Answer :
Ohm’s law: Ohm’s law states that the electric current flowing through a conductor
is directly proportional to the potential difference across the ends of the conductor,
provided the temperature and other physical conditions of the conductor remain the same.
For experimental verification of Ohm’s law
Apparatus :
A conductor of resistance R,
an ammeter,
a voltmeter,
a battery,
a variable resistance (or rheostat used to change the current in the circuit),
connecting wires,
a key and
sand paper
are required for experimental verification.