05.20: A portable radio that is playing is placed inside a screen .58p qrgegwtg vsv71)rwg+3 bcage as shown. When inside the cage +r8)1ps7twebg g5q g vg3wr. vthe radio stops playing because

  94.21: Which of the following statements about solid conductors in uzz2a aod 7f(an1of,4electrostatics are tr4(f2 7azuzoad,n1f aoue?
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 wr:syz2m :n7a of radius R has positive charge + Q. Which graph best depicts the electric pot2:asr:mnw z7 yential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of rd 6ij vic- d0/:vpp0voadius R has positive charge + Q. Which graph best depicts the electric field as jd cvvdovp006 -ii: p/a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of rad+(uw a kc;+9 pjgw8dbzius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial c(u ;pdbcwj+wa+k8 gz 9harge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y;)zv n z+jd-tc, 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 shows two identical posig9)ol8 0b +:8o1ut7ywykv( na nvtayetive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the ay0ut):an gbv+nty9y7 vwa(l1koo 88 e xis?

  03.50: A solid uncharged conducting sphere . ujy9 cct(t;ihas radius 3a contains a hollowed sph.t cjt(9 i;ycuerical 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 marked in the figure by P?

  11.46: A hollow conducting spheemiflw 0;2p:rre in static 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 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 o;r0i2w f pmel:f $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of2.5up s0ejm; mns5.uzor3vb h radius 3a 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 → ∞ , the potential at position r =2 a from .muzj vs5srn30mp5 ub he;o .2the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer radiuof9i zk7;n-tj6xtfrph*r- 9 fs 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shfrfz9 oj9 r ;h6p7t-n*itf-kx ell be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conductj6wjg8d78dq*-je e txl+eiz 6ing 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 frog6* 7d ljwi8jtzej6e+e8dq-x m point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius z:k4 lbm3v/gh l/vs.h R. It is surrounded by a solid spherical shell with charge − Q, inner radius bzl4 lv sh//mv:k3 gh.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 the inner sphere.

  15.48: Two concentric charged conducting shells are in free space. The:3epdyi8*,4 utfdde m outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric pot,*3eu:8t f myeiddp4dential 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 presentede(+. 7h+u(),mczihtlxa r ch d below that attempt to describe physical phenomena. Which one of the following statemen7ar,h (txh+mi ( )chd lu.cz+ets is correct?