05.20: A portable radio that is playing is placed inside a screen cage as sho(.h(hotre(+5dl e ser*2x boife2j y;wn. When inside the cage the radio stops playing becd(+ rr eof2l ;o*(ee. ty hiesx2bjh(5ause

  94.21: Which of the following statements about solid conductors in electrostat9sw3 oc 8qjyd6ics are jsd36qc9o y8 wtrue?
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 hhso sohl6(0 ,qas positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the cente,6qh 0(l ssoohr of the sphere?

  96.36: An isolated conducting wsksl90z+v /pg ;spy2pys f5* sphere of radius R has positive charge + Q. Which graph bessss5 9pp g+fy;v2yz 0k*lpw/st depicts the electric field as 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(c* d3sbbl*hnh il-h0 initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting l db ih (*-0nhcsh3bl*wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with 9 j2pdr:mey5wfzhf34c9b5p m.4 rwts 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 tw-z ld/rbs eu06fi 8f0fo identical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the z 6ubis fd/f08erl0f- axis?

  03.50: A solid uncharged i 5eh::t yrcusm -c)8pconducting 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 c 8ue pi5r yc:mh):stc-enter 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 stu- nt l)aftxul766+szq8v ml(atic equilibrium is isolated in deep l-f6au (un6t7+8lmls x v tq)zspace 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 of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius 3a contains bx q/e(;(qd,. a.bqnjpx0z q qa 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 bqpq;qq(0ja .(b ezd,nx/.xq r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer zflzfcid wpnav4-;jd50am*g/ nz./ ; 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 fdpfmj 5.*w/lazz aivfzd4;0n gc /n -;or the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting she .j.v.a d7vxqqll 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 centera7. dq .v.xqvj 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 sphericg1,yw,y 5 hk,m h4b94zmcxtq gal conductor has charge +Q and radius R. It 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 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 atghbxmy w5 4g h 4zck,yt1m,9,q 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;nz elpo;u -g5 free space. The outer shell has i;5o le uzp;g-nnner radius 2a and outer radius 3a. The 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 statementshb;e sy4 t9e xh,awk6) presented below that attempt to describe physical phenomena. Which one of the followia; )w6h4kh s,yxetb 9eng statements is correct?