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 identical peak values Both waves must have zero value at the same time None of the listed here Both waves must have same frequency Both waves must have identical peak values Both waves must have zero value at the same time None of the listed here Both waves must have same frequency ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Power factor of an electrical circuit is equal to Cosine of phase angle difference between current and voltage Ratio of useful current to total current Iw/I R/Z all of these Cosine of phase angle difference between current and voltage Ratio of useful current to total current Iw/I R/Z all of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Power factor of the system is kept high To maximize the utilization of the capacities of generators, lines and transformers All of the listed here To reduce line losses To reduce voltage regulation of the line To maximize the utilization of the capacities of generators, lines and transformers All of the listed here To reduce line losses To reduce voltage regulation of the line ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Power factor of the following circuit will be zero Capacitance Resistance Inductance Both of the listed here Capacitance Resistance Inductance Both of the listed here 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? 84.84 sin 25 t 30 sin 50 t 60 sin 25 t 42.42 sin 314 t 84.84 sin 25 t 30 sin 50 t 60 sin 25 t 42.42 sin 314 t ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes __________ ohms. 10 5 15 2.5 10 5 15 2.5 ANSWER DOWNLOAD EXAMIANS APP
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