What is true about the volt-amperes of the primary and secondary windings in a transformer?

In a transformer, the volt-amperes (VA) of the primary and secondary windings are equal under ideal conditions, which is fundamentally described by the principle of conservation of energy. A transformer operates by transferring electrical energy from one circuit to another through magnetic coupling.

When the transformer is at no load, the input power on the primary side (in volt-amperes) is equal to the output power on the secondary side, assuming no losses due to heat or other factors. This relationship holds true as long as the transformer is functioning properly and the correct voltage and current ratios are maintained according to the turns ratio of the windings.

Thus, when considering a transformer in its efficient operating state, the volt-amperes of both primary and secondary are indeed equal, reinforcing the understanding of energy conservation in electrical systems.