05.20: A portable radio that is playing qjwhemzciyx/, *v;q;0 4+al xis placed inside a screen cage as shown. When inside the cage the radio stops playing because,cmizxv j;l; 4w0eq*hxy a+/q

  94.21: Which of the following statement)r hsh+oruqk )f:+ oxahn3w*/s about solid conductors in electrostatics are true? + :+ohauh3 *ko)x/wfh nqrrs)
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 lq /5r*4 wrqiahas positive charge + Q. Which graph best depicts the er5 q4irlw/ aq*lectric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Q. 4 qu.u4qamo0 wWhich graph best depicts the electric field as mu 4 wquoq.0a4a function of r, the distance from the center of the sphere?

  96.21: Two isolated conk+05zsv2 efdaducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius feda250zs v+k 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and iqr6z. b 9h-byY, 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 po s6qm+3t4 tbxksitive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the axis? k4 qb x+t63stm

  03.50: A solid uncharged conducting sphere has radius 3a contains a holg0ex v(ctv gk0ucg-: 0lowed spherical region of radius 2a. A poiv cc (gut 0:-x0ek0gvgnt 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 equililrrj3p,g ld7 /brium is isolated in deep space w/r3 gll 7rpj,dith 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 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 c **urnco/6u o b-da)3hp(adw-oap2 ybontains a hollowed spherical region of radius -/aohb2aor odp *wb6ypudc )na(-3u*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 and outer radih4 )m w7w0wj5grfrh5ygb(tv(us 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 c(b5 mh0 5ww(g)f vy rjrtw4hg7harge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a n,9+ xljqfl8kg6h2dt jet 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 t xhqk9 dl,6 8+ljfgj2shell, 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 spherical conductor hasg.av3 bm3ihr9 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 the diagram? Assume these objects are isolated in space and that the electric potential is zero as the distance3ar mgvh93 ib. 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 ar.:aybl4y6ziek555s ri t+yxq e in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the eliz5l6s4y: yba5qe5t.i+ rx ky ectric 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 fyv8+ b s3q(f7/epdud statements presented below that attempt to describe physical phenomena. Which one of the following statvfp3/fe ud( q sdy+87bements is correct?