Ch. 27 questions

A transformer in which the primary and secondary windings are physically separated and not connected by a conductor is called a step-down transformer.

False

In a transformer, the turns of primary wire compared with the turns of secondary wire is known as the isolation ratio.

False

The amount of current that flows into a transformer primary when voltage is first applied is called inrush current.

False

The primary winding of a transformer is the power ________ winding.

Input

Any transformer flux that does not follow the core and escapes into the surrounding air is known as flux leakage.

True

The magnetically operated device that can change values of voltage, current, and impedance without changing frequency is the transformer.

True

________ transformers change the high voltage of power company distribution lines to the common 240/120 volts used to supply power to most homes and many businesses.

Distribution

The ________ current is the amount of current required to magnetize the core of the transformer.

Excitation

Transformer ________ is determined by calculating the percentage of variable voltage as compared to the rated voltage of the high-voltage winding.

Impedance

Because the transformer is a(n) ________ device, the secondary current lags the secondary voltage by 90 degrees.

Inductive