Magnetism and M...

If a diamagnetic solution is poured into a U-tube and one arm of this U-tube placed between the poles of a strong magnet with the meniscus in a line with the field, then the level of the solution will

Which of the following is true?

The magnetic field of earth is due to

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

Isogonic lines on magnetic map will have

Choose the correct alternative, in relation to properties of magnetic lines of force.

In case of a bar magnet, lines of magnetic induction

Assertion (A): A magnet remains stable, If it aligns itself with the field

Reason (R): The P.E. of a bar magnet is minimum, if it is parallel to magnetic field.

The relative permeability is represented by$$\mu _{r}$$ and susceptibility is denoted by $$\chi $$ for a magnetic substance then for a paramagnetic substance.

Ferromagnetic ore properties are due to

Permanent magnets are made from

Out of dia, para and ferromagnetism, the universal property of all substances is

Assertion (A) : To protect any instrument from external magnetic field, it is put inside an iron box
Reason (R) : Iron is a ferromagnetic substance

A compass needle, which shows the direction at the earth's magnetic pole is

The relative permeability of silicon is $$0.99837$$ and that of palladium is $$1.00692$$, choose the correct option from the following :