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Twenty cells each of emf E and internal ...

Twenty cells each of emf E and internal resistance r are connected in series to form a loop . If polarity of one of the cell is reserved, then terminal potential across this cell is

A

`(19E)/(10)`

B

`(11E)/(10)`

C

`(9E)/(10)`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
A
V=E+ir
`i=(20E-2E)/(20r) = 18/20 E/r = 9/10 E/r`
`V=E+9/10E/rxxr`
`=19/10E`
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