05.20: A portable radio that is playing is placed inside a screen w1avx +v7 1zni :,o r3,o1 ygzmb1gxao cage as show vx ao og3gabvmr,yw:zn+11o 7xi,1z1 n. When inside the cage the radio stops playing because

  94.21: Which of the following stalzg 6(03aw)1 ahmjrtmm-tv/ytements about solid conductors in electrostatics are tru)at3-tr(hm6g1 j0a vl ymm z/we?
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 radius R hf46f jnl) qu2ss(ebks* 1p*jnv ysv-9as positive charge + Q. Which graph best depicts the electric potenf n)2s- 6*4j u(1sjb vpveykfq9s sn*ltial 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 + Q. Which bex*bq dvbb w 66ff32:graph best depicts the electric field as a function of r, the di*bv fx6bqeb 3d :bfw62stance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial charge+demlqg3( xzm9kh -7 3cbd0hx + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by3bd-3lh9 (hcdk 7 mgz+ 0emqxx a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with yu:lgll:nvi( ;(axsed nfz1v z8 * 1x2different 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 positiv3mdn ,y wy m0;04 0dwaodaqqh)e charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent thm,w d 0m4 owyy)n0qa0a;dd3qhe electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a cguf51btko76 1v 9hit aontains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from t116kttvo ufahi5bg7 9 he 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 cond(b0pge ( h;(hnbm 7qfd rm*o*wucting sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potentia; hb(no *b(rhp0*dfmm7e(wqg l (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 sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sph d1k- ;c( wf-ntltww/b8nd1yyere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the k1t/ t-wb1n cn;lddw( yyf -w8 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 rad:zf,i pkcxkil pv;-:0 ,aj*m cius a and outer radius 2a. At the center of the sheav:f,- *,c0cmk z l p:jpixki;ll 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 surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q pla x8wl: q(fohg.ced 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 distance R from point A, and point ohwgx(l8fq : .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 e7s; kuulxg9xaa 4tu6ox 4 +5;a mrm4wand radius 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 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 xsu+wam4x e;46rxka;l 7m5gutuao4 9 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 shells are in free space. Thv0w9jy:dc8j z(ta +w fe outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. :z dw0aj+wj8ft9yc (vIt 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 o n0plw)w0) aupresented below that attempt to describe physical pheno)wuw0pl )0oa nmena. Which one of the following statements is correct?