Question

How to make numericals by OHM'S law ?

Answer 1

by using the formula V=IR

Answer 2

You can make different numericals by using Ohm's Law.

Like one example is given below .

A heater of resistance 50 ohm is connected to 220 volt line. How much current will it draw?

Solution :

We are given that :

The resistance of heater, R = 50 ohm

Given volt , V = 220 volt .

We know very well that according to Ohm's law ,

Volt = Current × Resistance

V = I×R

Using it we can get I (Current) ,

Current = Volt / Resistance

I = V/R

I = 220 volt / 50 ohm = 4.4 A

The required current to be drawn = 4.4 A

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Who gave Ohm's law ?

=> A German physicist named George Simon Ohm studied the relationship between electric current and potential across the ends of a conductor. He did it in 1826.

He gave a law which states that the electric currentflowing in 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.

Mathematically we can say that :

V = IR