05.20: A portable radio that is playing is placed inside a screen cage ,v6kp:v8 eo db as shown. When inside the cage the radio stops playing bk:d 6e,v8ov pbecause

  94.21: Which of the following statements about solid conductors xu l2tt0 wq+ sc9+iy4qin electrostatics are tr+iq4us29y+ tl0w qxtcue?
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 + Q. )ghky6v;uhn , Which graph best depictsky6)u;g n, hvh the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated co0 7a )xt kjc bl5g0karc0i+sf8nducting sphere of radius R has positive charge + Q. Which grapk)j0cl 0xgfs57aictk 80arb+ h best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radx,,yglquqh6 0(k yshl: ,y uo6ius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are cq ,s:ylyxogkqy 6u0 ,u,lhh(6 onnected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X e*s.)n qq jxu*:ymio- and Y, with 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 c *11nbvs8imdj k +qh..a 6zhruharges located at points 4 and 6 on the positive x axis. Which kr6 i1 haqj.hnusv.18 dzb*+mof the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a co: hs; qtud-j*gntains 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 a:;-st*gjuhdq s marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is ce:c szgazkw 09 f719oisolated 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 at a locazo0a:ck9g19 7 es czwftion 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 og9 1ytv:s q*ytf 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 = 0 as r → ∞ , the potstg9yqtyv*: 1ential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer rptbc9nkp8lr./ ix 9z) adius 2a. At the9 tr8in p.kxlpc)z9/b 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 outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q plac6gys(ey focwld5 f3;* ed 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 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. l6w3y;fd5y e foc(gs*As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surroundedeo36:yflr ly 1k,5ngqz0jhe - 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 are from the cente z5ke-ye nlr0h,q1yj:olf 3g6r of the inner sphere.

  15.48: Two concentric charged conductinmr+ogk: y9m ) 9awzq-ng 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 t+ mzmaonrw 9q9)-gy :khat 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 biej c18at e3ip3xkz/:elow that attempt to describe physical phenomena. Which one of the following statemetpc38x i/:jike3ze1ants is correct?