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? 84.84 sin 25 t 60 sin 25 t 42.42 sin 314 t 30 sin 50 t 84.84 sin 25 t 60 sin 25 t 42.42 sin 314 t 30 sin 50 t ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The power factor of a D.C. circuit is always Unity Less than unity Greater than unity Zero Unity Less than unity Greater than unity Zero 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 None of these Both waves must have same frequency Both waves must have zero value at the same time Both waves must have identical peak values None of these Both waves must have same frequency ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The voltage of domestic supply is 220 V. This figure represents Average value Mean value R.m.s. value Peak value Average value Mean value R.m.s. value Peak value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a pure resistive circuit Current can lead or lag the voltage by 90° None of the listed here Current lags behind the voltage by 90° Current is in phase with the voltage Current can lead or lag the voltage by 90° None of the listed here Current lags behind the voltage by 90° Current is in phase with the voltage ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory At very low frequencies a series R-C circuit behaves as almost purely Resistive Capacitive None of the listed here Inductive Resistive Capacitive None of the listed here Inductive ANSWER DOWNLOAD EXAMIANS APP
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