AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of pure cosine function is Same as peak value Zero 0.707 of peak value 0.5 of peak value Same as peak value Zero 0.707 of peak value 0.5 of peak value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Ohm is unit of all of the following except Resistance Inductive reactance Capacitance Capacitive reactance Resistance Inductive reactance Capacitance Capacitive reactance ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW 40 kW 36 kW 80 kW 32 kW 40 kW 36 kW 80 kW 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. 2.5 5 10 15 2.5 5 10 15 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The time constant of the capacitance circuit is defined as the time during which voltage Falls to 36.8% of its final steady value Rises to 38.6% of its final steady value None of these Rises to 63.2% of its final steady value Falls to 36.8% of its final steady value Rises to 38.6% of its final steady value None of these Rises to 63.2% of its final steady value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In AC. circuits, laminated iron is invariably used in order to Reduce eddy current loss Reduce circuit permeability Make assembly cheap and easier Increase heat radiation Reduce eddy current loss Reduce circuit permeability Make assembly cheap and easier Increase heat radiation ANSWER DOWNLOAD EXAMIANS APP
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