# Ranking forces between charged particles

• awilliam_3
In summary, the conversation discusses ranking the forces between charges of different magnitudes and distances using the Coulomb attraction formula. The correct sequence, from smallest to largest, is A, B, E, C, D.
awilliam_3

## Homework Statement

Two charges with magnitude (Q) experience a force (F) when held a distance apart. Rank from smallest to largest the forces between charges of the following magnitudes (q), held the following respective distances (r) apart. (There may be ties.)

A) q= Q/3 r= R/3
B) q= 2Q r= R/2
C) q= 2Q r= R
D) q= 3Q r= 3R
E) q= Q/2 r= 2R

E = K [q1 / d^2]

## The Attempt at a Solution

I attempted to use E = q1 / d^2 ; inputted values ; for example, for (A): [(Q/3)/(r/3)^2] = 3Q/r^2

I did not get the sequence correct.

Don't compute the E field. Use the Coulomb attraction formula instead.

rude man said:
Don't compute the E field. Use the Coulomb attraction formula instead.

Oh good grief of course. Thank you.

## 1. What is the force between two charged particles?

The force between two charged particles is known as the electrostatic force, which is a fundamental force of nature that describes the attraction or repulsion between two charged objects. This force is caused by the exchange of virtual photons between the particles.

## 2. How is the force between two charged particles calculated?

The force between two charged particles can be calculated using Coulomb's Law, which states that the force is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them. The equation for Coulomb's Law is F = k(q1q2)/r^2, where k is the Coulomb's constant, q1 and q2 are the charges of the particles, and r is the distance between them.

## 3. What factors affect the strength of the force between two charged particles?

The strength of the force between two charged particles is affected by two main factors: the magnitude of the charges and the distance between them. As the magnitude of the charges increases, the force also increases. However, as the distance between the particles increases, the force decreases.

## 4. How does the force between two charged particles change if one of the particles is moved?

If one of the charged particles is moved, the force between them will change. The force is inversely proportional to the square of the distance between the particles, so as the distance changes, the force will also change. If the distance between the particles increases, the force will decrease, and if the distance decreases, the force will increase.

## 5. Can the force between two charged particles be attractive and repulsive?

Yes, the force between two charged particles can be either attractive or repulsive. This depends on the signs of the charges of the particles. If the charges are of the same sign, the force will be repulsive, and if the charges are of opposite signs, the force will be attractive. The direction of the force is determined by the direction of the electric field between the particles.

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