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. 15 10 2.5 5 15 10 2.5 5 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The period of a sine wave is ___________ seconds. Its frequency is 20 Hz 40 Hz 30 Hz 50 Hz 20 Hz 40 Hz 30 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The frequency of domestic power supply in India is 50 Hz 250 Hz 200 Hz 150 Hz 50 Hz 250 Hz 200 Hz 150 Hz ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory For a sine wave with peak value Imax the r.m.s. value is 1.414 Imax 0.5 Imax 0.707 0.9 1.414 Imax 0.5 Imax 0.707 0.9 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The time constant of the capacitance circuit is defined as the time during which voltage None of these Rises to 63.2% of its final steady value Falls to 36.8% of its final steady value Rises to 38.6% of its final steady value None of these Rises to 63.2% of its final steady value Falls to 36.8% of its final steady value Rises to 38.6% of its final steady value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Magnitude of current at resonance in R-L-C circuit Depends upon the magnitude of L Depends upon the magnitude of R, Land C Depends upon the magnitude of R Depends upon the magnitude of C Depends upon the magnitude of L Depends upon the magnitude of R, Land C Depends upon the magnitude of R Depends upon the magnitude of C ANSWER DOWNLOAD EXAMIANS APP
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