05.20: A portable radio that is playing is placed inside a scren-pa2e lo 3hk ruhp;x5, wepjy4e3e4+en cage as shown. When inside the cage the radio stopshlyeh njkxupp+ ;rw e4253oa-e3ep4 , playing because

  94.21: Which of the following statements abour1c xsnm*b ns/0sti-1t solid conductors in electrostatics are tcsrx*n- 1isnm bt10 s/rue?
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 radius3x:mar )hyu-x8ux 1kg kcf. hr*a n)m2 R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of the spxay k 18axx:runc3m)* mk hr2).ughf-here?

  96.36: An isolated conducting sphere of radius R 0,j/xiqgw6edb * ewg- has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of the sph gqgee 6wd-wb0,/ix* jere?

  96.21: Two isolated c31 mjgxorq ()w7*xdr6pq eok3 onducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 jx)g* w73r6r1ep o(qd3k xqom 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 and Y, with different nchu q,b + 1jkq(u327)rwuxsb mvmb48radii ($R_x>R_y$) 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 4 anc nsuf riy1me*2k-4thsb+g8 g0,vh-p d 6 on the positive x axis. Which of the following graphs best represent t1 *uhpc8ehm sgksnbg r+tif, 4vy0--2he electrical potential along the axis?

  03.50: A solid uncharged conducting sphere3 pjt1r3p+g4zi7qg r o 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 = io p rqjg1pgz47rt3+34a from the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibriumbg vnf rba6 9:kxby8n5+2h.rc is isolated in deep spacnk:bcyarx.5v6+r98fhnb b 2ge 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 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 radt0zy02/ ng .kcgpz ar4ius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the0gnykg.ptz /r2c a04 z 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 shellb tg0p/bf qx,1 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 outer surfaces of the shell to be,q1gp bxtf b0/ exactly equal?

  05.45: A spherical conducti 29)ammv;ow5ic eabh0ng shell has a net charge +Q placed on it. Which of the following is the correct relationship for tcveh bim m90oa5;2a)whe 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 infinity, V = 0.

  07.42: A solid spherical conductor has charged 5+w u0zk,npc +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. Point A is at the center of the inner50+ cnzdpkwu, 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 a9m+ s-xixea5in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell haei-s+xmax9 a 5s 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 prevl(c8y o*(v m** winvzb+xz7hsented below that attempt to describe physical pw ( +*v *(nv7vbolimyzzchx*8henomena. Which one of the following statements is correct?