Draw the diagram of transistor operating regions

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diagram of transistor operating regions

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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 : Explain with neat diagram how transistor can be used as a switch.

Last Answer : In Bipolar Transistor as a Switch the biasing of the transistor, either NPN or PNP is arranged to operate the transistor at both sides of the I-V characteristics curves. The areas ... possible and maximum current flowing through the transistor. Therefore the transistor is switched Fully-ON .

Description : Describe the operation of transistor as a switch with suitable diagram.

Last Answer : In Bipolar Transistor as a Switch the biasing of the transistor, either NPN or PNP is arranged to operate the transistor at both sides of the I-V characteristics curves. The areas of operation for a transistor ... . OR Open switch Table indicating transistor as switch

Description : Draw the circuit diagram and describe the working principle of full wave bridge rectifier. Draw its waveforms. 

Last Answer : During the first half cycle : During the first half cycle of the input voltage, the upper end of the transformer secondary winding is positive with respect to the lower end. Thus during the first ... , terminal D, diode D4, and terminal A back to transformer and output will positive half cycle.

Description : (i) Draw the time domain and frequency domain representation of sine wave and triangular wave. (ii) Define frequency and wavelength.

Last Answer : (i)Time domain and frequency domain representation of sine wave time domain and frequency domain representation of triangular wave.   ii) Define frequency and wavelength. Frequency ... : Wavelength can be defined as the distance between two successive crests troughs of a wave. 

Description : Define filter. State its types. Draw any one filter with input and output waveform.

Last Answer : Defination : Filter is a circuit which remove or filtered out the AC component (ripple) Types of filter 1. Shunt Capacitor filter (C filter) 2. Series Inductor filter (L filter) 3. LC filter 4. filter (CLC filter) Shunt Capacitor filter (C filter) OR Waveforms:

Description : Describe the operation of inductor with sinusoidal AC voltage as input. Draw waveform for voltage across and current through the inductor. Draw its phasor representation.

Last Answer : An alternating voltage is applied to a purely inductive coil, a back e.m.f. is produced due to self-inductance of the coil. The back e.m.f. at every step, opposes the rise of fall of current through the coil ... drop, the applied voltage has to overcome this self induced e.m.f. only.

Description : Draw and describe power triangle. State its significance.

Last Answer :  Power Triangle:   OR   Power Triangle is a right angled triangle whose sides represent the active, reactive and apparent power. It is obtained by multiplying the circuit current I ... loss due to different load. This is very important for designing the energy efficient electrical system. 

Description : Explain the working of Half wave rectifier with suitable diagram

Last Answer : The half-wave rectifier circuit using a semiconductor diode (D) with a load resistance RL but no smoothing filter is given in the figure. The diode is connected in series with the secondary of the ... . Since only half-cycles of the input wave are used, it is called a half wave rectifier. 

Description : Explain with circuit diagram operation of zener diode as a voltage regulator.

Last Answer : The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load ... V0 = VZ is obtained across RL, whenever the input voltage remains within a minimum and maximum voltage.

Description : Explain Zener diode as voltage regulator. 

Last Answer : Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. By passing a small current through the diode from a voltage source, via a ... across the load in spite of variations in the input voltage or changes in the load current. 

Description : Explain the construction details of LED

Last Answer : The construction of LED differs from normal standard diode in many aspects. As shown in the figure the p-n junction of the LED bulb is enclosed by a transparent, hard plastic epoxy resin hemispherical- ... that much light. Due to this, the brightest light will be emitted at the top of the LED.

Description : (i) Discuss ideal and practical voltage source (ii) Compare CB, CC and CE configuration

Last Answer : (i) Discuss ideal and practical voltage source Ideal voltage source The ideal voltage source has a constant voltage across its terminal, irrespective of the current drawn from the source. Ideal Voltage Source have zero ... to reduce. (ii) Compare CB, CC and CE configuration

Description : Compare between active and passive components.

