Resistors

1
Resistors

• Measuring the value of the Resistance.
• Colour Code
• Series and Parallel Circuits

2
Voltmeter-Ammeter Method

• The ratio of V/I gives the resistance.
• A graph of V vs I will produce a straight line
  with the slope being the resistance, in ?

A
R1
V
V
3
Wheatstone Bridge

• This is a slide-wire potentiometer.
• When the bridge is balanced, no current flows
  through the Galvanometer.

L1
Rx
G
V
R1
L2
4
Colour Code used on Resistors.
tolerance
multiplier
Second digit
First digit
5
Series Circuits

• Rt R1 R2 R3 . .
• Vt V1 V2 V3 . .
• It I1 I2 I3 . .

R1
R2
V
R3
6
Parallel Circuits

• Vt V1 V2 V3 . .
• It I1 I2 I3 . . .

R1
R2
V
R3