Question

what is Ohm's law and draw neat labelled circuit diagram containing a battery ,a key,a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it??

Answer 1

ohm's law: at a constant temperature the current flowing through a conductor is directly proportional to the potential difference across the ends of the circuit
that is if a current I flows through a conductor under a potential difference V then v proportional to I or V=R×I where R is a constant chord resistance of the material

Answer 2

what is Ohm's law and draw neat labelled circuit diagram containing a battery ,a key,a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it