05.20: A portable radio that is playinqujo c1;0o q;sg is placed inside a screen cage as shown. When inside the cage the radio stops playi0qco sq;u1j;ong because

  94.21: Which of the following sj.66/6zwok )8r9hukkdl f b eutatements about solid conductors in electrostatics are true? lu9wj6u68z)6k fb or/hkkd.e
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 ra .uxmqr2ef ,v0dius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance fr.ruqvf2mxe, 0 om the center of the sphere?

  96.36: An isolated cond rxhyb0f a+1awfs9561 wchni8ucting sphere of radius R has positive charge + Q. Which graph best depicthx h6waf 5n0b9f yrw+s8i1a1c s 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 0.09yg(pp;2e zr.jz l qm130 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are clem rpz; jgp2y91.z(qonnected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with diffeot0skb2x 1z89k lwet 7rent 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 points 4 fhgvv )kmc8i5 b3oqb0f-v2s0and 6 on the positive x axis. Which of the following graphs best represenqvhvof b08b)kf i02v35gm c-s t the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed spv qv92pw: jif3herical regij :iqvf3wp v29on 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 figure by P?

  11.46: A hollow conducting sphere inhsgrv 3s* :(ttn9dlw 1 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 interior of the figure? The sphere has radius R=3a and the point of interest is at a location r=2a ( :nrh9tsvd gs*w1l3tfrom the center of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conduwhay7 :n.a .gku8j4sf cting sphere of radius 3a contains a hollowed spherical region of radius a. A point charge +ufw:.7h8 jaynsk.4 a gQ 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 spheres is:

  04.50: A solid spherical conducting shell; rii4h2qe 8kn has inner radius a and outer radius 2a. At the center of the shell ii2kq;hir8 ne 4s 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 charhr.d+ d(z b.yoge +Q placed on it. Which of the following is the correct relationship for the electric potential at th (odyzbd.h+.re 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 ccwlhy xbv)4c4 j80md:onductor has 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 zeroj0: 8y4d hxb)vwl4ccm 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 center of the inner sphere.

  15.48: Two concentric charged conducting shells are in free space. Thel4ys bby4 hb)* outer shell has inner radius 2a and outer radius 3a. The inner shell hab 4 4lbby)*yshs 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 atthsae+ )2q1qfnzmr6vl0stulmo87m2 * empt to describe physical phenomena. Which one of the following sta)m*t r8l zm1sn+haf uq0q2v 7loes6m2tements is correct?