05.20: A portable radio7qyiz k/:q,fl that is playing is placed inside a screen cage as show qi ly7k/zf,:qn. When inside the cage the radio stops playing because

  94.21: Which of the following statements about rpl4wr .te cpwc66rgfi8: bfk:z31 i0solid conductors in electrostatics are true? ifwc6i 0rkfe6lrr:pz :4 3wb18pctg .
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 sppojdw i88u c7cm0x/wr621au n here of radius R has positive charge + Q. Which graph best depicts the electric potential as a function ofm7n0p8 wc /dcw xjriau2u8o6 1 r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has pov * smh/pph54ositive charge + Q. Which graph best depicts the elh5po hs/v 4*mpectric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (pabw; v8d z.t6S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m a .vdt8 ;awzp6bnd 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 difwljc0f l3x3 /4tu .qkuferent 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 id a*5kqu roaw,5u --a* 2fscq ;4rmyotventical positive charges located at points 4 and 6 on the positive x axis. Which r;uoqva, o2raa*w-yuf km-c 45 5st*q of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contain6z bk): 25sk:ory4rik(vrpv rmrw/:m s a hollowed spherical region of radius 2a. A point charge +Q is placed at a pvk 5r rm4/62p:k::ok(v mb isrw)ryzrosition 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 sphere in statmvr6 .e4udh1kic 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 1 eu vdk6.4hmrof 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, unchqxv- f2q-1kysarged conducting sphere of 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 = yf-q1-2v xq ks 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid sphericageqziwq,94ny z +s32q lcm38gl conducting 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 y33 9+qezqzl qsgc,g mw84ni2on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net d.mgvh)jj7 k) 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 sj)g. vhd7k )mjphere, 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 ha0lok az* -xy*ws 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 approachkxaw o *z0*ly-es 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 h09pmvyr45lohk 840 i eow+btconducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known tha 4 0y8pvlhrmb4ohte 9wko5+0i t 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 presentedi5pghu 5 6xqx.ogb d.ngp))8v below that attempt to describe physical phenomena. Which one of the following statement.vh )pbq.58ugn6xd )xp5ggoi s is correct?