A Charge of +3

question 50

Multiple Choice

A charge of +3.0 μC is distributed uniformly along the circumference of a circle with a radius of 20 cm. How much external energy is required to bring a charge of 25μC from infinity to the center of the circle?

• A) 5.4 J
• B) 3.4 J
• C) 4.3 J
• D) 2.7 J
• E) 6.8 J

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Definitions:

Price

The amount of money required to purchase a product or service, set by the interaction of supply and demand.

Perfectly Elastic

A market situation where a small change in price leads to an infinite change in the quantity demanded or supplied.

Supply Curve

A graph depicting the relationship between the price of a good and the quantity of the good that suppliers are willing and able to sell, typically upward sloping.

Price Elasticity

A measure indicating the degree to which product demand is affected by price shifts.