What is meant by the “resistance of a conductor”? Write the relation between resistance, potential difference, and current. b) When a 12V battery is connected across an unknown resistor, there is a current of 2.5mA in the circuit. Calculate the value of the resistance of the resistor.

1. Resistance of a conductor is the property of a This property helps conductor in opposing the flow of current through it.

Work done = potential difference × charge moved

1. Given,

Voltage, V = 12 volt Current, I = 2.5 × 10-3A We know that,

V = IR R = V/I

R = 12/2.5 × 10-3

R = 4.8 × 103ohm = 4800 ohm