In an npn transistor, Holes are the minority carriers.
Description : When an NPN transistor is saturated its Vce?
Last Answer : is zero
Description : Which of the symbols shown in the illustration represents an NPN type transistor? EL-0078 A. A B. B C. C D. D
Last Answer : Answer: B
Description : PNP and NPN transistor:
Last Answer : PNP transistors is the one in which one N, type semiconductor is sandwiched in between two P type or accepter diodes while NPN transistor is the one in which two N type semiconductors are fitted on the both sides of p-type semiconductor to allow to pass current from them.
Description : If the operating point of an NPN transistor amplifier is selected in saturation region, it is likely to result in A) Thermal runaway of transistor B) Clipping of output in the positive half of the ... for high dc collector supply D) Clipping of output in the negative half of the input signal
Last Answer : B) Clipping of output in the positive half of the input signal
Description : What is the relationship between the polarity of the voltage applied to the PNP transistor and that applied to the NPN transistor?
Last Answer : The polarity of voltage applied to the PNP transistor is opposite of that applied to the NPN
Description : What percentage of current in an NPN transistor reaches the collector?
Last Answer : 98 percent.
Description : In the NPN transistor, what section is made very thin compared with the other two sections?
Last Answer : The P or base section.
Description : To properly bias an NPN transistor, what polarity voltage is applied to the collector, and what is its relationship to the base voltage?
Last Answer : Positive, more positive.
Description : In which direction does the arrow point on an NPN transistor?
Last Answer : Outward.
Description : In a transistor, the conventional current flows from base to emitter. The transistor is (a) NPN (b) PNP (c) FET (d) None of these
Last Answer : (a) NPN
Description : Draw symbol of NPN transistor and state three configurations of transistor (BJT)
Last Answer : Configuration - Common Emitter Common Collector Common Base
Description : With neat diagram explain working of NPN transistor.
Last Answer : N-p-n transistor is made by sandwiching thin layer of p-type semiconductor between two layers of n-type semiconductor. It has three terminals - Emitter, Base and collector. The npn transistor has two ... up in the collector as it is more positive. In this way, current flows in the transistor.
Description : In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit (1) All calculations done earlier have to be repeated (2) Replace all calculated voltages by ... all calculated currents by reverse values (4) Replace all calculated voltages and currents by reverse values
Last Answer : In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit Replace all calculated voltages and currents by reverse values
Description : When an NPN transistor is properly biased then most of the electrons from the emitter (A) recombine with holes in the base (B) recombine in the emitter itself (C) pass through the base to the collector (D) are stopped by the junction barrier
Last Answer : a
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 : Minority carriers in N-type are a) Holes b) Electrons c) Neutrons d) Protons
Last Answer : a) Holes
Description : Barrier potential in a P-N junction is caused by (A) Thermally generated electrons and holes. (B) Diffusion of majority carriers across the junction. (C) Migration of minority carriers across the junction. (D) Flow of drift current.
Last Answer : (B) Diffusion of majority carriers across the junction.
Description : Draw symbol of NPN and PNP transistors.
Last Answer : symbol of NPN and PNP transistors
Description : The part of transistor which is heavily doped to produce a large number of majority carriers is –
Last Answer : Emitter
Description : The part of transistor which is heavily doped to produce a large number of majority carriers is
Description : What are the majority current carriers in a PNP transistor?
Last Answer : Holes.
Description : The emitter of a transistor is doped the heaviest because it: (a) Acts as a supplier of charge carriers (b) Dissipates maximum power c) has a large resistance (d) has a small resistance
Last Answer : (a) Acts as a supplier of charge carriers
Description : A part of transistor which is heavily doped to produce large number of majority carriers is (a) Emitter (b) Base (c) Collector (d) any of above
Last Answer : (a) Emitter
Description : A thin P-type silicon sample is uniformly illuminated with light which generates excess carriers. The recombination rate is directly proportional to (A) the minority carrier mobility (B ... lifetime (C) the majority carrier concentration (D) the excess minority carrier concentration
Last Answer : A thin P-type silicon sample is uniformly illuminated with light which generates excess carriers. The recombination rate is directly proportional to the excess minority carrier concentration
Description : In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: (1) 10 µA (2) 100 µA (3) 1 A (4) 10 A
Last Answer : In the common–emitter transistor circuit, if the current gain is 100 and the collector current is 10 mA, the base current is: 100 µA
Description : The set of transistor characteristics which enable α to be determined directly from the slope is (a) CB transfer characteristics (b) CE transfer characteristics (c) CB input characteristics (d) CE output characteristics
Last Answer : The common base transfer characteristics
Description : In a transistor Colpitts oscillator, C1 = 0.001 µF, C2 = 0.01 µF and L = 5 µH. The frequency of oscillation in MHz will be (a) 2.37 MHz (b) 10.00 MHz (c) 11.54 MHz (d) 9.09 MHz
Last Answer : c
Description : A transistor has a typical value of β = 200 , If the collector current is 15 mA, then base current will be
Last Answer : A transistor has a typical value of β = 200 , If the collector current is 15 mA, then base current will be 0.075 mA
Description : Beta cut-off frequency of a transistor is the frequency at which the Beta is • 0.707 of low frequency value • Zero • Equal to low frequency value • None of the above.
