A parallel AC. circuit in resonance will Have a high voltage developed across each inductive and capacitive section Act like a resistor of low value Have a high impedance Have current in each section equal to the line current TRUE ANSWER : ? YOUR ANSWER : ?
Magnitude of current at resonance in R-L-C circuit Depends upon the magnitude of R, Land C Depends upon the magnitude of L Depends upon the magnitude of R Depends upon the magnitude of C TRUE ANSWER : ? YOUR ANSWER : ?
In a series L-C circuit at the resonant frequency the Current is maximum Voltage across C is minimum Impedance is maximum Current is minimum TRUE ANSWER : ? YOUR ANSWER : ?
In a series resonant circuit, the impedance of the circuit is None of these Maximum Minimum Zero TRUE ANSWER : ? YOUR ANSWER : ?
The main cause of silting up a channel, Defective head regulator Non-regime section Inadequate slope All of these TRUE ANSWER : ? YOUR ANSWER : ?
Inductance of coil Is unaffected by the supply frequency Increases with the increase in supply frequency Becomes zero with the increase in supply frequency Decreases with the increase in supply frequency TRUE ANSWER : ? YOUR ANSWER : ?
Poor power factor Results in more power losses in the electrical system Overloads alternators, transformers and distribution lines All of the listed here Reduces load handling capability of electrical system TRUE ANSWER : ? YOUR ANSWER : ?
Power factor of the system is kept high To reduce voltage regulation of the line All of the listed here To reduce line losses To maximize the utilization of the capacities of generators, lines and transformers TRUE ANSWER : ? YOUR ANSWER : ?
In a pure resistive circuit None of the listed here Current can lead or lag the voltage by 90° Current lags behind the voltage by 90° Current is in phase with the voltage TRUE ANSWER : ? YOUR ANSWER : ?
The power factor of a D.C. circuit is always Greater than unity Unity Less than unity Zero TRUE ANSWER : ? YOUR ANSWER : ?