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.
Related posts:
Fundamentals of Electricity:resistance
Tools and Equipment:using Test equipment
Audio Amplifier Performance:A Brief History of Amplifiers
Noise and Grounding:Amplifier Grounding
Transformers:Electromagnetic induction
Power Supply Design:High Power Systems
The SCR:Phase Shifting the SCR
Basic Concepts of Static Control part3
summary of power Supplies
Audio Amplifiers:Junction Transistors
Timing relays:Motor-Driven Timers
Fixed Appliance and Socket Circuits:Special Outlets
POWER ELECTRONIC CONVERTERS FOR MOTOR DRIVES:VOLTAGE CONTROL – D.C. OUTPUT FROM D.C. SUPPLY
SIMPLIFIED LEAKAGE SATURATION CORRECTIONS