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  4. A diode connected to an external resistance and an e.m.f. Assuming that the barrier potential developed in diode is 0.5 V. What will be the value of current in the circuit in milliampere?

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Q. A diode connected to an external resistance and an e.m.f. Assuming that the barrier potential developed in diode is $0.5 V$. What will be the value of current in the circuit in milliampere?Physics Question Image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Effective voltage in the circuit $V =4.5-0.5=4 V$
Current in the circuit $I=\frac{V}{R}=\frac{4}{100}=0.04 A$
$I=0.04 A =40 mA$