05.20: A portable radio that is playing is placem.q+ 0ze;e csgar0 2osd inside a screen cage as shown. When inside the cage the ;o+rs0 0.2esaqmczeg radio stops playing because

  94.21: Which of the following statements about solid conductorb s93t8 onkueh*;rra vu)j zayx0l)*8s in electrostatics aa)vhxb k0y3 enlru8u; 8 *9jtaosrz)* re 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/j0f4iyei s d+ fir9;q has positive charge + Q. Which graph best depicts ;yi/ q+sff94j0e diirthe electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has po (ys*bmda 3dsru 3n5 mon6rq)9sitive charge + Q. Which graph best depicts the electric field as a function of r, the distance frob n) 36y nmmrsr3saq5od*u(d9m the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and in d4tgyjaj om-+u 3vw,8itial 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,v ado8+w t4 uj-3gymj wire until:

  17.46 Two copper spheres X and Y, with diffe 7 3mveg3e9qxhq k+,anrent 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 53sz4joi6a1c/zp v sqxj 5nf ,positive charges located at points 4 and 6 on the positive x axis. Which of thx3a scj5z5 j sn/6zo4,vf1ipqe following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conduct2p-gtravife 2-;og ixx q)g64ing sphere has radius 3a contains a hollowed spherical region of radius 2a. A point ;a io4 e62-piq2 rxg)gvfx-gt 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 conducting0z:t:qbtvmst31 d a3 s2 h 4nh/5aqzds sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assu s:qdz 42 /z5 d0tatma3b:qsvh1nhs3tming 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)eiromalbff /7 s2s-5n5/-a jxi0i da contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , -r255 /ef lboam) f7sja/nis0dx a-i i the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radjs s1nqmro 14p)a p3a)ius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the exces1jrqpaa)n4ss o3 m)1 ps 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,bbw4r8gg+ anb:x v*d 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 xndb4g :wb r 8ba,g+v*R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid sphericaw fs80 ( jy,efg2bugw+l conductor has 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 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 th,gjsf(2ew0w +8u gfb ye inner sphere.

  15.48: Two concentric charg)2lbb sp:e,f qed conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius abqsl2e):bpf ,. 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 atm;:*v1l p9o/i 2j x2sbvbylx hmy z9b/tempt to describe physical phenomena. Which one of the following statements is correc:hbv o/;zyb 2ji1m9v *y m sxx2l9pl/bt?