मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

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? - Physics

Advertisements
Advertisements

प्रश्न

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?

टीपा लिहा
Advertisements

उत्तर

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.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 19: Electric Current through Gases - Exercises [पृष्ठ ३५३]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 19 Electric Current through Gases
Exercises | Q 11 | पृष्ठ ३५३

संबंधित प्रश्‍न

With the help of neat labelled circuit diagram explain the working of half wave rectifier using semiconductor diode. Draw the input and output waveforms.


Explain the working of P-N junction diode in forward and reverse biased mode.


Draw a labelled diagram of a full wave rectifier. Show how output voltage varies with time if the input voltage is a sinusoidal voltage.


Show on a graph, the variation of resistivity with temperature for a typical semiconductor.


With reference to semi-conductors answer the following : 

(i) What is the change in the resistance of the semi-conductor with increase in temperature ?

(ii) Name the majority charge carriers in n-type semi-conductor.

(iii) What is meant by doping ?


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.


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.


With reference to a semiconductor diode, what is meant by: 
(i) Forward bias
(ii) Reverse bias
(iii) Depletion region


Answer the following question.
Why photodiodes are required to operate in reverse bias? Explain.


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


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 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)?


Answer the following giving reasons:

A p-n junction diode is damaged by a strong current.


Describe briefly the following term:

minority carrier injection in forward biasing.


With reference to a semiconductor diode, define the depletion region.


Draw a labelled characteristic curve (l-V graph) for a semiconductor diode during forward bias.


An ideal PN junction diode offers ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×