05.20: A portable radio that is playing is plbmk6c:6dsv8xy u1 u t6aced inside a screen cage as shown. When inside vux:6d6 1tmusk8 yc 6bthe cage the radio stops playing because

  94.21: Which of the following statements about solid conduct-qtbteix1c otcd q *,d++:/frors in electrostatics are trd+itec1*x /-ttb : ,qrf+doqcue?
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 okoq.gzmi5v /.w 5ff *h3x/azradius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance fwog /mf ko 55aivf/xz..q3* hzrom the center of the sphere?

  96.36: An isolated condulz+tj+4 6og .4gygltucting sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center ofglzuot l.j 6y+44g+g t the sphere?

  96.21: Two isolated conducting spheres (Ss1 5- oylhr;o7 kvmay51 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial chl5sr;y1a omo k- v5yh7arge + 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 d)yw2f*lgk :o vyx3wr2ifferent 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 at poix +avgt bp :7 ;)c9wwtesw.e+nnts 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along t7v: twte+ w9gnbwcx;ep)s+.ahe axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed j6*e3rhmee t+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 +j* em 6rhe3teposition r = 4a from the center of the spheres as marked in the figure by P?

  11.46: A hollow condm(nj xjup8d2g.kiy4,6 o- oieucting sphere in static equilibrium is isolated in deep space eip4ujg,kj.o6ynx2(mio d8 - 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 of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius 3a contains h8cxk2f-y 0 kc00dflhmv86i p7 xf k vi0s-(vsa hollowed spherical region of radius a. A point charge +Q is placed at the common cec kfsv68vfx0-i0lhcf hpk k -(0y0 dmsxv278inter 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 c*:y h:aa7k42r0aw 2f0bc-gkxr hs uooonducting shell has inner radius a and outer radius 2a. At txa0g :sw 7 y hoc2 4r0:-rhfuk*b2aoakhe 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 and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a n+0 glr:tz)xa-6 vqwonet 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? Poixz nq+o l-) :6vwtgr0ant 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 spherict6oq4j f 9uayt//+yg h y.ptb9al 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 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 ittt /y opq uab9 9/jf4h6+.ygyslocated 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 chargedl aajkb+6ilxqbd*nz )ugb:y -l25 -n6 conducting shells are in free space. The outer shell has inner radius 2a and oute-qj: k*diz2 bu6a n)glx-y6lb al5b+n r 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 phepay9 ohz. s,8ysical phenomena. Which one of the following statements is corrsheo 9 .,zyp8aect?