Last Answer : Beta cut-off frequency of a transistor is the frequency at which the Beta is 0.707 of low frequency value
Description : If a transistor were operated with emitter and collector interchanged, then 1 .emitter current will increase 2. Collector current will increase 3. Base current will decrease 4. No current flow will take place
Last Answer : If a transistor were operated with emitter and collector interchanged, then Collector current will increase
Description : In a transistor 1. Emitter is heavily doped while the collector is moderately doped 2. Collector base junction is forward biased 3. Emitter is made wider than collector 4. The input resistance is much higher than output resistance
Last Answer : In a transistor Emitter is heavily doped while the collector is moderately doped
Description : A transistor has ________ number of terminals. (A) 2 (B) 3 (C) 1 (D) 4
Last Answer : A transistor has 3 number of terminals.
Description : ICB0 in a transistor can be reduced by reducing: (1) IB (2) VCC (3) IE (4) Temperature
Last Answer : ICB0 in a transistor can be reduced by reducing: Temperature.
Last Answer : A Transistor has Two PN junctions
Last Answer : The most commonly used transistor circuit arrangement Common emitter
Last Answer : The function of Transistor is to do Amplification
Last Answer : A FET is a Bi-polar transistor
Last Answer : The encapsulation of transistor is necessary for mechanical ruggedness.
Last Answer : In a transistor leakage current mainly depends on temperature.
Last Answer : When a transistor is connected in common emitter mode, it with have medium input resistance and high output resistance.
Description : What is the main use of a transistor?
Last Answer : Main use of a transistor as amplifier and as switch.
Description : can transistor amplify dc?
Last Answer : No
Description : A triac thyristor functions as a control device and is basically ________________. A. two NPN transistors in parallel with a common base lead B. a diode in series with a temperature sensitive capacitor C. two ... -back SCR's with a common gate lead D. a triode tube with an extra heavy grid element
Last Answer : Answer: C
Description : An important characteristic of the device shown in figure 'B' of the illustration as compared with conventional NPN or PNP transistors is its ____________. EL-0065 A. higher temperature sensitivity B. higher power ratings C. very high input resistance D. all of the above
Description : What is the primary difference between the NPN and PNP amplifiers?
Last Answer : The polarity of the source voltage
Description : What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?
Last Answer : Negative
Description : Draw the construction of BJT (NPN) and explain its working principle. State and explain different operating regions.
Last Answer : Construction of BJT (NPN): Working of NPN Transistor : The circuit diagram of the NPN transistor is shown in the figure below. The forward biased is applied across the emitter-base ... Zero with input current is Zero transistor in cut off. In this region transistor act as open switch
Description : Most of the transistors are NPN type and not PNP type because 1.NPN transistor gives large voltage gain 2.NPN transistors are more negative than PNP transistors 3.In NPN transistor, the current ... free electrons which are less mobiles than holes 4.We can have high conduction is NPN transistors
Last Answer : Most of the transistors are NPN type and not PNP type because We can have high conduction is NPN transistors
Description : When troubleshooting a console circuit card which is suspected of being faulty, the first step would be to _____. A. pull the card and measure the value of all resistors B. check for the ... for burned components D. check for continuity of circuit board traces and then the gain of each transistor
Last Answer : Answer: C
Description : What is your opinion on creating/supporting more minority owned businesses?
Last Answer : Imagine we are going to play Monopoly. At the beginning of the game, it is decided by a roll of the dice that one player will be unable to buy property for their first 5 trips around the board. ... they are able to buy property or get jobs, they are so far behind most find it impossible to compete.