Question 8: Magnetism and Matter

Question

Given below are two statements : one is labelled as
Assertion (A)
and the other is labelled as
Reason (R).
Assertion (A):
Magnetic monopoles do not exist.
Reason (R):
Magnetic field lines are continuous and form closed loops.
In the light of the above statements, choose the
most appropriate answer
from the options given below:

Accepted Answer

The assertion states that magnetic monopoles do not exist. This is consistent with current experimental findings and the standard formulation of Maxwell's equations.
The reason provided is that magnetic field lines are continuous and form closed loops. This is mathematically expressed by the Maxwell equation:
$$
abla \cdot B = 0$$
This equation tells us that there are no "sources" or "sinks" of magnetic fields (unlike electric fields, which can originate or terminate at charges). In other words, magnetic field lines neither begin nor end; they loop continuously.
Since the fact that the magnetic field lines form closed loops is a direct consequence of the absence of isolated magnetic charges (monopoles), the reason correctly explains the assertion.
Thus, both (A) and (R) are correct, and (R) is the correct explanation of (A).
The most appropriate answer is Option A.

Answer

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

Answer

(A) is not correct but (R) is correct

Answer

(A) is correct but (R) is not correct

Answer

Both (A) and (R) are correct but (R) is
not
the correct explanation of (A)

Magnetism and Matter

Choose the correct answer: