A cell of internal resistance |CurrentElectricityJEEMain2019

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JEE MAIN 2019

08-04-2019 S2

Question

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 :

Select the correct option:

A

R = 1000 r

B

R = r

C

R = 2r

D

R = 0.001 r

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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

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