Question

when a 12Vbattery is connected across an unknown resistor there is a current of 2.5 mA in the circuit find the value of the resistance of the resistor
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Answer 1

Answer:

V=I R

V=12V

I=2.5mA

=2.5 X 10^-3

therefore,

=12/2.5 X 10^-3

0.0048

Answer 2

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

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Potential Difference = V = 12V

Current = I = 2.5 mA

= 2.5 × 10^-3 A

Finding Resistance

By Ohm's Law,

V = IR

V / I = R

R = V / I

R = 12 / 2.5 × 10^-3

R = 12 × 10³ / 2.5

R = 12 × 10³ / 25 × 10

R = 12 × 10 / 25 × 10³

R = 12 × 2 / 5 × 10³

R = 24 / 5 × 10³

R = 4.8 × 10³ Ω

R = 4.8 kΩ

Thus, resistance is 4.8 kΩ. (Answer).

Explanation:

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