Asmall styrofoam ball with a layer of metallic coating is lowered into the gap between two large metal plates. a large potential difference v is kept between the two plates. what will be the motion of the styrofoam ball

ball will oscillate in between the plates

Explanation:

The metallic coated styrofoam lowered in between two large metal plates, a large potential difference V is kept between the two plates, will experience a force of repulsion ( because both plates and balls will have similar kind of charges and like charges repel each other)  from the opposite plates.

If we consider d as the distance between the plates, E as electric field because of Potential difference V. Then force F experience by the ball will be

where q be the total charge on the metallic coated ball.

clearly,  since, both the plates will repel the ball in opposite directions, hence ball will be in oscillate in between the plates.

X rays

Explanation:

doctors use x rays to look at your bones

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