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The ____________________ of a system is the ratio of the power output to the power input.

____________________ is the product of voltage and current in a circuit and is calculated without considering the phase shift that may be present between the voltage and current.

Some electrical equipment cannot be used with an aluminum conductor.

__________ is the formation of film on contact surfaces.

The most widely used form of energy for transmission is __________.

A factor that does not affect the resistance of a conductor is the __________ of the conductor.

The Greek symbol “Ω” represents the ____________________.

A(n) ____________________ is the number of electrons passing a given point in one second.

The __________ is the negatively charged particle of an atom.

Static electricity has some limited practical uses, such as in electrostatic spray-painting and electrostatic air filters.