Questions
An ammeter and a voltmeter of resistance R are connected in series to an electric cell of negligible internal resistance. Their readings arc A and V, respectively. If another resistance R is connected in parallel with the voltmeter then
detailed solution
Correct option is D
After connecting a resistance R in parallel with the voltmeter, its effective resistance decreases. Hence, less voltage appears across it, i.e., V will decrease. Since overall resistance decreases, so more current will flow, i.e., A will increase.Talk to our academic expert!
Similar Questions
A moving coil galvanometer converted into an ammeter reads up to 0.03 A by connecting a shunt of resistance 4r across it and ammeter reads up to 0.06 A, when a shunt of resistance r is used. What is the maximum current which can be sent through this galvanometer if no shunt is used?
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