In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit

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 reverse values (3) Replace all calculated currents by reverse values (4) Replace all calculated voltages and currents by reverse values 
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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 

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Related questions

PNP and NPN transistor:

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.

What is the relationship between the polarity of the voltage applied to the PNP transistor and that applied to the NPN transistor?

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

In a transistor, the conventional current flows from base to emitter. The transistor is (a) NPN (b) PNP (c) FET (d) None of these

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

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region

Description : A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for ... base-collector junction is reverse biased (D) both the base-emitter and base-collector junctions are forward biased

Last Answer : A BJT is as a power control switch by biasing it in cut-off region (OFF state) or in the saturation region (ON state). In  ON state, for BJT both the base-emitter and base- collector junctions are forward biased

Draw symbol of NPN transistor and state three configurations of transistor (BJT)

Description : Draw symbol of NPN transistor and state three configurations of transistor (BJT)

Last Answer : Configuration - Common Emitter Common Collector Common Base

What is an emitter follower BJT circuit ?

Description : What is an emitter follower BJT circuit ? (A) Common Collector Amplifier (B) Common Emitter Amplifier (C) Common Base Amplifier (D) None of the above

Last Answer : What is an emitter follower BJT circuit ? (A) Common Collector Amplifier (B) Common Emitter Amplifier (C) Common Base Amplifier (D) None of the above

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 : 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

Last Answer : Answer: C

What is the primary difference between the NPN and PNP amplifiers?

Description : What is the primary difference between the NPN and PNP amplifiers?

Last Answer : The polarity of the source voltage

Draw symbol of NPN and PNP transistors.

Description : Draw symbol of NPN and PNP transistors. 

Last Answer : symbol of NPN and PNP transistors

Most of the transistors are NPN type and not PNP type because

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 

If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be

Description :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55  

Last Answer :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98 

As compared to power MOSFET, a BJT has

Description : As compared to power MOSFET, a BJT has  (a) Lower switching losses but higher conduction losses (b) Higher switching losses and higher conduction losses (c) Higher switching losses but lower conduction losses (d) Lower switching losses and lower conduction losses. 

Last Answer : As compared to power MOSFET, a BJT has Higher switching losses but lower conduction losses 

For the active mode BJT operation (A) Emitter Base Junction is Forward Biased and Collector

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.

In BJT, the common emitter gain β is

Description : In BJT, the common emitter gain β is (A) desired to have large value (B) desired to have small value (C) desired to have moderate value (D) the value need not be controlled

Last Answer : In BJT, the common emitter gain β is desired to have large value.  β is the Current gain factor also called transport factor. 

In BJT circuits, bulk of the gain is provided by

Description : In BJT circuits, bulk of the gain is provided by (A) CE configuration (B) CB configuration (C) CC configuration (D) It is not certain

Last Answer : In BJT circuits, bulk of the gain is provided by CE configuration

What is the difference between BJT and FET?

Description : What is the difference between BJT and FET?

Last Answer : BJT  is  a  current  opperated   transistor  while  FET   is  a  field   opperated  transistor.

What is a BJT amplifier?

Description : What is a BJT amplifier?

Last Answer : Bilpolar Juntion transistor , this fuction is control the current

Draw the construction of BJT (NPN) and explain its working principle. State and explain different operating regions.

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

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

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

What are the majority current carriers in a PNP transistor?

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

Last Answer : Holes.

Explain the operating principle of PNP transistor.

Description : Explain the operating principle of PNP transistor. 

Last Answer : The circuit connection of PNP transistor with supply voltages is as shown above. The emitter-base junction is connected as forward bias. Due to this the emitter pushes the holes from the P ... by the collector. This develops the collector current IC. This is how a PNP transistor operates. 

A “PNP” transistor is made of

Last Answer : A “PNP” transistor is made of Either Ge (or) Si

When an NPN transistor is saturated its Vce?

Description : When an NPN transistor is saturated its Vce?

Last Answer : is zero

Which of the symbols shown in the illustration represents an NPN type transistor? EL-0078 A. A B. B C. C D. D

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

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 input signal C) Need for high dc collector supply D) Clipping of output in the negative half of the input signal

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

What percentage of current in an NPN transistor reaches the collector?

Description : What percentage of current in an NPN transistor reaches the collector?

Last Answer : 98 percent.

In the NPN transistor, what section is made very thin compared with the other two sections?

Description : In the NPN transistor, what section is made very thin compared with the other two sections?

Last Answer : The P or base section.

To properly bias an NPN transistor, what polarity voltage is applied to the collector, and what is its relationship to the base voltage?

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.

In which direction does the arrow point on an NPN transistor?

Description : In which direction does the arrow point on an NPN transistor?

Last Answer : Outward.

With neat diagram explain working of NPN transistor.

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.

When an NPN transistor is properly biased then most of the electrons from the emitter

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

In an npn transistor, _____ are the minority carriers.

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.

State reason BJT is called as bipolar junction transistor.

Description : State reason BJT is called as bipolar junction transistor.

