Question

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 m A in the circuit. Find the value of the resistance.​

Answer 1

Answer:

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Ohm’s law gives resistance (R) of a resistor as

V= IR

R= V/I

Where, Potential difference, V= 12 V

Current in the circuit, I= 2.5 mA = 2.5 x 10^-3 A

12 = 2.5 x 10^-3 R

Therefore, the resistance of the resistor is 4.8 x 10^3 Ω

Answer 2

Answer:

Given: V=12 V

I=2.5 mA

Let the resistance be R

By Ohm's Law,

V=IR

12=2.5×10 −3R

R=4.8×10

3Ω