Science
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.
options
- (A) and (R) are true and (R) is the reason for (A).
- (A) and (R) are true and (R) is not the reason for (A).
- (A) is true, but (R) is false.
- (A) is false, but (R) is true.
Electro-Magnetism
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Answer
(A) and (R) are true and (R) is the reason for (A).
Reason —
Assertion (A) is true because magnetic field lines represent the direction of the magnetic field at different points in space. If two field lines were to cross, it would mean that the magnetic field has two different directions at the same point, which is not possible in nature. Therefore, magnetic field lines never intersect each other.
Reason (R) is true because a compass needle always aligns itself along the direction of the magnetic field at a point and if two magnetic field lines were to intersect, the compass needle would have to point in two directions simultaneously, which is impossible.
Hence, (A) and (R) are true and (R) is the reason for (A).
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