Question

explain ohm's law with equation ?

Answer 1

V is directly proportional to i

Answer 2

Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit.

In other words by doubling the voltage across a circuit the current will also double. However if the resistance is doubled the current will fall by half.

In this mathematical relationship the unit of resistance is measured in Ohms.


Ohm's Law formula

The Ohm's Law formula or equation is very straightforward.

Ohm's law can be expressed in a mathematical form:

V=IRV=IR

Where:
    V = voltage expressed in Volts
    I = current expressed in Amps
    R = resistance expressed in Ohms

The formula can be manipulated so that if any two quantities are known the third can be calculated.

I=VRI=VR

R=VIR=VI