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What is the maximum frequency accepted for the motor, used in current production of high frequency induction furnace?

(a) 5000 cycles/second

(b) 10000 cycles/second

(c) 7500 cycles/second

(d) 12500 cycles/second

The question was asked in examination.

Question is from Induction Furnace topic in division Metal Furnace and Practice of Casting-Forming-Welding II

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Right answer is (b) 10000 cycles/second

The best I can explain: Motors which are equipped for the production of high frequency current can have a maximum frequency of 10000 cycles every second, in high frequency induction furnace.

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