Question 8:
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.
Answer:
Resistance (R) of a resistor is given by Ohm’s law as,
V= IR
R = V/I
Where,
Potential difference, V = 12 V
Current in the circuit, I = 2.5 mA = 2.5 × 10−3 A
Therefore, the resistance of the resistor is kΩ.
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