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JEE Main20199 Jan 2019Morning ShiftPhysicsCurrent ElectricityActual

When the switch S , in the circuit shown, is closed, then the value of current i will be:

Options

  1. A2   A
  2. B5   A
  3. C3   A
  4. D4   A

Correct answer

B. 5   A

Step-by-step solution

i = i 2 + i 2 V - 0 2 = 20 - V 2 + 10 - V 4 2 V + V - 10 + 2 ( V - 20 ) = 0 5 V - 50 = 0 V = 10   V i = 10 2 = 5   A

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