A Best Way To Crack Gorenment Job Exams

Electrical Engineering Objective Questions { Complex AC }

8. Power absorbed in a pure inductive circuit is zero because
A. reactive component of current is zero.
B. active component of current is maximum
C. power factor of the circuit is zero
D. reactive and active components of current cancel out
Discuss in Forum

9. An alternating voltage v = Vm sin 0 is applied to a pure capacitive circuit. The current equation will be
A. 1m sin 0
B. Im sin (0 ? n/2)
C. 1m sin (0 + n/4)
D. Im sin (0 + n/2)
Discuss in Forum

10. A 500 V sine wave generator appears across a 10 ki2 resistor. What is the instantaneous current in the resistor at a phase angle of 35??
A. 124 mA
B. 22.6 mA
C. 52 mA
D. 40.6 mA
Discuss in Forum

11. The instantaneous value of i(t) = 16 sin (2 n x 18 x 104 t? 15?) mA at t = 2 ps is
A. 13.4 inA
B. 14.55 mA
C. 8.9 mA
D. none of the above
Discuss in Forum

12. An electric bulb rated at 220 V is connected to 220 V, 5 Hz a.c. source. Then the bulb
A. does not glow
B. fuses
C. glows continuously
D. glows intermittently
Discuss in Forum

13. The purpose of choke in a flourescent tube is
A. to decrease the current
B. to increase the current
C. to decrease the voltage momentarily
D. to increase the voltage momentarily
Discuss in Forum

14. The power factor of an a.c. circuit is given by
B. Z/R
D. R/Z
Discuss in Forum

Page 2 of 36

« 1  2  34 »