Q. A magnetic pole is a terminal where a magnetic material meets a non-magnetic material.
Q. The net magnetic flux emerging through a closed surface is zero.
Q. A toroidal magnet has no air gap.
Q. The toroidal type of construction is employed where there must be a minimum of external magnetic field.
Q. With the insertion of an iron core into a coil, magnetic field is strengthened.
Q. With the insertion of an iron core into a coil the reluctance of the iron path increases.
Q. Ferromagnetism arises out of the electron structure.
Q. When a ferromagnetic material is magnetized its magnetic poles get oriented in the direction of coercive force.
Q. During the process of magnetization when all the magnetic dipoles of a magnetic material get oriented in one direction, the core is said to be grain oriented.
Q. Static magnetic fields induce currents in closed conducting loops.
Q. The material commonly used for shielding or screening magnetism is brass.
Q. When the iron price is magnetized various molecules are forced into more definite alignment.
Q. Poles of a magnet cannot be separated.
Q. The direction of magnetic lines of force is from N-pole to S-pole.
Q. Lines of force never intersect.
Q. High silicon steel has comparatively higher permeability and high saturation.
Q. Hysteresis loss is the amount of energy dissipated as heat in the magnetic material.
Q. Eddy current losses are reduced by using thin plates of high resistivity material.
Q. Neutral temperature of a thermocouple is constant for a given thermocouple.
Q. Thomson effect is not present in lead.
Q. Thermoelectric power at neutral temperature is maximum.
