AC Fundamentals, Circuit and Circuit Theory The square waveform of current has following relation between r.m.s. value and average value. r.m.s. value of current is greater than average value r.m.s. value of current is less than average value None of these r.m.s. value is equal to average value r.m.s. value of current is greater than average value r.m.s. value of current is less than average value None of these r.m.s. value is equal to average value 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 change the maximum value of current at resonance Will increase the selectivity of the circuit Will change the impedance at resonance frequency Will change the resonance frequency Will change the maximum value of current at resonance Will increase the selectivity of the circuit Will change the impedance at resonance frequency ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Skin effect occurs when a conductor carries current at _________ frequencies. High Medium Very low Low High Medium Very low Low ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be 282.8 V 141.4 V 100 V 111 V 282.8 V 141.4 V 100 V 111 V 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 VL and VR None of the listed here VC and VL VC and VR VL and VR None of the listed here VC and VL ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Inductance of coil Becomes zero with the increase in supply frequency Decreases with the increase in supply frequency Is unaffected by the supply frequency Increases with the increase in supply frequency Becomes zero with the increase in supply frequency Decreases with the increase in supply frequency Is unaffected by the supply frequency Increases with the increase in supply frequency ANSWER DOWNLOAD EXAMIANS APP
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