Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
The graph shown in the figure represents a plot of current versus voltage for a given semiconductor. Identify the region, if any, over which the semiconductor has a negative resistance.

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.)
A – pn junction has a depletion layer of thickness .of the order of
On increasing the reverse biases voltage to a large value in a P – N junction diode-current
In the depletion region of a diode ______.
- there are no mobile charges.
- equal number of holes and electrons exist, making the region neutral.
- recombination of holes and electrons has taken place.
- immobile charged ions exist.
A Zener of power rating 1 W is to be used as a voltage regulator. If zener has a breakdown of 5 V and it has to regulate voltage which fluctuated between 3 V and 7 V, what should be the value of Rs for safe operation (Figure)?

If each diode in figure has a forward bias resistance of 25 Ω and infinite resistance in reverse bias, what will be the values of the current I1, I2, I3 and I4?

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.
Describe the following term briefly:
Minority carrier injection in forward biasing.
With reference to a semiconductor diode, define the depletion region.








