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Concepts Of Physics MCQ Edition [Volume 2]PhysicsSemiconductors and Semiconductor Devices

Determine the current through the resistance R in the figure if R = 48 .

Options

  1. A0.46 A
  2. B0.125 A
  3. C0.17 A
  4. D0.13 A

Correct answer

D. 0.13 A

Step-by-step solution

Let the potential of the right common node be 0 V and the potential of the left common node be V . From the circuit diagram, we can identify the polarities of the batteries: 1. The top battery ( 4 V ) has its longer line on the left, so its positive terminal is on the left. 2. The middle battery ( 6 V ) has its shorter, thicker line on the left, so its negative terminal is on the left. Assuming the diode is ideal and forward-biased, it acts as a short circuit. We can apply Kirchhoff's Current Law (KCL) at the left

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