A Point Charge of +35 NC Is Above a Point

question 76

Multiple Choice

A point charge of +35 nC is above a point charge of -35 nC on a vertical line. The distance between the charges is 4.0 mm. What are the magnitude and direction of the dipole moment ?

• A) zero
• B) 1.4 pC · m up
• C) 1.4 pC · m down
• D) 2.8 pC · m up
• E) 2.8 pC · m down

---

Definitions:

Backchannel Cue

Non-verbal or verbal signals used during communication to indicate understanding, agreement, or engagement without interrupting the speaker.

Expectancy Violation Theory

Theory that you interpret the messages of

Emotional Contagion Theory

Theory that emotional expression is contagious; people can “catch” emotions just by observing others’ emotional expressions.

Interaction Adaptation Theory

Theory suggesting that people interact with others by adapting to their communication behaviors.