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  4. A battery of emf 10V and internal resistance 0.5 ohm is connected across a variable resistance R. The value of R for which the power delivered in it is maximum is given by :

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Q. A battery of emf 10V and internal resistance 0.5 ohm is connected across a variable resistance R. The value of R for which the power delivered in it is maximum is given by :

JIPMERJIPMER 2001Current Electricity

Solution:

We know that for obtaining maximum power, the internal resistance must be equal to variable resistance so, the value of R will $ 0.5\,\Omega $ .