Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is also in series with the diode. The current is a. 10 mA b. 9.3 mA c. 0.7 mA d. 0
Last Answer : b. 9.3 mA
Description : Avalanche breakdown in a diode occurs when a. Potential barrier is reduced to zero. b. Forward current exceeds certain value. c. Reverse bias exceeds a certain value. d. None of these
Last Answer : c. Reverse bias exceeds a certain value.
Description : In the diode equation, the voltage equivalent of temperature is a. 11600/T b. T/11600 c. T x 11600 d. 11600/T2
Last Answer : b. T/11600
Description : When a reverse bias is applied to a diode, it will a. Raise the potential barrier b. Lower the potential barrier c. Increases the majority-carrier a current greatly d. None of these
Last Answer : a. Raise the potential barrier
Description : The knee voltage (cut in voltage) of Si diode is a. 0.2 V b. 0.7 V c. 0.8 V d. 1.0 V
Last Answer : b. 0.7 V
Description : The arrow direction in the diode symbol indicates a. Direction of electron flow. b. Direction of hole flow (Direction of conventional current) c. Opposite to the direction of hole flow d. None of the above
Last Answer : b. Direction of hole flow (Direction of conventional current)
Description : When the diode is forward biased, it is equivalent to
Last Answer : When the diode is forward biased, it is equivalent to An On switch
Description : Why does a forward biased diode offer low resistance?
Last Answer : The external voltage over comes the junction potential and provides an easy path for the flow of charges across the junction. Hence it offers low resistance.
Description : A device used to avoid the relay destroying the op-amp is A. diode B. LED C. reverse bias diode D. forward biased diode
Last Answer : reverse bias diode
Description : A light emitting diode emits light only when (a) Reversed biased (b) forward biased (c) unbiased (d) none
Last Answer : (b) forward biased
Description : Describe the working of PN junction diode with neat sketch under forward biased condition.
Last Answer : If the p-region (anode) is connected to the positive terminal of the external DC source and nside (cathode) is connected to the negative terminal of the DC source then the biasing ... The large number of majority carriers crossing the junction constitutes a current called as the forward current.
Description : Why does a reversed biased diode offer high resistance?
Last Answer : The charge carriers are repelled from the junction and no current flows through the junction. Thus the diode offers a high resistance.
Description : When is a p-n junction said to be forward biased or what is meant by forward biasing of p-n junction? How does it affect resistance?
Last Answer : When the positive terminal of a cell is connected to p-side and negative terminal to the n-side of a p-n junction then it is said to be forward biased. It offers low resistance.
Description : If PN junction is forward biased its resistance is (a) Zero (b) Infinity (c) A few ohm (d) A few kilo ohms
Last Answer : c) A few ohm
Description : How much time a diode takes to switch ON in forward bias condition.
Last Answer : t=0 sec.
Description : P-n junction when reversed biased acts as a (a) Capacitor (b) inductor (c) on switch (d) off switch
Last Answer : d) off switch
Description : Sketch circuit diagram of positive biased clipper using diode and explain its working.
Last Answer : Positive Series Clipper with positive Vr. The following figure represents the circuit diagram for positive series clipper when the reference voltage applied is positive. During the positive cycle ... Hence the input signal that is greater than the reference voltage, appears at the output.
Description : When biased correctly, a zener diode:
Last Answer : When biased correctly, a zener diode: Has a constant voltage across it
Description : When using an ohmmeter to test a semiconductor diode, you find a low resistance in both the forward and reverse bias directions. This indicates that the diode has a/an ____________. A. open B. short C. good resistive quality D. good capacitive quality
Last Answer : Answer: B
Description : What is the typical back-to-forward resistance ratio of a good-quality diode?
Last Answer : 10-to-1 ratio.
Description : As a rule of thumb, what is an acceptable ratio of back-to forward resistance for a diode?
Last Answer : Greater than 10 to 1
Description : Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.
Last Answer : Definition: The resistance offered by the diode to the AC operating conditions is known as the Dynamic resistance' or Incremental resistance' or AC resistance' of a diode. It is ... Dynamic resistance is actually the reciprocal of the slope of the forward characteristics.
Last Answer : 10 ohm
Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is
Last Answer : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is 9.3 mA
Description : The device in figure 'B' shown in the illustration will conduct when the ____________. EL-0067 A. base-emitter is forward biased and the collector-base is reverse biased B. anode-cathode is forward ... is reversed biased D. terminal 1-2 is forward biased and the emitter-terminal 1 is reverse biased
Description : When an SCR is forward biased, what is needed to cause it to conduct?
Last Answer : A gate signal.
Description : When a PN junction is forward biased, what happens to the depletion region?
Last Answer : The depletion region decreases.
