05.20: A portable radio that is playing is placed insidezbx43z- 4(e qv:ft(p jgdt5uh a screen cage as shown. When inside the cage 4e -z q4(t3 gvhpz:f x5jubtd( the radio stops playing because

  94.21: Which of the following statements about solid conductors in electrostati9)mjn 5y ip;z6ci l3pbcs are true9 zmlp6cin pbi)j5y;3?
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 spherj,3w*j. n6:vlm yl4g rc:v ofve of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the ce:g6ncw,vlj *3fovl 4.r myj:vnter of the sphere?

  96.36: An isolated conducting sphere of radius R has positivv;d3* vt(xsqge charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of the sphere?(qdv;v*g 3tsx

  96.21: Two isolated conducting spheres (S1 of radip0mynao 7a7 z:y c pu3 (/1ysmjm3m*zyus 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 w1( mup /nzyc7maa7zy0:3pmy3o *j my sire until:

  17.46 Two copper spheres X and Y, with different radii (hp( iw 7v:xgz;$R_x>R_y$) 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 located at posps 1,-mxm dw2pn2: cvints 4 and 6 on the positive x axis. Which of the following graphs best represent the elesmp1c2m2-v ws:,px dnctrical potential along the axis?

  03.50: A solid uncharged conductif1z ,2qo t91o2d ksrf;8rx5h ivn-ytgng sphere has radius 3a 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 sthr2ft1o1k y92f8vd5zr;o ,-gx n q iis 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 isolated inu)x x-m3 (ytb3x(ldlt,ks: lp -y0 smq6*tvmm 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 xktl my(v ysxu*3dsm 6 qx mtlm,t0-3p -(bl):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 7drq 74tiqjv*-wvfz 2a hollowed spherical 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 f 2d vz-rqqi j7w7t*v4center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer radiust5*,1l rg*v7j h 3y ivqhpj;nz 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shell be in ordj1 hytzv*35hv*,iqr gn;jl7p er for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has vx bv 9. scrxkoi);i.2a net charge +Q placed on it. 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 distancexr9).iv b.svki;x co2 R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical cbo, 5 wjjxdh-n*p2m5 gonductor has charge +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 andx5*gjomnbp52,j w -hd 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 charged conducting shells are in fjq 8 36 jvzqince)qd475ytb 1eree space. The outer shell has inner r 6jc3 tq7y1i5d8) qjqnveez4b adius 2a and outer 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 describp5m1x 6 )n 1e9uv*uiuf5mnd(apwn.xhe physical phenomena. Which one of the following 5 *161 m iudp(puw)n9nf. hn5m xeuvxastatements is correct?