Advertisements
Advertisements
Question
Draw the circuit arrangement for studying V-I characteristics of a p-n junction diode in (i) forward biasing and (ii) reverse biasing. Draw the typical V-I characteristics of a silicon diode.
Solution
Forward biasing:
Fig. (a)
Reverse biasing:
Fig. (b)
Fig. (c)
Figures (a) and (b) depict the circuit for examining a diode's V-I properties. The value of current is noted for various voltage values. The result is a graph between C and I, as shown in Fig. (c).
It is evident from a junction diode's V-I characteristics that current can only flow through it when it is forward biassed. As a result, when alternating voltage is placed across a forward biassed diode, current only flows during a portion of the cycle. Alternating voltages are rectified using this characteristic.
APPEARS IN
RELATED QUESTIONS
(i) Explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction.
In the following diagram 'S' is a semiconductor. Would you increase or decrease the value of R to keep the reading of the ammeter A constant when S is heated? Give reason for your answer.
With reference to a semiconductor diode, what is meant by:
(i) Forward bias
(ii) Reverse bias
(iii) Depletion region
In semiconductor physics, what is meant by:
(i) rectifier
(ii) an amplifier
(iii) an oscillator
The expected energy of the electron at absolute zero is called:-
On increasing the reverse biases voltage to a large value in a P – N junction diode-current
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.
Draw V-I characteristics of a p-n Junction diode.
Differentiate between the threshold voltage and the breakdown voltage for a diode.
Write the property of a junction diode which makes it suitable for rectification of ac voltages.
