Correct option is B
In a three-phase system, the phase displacement between the phases is 3360∘=120∘, and the instantaneous power is constant, equal to three times the power per phase.
Which of the following statements is/are true regarding symmetrical balanced three phase supply:
1 Instantaneous values of power in all of the 3 phases become zero at same instant.
Voltage and current in a single- phase ac circuit are given by (50+j20) V and (20+j50) A respectively. What is the active power consumed in the circuit?
A load resistance R_L is supplied from a dc voltage source of resistance R. Maximum power transfer to the load occurs when which of the following condition is satisfied?
Which of the following colour has wavelength between green and orange?
A star connected resistive network with 20Ω in each phase is supplied with a three-phase ac source of 400 V. What is the total power consumed in the circuit?
Two inductive coils which are close to each other have a mutual inductance of 0.6 H. Current through one coil is increased from 1 A to 6 A in 0.03 s. The voltage induced in the other coil is:
What is the magnetic field strength required to produce a flux density of 1mWb/m² in air?
A copper wire is stretched so that its length is increased by 0.2%. What is the percentage change in the resistance?
What is the unit of magnetizing force?
Power loss and voltage drop respectively, in the 2Ω resistor is

Which among the options is voltage source equivalent of the practical current source shown below?
