What is common about the strength of Electric force and Gravitational force? Que

Question

What is common about the strength of Electric force and Gravitational force?

Question 34 options:

their magnitude varies as the square of the distance from the source of the field.

their magnitude varies as the inverse of square of the distance from the source of the field.

their magnitude varies as the cube of the distance from the source of the field.

None of the others are true

their magnitude varies as the square of the distance from the source of the field.

their magnitude varies as the inverse of square of the distance from the source of the field.

their magnitude varies as the cube of the distance from the source of the field.

None of the others are true

Explanation / Answer

Coulomb's law states that the electrostatic force is directly proportional to product of the two charges and inversely proportional to square of the distance between the two charges.

F=kq1q2/r^2

From the Newton's gravitational law, the gravitational force is directly proportional to product of two masses and inversely proportional to square of the distance between the two masses.

Fg= m1m2/r^2

Hence , second opinion is correct.

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