A. Keep the amplifier cool
B. Protect from rusting
C. Prevent induction due to stray magnetic fields
D. None of the above
Correct Answer: Prevent induction due to stray magnetic fields ✔
Last Updated: July 30, 2021
Related MCQs
- The output transformer used in a power amplifier is a __________ transformer?
- The pulsating d.c. applied to power amplifier causes__________?
- If the gain versus frequency curve of a transistor amplifier is not flat, then there is distortion ?
- If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is__________?
- What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?
- The driver stage usually employs__________?
- The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
- The push-pull circuit must use __________ operation?
- What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
- For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
- The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
- The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?
- Power amplifiers generally use transformer coupling because transformer permits__________?
- The most important consideration in power amplifier is __________?
- A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
- Transformer coupling can be used in__________amplifiers?
- The disadvantage of impedance matching is that it __________?
- The most costly coupling is __________ coupling?
- Class C amplifiers are used as __________?
- A class A power amplifier uses __________?
- The output stage of a multistage amplifier is also called __________-?
- Class__________ power amplifier has the highest collector efficiency ?
- The maximum efficiency of resistance loaded class A power amplifier is __________?
- __________ coupling is generally employed in power amplifiers?
- Power amplifiers handle __________ signals compare to voltage amplifiers?
- The maximum efficiency of transformer coupled class A power amplifier is __________?
- In class A operation, the operating point is generally located__________of the d.c. load line?
- The maximum collector efficiency of class B operation is __________?
- If a transistor is operated in such a way that output current flows for 60o of the input signal, then it is __________ operation?
- A class A power amplifier is sometimes called__________amplifier?
- A 2-transistor class B power amplifier is commonly called __________ amplifier?
- A power amplifier has comparatively __________ ß ?
- Low efficiency of a power amplifier results in__________?
- When a transistor is cut off __________?
- If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least__________?
- The output stage of a multistage amplifier usually employs__________?
- The size of a power transistor is made considerably large to__________?
- Class __________ operation gives the maximum distortion?
- The output stage of a multistage amplifier usually employs __________?