05.20: A portable radio that is playing i:ehsupcxvpp uik.72sg;e- v r5x;j h0j 85vf)s placed inside a screen cage as shown. When inside the cage the radio stops pl; f)j xjv8u e0sh7:52p; rp- x ceigvhukvs.5paying because

  94.21: Which of the following statements about solid conductors in electrostatcj5*sfi*q5l+so tqi - uiuu, ;ics are true5soqciu,i5*fi l-s qut;+j u *?
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 g)mo61w,m- mc0c8uf 4jg 8tizxd ah( wsphere of radius R has positive charge + Q. Which graph best depicts the elecmmo )gmf1i6c-awwg u0x(z dc4j8h, 8t tric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere ofr45vhyaa a4r 2sk-x4k radius R has positive charge + Q. Which graph best depicts the electrh 5v rk-rak2a 4sax4y4ic field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radiusij1m l :o1 ckf(lm3j) 2.urocd4qkoo-9b qd y6 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 flow in the wireq ci2 d kc)3l1:kd9y.o4jjb orflmu moq(6o1- until:

  17.46 Two copper spheres X and Y, with different rad0z)khr (tj0 hzii ($R_x>R_y$) 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 loc2k u:ycdq z,+iated at points 4 and 6 on the positive d:,2iu+ykcz qx axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting spgjft, 5.k:ls where 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 co5tlf., wj:k gsmmon 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 statiyv/ctb,4 pbob spd q;7gb9f08c 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? Thegqtpvd8s /b7 b;4op9bfy b c0, 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 s xkw)qz(r0ztj4 jz j).phere of 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 zjz.t)k ) zr(jqj4x0 was 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 a ani+/ (rrosxw8p9usgxv o7;5z zd outer radius 2a. At the center of the shell is located a poin+8 7gsr(wvpsx;zo 5i9zo ru/x t 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 z44harzx s*-g +Q placed on it. Which of the following is the correct relationship for the-z xh sr4za4g* 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. As r goes to infinity, V = 0.

  07.42: A solid spherical conduc -zuvg jqghlk/hp1;,0 tor 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 obju p j 0,/1kzg-ghvh;lqects 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 center of the inner sphere.

  15.48: Two concentric chargedz)c)a d8w jywz9(skf( conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell hasjcf89a()dws w)k yzz( 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 statemen t3hjypgk4z14ts presented below that attempt to describe physical phenomena. Wh4gjyhk3p z4 1tich one of the following statements is correct?