The Functioning of an Electric Motor Depends on the Fact

question 15

Multiple Choice

The functioning of an electric motor depends on the fact that

• A) like charges attract, unlike charges repel.
• B) like magnetic poles attract, unlike magnetic poles repel.
• C) an electrical current produces a magnetic field.
• D) permanent magnets are always stronger than electromagnets.
• E) all motors must have several electromagnets.

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Definitions:

Open Sentences

Statements in mathematics that contain one or more variables and can be true or false depending on the values of these variables.

Scope

In discussion or analysis, scope refers to the extent or range of view, outlook, application, operation, or effectiveness of a subject.

Truth-Functional Compound

A complex statement whose truth value is determined by the truth values of its component statements and the logical connectives that combine them.

Symbolize

To represent something else by association, resemblance, or convention, using a symbol.