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A battery of e.m.f 10 V and internal resistance 0.5 W is connected across a variable resistance R. The value of R for which the power delivered in it is maximum is given by (a) 0.5 ohm (b) 1.0 ohm (c) 2.0 ohm (d) 0.25 ohm



A battery of e.m.f 10 V and internal resistance 0.5W is connected across a variable resistance R. The value of R for which the power delivered in it is maximum is given by


        (a)    0.5 ohm


        (b)    1.0 ohm


        (c)    2.0 ohm


(d)    0.25 ohm


Grade:11

1 Answers

Hrishant Goswami
343 Points
9 years ago

(a)

The output power of a cell is given by

P = I2R

 

Maximum power is delivered to the load only when the internal resistance of the source is equal to the load resistance (R). Then

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