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Current Electricity
Question
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A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves :

  • Cells

  • Potential gradients

  • A condition of no current flow through the galvanometer

  • A combination of cells, galvanometer and resistances

Answer

C.

A condition of no current flow through the galvanometer

Reading of potentiometer is accurate because during taking reading it does not draw any current from the circuit.

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