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  4. The reading of an ideal voltmer in the circuit shown is :

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Q. The reading of an ideal voltmer in the circuit shown is :Physics Question Image

NEETNEET 2019Current Electricity

Solution:

image
$(V_1 -V_2) = \frac{30}{25} - \frac{20}{25}$
$ = \frac{10}{25} = \frac{2}{5} = 0.4\,v$