Multiple choice

A PN junction diode is connected to a battery of emf 5.5 V and external resistance 5.1 kΩ. The barrier potential in the diode is 0.4 V. The current in the circuit is

  1. 0.07843 mA

  2. 1.07 mA

  3. 927.27 A

  4. 28050 A

  5. 12750 A
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Out of 5.5 volts, 0.4 volt (barrier potential) is dropped across the forward biased diode and the remaining 5.1 volts appears across the 5.1 kΩ resistance. So, the current through the resistance is (5.5 V /5.1kΩ), which is equal to 1.07 mA

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