05.20: A portable radio that is playing is placed inside a scrjdkti1hi d9 5:een cage as shown. When inside the cage the radio stops playi9 j5 i1:dtkhding because

  94.21: Which of the following statemeawd9sc (qq v9.nts about solid conductors in electrostatics are true?99dc.a( sqvwq
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 p dkvw kpdc8;sz/:4,r 3gdp:rR has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of the spherpdvcsr8, r k3 :zg;p4pddw k:/e?

  96.36: An isolated conducting sphere of radius R has positive charge c yn h((kg4b2df8ckef4 ccx/ s6b*u7g + Q. Which graph best depicts the electric field as a function of r, the dkgg2n(sxc6*u c/(h c7y4ce b4df8fbk istance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial u+0hc *u 7odztcharge + 6.0 nC and S2 of radius 0.040 m and tc7u odhzu+*0initial 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 diffln*t++ddrm; e erent 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 charges locatedf ck.ww)z5sm 8 at points 4 and 6 on the positive x axis. Which ws5). kzcm8wfof the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conyx:c;76l *suv*3ag pbbd nl5vducting sphere has radius 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 at the position r = 4a from the center of the spheres as d76bpn;vc g3 ba* l lxvu:*5ysmarked in the figure by P?

  11.46: A hollow conducti;um ekg060p tk td5x+)eu:kfdng sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What xut+up0e)fe 6t 0 gk;5:dk mkdis 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 sph yb dv:( rrduh5ms 5r1l98pe:nere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the y mb5 r(elr vds8hr9dn5::1pu 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 inner radius a and outer 2,tzjud *h *5rdu sxs;radius 2a. At the ce h*j ;2d,dzx*uu st5srnter 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 )jgl kj+h*1 8freyis 58vgr/xshell 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 fro8*kxs5 lvhj gyf )/r+i e1jg8rm point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and 0gx(60,kjo3x j7cm0wr)z uhtdor qqz2pa 8y )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 km rr8x)gu6a xoq72tjqzzd0 0()0wpo ,3cjy hC 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 cnq(7; ok0 cmnkharged conducting shells are in free space. The outer shell has inner radi m(n0 ;qn7kkcous 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 present1 gk0vtxt m(,31dpwzned below that attempt to describe physical phenomena. Which one of the follomz 1 vgdx3(t0nk1pwt,wing statements is correct?