Last Answer : active component passive component  It is a device which amplify by producing an output signal with more power in it than that of input signal It is a device which ... bidirectional function semiconductor materials are used Non-semiconductor or semiconductor material is used

Description : Define the following with respect to BJT. (i) Input resistance (ii) Output resistance

Last Answer : Input resistance: It is the ratio of small change in emitter -to-base voltage(∆VEB) to the resulting change in emitter current (∆IE) for a constant collector to base voltage(VCB) ... of BJT is ratio of voltage between output terminal and common terminal to current through output terminal. 

Description : Define α. Give the relationship between α and β.

Last Answer : Alpha (α )– It is ratio of collector current IC to emitter current IE of a transistor.

Description : State the need for filter circuits in power supply.

Last Answer : Ripple must be kept away from the load and it should be removed from the rectified output. Therefore , there is a necessity of filter circuit for removing i.e. smoothing or filtering the ripple and allowing the (pure or steady) d.c. voltage to reach the load.

Description : Define active components. Give two examples. 

Last Answer : The component which requires power supply for its operation is called as Active component. e.g. Diode, Transistor, ICs, SCRs. OR Active Component: The component which rely on source of ... is called active component example diode , transistor, FET, and so on. They are semiconductor component

Description : State the different types of transformers. Describe the construction and general principle of transformer.

Last Answer : Different types of transformer are core type shell type Berry type Construction of transformer: OR Shell Type construction can be consider for diagram Transformer ... is based on the principle of mutual induction between two circuits linked by a common magnetic field. 

Description : Describe the construction and working principle of single phase AC motor.

Last Answer : construction and working principle of single phase AC motor : Single phase induction motors have a phase distributed winding on the stator and a squirrel cage short-circuited winding on the rotor. ... is the basic working principle of induction motor of either type, single phase of 3 phase.

Description : Describe the construction and working principle of auto transformer.

Last Answer : An auto transformer has single winding which is used as primary and secondary winding. This winding is wound on laminated enameled magnetic core.   OR   As shown in fig. 1 the input is ... this construction we can step up the voltage. So this transformer known as step up autotransformer.  

Description : Define- (i) Current (ii) Potential difference

Last Answer : i) Current :- electric current is defined as the movement of electronics or flow of electronics inside the conducting material. Unit-ampere(A)  ii) Potential Difference: The difference between the ... the electrical circuit is known as potential difference between those points. Unit:- volt (V) 

Description : Write the Emf equation of transformer. State the meaning of each term in it. 

Last Answer : EMF equation of Transformer:- E1 = 4.44 f ØmN1 OR E1 = 4.44 f BmAN1 E2 = 4.44 f ØmN2 OR E2 = 4.44 f Bm AN2 Let, E1 = Primary emf E2 = Secondary emf N1= Number of turns in the primary N2 ... flux in core (wb) Bm= Flux density (wb/m2 /Tesla) A= Area of cross section of core m2 F = Frequency 

Description : State applications of single phase AC motors. 

Last Answer : Water pumps ceiling fan & air conditioners. lathe machine washing machines. Blowers Mixers & grinders Compressors Conveyers Refrigerators.

Description : Define RMS value and Average value of AC waveform.

Last Answer : 1. RMS value:- For an alternating current, the RMS value is defined as that value of steady current (DC) which produces the same heat or power as is produced by the alternating current during the ... by averaging all the instantaneous values of its wave over a period of half cycle. Iav=0.637 Imax

Description : Define self induced Emf. Write equation of self induced Emf. 

Last Answer : Definition: Self-induced emf is the e.m.f induced in the coil due to the change of flux produced by linking it with its own turns. Or Self induced emf is that which is induced in a coil, due to the change in its own current or flux. Self induced emf equation. E = - N (dΦ/dt) volts

Description : State Lenz’s law.

