Question

When does the p-n junction diode act as a closed switch and as an open switch? State any four
advantages of semiconductor devices.​

Answer 1

Answer:

Whenever a specified voltage is exceeded, the diode resistance gets increased, making the diode reverse biased and it acts as an open switch. Whenever the voltage applied is below the reference voltage, the diode resistance gets decreased, making the diode forward biased, and it acts as a closed switch.

Answer 2

Whenever the voltage applied is below the reference voltage, the diode resistance gets decreased, making the diode forward biased, and it acts as a closed switch.

Advantages of semiconductor device

1.Electronic properties of semiconductors can be controlled to suit our requirement.

2.They are smaller in size and light weight.

3.They can operate at smaller voltages (of the order of few mV) and require less current (of the order of pA or mA), therefore,consume lesser power.

4.Almost no heating effects occur, therefore these devices are thermally stable.