05.20: A portable radio that is plh oaq/wv b9h1sb)+g4oaying is placed inside a screen cage as shown. When inside the cage the radio bhgq) ha+s/ 9v4 1wboo stops playing because

  94.21: Which of the following statements about solid conduc26 o*ctflb :dmtors in electrostatics 2d t6lcf *mb:oare 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 radiuskkgk;z5+ d, r(lx/pr c R has positive charge + Q. Which graph best depicts the electrcrpkz/5g xl;(kk +,dric 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 chq/gy ,*vx9r hyarge + Q. Which graph best depicts the electric field as a function of r, the distanr,qhgv x yy*9/ce from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.m+bbvljd c c)zc:/g,5 030 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.,bdzc /jc bg)cl: v+5m Charge will flow in the wire until:

  17.46 Two copper spheres X and aq(43irt4.cah7a k tx 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 i 3 j h7s1kbnf40chic:identical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential al4hi bfjnsc30:h c17ik ong the axis?

  03.50: A solid unchargqj 2 qk))bqgu,r/le. wed conducting 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 is the magnitude or2 u,)lqgb kjqw.q /)ef 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 isolatl(pan+a w+bw. ed 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 .+a ( n+pwbawlat 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 hollowedw7 ;g yh;izoc6 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 center yih;z ;g6 o7wcof the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer radius 2aid.qvey vl3 28. At the center of the shell is located a point charge +Q. What must the excess charge of the shell be in orderd8ey3vli .2v q 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 it. Wj1wf .gp*a* 3zsylmckxm7:n+ .npvf3hich of the following is the correct relationship for the electric potentiafp*:3c*s 7gkz.3mn1anlv .yw m +pxfjl 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 r/4uq5 ip rhp8kyazu /ajgr,(b50js9charge +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 objecrau5u rjz,/ r/5s8(kpaqb y9j gpih04ts 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 ivtd*u e,vlje*3m x5 i6n free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known jxm6l, 3tei5vue*d*vthat 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 )7p iq;4( ,zo 7m(zhjboxwslf physical phenomena. Which one of th4s(p7l )foijz;qm b(h 7 woz,xe following statements is correct?