The electric furnace in which heat is produced by a combination of induced current and skin effect is called _____________ furnace?
Correct answer: C. High frequency induction
- A. Arc
- B. Resistance
- C. High frequency induction
- D. Low frequency induction
Explanation
High-frequency induction furnaces heat through induced currents concentrated near the surface because of the skin effect. Low-frequency induction furnaces rely more on bulk induced-current heating and electromagnetic stirring.
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