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the RC coupled amplifier are using the following applications first in public address amplifier system

 tape recorders TV VCR and CD players stereo amplifier 

and these are the voltage amplification amplifiers
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Description : Draw circuit diagram of two stage RC coupled amplifier using BJT

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

Description :  applications of RC coupled amplifier

Answer : Applications of RC coupled amplifier: (i) Widely used as Voltage amplifiers. (ii) They are used in Public Address System. (iii) In Tape recorders. (iv) In stereo amplifiers (v) In T.V. V.C.R. and C.D. Players.

Description : advantages and disadvantages of direct coupled amplifier over RC coupled amplifier. 

Answer : Advantages:  Due to absence of coupling capacitors, the gain does not reduce on the lower frequency side.  This amplifier can amplify dc signals. Reduced cost and complexity due to absence of ...   The output waveform has a dc shift.  Poor frequency response at a higher frequency.

Description : Compare RC coupled, transformer coupled and direct coupled amplifier based on four points.

Answer : Parameter RC coupled Transformer coupled Direct coupled  Coupling element Resistor and capacitor Transformer No element Impedance matching Poor Excellent good Frequency ... Low frequency amplifier,opamp Size and cost small Large and bulky least

Description : Draw the single stage RC coupled amplifier circuit and explain its’s operation.

Answer : Operation:- The capacitors C1 and C2 are called as the coupling capacitors. As the load resistor RL (not shown in the diagram) is coupled to the amplifier through the coupling capacitor ... connected in the common emitter (CE) configuration. Therefore, this amplifier is called CE amplifier. 

Description : List the advantages of RC coupled amplifier.

Answer : Advantages: 1. The frequency response is excellent 2. The circuit is very compact and extremely light 3. Cost is low because it employ resistors and capacitors which are cheap 

Description : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is  (A) The transistor itself  (B) the power supply Vcc  (C) the coupling capacitor Cc  (D) the biasing resistors

Answer : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is The transistor itself 

Description : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is  (A) The active device itself (tube, or transistor)  (B) stray shunt capacitance Cs  (C) the grid leak resistance Rg  (D) coupling capacitor Cc

Answer : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is coupling capacitor Cc

Description : The upper cut off frequency of a capacitive coupled RC amplifier is decided by  A) Input Coupling capacitance B) Transistor internal capacitances C) Output coupling capacitance D) Bypass capacitance

Description : Bandwidth of an RC coupled amplifier is 100 kHz. Two such amplifiers are connected in cascade.Resultant bandwidth(in kHz) is around  A) 200 B) 100 C) 60 D) 30

Answer : as we knowthat capacitor only allow AC current Rs components grounded that components which are coming in the DC form we have to use capacitor capacitor only pass the AC components which have to be amplifier

Description :  transformer coupled amplifier

Answer :  transformer coupled amplifier

Description : State the need of multistage amplifier. Draw frequency response of R-C coupled amplifier.

Answer : The need of multistage amplifier The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in ... to use a MULTISTAGE AMPLIFIER .  Frequency response of R-C coupled amplifier.

Description : State the need of cascade amplifier and draw circuit diagram of 2-stage direct coupled amplifier.

Answer : Need:- The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in order to obtain greater voltage and power gain, cascade amplifiers are used.

Description : For a symmetrical emitter coupled differential amplifier using transistors of current gain 100, constant current source of 2 mA and with Vcc=10 V, differential input resistance in kOhm is about  A) 2.5 B) 5 C) 10 D) 50

Answer : The output stage of a practical amplifier is always Transformer coupled

Description : Draw the multistage amplifier circuit diagram using RC coupling. State its advantages.

Answer : Advantages: 1. It has a wide frequency response. 2. For coupling the resistor and the capacitor are used and which are not expensive so the cost is low. 3. The circuit is very ... a wide frequency band. 5. It is high fidelity amplifier. 6. It provides less frequency distortion.

Description : What is the use of differential amplifier?

Answer : it is the kircjohoffs Voltage law it can be defined as stated that the summation of applied voltage in loop which follows Ohm's law is equal to the voltage drop in the circuit

Answer : It is an operating point of transistor.which gives the information of transistor In which region is working

Answer : Q pointit is nothing but operating point of transistor which can gives the information about the transistor working in active cutoff or saturation region to the Faithful amplification we have to ... of proper collector emitter voltage during the passage of signal is known as transistor biasing

Answer : The operating point of devices is known as Q point (quiescent point) Q point are the values of voltages and currents of a circuit when no signal is present.

Answer : the main components of the circuit are as follows register capacitor an inductor and the supply voltage our current source.

Description : What is the time constant of an RC series circuit?  (A) R/C (B) C/R (C) 1/RC (D) RC

Description : What is the nature of supply current in parallel RC circuit with reference to the voltage?  (A) In phase (B) Lags by 90 degree (C) Leads by 90 degree (D) Compensates and becomes zero 

Description : A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.

