05.20: A portable radio that is playing is pl-9j umdffsp,s ,s vne:u7 t)+gaced inside a screen cage as shown. When inside the v,u7ef+ mun,gd- 9s:s) tjpf scage the radio stops playing because

  94.21: Which of the following statements about solid conductors a(nfy5: 2ajhbp (s 9vwa c:wd)in electrostatics are :5 fcaw)y2v9ajh ((sd:pbnw a 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 char)u yq0 (yfx*na3-h*y kl,j akfge + Q. Which graph best depicts the electric potential as a fukjy x)-y**( qunk0fa3h lyaf,nction of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of rwuj3nmu dwe 3:a ,6/euadius R has positive charge + Q. Which graph best depicts the electric field as a funct,/ujw e3 w de6am:nu3uion of r, the distance from the center of the sphere?

  96.21: Two isolated x)w i332r) nn, xhpuoih9pyyd.mrp9+conducting spheres (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 wire u)+d , inn2u9y ixw.ph x39yrhp r3pmo)ntil:

  17.46 Two copper spheres X and Y, with differ-5fk3(hena k vent 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 po z,-;hev l.lzpsitive charges located at points 4 and 6 on the positive x axis. Which of the following graphs be,; z.evhz-lpl st represent the electrical potential along the axis?

  03.50: A solid uncharged conducting spheretqhux ik.bbue/3oy :;24.4b tsd5 yui 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 = 4a from the cebth;sbu:.e .4 q5xtyu234by/dko i uinter of the spheres as marked in the figure by P?

  11.46: A hollow conductingm6d/dr932 4zsopn-;,wok t(yuzqj yx sphere 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 figure? The sphere has radius R=3a and the point of interest is at a location dsmo(-2; p,r nkty9o d6/yxjw uq3z4 zr=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 radiuwe1dbedlk 43, s 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the dek1 b3d4ew,l 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 i .9 e1anji alj)d/bw5zmz 9:uconducting shell has inner radius a and outer radius 2a. A)a.jb19:z a mun/ li9zj5wiedt 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?

  05.45: A spherical conducting shell has a net charge +Q placed 3fk/v:,rl tk5msvvdvhe .,c(on it. Which of the following is the correct relationship for the electric potential at the points ,re,vtkk5cv3s:(vh vfm l. /dlabeled 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 chargsl - mghd1vv p9lph:w73.6tyi 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 electri t3hl v9ph 6smg:w.p1v-7ydilc 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 space. The oute 9mnzcl w1t34zr shell has i4cl1tw3z m9 znnner radius 2a 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 stak8x zva+epr89ltf9 s2tements presented below that attempt to describe phy92esa r9ftkl + z88pxvsical phenomena. Which one of the following statements is correct?