05.20: A portable radio that is playing is placed u;gpsjl87+ txq ) loz3inside a screen cage as shown. When inside the cage t llq;3jt) 7+8uzgso pxhe radio stops playing because

  94.21: Which of the following statements about s ctt0bi; b) 0cc,,gqqeolid conductors in electrostatics are cbc get)00qi;b,cq t, 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 spheresmw) 4w bmc;-x:ldh p9 of radius R has positive charge + Q. Which graph best depicts the electric potecp49:w;)-b smhw lmd xntial 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 + g4(j;02 i(mok kf(nj 1f vnwnkQ. Which graph4jin2vmk(nj1ok g; w fk0 (nf( best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated co iby(tsxscqid(7/)o ;7ed- thnducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 7x/dbtohy7i ()q et;c ss(d-i2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spherug8ij 8g,:lg/z9 b wpees X and 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 positive charges loqvfsop ie tq7:3bv+2h( u;aj mu-1)tjo v(m-z cated at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potentia jovs+tu2u(qov 7:vb(-q-z jmh1mpi3 e;t a) fl along the axis?

  03.50: A solid uncharged conducting sphere has radius 3-b9zzpbpm2 4*6azu dna 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 zu p-m6pd9a* b 4z2bnzr = 4a from the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in staticc-/yz2)s r8zc: pmkv 7a shu3reu/wm0 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 s3hcpz 2k/ 8rrcwszm:/mua- 0 u )7yvepoint 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 se/ry p5ds+e5a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spher rpes+d e5ys/5es. Taking V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical co uvis0 l/bf..4r661mbgtxauknducting 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 on ta.4klm/0s fv g16b u.xrutb6 ihe inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shp;4k,myy,4zym3w yw jefo;9zj7 gf7 y ell 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, 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. Ay mwoymf yk,eyfz4 y,;9jp4j37 ;w z7gs r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. Ipqb:m,u9e i. )jk h:pht is surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3R. Which of the followingmbq, pj:9:h.pi) ehuk 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 charged conducting shells are in free s0m(-ouce01tq wlx5 0ftpbjtkahg4 5-pace. The outer shell has inner radiusk h5(0wg10a btfxq4c-0-tojeptm 5u l 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 prnyuh ;igj +q;)esented below that attempt to describe physic;u)j+i hq;y gnal phenomena. Which one of the following statements is correct?