05.20: A portable radio that is playing is placed inside a screen cage gd-g-j .wdo,1lmv n-h3-ujoo+8 ts f y as shown. jvd3,- sy+ -m-o8.uodgl1h fjgwo -tn When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in electros5:iyy mr m3mh9taticr9yi5 my3mm :hs are 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 has positive chab918 cv2 1mp2ol r7rds+vownnrge + Q. Which graph best depicts the electric potential as a funct8lvr21b 7o p2nmvos19nd cr +wion of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphpr7qd f:i1za0ur;r qk:qv-a 2y2vi(f14a wxhere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the ce1:12yfh avarq0 u:iirv;rfwdkqpq 2z -4 (a7xnter of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius l pbd7nt+x0ao4 w-*bu 0.030 m and initial charge + 6abp x74w* +-d0ln tubo.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 until:

  17.46 Two copper spheres X and Y, with differ-mni 9fly 9i4cent 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 positiveafuv)/ggocpe s*k(3 1 charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential aloe a)*ogfs/ (k cug3vp1ng the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a holloubeeat ; /3s(iwed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from (3i /ause;teb 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 staticcea hz(: 1afcew ;e-+o 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 radiue: c;h1owa( ae-fcze+ s 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 8qq f fggdlbj-1t7 19fa hollowed spherical l9fqdb8q-1 f 1t jggf7region 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 conducting shell has inner radius a and outer radrv 1z 4xqvp-.o8q*kegius 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 qk-ep 81vxzv.r oq *4gdensity on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting she/ 54o0q ytarffll 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 /5to0 4a fyqrfshell, 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 charge +Q and radius R. It is0o+1n xzt7umb 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 pot x1+z7utno0mb ential 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 spaceoqr3c6j x2bx6 . The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that6x6qxcr3 jb2 o 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 des6jcukzw8g:l+ru :h iwtq41 i :cribe physical phenomena. Which one oz:1kq6uil h ij8twur +:gw4: cf the following statements is correct?