05.20: A portable radio that is playing is placed inside a screen cage y0j5lw09u: wxrg-vqyas shown. When 5wywjl0 r9y q0u-:vg xinside the cage the radio stops playing because

  94.21: Which of the followi nvzowyjqsq )j0.d.63ng statements about solid conductors in electrostatics are).d j. o0 jnyqzq3vws6 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 )s 23ss sxo9(hcu 2tcq.3jukj radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center9j3sc.32(tshkxc js)2o qus u of the sphere?

  96.36: An isolated conducting sphere of radius R has(opj n 74 6pvpv2vn2ebs0n7,,hbaxnz positive charge + Q. Which graph best d(pj7h,pnvsa nxn4vb2,bn e pzo67v 20epicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting si 3b(e7x+fee emea 5u s,keb/-pheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will5xembes/ie,f kueab-e+7(e3 flow in the wire until:

  17.46 Two copper spheres X and Y, with d ee57n2wo 0pphyfgu..cm)i g 7ifferent 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 hf8vwt;k ggdy i vn4,0f23* vwpoints 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potegf28wd;gw v 03 khf,*t4invvy ntial along the axis?

  03.50: A solid uncharged condu(wo.3:yosh lscting 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 figo.s( :s3lhy owure by P?

  11.46: A hollow conducting sphere in sy*yi5sqlh pi 6q)*lx;tatic 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 i*6) xp ;qi5hylq lys*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 a hollowe4 n98rgu0u.zrt9jo zpa25gftq7dih5 d spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Ta 90u7dg ahi5rq rnpf.ztt 98gz24j5ou king 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 radiuszgxc 7 8.yql .ualgg9.qtd9 yh6*7 gls a and outer radius 2a. At the center of the shell is loc*qzq 9hls g y. .xa. u8t7cd697lglgygated 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 shelp3.sz0ti+dq9 0 m(r azhi+nmx. obz: el has a net charge +Q placed on it. Which of the0dx. t.r bn: ehi(+p+ za0moqi3z9zm s 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 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 hask*.e;)hds p dc4t f k*app:zm,9ddj /s 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 islocated atr =3R+ δand,.dkd*fmp*p; 4s) tdp9szchd k:a e/j 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 charged6.tscqtw6ct e) 92r3q4m1jfqj+mlbe*f of m9 conducting shells are in free space. The outer shell f6e) ttqqof f 3sjlm 2 t6m 9rb.9ccm1*+wq4ejhas inner 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 attempt to describe phy ps(wl:i5cfj 7 q(6yuhsical phenomena. Which one of the followh5p( y(f cwju7lsiq: 6ing statements is correct?