05.20: A portable radio that is playing is placed inside a sc .. ,rj-hfz )jiai3g dnzl:z)mb*3kwbreen cage as shown. W:a lz, wj gbfd3rz h-z)ij.)*.nib mk3hen inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in elecm5 p)v9 cp.lbu+2cmjd ygqk .7trostatics are trpj7ml ky)v2g q.u dbp c9+c5m.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, ;yyzsld5 ;g t4uc8ir positive charge + Q. Which graph best depicts the electric potential as a function o,5y4;s rdic 8g;yztulf r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of rzdvazb dx4j yxu4a, m)7owzi:(889im od+zt9adius R has positive charge + Q. Which gmu, 9wz 4az+z97jid4 vm()axy8 bi:xtdd8 oozraph best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1yg8 36hywg*, m( fybob 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 flomg 38b(wyb 6g ,yo*hyfw in the wire until:

  17.46 Two copper spheres X and Y, with diffl ew: ::tw,33scd: 0jphbq7lzdy k2ejerent 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 positive charge5cu ,d,grmj u.s located at points 4 and 6 on the positive x axis. Which of the following gra,rgm. judc 5,uphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radin.9t )ftl- wsqus 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 . ttlnq-sw9)f 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 static equipq 1amg)cs 64wvl6i(vlibrium 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 poin6 g4wvilmpa 6c 1qvs()t 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 holloweiew ak 7:+4ajrd spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 07wji aekr4a :+ as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer radzuo.2n - 1mnaaius 2a. At the center -oan2.munz1a 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 on in:gb1 q 4w vke(p27haat. Which of the following is the correct relationship for the electric potential at the points labeled A, B, and C? Point A is at thqp n2v1ahe k(wga47:b e 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 charge +Q and radius R. It is surr 7 py-7npevr)tounded 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 inner sphere, Point )7y7prv etn-p 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 shell uphpbc+2dre6z yn8 vug:2 :9ms are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric pb2h ycv86:u:2 d9m+ rzu egnppotential 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 belg0(-nlmp,p d bow that attempt to describe physical phenomena. Which one of the following statements is correct?pn( bm,ld 0g-p