Question

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

Answer 1

1 mA = 10^-3 A

2.5 mA = 2.5 * 10^-3 A

Resistance = Potential difference (V) / Current ( I)

= 12 V / 2.5 * 10^-3

= 12 * 10^3 /2.5

= 12 / 2.5 * 10^3 = 120 / 25 * 10^3 = 4.8 * 10^3

= 4800 ohms

Therefore the value of resistance is 4800 ohms

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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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