage across that resistor multiplied by the current flowing through it.
Power in a Series / Parallel Circuit
Example
1. Find the total power dissipated in the circuit.
2. Find the power dissipated by:
Domestic Example
An electric shower element is drawing a current of 36 Amps. The voltage at its terminals is 228 Volts. What is the power dissipated by the shower element?
Question
The following loads are connected to a 230 V supply.
1. 9 kW electric shower
2. 3 kW immersion heater
3. 750 W food mixer
4. 1.5 kW electric fire
5. 10 X 75 W lamps Find:
1. The current taken by each appliance.
2. The total current.
3. The total power.
4. The resistance of each appliance.
5. The approximate total resistance.
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