AC FUNDAMENTALS MCQs Part 06

51. Ohms law (E = IR)
a. can never be applied to a.c
b. can be applied to a.c in the same manner as to d.c
c. can be applied to a.c but after replacing R by Z (impedance)
d. none of the above

52. What frequency is one octave above 110 Hz?
a. 11:Hz
b. 121 Hz
c. 220 Hz
d. 880 Hz

53. What frequency is the fourth harmonic of 4 MHz
a. 1 MHz
b. 8 MHz
c. 16 MHz

54. The rms current in the circuit is
a. 1.2 A
b. 2 A
c. 6 A
d. 12 A

55. The frequency of the current will be
a. 30 Hz
b. 60 Hz
c. 120 Hz
d. 600 Hz

56. The phase angle between the current and the voltage will be
a. 0 degree
b. 30 degree
c. 60 degree
d. 99 degree

57. The dc applied voltage necessary for the same heating effect in the resistance will be
a. 1.414 x 120 V
b. 1.1 x 120 V
c. 120 V
d. 0.707 x 120 V

58. The instantaneous value of voltage at 0.65 micro second will be
a. 10.1 m V
b. 20.2 m V
c. 40.4 m V
d. 80.8 m V

59. The instantaneous value at 1.2 milli-seconds will be
a. 3.1 V
b. 10.1 V
c. -3.1 V
d. -10.1 V

60. The peak value of current through the resistor will be
a. 4.24 mA
b. 8.48 mA
c. 4.24 A
d. 8.28 A

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