Q.A potentiometer works on 

  • AHeating effect
  • BMagnetic effect
  • CElectromagnetic induction
  • DNone of the above
Correct Answer : (D)

None of the above

Hints :

A potentiometer is defined as a 3 terminal variable resistor in which the resistance is manually varied to control the flow of electric current. A potentiometer acts as an adjustable voltage divider.

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