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Science — CBSE Class 10 board question

Q1. [1]
Assertion (A) : No two magnetic field lines are found to cross each other. Reason (R) : The compass needle cannot point towards two directions at the point of intersection of two magnetic field lines.
  1. (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  2. (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
  3. (C) Assertion (A) is true, but Reason (R) is false.
  4. (D) Assertion (A) is false, but Reason (R) is true.
Previously asked in CBSE board exam
2025 31/1/1 Q19
Generated by claude-sonnet-4-6 · 2026-06-15 06:48 · grounding rag
Model Answer

(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Explanation

The textbook explicitly states: "No two field-lines are found to cross each other. If they did, it would mean that at the point of intersection, the compass needle would point towards two directions, which is not possible." So R directly explains A — option (A) is correct.

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Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.