05.20: A portable radio that is playnchn*bwf 5*ktdz . i)j3za;39 lo6-pwdoim5oing is placed inside a screen cage as shown. Whenpdl *;o hij3kzobwoz5cn wifm9t )35 *.d6an- inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in .d0 jv x6gk.z xp+3uakelectrostatics are t+ .xvz30x.k k a6pdugjrue?
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 radius R has positivex0dzjyn3,lsy-k9)1 ap 3lz+4 evua9jdt.o wv charge + Q. Which graphan ztjjs339z,. 4 oydda-9 vvl kl 0pwe1u+)xy best depicts 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 positib kk*bh:w7)q*md /vmh ve charge + Q. Which graph best depicts the electric field as a function of r, the dista m*k v7*wdhqb/ mhkb:)nce from the center of the sphere?

  96.21: Two isolated con*a-5 -atsfun8t-b tu yducting spheres (S1 of radius 0.030 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. Charge will flow in the wire untiluy- 8 ntta-tsfa5b*-u :

  17.46 Two copper spheres X anhxhv ay9 x;88u. 4 8xsbg*ktfpd Y, with different 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 pos7yi ,afek0 h-titive charges located at points 4 and 6hk aie7-yt,0 f on the positive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged condbxed gfet3. -2ucting sphere has radius 3a contains a hollowed spherical region xe2dbe-3 g. ftof 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 marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is qs xvv8b9 p.azlu*,e*isolated in deep space with a*xp*ea, .zul 8svvb q9 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 the 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 hollowed sk4y1,39kccpkje 4 bqgr-/ gqt*m; toaphert 9g;t /1 e3kqbckrqm,yg4j c-o4 *pkaical region of radius a. A point charge +Q is placed 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 c4-,k yh3ce269s1gbss bqg ve zonducting shell has inner 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 okq26 h31,b9sscegvsebz4 -gy n the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shellne2-p( go.7rqlxb8h(kcx . j k.tdv6x has a net charge +Q placed on it. Which of the following is the correct relationship for the electric potential at the points labeled A, B, and2x( x.-pqjgh 8x. ntkk v7loeb.c( rd6 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 charge8 j-ydlrtogo ra4t5 64 +Q and radius R. It is surrounded by a solid spherical shell 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 Point6 ot-8ry5to4dg aj 4rl 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 charged conducting shellsp0kwfn ) bq 5p02)4aj1 w,kgnm:ax lxq are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radiul np 041nfxk)gpq a5j,k:0xwbqm 2wa)s 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 presented below that attempt to +ks *u0 u;9ivd .gppsd1 i*lipdescribe physical pp*pkg1pd ;ssidu l0ui *iv+.9henomena. Which one of the following statements is correct?