Two positive point charges are released on a frictionless surface. Which of the

Question

Two positive point charges are released on a frictionless surface. Which of the following best describes their subsequent motion? The particles remain stationary. The particles move apart with constant velocity. The particles move apart with a velocity that decreases with time. The particles move apart with a velocity that increases with time. The particles move apart with a velocity that increases for a while and then becomes constant. The figure to the right shows two positive point charges along the y axis. A third positive charge is located at the point P on the x axis. In what direction does the electric force on the positive charge at P point? toward the positive x direction toward the positive y direction toward the negative x direction toward the negative y direction toward the lower right of the page in a direction between the positive x direction and the negative y direction. toward the upper right of the page in a direction between the positive x directi

Explanation / Answer

Apply Columb's law

F = k q1 q2/r^2

increasing distance decrasing force , due to decrasing force velocity decrease

so when two positive charged are released on frictionless surface , due to the repulsion they move away from each other, due to increasing distance force decreases which results velocity decreases with time

option(c) is correct

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the direction of electric force between the charge placed at the origin and charge at placed at P is along + x direction

the direction of electric force between the charge placed at the y axis and charge at placed at P is along - y axis direction

the resultant electric field is

toward the lower right of the page in a direction between the positive x direction and the negative y direction

option(e) is correct answer

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