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BITSAT2010PhysicsSemiconductorsActual

A d.c. battery of V volt is connected to a series combination of a resistor R and an ideal diode D as shown in the figure below. The potential difference across R will be

Options

  1. A2 V when diode is forward biased
  2. BZero when diode is forward biased
  3. CV when diode is reverse biased
  4. DV when diode is forward biased

Correct answer

B. Zero when diode is forward biased

Step-by-step solution

In forward biasing, the diode conducts. For ideal junction diode, the forward resistance is zero; therefore, entire applied voltage occurs across external resistance R i.e., there occurs no potential drop, so potential across R is V in forward biased.

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