Same chapter2 marksDifficulty: Easy
A potential difference of 12 V is applied across a resistor of 4 Ω. Calculate the current flowing through it.
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2 marksDifficulty: Easy
State Ohm's law and the conditions under which it holds.
Original Khojo Papers practice question — not from a past board paper.
Answer
The current flowing through a conductor is directly proportional to the potential difference across its ends, provided its physical conditions, in particular its temperature, remain unchanged. So V = IR, where R is the resistance of the conductor.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A filament lamp does not obey Ohm's law over a wide range because its temperature, and so its resistance, changes with current.
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