Question

Дві однакові маленькі металеві кульки мали заряди 16 мкКл і 4 мкКл та розташовані на відстані 0,5 м одна від одної. Кульки з’єднали на короткий час провідником й знову розвели на таку саму відстань. Чому стала дорівнювати сила їх електричної взаємодії?

Answer 1

Тому, що вони обмінялися одне з одним електричним зарядами так, щоб у них їх було порівно

Answer 2

Explanation of Electric Force between Charged Spheres

When two identical small metal spheres with charges of 16 µC and 4 µC are placed 0.5 m apart and then connected by a conductor for a short time before being separated again, the electric force between them changes. Let's explore the reason for this change.

The electric force between two charged spheres can be calculated using Coulomb's law, which states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Initial Electric Force: The initial electric force between the two spheres can be calculated using Coulomb's law: \[ F = \frac{k \cdot |q_1 \cdot q_2|}{r^2} \] Where: - \( F \) = electric force - \( k \) = Coulomb's constant (\( 8.9875 \times 10^9 \, N \cdot m^2/C^2 \)) - \( q_1 \) and \( q_2 \) = charges of the spheres - \( r \) = distance between the spheres

Change in Electric Force after Connecting and Separating: When the spheres are connected by a conductor and then separated, the charge redistributes between them. This redistribution of charge affects the electric force between the spheres.

After the spheres are separated, the charges on each sphere will be different from their initial values. The final charges on the spheres can be calculated using the principle of conservation of charge.

The final electric force between the spheres can then be calculated using the new charges and the same distance.

Conclusion

The electric force between the spheres after they are connected and separated will be different from the initial force due to the redistribution of charge. The final force can be calculated using the new charges on the spheres and the same distance between them.