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?

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 41: Electric Current through Gases - Exercises [पृष्ठ ३५३]

APPEARS IN

एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
पाठ 41 Electric Current through Gases
Exercises | Q 11 | पृष्ठ ३५३

संबंधित प्रश्‍न

When a forward bias is applied to a p-n junction, it ______.


With reference to semiconductor devices, define a p-type semiconductor and a Zener diode.


What is the use of Zener diode?


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


Why is a zener diode considered as a special purpose semiconductor diode?


Of the diodes shown in the following diagrams, which one is reverse biased?


The current through an ideal PN-junction shown in the following circuit diagram will be:


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 Figure, Vo is the potential barrier across a p-n junction, when no battery is connected across the junction ______.


When an electric field is applied across a semiconductor ______.

  1. electrons move from lower energy level to higher energy level in the conduction band.
  2. electrons move from higher energy level to lower energy level in the conduction band.
  3. holes in the valence band move from higher energy level to lower energy level.
  4. holes in the valence band move from lower energy level to higher energy level.

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.


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.


Explain the formation of the barrier potential in a p-n junction.


Answer the following giving reasons:

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


A semiconductor device is connected in series with a battery, an ammeter and a resistor. A current flows in the circuit. If. the polarity of the battery is reversed, the current in the circuit almost becomes zero. The device is a/an ______.


What is meant by forward biasing of a semiconductor diode?


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×