Question

15: For each situation, draw (approximately) the charge distribution on the object(s). Explain your answers if needed. A: A solid neutral sphere. B: A solid negatively chargedlsphere. C: A negative point charge (-Q) is brought near a conducting solid neutral sphere. Qualitatively draw the resulting charge distribution on the sphere. Explain your answer. -Q D: A positive point charge is placed (magically) at the center of a neutral conducting spherical shell. +Q

Answer 1

Concept: A charged body can be either positive or negative. Now if a body is negatively charged, it means that it has excess of electrons. But a positively charged body has list electron.

Next: whenever a charged body is brought near a neutral body, the neutral atoms either lose their electrons or gain electron from nearby atom until equilibrium is reached. And we will have equal amount of both positive and negative charge.

For example:

• In question C) the negatively charged body repels the electrons from the neutral sphere ( which are close to it). And this electrons move to the farthest distance i.e. the opposite side of the sphere. So this is called charge induction.
• In D) the inner positive charge pulls electron near the inner surface and equal amount of positive charge is produced, which occupies the outer most surface to require the electrostatic force is repulsion.

Note: the amount of charge induced is equal to or less than the inducer charge. It depends on the type of material of sphere.

Concept: A charged body can be either positive or negative. Now if a body is negatively charged, it means that it has excess of electrons. But a positively charged body has list electron. Next: whenever a charged body is brought near a neutral body, the neutral atoms either lose their electrons or gain electron from nearby atom until equilibrium is reached. And we will have equal amount of both positive and negative charge. For example: Bullet In question C) the negatively charged body repels the electrons from the neutral sphere (which are close to it). And this electrons move to the farthest distance i.e. the opposite side of the sphere. So this is called charge induction. Bullet In D) the inner positive charge pulls electron near the inner surface and equal amount of positive charge is produced, which occupies the outer most surface to require the electrostatic force is repulsion.

Hope this helps