Question

154. A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves :
(1) Cells
(2) Potential gradients
(3) A condition of no current flow through the galvanometer
(4) A combination of cells, galvanometer and resistances

Answer 1

Answer:

(3) A condition of no current flow through the galvanometer...

Explanation:

A potentiometer is an accurate and versatile device to make electrical measurements of emf because the method involves a condition of no current flow through the galvanometer, the device can be used to measure potential difference, internal resistance of a cell and compare emf's of two sources.

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Answer 2

Answer:

Mark as Brainliest

Explanation:

Sorry what is Potentiometer ??

I only know about speedometer