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QPages 419-421: Q26: HC Verma: Concepts of Physics - Volume 2 Semiconductors and Semiconductor Devices Pages 419-421: Q26 Solution: What are the readings of the ammeters and shown in figure.…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often assume all diodes in a parallel circuit are forward-biased or misidentify the anode-cathode orientation relative to the battery terminals. Always explicitly check the potential difference across each diode to confirm if it is forward-biased (low resistance) or reverse-biased (infinite resistance) before calculating current.
What are the readings of the ammeters and shown in figure. Neglect the resistance of the meters. Assume that the resistance of each diode is zero in forward bias and is infinity in reverse bias.)
Step-by-Step Verified Solution
**Answer:** A_ = 1 A, A_ = Zero.
**Step-by-Step Explanation:**
The first ammeter is in a branch where the diode is forward-biased, so it reads 1 A. The second ammeter is in a branch where the diode is reverse-biased, so it reads zero .
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