Transformer coupling is used in class A amplifier to make it : - 

a) more efficient b) less bulky c) less costly d) distortion free

1 Answer

Answer :

Transformer coupling is used in class A amplifier to make it : - more efficient

Related questions

Description : One advantage of transformer coupling in transistor amplifier is that:  (1) it provides excellent frequency response (2) It is simple and less expensive than others (3) Low power supply may be used (4) High efficiency and high power output is obtained.

Last Answer : One advantage of transformer coupling in transistor amplifier is that: High efficiency and high power output is obtained.

Description : A basic S -R flip-flop can be constructed by cross -coupling which basic logic gates : - a) AND or OR gates b) XOR or XNOR gates c) NOR or NAND gates d) AND or NOR gates

Last Answer : A basic S -R flip-flop can be constructed by cross -coupling which basic logic gates : - NOR or NAND gates

Description : An amplifier has a voltage gain of 50; this gain in dB will be (A) 34 dB (B) 68 dB (C) 41 dB (D) 14 dB 

Last Answer : An amplifier has a voltage gain of 50; this gain in dB will be 34 dB

Description : What is Amplifier Coupling ?

Last Answer : Amplifier coupling is the process of connecting the output of one amplifier stage to the input of another amplifier stage to amplify the weak signal in phases. Couplings are used to gain more or less.

Description : In the illustrated circuit, one advantage of the capacitor coupling over direct coupling is ____________. EL-0048 A. as the frequency decreased the capacitive reactance (Xc) increases B. the amplifier becomes ... of the signal while it isolates the biasing of each stage. D. good frequency response.

Last Answer : Answer: C

Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling

Last Answer : A) Wave traps in each stage

Description : In a resistance loaded, RC coupled amplifier the dc component is blocked by A) Load resistance RL B) Coupling capacitor, CC C) RB D) The transistor.

Last Answer : B) Coupling capacitor, CC

Description : The Bandwidth of an RC-coupled amplifier is limited by: A) coupling capacitors at the low frequency end and bypass capacitors at the high frequency end B) coupling capacitors at the high frequency ... at the low frequency end and bypass as well as coupling capacitors at the high frequency end.

Last Answer : C) bypass and coupling capacitors at the low frequency end and shunt capacitors at the high frequency end and

Description : What is the most common form of coupling for an rf amplifier?

Last Answer : Transformer coupling.

Description : If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Last Answer : A step-down transformer.

Description : What type coupling would be most useful for an audio amplifier between the first and second stages?

Last Answer : RC coupling.

Description : What type coupling is usually used to couple the output from a power amplifier?

Last Answer : Transformer coupling.

Description : What are four methods of coupling amplifier stages?

Last Answer : Direct, RC, impedance, and transformer coupling.

Description : What is the purpose of an amplifier-coupling network?

Last Answer : To transfer energy (a signal) from one stage to another.

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

Last 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 : State the need and types of amplifier coupling. 

Last Answer : Need of amplifier coupling: 1.When ever large amplifier with very good impedance matching is required, a signal stage amplifier circuit will not able to amplify the signal to a large extent. 2 ... 2.Transformer coupled amplifier 3.Direct coupled amplifier 4. Inductance (LC) coupling

Description : List the types of coupling used in BJT amplifier. 

Last Answer : Types of coupling used in BJT amplifier: i. Resistance capacitance (RC)coupling ii. Impedance coupling iii. Transformer coupling iv. Direct coupling

Description : Give the different types of amplifier coupling.

Last Answer : 1. Resistance – capacitance (RC) coupling.  2. Inductance (LC) coupling.  3. Transformer coupling (TC)  4. Direct coupling (D.C.)

Description : The purpose of a coupling capacitor in an amplifier is to:  (1) Control the output (2) Provide impedance matching (3) Provide DC isolation between amplifier and load (4) W Increase the bandwidth

Last Answer : The purpose of a coupling capacitor in an amplifier is to: Provide DC isolation between amplifier and load.

Last Answer : For an amplifier, the coupling method which gives the highest gain is Transformer coupling.

Description : The voltage at the reference electrode of the circuit shown in the illustration is applied to the input of a/an ______________. EL-0090 A. class A detector whose output drives an ... drives an 2-stage isolation transformer D. magnetic amplifier whose output controls a saturable reactor

Last Answer : Answer: D

Description : Which of the following circuit would be preferred for a 455 kHz IF amplifier? A) A resistance loaded B) Double tuned transformer C) Video amplifier D) Class C

Last Answer : B) Double tuned transformer

Description : What is the line current of a circuit when the current transformer of 1000 : 5 rating measures 4 amp? (A) 5000 amp (B) 1000 amp (C) 400 amp (D) 800 amp 

Last Answer : What is the line current of a circuit when the current transformer of 1000 : 5 rating measures 4 amp? (A) 5000 amp (B) 1000 amp (C) 400 amp (D) 800 amp 

