Month: December 2018

A. series resistance needs a low-resistance source for sharp rise in current
B. series resonance needs a high-resistance source for sharp increase in current
C. parallel resonance needs a low-resistance source for a sharp in¬crease in impedance
D. parallel resonance needs a low-resistance source for a sharp rise in line current

A. the speed with which the alternator runs
B. the number of cycles generated in one minute
C. the number of waves passing through a point in one second
D. the number of electrons passing through a point in one second

A. inductive reactance
B. capacitive reactance
C. resistance
D. capacitance

A. 60 sin 25 t
B. 60 sin 50 t
C. 84.84 sin 3141
D. 42.42 sin 314 t

A. less than unity
B. unity
C. greater than unity
D. zero

A. be reduced by half
B. be doubled
C. be four times as high
D. be reduced to one fourth

A. be reduced by half
B. be doubled
C. be four times at high
D. be reduced to one fourth

A. the current through the resistance is more
B. the current through the resistance is less
C. both resistance and inductance carry equal currents
D. none of the above

A. true power
B. reactive power
C. volt-amperes
D. instantaneous power

A. the capacitive reactance in ohms
B. the current flowing in capacitor
C. the size of the capacitor being quite big
D. the statement is incorrect