A voltmeter with resistance 2500 Omega i...

A voltmeter with resistance `2500 Omega` indicates a voltage of `125 V` in the circuit shown in figure. What is the series resistance to be connected ot voltmeter so that it indicates `100 V`? Consider ideal battery.

`625 Omega`

`120 Omega`

`550 Omega`

Data are insufficient

Text Solution

Verified by Experts

The correct Answer is:

(a) emf should be `125 V`.
for second case: `( 100)/(2500) = (25)/(R ) implies = 625 Omega`

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