05.20: A portable radio that is playing is r f.ct3 -,lpliplaced inside a screen cage as shown. When inside the cage the radfirllp c, .-3tio stops playing because

  94.21: Which of the followx , ;ppmj)xhvv )ho5ftp7 d7b*ing statements about solid conductors in electrostaticvj bt)ohhp);v7 fd5m7 *,x xpps are 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 condumvv3 8we n.inb:3-wnq2f 5nh jytf6*xcting sphere of radius R has positive charge + Q. Which graph best depicts the electri *nn 3en3fftqx6v2-:w wji8y nhvmb5.c potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Q. Wl93 ldo- bv,t-t5sypdhich graph best depicts the electric field as a function of r, the dilpsdo5t ,-lv 3ytb9d -stance from the center of the sphere?

  96.21: Two isolated conq2uynzdc v16 ;ducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial char 6ycvu2d1q;zn ge + 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 diff0wmdy+73tdviu a 0;zderent 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 located at8w5ooy+ilwv)wd bm 0 - points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potentiawm)w 8v lb0+d-i yow5ol along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed7n9msj78vkzo)s/p eu 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 u p)7/s o9vsmenkz87j of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static /ogd/w2ym t; m 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 ra;2to/m/mgd wy dius 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 radd2t :zmout) gt( /8ais (b:ammius 3a contains a hollowed spherical region o(t (z)d:/bam t2gmotsmia: u 8f 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 the center of the spheres is:

  04.50: A solid spherical conducting shell8y qgx/ cwq (zm+ f3n+wyyvy+8 has inner radius a and outer radius 2a. At the center of the shell is located a point char(m 8qwy /vqy+8f3nc+gw zyx+yge +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 chargeg 8:p i(i7a0)8udlrjzi :js mq +Q placed on it. Which of the following is the correct relationship for ti: z8l(r7dqaj8sp:m0 i )gi ujhe 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 from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor 3wv o( 4keq6aihas 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+ δandkoq i 3wv64(ea 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 -+pycy/zq xv 9are 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 /9zpy c xv+q-ypotential 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 preahv h.wb7*,(o,dz kqwf,+( 5o bq*tjn i5t hiysented below that attempt to describe physical phenomena. Which one of the followingv5 q,o,b( +7qt,nhwijw ah.ti*fzb*5(oh ydk statements is correct?