05.20: A portable radio that is playing is placed inside a 7-pfg i 2zep3pbhkio7w0+o8 lz7uvi4screen cage as shown. o77buip0i 8-i2gz v3lefp k+7h powz4 When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors innpk+4ra5z l9y electrostatics kla 5yz+r4np 9are 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 charge + Q. *v6t2cj,f7r764 betevfq n ds Which graph best depicts the electric potential as a function of r, the distance from thf*v47,f2 js bn7d t66c tverqee center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Qsy-0tpteoz8. . Which graph best depicts the electric field as a function of r, the distance from the center of the ss0 .oz-y8ptte phere?

  96.21: Two isolated conducting sphereuph kld +c60,us (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)p+6lk c0udhu, are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, wi 7)my i m1jqrgg,bii8 pmwpt2m8d22v5 th 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 cha + eypj c-n1)ul/gah(xrges located at points 4 and 6 on the p (-u+1lcxnjheap/g ) yositive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radm5bsd*fa.9 ma okwd(8 ius 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. Wha9a(wdk md5f8ma so*.bt 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 +ok5vzz f60vnsphere in static equilibrium 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 r=2a from the center of the sphere at an angle ofzv0 56+kvoznf $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere ofc t ti.(ja/f;,xuxf1k radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common c ftcxtk1 . ;ixa,(u/jfenter 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 ;nf l396 j,9drdejxp ja 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 densi xf,jpldj3e; 9 9rjnd6ty on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net +beef;a m2xt,w7q1le 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, e ftlem,e+ w2xb;q 7a1and point C is a distance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid sphere a7atqf2:pv 1ical 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 av:fet 1a72pqa pproaches 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 charged conducting shells are in freg6ycr-;: )pb ts-7m; varu6 behfjx*re space. The outer shell has inner radius 2a and outer radius 3a.- *by6xgr6f pma:;7jubcv hrrt-;s)e 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 dei9i .7kip g:r7mbdjo,o6dv z 9scribe physical phenomena. Which one of the following statements is ov:6ko zi ip .9, mdbir7g9jd7correct?