Question

When a 40V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. Find the value of the resistance of the resister​

Answer 1

Answer:

R = 400 ohms

Explanation:

Given that,

Voltage of the battery, V = 40 V

Current in the unknown resistor, I=100\ mAI=100 mA

Let R is the resistance of the resistor. It can be calculated using Ohm's law. it gives the relationship between the voltage, resistance and current.

R=\dfrac{V}{I}R=

I

V

R=\dfrac{40\ V}{10^{-1}\ A}R=

10

−1

A

40 V

R = 400 ohms

So, the value of the resistance of the resistor is 400 ohms