Description : For normal operation of a transistor, the collector base junction is kept (a) Unbiased (b) forward biased (c) reverse biased (d) none
Last Answer : (c) reverse biased
Description : When a P - N junction is forward biased 1.only electrons in N-region are injected into P-region 2.only holes in P-region are injected into N-region 3.majority carriers in each region are injected into the other region 4.minority current is reduced to zero
Last Answer : When a P - N junction is forward biased majority carriers in each region are injected into the other region
Description : For the active mode BJT operation (A) Emitter Base Junction is Forward Biased and Collector Base Junction is Forward Biased (B) Emitter Base Junction is Reverse Biased and Collector Base Junction ... Biased (D) Emitter Base Junction is Reverse Biased and Collector Base Junction is Forward Biased
Last Answer : For the active mode BJT operation Emitter Base Junction is Forward Biased and Collector Base Junction is Reverse Biased.
Description : A forward-biased PN-junction, (A) results in increase in diffusion current (B) results in increase in drift current (C) results in decrease in drift current (D) results in decrease in diffusion current
Last Answer : A forward-biased PN-junction, results in increase in diffusion current
Description : Junction breakdown occurs: a) With forward bias b) With reverse bias c) Under high temperature condition d) Because of excess heating of the diode
Last Answer : Ans: B
Description : While testing a semi-conductor diode with an ohmmeter, both the forward and reverse readings are almost in the infinity range. This would indicate that the unit is _____________. A. good B. open C. grounded D. shorted
Description : Forward current through a semi-conductor diode circuit is due to ________ (a) Minority carriers (b) majority carriers (c) holes (d) electrons
Last Answer : (b) majority carriers
Description : Photo diode operates in the _______ condition (a) Forward bias (b) null (c) both a & d (d) reverse bias
Last Answer : (d) reverse bias
Description : Define i)P-N junction diode ii) Depletion layer iii)Forward bias iv)Reverse bias of P-N junction diode
Last Answer : i)P-N junction diode: It is a semiconductor device in which half of its region is P-type and other half is N-type. ii) Depletion layer: The region where free electrons and free holes are absent ... and negative terminal is connected to p-side of p-n junction diode, it is said to be reverse bias.
Description : Explain the forward bias characteristics of a P-N Junction diode.
Last Answer : forward and reverse characteristics of P-N junction diode.
Description : To turn a UJT ON, the forward bias on emitter diode should be: 1. more than the peak point voltage 2. less than the peak point voltage 3. Equal to the peak point voltage 4. Equal to the stand - off voltage
Last Answer : To turn a UJT ON, the forward bias on emitter diode should be: more than the peak point voltage
Last Answer : Yes it can be, and it will act like a normal PN junction diode. The characteristic of ZENER diode is exactly same as PN junction diode in forward Bias.
Description : A straight line symbol shows the A. fuse B. diode C. connecting lead D. switch
Last Answer : connecting lead
Description : What type of bias makes a diode act as a closed switch?
Last Answer : Forward bias.
Description : Is there a polite way to ask a friend to take you off of a distribution list. I recieve many emails of forwarded jokes, politically biased propaganda, etc. that I don't want. And should you ask a friend if they want to be on a distribution list before you just start forwarding emails?
Last Answer : I just delete them without reading if the content is consistantly stupid. I learned to stay mum from irate friends who didn’t like my critique of the stuff they thought was amusing.
Description : Refering to the illustrated schematic diagram, which of the following statements is true when the motor is running in the forward direction? EL-0011 A. Normally-open contacts '4-5' are closed. B. Current ... switch. C. Normally-closed contacts 'R' are open. D. The blowout coils must be closed.
Description : The device which transfer the signal from low resistance region to high resistance region is – (1) diode (2) transistor (3) capacitor (4) inductor
Last Answer : (2) transistor Explanation: A transistor transfers a signal from a low resistance to high resistance. It has two PN-junctions: one junction is forward biased and other junction is reverse biased ... is introduced in the low resistance, circuit and output is taken from the high resistance circuit.
Description : When checking a diode with an ohmmeter, what is indicated by two high resistance measurements?
Last Answer : The diode is open or has a high-forward resistance.
Description : The device which transfer the signal from low resistance region to high resistance region is (1) diode (2) transistor (3) capacitor (4) inductor
Last Answer : transistor
Description : Teacher of high caste is biased with the low caste's students. What advices do you would like to give to the teacher? (a) Rebuke him for narrow thinking (b) His attitudes is all right. ... against the constitutional provisions (d) He should not behave against the national spirit & need of the hour
Last Answer : d) He should not behave against the national spirit & need of the hour
Description : A high-caste teacher is biased with the scheduled caste's students. What advise do you like to give to that teacher? Options: A) Nothing is wrong in his attitude B) He should not behave ... and need of the hour C) Scold him for narrow thinking D) Threat him against the constitutional provisions
Last Answer : B) He should not behave against the national spirit and need of the hour
Description : In the circuit shown in Fig. 4.67, the resistance of the ammeter A is negligible and that of thevoltmeter V is very high. When the switch S is open, t
Last Answer : In the circuit shown in Fig. 4.67, the resistance of the ammeter A is negligible and that of ... internal resistance of the cell (iii) value of R.
Description : An ohmmeter used to test for front-to-back resistance of a PN junction diode should produce roughly what ratio? A. 100:01:00 B. 500:01:00 C. 1000:01:00 D. 5000:01:00
Last Answer : Answer: A