05.20: A portable radio that is playing is placed inside a screen cage as 6bf.ube rcr.5ttm5 p2 shown. When bb.6ctup. tf m5e5rr 2 inside the cage the radio stops playing because

  94.21: Which of the follo w2dncn p*;h.o 9pkz6owing statements about solid conductors in electrostatics arhdp9c ko p*6w;2n ozn.e 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 b lyb0w; gw;*bhas positive charge + Q. Which graph best depicts the electric potential as a function of r, the distancyb*;gw l0wbb;e from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Q. Wozy 6f*k,9va dhich graph best depicts the electric field as a function of r, the distance from the centeoz *6f9k ,yvadr of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial charlo dea/+u 353tmp qtr6q6,spw ge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are c6t 6l,wmaoedtr 3pqus/3p+q5 onnected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres s .1co58us c5uu2kj szlepr60X 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 locabvapul3 /ay 62ted at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along y a3bpla2 v/u6the axis?

  03.50: A solid uncharged conducting sr0 hu/t zc: -vwnt*oa4hj/ds5 phere has radius 3a contains a hollowed spherical region of/ad0hc :v*n/4z-usjrtto5h w 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 figure by P?

  11.46: A hollow co 6r)1ksk jbp/ejx /pmq2brk zl-uo :90/z2xsmnducting sphere 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)rs1-zs/6bjbmrz0 :mk9/kj o 2qkl ux2ppx/ e 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 hollowed s )aq fqv46-/30s ipmzlte00lrjxj7 ccpherical region of radius a. A pc q3e600vjtc7i4/mfa)ls-r l0jq pxzoint 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;. kxe/qak1z 6rjfe3t conducting 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 charge density on the inner and outer surfaces of the 1.zr3 aqfxe kj6t;k e/shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on idq*44b e0g nu7 khjmp;t. Which of the following is the correct relat4e0h74km * nudbjpg;qionship 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 goes to infinity, V = 0.

  07.42: A solid sphericalo;x p,n( h6r7biffii*n; gua+ 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 tha;; ,i+ro ghibp fi7x*nnuf6(e 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 conducting shells are in 8;xkt3* z xxwjw2m5lmr5 gwx( free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electrix x2gm*r j3;k l8(5zxww5xmwtc 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 describe r:t7:uq**kb(d/fa ay.)th2jcu n-cp *gvqugphysical phenomena. Whichpaayk7vq .*r*c2g/):g t(u q:uftnjcb*-hu d one of the following statements is correct?