05.20: A portable radio that is uy)l*y yh hg,7playing is placed inside a screen cage as shown. When inside the cage the radio stops h7 yyuh),* yglplaying because

  94.21: Which of the following statements about solid conductors iu .bmpie 6t9,yn electrostatics are tru6yp9bte, i m.ue?
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.utpl axzxh4.68x pb+9 Which graph best depicts the electric potential as a function of r, pxhp l9x z6 t48au+bx.the distance from the center of the sphere?

  96.36: An isolated conducting sphad;1+q 4cf ip*u z/rrsere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of ziqa +4 r;rcpuf*1ds/the sphere?

  96.21: Two isolated conducting spheresi(4 az+q jjd(l (S1 of radius 0.030 m and initial charge + 6.0 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 wi4(il(qdaj+z jre until:

  17.46 Two copper spheres X and Y, with different radii )klzec,l.0fq)uoja8+yq:w n:e2f xs ($R_x>R_y$) 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 chargy0xhgg7 p431lz vdse 0es located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical 43 0zy 7l10edsvgxhpg potential along the axis?

  03.50: A solid unchargm *l cp8eq:q:ced conducting sphere has radius 3a contains a hollowed spherical rl::m 8p qe*ccqegion 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 figure by P?

  11.46: A hollow conducting w7fgj /f iyostlle08, g*wo)-sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potfwt0 o,jelwy7 sl*o)/-gf8 giential (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 contains a holl pji9dhe7t22ha)g6x t owed spherical region of radius a. A point charge +Q is placed at the commone29h i62gt)p ta h7djx 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 shell9zdj,i(x p*ryv i /8qj 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 derix j98*j/i zp(q, dvynsity on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it., 0qh.thmnsp(h: r 0c op0,lwy 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 ,s0hqpy h,.cor0h(: lm 0npwtA, 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 surruv. ib*f t2b6t-c,jrcounded 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 and2.uifv brcjc -,t* 6tb 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 in free sjj5ub .:ranl;pace. The outer shell has inner radius 2a and outer radius 3a. The iran;blu5 .jj: nner 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 presented oknk(3f;ud g3p 9scv7below that attempt to describe physical phenomena. Which one of the following statvkg;dc( 3 of97p3nkusements is correct?