Magnetism and M...

Assertion The properties of paramagnetic and ferromagnetic substances are not affected by heating.
Reason As temperature rises, the alignment of molecular magnets gradually decreases.

Assertion Soft iron is used as transformer core.
Reason Soft iron has narrow hysteresis loop.

Assertion Magnetism is relativistic.
Reason When we move along with the charge so that there is no motion relative to us, we find no magnetic field associated with the charge.

Assertion The earth\'s magnetic field does not affect the working of a moving coil galvanometer.
Reason Earth\'s magnetic field is very weak.

Assertion Diamagnetic materials can exhibit magnetism.
Reason Diamagnetic materials have permanent magnetic dipole moment.

Assertion For making permanent magnets, steel is preferred over soft iron.
Reason As retentivity of stell is smaller.

Assertion Gauss\'s theorem is not applicable in magnetism.
Reason Mono magnetic pole does not exist

Assertion When a magnet is brought near iron nails, only translatory force acts on it.
Reason The field due to a magnet is generally uniform.

Assertion When a magnetic dipole is placed in a non uniform magnetic field, only a torque acts on the dipole.
Reason Force would also act on dipole if magnetic field were uniform.

Assertion Reduction factor (K) of a tangent galvanometer helps in reducing deflection due to current.
Reason Reduction factor increases with increase of current.