AC Fundamentals, Circuit and Circuit Theory The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 ohm. If frequency is increased to 100 Hz, reactance becomes __________ ohms. 15 10 5 25 15 10 5 25 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Capacitive reactance is more when Capacitance is less and frequency of supply is less Capacitance is more and frequency of supply is more Capacitance is more and frequency of supply is less Capacitance is less and frequency of supply is more Capacitance is less and frequency of supply is less Capacitance is more and frequency of supply is more Capacitance is more and frequency of supply is less Capacitance is less and frequency of supply is more 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 VC and VL None of these VL and VR VC and VR VC and VL None of these VL and VR ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Poor power factor Overloads alternators, transformers and distribution lines All of the listed here Results in more power losses in the electrical system Reduces load handling capability of electrical system Overloads alternators, transformers and distribution lines All of the listed here Results in more power losses in the electrical system Reduces load handling capability of electrical system ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Which of the following statements pertains to resistors only? Connecting them in parallel increases the total value Oppose sudden changes in voltage Can dissipate considerable amount of power Can act as energy storage devices Connecting them in parallel increases the total value Oppose sudden changes in voltage Can dissipate considerable amount of power Can act as energy storage devices ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory For a frequency of 200 Hz, the time period will be 0.05 s 0.5 s 0.005 s 0.0005 s 0.05 s 0.5 s 0.005 s 0.0005 s ANSWER DOWNLOAD EXAMIANS APP
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