PN Junction Diode » Exercise – 1
16. Match list I and list II and select the correct one using the codes given below :
List I List II
P. Resistance 1. Current noise
Q. Diode 2. Partition noise
R. Triode 3. Shot noise
S. PN junction 4. Johnson noise
(a) P- (4), Q – (1), R- (2), S- (3)
(b) P- (2), Q – (3), R- (1), S- (4)
(c) P- (1), Q – (2), R- (3), S- (4)
(d) P- (4), Q – (3), R- (2), S- (1)
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
GATE 2023 Total Info ENGG DIPLOMA UGC NET Total Info IES 2023 Total Info PSUs 2022 Total Info CSIR UGC NET Total Info JAM 2023 Total Info M TECH 2023 Total Info RAILWAY 2022 Total Info
Related Posts
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…
Semiconductor Physics » Exercise - 2 51. Generally the value of ac resistance is ________ the value of dc resistance at the same operating point. (a) smaller than (b) larger than (c) the same as (d) unrelated to 52. Calculate static resistance RD of a diode having ID = 30 mA and VD = 0.75 V. (a) 25 (b) 40 (c) 0.04 (d) 0.025 53. Calculate ID if RD = 30 and VD = 0.84 V. (a) 28 mA (b) 0.028 mA (c) 2.8 A (d) 280 A 54. Which of the following elements is most frequently used for doping pure Ge or Si? (a) Boron (b) Gallium (c) Indium (d) All of the above 55. The diffused impurities with ________ valence electrons are called donor atoms. (a) 4 (b) 3 (c) 5 (d) 0 56. In what state is a silicon diode if the voltage drop across it is about 0.7 V? (a) No bias (b) Forward bias (c) Reverse bias (d) Zener region 57. What unit is used to represent the level of a diode forward current IF? (a) pA (b) nA (c) A (d) mA 58. The condition of a semiconductor diode can be determined quickly using a…