05.20: A portable radio that is playinv5p e;k-ah nl6g is placed inside a screen cage as shown. When inside the cage the a 56lk;hvep-n radio stops playing because

  94.21: Which of the following statements about solid c u/e6q3b(6i0wa aush5y4f6gi ihfzrdr(h y 95onductors in electrostatics are true? hifyb60h4uayqiwge9d a(5 fizrhu65 / r3 6s(
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 radxxw,0mt4 e acr;6doy3ius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the cex0ya6ed4o xm rwct3; ,nter of the sphere?

  96.36: An isolated conducting sphere of radius R hqwyf :81v:hemas positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center we8vq1:yfmh : of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 i7i *;ku auiq2m(n cu+m and initial charge + 6.0 72( iiakuc*;mqn u i+unC and S2 of radius 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 Y,)c vpo /)g3bfd 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 loca*kh(zp -qc+scted at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along thekc(sh-z* pc+ q axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hfzyotisnda.p9iq*n f8h; ,9 4ollowed spherical region of radius 2a. A point chariq4. any if,fo 8zst; 9hd*9npge +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 9)y63k //cb)rlly,chwhhb itequilibrium 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 fi rtk9h6h/ ,lbb)lc/y wy ci)3hgure? 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:70y+/u dt;iy bvl o;ehx97zwps7mxm of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed ax pw:im; yso uhmt x+l9v07d7eb;/7zyt 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 awsb/kr;s6a:ch oi3 5 t and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shelc/3 :k5 sa;s rtwhi6obl be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting /)8/b47dqwbaq n xsgvshell has a net charge +Q placed on it. Which of the followinggq8bda 7b s//n wxq4)v 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 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 k47jwamxz*6 skxt: *.(malrs 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(a saz:7mr*6*t4 sk.lwx mx jk is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged conducting shells are /.8 on89xmieobc ,w+z klky 1xin free space. The outer shell has inner radius 2a and outer radius 3a. The inner she8.b1my kc 8 ni/oeow9+x,kx lzll 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 attem7qp)l rndrjx 4ubw00*pt to describe physical pheno w7b l)xjn4p00qd ru*rmena. Which one of the following statements is correct?