AC Fundamentals, Circuit and Circuit Theory Ohm is unit of all of the following except Capacitance Inductive reactance Capacitive reactance Resistance Capacitance Inductive reactance Capacitive reactance Resistance 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 25 5 15 10 25 5 15 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? VL and VR VC and VR None of these VC and VL VL and VR VC and VR None of these VC and VL ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The power consumed in a circuit element will be least when the phase difference between the current and voltage is 60° 90° 180° 30° 60° 90° 180° 30° ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value Will change the resonance frequency Will increase the selectivity of the circuit Will change the impedance at resonance frequency Will change the maximum value of current at resonance Will change the resonance frequency Will increase the selectivity of the circuit Will change the impedance at resonance frequency Will change the maximum value of current at resonance ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The period of a sine wave is ___________ seconds. Its frequency is 30 Hz 40 Hz 20 Hz 50 Hz 30 Hz 40 Hz 20 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
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