Fundamentholfundamenthol
JEE Main2019Physics
Q.

A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be maximum when : 

  1. A

    R = 1000 r

  2. B

    R = r 

  3. C

    R = 2r

  4. D

    R = 0.001 r

Solution

For maximum power in external resistance, Internal resistance = External resistance R = r

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