05.20: A portable radio thate)pwtwqf-1ahg klv9p*pr; ds48 ;) wc is playing is placed inside a screen cage as shown. When inside the cage the radio ptwf*qdsp;4lw;a )v-rp )kg1cw98 eh stops playing because

  94.21: Which of the following statements about solid conductors in electrost b.b,o) oixn; s8s6svratics avs).ron8s; b, x boi6sre 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 radiuszwy.ko2xabh158 cwi dj 20)a1nht1nx R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of the sp)d2w c2bw1 i5hk n xhyn1axza8tj 0.1ohere?

  96.36: An isolated conducting sphere of radius R has positive chargek c5dv*c35 4xt ylsh5gc++brm + Q. Which graph best depicts the electric field as a function of r, the distance from the center of gbr4 5thy cmkc55* xdvcsl+3+the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0(/y7y)xe byzp .030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and inyzp /7e()xby yitial 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 diff5n u(yjbj0crcwy7 v31erent 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 i2sogsy vq)9a a *b2uy ;o.g9pkg*u0zedentical positive charges located at points 4 and 6 on the positive x axis. Which o9y g *s .*azyo0bqkov9pusg;gu22 e)af the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has raq1dtfi0i puy0cg5- k 3dius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed -pkq d01iyg0 c i5fu3tat 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 1ba+ 1gru: wagin static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (:w1gag u1br a+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 rrjr5.dnr c74-n wjenaqe8)(aij8gu4 x) nz3uadius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of a)jej)ujrn78.nxacr8q5urne d4 (g 3 i-4wz nthe 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 has inne9 a((u(o3/dpt r83wbwjq gqjmxw8sw/ r radius a and outer radius 2a. At the c8jtwmgwapx jq (w(q/ ou98/sr 3bw3(denter 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 conductyp;udcri xd7sh7b 0 :/ing 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 7d7rx;i0u b/hy:c dpsdistance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherilk41cxc-kz4i cal 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 obj4-1c4zkkicl x ects 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 condae)qk8n6tsseh v4io( 2t3 9hyucting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The innhn9a8 e4 issoh2qt )(ye 63kvter 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 attemptdi:e7oi b7xbneb miks (9 y/ekc3m(1* to describe physical phenibbmen ds(*i7 b 3/emoykkex(:9i7 c1omena. Which one of the following statements is correct?