AC FUNDAMENTALS MCQS PART 7

121 The phase angle between the current and the voltage will be ๐ŸŽยฐ.

  1. The dc applied voltage necessary for the same heating affect in the resistance will be
    120 V.
    Questions 123 to 124 refer to data given below:
    An a.c wave form with a frequency of 1.5 kHz has a peak value of 3.3 V.
  2. The instantaneous value of voltage at 0.65 micro-second will be 20.2 mV.

124 The instantaneous value at 1.2 milli-seconds will be -3.1 V.
Questions 125 to 128 refer to data given below:
The circuit shown in figure below has a 60 Hz supply voltage with a maximum value
of 160 V.

125 The instantaneous current at ๐œ‹โ„4 radians will be 11.3 A.

  1. The instantaneous power at ๐œ‹โ„4 radians will be 2.56 kW.

127 The instantaneous value of current at5๐œ‹4radians will be –5.5 A.

128 The instantaneous power at3๐œ‹4radians will be 2.56 kW.
Questions 129 to 132 refer to data given below:
A 300 V sinusoidal ac supply is applied to a 50-ohm resistor.

129 The peak value of current through the resistor will be 8.28 A.

130 The rms value of current through the resistor will be 6 A.