A potentiometer is an ideal instrument for measuring e.m.f. because

Options :
  1. it has no pointer
  2. it is compact
  3. it is cheap
  4. it measures e.m.f. without taking current from a cell


Answer and Explanation :-

Answer: Option 4

Explanation:

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Never question another man's motive. His wisdom, yes, but not his motives.
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