Assertion–Reason (Evaluate Truth and Explanation): Assertion (A): The needle of a compass always points towards the North. Reason (R): The needle is painted red.
Verbal Reasoning
Assertion and Reason
Difficulty: Easy
Choose an option
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ABoth (A) and (R) are true, and (R) is the correct explanation of (A).
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BBoth (A) and (R) are true, but (R) is not the correct explanation of (A).
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C(A) is true, but (R) is false.
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D(A) is false, but (R) is true.
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EBoth (A) and (R) are false.
Answer
Correct Answer: (A) is true, but (R) is false.
Explanation
Introduction / Context:We test a physical fact about magnetism against an irrelevant cosmetic reason.
Given Data / Assumptions:
- (A) Idealized: a magnetized needle aligns roughly with Earth’s magnetic field, pointing north–south (one tip “towards North”).
- (R) Claims paint color causes the effect.
Concept / Approach:Magnetic alignment is due to torque on a magnetic dipole in Earth’s magnetic field; paint color is irrelevant.
Step-by-Step Solution:
1) (A) True in principle (allowing for local declination/variation).2) (R) False: red paint is a convention to mark the north-seeking end; it does not cause alignment.3) Hence (R) cannot explain (A).Verification / Alternative check:Unpainted but magnetized needles still align; painted but unmagnetized ones do not.
Why Other Options Are Wrong:(a)/(b) require (R) true; (d)/(e) misstate (A).
Common Pitfalls:Confusing indicators (paint) with causes (magnetism).
Final Answer:Option C: (A) true, (R) false.