23. A series RLC circuit has an inductive reactance of 5 92 and a capacitive reactance AC frequency be changed to put this circuit into resonance? of 1/5 2. By what factor should the a, b. 1/5 c. e. This circuit cannot be made to achieve resonance. 24. What is the average power dissipation in an RLC series circuit in which R-1710 L-0.00 H, and C driven at resonance by a 163-V (rms) source? 865 F a. 150 W b. 138 W c. 147 W d. 144 W e. 1 370 w nsists of an AC audio amplifier, a resistor, and a speaker, all in series. The amplifier puts out an alternating voltage of 16.0 V (rms), the resistance of the resistor is 100 ?, and the speaker has a resistance of 11.9 ?, what is the time-averaged power delivered to the speaker? a. 21.5 W b. 30.5 W c. 6.35 W d. 8.69 W 26. A transformer consists of a 780-turn primary coil and a 1 403-turn secondary coil. If the current in the secondary is 3.49 A, what is the primary current? a. 1.94 A b. 4.68 A c. 6.28 A d. 3.49 A e. 2.60 A 27. An electric motor produces 2.0 hp in a Vrms- 120 V circuit. Using 1 hp- 746 W, how long would it take this motor to do 1.0 kWh of work? a. 0.67 min c. 1.3 min b. 0.67 h d. 1.3 h 28. A series RLC circuit is connected across a 240-Hz AC source, where AVmax -140 V, R-480 2, C-0.250 uF, and L -3.25 H. What is the average power delivered to this circuit? ?. 77.9W b. 1.78 W c. 3.56 w d. 0.890 W
Solution
23.
Answer is
For circuit to be at resonance ,it shoul meet
Inductive reactance =Capacitive reactance
Therefore it should be multiplied by a factor of 1/5
24.
at resonance
I=V/R =163/177=0.921 A
Average power
P=I 2 R =0.921 2 *177 =150 Watts
.
23- A series RLC circuit has an inductive reactance of 5 92 and a capa.docx
1. 23. A series RLC circuit has an inductive reactance of 5 92 and a capacitive reactance AC
frequency be changed to put this circuit into resonance? of 1/5 2. By what factor should the a, b.
1/5 c. e. This circuit cannot be made to achieve resonance. 24. What is the average power
dissipation in an RLC series circuit in which R-1710 L-0.00 H, and C driven at resonance by a
163-V (rms) source? 865 F a. 150 W b. 138 W c. 147 W d. 144 W e. 1 370 w nsists of an AC
audio amplifier, a resistor, and a speaker, all in series. The amplifier puts out an alternating
voltage of 16.0 V (rms), the resistance of the resistor is 100 ?, and the speaker has a resistance of
11.9 ?, what is the time-averaged power delivered to the speaker? a. 21.5 W b. 30.5 W c. 6.35 W
d. 8.69 W 26. A transformer consists of a 780-turn primary coil and a 1 403-turn secondary coil.
If the current in the secondary is 3.49 A, what is the primary current? a. 1.94 A b. 4.68 A c. 6.28
A d. 3.49 A e. 2.60 A 27. An electric motor produces 2.0 hp in a Vrms- 120 V circuit. Using 1
hp- 746 W, how long would it take this motor to do 1.0 kWh of work? a. 0.67 min c. 1.3 min b.
0.67 h d. 1.3 h 28. A series RLC circuit is connected across a 240-Hz AC source, where AVmax
-140 V, R-480 2, C-0.250 uF, and L -3.25 H. What is the average power delivered to this circuit?
?. 77.9W b. 1.78 W c. 3.56 w d. 0.890 W
Solution
23.
Answer is
For circuit to be at resonance ,it shoul meet
Inductive reactance =Capacitive reactance
Therefore it should be multiplied by a factor of 1/5
24.
at resonance
I=V/R =163/177=0.921 A
Average power
