A.C. Fundamentals, Circuits and Circuit Theory

A. zero
B. 0.08 lagging
C. 0.8 leading
D. unity

A. the current is in phase with the voltage
B. the current lags behind the voltage by 90°
C. the current leads the voltage by 90°
D. the current can lead or lag by 90°

A. unsymmetrical part of the wave form
B. the quarter cycle
C. the half cycle
D. the whole cycle

A. changes in the stored energy in the inductors and capacitors
B. impedance of the circuit
C. applied voltage to the circuit
D. resistance of the circuit

A. current lags behind the voltage by 90°
B. current leads the voltage by 90°
C. current can lead or lag the voltage by 90°
D. current is in phase with the voltage

A. C only
B. L only
C. R only
D. all above

A. the more heat than produced by A.C. when flowing through the same circuit
B. the same heat as produced by A.C. when flowing through the same circuit
C. the less heat than produced by A.C. flowing through the same circuit
D. none of the above

A. falls to 36.8% of its final steady value
B. rises to 38.6% of its final steady value
C. rises to 63.2% of its final steady value
D. none of the above

A. r.m.s. value is equal to average value
B. r.m.s. value of current is greater than average value
C. r.m.s. value of current is less than average value
D. none of the above

A. oscillating
B. square wave
C. sinusoidal
D. non-oscillating