Last Answer : Lenz’s Law: It states that the direction of electromagnetically induced emf is such that it always opposes the main cause of its production. Or It is expressed by equation E = - N (dΦ/dt) volts Where – sign indicate the direction EMF is induced opposite to rate of change of flux. 

Description : Draw: (i) Input characteristics of transistor in CE mode. (ii) Output characteristics of transistor in CE mode and show different regions on it.

Last Answer : (i) Input characteristics of transistor in CE mode.   (ii) Output characteristics of transistor in CE mode and show different regions on it.  

Description : What are the different operating regions foe an MOS transistor?

Last Answer : _ Cutoff region _ Non- Saturated Region _ Saturated Region

Description : Draw circuit diagram of transistor reactance modulator. Explain its working.

Last Answer : Explanation- A reactance modulator is illustrated in figure. It is basically a standard commonemitter class A amplifier. Resistors R1 and R2 from a voltage divider to bias ... frequency, whereas a lower capacitance increases the frequency. The circuit produces direct frequency modulations.

Description : Draw the characteristics of tunnel diode, showing operating regions. State two applications of tunnel diode.

Last Answer : Applications: One of the important application of a tunnel diode is in high speed computers where the switching times in the order of nanoseconds or picoseconds are desirable. A tunnel diode can be ... In digital networks. 2. As a high speed switch. 3. As a high frequency oscillator.

Description : Explain about the various regions in a transistor?

Last Answer : The three regions are active region saturation region cutoff region.

Description : Write the functions of the tree regions of a transistor.

Last Answer : a) Emitter: It is of moderate size and heavily doped. It emits large number of majority carriers for the flow of current through the transistor. b) Base: It is the central region of the ... larger in size compared to emitter. It collects a major portion of majority carriers supplied by the emitter.

Description : What is a transistor? Name its three regions.

Last Answer : Transistor is the short form of transfer resistor. It is a device having three terminal semiconductor. A transistor has two ends regions called emitter and collector. The middle is called base.

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

Last Answer : Configuration - Common Emitter Common Collector Common Base

Description : Draw construction of SCR using two transistor model. Explain its operation.

Last Answer : Two Transistor Model of SCR or Thyristor

Description : Draw the V-I characteristics of power transistor. 

Last Answer : V-I characteristics of power transistor:

Description : Draw and explain self-basing of a transistor.

Last Answer : Transistor Biasing is the process of setting a transistors DC operating voltage or current conditions to the correct level so that any AC input signal can be amplified correctly by the transistor. ExplanationIt ... Applying KVL to o/p loop , Collector-emitter voltage, VCE = VCC − IC RC

Description : Figure 'A' of the diagram shown in the illustration represents a/an ____________. EL-0078 A. silicon controlled rectifier B. IG or MOS field effect transistor C. triac thyristor D. junction field effect transistor

Last Answer : Answer: B

Description : Figure 'B' of the diagram shown in the illustration represents a/an ____________. EL-0065 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG or MOS field effect transistor

Last Answer : Answer: B

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 : 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

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 : 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. 

Description : Transistor operating configurations

Last Answer : Transistor operating configurations

Description : Draw the output characteristics of BJT in CE configuration and label various regions on it.

Last Answer :  output characteristics of BJT in CE configuration 

Description : Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail. 

Last Answer : Characteristics of common emitter [CE] configuration Explanation :  (1) Active Region: In this region collector junction is reverse biased and emitter junction is forward biased. It is ... the transistor collector current is approximately given by VCC / RC and independent of base current. 

Description : Explain different tasks of regions of spiral model with diagram.

Last Answer : Traditional method or model of software development Also encompasses all the essential development phases: * Requirements analysis * Design * Code * Test * Maintenance  ... appear controllable to the customer, particularly if the customer is more accustomed to the waterfall model.

Last Answer : Active , Saturation , Cut-off region of operations in BJT.

Description : How do I draw the shear and moment diagram?

Last Answer : how can upload the pictures?