AC Fundamentals, Circuit and Circuit Theory Two waves of the same frequency have opposite phase when the phase angle between them is 90° 360° 180° 0° 90° 360° 180° 0° 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. 5 25 10 15 5 25 10 15 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is A sinusoid of the same frequency A sinusoid of double the frequency None of the listed here A sinusoid of half the original frequency A sinusoid of the same frequency A sinusoid of double the frequency None of the listed here A sinusoid of half the original frequency ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms, None of the listed here The current through the resistance is less Both resistance and inductance carry equal currents The current through the resistance is more None of the listed here The current through the resistance is less Both resistance and inductance carry equal currents The current through the resistance is more ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of pure cosine function is Zero Same as peak value 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 ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave? 42.42 sin 314 t 84.84 sin 25 t 30 sin 50 t 60 sin 25 t 42.42 sin 314 t 84.84 sin 25 t 30 sin 50 t 60 sin 25 t ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS