AC Fundamentals, Circuit and Circuit Theory Wire-wound resistors are unsuitable for use at high frequencies because they Exhibit unwanted inductive and capacitive effects Are likely to melt under excessive eddy current heat Consume more power Create more electrical noise Exhibit unwanted inductive and capacitive effects Are likely to melt under excessive eddy current heat Consume more power Create more electrical noise ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters? 220 v3 V 220 V 220/v3 V None of these 220 v3 V 220 V 220/v3 V None of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The power is measured in terms of decibels in case of Auto transformers Current transformers Transformers Electronic equipment Auto transformers Current transformers Transformers Electronic equipment ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In AC. circuits, laminated iron is invariably used in order to Reduce circuit permeability Increase heat radiation Make assembly cheap and easier Reduce eddy current loss Reduce circuit permeability Increase heat radiation Make assembly cheap and easier Reduce eddy current loss ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Two waves of the same frequency have opposite phase when the phase angle between them is 360° 90° 0° 180° 360° 90° 0° 180° 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 2.5 5 15 10 2.5 5 15 ANSWER DOWNLOAD EXAMIANS APP
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