05.20: A portable radio that is playing is placed inside a screen ca,zu 5v qm.id2wge as show zv muiq25dw,.n. When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid ch+se 0 o;lmn ) u-owv;uc9 q+3mtwi)g*e at+uvonductors in electrostatics are trueasiev nm)w9g w*uuuq+)thv + 3;c o-+ oelt0m;?
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 sp l(g ba6 x9d7kaa1cc ia(x7)rphere of radius R has positive charge + Q. Which graph best depicts the electric potential asdcia7()arg6c( p9bx alka1x7 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. Whiicho8 7 .iztk)gs/cf x .z8s*jch graph best depicts the electric field as a function of r, thofit) 87*8. jzzgckcs/x h.i se distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial charg8hq)mkj1cryaq iq-lq y3+q ,4e + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by h+c-r1qq4 yqqy)l,8kai 3mqj a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, wit*h l7 in:)4c4kpu-ejpf 2kvdhh 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 positive charges located at points 4 ao-f.g ) 3 k2szpdkyg8ond 6 on the positive x axis. Which of the following graphs best represent the electrical potential alongo3fpdsk g8yog z-2. k) the axis?

  03.50: A solid uncharged conducting sphe d;k.69 1pv dkmy1fmfure has radius 3a contains a hollowed 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 centeru6 d yv1kdkf .p19fm;m of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolaac,. 2kff*f 7 eq5vd,uer gh/bted 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 edbg,f2r7ahvu ec*f q.k5 f/, 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 containsgx9h. (k zffqu/ixmkp0h +8r8 yiq 98w 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 → ∞ ,fykm90+9h .uh(qw i q88zf i/p8gkrxx the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell ha a fjrr02n fc6-dac6l.s 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 and outj.0r2rcdcf na 6la6-fer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it.hro wx b,r3-.m 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, pohrm-bx.r 3w, oint 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 has charge +Q a ss/z.. wjm7fmnd 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 isola/ w7 .mszjsf.mted 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 spa +tik;*ahmor4f xm+:pce. The outer shell has inner radius 2a and outer radius 3a. The inner she++xk: *t h rmopm4f;iall 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 sta09 b(na;i); a 6 ythlaxxjump.tements presented below that attempt to describe phys 6aj(hxu;;9ylia.0bax)mp tn ical phenomena. Which one of the following statements is correct?