AC Fundamentals, Circuit and Circuit Theory The period of a sine wave is ___________ seconds. Its frequency is 20 Hz 40 Hz 50 Hz 30 Hz 20 Hz 40 Hz 50 Hz 30 Hz ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The inductance of a coil can be increased by Decreasing the number of turns Choosing core material having high relative permeability Decreasing the diameter of the former Increasing core length Decreasing the number of turns Choosing core material having high relative permeability Decreasing the diameter of the former Increasing core length ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a series resonant circuit, the impedance of the circuit is Zero Minimum None of these Maximum Zero Minimum None of these Maximum ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The phosphors for which of the following pair are 180° out of phase for VL, VC and VR? VC and VR None of these VL and VR VC and VL VC and VR None of these VL and VR VC and VL ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Skin effect occurs when a conductor carries current at _________ frequencies. Very low Medium High Low Very low Medium High Low ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces The less heat than produced by A.C. flowing through the same circuit The more heat than produced by A.C. when flowing through the same circuit None of these The same heat as produced by A.C. when flowing through the same circuit The less heat than produced by A.C. flowing through the same circuit The more heat than produced by A.C. when flowing through the same circuit None of these The same heat as produced by A.C. when flowing through the same circuit ANSWER DOWNLOAD EXAMIANS APP
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