AC Fundamentals, Circuit and Circuit Theory What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value? 180° 90° 30° 45° 180° 90° 30° 45° ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Time constant of a circuit is the time in seconds taken after the application of voltage to each 90% of the maximum value 50% of maximum value 63% of maximum value 25% of maximum value 90% of the maximum value 50% of maximum value 63% of maximum value 25% of maximum value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Wire-wound resistors are unsuitable for use at high frequencies because they Consume more power Are likely to melt under excessive eddy current heat Exhibit unwanted inductive and capacitive effects Create more electrical noise Consume more power Are likely to melt under excessive eddy current heat Exhibit unwanted inductive and capacitive effects Create more electrical noise ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value Will change the impedance at resonance frequency Will change the resonance frequency Will increase the selectivity of the circuit Will change the maximum value of current at resonance Will change the impedance at resonance frequency Will change the resonance frequency Will increase the selectivity of the circuit Will change the maximum value of current at resonance ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of pure cosine function is 0.707 of peak value 0.5 of peak value Zero Same as peak value 0.707 of peak value 0.5 of peak value Zero Same as peak value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a parallel R-C circuit, the current always _________the applied voltage. Remains in phase with Leads None of the listed here Lags Remains in phase with Leads None of the listed here Lags ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS