AC Fundamentals, Circuit and Circuit Theory A phasor is A line representing the magnitude and direction of an alternating quantity A colored tag or band for distinction between different phases of a 3-phase supply An instrument used for measuring phases of an unbalanced 3-phase load A line which represents the magnitude and phase of an alternating quantity A line representing the magnitude and direction of an alternating quantity A colored tag or band for distinction between different phases of a 3-phase supply An instrument used for measuring phases of an unbalanced 3-phase load A line which represents the magnitude and phase of an alternating quantity ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that Both waves must have zero value at the same time Both waves must have identical peak values Both waves must have same frequency None of these Both waves must have zero value at the same time Both waves must have identical peak values Both waves must have same frequency None of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The form factor is the ratio of Average value to r.m.s. value None of these Peak value to r.m.s. value r.m.s. value to average value Average value to r.m.s. value None of these Peak value to r.m.s. value r.m.s. value to average value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The peak value of a sine wave is 200 V. Its average value is 127.4 V 141.4 V 282.8 V 200 V 127.4 V 141.4 V 282.8 V 200 V ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The power is measured in terms of decibels in case of Current transformers Transformers Auto transformers Electronic equipment Current transformers Transformers Auto transformers Electronic equipment ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave? 30 sin 50 t 84.84 sin 25 t 42.42 sin 314 t 60 sin 25 t 30 sin 50 t 84.84 sin 25 t 42.42 sin 314 t 60 sin 25 t ANSWER DOWNLOAD EXAMIANS APP
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