05.20: A portable radio that is playing is placed inside a screen :onne49z,-): ( 7psm3laap a6q hdph th 7tjozcage as shown. When inside the cage the radio sth o96(pao4nn mq,3 tehaaz :slzptp jd7-:7h) ops playing because

  94.21: Which of the following statements about solid conducto;w 53z 0kchsg0y0nf k;qrl ,nprs in electrostatics are th5f; 0q;r3 y0,zlnk0pn wk sgcrue?
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 positi oc (n: :(+eoz vgpnu6ge8ao9bd tja-4ve charge + Q. Which graph best depicts the electric potentinvgdo: (+9z oon:gu(t8jae c p-b a64eal as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Q. W du:ot0a5wev38q 8gzi jo3 ows-ry+ 8which graph best depicts the electric field as a function of r, thue+ wsi38j-argvo0wo 83 twy8q5o:dze distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m r.1*v w1y daws5byi i1and initial charge + 6.0 ni1y1b *1r 5id w.wysvaC 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 until:

  17.46 Two copper spheres X and Y, with different cux6 j j wocy()k4(abk.; 2w bwvh6nr1radii ($R_x>R_y$) 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 chahq l,70jzo9z4op t5z asp5*j grges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential alongs, 4lgh55zjj7p9 qzozt0aop* the axis?

  03.50: A solid uncharged conducting sphere has radiusyzggq0: 3) n*rvtp s3g 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common ce*qtzsn 03gp) rv:gy3g nter 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:y9;-k/p8tnmlxq qyeir5; , io ij7xk in static equilibrium is isolated in deep space wmo y;k;iiq,i:xrnp je ytqk7 xl95-/8ith 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 radius 3a containsnvzky- .ylv)d0.p, ez a hollowed spherical region of radius a. A point charnyv .-0 z,e)dklpv zy.ge +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 spheru2i w1aoy2-ok05f rfsical conducting shell 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 exactly equak r51fowof u2s-i02y al?

  05.45: A spherical conducting shell has a net charge +Q placed on it. Which oj q+jx: ow:dio8 ,gr8xf the fol8w 8d:jxg,xo rq+j: iolowing 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 distance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor hask-kl9.aeon ) ecy/-0oumfdbg53(sg s charge +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner radius -9smog/3e nydkok(lefc bg5 u0as) -.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 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 m5-hf efk86ooare in free space. The outer shell has -mo8oke6hf 5 finner 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 statements presented below that att/u4v4/prit: exwywmp pv3 y(;empt to describe physical phenomena. Which one of the follouve/wi4m3 px wpp4(y ;yr/:tvwing statements is correct?