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Q.

In the circuit shown, if the variable resistance ‘R’ is increased, the reading of the volt meter. (consider the cell to be ideal cell)
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a

decreases

b

is zero always

c

Increases

d

remains unchanged

answer is C.

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Detailed Solution

The  3Ω resistor is in parallel connection to the battery.  Hence, current in it is not changed when ‘R’ is either increased or decreased.

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