05.20: A portable radio that is playing iq na3) t;a)osts placed inside a screen cage as shown. When inside the cage the radio stops playt)ta qn3o;s)a ing because

  94.21: Which of the following statements about )cy rb7uje9t3+ i:xny solid conductors in electrostatics txby erc97ji): 3nu +yare 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 hmnt( 5nw8 jowg7q:2vxas positive charge + Q. Which graph best depicts the electric potential as a function of rw g2vw:8tmxn(5j 7noq, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of rading ugte+ tcy(*zgl;1: us R has positive charge + Q. Which graph best depicts the electric field aslgtgny1e ;u *(+:tcgz a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial chai r0o(oj5r6sris4n +8 sdgau,rge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 n64i,asnos5 oris 8r+dj0u(g rC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different rad- :wjx 3dkg/wt4q omd6ii ($R_x>R_y$) 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 ip * vkc:em: rg dwm.200tojbz(dentical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical porg0mmcv w0o zk*pb2 ::dt(j e.tential along the axis?

  03.50: A solid unchargek0gkq3c2 .9 m7s --wf jzgiozod 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 tho jk.mg0732cfkz igsw oq--z9 e center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium k yku1vw3 c2p+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 v+3wy2p kku1cr=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 3a contains a holl :ytg+gy3/ vk 8-. e/i r,wqcbfm3sskkowed spherical region of radius a. A point charge +Q is placed at the common center of the sphb8 mry,vwt://k-s3iyqk.s+ck e3 g gferes. Taking V = 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 rx3 6y*n;yqb8zqwalfi k58(ya(ele5 nadius a and outer radius 2a. At the center 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 qexnk58a;y l5lwy*bi(fq3ze8a 6y (ninner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placedfa)3h(sq +vv go6/n cs 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 from point A, and point C is+g 3q/sha sfvvc)o6n( 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 i;45hsc au:vs/4ocg u hs 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 space and tha4;5hac suhvg/co 4su: t 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 cha g5:lmwp a0.kgrged 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 th:wmg0 .a kpg5lat 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 to describe phgu(a s 9o.f vm:/r9vvja 6j4dhysical phenomena. Which one of the following smvgjsd(9a9v/ v4h j6.o : aufrtatements is correct?