Question 7 5 pts Imagine we positively charged a small area at the center of a s

Question

Question 7 5 pts Imagine we positively charged a small area at the center of a solid conducting sphere. We learned in the class that these positive charge must move to the surface of the sphere upon achieving the equilibrium. However, we also learned in the class that in a solid the positive charges(ions) are immovable; they are fixed to the lattice structure. This seems to be contradicting. What statement explains this? We were mislead; positive ions can also move freely in a conductor We were mislead; there are free positive ions in metals During the transition to equilibrium, free electrons gadually move invard thus leaving atoms with vacant electrons (positive ions) finaly at the surface Atoms in a solid are free to move throughout the volume of it None of the above

Explanation / Answer

Well in a conducting sphere there are many free electron which can move in the volume of solid sphere.

When we positively charged the small area at center, the electrons will be attracted toward it. Thus they will move toward the lositively charged centre, leaving behind equal positive charge.

No doubt the positive ion will not move at all.

So the correct answer is -

During the transition to equilibrium, free electrons gradually move inward thus leaving atoms with vacant (positive ions) finally at the surface.

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