Q.

The temperature inside a resistance furnace can be varied by

  • ADisconnecting some of the heating elements
  • BVarying the operating voltages
  • CVarying the current through heating elements
  • DBy any of the above method
Correct Answer : (D)

By any of the above method

Hints :

The temperature inside a resistance furnace can be varied by Disconnecting some of the heating elements or Varying the operating voltages or Varying the current through heating elements.

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