05.20: A portable radio thabiir-k2 4/qk gbdoc,) t is playing is placed inside a screen cage as shown. When inside the cage the radio stops i/ik), rbbo-d4qck 2gplaying because

  94.21: Which of the following statemwzckwt+ (wd:/ :/;zg9 8rsw+ vtgrhjhents about solid conductors in electrostatics are true?zdg:v/wwwrj+zg t;9wsthc (r:k+/8h
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 Rbztt:(tplpcy8n +qr s0rfa6vd*h(.. has positive charge + Q. Whipzbt8(lqpr0: c * ty+6t.sv d (nahf.rch graph best depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting spherlfs soi)68)hf/a+is ze of radius R has positive charge + Q. Which graph best depictsi lszh f8)fas+/) is6o 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 initiz:nj6ewl xl 3y ed/ba1,v58x ial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a con lne3xi8 5/,wvdyz:a16jbex l ducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different ryb*jou)7y t 3madii ($R_x>R_y$) 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 poski5 eg(p9bnl amea6ste/51 v9itive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represeneil v1kas/ebn96g5pe 5(t a 9mt the electrical potential along the axis?

  03.50: A solid uncharged condtf9xmc0hkn-2u lc3 ckn ro;tmt1 u- 54ucting sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a k02t9ouu;ccmtn3rxmhfknl- 41t c-5 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 figure by P?

  11.46: A hollow conducting sphere in stat)v1wnm- egej3gin gsp h-8.d 1ic 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 pos8) nn3igmdgv .hj- 11eg-wepsition 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 a hollowz7t3 v5q /ohemed 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 ce 3ehqv7tz5m/o nter of the spheres is:

  04.50: A solid spherical ce)km -mskxa1* nr1 lh0onducting shell 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 shell be in order for the chhr-0 e)x kak1m1nml*s arge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting nn1 e dvc ndwcec5-)+s2my-s:shell 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 sphere. As r go v-c1:e+sd2yd5c -ec smwnn)nes to infinity, V = 0.

  07.42: A solid spherical czclpsae2sv;f+ 6t2 yf/csx ;0mn n,x7onductor 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 following6n a ;cen,f2f+ptl x/ scmy;0s7sx2zv 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 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 conductg:8f,tjjqqx;w a6 gw.ing shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is knowtj,86ggfwx;: jq .q awn 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 s/6ik3 u)v+jb,pbve gglhr*(l tatements presented below that attempt to describe physical phenomena. Which one of the following statb()+bu g/h elv*kp rj63ilvg,ements is correct?