Which currents are used for inducing heat in the high frequency induction furnace?(a) Alternating primary currents(b) Direct primary currents(c) Alternating secondary currents(d) Direct secondary currentsThe question was asked by my school teacher while I was bunking the class.My question is based upon Induction Furnace in division Metal Furnace and Practice of Casting-Forming-Welding II

Which currents are used for inducing heat in the high frequency induct

1.	Which currents are used for inducing heat in the high frequency induction furnace?(a) Alternating primary currents(b) Direct primary currents(c) Alternating secondary currents(d) Direct secondary currentsThe question was asked by my school teacher while I was bunking the class.My question is based upon Induction Furnace in division Metal Furnace and Practice of Casting-Forming-Welding II
Answer» The correct choice is (c) Alternating secondary currents Explanation: A HEAVY amount of alternating secondary current, by ELECTROMAGNETIC induction, is INDUCED in the metal charge. This causes the metal to get heated, because of the RESISTANCE OFFERED by the metal charge.

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