05.20: A portable radio that is playing is placed inside a screen cage ahl;g* x z 6ur,b2rbak9s shown. When inside thez, * 6gb;h2au9 xlkbrr cage the radio stops playing because

  94.21: Which of the following statements about solid conducyr5r/l d djq,rxwh;xghm 4:pm 8nkb,o 2+2x8ctors in electrostatics are truemy p/wngxb rhr:oj28d hxr, 8,x k; ql5+c4m2d?
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 sp22+r, b; fsyej xpfc:ahere of radius R has positive charge + Q. Which grape22y+;r,pf xcsbj af: h best depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R hag;fb lz/xth9q6 )a3t ls positive charge + Q. Which graph best depbqf)3l6t h/ g latzx9;icts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting 03zjcymo(ag9 spheres (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) are connected by a com cy3z (oag90jnducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, yclt0b*pt1hzl ;;s a5with 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 located at points 4 f37v)vezi- h cand 6 on the positive x axis. Which of the i73vz-)ef cvhfollowing graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting spherv*isk o +/2vcwaj0r q6e has radius 3a contains a hollowed spherical region of radius vk a+c*sqjvwiro/62 02a. 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 conducting sphere in static equil2vfs.3gvcu2 pibrium 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 atgs uvc2v.2f3 p 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 ra./w mu+) biz6g xgt5ril) s;zndius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Takingit.l / 6ui rwx)ns)g5;g m+bzz V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherib edn,)c6t604li 6fwz:bq jvvcal 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 shell to be exactly eqtbv de66 cvij:0 l,fqwn)4b 6zual?

  05.45: A spherical condn z5vh2f. z1f 6 p iwua7+mn-ubpzv/-vucting 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 pointmwfuiz5b-hu -/ va .6+nn zpz12p v7fv B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surro: zbicc4izkh kp *(./84t oqfjunded 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 dj(piq z 4*c8:i f.cb/t zokhk4istance 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 free space. The outer s +-+* u xv5u,vrxwbbvrhell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric potential* u+ -rrxwvb+v5bvux , 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 14zhb /uaezl- k+xsa (attempt to describe physical phenomena. Which one of the followinzb4u(-1laze +hsk/ a xg statements is correct?