05.20: A portable radio that is playing is placed inside a scjzlpma- u 2gc23j jy8ql/u. .treen cage as shown. Whe83m.pjc2 - ljujqazu t2.gl y/n inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors i6. 4u qfk, h)yzzb+ voeez96rhn electrostatics a.)6 eehuzqv koh,zb6r4+z9 yfre 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 y4)+8h f ens9trmy grr-c9-ln of radius R has positive charge + Q. Whicr n9y+eyfhsrr-)gcl 8n- 4 mt9h graph best depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of raditc)z:sf2 wget8 z7f*qus R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance fr e:7t2t)cqgsf8 fz*z wom the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial cha5+.q wbgk9sl 6ehisrgt 9rz5.rge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wir5w6q.b k5l9git hgr r9ss ez.+e. Charge will flow in the wire until:

  17.46 Two copper spheres X aofkv0ry4ngd v 1j8,9ond 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 positih-2cd :29ql jp,2biqij5adfrve charges located at points 4 and 6 on the positive x axifiqajr -qi,2p:d29jhld 5b2c s. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sp zbboki7:x;2hhere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a poohb 7 2i:zk;xbsition 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 conducti us /7-gsp3sfung sphere in static 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 inteu-sps s7f u/3grior 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 r;te.d++rkss:ko9ugm vg gv urm1 .+4qadius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the sphereeq+sm+gu.kr ;okm1surt4: .+ vdv g g9s. 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 radius abv h2 wx t3hy+i4;p.9+st1jbqe r,vwh and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess c yh bj23.ewi+rxq1,+thhwv ;tps94b v harge 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 7h bkjt6o5 *wpgzi+ tmo.jy72a 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? Poij7jt5 m.kb+oihp2t*w gz 6o7ynt 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 has charge +Q and rf)c74tq4sh re h hoen4neg(49adius 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 Point C is located at r =2R − δwhere δ is an infinitesimal amount and all distances are from the h4nco7efgr(4h 9)eq4nht se4center of the inner sphere.

  15.48: Two concentric charged conducting shells are in free sp(jp 9mvr pq is3r5y/6dace. The outer shell has inner radius 2a and outer radius 3a i 9y/(35dsmvprrp q6j. 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 t amp06d kg2r/fit/,ryhat attempt to describe physical phenomena. Which one of the following statements is corr/yirft2,rp k0d/g6a mect?