A. very low
B. low
C. medium
D. high
Related Mcqs:
- At very low frequencies a series R-C circuit behaves as almost purely___________?
A. resistive
B. inductive
C. capacitive
D. none of the above - At _______ frequencies the parallel R-L circuit behaves as purely resistive
A. low
B. very low
C. high
D. very high - Wire-wound resistors are unsuitable for use at high frequencies because they_______?
A. create more electrical noise
B. are likely to melt under excessive eddy current heat
C. consume more power
D. exhibit unwanted inductive and capacitive effects - The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces__________?
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 - The square waveform of current has following relation between r.m.s. value and average value?
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 - When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
A. apparent power
B. true power
C. reactive power
D. none of the above - The product of apparent power and cosine of the phase angle between circuit voltage and current is
A. true power
B. reactive power
C. volt-amperes
D. instantaneous power - The equation of 50 Hz current sine wave having r.m.s. value of 60 A is____________?
A. 60 sin 25 t
B. 60 sin 50 t
C. 84.84 sin 3141
D. 42.42 sin 314 t - In a parallel R-C circuit, the current always________the applied voltage?
A. lags
B. leads
C. remains in phase with
D. none of the above - If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave_________ ?
A. 42.42 sin 3141
B. 60 sin 25 t
C. 30 sin 50 t
D. 84.84 sin 25 t
