AC Fundamentals, Circuit and Circuit Theory Time constant of a circuit is the time in seconds taken after the application of voltage to each 63% of maximum value 50% of maximum value 90% of the maximum value 25% of maximum value 63% of maximum value 50% of maximum value 90% of the maximum value 25% of maximum value 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? 60 sin 25 t 84.84 sin 25 t 30 sin 50 t 42.42 sin 314 t 60 sin 25 t 84.84 sin 25 t 30 sin 50 t 42.42 sin 314 t ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The period of a sine wave is ___________ seconds. Its frequency is 30 Hz 50 Hz 40 Hz 20 Hz 30 Hz 50 Hz 40 Hz 20 Hz ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value Will change the resonance frequency Will change the maximum value of current at resonance Will change the impedance at resonance frequency Will increase the selectivity of the circuit Will change the resonance frequency Will change the maximum value of current at resonance Will change the impedance at resonance frequency Will increase the selectivity of the circuit ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The main cause of silting up a channel, Inadequate slope Defective head regulator Non-regime section All of these Inadequate slope Defective head regulator Non-regime section All of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters? 220 V None of these 220/v3 V 220 v3 V 220 V None of these 220/v3 V 220 v3 V ANSWER DOWNLOAD EXAMIANS APP
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