Three Pith Balls Supported by Insulating Threads Hang from a Support

question 2

Multiple Choice

Three pith balls supported by insulating threads hang from a support. We know that ball X is positively charged. When ball X is brought near balls Y and Z without touching them, it attracts Y and repels Z. Since pith is an insulating material, we can conclude that

• A) Y has a negative charge.
• B) Z has a negative charge.
• C) Y has a positive charge.
• D) Z is neutral (has no net charge.)
• E) Y is negatively charged or neutral (has no net charge.)

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Definitions:

Type A Personality

A personality type that is hardworking, scheduled, and impatient.

Hardworking

Characterized by diligent and resilient effort or exertion towards achieving goals and completing tasks.

Scheduled

Planned or appointed to occur at a specific time or date; organized in advance according to a timetable or agenda.

Type A Personality

A temperament characterized by high levels of competitiveness, self-imposed stress, impatience, and a sense of urgency.