05.20: A portable radio tha c .go.q0guk;5jhv a9rv v1,o basxi*0t is playing is placed inside a screen cage as shown. When insi1j0o,.5bqvv g9xg*k0our a;.vahcside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in 8 m1 kkew/z;cwfh60um electrostatics are true6 mw8ckk fum01;z/hwe?
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 cond ylf cyav,q+0/zz wq:4ucting sphere of radius R has positive charge + Q. Which graph best depicts the electric potfvqcl,q0 z /w:+a4yy zential 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 + Q4x5 ;j6/m0rr mhizxj b. Which graph best depicts the electric field as a function of r, the distance from the center of the spm65 rji0;zbj /m4hxrx here?

  96.21: Two isolated conducting mdb76x 1c-s ctspheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge1 tm7c6sc-b dx + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheresw ix ;rj5eyulwxv/hcl02c 5-fd9x: l0 X 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 7dm l/ an1na.s/(f9a bva1scyidentical positive charges located at points 4 and 6vamas/.lb n/a sn (1791d cfya on the positive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting spher5 a b+zodgk+0dgjh70:k hrd3 kdq(ar1e has radius 3a contains a hollowed spherical region of 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 marka0dohg1dd7 5a3(0d hkr qbrk:jkg +z+ed in the figure by P?

  11.46: A hollow conductyo)9hl8s 1p.l7 ytsj 4w:ey zding 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 centerd1 j ps )oyyt s9z74le8lhy:.w of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting ko3v r)6.iew/eu+i wxsphere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , th6e /vk.iu e)+riwwx3oe potential at position r =2 a from the center of the spheres is:

  04.50: A solid spheric(w r4em/lo 4)kb/ataxal 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 aeaw)txr (bkl 4//4m osurfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it. Whick+ kzeuyy0-uy+3hn( hh of the following is the correct relationship fh 0kz nu-+3yey+kuy (hor 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 radiunn(h4yp8 mfm( s 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 labelefnp myhn((4 m8d 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 is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged condus(o(zg v jap)qlgz/56cting shells are in free space. The outer shell has inner radius 2a 5 szzg aqo/jl6(vp)( gand outer radius 3a. The inner 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 preseng( hov3*.z7ox)t-kvcs9l m dnted below that attempt to describe physical phenomena. Which one of the following statements is lhv(9msc 7 o.-n tgz*3k)v doxcorrect?