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

1 Answer

Answer :

(a) Acts as a supplier of charge carriers

Related questions

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 : 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

Last Answer : Emitter

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 : In the transistor schematic symbol, the arrow ________ (a) located on emitter (b) located on base (c) located on collector (d) points from north to south

Last Answer : a) located on emitter

Description : The operation of a transistor requires ______ (a) Emitter is heated (b) base is heated (c) collector be heated (d) none of above

Last Answer : (d) none of above

Description : In p-n-p transistor, collector current is (a) Equal to emitter current (b) slightly less than emitter current (c) greater than emitter current (d) any of above

Last Answer : (c) greater than emitter current

Description : In n-p-n transistor, p works as ________ (a) Collector (b) emitter (c) base (d) any of above

Last Answer : c) base

Description : The central region of transistor is called (a) Base (b) emitter (c) collector (d) neutral

Last Answer : (b) emitter

Description : The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage

Last Answer : ANSWER: Y -- COLLECTOR CURRENT

Description : N-type region has majority charge carriers as (a) Holes (b) protons (c) neutrons (d) electrons

Last Answer : (d) electrons

Description : Transistors are made from (a) Plastic (b) metals (c)insulators (d) doped semiconductors

Last Answer : d) doped semiconductors

Description : A doped semiconductor is called : a) Extrinsic b) Intrinsic c) Insulator d) Conductor

Last Answer : b) Intrinsic

Description : Under ideal conditions, the collector current is (a) Equal to base current (b) Nearly equal to emitter current (c) Less than base current (d) always zero

Last Answer : (b) Nearly equal to emitter current

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 : The majority carriers in N-type substance are a) Holes b) Protons c) Neutrons d) Electrons

Last Answer : d) Electrons

Description : Metals are good conductors of electricity because they have: (a) Large number of bounded electrons (b) Small number of electrons (c) Large number of free electrons (d) Small number of free electrons

Last Answer : (c) Large number of free electrons

Description : What is the resistance of a coil which draws 10 A and dissipates 1520 W? A) 152 Ω B) 15.2 Ω C) 1.52 Ω D) None of these

Last Answer : What is the resistance of a coil which draws 10 A and dissipates 1520 W? A) 152 Ω B) 15.2 Ω C) 1.52 Ω D) None of these

Description : The fractional change in resistance per kelvin is known as, a. temperature coefficient of resistance b. coefficient of Voltage of charge c. thermal expansion d. all of above

Last Answer : a. temperature coefficient of resistance

Description : When the potential difference of 4 volt is applied across resistance, 10J energy is converted. Find the charge flows. a. 0.20 C b. 2.5C c. 5C d. 10C

Last Answer : b. 2.5C

Description : Current gain of a transistor which has collector current of 10 mA and a base current of 40 micro Ampere is: (a) 25 (b) 250 (c) 2500 (d) 25000

Last Answer : b) 250

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 : In transistor, the base region is of the order of _______ (a) 10-5 m (b) 10-2 m (c) 10-8 m (d) 10-6 m

Last Answer : d) 10-6 m

Description : Which is the most important building block of electronic devices? (a) Diode (b) p-n junction (c) transistor (d) rectifier

Last Answer : b) p-n junction

Description : A body will behave as an “ideal black body” when it acts as: a) A perfect absorber b) A perfect radiator c) A body to have absorption power equal to one d) All of the above

Last Answer : d) All of the above

Description : As shown in the illustration, which of the elements listed does the line 'B' represent in the basic schematic symbol of a PNP transistor? EL-0068 A. Base B. Emitter C. Cathode D. Collector

Last Answer : Answer: D

Description : Which of the following actions can be carried out in order to prevent thermal runaway in a transistor? A. Increase the current through the collector-base junction. B. Install a heat sink. ... point to increase collector current. D. Increase the potential difference between the emitter and the base.

Last Answer : Answer: B

Description : Which of the listed components does line 'C' represent for the transistor illustrated? EL-0068 A. Grid B. Plate C. Emitter D. Collector

Last Answer : Answer: C

Description : Which junction of the transistor in the common-emitter detector detects the modulation envelope?

Last Answer : Emitter-base junction

Description : What are the three elements of a bipolar transistor? Are they the: w) grid, plate, cathode x) suppressor, deflector, target y) energizer, controller, terminus z) emitter, base, collector

Last Answer : ANSWER: Z -- EMITTER, BASE, COLLECTOR

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 : 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 : 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 

Last Answer : When a transistor is connected in common emitter mode, it with have medium input resistance and high output resistance.

Description : In the illustration, the small battery and Rb are in the circuit to apply ________. EL-0022 A. forward bias to the emitter-base B. reverse bias to the emitter-base C. a 'reference charge' on the input capacitor D. a buffer between the input ground and the emitter ground

Last Answer : Answer: A

Description : Which of the following series combinations of resistors dissipates the most power when connected across a 120 V source? A. One, 220Ω resistor B. Two, 220Ω resistors C. Three, 220Ω resistors D. Four, 220Ω resistors

Last Answer : Which of the following series combinations of resistors dissipates the most power when connected across a 120 V source?  One, 220Ω resistor

Description : When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.

Last Answer : (A) acquire negative charge.

Description : What are the majority current carriers in a PNP transistor?

Last Answer : Holes.

Description : In an npn transistor, _____ are the minority carriers.   (a) Free electrons (b) Acceptor ions (c) Donor ions (d) Holes

Last Answer : In an npn transistor, Holes are the minority carriers.

Description : The claddingwhichsurroundsthe fiber core a. is used to reduce optical interference b. is used to protect the fiber c. acts to help guide the light in the core d. ensures that the refractive index remains constant

Last Answer : c. acts to help guide the light in the core

Description : Anungrounded antennanearthe ground a. acts as a single antenna of twice the height b. is unlikely to need a ground screen c. acts as anantennaarray d. must be horizontally polarized

Last Answer : c. acts as anantennaarray

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 : A magnetic field acts on a charged particles so as to change its: a. speed b. energy c. direction of motion d. all of these

Last Answer : Only direction of motion will change ...it means velocity will change but speed same

Description : The operational amplifier is _______ (a) High gain amplifier (b) high power amplifier (c)high resistance amplifier (d)low resistance amplifier

Last Answer : a) High gain amplifier

Description : When an alternating current passes through an ohmic resistance the electrical power converted into heat is?

Last Answer : When an alternating current passes through an ohmic resistance the electrical power converted into heat is true power.

Description : Does your electricity provider charge a fee for buying power from another supplier?

Last Answer : answer:Mine doesn't. I live in an area served by an EMC (non-profit, electricity membership cooperative). We don't have any choice of energy delivery-the EMC is acts under certain rules (presumably ... But look, large corporations are scum. They cheat you and lie about it. Why are you surprised?

Description : How the heat dissipates in a transformer?

Last Answer : The heat dissipation of a transformer occurs by convection, conduction and radiation.

Description :  With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals?

Last Answer : Power is the only thing which is additive in both connection whether it is parallel or series connection so total power consumed will addition of all individual power =20+20+20 = 60 watt

Description : Which one of the following quantities is conserved in pair production? a) Energy b) Charge c) Linear momentum d) All

Last Answer : d) All