05.20: A portable radio thatdwwb +ysksi; 5b61-at. stj f/ is playing is placed inside a screen cage as shown. When inside the cage the rsb.swjwitd /;t 5+ fay b1ks6-adio stops playing because

  94.21: Which of the following st.ju9vz; k8glsatements about solid conductors in electrostatics are tgvzs;8 j.9ul krue?
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 conductiwh ps qb ds9 lvbbdp15639o:o3-oi4ph ng sphere of radius R has positive charge + Q. Which graph best depicts the electric potential as9 d:1ops pb bp3b o6qwios3-4dhh9lv5 a function of r, the distance from the center of the sphere?

  96.36: An isolated conducticu3 -o t7y z0co;bz0.p2pmj lcng sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center op0-ly;omzco0 z.uc cjb3 t72pf the sphere?

  96.21: Two isolated conducting sp vr99sdoem/z,qwe qtq 6d*0 h8heres (S1 of radius 0.030 m and initial charge + sqd,v6o9tqe /w0rd8*9ehq m z6.0 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 andssto9b 3b,c9 wdei0c 9nyg- 2k 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 c /yut*k4d/ccf harges located at points 4 and 6 on the positive x axis. Which of the follc fdy *u/4k/ctowing graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conductiv tvy8* 0o2sd:bfa y0ing 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 of the electric field at the position r = 4a from the center of the spheres as marked in the figub0 i0 fysto8v:d 2av*yre by P?

  11.46: A hollow conducting sphere in q :)mko8yjs qhf kl235static 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 th)y2s3qhk:lkf m 5q8o je 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 a hollp1rdzm kv*oh)jr2v z,6l0 em2owed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , the potemm6ev)h 2z0vo,2k*rrd zljp1ntial at position r =2 a from the center of the spheres is:

  04.50: A solid sphers+0m .d,drn e iyd-3 t/r36k7nse lupiical conducting 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 the inner and outee 373+/e.s ydn ru-ndliisr tm0dk6,pr surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it. Whicia* 55/9d ffm qwnz:7xpzq( xih 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. As r goes to m7f5i5 qdfxqn izwx(/:p z *9ainfinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surroe1-zmx d9htr3unded by a solid spherical shell with charge − Q, innd1eh 9z rxtm3-er 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 amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged conducting shells are izx1, )ok /y/h w8gexjkr3wes1n free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known thwj 3g,ok/ 1 k1ezysrxw)x /e8hat 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 descr9fv2hs(qko5-2s8ff6 jnb 3rbuf iw s h:eqf+:ibe physical phenomena. Which one of the following statements is cse+r:k252h:wfb-fss6 b h 98fnqfqi 3 v(jfuoorrect?