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Doctors Medicines MCQs Q&A

  1. Megger
  2. DC potentiometer
  3. Kelvin double bridge
  4. AC potentiometer
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1 Answers

Option 1 : Megger

Null type instrument: An instrument in which zero or null indication determines the magnitude of the measured quantity, such type of instrument is called a null type instrument.

It uses a null detector which indicating the null condition when the measured quantity and the opposite quantity are the same.

Examples: potentiometer, bridges, LVDT etc.

D.C. potentiometer, Kelvin double bridge, and AC potentiometer employ a null method of measurement. In the megger method, the null method does not employ.

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