In the given circuit, the voltmeter records $5\, volts$. The resistance of the voltmeter in $ohms$ is
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(b) Since voltmeter records $5\,V$, it means the equivalent. Resistance of voltmeter and $100 \,\Omega$ must be $50$, because in series grouping if resistances are equal, they share equal potential difference. It conclude that resistance of voltmeter must be $100 \,\Omega$.
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