19
QuizMultiple Choice

Electricity — Test

Question 19 • Physics

Which best explains how the constants affect the electrical and gravitational forces?

Answer
A
The electrical force is much smaller than the gravitational force because 10 to the 9th power is much greater than 10 to the negative 11 power.
B
The electrical force is much smaller than the gravitational force because 8 point 9 9 is much greater than 6 point 6 7 .
C
The electrical force is much larger than the gravitational force because 8 point 9 9 is much greater than 6 point 6 7 .
D
The electrical force is much larger than the gravitational force because 10 to the 9th power is much greater than 10 to the negative 11 power.

Explanation

In Coulomb’s law, the electrical-force constant is about 8.99 × 10⁹, while the gravitational constant is about 6.67 × 10⁻¹¹. The electrical constant is vastly larger, so for the same charges and masses, it makes the electrical force much larger than the gravitational force. Therefore, the best choice is that 10⁹ is much greater than 10⁻¹¹.

AI-written and checked against the verified answer.

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