05.20: A portable raduc 89n)a,quyql x g9y8io that is playing is placed inside a screen cage as shown. When inside l q,gxq98uany 8y )9uc the cage the radio stops playing because

  94.21: Which of the follow5 um+xyf h5 e8w;g .myja ab4r*fhi3p1ing statements about solid conductors in electrostatics are tr hf3u1yh b*a48.a j mpg5m;f5+xyi werue?
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 spher1h2g 1ijrbuper v7u 7(e of radius R has positive charge + Q. Which graph best depicts the electric potential as a functio1 v1u e(up7jh7gbirr2n of r, the distance from the center of the sphere?

  96.36: An isolated co)wji 9vir-fv( nducting sphere of radius R has positive charge + Q. Which graph best depicts the electric fieldwfi -v)9ri(jv as a function of r, the distance from the center of the sphere?

  96.21: Two isolated czv r e9ajrt,72n83),x oegkw wonducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial char9koaew3 28 v,7j nx)rwrez ,gtge + 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 differ+eonh7fl vs-+u8n+8ugp ( s1eyk:h rxent 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,0q+e6z5 o1gkx; yjcs isg*u w at points 4 and 6 on the positive x axis. W s,z q;uoj1xsge5c0yg*wk+6ihich of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has x;yv8y*d,/z a2key yub k 9xt9radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placyy8;kv 9exd9xbt,az*k u 2y /yed 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 .ubu us06 rxg8ltu4rvk 2cz9) of7*azk vq)r: 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 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 a z:. 4luau86o*ftvrk7u )q)gc09rux k2vr bzsn angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged con kl+aba34 6xszducting sphere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Takinxa +4bal3sk6 zg V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting sz++dytlgw 24d2 .cnflhell 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 inner4z. wt2gd yf2 lnd++cl and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charqo9z(,tq-exv l4 r8 xqge +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 tvx9e lrzq48qt ,-ox q(he 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 spherical conductor has charge +Q and radius R. It is surrouvpr(js2 o- ,c:zuxv2o-hz gw6nded 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 + -gxwhu 6( p22zoj osrvzc:v,- 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 shekb :v7q* tt)mjlls are in free space. The outer shell has inner radius 2a and outer radius 3a. The inne *:kv)tqj mbt7r 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 attempt to descrixxhhd2sa j e-q )8lt:anl8o*.be physical phenomena. Which one of the following statementhl*hjsxe la ax.q)-2 88:tnods is correct?