Volts multiplied by amps multiplied by sinθ equals what?

When volts are multiplied by amps and then multiplied by the sine of the phase angle (sinθ), the result corresponds to reactive power. Reactive power represents the portion of electricity that does no useful work but is necessary for maintaining the electric and magnetic fields in AC systems. This power is measured in volt-amperes reactive (VARs).

In an AC circuit, current and voltage may not be in phase due to inductive or capacitive components, which leads to the phase angle, θ. The sine of this angle indicates how much of the power is not being used for productive work (active power). Therefore, the expression volts × amps × sinθ is specifically used to calculate the reactive power, which is essential for understanding how AC circuits operate and ensuring the efficiency of power systems.

The other options relate to different forms of power. True power in watts refers to the actual power consumed or utilized, while apparent power combines both real and reactive power, and active power in joules concerns energy consumption over time rather than instantaneous power metrics.