05.20: A portable radio that is playing is placed inside a scre*px5ple m., g;jl bb+pen cage as shown. When inside thj+gllb.p*;,p be5px m e cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in e ,e;pklq raja bnql1/,g8k((blectrostatics are true?a1l;/qr( bbkep jlgk(, qan,8
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 has posit mcw-*fi:h tn.aia;c 5ive charge + Q. Which graph best depicts the electric potential as a function of r, the . ia: f-*mnt5cc;awhidistance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive c-nc f,n7+.hfqcfp.mi harge + Q. Which graph best depictnf.. 7iq,mfpf-+ncc hs the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radi8q y0hahzq,n+ auqk4c ln5**kus 0.030 m and initial charge + 6.0 nC a *q4h0 u a,hcl*nk5a+nq yqkz8nd S2 of radius 0.040 m and initial 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 different radii (h+kjp id7cpg2h88 cd)$R_x>R_y$) 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 at points 4 anxy - 61mu569ugjew,yh g gz*vyd 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the ax1 6, gx-6y*ugju h y59vmywzgeis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed s9t,nk u 0g(-p:dgmqm,h, xj kupherical region of rahtqgm( ukgupd 9 -m,,0x,jk n:dius 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 conductixv, xm+ ueteq0u+h4 t6ng sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. Whatu+utteme,hx4x qv 0+6 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 of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius bmc dfu- 5-cr23a contains a hollowed spherical region of radius a. A point charge +Q is placec -5r-cdbum f2d 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 conductin0 d ig((yio94an yel f-,b)djtg shell has inner radius a and outer radius 2a. At the center 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 andbf - jd4e tyo dina(l(g,)0i9y outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net n ().t/o g(bwow-clkocharge +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 distancg.-o/l( kotcwo nb w()e 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 has chazn1qhodis fs gw d vv+27c *)j, 62v610pukmqnrge +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 isolanqij 2*0 7mdck+d1f h6,v) g6owvsuq1v pnsz2ted 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 outexsr( dy.2d6mhr shell has inner radixr hy .(62mdsdus 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 presented below that attempt to describe ph -wnw8z+luso ) quid9:ysical phenomena. Which one of the followiulzs q-)+8uwdionw9:ng statements is correct?