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Ohm's Law

When a 12 V b...

Question

When a 12 V 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.

A

4800

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B

2400

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C

3600

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D

1200

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Solution

The correct option is A
4800

$R e s i s t a n c e = \frac{V}{I}$

$= \frac{12}{2.5 * 10^{- 3}}$

$= 4800 o h m$

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