05.20: A portable radio that is playing is placed insiqdbesps4).yqpp (sjl q h *1;1de a screen cage as shown. Whens bhyq (p1se;pq*)ld.1qp4j s inside the cage the radio stops playing because

  94.21: Which of the fol yscfc6d5q r;ek0xh(6lowing statements about solid conductors in electrostatics are try c6 5;fdq(shker 6xc0ue?
I. The electric field inside the conductor is always zero.
II. The electric potential inside the conductor is always zero.
III. Any net charge is on the surface.

  95.07: An isolated conducting sphere of r2gi nk kc1no, hyqrx*w1; d6jq; a1*xcadius R has positive charge + Q. Which graph best depictsio *nqxr w2d16*cn ; ;qkc,k hax1jg1y the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + (c13t+vm:gnimytc fw5fx. (m Q. Which graph best depicts the electric field as a function of :m 5gfvc 1i+mxyt(cn.ft ( 3mwr, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.0w*6,)jl0 ri6wavvwf l30 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. i,0w)lralvjw66 *w vfCharge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different ;k2d w.ui40w/6ipq4 qw qccyj radii ($R_x>R_y$) and equal excess charge +Q, are placed apart from each other. A scientist using insulating gloves connects the spheres with a copper wire. Which one of the following choices best describes what happens after the connection is made?

  03.43: The diagram shows two identical pot3ebv5 c vab-4sitive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the elevae3b4b vt-5c ctrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3ez-mdit 2:4bsep a9k xoq 5(r8a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common center of the spheres. What is the magnitude of the electric field at the position r = 4a from the center of the spheres as q me52 bz8kp dei9 4-:tso(axrmarked in the figure by P?

  11.46: A hollow coaqe mb9*:p,h-1hn 6u xgua c.pnducting sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at the position labeled P shown in the interior of the figure? The sphere has radius R=3a and the point of interest is at a location r=2a from the center of t6u9xm uahn,*gbq c.pe ph- 1a:he sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius 3a contains a hol38w9u d e01 d* zwfqqwnqv wca,2,fk;plowed spherical region of radius a. A point charge +Q is plaff3 ap e,1*knzq;9 ww2qdcwd ,wv08q uced at the common center of the spheres. Taking V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has innesx 8 fmk;:8uku1(ntto r radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shell be in order for the charge density on the inner and outer surfaces of the shell tk u:t(fkn 8; oxsu18tmo be exactly equal?

  05.45: A spherical conducting shell hmb9brt 2+lyy+as a net charge +Q placed on it. Which of the 9r+y2tml +ybbfollowing is the correct relationship for the electric potential at the points labeled A, B, and C? Point A is at the center of the sphere, point B is at the surface of the shell, a distance R from point A, and point C is a distance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge f8 fi1.odpp .c+Q and radius R. It is surrounded by a solid spherical shell ifd o1.p8cfp. with charge − Q, inner radius 2R, and outer radius 3R. Which of the following statements is true for the labeled points in the diagram? Assume these objects are isolated in space and that the electric potential is zero as the distance from the spheres approaches infinity. Point A is at the center of the inner sphere, Point B is located atr= R + δ, Point D islocated atr =3R+ δand Point C is located at r =2R − δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric chargsxiy;xv7 k.ok*i.f9d ed conducting shells are in free space. The outer shell has inner radius 2a and outer rid x kfiy;skv .*.9xo7adius 3a. The inner shell has radius a. It is known that the electric potential at $r=3a$ is $V_{3a}=\frac{kQ}{3a}$ . If the electric potential $V_a$ at $r=a$ is 0 volts, what is the charge on the inner spherical shell
$Q_in$?

  14.35: There are several statements fd*-u4 qkyck1presented below that attempt to describe physic-4ukfkdy *1qcal phenomena. Which one of the following statements is correct?