A sine wave has a frequency of 50 Hz. Its angular frequency is __________ radian/second. 25 JT 5 n 50 jt 100 n TRUE ANSWER : ? YOUR ANSWER : ?
A parallel AC. circuit in resonance will 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 TRUE ANSWER : ? YOUR ANSWER : ?
The inductance of a coil can be increased by Decreasing the number of turns Decreasing the diameter of the former Choosing core material having high relative permeability Increasing core length TRUE ANSWER : ? YOUR ANSWER : ?
The r.m.s. value of pure cosine function is Same as peak value Zero 0.5 of peak value 0.707 of peak value TRUE ANSWER : ? YOUR ANSWER : ?
An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms, The current through the resistance is less The current through the resistance is more Both resistance and inductance carry equal currents None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
A phasor is A colored tag or band for distinction between different phases of a 3-phase supply A line which represents the magnitude and phase of an alternating quantity An instrument used for measuring phases of an unbalanced 3-phase load A line representing the magnitude and direction of an alternating quantity TRUE ANSWER : ? YOUR ANSWER : ?
The purpose of a parallel circuit resonance is to magnify Frequency Power Voltage Current TRUE ANSWER : ? YOUR ANSWER : ?
For a sine wave with peak value Emax ___________ the average value is 0.434 Emax 0.636 Emax 0.707 Emax None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
In an A.C. circuit power is dissipated in None of the listed here Capacitance only Resistance only Inductance only TRUE ANSWER : ? YOUR ANSWER : ?