05.20: A portable radio tha 6 hs jf4ancn; ndih.3:fs9xr9t is playing is placed inside a screen cage as shown.4.n s9ifrhs: n96 3chdf janx; When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in electro6es cw7c(l *dmstatics acdmcw6 7(esl*re 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 hgwc .q)gul;l (d 59,fj*xuh (apcy+ geas positive charge + Q. Which graph best depicts the electric potential as a function o*xg (c)9ll+,a .yc d;( pguugeqhj w5ff r, the distance from the center of the sphere?

  96.36: An isolated conducting s,h s70 dqbaa +34uaf ny90wpjwphere of radius R has positive charge + Q. Which graph best depicts the electric field as a functn0 9ywua+ds0p4bq ,ja 3fh7w aion of r, the distance from the center of the sphere?

  96.21: Two isolated cw57vkq igc /(jm c:or7onducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge +5k(ovw:jr/qi7 m7gc c 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres,bhdkl .b9d 08 ecgi;a 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 chargesfjs:mm/ -koq gpg: 1 p7:1axnu located at points 4 and 6 on the positive x axis. Which of m p1-msqk/xggja:n u:: 7ofp1the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a17fr elmzffw/ffjng0(9 c.c 9 contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common lz/g1cc.(f0 frf7f9 jfen9 w mcenter 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 static equilibrium is isolj,shn..pf vcnspdt4)k+ q;4 h ated 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 .ns c4k)hdphtvj ;+4qf. sn,pR=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 a hollowed si, mb a8sqm9z*h.x*mppheri*m8,xsq phbmi m a*9z.cal 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 radius oxu9fse 0s-6sn4r z-ja and outer radius 2a. At the center of the shell is loca -srn9jse 6-0fosu4z xted 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 equal?

  05.45: A spherical conducti7ou ,j0x x:nmm+)ogk jng shell 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 dj)m,kn0ou + :gxm xjo7istance 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 cn)9ca c)z;dvhb n1 ivs9./c0bpeey3 n onductor has charge +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner rad/db nspc0 na9)1 3ebz ec 9inyvchv.;)ius 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 ip p p8x 11124lb*,e hwddwpagxn free space. The outer shell has inner radius 2a and outer radius 3a. The i e dppwh1l8 g 1xda2b4*,p1xwpnner 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 sever7pi 2 2dnrva,s-nwamu yn) j:*(z:aqcal statements presented below that attempt to describe physical phenomena. Which one of:2unsi7c,qam pn yawjzv() n: rda*2- the following statements is correct?