Advertisements
Advertisements
Questions
Write the property of a junction diode which makes it suitable for rectification of ac voltages.
Which characteristic property makes the junction diode suitable for rectification?
State the characteristic property of a junction diode that makes it suitable for rectification.
Advertisements
Solution
When a junction diode has an alternating voltage placed across it, only when the diode is forward-biased can current flow. The junction diode's ability to correct alternating current can be used. This is accomplished through the use of a rectifier circuit. It exhibits high resistance when reverse-biased and low resistance when forward-biased.
APPEARS IN
RELATED QUESTIONS
The gain factor of an amplifier in increased from 10 to 12 as the load resistance is changed from 4 kΩ to 8 kΩ. Calculate (a) the amplification factor and (b) the plate resistance.
In semiconductor physics, what is meant by:
(i) rectifier
(ii) an amplifier
(iii) an oscillator
Diffusion in a p-n junction is due to ______.
With reference to Semiconductor Physics,
Name the diode that emits spontaneous radiation when forward biased.
The current through an ideal PN-junction shown in the following circuit diagram will be:
In a semiconductor diode, the barrier potential offers opposition to only
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.
 (a) |
 (b) |
- Name the type of a diode whose characteristics are shown in figure (A) and figure (B).
- What does the point P in figure (A) represent?
- What does the points P and Q in figure (B) represent?
Consider a box with three terminals on top of it as shown in figure (a):
 (a) |
Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement. A student performs an experiment in which any two of these three terminals are connected in the circuit shown in figure (b).
 (b) |
The student obtains graphs of current-voltage characteristics for unknown combination of components between the two terminals connected in the circuit. The graphs are
(i) when A is positive and B is negative
 (c) |
(ii) when A is negative and B is positive
 (d) |
(iii) When B is negative and C is positive
|
(e) |
(iv) When B is positive and C is negative
 (f) |
(v) When A is positive and C is negative
 (g) |
(vi) When A is negative and C is positive
 (h) |
From these graphs of current-voltage characteristics shown in figure (c) to (h), determine the arrangement of components between A, B and C.
Draw a labelled characteristic curve (l-V graph) for a semiconductor diode during forward bias.
