05.20: A portable radio that is playing is placed inside a screen cagen.lgjo6nq /qj j*t 8a) as shown. When inside the cage the radio stops pla6q./joq)ant g nj*l8jying because

  94.21: Which of the following s/l z klaan:i* ;a:mr,ntatements about solid conductors in electrostatics /,al:a :rli am;kn*nz are 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 spher.k.e:- ou2 n ud f(5k.hv8wimgv )noywe of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of thkg(k5 o u:)d w.2fmveou8nwy-.. nhive sphere?

  96.36: An isolated conducting sphere of ra 2dujie50 9s7/p wpvfjdius R has positive charge + Q. Which graph best depicts the electric field as v2j7swd p95je0ipf /ua function of r, the distance from the center of the sphere?

  96.21: Two isolated conwi(czsha; v *3ducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and i3caw (;z*i vshnitial 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 dv mpno aq;c9yhql1/6s pr -3p.ifferent 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 posiq5rk ;sp-p dth72gyh.tive charges located at points 4 and 6 on the positive x axis. Which of the following graphs be sh72 pd5pqy -;r.hktgst represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a mi g9; i7 hsp9k9jmjvux+)-hi contains a hollowed spherical region of7vpuh9;i)i+j -i9gmkh xs 9jm 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 marked in the figure by P?

  11.46: A hollow conducting z-iah3e(m j(dot6wnyfl -1(w 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 6-t( e1lfjwd(-a z noy3im( hwof 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 gb or .+)pw+flcontains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking ) b+ lgp.+rwof V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shenzqhq)(l:5q1kaa z9r ll has inner radius a and outer radius 2a. At the center of the shell is located a point chargeqz r(k5z:)aqa 9l n1qh +Q. What must 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 has a p/op m79gcoh-q:94dt r: cvb enet charge +Q placed on it. Which of the following is the correct relationship c:-7b9hp 4vtp :moqce/ogr 9d 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 surrounded exyzas i24-bokuat 25y )9nv.qn e 30xby 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 is an infinites)4aunebtqai e. -ys03x y2zv5o 9n2kx imal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric chargedq 8(y.xv bdog2 conducting shells are in free space. The outer shell has inner radius 2a and outer radiuy qg2(xvb8 .ods 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 presented below that attempt to describe phy)gcpxepb;4 v /sical phenomena. Which one of the following statements is gpb pe/4v; )cxcorrect?