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Which outcome occurs from quantum tunneling in a tunnel diode when doping concentration increases significantly?

A)Decreased reverse current at breakdown
B)Increased current at zero bias voltage
C)Reduced capacitance due to depletion width
D)Oscillations stop due to transit time

💡 Explanation

When doping increases significantly, the depletion region narrows: quantum tunneling occurs with higher probability across the junction because the energy bands become highly offset, leading to direct electron flow even at zero bias. Therefore increased current at zero bias voltage results, rather than options requiring different conditions.

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