Question

what is ohms law and one example with formula

Answer 1

According to ohm's law, curreny flowing in a conductor is directly proporational to potential difference applied acrossed the ends of a conductor at constant temperature.
FORMULA
v = RI
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Answer 2

Hello,

Good morning :))


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●●Ohm’s Law: ●●


This law states that the ratio of potential difference between the ends of a conductor to the current flowing through the conductor is a constant. This constant is defined as Resistance of the conductor.

Or V= I R
Or R = V / I

Where R = Constant (Resistance )

It depends upon the length ,shape and the nature of the material of the conductor. The variation between potential difference (V) and current (I) through a conductor is a straight line.


●●Deduction of Ohm’s Law:●●

As drift velocity is given by Vd=eEt/m

But  Electric field across the conductor of length l is

E=V/l

Thus  Vd=e V/ml

Also,  I=Anevd

By putting value of vd in the equation of I (equation 1 of relation of the current and drift velocity),we get

I=Ane(eV/ml)=(Ane2/ml)V

Or  V/I=ml/Ane2=R

Where R is a constant for a given conductor. It is known as the resistance of the conductor.

Thus  V=RI

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Hope it helps u !!!

# Nikky