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
Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Special Diodes » Exercise - 260. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ........ (a) 1 : 1 (b) 100 : 1 (c) 1000 : 1 (d) 40000 : 1
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…
Special Diodes » Exercise - 274. A zener diode is always .......... connected. (a) reverse (b) forward (c) either reverse or forward (d) none of the above
Special Diodes » Exercise - 260. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ........ (a) 1 : 1 (b) 100 : 1 (c) 1000 : 1 (d) 40000 : 1