05.20: A portable radio that is playing is placed inside a screen cage as shuft27e row(7 :oa 2 7pva1rmepown. When inside the cage tw taao:pe 72vre (2rf7omu 71phe radio stops playing because

  94.21: Which of the following statements ab ,x-akie; scxi)t cg(+out solid conductors in electrostatics are t as(-k ;x,)+cegxtci irue?
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 ra8 .zcf +gefta4loipz mze*1b d,8 3*+iya3hl odius R has positive charge + Q. Which graph best depicts the electric potential as a function of+p4o3ai.o m*ye ehd,z b*3gz81tf+ c8lifzla r, the distance from the center of the sphere?

  96.36: An isolated conduct0vnm,-tdhzo v b4+pipj 2( kb9ing sphere of radius R has positive charge + Q. Which graph best depicts the electric field 9v ,j- nvpipkohz(4dm 2b0bt+ as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting sp-lfzms)1- ytu heres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0-u t-s1mlz yf) nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different radiiec,l+e)tu( :7j m-mmvzb -fiu 1j qx0s ($R_x>R_y$) 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 locac7*.ee zho 3urted at points 4 and 6 on the positive x axis. Wh73*uc ezore.hich of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conductwhb9k 7m jtgqtq:: 9.lecf uvst 5r-*8ing 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 figuretg7eh- 9mt lr*kfu5qwvcbtjqs:9. 8 : by P?

  11.46: A hollow conducting sphere in static equilibr ju jyzhh9(i;21 cwgl7ium 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 fromj2 uygi1 jw9l7hhcz; ( 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 holloweuw28ml3cr3 vq d spherical region of radius a. A point charge +Q is placed at the common cemlrc w33u v2q8nter 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 sphericah:i 5/j)kbpmxl conducting shell has inner radius a and outer radius 2a. At the center of the shell h mx)5 bj/i:pkis located a point charge +Q. What must the excess charge of the shell 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 shell has a + c4t3)pvlre -toz2m. wl j5kpnet 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 distanmp 4 ojk2plzcte35 wlv+ t.r)-ce R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. I(b- ieoe7klk dq +*ikvo5yb71g0rz*vt is surrounded by a rg (705 oe1e*ov vd-qi7zbkyb kk*+ilsolid 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 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 conductin lh 6 dj rr.pkrv *fyh2.2576)pubhnbtg shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The intpfbru*l j. ) h6rhpvrn6k22bh7. 5ydner 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 a pre d44h*v4hzttempt to describe physical phenomena. Which one of the following statemenr 4 hhd4ev*pz4ts is correct?