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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A voltmeter with resistance R v ​= 2500 Ω indicates a voltage of 125 V in the circuit shown in Fig. A2.18. What is the series resistance (R) to be connected with voltmeter in this circuit so that it indicates 100 V?

A voltmeter with resistance R v ​= 2500 Ω indicates a voltage of 125 V in the circuit shown in Fig. A2.18. What is the series resistance (R) to be connected with voltmeter in this circuit so that it indicates 100 V?

An ammeter is obtained by shunting a 30 Ω galvanometer with a 30 Ω resistance. What additional shunt should be connected across it to double the range ?