The Practical and Preferred Way to Vary the Speed of a DC

question 15

Multiple Choice

The practical and preferred way to vary the speed of a DC motor is by varying the ____ in the shunt field circuit.

• A)rotation
• B)pressure
• C)current
• D)resistance

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Definitions:

Tolerance

The acceptance of an element, habit, or practice without negative reaction, or the body's diminishing response to a substance due to repeated exposure.

Increasing Amounts

A term referring to any situation or parameter that is continuously growing or becoming greater in number, size, value, or volume.

Drug

A substance that has a physiological effect when ingested or otherwise introduced into the body, often used for medicinal purposes.

Gamma Aminobutyric Acid (GABA)

A neurotransmitter in the brain that plays a key role in regulating neural excitability and anxiety.