In the circuit diagram shown in Fig. 4.53, a voltmeter reads 30 V when connected across `400 Omega` resistance. Calculate what the same voltmeter read

In the circuit diagram shown in Fig. 4.53, a voltmeter reads 30 V when connected across `400 Omega` resistance. Calculate what the same voltmeter read
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In the circuit diagram shown in Fig. 4.53, a voltmeter reads 30 V when connected across `400 ... when it is connected across `300 Omega` resistance.
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