05.20: A portable radio that is playing is placed inside a screen cage as sjo1fu4 k e(is 6h9kyc2hown. When inside t9o(y u6kh4je2sik f1c he cage the radio stops playing because

  94.21: Which of the following statements about solid conduct ki.t+: qz;(p n(dulaeors in electrostatics are trk:dtn((e. zqau ; il+pue?
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 tn z 6 pdeiy7rm83vrx8ag7b5un2/s )1rpgf. qradius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the d3 m 68f ppnner/a2r7g.1yr b gq)udxsi8vz5t7istance from the center of the sphere?

  96.36: An isolated conducting sphere of radius Rpt msqg*9f9 zj0,a 3r/jks x5h has positive charge + Q. Which grasjm f9j,rqkpa05 s * x9gtz3h/ph best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and init3lpp7f-)f9sk .saz7zdtu *6r-gt na zial charge + 6.0 nC andk- s.rfu- )p6nz padtagz7f 3sl9 zt7* 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 andxdf o3 p/ 68w/ jyzpu67wok8hk 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 charges located at points ulhv-*y(8l xh 4 and 6 on the positive x axis. Which of the following graphs yh8ll ( *xhvu-best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sp6k)fein y e,-. ziru;rhere has radius 3a contains a hollowed spherical region of radius 2a. A point char.u eyinzkf,r-6 e)ir;ge +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 figure by P?

  11.46: A hollow conducting sphere in static equilibrium iszxc35gv;ltt: )v2 ya c isolated in deep space with a net excess charge +Q on it. What):zc32 tv5;clavyt xg 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 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 co6fded 1 6zszmjde l845ntains a hollowed spherical region of radius 6dz jse1e65l fz4m8dda. 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 radiusv )h:q enzaotv2cn)/ r.0rv9u 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 equal?tqo )2nz/r rnv0 ev):c u.a9hv

  05.45: A spherical conduct l w4 txj4u3ezw1)jycdh.zptb )5d;w2ing 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 distance R from point A, and point C is a diz43.)lwd5xwty4 j e1pbu w2z;jcth d )stance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has chargtt4zsl qxudy8i 3 ,(y(e +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. qzyu(tyi 3t x(l 8s4,dPoint 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 rji rsy()4 q(qin free space. The outer shell has inner radius 2a and out (4(irjqs qry)er radius 3a. The inner 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 several statements presentedsa 5l2g*i;ux:d: qb;/qnnibl below that attempt to describe physical phenomena. Which one of t:xd li;;*q gq5a2n bl: s/unbihe following statements is correct?