JobSandhan.com

Latest Govt Job Notification Sarkari Naukri Employment News 2018

Series AC Circuits MCQ Questions Answers Electrical Engineering

Series AC Circuits Electrical Engineering MCQ Questions Answers


1) Impedance of an a.c. circuit is a ________________.

a) phasor

b) vector quantity

c) scalar quantity

d) none of the above

View Answer

2) The active and apparent powers of an a.c. circuit are equal in magnitude. The circuit power factor is …….

a) o.707

b) 0.5

c) 0.8

d)1

View Answer

3) The power factor of a.c. circuit is ………..

a) 0

b) 1

c) -1

d) none of the above

View Answer

4) A series resonant circuit magnifies …………

a) voltage

b) current

c) both voltage and current

d) none of the above

View Answer

5) The Q factor of a coil is given by ……..

a) R/XL

b) I/XL

c) I/R

d) XL/R

View Answer

6)  Dynamic impedance of a parallel tuned circuit is …………

a) L/CR

b) RL/C

c) L/C

d) R/L

View Answer

7) Power factor of a circuit can be improved by the use of

a) choke coil

b) capacitor

c) induction motor

d) none of the above

View Answer

8) Wattless current is said of flow when phase angle between voltage and current is

a) 900

b) 00

c) 600

d) 1800

View Answer

9) In the above question, what is the true power supplied to the circuit ?

a) 9 W

b) 18 W

c) 4.5 W

d) 36.8 W

View Answer

10) In an R-L  series a.c. circuit XL=R. the phase angle is

a) 900

b) 300

c) 450

d) cannot be predicted

View Answer
[fbcomments]
JobSandhan.com © 2018        Home     About Us     Sitemap     Disclaimer     Privacy Policy     Contact us