The rated voltage of a 3-phase power system is given as? Mark as favorite Copy Link rms phase voltage rms line-to-line voltage peak line-to-line voltage peak phase voltage Check Answer
For a 3-phase load balanced condition, each phase has the same value of? Mark as favorite Copy Link impedance resistance power factor all of these Check Answer
A 3-phase delta-connected symmetrical load consumes P watts of power from a balanced supply. If the same load is connected in star to the same supply, then what is the power consumption? Mark as favorite Copy Link P P/3 3P ?3P Check Answer
Two resistors of equal values are connected series across the lines B and C of a symmetrical 3-phase, 400 V system. What is the magnitude of the voltage between the line A and the junction of resistors? Mark as favorite Copy Link 400//3 100/3 200/3 400/3 Check Answer
In a series RL circuit, 9 V rms is measured across the resistor, and 15 V rms is measured across the inductor. The peak value of the source voltage is? Mark as favorite Copy Link 18.43.0 V 17.49 V 16.21 V 16 V Check Answer
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is? Mark as favorite Copy Link 6 VA 0 VA 24 VA 12 VA Check Answer
For a certain load, the true power is 11 W and the reactive power is 60 VAR. The apparent power is? Mark as favorite Copy Link 11 W 61 W 60 W 65 W Check Answer
The reactance offered by a capacitor to ac of frequency 50 Hz is 102. If the frequency is increased to 100 Hz, reactance becomes? Mark as favorite Copy Link 20? 40? 5? 2.5? Check Answer
A square wave is fed to an R-C circuit. Then? Mark as favorite Copy Link voltage across both R and C is square voltage across R is square and across C is not square voltage across both R and C is not square voltage across C is square and across R is not square Check Answer
A 240 V single-phase ac source is connected to a load with an impedance of 10 2. A capacitor is connected in parallel with the load. If the capacitor supplies 1,250 VAR, the real power supplied by the source is? Mark as favorite Copy Link 3,600 W 2,400 W 2,880 W 1,200 W Check Answer