Electrical Symbols & series vs parrallel Cirtcuts

Symbos and current, voltage, resistance in series and parallel

Cell

Battery of cells

Power Supply

d.c Power supply

a.c power supply

Fixed resistor

Variable Resistor

Heater

Fuse

Switch

Earth or ground

Junction or conductors

Lamp

Generator

Motor

Ammeter

Voltmeter

Light-emiting diode

Electric bell

Series Circuts

A series circuit is a circuit in which components are arranged in a single path.

Current in a series circut

• The current is the same through each component in a series circuit.

• I=I1=I2

Resistance in a series circut

• The total resistance in a series circuit is the sum of all individual resistances: Rtotal= R1 + R2 +R3

Voltage in series circut

The sum of the voltage drops across each component is equal to the total voltage supplied by the source.

• Vtotal=V1+V2+V3

Parallel Circuts

A parallel circuit is a circuit in which the components are arranged so that there is more than one path for the current.

current in a parallel circuts

I=I1+I2

Resistance in a parallel circut

Voltage in a parrallel circut

V=V1=V2