05.20: A portable radio that isksfi3cnn 9 6)s playing is placed inside a screen cage as shown. When inside the cage the )3sn 6nskfc i9 radio stops playing because

  94.21: Which of the following statements about solid conductors in eln7 nawsw87wiqq-k tct ws46; 5ectrostaticq w6-twt;q4 5ca is7ksnn8ww 7s 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 h )n 7bb1rjqkqwjq+ommib3,;+ as positive charge + Q. Which graph best depicts the electric potentiamoq+3,r kw);qim bjn+b1 jqb7 l as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has pos)wei /ld(6sp3j2; pun tv1rositive charge + Q. Which graph best depicts the electric field as a function tji pwvse(;) rund s36/l12poof r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initialxcrxm;t9cb ,9 8txg:w q6hc :q charge + 6.0 nC and S2 of radius 0.040 m and ;q :rxxhqbtc: c w869g,tm9xcinitial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different )h:unhc:5h nlradii ($R_x>R_y$) 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 posdx,0iq(3wekcmgyzczk8 m2 6 8itive charges located at points 4 and 6 on the positive x a kzemw6iq 3(0,kyz cg8x8dc2mxis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere ha-scdze22s i8)6 ua+ u)x nbhqts 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 t2 - q2hi8us)zaut)sd +xne6 bche spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolated in ubd)mulmj,ws6:pg 5n- u u66/r teu-cdeep 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 lot :,5ue -r gu6mlbu)j upd uwn/-cm6s6cation 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 *-oqcuz u8 1x 7-uxf9y uibb f3imw0lu-c a.q9contains a hollowed sphx ubyuquwo9l i*q. cb9-iazc1 0f- 7-3um8f uxerical 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 the spheres is:

  04.50: A solid spherical conducting shell has inner radius a andcc s910 c8is(r 8:pn1gva wmcw 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 density on the inner and o1ca98sc0ipc sv1c m:wg( wnr8 uter surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charg5a+sf c1 i( l-n(3vocb4 nknfde +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 poi (4l c3 1vfncb5(dak+-osnnfint 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 radius R.4ig5fln21 m mu 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 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 gil421m num5f from the center of the inner sphere.

  15.48: Two concentric charg.;km vn*w 5s 9kiio1jyed 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 th 9s1ijm kk;ywvo.i* n5at 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, kfqjh.x:1g (h- pfdjttempt to describe physifhg,-f pjh:dx 1(qjk.cal phenomena. Which one of the following statements is correct?