The Join Operation

question 76

Multiple Choice

The join operation

• A) combines relational tables to provide the user with more information than is otherwise available.
• B) identifies the table from which the columns will be selected.
• C) creates a subset consisting of columns in a table.
• D) organizes elements into segments.

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Definitions:

Brushes

Stationary devices used to conduct current to or from a rotor in electrical components such as alternators and motors.

Slip Rings

Stationary devices used to conduct current to an alternator rotor.

Stator Windings

The wire coils located in the stator of an electric motor or generator that create a magnetic field when current flows through them.

Field Windings

Field Windings are coils of wire within electrical generators or motors that create a magnetic field when current is passed through them, essential for the induction of voltage in generators or the creation of torque in motors.