05.20: A portable radio thftzw)bl fpec3 / bdg *i23w6m*at is playing is placed inside a screen cage as shown. When inside the/f*il)3w*c6g dt wmbfe2b 3zp cage the radio stops playing because

  94.21: Which of the following statements about solid con5ukyzjh5 +bh 7ductors in electrostatics are true?7 hu5bzyj+5kh
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 ra f8g98r+stqe25 :nybuj s1mgidius R has positive charge + Q. Which graph best depicts the electric potential as mbu :efjg grq52sy9is 18tn8+a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge +ki1sy o 6u bss(skr91( Q. Which graph best depicts the electric field as a fukriy(u 6 1sssk(bs1 9onction of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spherese/.5+qyc zri+ i nm:gi (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will fl5+i y/gezci.i +: nrqmow in the wire until:

  17.46 Two copper spheresu kbu5osll3; 1 X and 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 identical positive charges located at pql9-+g1z ykt k5xwtb1 oints 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potentitx+ 1z bwkk1q glyt-95al along the axis?

  03.50: A solid uncharged conductinp7 k1)5hjtygw*x1iv4k go, ong 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 sy)jgx ,4koitk5wgh 1no 7p *v1pheres. 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 equiliyt4sa3 ( f t,;jfj:xnubrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at the positio4 f:3yf sjtt;nx(,j uan 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 3-zz- 0+ews9htmzajk8 b t zey+w,)6mt 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 potential at position r =2 a from the center of the9z8b e0jtm-t+w6h z twm )zza+, sky-e spheres is:

  04.50: A solid spherical conducting she* k4yg6fqhy ,f-;tr dcll has inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shekghrq*ff; d,4yt-yc 6 ll 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 shelb -a*z0v2q yit0:nivbl 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 from point A, and point C is a distance R from point B outside the sph i 2*nbzv0qi :atyvb0-ere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radiuszbna 9 )z6y7wx 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 bax76y 9n)zwzB 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 co ra(1twa:gckv vljxby 40spf43+kkp4v :, 7panducting shells are in free space. The outer shell has akv4tjcp ylv:xp7v b0p (4fka3+ a1s :w4kg, rinner 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 statements presented below that attempt to d8ld71x,t a q2k(eh ertescribe physical phenomena. Which one of th q1da k(x7 2,leh8trtee following statements is correct?