Advertisements
Advertisements
Question
The plate current in a diode is 20 mA when the plate voltage is 50 V or 60 V. What will be the current if the plate voltage is 70 V?
Advertisements
Solution
For 50 V or 60 V, the plate current is 20 mA. That means 20 mA is the saturation current.
At the given temperature, the plate current is 20 mA for all other values of voltages.
Thus, the current at 70 V will be 20 mA.
APPEARS IN
RELATED QUESTIONS
(i) Explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction.
Explain the working of P-N junction diode in forward and reverse biased mode.
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.)
The power delivered in the plate circular of a diode is 1.0 W when the plate voltage is 36 V. Find the power delivered if the plate voltage is increased to 49 V. Assume Langmuir-Child equation to hold.
Diffusion in a p-n junction is due to ______.
Of the diodes shown in the following diagrams, which one is reverse biased?
A – pn junction has a depletion layer of thickness .of the order of
The nature of binding for a crystal with alternate and evenly spaced positive and negatively ions is
In forward bias width of potential barrier in a p + n junction diode
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) |
 (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?
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?
Describe the following term briefly:
Breakdown voltage in reverse biasing
Choose the correct circuit which can achieve the bridge balance.
When the p-side and n-side are joined, in which direction do holes diffuse?
What is left behind near the junction, creating a depletion layer?
Which practical effect is associated with forward bias?
What happens to reverse current at the breakdown voltage?
Which expression applies Ohm's law to reverse-biased resistance?
