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If the area of the hysteresis curve of the transformer cores is large, then it will dissipate:

If the area of the hysteresis curve of the transformer cores is large, then it will dissipate: Correct Answer High heat

CONCEPT:

Electromagnet:

  • An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
  • Electromagnets usually consist of wire wounds into a coil.
  • The magnetism of the electromagnets can be increased by placing a soft iron rod inside the solenoid.
  • The core of electromagnets is made of ferromagnetic materials which have high permeability and low retentivity.
  • Electromagnets are used in electric bells, loudspeakers, and telephone diaphragms.
  • Giant electromagnets are used in cranes to lift machinery, and bulk quantities of iron and steel.
  • In certain applications like transformer cores and telephone diaphragms, the material goes through an ac cycle of magnetization for a long period.
  • The hysteresis curve for the core of the transformer and telephone diaphragms should be tall and narrow. So that the energy dissipated and the heating will consequently be small.


EXPLANATION:

  • The hysteresis curve for the core of the transformer and telephone diaphragms should be tall and narrow. So that the energy dissipated and the heating will consequently be small.
  • Therefore if the area of the hysteresis curve of the transformer cores is large, then it will dissipate high heat. Hence, option 2 is correct.

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