AC Fundamentals, Circuit and Circuit Theory The frequency of an alternating current is The speed with which the alternator runs The number of cycles generated in one minute The number of electrons passing through a point in one second The number of waves passing through a point in one second The speed with which the alternator runs The number of cycles generated in one minute The number of electrons passing through a point in one second The number of waves passing through a point in one second ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In an AC. circuit, a low value of kVAR compared with kW indicates Maximum load current Unity power factor Low efficiency High power factor Maximum load current Unity power factor Low efficiency High power factor ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a pure inductive circuit The current can lead or lag by 90° The current leads the voltage by 90° The current lags behind the voltage by 90° The current is in phase with the voltage The current can lead or lag by 90° The current leads the voltage by 90° The current lags behind the voltage by 90° The current is in phase with the voltage ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of pure cosine function is 0.707 of peak value Same as peak value 0.5 of peak value Zero 0.707 of peak value Same as peak value 0.5 of peak value Zero 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 60 sin 25 t 84.84 sin 25 t 42.42 sin 314 t 30 sin 50 t 60 sin 25 t 84.84 sin 25 t 42.42 sin 314 t 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 is in phase with the voltage Current lags behind the voltage by 90° Current can lead or lag the voltage by 90° None of the listed here Current is in phase with the voltage Current lags behind the voltage by 90° ANSWER DOWNLOAD EXAMIANS APP
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