05.20: A portable radio that is playing is placedk3ev3h/)co z r inside a screen cage as shown. When inside the 3rzkh/ec )3 vo cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in electrostatimozq)j ld*2;jcs aj ;odmlj*2) qzre 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 spher0n+wzlsyk (ky k3 5;qve of radius R has positive charge + Q. Which graph best depicts the electric potential awnyklyv+0(s3q kzk5 ; s a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive chargeont)7a wuttk02wx/*p v j(r7l + Q. Which graph best depicts the electric field as a function of r, the distance from the t7rx/kw*l 02vwtuot)n ( ap7j center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial chax ,k,;m;i+4nk8lync0hj k czhrge + 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 wire until:y,kh,z;; i+ lkc 4khnxnj0m 8c

  17.46 Two copper spheres X and Y, witl7 jrgx/ ib+v9j1i *sah 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 cuf(vv,to.) cqxc +h 1gharges located at points 4 and 6 on the positive x axis. Which of thefv+g( h uxcc,)o.1v tq following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contaommmz ;73 d+isins a hollowed spherical region of radius 2a. A point charge +Q is placed at a pos7m3+domsm ;z iition 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 in static equilibrium -j haa,m*iur,p41 vbm12omaa7i 0ldm 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 from the center of the sphere at an angle al1o-a pdi 4am1a0 i7jurhv,m,* bmm2 of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of rv-7xrei4nn/ xvy+9*wr qy ;je adius 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 position r =2 a x9 ie4;yy /*wrxvrvn +en-j7q from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner 97zpw y ww xtzgfr1*m41k;2oiradius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess c1mrpw9wi17y x24tzo zkwf g *;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 a net charge +Q placedv4ee .,u3ylur up,;wh on it. Which of the following is the correct relationship for the electric potent u3weye,; ,uulph.4vr ial 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. I an:9rmat0zj.j p bti;-w,bk2t 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 spacej-at2b09tarnpwj ik:mz , .;b 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. ar.*)mg/pi/ k wko6pgThe outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric poten i* p/6wakg mr)o.gp/ktial 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 to descr- p :t- rp1nce5ks3tcfv0sq0v 6s2erkibe physical phenomena. Which one of the following statements is correctk 0s qesf:-pret 02vv3-k 6tc51cn psr?