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COMEDK2021PhysicsCurrent Electricity

For the given electrical arrangement, what is the value of current I ?

Options

  1. A6 ~A
  2. B5 ~A
  3. C7 ~A
  4. D8 ~A

Correct answer

D. 8 ~A

Step-by-step solution

Applying KCL at the bottom junction: 4A + 1A = 5A flows upward. At the top junction, 3A flows down and 2A leaves to the right, so 1A continues downward. Applying KCL at the middle junction: Currents entering: 5A (from left) + 5A (from bottom) + 1A (from top) = 11A Currents leaving: 3A + I 3A + I = 11A I = 8A

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