Advertisements
Advertisements
प्रश्न
Why is a zener diode considered as a special purpose semiconductor diode?
Advertisements
उत्तर
Zener diode works only in reverse breakdown region that’s why it in considered as a special purpose semiconductor.
संबंधित प्रश्न
(i) Explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction.
With reference to semiconductor devices, define a p-type semiconductor and a Zener diode.
What is the use of Zener diode?
In a photo diode, the conductive increases when the material is exposed to light. It is found that the conductivity changes only if the wavelength is less than 620 nm. What is the band gap?
(Use Planck constant h = 4.14 × 10-15 eV-s, Boltzmann constant k = 8·62 × 10-5 eV/K.)
With reference to a semiconductor diode, what is meant by:
(i) Forward bias
(ii) Reverse bias
(iii) Depletion region
With reference to Semiconductor Physics,
Name the diode that emits spontaneous radiation when forward biased.
Consider an npn transistor with its base-emitter junction forward biased and collector base junction reverse biased. Which of the following statements are true?
- Electrons crossover from emitter to collector.
- Holes move from base to collector.
- Electrons move from emitter to base.
- Electrons from emitter move out of base without going to the collector.
Figure shows the transfer characteristics of a base biased CE transistor. Which of the following statements are true?
At Vi = 0.4 V, transistor is in active state.
At Vi = 1 V, it can be used as an amplifier.
At Vi = 0.5 V, it can be used as a switch turned off.
At Vi = 2.5 V, it can be used as a switch turned on.
Draw V-I characteristics of a p-n Junction diode.
Answer the following giving reasons:
A p-n junction diode is damaged by a strong current.
