Two charged objects separated by some distance attract each other. if the charges on both objects are doubled with no change in distance between them, what happens to the magnitude of the force between the objects?

Respuesta :

The force of attraction between two charged particles is given by the Coulomb's law which may be written as,
                                  F = k(Q1)(Q2)/(d^2)
If the charges in both are doubled, the expression would be,
                                F = k(2)(Q1)(2)(Q2)/(d^2)
We can conclude that by doing so, the force of attraction is multiplied by 4. 

The magnitude of the force between the objects will be four times the initial force.

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Further explanation

Electric charge consists of two types i.e. positively electric charge and negatively electric charge.

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There was a famous scientist who investigated about this charges. His name is Coulomb and succeeded in formulating the force of attraction or repulsion between two charges i.e. :

[tex]\large {\boxed {F = k \frac{Q_1Q_2}{R^2} } }[/tex]

F = electric force (N)

k = electric constant (N m² / C²)

q = electric charge (C)

r = distance between charges (m)

The value of k in a vacuum = 9 x 10⁹ (N m² / C²)

Let's tackle the problem now !

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Given:

initial force between objects = F

initial charge of the object = q

final charge of the object = 2q

Unknown:

final force between objects = F' = ?

Solution:

[tex]F : F' = k \frac{q_1 q_2}{(d)^2} : k \frac{q'_1 q'_2}{(d')^2}[/tex]

[tex]F : F' = k \frac{q_1 q_2}{(d)^2} : k \frac{2q_1 (2q_2)}{(d)^2}[/tex]

[tex]F : F' = (q_1 q_2) : (4q_1 q_2)[/tex]

[tex]F : F' = 1 : 4[/tex]

[tex]F' = 4F[/tex]

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Conclusion:

The magnitude of the force between the objects will be four times the initial force.

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Learn more

  • The three resistors : https://brainly.com/question/9503202
  • A series circuit : https://brainly.com/question/1518810
  • Compare and contrast a series and parallel circuit : https://brainly.com/question/539204

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Answer details

Grade: High School

Subject: Physics

Chapter: Static Electricity

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