$12$ cells each of e.m.f $2 V$ are connected in series among them, if $3$ cells are connected wrongly. Then be effective e.m.f. of the combination is:

18 V

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12 V

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24 V

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6 V

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Solution

The correct option is B $12 V$
$12$ cells are connected emf of each is $2 V$
$3$ cells are wrongly connected
effective emf $= 9 \times 2 - 3 \times 2$
$= 12 V$

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12 cells each of e.m.f 2V are connected in series among them, if 3 cells are connected wrongly. Then be effective e.m.f. of the combination is:

The correct option is B 12V12 cells are connected emf of each is 2V 3 cells are wrongly connectedeffective emf =9×2−3×2=12V

$12$ cells each of e.m.f $2 V$ are connected in series among them, if $3$ cells are connected wrongly. Then be effective e.m.f. of the combination is:

The correct option is B $12 V$
$12$ cells are connected emf of each is $2 V$
$3$ cells are wrongly connected
effective emf $= 9 \times 2 - 3 \times 2$
$= 12 V$