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An electrical circuit is shown in figure...

An electrical circuit is shown in figure. Calculate the potential difference across the resistor of `400 Omega` as will be measured by the voltmeter Vof resistance `400 Omega` either by applying Kirchhoff's rules or otherwise.

Text Solution

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The given circuit may be redrawn as follows: Clearly this is a case of balanced Wheat-Stone Bridge. The 100Omega and D can be removed Now the reading of the voltmete`r = V_(BC) = I_(1), (200Omega) =(10V)/((100+200)Omega)xx(200Omega)=(20)/(3)Volt`
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