AC Fundamentals, Circuit and Circuit Theory The equation of 50 Hz current sine wave having r.m.s. value of 60 A is 60 sin 25 t 60 sin 50 t 42.42 sin 314 t 84.84 sin 3141 60 sin 25 t 60 sin 50 t 42.42 sin 314 t 84.84 sin 3141 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The frequency of an alternating current is The number of waves passing through a point in one second The number of cycles generated in one minute The number of electrons passing through a point in one second The speed with which the alternator runs The number of waves passing through a point in one second The number of cycles generated in one minute The number of electrons passing through a point in one second The speed with which the alternator runs ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of Capacitive effect between adjacent coil turns Increase in temperature Iron loss in core Skin effect Capacitive effect between adjacent coil turns Increase in temperature Iron loss in core Skin effect ANSWER DOWNLOAD EXAMIANS APP
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. 10 15 5 25 10 15 5 25 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Form Factor is the ratio of r.m.s. value/peak value r.m.s. value/average value Average value/r.m.s. value Average value/peak value r.m.s. value/peak value r.m.s. value/average value Average value/r.m.s. value Average value/peak value ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The product of apparent power and cosine of the phase angle between circuit voltage and current is Instantaneous power Volt-amperes Reactive power True power Instantaneous power Volt-amperes Reactive power True power ANSWER DOWNLOAD EXAMIANS APP
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