Can you think of a magnetic field configuration with three poles?

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A)If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : We cannot think of magnetic field configuration with three poles. Reason: A bar magnet does exert a torque on itself due to its own field.

Must every magnetic field configuration have a north pole and a south pole? What about the field due to a toroid?

What is the value of horizontal component of the earth's magnetic field at the magnetic poles?

A magnetic field can be produced by

How would you detect the presence of magnetic field on an unknown planet?

Three identical bar magnets are rivetted together at centre in the same plane as shown in Fig. EP 5.17 (a). This system is placed at rest in a slowly varying magnetic field. It is found that the system of magnets does not show any motion. The north-south poles of one magnet is shown in the Fig. Determine the poles of the remaining two.

List three sources of magnetic field.