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COMEDK2024PhysicsCurrent Electricity

For a cell, V - I graph is given below. Which of the following options gives correct value of emf of cell and its internal resistance?

Options

  1. A1.5 ~V , 1.0
  2. B1.5 ~V , 2.0
  3. C1.0 ~V , 1.5
  4. D1.5 ~V , 1.5

Correct answer

D. 1.5 ~V , 1.5

Step-by-step solution

From graph, V=1.5 ~V at I=0 EMF of cell =1.5 ~V At V=0, I=1000 ~mA =1 ~A Now using, E-V=I r We have, 1.5-0=1 r r=1.5

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