Copper Contains 8

question 17

Multiple Choice

Copper contains 8.4* 10²⁸ free electrons/m³. A copper wire of cross-sectional area 7.4 *10^-7 m² carries a current of 1 A. The electron drift speed is approximately:

• A) 3 * 10⁸ m/s
• B) 10³ m/s
• C) 1 m/s
• D) 10^-4 m/s
• E) 10^-23 m/s

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Definitions:

Hyperactive

Characterized by more movement and activity than is typical or desirable, often to the point of being disruptive, as in certain attention disorders.

Disruptive Mood Dysregulation Disorder

Disruptive Mood Dysregulation Disorder is a mental health condition characterized by severe and recurrent temper outbursts that are disproportionate to the situation.

Major Depressive Disorder

A mental health disorder characterized by persistent and intense feelings of sadness and despair that affect functioning.

Mania

A hyperactive, wildly optimistic state in which dangerously poor judgment is common.