An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
Correct answer: C. 0.161 µF
- A. 81 µF
- B. 161 µF
- C. 0.161 µF
- D. 220 µF
Explanation
“Ten times less than R” means the capacitive reactance is about 82 Ω, since 820/10 = 82 Ω. Using C = 1/(2πfXc) gives C ≈ 0.161 µF, while the much larger values would produce far smaller reactance.
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______________?