Exam 6: Capacitors in Alternating-Current Circuits

Inductive load equipment such as fluorescent light ballasts, power distribution lines, and induction motors all require capacitors to ensure the supply of magnetizing VARs.

The current-limiting effect of capacitance in an ac circuit is called ____________________.

Coils can be viewed as requiring or ____________________ magnetizing VARs.

What is the principle of the conservation of energy?

How is the current, in amperes, in an ac circuit containing capacitance determined?

When is a circuit said to be in resonance?

In ac power systems, an adequate supply of both watts and magnetizing VARs must be available.

Capacitors may be considered as ____________________ of magnetizing VARs.

Describe the power factor of a capacitor.

The principle of the conservation of energy cannot be applied to steady-state ac circuit theory.

Capacitors that are used in either ac or dc circuits have a rating known as the ____________________ voltage.

If a pure inductance is connected to an ac source, the current lags the applied voltage by ____________________ electrical degrees.

A capacitor is charged when an ac voltage is applied to its terminals.

Explain what may happen when a capacitor that is not designed for ac service is used with ac service.

Inductance in an ac circuit causes a countervoltage.