Question

When a 12V battery is connected across an unknown resistor there is a current 2.5mA in the circuit. Calculate the value of the resistance of the resistor.

Answer 1

1mA = 10^-3A
2.5mA=2.5*10^-3A
p.d.=12V
R=V/I
R=12/2.5*10^-3
R=120000/25
R=6000omega

Answer 2

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According to Ohm’s law,

V = IR

=v/I

Here, V = 12 V and I = 2.5 mA = 0.0025 A Therefore,

=12/ 0.0025 = 4800 Ω = 4.8 kΩ

I hope, this will help you___❤❤

Thank you

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