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 Inductance affects the direct current flow At all the time of operation Only at the time of turning off Only at the time of turning on At the time of turning on and off At all the time of operation Only at the time of turning off Only at the time of turning on At the time of turning on and off ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees. 30 45 60 90 30 45 60 90 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Which of the following statements pertains to resistors only? Oppose sudden changes in voltage Can act as energy storage devices Can dissipate considerable amount of power Connecting them in parallel increases the total value Oppose sudden changes in voltage Can act as energy storage devices Can dissipate considerable amount of power Connecting them in parallel increases the total value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Which of the following coil will have large resonant frequency? A coil with large resistance A coil with low resistance A coil with large distributed capacitance A coil with low distributed capacitance A coil with large resistance A coil with low resistance A coil with large distributed capacitance A coil with low distributed capacitance ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory All definitions of power factor of a series R-L-C circuit are correct except Ratio of net reactance and impedance Ratio of kW and kVA Ratio of J and Z Ratio of W and VA Ratio of net reactance and impedance Ratio of kW and kVA Ratio of J and Z Ratio of W and VA ANSWER DOWNLOAD EXAMIANS APP
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