Two Point Charges of +20

question 13

Multiple Choice

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

• A) 25.2 × N/C directed toward the negative charge
• B) 25.2 × N/C directed toward the positive charge
• C) 25.2 × N/C directed toward the negative charge
• D) 25.2 × N/C directed toward the positive charge
• E) 25.2 × N/C directed toward the negative charge

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Definitions:

Coal

A combustible black or brownish-black sedimentary rock used primarily as a fuel in the production of electricity and heat, formed from plant remains over millions of years.

Oil

A viscous liquid derived from petroleum, used as fuel and in the manufacture of various goods.

Natural Gas

An energy-producing fossil fuel that predominantly contains methane, utilized for heating, cooking, and generating electricity.

Net Energy Ratio

A metric that compares the amount of energy produced to the amount of energy used to produce it.