Suppose you put positive charge on an insulated metal box(actually, remove electrons from the box). Since it is a conductor,the charges will rearrange.
- The greatest accumulation of charges will be

nowhere- the charges willbe uniformly distributedon the inside, in thecenter of an edge    on the outside, atthe cornerson the outside, in thecenter of an edgeon the inside, at thecenter of a sideon the inside, at thecornerson the outside, at thecenter of a side

- The electric field inside the box will be

greatest in the center ofthe box zeroeverywhere    non-zero, the sameeverywheregreatest near the center ofone of the edgesgreatest near the center ofone of the sidesgreatest near one of thecorners

2. Suppose identical metal spheres are insulated from theirsurroundings and touching each other. A positive charge is broughtnear, but not touching sphere A, and held near to sphere A as the two spheres areseparated. Now, the positive charge is removed. What charge will beleft on sphere A and sphere B, respectively?

A isnegative, B is positiveA is positive, B ispositive    A in neutral, B isneutralA is neutral, B ispositiveA is positive, B isnegativeA in negative, B isneutralA is negative, B isnegativeA in positive, B isneutralA is neutral, B isnegative


4. A pith ball isa small ball covered with a conducting metal foil. Suppose pithball A is charged negatively.
-First, pith ball A is brought near neutral pith ballB.
-Then, the two pith balls touch and are separated.

a)Which is true of the charges on the two pith balls?

Before they touch they haveno effect on each other, after they touch they have no effect oneach otherBefore they touch theyrepel, after they touch theyattract    Before they touch theyattract, after they touch they have no effect on eachotherBefore they touch theyrepel, after they touch they repelBefore they touch theyattract, after they touch they attractBefore they touchthey have no effect on each other, after they touch theyrepelBefore they touch they haveno effect on each other, after they touch theyattractBefore they touch theyattract, after they touch they repelBefore they touch theyrepel, after they touch they have no effect on eachother

b)Before they touch, ball A is negative and ball B is positive. Afterthey touch

A isneutral, B is positiveA is positive, B ispositive    A is positive, B isneutralA is negative, B ispositive A is negative, B isnegativeA is neutral, B isneutralA is positive, B isnegativeA is negative, B isneutralA is neutral, B isnegative

Help will beappreciated! Thank you!