05.20: A portable radio that is pl m; z*/w(tr- 3btwr-a(rli nsx+mwt*laying is placed inside a screen cage as shown. When inside the ca*ra-;/xs(itr-rbwm( t* tw3 lmz+nlwge the radio stops playing because

  94.21: Which of the following statements about soligoq tbo:16i-sx, 2ei ad conductors in electrostaticb,:6tsqx-1ao o 2ieig s are 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 positive charge 5x0gbu .k. v*hx 5gedq x6mm7c+ Q. Which graph best depicts the electric potential as a bx e .5cx5gh*q .g 7xuv60mdmkfunction of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has p58;r tug.imgt ositive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the cente .rtgugt5 m8;ir of the sphere?

  96.21: Two isolated conducting spheres ( r.d;vn7e(rngfm 6un09dyfg/p 61po nS1 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 will 1ov;epnn67 nfy(m/gdu.rgn 96r fd p0flow in the wire until:

  17.46 Two copper spheres X and Y, wihozp : +jovc55th 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 atydpqbltb2h y1:g6 4n9 points 4 and 6 on the positive x axis. Which of the following graphs best represent the ele4h t dn:b2gy1p 69lbyqctrical potential along the axis?

  03.50: A solid uncharged conduc-p,kxd,a 9fvxting 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 magnxvx, p-k, fad9itude 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 il7c538l xw dl in static equilibrium is isolated in deep swx 3d8clil7 5lpace 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 a holloweqlj-6y9dfqnd lk :)dn s6;u8 md spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , the potential at position r =2 a from the center of the sphyd 8dl)6q6f;sl: m-q n9jk duneres is:

  04.50: A solid spherical d. fo;my).ro vt o 3psogv21p4n,rn3s 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 or.vrnooftposg 2d3)smro3 1pn. ,v;4yder 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 net charge +Q placed on it. Wmyjq5rs91n2 hc1x z4hhich 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 scx r 2ymhh 5nj1zsq419phere, 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 is schltx8s5o- j p 5ge *4y(x- qt)s8cdlgurrounded 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, Pol48s(tg ec8 hxo)spd -* clq5t5 gx-jyint 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 frg36wkfma*m vamk19 n 1ee space. The outer shell 1mkgnmvka wf3* 619 mahas 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 attemptdr 2:;z acmz a,fmj4z9 to describe physical phenomena. Whichz4z2 :zmmj, acf 9dr;a one of the following statements is correct?