Directions: In the following questions, A statement of Assertion (A) ...
Magnetic poles exist in pairs. So assertion is true. The bar magnet does not exert a torque on itself in its own magnetic field. Torque is proportional to cross product of
and
.The angle between
and
being 0, the cross product is 0. So, there will be no torque. So reason is also true. But R cannot explain A.
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Directions: In the following questions, A statement of Assertion (A) ...
Assertion (A): The magnetic field configuration with 3 poles is not possible.
Reason (R): No torque acts on a bar magnet itself due to its own field.
The correct answer is option 'B', which means both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Explanation:
Assertion (A): The magnetic field configuration with 3 poles is not possible.
This statement is true. In magnetism, a bar magnet is known to have two poles - a North pole (N) and a South pole (S). These poles are responsible for the magnetic field associated with the magnet. The magnetic field lines of a bar magnet always form closed loops, with the field lines emerging from the North pole and entering the South pole. This magnetic field configuration with two poles is a fundamental property of magnets.
Reason (R): No torque acts on a bar magnet itself due to its own field.
This statement is also true. When a bar magnet is placed in an external magnetic field, it experiences a torque (turning force) that tends to align itself with the external field. However, when the bar magnet is considered in isolation, without any external field, there is no torque acting on the magnet itself due to its own field. This is because the magnetic field lines within the magnet form closed loops and do not exert any net torque on the magnet as a whole.
Explanation of the Answer:
The reason given in statement (R) does not provide a correct explanation for the assertion in statement (A). While statement (R) is true, it does not directly address the fact that a magnetic field configuration with 3 poles is not possible. The existence of only two poles (North and South) in a bar magnet is a fundamental property of magnets and is not related to the torque acting on the magnet itself.
Hence, the correct answer is option 'B' - Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).