Consider two concentric conducting spheres. The outer sphere is hollow and initi
ID: 1784980 • Letter: C
Question
Consider two concentric conducting spheres. The outer sphere is hollow and initially has a charge Q-9 deposited on it. The inner sphere is solid and has a charge Q2-3Q on it "(a) How much charge is on the outer surface! You currently have o s timissions for this question. Only 10 submission are olfowed. mm. You can make 10 more sbmissions for this questlon. "How much charge is on the linner surface You currently have O submissions for this question, Only 10 submission are allowed You can make 10 more submissions for this question. (b) Suppose a wire is connected between the inner and outer spheres How much charge is on the outer surface of the outside sphere? You currently have O submissions for this question. Only 10 submission You can make 10 more bmissions for this questlon. How much is on the inner surface? Q How, i at all, does the electric field at the surface of the inside sphere change when the wire is connected You currently have O submissions for this question. Only 10 submission are allowed You can make 10 more submissions for this question (c) Suppose we return to the original conditions in (a), with 3Q on the inner sphere and -9Q on the oter. We now connect the outer sphere to ground with a wire and then disconnect it. How much total charge will be on the outer sphere Olt changes from a finite value to zero. Q Olt changes from a finite value to a lesser nonzero finite value. Q Olt changes from a finite value to a greater value. Q Olt does not change at all. Q You currently have O submissions for this question. Only 10 submission are alfowed You can make 10 more subemissions for this question. "How much charge wil be on the inner surface of the outer sphere? You currently have 0 submissions for this question, Only 10 submission are allowed. You can make 10 more sbmissions for this question. How much will be on the outer surface of this sphere You currently have O submissions for this question. Only 10 submission are alfowed. You can make 10 more omissions for this question.Explanation / Answer
a) -6 Q
inner sphere will induce a charge of -3Q on the inner surface of the outer shell, this causes a flow of +3Q to the outer surface, net charge on outer surface = -9Q +3Q = -6Q
b) -3Q induce by the inner sphere.
c) when connected to ground all the excess charge on the outer surface will flow to the ground. i.e -6Q. when disconnected. there is essentially 0 charge on the outer sphere.
charge induced by the inner sphere -3Q on the inner surface and +3Q on the outer surface of the outer sphere.
d)