AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Ohm's Law: The potential difference across the ends of a resistor is directly proportional to the current through it, provided its temperature remains constant.
Since this is a 1-mark question, state the law in one line and mention the one key condition (constant temperature). Examiners expect both parts — the law itself and the condition — to award full marks.