Answer : ANSWER: 4 MILES PER HOUR

Description : By emotional maturity is meant a Options: A) Low degree of sensitivity coupled with a high level of intellectual growth B) Extreme patience or sympathy towards problems involving other people C) Lack of ... other people D) Lack of control or inhibition of the emotions appropriate to one's age-group

Answer : D) Lack of control or inhibition of the emotions appropriate to one's age-group 

Description : The distributed system is a collection of (P) and communication is achieved in distributed system by (Q) , where (P) and (Q) are : (A) Loosely coupled hardware on tightly ... message passing ,respectively. (D) Loosely coupled software on tightly coupled hardware and file sharing, respectively.

Answer : (C) Tightly coupled software on loosely coupled hardware and message passing ,respectively. 

Description : Distributed operating systems consist of: (1) Loosely coupled O.S. software on a loosely coupled hardware (2) Loosely coupled O.S. software on a tightly coupled hardware (3) Tightly coupled O.S. software on a loosely coupled hardware (4) Tightly coupled O.S. software on a tightly coupled hardware

Answer : Answer: 3

Description : Describe Effect of misalignment of direct coupled drives.

Answer : Following are the effects of misalignment of direct coupled drives:- 1. There will be excess vibrations. 2. Increase in noise level. 3. Increases in friction loss. 4. The shaft will bent. 5. There ... stresses on coupling & shaft. 13. Early wear & tear of both driving & driven machine.

Description : Mutual inductance between two magnetically coupled coils depends on (a) number of turns only (b) permeability of the core only (c) cross-sectional area of their common core only (d) All of the above 

Description : A separately excited d.c. machine is coupled to a 50 Hz, three-phase, 4-pole induction machine as shown in the figure. The Dc machine is energized first and the machines rotate at 1 600 ... three phase source, the phase sequence being consistent with the direction of rotation. In steady state

Answer : A separately excited d.c. machine is coupled to a 50 Hz, three-phase, 4-pole induction machine as shown in the figure. The Dc machine is energized first and the machines rotate at 1 600 1pm. ... rotation. In steady state DC machine acts as a motor and the induction machine acts as a generator  

Description : To conduct load test on a dc shunt motor, it is coupled to a generator which is identical to the motor. The field of the generator is also connected to the same supply source as the motor. The armature of generator is ... value of this load resistance is  (A) 1.0 (B) 0.98 (C) 0.96 (D) 0.94

Answer : To conduct load test on a dc shunt motor, it is coupled to a generator which is identical to the motor. The field of the generator is also connected to the same supply source as the motor. ... obtain rated armature current in both motor and generator. The p.u value of this load resistance is 0.96

Answer : Amplifiers are coupled to Increase gain

Answer : An alternator coupled to a hydraulic turbine runs at slow speed, as compared to others.

Description : Explain DC coupled drive circuit with unipolar output.

Answer : DC coupled drive circuit with unipolar output: The figure shows the circuit and waveforms

Description : State the condition for RC differentiator. Draw the output waveform of RC integrator for square wave input.

Answer : Condition for RC differentiator: If the time duration T of the input waveform is comparable with the RC time constant (product of R and C) then the output waveform of the differentiator gets distorted. Hence for proper differentiator the condition is as follows: T >>RC

Description : Draw RC differentiator circuit.

Answer : RC differentiator circuit :

Description : With the help of circuit diagram and waveforms, explain working of RC differentiator.

Answer : Fig: RC differentiating circuit Figure shows a RC differential circuit. It is also known as high pass filter. The reactance of a capacitor decreases with increasing frequency. The higher ... i.e. the output signal is directly proportional to the derivative of the input signal.  

Description : Compare RC integrator with RC differentiator

Answer : Compare RC integrator with RC differentiator

Description : Draw the labeled circuit of RC phase shift oscillator. State the formula for frequency of oscillator.

Answer : Frequency of oscillation is given by,

Description : Compare between RC phase shift oscillator and crystal oscillator.

Answer : RC phase shift oscillator Crystal oscillator This oscillator is used for low frequency range. Quartz crystal is mainly used in radio-frequency (RF) oscillators Used resistor and capacitor ... RC network is used as feedback network. Crystal is connected in feedback.

Description : Compare RC and LC oscillator.

Answer :  RC and LC oscillator

Description : Explain the operation of RC triggering circuit with neat diagram.

Answer : RC triggering circuit: The RC half-wave triggering circuit is as shown in the figure. During negative halfcycle of supply voltage vs, the capacitor C charges through diode D2 and load, ... be triggered at 0° & 180° because the supply voltage is zero and less than finger voltage. 

Description : List the applications of RC oscillator and crystal oscillator.

Answer : Applications of RC oscillator :  1) In AF signal generators 2) In radio transmitter & Receivers 3) Sine wave generator.  Applications of Crystal oscillator : 1) Electronic navigation systems 2) Frequency Synthesizers 3) Timing circuits (Clock) with high stability. 4) RADAR systems. 

Description : Time constant for RC circuit formula τ = RC Where, τ = time constant

Answer : Time constant for RC circuit formula τ = RC Where, τ = time constant

Description : Series rc circuits

Answer : Series rc circuits

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