SSC JE Electrical Engineering 24 Jan 2018 Morning Paper

Question : 187 of 199

Marks: +1, -0

Low frequency supply is necessary for direct core type induction furnaces because

Magnetic coupling between the primary and secondary circuit is poor.
With normal frequency supply the electromagnetic forces severe stirring action in the molten metal.
Both Magnetic coupling between the primary and secondary circuit is poor with normal frequency supply the electro-magnetic forces severe stirring action in the molten metal.
None of Magnetic coupling between the primary and secondary circuit is poor and with normal frequency supply the electro-magnetic forces cause severe stirring action in the molten metal.

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