1. (15) Two very large (infinite) sheets of uniform positive charge are created

Question

1. (15) Two very large (infinite) sheets of uniform positive charge are created as shown (shown as lines). The charge densities of the two sheets are the same. A negatively charged particle is placed first at position A, then position B, and finally position C. Draw force vectors showing the force on the negatively charged particle when it is at positions A, B, and C. Place the tail of each vector at position A, B, and C. Make sure the length of the vectors is representative of the relative magnitudes of the forces.

Explanation / Answer

the distance A is more than the distance C from the plates

since the charge is negative and the plates are positive

so it will be attracted towards teh plate but the force at A will be more than at C so the arrow of A is more than C

At point B charge is inbetween the plates so both the plates will attract the charge in opposite direction

net force will be the resultant

force varies with square of r

At point B the charge is very close to second plate, itis not far from the first plate more than the distance A, so force will be maximum at point B so its arrow will be the longest

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