Choose the correct options:
Ferrimagnetism/ ferromagnetism arises due to unequal number of domains in opposite direction resulting in net magnetic moment.,

Choose the correct options: MnO_2 is antiferromagnetic/ ferromagnetic substance.

Choose the correct options: For a hcp unit cell, the number of atoms per unit cell is 6/4.

Choose the correct option The magnetic field inside a long straight solenoid carrying current

Choose the correct option:A rectangular coil of copper wires is rotated in magnetic field.The direction of induced current changes once in each:

Magnetic field arises due to charges in motion. Can a system have magneticmoment even though its net charge is zero?

Answer the following questions regarding earth’s magnetism:The earth’s field, It Is claimed, roughly approximates the field due to a dipole of magnetic moment 8 xx 10^22 J "T1 located at Its centre. Check the order of magnitude of this number In some way.