The figure below shows three paths along which we can move positively charged sp
ID: 1953928 • Letter: T
Question
The figure below shows three paths along which we can move positively charged sphere A closer to positively charged sphere B, which is held fixed in place.http://www.webassign.net/hrw/24_02.gif
(a) Would sphere A be moved to a higher or lower electric potential?
lower
higher
(b) Is the work done by our force positive, negative, or zero?
positive
negative
zero
(c) Is the work done by the electric field due to B positive, negative, or zero?
positive
negative
zero
(d) Rank the paths according to the work our force does, greatest first (use only the symbols > or =, for example 1=2>3).
Explanation / Answer
(a) since electric potential is inversely proportional to distance.sphere A is moved to a higher potential
(b) since W=F.ds and our force and displacement are in same direction so work done is positive.
(c)W=F.ds force due to electric field and displacement are in opposite direction so work done is negative.
(d)1=2=3 beacause work depends on intial and final places not on the paths they follow.