05.20: A portable rad; 1wi 3n,1 5lvpzdmukaio that is playing is placed inside a screen cage as shown. When inside the cage the r5 vpua;1 l3d,nmi zk1wadio stops playing because

  94.21: Which of the folw3)btf b-ny*14gy mfrf7, y1eqpepz4lowing statements about solid conductors in electrostatics are tr7m-fy1 ep4b) eqb 3f* t,w1f4gpy nzryue?
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 conductcnb)v5jh /3nz ing sphere of radius R has positive charge + Q. Which graph be) z/jcn 5hbv3nst 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 positive cwz(sgm l0* wh/xr :w/uhr 1,etharge + Q. Which graph best depicts the electric ferzs trh/wgmx*l:u,0h/w w1 (ield as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting sphhgbacg31c+sjjn 2y2 : eres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of2hnb1 sgajg :2 cc3yj+ 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 an83,jlt(iyhesj e: wt+d Y, with 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 iden1n3b 2x fe huwm3a5v0gtical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent tnuve0 3 gbmf31x2haw5he electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contam odkms88+ gq81c otyofw,o60w3mmo +ins 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 c qt8 8os ,wco6ko318fm++ymgd mom ow0enter of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolajtm t7)v 3 j34gxu(ayated 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 th 7v3uajy 4t)amgt j3x(e 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 3j-m/k--e uzfk a 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 potent uez--fmkk/j -ial at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell hasl4 9urylgkt,5)m)/ijc;g ph6 ya9w bv j+ g-bc inner radius a and outer radius 2a. At the cen9k+,y pil/gwg-hubtmry9vcj ga 4j5)l6 ; b) cter of 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 conductinvpi 4kf68 awl/g shell has 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 distance R ffwkl 8i64/vp arom 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 conduct:+;+an9pakpcpg v : zkzx l(p7or has charge +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, i:+:a(l7z+ ;g p v kpz9nxcapkpnner 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 chargyy 1jt6pcc, ) ttt 1gu:s6g86 wttsfx;ed conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known thag16ttyftt )w 16cs,cjg yt tx:s68pu;t 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 bhizizlh7a(- (elow that attempt to describe physical phenomena. Which one of the following statlh(( 7hi zazi-ements is correct?