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.Management Sciences
Category: Transistor Audio Power Amplifiers
The size of a power transistor is made considerably large to________________?
A. Provide easy handling
B. Dissipate heat
C. Facilitate connections
D. None of the above
The driver stage usually employs_________________?
A. Class A power amplifier
B. Push-pull amplifier
C. Class C amplifier
D. None of the above
The disadvantage of impedance matching is that it _______________?
A. Gives distorted output
B. Gives low power output
C. Requires a transformer
D. None of the above
Low efficiency of a power amplifier results in_________________?
A. Low forward bias
B. Less battery consumption
C. More battery consumption
D. None of the above
What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
A. 2
B. 7
C. 3
D. None of the above
When a transistor is cut off _________________?
A. Maximum voltage appears across transistor
B. Maximum current flows
C. Maximum voltage appears across load
D. None of the above
The pulsating d.c. applied to power amplifier causes________________?
A. Burning of transistor
B. Hum in the circuit
C. Excessive forward voltage
D. None of the above
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