Ex. 8: A potentiometer wire of length 4 m and resistance 892 is connected in series with a battery of e.m.f. 2 V and negligible internal resistance. If the e.m.f of cell balances against length of 217 cm of the wire, find the e.m.f. of cell. When a cell is shunted by a resistance of 152, the balancing length is reduced by 17 cm. Find the internal resistance of a cell.
Ex. 8: A potentiometer wire of length 4 m and resistance 892 is connected in series with a battery of e.m.f. 2 V and negligible internal resistance. If the e.m.f of cell balances against length of 217 cm of the wire, find the e.m.f. of cell. When a cell is shunted by a resistance of 152, the balancing length is reduced by 17 cm. Find the internal resistance of a cell.
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Transcribed Image Text:Ex. 8: A potentiometer wire of length 4 m and
resistance 892 is connected in series with a
battery of e.m.f. 2 V and negligible internal
resistance. If the e.m.f of cell balances against
length of 217 cm of the wire, find the e.m.f. of
cell. When a cell is shunted by a resistance of
15 , the balancing length is reduced by
17 cm. Find the internal resistance of a cell.
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