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Question
When a 12 V battery is connected across an unknown resistor, there is a current of 4 mA in the circuit. Find the value of the resistance of the resistor.
When a 12 V battery is connected across an unknown resistor, there is a current of 4 mA in the circuit. Find the value of the resistance of the resistor.
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Solution
The correct option is C 3000 Ω
Given:
Current, I=4 mA = 4×10−3 A
Voltage, V=12 V
According to Ohm's law,
Resistance, R=VI
= 12 V4×10−3 A
= 3000 Ω
Given:
Current, I=4 mA = 4×10−3 A
Voltage, V=12 V
According to Ohm's law,
Resistance, R=VI
= 12 V4×10−3 A
= 3000 Ω
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