Magnetism and Matter · Question 6

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. (A) is not correct but (R) is correct
3. (A) is correct but (R) is not correct
4. Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Answer

(1) Both (A) and (R) are correct and (R) is the correct explanation of (A)

Solution

As per NCERT, magnetic field lines always form continuous closed loops: they do not start or end anywhere.

The net magnetic flux through any closed surface is zero (Gauss's law for magnetism), B d S = 0

There is no point from which field lines can diverge or into which they can converge, i.e. no isolated north or south pole.

Magnetic monopoles do not exist; (A) and (R) are both correct and (R) explains (A).

Answer: (1)