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A potentiometer is an accurate and versa...

A potentiometer is an accurate and versatile device to make electrical measurements of `E.M.F.` because the method involves

A

cells.

B

potential gradients.

C

a condition of no current flow through the galvanometer.

D

a combination of cells, galvanometer and resistances.

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  15. A Daniel cell is balanced on 125 cm length of a potentiometer wire. No...

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  18. In a potentiometer experiment two cells of e.m.f. E and E are used...

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