Q1. [1] § 11.2 ELECTRIC POTENTIAL AND POTENTIAL DIFFERENCE
Assertion (A) : Electrons move from lower potential to higher potential in a conductor.
Reason (R) : A dry cell maintains electric potential difference across the ends of a conductor.
- (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- (C) Assertion (A) is true, but Reason (R) is false.
- (D) Assertion (A) is false, but Reason (R) is true.
Previously asked in CBSE board exam
2024 31/5/1 Q19
Generated by claude-sonnet-4-6 · 2026-06-15 06:43 · grounding rag
Model Answer
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Electrons (negative charges) move from lower potential to higher potential (opposite to conventional current). A dry cell does maintain potential difference, but this fact does not explain why electrons move from low to high potential.
Explanation
- A is true: Electrons carry negative charge, so they move opposite to conventional current — from lower to higher potential.
- R is true: A dry cell (chemical cell) generates and maintains potential difference across its terminals (stated in the source passage).
- R does not explain A: The reason why electrons move from low to high potential is their negative charge nature, not the existence of a dry cell. The dry cell is simply a source of potential difference, unrelated to the direction of electron movement. Hence option (B).
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