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KCET2022PhysicsCurrent Electricity

10 identical cells each potential E and internal resistance r are connected in series to form a closed circuit

Options

  1. A3 E
  2. B13 E
  3. C7 E
  4. D10 E

Correct answer

A. 3 E

Step-by-step solution

According to given situation, total voltage of 10 cells =10 E Total resistance of 10 cells =10 r Current in the circuit, I= 10 E 10 r = E r Potential difference across 3 cells, V=I (3 r)= E r 3 r=3 E Hence, ideal voltmeter will read 3 E .

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