Questions
In the circuit shown, the reading of the ammeter is doubled after the switch is closed. Each resistor has a resistance equal to and the ideal cell has an emf equal to 10 V. Then the ammeter has a resistance equal to
detailed solution
Correct option is A
I1=102+RA, I2=10RA and I2=2I1Solving, we get RA=2 ΩTalk 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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