Last Answer : BJT is called bipolar junction transistor because in BJT current conduction takes place due to majority as well as minority charge carriers.

What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?

Description : What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?

Last Answer : Negative

This invention replaced vacuum tubes and made computers much smaller and faster. However, it was eventually replaced by another invention (i) RAM (ii) ENIAC (iii) Transformer (iv) Transistor.

Description : This invention replaced vacuum tubes and made computers much smaller and faster. However, it was eventually replaced by another invention (i) RAM (ii) ENIAC (iii) Transformer (iv) Transistor.

Last Answer : (iv) Transistor.

A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf

Description : A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm. The armature current is 5 A without any ripple. The armature resistance is 2 Ohm. The ... of the motor will be  (A) 339 rpm (B) 359 rpm (C) 366 rpm (D) 386 rpm

Last Answer : 359

Draw circuit diagram of two stage RC coupled amplifier using BJT

Description : Draw circuit diagram of two stage RC coupled amplifier using BJT

Last Answer : BJT - To amplify input signal. R1 & R2 = Biasing resistor to provide DC biasing voltage RE = Emitter resistor to control gain RL = Load resistor to carry load current Cin = Cout = Coupling capacitors to block DC CE = emitter bypass resistor

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

Description : Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

Last Answer : Two advantages of voltage divider biasing of BJT. 1. It is very simple method of transistor biasing. 2. The biasing conditions can be very easily set. 3. there is no loading of ... 5. The resistor RE introduces a negative feedback. So all the advantages of negative feedback are obtained. 

Explain open emitter BJT drive circuit.

Description : Explain open emitter BJT drive circuit.

Last Answer : open emitter BJT drive circuit:

What is the full form of 'PnP' ? -How To ?

Description : What is the full form of 'PnP' ? -How To ?

Last Answer : The full form of 'PnP' is Plug and Play

What is the full form of PnP ?

Last Answer : Plug 'n Play

As shown in the illustration, which electrical symbol represents a PNP type semiconductor? EL-0065 A. A B. B C. C D. D

Description : As shown in the illustration, which electrical symbol represents a PNP type semiconductor? EL-0065 A. A B. B C. C D. D

Last Answer : Answer: C

Which of the following statements correctly applies to transistors? A. NDN and PNP are the two basic types of transistors. B. The three terminals are called the emitter, base, and collector. C. The emitter separates the base and collector. D. The collector separates the emitter and base.

Description : Which of the following statements correctly applies to transistors? A. NDN and PNP are the two basic types of transistors. B. The three terminals are called the emitter, base, and collector. C. The emitter separates the base and collector. D. The collector separates the emitter and base.

Last Answer : Answer: B

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-to-back SCR's with a common gate lead D. a triode tube with an extra heavy grid element

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

An integrated circuit is A) A complicated circuit B) An integrating device C) Much costlier than a single transistor D) Fabricated on a tiny silicon chip

Description : An integrated circuit is A) A complicated circuit B) An integrating device C) Much costlier than a single transistor D) Fabricated on a tiny silicon chip

Last Answer : Answer : D

Which one among the following components can not be developed within an "integrated circuit"? (1) Diode (2) Triode (3) Transformer (4) Transistor

Description : Which one among the following components can not be developed within an "integrated circuit"? (1) Diode (2) Triode (3) Transformer (4) Transistor

Last Answer : (3) Transformer Explanation: Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be ... circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.

In a logic circuit the NOR and NAND gate functions ____________. A. must be accomplished with a common base transistor arrangement B. are available in diode form C. are exact opposites with the same NOR and NAND inputs D. have output conditions that are exact opposites to the output condition for OR and AND, respectively

Description : In a logic circuit the NOR and NAND gate functions ____________. A. must be accomplished with a common base transistor arrangement B. are available in diode form C. are exact opposites with the ... . have output conditions that are exact opposites to the output condition for OR and AND, respectively

Last Answer : Answer: D

In a logic circuit, the NOT gate function _____________. A. does not alter a logical input B. serves to amplify a given signal level C. must be accomplished with a common collector transistor arrangement D. reverses an input logic condition

Description : In a logic circuit, the NOT gate function _____________. A. does not alter a logical input B. serves to amplify a given signal level C. must be accomplished with a common collector transistor arrangement D. reverses an input logic condition

Last Answer : Answer: D

When troubleshooting a console circuit card suspected of being faulty, first check operating voltages, clean the card and then _________________. A. make sure wired connections and push-on connectors are tight B. test each resistor and capacitor on the card with an ohmmeter C. check the continuity of all printed circuit traces with an ohmmeter D. measure the gain of each transistor or integrated circuit

Description : When troubleshooting a console circuit card suspected of being faulty, first check operating voltages, clean the card and then _________________. A. make sure wired connections and push-on connectors ... circuit traces with an ohmmeter D. measure the gain of each transistor or integrated circuit

Last Answer : Answer: A

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 correct value and polarity of all power connections to the card C. de-energize and pull the card to visually inspect for burned components D. check for continuity of circuit board traces and then the gain of each transistor

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