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For more details in the reactive case, see AC power.

Don't feel like rewiring the AC power to your home or office to do it?

If the battery can no longer hold a charge, then the computer cannot run on AC power and hence it will not boot.

AC power is cheaper and easier to make electronic devices.

The power switches for AC power are also less expensive to make.

If connected to a source of power it can also provide active AC power.

These are particularly interesting to the building/construction contractor market, since they often require AC power when on the job.

Its intended use was in applications where AC power is supplied to the field nodes.

Most systems have a characteristic voltage and, in the case of AC power, a system frequency.

And he was suddenly hit by 220 volts of AC power.

As reactive power can be either positive or negative, this leads to the concept of cancelling it out.

That troubles with reactive power could be behind the failure is not a surprise to many industry officials and other energy experts.

Long-distance transmission also makes the need for reactive power unpredictable, experts say.

All required reactive power is delivered from the generators of the power plant.

Hence a cable is almost always a source of reactive power.

The system can measure both reactive power and real power.

The controller can control active and reactive power flows in a transmission line.

Historically, the boundary between these two families was approximately at a reactive power of 200 volt-amps.

In special cases, it may be possible to use exclusively machines for generating the reactive power.

Slack bus - to balance the active and reactive power in the system.