AC Fundamentals, Circuit and Circuit Theory Power factor of an electrical circuit is equal to Ratio of useful current to total current Iw/I Cosine of phase angle difference between current and voltage R/Z all of these Ratio of useful current to total current Iw/I Cosine of phase angle difference between current and voltage R/Z all of these ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Pure inductive circuit Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle Consumes some power on average None of the listed here Does not take power at all from a line Takes power from the line during some part of the cycle and then returns back to it during other part of the cycle Consumes some power on average None of the listed here Does not take power at all from a line ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory A parallel AC. circuit in resonance will Act like a resistor of low value Have current in each section equal to the line current Have a high impedance Have a high voltage developed across each inductive and capacitive section Act like a resistor of low value Have current in each section equal to the line current Have a high impedance Have a high voltage developed across each inductive and capacitive section 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 R, Land C Depends upon the magnitude of C Depends upon the magnitude of R Depends upon the magnitude of L Depends upon the magnitude of R, Land C Depends upon the magnitude of C Depends upon the magnitude of R Depends upon the magnitude of L ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters? 220 v3 V 220/v3 V None of these 220 V 220 v3 V 220/v3 V None of these 220 V ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The power factor of a D.C. circuit is always Greater than unity Unity Less than unity Zero Greater than unity Unity Less than unity Zero ANSWER DOWNLOAD EXAMIANS APP
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