AC Fundamentals, Circuit and Circuit Theory The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 ohm. If frequency is increased to 100 Hz, reactance becomes __________ ohms. 25 10 5 15 25 10 5 15 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a parallel R-C circuit, the current always _________the applied voltage. Lags Remains in phase with None of the listed here Leads Lags Remains in phase with None of the listed here Leads ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In AC. circuits, laminated iron is invariably used in order to Reduce circuit permeability Reduce eddy current loss Increase heat radiation Make assembly cheap and easier Reduce circuit permeability Reduce eddy current loss Increase heat radiation Make assembly cheap and easier ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The main cause of silting up a channel, Defective head regulator Inadequate slope Non-regime section All of these Defective head regulator Inadequate slope Non-regime section All of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Skin effect occurs when a conductor carries current at _________ frequencies. Medium Low Very low High Medium Low Very low High 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 42.42 sin 314 t 84.84 sin 25 t 30 sin 50 t 60 sin 25 t 42.42 sin 314 t 84.84 sin 25 t ANSWER DOWNLOAD EXAMIANS APP
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