05.20: A portable radio that is playing is placed inside a screen c r+sllu)mq98v2 k2eehage as shown. When inside the cage the radio stops playing e98)2q+krml2 hl uv esbecause

  94.21: Which of the following statements about solid conductors in udi3l;:y( cgse68cke electrostatics are t3 :de(i ckg8l; ce6suyrue?
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 o s2pg)k 8d2y++l4vmt ysd+y,ylrg2 tt kwpk ..f radius R has positive charge + Q. Which graph best depicts the electric potential as a function o4 +dsk +)t sglk.8dymg tvt k2yr lywp+.22yp,f r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has posit8l2appk/hkq1. t was)ive charge + Q. Which graph best depicts the electric field as a function oq8wlpa1/.hpk k a) 2stf r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radiu7je: ehol 2ry2s 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are coee ro27ylh2: jnnected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spha;lka9b 48q f-oa1hjperes X and Y, with different 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 sh 3ue: qbxlo)crt/4dm4ows two identical positive charges located at points 4 and 6 on the pb3:tcm/4 dxrql) eo 4uositive 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 hollowed sph/mcacb;c ,k13i )ggw8sg9r.xrkv5 wnerical region of radius 2a. A point /53k;kbwr8iv . cgcg9gasx)wmn1c,r 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 sphere in z wx qd5-:.k q(tmff.bstatic 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 b.k(xw.m-qtd f5q fz: 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 rakn5 572 zru7zak fbhrta4po3 /dius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center au 4f 73n27kzk o/ar5tbzrhp5of 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 has6m8*-aw7qz m k kmp3coo73 wfk 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 o mm 6m7wk*3pf-wkoc37qzka8 be exactly equal?

  05.45: A spherical conr2m+5zb g7cty;g1em aducting shell has a net charge +Q placed on it. 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 A, and point C is a distance R from b1+zra7g5ctmg;2e y mpoint B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has l exrwl+6t7*t charge +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 ine67tr wlxt+l *finity. 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 shellu-u p)ne9tb*ys9d3q lz 7dl m(s are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known t) dnq d7t3bu* puyl- m(l99eszhat 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 b t4h5/h bg; zf08xboltelow that attempt to describe physical phenomena. Which8xt b 0/f b;to4zlhgh5 one of the following statements is correct?