05.20: A portable radio that skcq:8udax8c j5k5 frdi 3rozc.e;3;is playing is placed inside a screen cage as shown. When inside the cage the radio stops playing bkdria: s cj;e58 3fodxcqr. zk3; uc85ecause

  94.21: Which of the following statements about sc)jv89 ccx*f wolid conductors in electrostaticsc9 wv*cxjfc )8 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 y2/d d;tahf7n + Q. Which graph best depicts the electric potential as a ft2/ ;anyhdd7function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Qz6h3lxr p3 x/ 0xtu wqy5/g5gk. Which graph best depicts the electric field as a function of r, the dista rght5/w/ xg33pqz lkx6u5y x0nce from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial cv evq6f+sbfz m5kw(n/:6+ng7dru no, harge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conductings(f6 +/ zvf uvknn +w: ndgqbre,o567m wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with dwyn v 8epg,w6t7tp.n 2ifferent 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 idenurw/ j,vrb ; s *bb8e,qf.0pfrtical positive charges located at points 4 and 6 on the positiv/srb *r, v8,0j r. pqewubff;be x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed2s)illgf6f/h/7fjyn-8ss b 7qt g:r2. dond n 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 ot6: -l.dr7lgs 8d ng2jo)/nq7 sis2/bfy nhf ff 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 sphere7-ovp5rsy.l: j hfxzcd5 y5 o1 in 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 interior of the 1fv j55c5zd-yhp:oy7loxr.sfigure? 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 contrxv,st - qy2*tains a hollowed spherical region of radius a. A point charge +Q is placed at the co*r t qyx2-,svtmmon 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 ix4fzd3mfk lh40 *4asradius 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? zxs f0kid43f4*h ml4a

  05.45: A spherical conducting shell has a net charge +q ;utn*w kt6s uwj4o;xc5fm-*Q placed on it. Which of the following is the correct relationship for the electric potentino ;stwj x wqmcu*uft5-64;k*al 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 infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surrounded + 1.itkx2u;v-z*m ocyrp u p5tby 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 sphereto5 *c+pmtr;yvkp .1uuxz-i 2s 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 space. Thext38etdf,hxnhs xk3k 7;4( qz outer shell has inner radius xt(htqh dkxz f;3 487 s3n,xek2a and outer 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 statz wp*so y o8mc3 e1id6(7n6zev14kpofements presented below that attempt to describe physi1 *p o71o3k4e (i dv66fonyzcps mw8zecal phenomena. Which one of the following statements is correct?