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
2 Likes
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).
Answered By
3 Likes
Related Questions
Assertion (A) : Decomposition reactions are generally endothermic reactions.
Reason (R) : Decomposition of organic matter into compost is an exothermic process.
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.
Assertion (A) : A human child bears all the basic features of human beings.
Reason (R) : It looks exactly like its parents, showing very little variations.
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.
Assertion (A) : The amount of ozone in the atmosphere began to drop sharply in the 1980s.
Reason (R) : The oxygen atoms combine with molecular oxygen to form ozone.
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.
A student performs the following experiment in his school laboratory.
List two observations to justify that in this experiment a chemical change has taken place.