The reading of the ideal voltmeter in the adjoining diagram will be ................. $V$
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Current flowing in the circuit $i = \frac{E}{R} = \frac{{10 - 4}}{{20 + 10}} = \frac{1}{5}\,A$
$P.D.$ across $AC $$ = \frac{1}{5} \times 20 = 4\,V$
$P.D.$ across $AN = 4 + 4 = 8\,V$
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