05.20: A portable radio that is playing is placed ind lr1d 4x:tvo,side a screen cage as shown. When inside the cage the radio stops lr :d ,odt41xvplaying because

  94.21: Which of the following statements about solid cybg z(0mcz4zh ez obqv9kpw ,62.fc81 onductors in electrostaticbzzw ofk2(ce91p4 h8mcq,6.zg0 zvybs 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 sphere of uw55h+p6 v adyradius R has positive charge + Q. Which graph best depicts the electric potential as a functiohyu5 5aw vp6d+n of r, the distance from the center of the sphere?

  96.36: An isolated conducto9.jot p)/zpr-y r7hn ing sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r,/o rhorp.-7ty9)pznj the distance from the center of the sphere?

  96.21: Two isolated conducting sphe/dum+s/h t(dh res (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.mu+ h /td/sh(d0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper sphbroct5oi7cx :4zl20 beres 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 identical positive charges located at points 4 anti 37iov 1ffzrnw51.8wc;igf v4i- m nd 6 on the positive x axis. Whic 8f-n; 7rv.nogw iw 1f1mi5fvz t34iich of the following graphs best represent the electrical potential along the axis?

  03.50: A solid unchargedo- .ow-q 30sjkasi1z l conducting sphere 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 1wzk.aoji--s03s qol from the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is n0(l++8bq+ ko bhxqta2 rkugv *+fmc6isolated 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 sp 06rft+ qu+ 2blmkk *a8nvxg+o q+(hcbhere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius 3a contains a + pljqa8 tpo(*wlbd 24hollowed spherical region of radius a. A point charge +Q is 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 is8pl*db lopt4w aj(q2+:

  04.50: A solid spherical conducting shell has inner radius a and oup 2r8j d9gri,vter radius 2a. At the center of the shell is located a poinrg8dj 92v ,iprt charge +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 shelj 9slyq5+tey 7l has a net charge +Q placed on it. Which of the following is the correct relationship for the elects 5e9 yql7tj+yric 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 ok(*utqio tcf(3e* jh- )plc/charge +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3R. Which of the followinglco/3o*c hj* kutpif te- q(() 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 charged conducting shellsm.1/6h.b0hmsygq0i)ve v gn n are in free space. The outer shell has inner radius 2a and outer radius 3a. The ivn.sgh.00gb m)qh/i enym1 6vnner 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 seves t v6lf0.9x y:b/ juw*eia73wponuq n9fq2s;ral statements presented below that attempt to describe physical phenomena. Which one of the fa;tfi n/.pq*6vs997lu3b 2o:jse quyfx0 wwnollowing statements is correct?