Define ohm's law ?? V=IR

According to Ohm’s law, the current (I) flowing through a conductor is directly proportional to the potential difference (V) across its ends, provided its physical conditions remain the same.

V µ I

V/I = Constant

V/I = R

V = IR

where R is a constant of proportionality called resistance of the conductor.

Resistance is the property of a conductor to resist the flow of charges through it.

The S.I. unit of resistance is ohm (Ω).

From

R = V/I, 1 ohm = 1 volt/ampere

The property of the conduct due to which it opposes the flow of current through it is called as resistance of conductor.

The current through a resistor is inversely proportional to its resistance. If the resistance is doubled the current gets halved. A component used to regulate current without changing the voltage source is called variable resistance. In an electric circuit, a device called rheostat is often used to change the resistance in the circuit. A conductor having some appreciable resistance is called a resistor. A component of identical size that offers a higher resistance is a poor conductor. An insulator of the same size offers even higher resistance.