05.20: A portable radio th,sa*-:ctsl j ldeubk la3 2ofi io13/8at is playing is placed inside a screen cage as shown. When inside the cag 3ao28- to1 scdujf,k ls3belilia/ *:e the radio stops playing because

  94.21: Which of the following statements about solid conductors in electa4hxnl a*scd 9 aih4q9 i.sy1/rostaticy4h.daxc 9s a lq*i9nsai/ 1h4s are 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 char+)qkc+qo o) t.h fjpb :wm; pa-kjz41rge + Q. Whicmtw jh:)bkzq +r-p k ;1)4ocjfao.q p+h graph best 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 c (evi uehf4i6 ng)8mfv5/ ,fg4p1jy tpharge + Q. Which graph best depicts the electric field as a function of r, the distapg,g)fu/4 n8 hteepv4y f6i1imv (5fjnce from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m /(fj/887c ,)ex y9 gvl kepkp .cxnjuoand initial charge + 6.0 nC and S2 of radius 0.040 m and initial/ c/ gupop,j8flx yk9()7c .eenv j8kx charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X afkhe mo :*.pe0nd 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 shmh) ap/yj )(bwows two identical positive charges located at points 4 and 6 on the positive x axis. Which of the followin/hwy )pbj)a (mg graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged ysfskg(w5 /d29e8t0y dn 5wsxconducting 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 the center of the spheres as marked in the fis5dytx2fkwsn y05 (g 89 s/dwegure by P?

  11.46: A hollow conducting spherea,4t xh8yu5k+ai8c w w in static equilibrium is isolated in deep space with a net exca+8ha u8 wytwxk54,ci ess 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 conducting8 3tusvorf dn2l3i,w , sphere of radius 3a contains a hollowed spherical region o8 fuirlso,d 2,3n3vtwf 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 from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and xg nj9 4its x)(szwz4.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 oi4g9jzsx( w4t. xsz n)rder 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 chargekb 770d uyul)/;b qhhg +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 shell7bguhdq/ )lbyk07;uh , 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 rn u/(g xov,htwewc irwfw61.(; 6db, zadius 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 sphez(wertv.dhno6 u1x fw6 /icb,g,(ww;re, 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 c81 ucd.wny(ldem pd3( harged 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 that the electric yd3dew .nm8 (u1pcd (lpotential 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 avqpdr/ 3vv j; am5u(i;ttempt to describe physical phenome av;ipu;v3(m/djr q 5vna. Which one of the following statements is correct?