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Which outcome occurs when a reverse-biased tunnel diode's depletion region becomes extremely narrow?

A)Increased current due to quantum tunneling
B)Decreased capacitance due to wider gap
C)Increased resistance due to carrier depletion
D)Oscillations cease due to excessive damping

💡 Explanation

When a tunnel diode's depletion region is very narrow, quantum tunneling occurs because electrons can directly tunnel through the barrier, leading to a significant current flow even in reverse bias. Therefore increased current results, rather than decreased capacitance, increased resistance, or oscillation damping, all of which need different mechanisms.

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