A coil that con sists of 450 windings is wound aroundabakelite ring. The meandiameter of the ring is 100 mm and the diameter of the bakelite core is 20 mm.The currentthrough the coil is 3 A. Determine:1.1a) the field stren gthb) the flux den sityc) the total fluxA ringhas two halves. The onehalf is made from Cast iron, while the other ismade from Cast steel. The two halves are held 1 mm apart with the aid of apaper disc. The cross-section al area and mean circumference of the ringis 345mm? and0.6 m respectively. Therelative permeability of cast iron is 2400, whilethat of cast steel is 600. The ring has a coil with 200 win dings. The currentflowthrough the coil causes a flux den sity of 0.48T.1.2Calculate the:a) mmib) currentflowIgnore the effects of fringing andleakage.

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A coil that con sists of 450 windings is wound around a bakelite rin g. The mean diameter of the ring is 100 mm and the diameter of the bakelite core is 20 mm. The currentthrou gh the coil is 3 A. Determine: 1.1 a) the field stren gth b) the flux den sity c) the total flux

A coil that con sists of 450 windings is wound around a bakelite rin g. The mean diameter of the ring is 100 mm and the diameter of the bakelite core is 20 mm. The currentthrou gh the coil is 3 A. Determine: 1.1 a) the field stren gth b) the flux den sity c) the total flux

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 8RQ

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Concept explainers

Magnetic Moment

The magnetic moment is defined as the alignment of a magnet and its strength when the magnet is creating a magnetic field. There are number of examples of the magnetic moment, few are a current carrying conductor in the form of coil, elements at microscopic levels like electrons and many more.

Question

A coil that con sists of 450 windings is wound aroundabakelite ring. The mean
diameter of the ring is 100 mm and the diameter of the bakelite core is 20 mm.
The currentthrough the coil is 3 A. Determine:
1.1
a) the field stren gth
b) the flux den sity
c) the total flux
A ringhas two halves. The onehalf is made from Cast iron, while the other is
made from Cast steel. The two halves are held 1 mm apart with the aid of a
paper disc. The cross-section al area and mean circumference of the ringis 345
mm? and0.6 m respectively. Therelative permeability of cast iron is 2400, while
that of cast steel is 600. The ring has a coil with 200 win dings. The currentflow
through the coil causes a flux den sity of 0.48T.
1.2
Calculate the:
a) mmi
b) currentflow
Ignore the effects of fringing andleakage.

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