05.20: A portable radio that is playing is placed inside a screen cagbb.ecg )83id:sy f8jle as shown. When)by 8sj83 ifgdb.cl e: inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors bgec 0y ..4pwein electrostatics arew4cbg0.e.y p e 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 spc cq8ura32,f om flm-,here of radius R has positive charge + Q. Which graph bestl aocf8-r3 mqf,cu m,2 depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has pt9 e6zrt/ vd6ix26biwositive charge + Q. Which grapti2/9xe6i6w6t z rdbv h best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated +xi nj h:fod 8a8:bbv8conducting spheres (S1 of radius 0.030 m and initial charge + 6vj8: obfxi8+: 8a nhdb.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 wire until:

  17.46 Two copper spheres X and Y, with di e2o (5img;qbhfferent 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 lo7)4dt,yqt:t7 v fuibncated at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical pot but7t)7fi :qny,4v tdential along the axis?

  03.50: A solid unchargx gkf;e:f0hj*ed conducting sphere 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 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 mj:f;e*f 0kghxarked in the figure by P?

  11.46: A hollow conduct-ihl3s l dy*x4ing sphere in static equilibrium is isolated in deep space withs*3illyh xd4- 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 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 radius 3 8s m j;zank1vcr/-*lsa contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V *smvkr/z8sn1-;caj l = 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 a and outer radius 2va/y*2n nf* fba. At the center of the shell is locf2**vf/yn ab nated 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 n:3nnm9ggpep akti5 18et charge +Q placed on it. Which of the following is the correct relationship fiag g :9518ektnm p3npor 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. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surrounded d w6v0 70s12klorp efrby 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 i02def r sv60ko p1wrl7n 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 center of the inner sphere.

  15.48: Two concentric charged ct10j +7 dxymkdcx )z7donducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The in c17+ zdjmddxtk07x y)ner 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 thci7) yha 4n.jeat attempt to describe physical phenomena. Which one of the follow7 e)incy .h4jaing statements is correct?