Question

Current flowing in an electric circuit is inversely proportional to the resistance when potential difference is fixed. In an experiment, it is observed that a current of 200 mA flows when resistance of circuit is 30 Ohm. Find the resistance when current flowing is 350 mA

Answer 1

This one is the simplest method possible

We know V = IR

Potential difference V is fixed

In first case

I1 - Current

R1- Resistance
​​​​​
V = I1*R1

In second case

I2 - Current

R2 - Resistance

V = I2*R2

I1*R1= I2*R2

Given I1 = 200mA
R1 = 30 ohm
I2 = 350 mA

R2 = I1*R1/I2

R2 = 200*30/350

R2 = 17.14 ohm