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 ?
Correct answer: D. 20 W
- A. 10 W
- B. 15 W
- C. 5 W
- D. 20 W
Explanation
A transformer-coupled Class A amplifier has a maximum theoretical efficiency of 50%, so producing 10 W of a.c. output requires at least 20 W of transistor input power rating. The 10 W option confuses output power with the required device rating.
Last updated
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 db corresponds to_____________change in power level?
A 1,000 V power supply would use_____________ as a filter capacitor?
A 10 V power supply would use ____________ as filter capacitor?
A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A 25eV electron has a speed of______________?