05.20: A portable radio that is playing i g3a3mif,da i(s placed inside a screen cage as shown.3 fda ga,3(imi When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conduc95(xibfv *:bhrw 8rv 5vyh;cgtors in electrostaticbgvc5rv8 5hvx ;:w*irh9y f( bs 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 charge + Q. W8askz8zqb*fs9z; .us i3+jxs hich graph best depicts the electric potentias. zbx a3usqis*zzsj+9 ;8f8kl as a function of r, the distance from the center of the sphere?

  96.36: An isolated condumn.jp- dkp5 n/cting sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, thep.5dp/-knn m j distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 s 1dokz wb:*,lof radius 0.030 m and initial charge + 6.0 nC kdls* 1,zwob :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, wi v9klcfd)3z. q gf6x6:x(gp ugth 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 located at poin 9 lixzcc63uj8ts 4 and 6 on the positive x axis. Which of the fo3x9cl6u8izcj llowing graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sph/4nv+hgl 1exx(s1ff iof.i ;gere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a positfie xxfh ( og. 1n/4isfvgl;1+ion a distance 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 i9 8gm5ag9hkzvw5mh. +pyhb1w n static 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 interiw1.hkp8 gm+zy9gh5wh 9b vma5or 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 g)/t5hpwylt *sphere of radius 3a contains a hollowed spheric)hpgt wyt*5l/al 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 spheres is:

  04.50: A solid spherical conducting shell has inner r *- wee7+7 usw,wwwn7 vqx;kgaadius 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 the inner and outer surfaces of the shell to be exactly equalenxeuqgww;7ksw7- a ,7+ *wvw?

  05.45: A spherical conducting shell has a :lrd1 p/fepz( 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/per(1fldz:p R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conoe1-a8qrh ,pbe)bzw. ductor 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 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 amoahob8.-e) b,wr q1pezunt and all distances are from the center of the inner sphere.

  15.48: Two concentric charged conductij ,oukw/ p,:w,qb drmp kk7(h5ng shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric potential atuwbd,k/pq7pkr w (,mo k5:,hj $r=3a$ 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 stateo,,br-i88r r odf jzs(ments presented below that attempt to describe physical phenomena. Which one of the foll(-rio,,8 srrozf 8 djbowing statements is correct?