05.20: A portable radio that is playing is placed inside a screb-nntgp u5f5 4en cage as shown. When inside the cage the radio stops playint5-bgn5f 4n upg because

  94.21: Which of the followingod m grsvze8p+t 28;a),uk jg2nq+j.j statements about solid conductors in electrostatics are2 g+.knjd 2vt)ajr ,pjsqu e+m88;oz g 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 conducting sphere of radius R has posit,x ci:c4q u,aj ht9z ryg*/ jt:8:lhfqive charge + Q. Which graph best depicts the electric potential as a functja:l:8 hz:hfu t*q, ccqt4i9r /g,xjyion of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has posf st:s j4g(*ositive charge + Q. Which graph best depicts the electrios:fg *sts4j(c field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (ryvip f-t*77veg/k3 jg5or ,oryb gb0n 4nr,0S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) arpgyf o-7b/ 3v0v,gn,r4 n rt7*o5giryjbek0 re connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with differeriv09y:n ga e0zms39vnt 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 chax/n8 8n yo)tt6k)elg nrges located at points 4 and 6 on the p)k /)n8x6tl gnoeyn8tositive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conductmbb l*t 9oxp)erb3x7;ing sphere 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 center of the spheres as marked in the f o*bexb x3p)b9m7 rt;ligure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolate qj+.:fphub8/ 4 jzpakd in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at the position labeled hap8 pkf bz4u+:q.j j/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, unchar( 4bzj am5jj4fged 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 spheresjbj5(jzf4 4m a. 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 shell has inner ra0isw l aqyu +x2w22 s)n)lh(ffdius a and outer radius 2a. At the center of the shell is locatfsxs)a yh2022(w+filunwl )qed 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 condvg 4rjqxrpy,.*u u*xs)j3oj6k6vdo , x0la7 kucting shell has a net 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 * *r0jq3 o , jojg7spx,4.)duvvkr6laxyux6kat 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 has charge +Q and radius R. It isquaiw g duc;*r(7/e3d 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+ δand Point C is located at r =2R − δwhere δ is an infinitesimal amount and all distances areq*7wrude3 cd(/g iu ;a from the center of the inner sphere.

  15.48: Two concentric charged conducting shells are in frees)r u;.f6rofo pi ea3ffji1c8ip ) d3/ space. The outer shell has inner d 1f i /p.j 6affrpc83efo3 u)isio)r;radius 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 ahbef; t+mcs-4+f ,,tf 7qiyumcca.,mttempt to describe physical phenomena. Which onecq+fc,, mty b;cs u-mh,e7fftmi.4a+ of the following statements is correct?