05.20: A portable radio that is playing is placed inside a screen cage as shoq sm0jc. vah5jvk0 5k.wn. When ins jk.avsjh m50k. 0c5vqide the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in ele uv8zn q1wam2)ctrostatics are8w avq2nu )1mz true?
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 hh77-f0zhmyhky -cwo67v h a-ras positive charge + Q. Which graph best depicts the electric potential as a function of r, the disth7y0h6h- mv-yz7r-kwa f oh7cance from the center of the sphere?

  96.36: An isolated conducting sphere ofdfda1z jt.; u*m jgn6b;1yzy5 radius R has positive charge + Q. Which graphjuza51jm.z 6tb*;;fdg ny1 yd best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and init c v g1ymlp7 mj,z*e5lu+ec*vq+gp*6xial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connegx*5p*jem vg z6p,ll*c 7yevqum+ +1 ccted by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, ;5zctm g( 3to5.qmfz ywith 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 positive charges loca99j(i cceh7xk*xl p h7ted at points 4 and 6 on the positive x axis. Which of the following graphs best i c79k*l cejxhhp7(9xrepresent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radiuxp)ziyn. + ,zp,bfaoo6/sv+ t6vv0j us 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance z6vpy,of/ x b+6a+itn)0z u. ,ovpsjv 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 equiliba/m xv60 39jdgplxjn8ci 1ioo2g5z ;i rium is isolated in deep space wit9o mjia5cvx62g8p /xlg j3z1n0doii; h 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 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 bmm8ou 63c/h pc cn)n1spherical 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 spher6nhon) bm cc1 /ucp8m3es is:

  04.50: A solid spherical conducting shell has/4 c 2*zxz).qri:olizshlw9dh lh25x inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the exce2q9:zsx* 542ih)cxllzo wihrlh /.z dss charge of the shell be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on u lj;f9 (a-8m dhb*trcit. Which of the following 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. ub8ac;l-hf jdt*9m(r As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q-u b8*u;f x vq00:runzif:ewu 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 Point C is located at r :v-:buiux008ew;fur uqz*f n =2R − δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentricq ttq40)i v q9 e8vy*libprfp-b v)z9: charged conducting shells are in free space. The outer shell has inner radius 2a and oute8:tvi*tbi 49qlqvv9z )qpp- 0rf) yebr radius 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 presented below that attempt to describe m.;fpd -f 4q:bkgrm :x njrk-j)j)zu2 physical phenomena. Which one -mfzrnd:g;pjk bj))-ur m2. : fkxq4jof the following statements is correct?