Four Identical Point Charges (+4

question 43

Multiple Choice

Four identical point charges (+4.0 μC) are placed at the corners of a square which has 20-cm sides. How much work is required to assemble this charge arrangement starting with each of the charges a very large distance from any of the other charges?

• A) +2.9 J
• B) +3.9 J
• C) +2.2 J
• D) +4.3 J
• E) +1.9 J

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Definitions:

Fragments

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Heimlich Maneuver

An emergency technique used to expel an object from the airway of a person who is choking.

Choking

The obstruction of the upper airway by food or other objects, which can block airflow and cause a serious emergency.

Cardiopulmonary Resuscitation

An emergency procedure combining chest compressions with artificial ventilation in an effort to manually preserve brain function until further measures are taken to restore spontaneous blood circulation and breathing in a person in cardiac arrest.