RL Circuits

Q1:
Which of the following statements is true if R1 opens in the circuit in the given circuit?

A
IL2 increases.

B
ZT decreases.

C
VS increases.

D
VL1 equals 0 V.

Q2:
Calculate the voltage dropped across L2 in the given circuit.

A 18 V

B 6 V

C 13.5 V

D 0 V

Q3:
If XL= 100 omega.gif and R = 100 omega.gif, then impedance will be

A 141.4 omega.gif

B 14.14 omega.gif

C 100 omega.gif

D 200 omega.gif

Q4:
What is the true power of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?

A 313.45 W

B 12.8 W

C 44.96 W

D 22.3 W

Q5:
What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?

A 0.001°

B 2.3°

C 87.6°

D 89.9°

Q6:
Which of the following statements is true if R = 100 omega.gif and XL = 100 omega.gif in the circuit in the given circuit?

A Each component drops 5 V.

B The impedance equals 200 omega.gif.

C The power factor equals 1.

D The phase angle equals 45°.

Q7:
Which of the following statements is true if the frequency decreases in the circuit in the given circuit?

A The phase angle decreases.

B
VR decreases.

C
IT decreases.

D
VS decreases.

Q8:
Calculate the voltage dropped across R1 in the given circuit.

A 14 V

B 26.8 V

C 28 V

D 0 V

Q9: As frequency increases

A
both series and parallel RL impedance decrease

B
series RL impedance decreases and parallel RL impedance increases

C
series RL impedance increases and parallel RL impedance decreases

D
both series and parallel RL impedance increase

Q10: What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 komega.gif and a 1 komega.gif resistor are in series with a source?

A 0.1°

B 9.0°

C 61.0°

D 81.0°

Q11: Which of the following statements is true about a lag network?

A An increase in frequency causes an increase in phase lag.

B An increase in frequency causes an increase in the magnitude of the output voltage.

C A decrease in frequency causes an increase in phase lag.

D A decrease in frequency causes a decrease in the magnitude of the output voltage.

Q12:
Which of the following statements is true if the inductor shorts out in the circuit in the given circuit?

A Each component drops 5 V.

B The impedance equals 0 omega.gif.

C The power factor equals 1.

D The phase angle equals 90°.


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