I. Multiple Choice: (x4) 1. The impedance of an RL series circuit is given by a. R+ XL b. R²+X₁² c. (R²+X₁²) 1/2 d. none of the above 2. In an RL series circuit, line current Leads the applied voltage a. b. c. d. 3. In an RL series circuit, the phase difference between applied voltage and circuit current will increase if. XL is increased R is increased Lags behind the applied voltage Is in phase with the applied voltage Zero a. b. c. XL is decreased d. Supply frequency is decreased 4. The power consumed in an ac circuit is given by a. Valm b. (VI/2)cose c. IZcose d. Vm Im cose 5. The power factor of an ac circuit is given by. a. XUR b. Z/R c. R/XL d. R/Z 100 and X₁ 102 The

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter6: Power Flows
Section: Chapter Questions
Problem 6.61P
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I. Multiple Choice: (x4)
1. The impedance of an RL series circuit is given by
a. R+ XL
b. R²+X₁²
c. (R²+X₁²) 1/2
d. none of the above
2. In an RL series circuit, line current
Leads the applied voltage
a.
b. Lags behind the applied voltage
Is in phase with the applied voltage
Zero
C.
d.
3. In an RL series circuit, the phase difference between
applied voltage and circuit current will increase if.
XL is increased
a.
b.
R is increased
c.
XL is decreased
d. Supply frequency is decreased
4. The power consumed in an ac circuit is given by
a. V In
b. (VI/2)cose
C.
IZcose
d. Vm Im cose
5. The power factor of an ac circuit is given by.
XUR
a.
b. Z/R
c. R/XL
d. R/Z
M 102. The
6. In an RL series circuit, R-102 and XL 1
phase angle between applied voltage and circuit current
is
a.
45⁰
b. 30⁰
C.
60⁰
d. 36.8⁰
7. For greater accuracy, the value of 0 (phase angle)
should be determined from
a. cose
b. sine
c. tane
d. sece
8. The power factor of a de circuit is
a. 0
b. 1
C.
-1
d. same in-ac-circuit
9. An inductive circuit draws a line current of 10A. If the
reactive component of the line current is 6A, then
power factor of the circuit is.
a. 0.6 lagging
b. 0.857 lagging
C.
0.5 lagging
d. 0.5 leading
Transcribed Image Text:I. Multiple Choice: (x4) 1. The impedance of an RL series circuit is given by a. R+ XL b. R²+X₁² c. (R²+X₁²) 1/2 d. none of the above 2. In an RL series circuit, line current Leads the applied voltage a. b. Lags behind the applied voltage Is in phase with the applied voltage Zero C. d. 3. In an RL series circuit, the phase difference between applied voltage and circuit current will increase if. XL is increased a. b. R is increased c. XL is decreased d. Supply frequency is decreased 4. The power consumed in an ac circuit is given by a. V In b. (VI/2)cose C. IZcose d. Vm Im cose 5. The power factor of an ac circuit is given by. XUR a. b. Z/R c. R/XL d. R/Z M 102. The 6. In an RL series circuit, R-102 and XL 1 phase angle between applied voltage and circuit current is a. 45⁰ b. 30⁰ C. 60⁰ d. 36.8⁰ 7. For greater accuracy, the value of 0 (phase angle) should be determined from a. cose b. sine c. tane d. sece 8. The power factor of a de circuit is a. 0 b. 1 C. -1 d. same in-ac-circuit 9. An inductive circuit draws a line current of 10A. If the reactive component of the line current is 6A, then power factor of the circuit is. a. 0.6 lagging b. 0.857 lagging C. 0.5 lagging d. 0.5 leading
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