(D) The current through any one element is less than the source current (C) The equivalent resistance is greater than any one of the resistors (B) The voltage across element is in proportion to it’s resistance value (A) The current through each element is same Which of the following refers to a parallel circuit? Skin effect occurs when a conductor carries current at _ frequencies. (D) Capacitive effect between adjacent coil turns
The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of (D) Increase with increase of capacitance and increase of resistance (C) Increases with the increase of capacitance and decrease of resistance (B) Increases with the decrease of capacitance and increase of resistance (A) Increases with the decrease of capacitance and decrease of resistance In a circuit containing R, L and C, power loss can take place in In a loss-free R-L-C circuit the transient current is (D) Will increase the selectivity of the circuit (C) Will change the impedance at resonance frequency (A) Will change the maximum value of current at resonance In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value In a series resonant circuit, the impedance of the circuit is The product of apparent power and cosine of the phase angle between circuit voltage and current is (D) Exhibit unwanted inductive and capacitive effects (B) Are likely to melt under excessive eddy current heat Wire-wound resistors are unsuitable for use at high frequencies because they The power is measured in terms of decibels in case of The equation of 50 Hz current sine wave having r.m.s. Which of the following waves has the highest value of peak factor? (D) have current in each section equal to the line current (A) have a high voltage developed across each inductive and capacitive section The purpose of a parallel circuit resonance is to magnify
The safest value of current the human body can carry for more than 3 second is (D) Depends upon the magnitude of R, L and C Magnitude of current at resonance in R-L-C circuit (D) Reactive power is more than actual power (C) Actual power is more than reactive power (B) Reactive power is more than apparent power (A) Apparent power is more than actual power
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