Questions
A candidate connects a moving coil voltmeter V, a moving coil ammeter A and a resistance R as shown in figure. If the voltmeter reads 20 Y and the ammeter reads 4 A, R is
detailed solution
Correct option is B
Let a current of x amperes passes through the voltmeter, then 4−x amperes passes through the resistance R. Therefore, voltmeter reading 20 = 4−x R∴ R=204−x , i.e., R > 5 ΩTalk to our academic expert!
Similar Questions
Resistances R1 and R2, each of are connected in series as shown in figure. The potential difference between A and B is kept 120 volt. what will be the reading of voltmeter connected between the points C and D if resistance of voltmeter is
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