# Special Diodes – 27

27. Across a varactor diode, an increase in its reverse bias potential causes :

(a) Width of depletion layer to increase thus increasing the capacitance
(b) Width of depletion layer to decrease thus increasing the capacitance
(c) Width of depletion layer to increase thus decreasing the capacitance
(d) Width of depletion layer to decrease thus decreasing the capacitance

Explanation
Explanation : No answer description available for this question. Let us discuss.
 Subject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant
 Electronics & Communication Engineering Books Sale Question Bank On Electronics & Communication Engineering Book - question bank on electronics & communication engineering; Language: english; Binding: paperback ₹ 355 Sale A Handbook for Electronics Engineering(Old Edition) Made Easy Editorial Board (Author); Marathi (Publication Language); 620 Pages - 01/01/2015 (Publication Date) - Made Easy Publications (Publisher) ₹ 250 Sale Basic Electronic Devices and Circuits Patil (Author); English (Publication Language) ₹ 376 Electronic Circuits: Analysis and Design (SIE) | 3rd Edition Neamen, Donald (Author); English (Publication Language); 1351 Pages - 08/25/2006 (Publication Date) - McGraw Hill Education (Publisher) ₹ 773

## Related Posts

• Special Diodes » Exercise - 270. If the doping level in a crystal diode is increased, the width of depletion layer ........ (a) remains the same (b) is decreased (c) is increased (d) none of the above
Tags: special, diodes, exercise, diode, width, depletion, layer, electronics, engineering
• Special Diodes » Exercise - 147. In a tunnel diode, depletion layer width is of the order : (a) 100 Angstroms (b) 0.1 Micron (c) 1 Micron (d) 5 Microns
Tags: special, diodes, exercise, diode, depletion, layer, width, electronics, engineering
• Special Diodes » Exercise - 14. The capacitance of a varactor diode increases, when the reverse voltage across it is : (a) Decreased (b) Increased (c) Kept constant (d) None of the above
Tags: special, diodes, exercise, capacitance, varactor, diode, reverse, electronics, engineering
• Special Diodes » Exercise - 1 1. A Zener diode : (a)  Is a battery under forward biased condition (b)  Acts like battery when it breakdowns (c)  Is a switch (d)  Is a device having barrier potential more than 5V 2. At 25ºC, a Zener diode rates at 2 watts, its power rating at 50ºC will be : (a)  Zero watts (b)  Less than 1 watt (c)  Greater than 2 watts (d)  Less than 2 watts 3. Silicon is appreciably employed as a base material compared to germanium while manufacturing Zener diode since : (a)  silicon is abundantly available (b)  it is costlier (c)  it has low current capability (d)  it has high temperature capability 4. The capacitance of a varactor diode increases, when the reverse voltage across it is : (a) Decreased (b) Increased (c) Kept constant (d) None of the above 5. The main advantage of a point contact diode is that : (a) The ratio of forward current to reverse current is very high (b) Low input impedance (c) Its cut-in voltage is equal to zero (d) Its reverse resistance is infinite 6. Which one of the following is a Square law device ? (a) Zener diode (b) Crystal diode (c) Tunnel diode (d) Varactor diode 7. Match the given lists. List I…
Tags: diode, electronics, engineering
• Regulated Power Supplies » Exercise - 117. A 30 V zener will have depletion layer width ............ that of 10 V zener. (a) more than (b) less than (c) equal to (d) none of the above
Tags: exercise, depletion, layer, width, electronics, engineering