05.20: A portable radio that is playing is placej 4kors5p i4ham9gi1mp6 s;i1d inside a screen cage as shown. When inside the cage the radio stops p1ij9 ;o4 r6ih5ask4sm gp1ipmlaying because

  94.21: Which of the following svi8-hkj3g iv:s k am)2tatements about solid conductors in electrostatics areaig28j k v3i )hs-vm:k 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 of radius R has positive charge + Q. 10ld4qdlisb(r8s u a : Which graph best depicts the electric potential as a function l4i qu:ssd 8l01(rdbaof r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive cha, n dcevuyr 2m5la9,d3k+v pr(rge + Q. Which graph best depicts the electric field as a function of r, the 9venm,a(rr2cvdl5,p dky 3u +distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial l7ojmc t+;nu0charge + 6.0 nCj;0u 7lmonc t+ 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, withh ,s7s /k4 rgr6 36uevx8ubpwg 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 positive charges locatedi2uzo.;d.s ru at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potentisir.odz u;.2u al along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed sph 7w 8e;zjhnf;)demy (derical region on z mef;hde j)78yw(;df 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 condklg, /xd56rib ucting sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the e/l5bdk 6xgi, rlectric 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 i/c2jhxy+-u x 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 as r → ∞ , the potential at x/-xj2 u c+iyhposition r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a andtvk- pswa2xg,k w090d outer radius 2a. At the center oftw0s9xpw vkad 0-2k, g the shell is 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 g83f2qvlsqd /i3 hfb*a 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? Point A is at the center of the sphere, point B is at the surface of the shell, a distance8bdl3* / fs23fiq vhqg 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 chargl.zld4o djip u b q*jt(8ba601*ew2yo e +Q and radius R. It is surrounded by a solid spherical shell w1pq64l2tj8zd b ( a oweod.bi0jyu*l*ith 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 center of the inner sphere.

  15.48: Two concentric charged conducting shells are in free space. The outer x59 ific f5rtk- htt1)shell has inner radius 2a and outer radius 3a. Theft ik5 5xr1tf9-ihtc) 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 that attempt d9lko ,tp2xz8to describe physical phenomena. Which one of the following statemxlptz,9d 8o k2ents is correct?