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JIPMER2013PhysicsCurrent Electricity

The internal resistance of a primary cell is 4 . It generates a current of 0.2 A in an external resistance of 21 . The rate at which chemical energy to consumed in providing current is

Options

  1. A1 ~J / s
  2. B5 ~J / s
  3. C0.42 ~J / s
  4. D0.8 ~J / s

Correct answer

A. 1 ~J / s

Step-by-step solution

Rate of energy H t =i^2 R (But total Resistance R=21+4=25 ) So, H t =0.2 0.2 25=1 ~J / s

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