05.20: A portable radio that is playing is placed inside a screen cage iib )u0.qej87gza cj2 as shown. When inside the cage the radio szi7.qaj i0ub8jge c) 2tops playing because

  94.21: Which of the following statements about solid co9qm: xpjj;z(hy. ,zva r:lus/ nductors in electrostatics avhl z .: j,ya(;su/9:jzpxmqrre true?
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 ,:sp 6.fy( oigpgcd,gsphere of radius R has positive charge + Q. Which graph best depicts the electric p ggc6ifs,: ppg,.(o dyotential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive fvt pu-ec1+tvg 8vuy, (4s4evcharge + Q. Which graph best depicts the electric field as a function of r, the distance f1v,ve-8st4v y(u gftc u+4pv erom the center of the sphere?

  96.21: Two isolated condo91ljg:me(cshzo *: ducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m anchj9(ze:od* lg o s:m1d 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, with dif/rt -h ga9xqu*,:tmniferent 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 id7 vkeym8m) o+fentical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs k7+m)fev m y8obest represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a holux s6/7/ljted6ys ru 2lowed 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 y2 et/sdsx6u67rj/ u lmagnitude 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 equilibrium0: dg zu/. ,spgir i8/jpirjvqdsi/49 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.rd/i vuzs//i,j dj:gsi0 894rippqg 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 c4c2ed-q0 cqmz ontains a hollowed spherical region of radius a. A point charge +Q i qc-zq c2dm04es 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 ra711phqs+ eqp ndius 2a. At the center of the shell is located a point charge +Q. What qesp+ 7p1hnq1must 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 equal?

  05.45: A spherical conducting shell ha/*wdbc: nz b49hj4b vjs 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 h 9v :b/4zjjn*cdbb 4wdistance 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 surroundedcp hmxb:rh 5gkum,/v 4 0 i6 /j*gj(:e/jeamve by a solid spheric*vj b5p(r j uxmaghkjm04/6he: ,/: mvege/ical 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 is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric chap,*z5jk hnhkai17 6d :fjataof ,cg91rged conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is knooi 196ah ,a,g:7jkc5 fdazhjnp*t f1 kwn 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 presel1(-pukxoe 9a nted below that attempt to describe physical phenom xukpl9(-oe1aena. Which one of the following statements is correct?