Discussion
A class A stage draws \( 20 \ \mathrm{mA} \) from \( 12 \ \mathrm{V} \). Its quiescent dissipation is
Answer: B
Multiplying supply by current:
\[ P = 12 \times 20\mathrm{m} = 240 \ \mathrm{mW} \]
giving 240 milliwatts, of which some is in the resistors and the rest in the device. At best a quarter of it reaches the load, so the useful output is around sixty milliwatts. Computing the power drawn before the power delivered puts the efficiency question in the right order.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development