05.20: A portable radio that is playing is placed inside a x0s(xmptd kdkab0 e7;49bh;5cq n ;qfscreen cage as shown. Whek x09h;fam;7sedxpcb bqt qn(4 kd;50n inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors igvy 1f+ wl,b.kn electrostatics+vg kf,w yl.1b 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 condu1( kbx 4ttupeg8i)fcv-tj3y9cting sphere of radius R has positive charge + Q. Which graph best depicts tbv4ktcxu 89 e3jti( gf t)p1y-he electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated cie3v3jf jb7 v b8r+a4gonducting sphere of radius R has positive charge + Q. Which grapej ja3f 84vb7iv+r g3bh 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 radius 0.030 m and initial cha p(2xgg37sbc 5m1jkznrge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Cpg 3x5n1kzmg 2sb(c7jharge will flow in the wire until:

  17.46 Two copper sphere gabv tbw2mfs-/*3(4zydte i;s X 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 is:qbgx+z5 w0-vt,dktwo identical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represedv:0w,gq -z ikt+ b5sxnt the electrical potential along the axis?

  03.50: A solid uncharged conducy-jr(t(d f9ijf xeo, ge*v* y2ting sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a pov92d(eyext i -fjgj fr,*yo*(sition 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 figure by P?

  11.46: A hollow conducting sphere in static equilibrium8 kw.rqqm/ a -e+q 7vai1ef4je 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 interior of the figure? The sphere has radiuw m-qq vkj/q.e7ae +8arie 14fs 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 condus:kgfbu:u7 3 hcting sphere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at theu f:kb:sh 7gu3 common center of the spheres. 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 inneqp9 -s9:f(e j(mtlxzir radius a and outer radius 2a. At the center of the shell is-x pjs z(i9 (l:etqf9m 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 placed on l,ahe; iamivl qwf;m s(-tz5/vpz ;; 4it. 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,zvlv -f ;l,ws;pa qm5 /;;aztiei mh4( 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 radi7 x06rmwa*0bf7w9 s shtk(pvbus 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 t*fp00tb6 sbvs7kam hxw9w (7rhe 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 conx t35 sg/e3es9rbl2 phducting shells are in free space. The outer shell has inner rad e t3/p5 2lb9shegsrx3ius 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 severb .4a -xpsgf0cal statements presented below that attempt to describe physical phenomena. Whichfcgp ba.4xs 0- one of the following statements is correct?