Electrical Engineering - RLC Circuits and Resonance

Exercise :: RLC Circuits and Resonance - General Questions

6. 

The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02 F, and RW = 90 is

A. 0
B. 90
C. 20 k
D. 40 k

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

7. 

A 6.8 k resistor, a 7 mH coil, and a 0.02 F capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 . The equivalent parallel resistance, Rp(eq), is

A. 1,878
B. 18,780
C. 18,750
D. 626

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

8. 

Referring to Problem 20, what is the total parallel resistance (Rp(tot))?

A. 4.99
B. 499
C. 4,992
D. 6,800

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

9. 

A 200 resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance

A. is 230
B. is 170
C. is 200
D. cannot be determined

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

10. 

Referring to Problem 8, the total current is

A. 1.5 A
B. 573 mA
C. 5.73 A
D. 1.19 A

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.