Description : In a transformer, with closed magnetic coupling between primary and secondary __ will improve: a) Efficiency b) All day efficiency c) Regulation d) None of the above

Last Answer : Ans: C

Description : The transistors in the illustrated circuit are connected using what type of coupling? EL-0049 A. RC coupling B. transformer coupling C. LC coupling D. direct coupling

Last Answer : Answer: B

Description : The transistors in the illustrated circuit are connected using what type of coupling? EL-0048 A. RC coupling B. transformer coupling C. LC coupling D. direct coupling

Last Answer : Answer: A

Description : The transistors in the illustrated circuit are connected using what type of coupling? EL-0051 A. RC coupling B. transformer coupling C. impedance coupling D. direct coupling

Last Answer : Answer: D

Description : The transistors in the illustrated circuit are connected using what type of coupling? EL-0050 A. RC coupling B. transformer coupling C. Impedance coupling D. direct coupling

Last Answer : Answer: C

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Last Answer : The problem of Electro-static coupling in a transformer is acute at High frequencies.

Description : Transformer coupling introduces which type of distortion?

Last Answer : Transformer coupling introduces Cross over distortion.

Description : The diagram shown in the illustration represents a/an _____________. EL-0082 A. stepup transformer B. magnetic amplifier C. autotransformer D. Scott-connected transformer

Last Answer : Answer: A

Description : In the illustrated electronic governor, the circuit card connected to the potential and current transformers is for ________. EL-0046 A. increasing the signal strength to the governor to ... from motorization D. conditioning the load through the use of a magnetic amplifier current transformer

Last Answer : Answer: A

Description : What can be used to replace the exciter in the circuit shown in the illustration? EL-0101 A. A step-up transformer. B. A rectifier. C. A step-down transformer. D. An operational amplifier.

Last Answer : Answer: B

Description : Figure 'A' of the diagram shown in the illustration represents a ______________. EL-0092 A. differential transformer B. saturable reactor C. synchro system D. magnetic amplifier

Last Answer : Answer: C

Description : Figure 'B' shown in the illustration represents a/an ____________. EL-0091 A. magnetic amplifier B. Scott-T transformer C. saturable-core reactor D. oil-filled toroid

Last Answer : Answer: A

Description : Figure 'A' shown in the illustration represents a/an _______________. EL-0091 A. magnetic amplifier B. Scott-T transformer C. saturable-core reactor D. oil-filled toroid

Last Answer : Answer: C

Description : What problem is caused in an rf amplifier by a loosely coupled transformer?

Last Answer : A too-narrow bandpass.

Description :  transformer coupled amplifier

Last Answer :  transformer coupled amplifier

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

Last 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 : In an IF amplifier, the IF transformer is provided with tapping to  (a) increase the voltage gain (b) increase the bandwidth of the resonance circuit (c) increase the impedance ... resonance circuit to the following cascaded amplifier (d) increase the quality factor of the resonance circuit 

Last Answer : In an IF amplifier, the IF transformer is provided with tapping to increase the voltage gain

Description : The main function of the transformer used in the output of a power amplifier is  (A) To step up the voltage  (B) to increase the voltage gain  (C) to safeguard the transistor against overheating  (D) to match the load impedance with dynamic output resistance of the transistor

Last Answer : The main function of the transformer used in the output of a power amplifier is to match the load impedance with dynamic output resistance of the transistor

Last Answer : As compared to an amplifier, a transformer cannot Increase the output Power

Description : Explain the following with the help of an example (i) Common coupling (ii) Communicational cohesion (iii) Class diagram (iv) Structure chart

Last Answer : Ans. (i) Common coupling: Common coupling is when two modules share the same global data (e.g. a global variable). Changing the shared resource implies changing all the modules using it ... Whether each identifiable function is a manageable entity or should be broken down into smaller components.

Description : The circuit shown in the illustration functions as a ____________. EL-0087 A. pulse trigger circuit for an operational amplifier B. three stage, high gain class 'A' amplifier C. binary ripple counter or shift register D. free running multivibrator

Last Answer : Answer: C

Description : Determine the lower half-power frequency of a class-C amplifier having upper half-power frequency of 10.025 MHz, a resonant frequency 5 MHz and a circuit Q of 10. A. 1.0025 MHz B. 10.525 MHz C. 0.5 MHz D. 10 MHz

Last Answer : A. 1.0025 MHz

Description : Best describe as an amplifier used in radio telephony. A. Magnifier B. Class B C. Class C D. Class A

Last Answer : C. Class C

Description : How can intermodulation interference between two transmitters in close proximity reduced or eliminated? A. Through installing a band-pass filter in the antenna feed line B. Through installing terminated circulator ... high driving power D. By installing a low-pass filter in the antenna feed line

Last Answer : A. Through installing a band-pass filter in the antenna feed line

Description : The final power amplifier in an FM transmitter usually operates class ______. A. AB B. C C. B D. A

Last Answer : B. C