Question

When a 12v battery is connected accross an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistors.

Answer 1

R=V/I

resistance R = 12/2.5

R = 4.8

Answer 2

$\huge\bf\red{\mid{\overline{\underline{Solution:}}}\mid}$

Given, Potential difference (v) = 12V

Current (I) = 2.5 mA = 2.5/1000 A = 2.5 × 10^-3 A

From Ohm's law,

$\boxed{\bold{V =IR}}$

》Resistance (R) = V/I

》 R = 12/ 2.5×10^-3

》R = 12×10/25×10^-3

》R = 24 × 10^3/5

》R = 24 ×10×100/5

》R = 4800 ohm

》R = $\boxed{\bold{4.8\:kohm}}$

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