AC FUNDAMENTALS MCQS PART 7
121 The phase angle between the current and the voltage will be 𝟎°.
- The dc applied voltage necessary for the same heating affect in the resistance will be
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.
- 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 𝜋⁄4 radians will be 11.3 A.
- The instantaneous power at 𝜋⁄4 radians will be 2.56 kW.
127 The instantaneous value of current at5𝜋4radians will be –5.5 A.
128 The instantaneous power at3𝜋4radians 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.