Q.1
Low efficiency of a power amplifier results in ___________
Q.2
A power amplifier has comparatively ___________ ß
Q.3
Power amplifiers generally use transformer coupling because transformer per-mits
Q.4
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?
Q.5
A transformer coupled class A power amplifier has a load of 100 Ω on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
Q.6
The driver stage usually employs___________
Q.7
When a transistor is cut off___________
Q.8
If the gain versus frequency curve of a transistor amplifier is not flat, then there is distortion.
Q.9
If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is ___________
Q.10
The output stage of a multistage amplifier is also called ___________
Q.11
A class A power amplifier uses ___________
Q.12
The maximum efficiency of transformer coupled class A power amplifier is ___________
Q.13
The most important consideration in power amplifier is ___________
Q.14
The maximum collector efficiency of class B operation is ___________
Q.15
Class C power amplifier has the highest collector efficiency
Q.16
Power amplifiers handle ___________ signals compare to voltage amplifiers
Q.17
The pulsating d.c. applied to power amplifier causes ___________
Q.18
What turn ratio (Np/Ns) of transformer is required to match 4 Ω speaker to a transistor having an output impedance of 8000 O?
Q.19
The size of a power transistor is made considerably large to ___________
Q.20
Class ___________ operation gives the maximum distortion
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