Related Questions

The maximum efficiency of transformer coupled class A power amplifier is ___________
A 30%
B 50%
C 80%
D 45%
A class A power amplifier is sometimes called ___________ amplifier
A Symmetrical
B Single-ended
C Reciprocating
D Differential
A single phase transformer has a maximum efficiency of 90% at full load and unity power factor. Efficiency at half load at the same power factor is -
A 87.8%
B 86.7%
C 88.26%
D 88.9%
When no signal is applied, the approximate collector efficiency of class A power amplifier is
A 10%
B 0%
C 25%
D 50%
Class C power amplifier has the highest collector efficiency
A C
B A
C B
D AB
The ratio of boys to girls in class A is 3 to 4 . The ratio of boys to girls in class B is 4 to 5 . If the two classes were combined, the ratio of boys to girls in class B is two less than the number of girls in class A. How many girls are in class A?
A 87
B 11
C 12
D 15
Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?
A 81
B 81.5
C 82
D 84.5
In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of ___________
A RC + RL
B RC || RL
C RL
D RC
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is
A RL + RC
B RC || RL
C RL - RC
D RC
The output power of a transistor amplifier is more than the input power because the additional power is supplied by ___________
A Transistor
B Biasing circuit
C Collector supply VCC
D None of the above

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