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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

Determine the current recorded by the ammeter for the circuit depicted in the figure.

Options

  1. A0.2 A
  2. B0.6 A
  3. C0.4 A
  4. D1.2 A

Correct answer

C. 0.4 A

Step-by-step solution

The given circuit has a horizontal axis of symmetry. Due to this symmetry, the potentials at the corresponding nodes in the upper and lower branches are equal. Therefore, the potential difference across each of the 50 resistors is zero, and no current flows through them. The 50 resistors can be removed from the circuit. The simplified circuit consists of two parallel branches, each with three 10 resistors in series. Resistance of the upper branch = 10 + 10 + 10 = 30 . Resistance of the lower branch = 10 + 10 + 10 =

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