05.20: A portable radio that is plf/m(c+ 8huxgbeur2- zaying is placed inside a screen cage as shown. Whexg-/2r+ h e cmubzfu(8n inside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in electrostatitudnnhx br-352wu 93xcs are tr huux2bt9 r5wnd-3x3nue?
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 radiun0rcs 8* j(lg3uwux l9s R has positive charge + Q. Which graph best depicts the electric potential as a function ofxuu*38 slrw jg9ln(c0 r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positiv+- 0sraork -hc0+wsege charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center -0srsr-owcga0 k +he+ of the sphere?

  96.21: Two isolated conductiv *etchj wg/79ng spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial cwvche97 j/g t*harge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y:70 1 wifulbfz, 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 chart4y6 tct ev+6bges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the +y64tt6te vcb electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radiuz.l* .x6 za;ixn00ranzql,rzs 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distanczz,.ll6z0q r.rx*ia nnz ax 0;e 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 sphue/qsnhxs2, 9ukx k a 7+sp71bere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electrixb 1u+n7,2sxkapq7 es 9h /kusc 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 sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radix)t 8l. b3g:3kmi8(cpbobm z hus 3a contains a hollowed spherical regi3(b8p:i bkt lc mz) mxbg8oh.3on 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 is:

  04.50: A solid spherical colpagch: il:) 6nducting 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 sp 6lica)glh ::urfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net ch51i mp n34uqjyarge +Q placed on it. Which of the following is the correct relationship for the electriun1mqpj35i 4y c 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 chargekg lrii*xy2 z)/hi)c* +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 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 ai z/k )2cxgyhii*)rl *t 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 spacesp00we9wz 0sa . The outer shell has inner radius 2a and outew0ea09spz s0wr 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 state/p;s3woq/dd rt, iar77+i ugmments presented below that attempt to describe physical;7t+/s m 3wpdqi/ ,uiarr7o dg phenomena. Which one of the following statements is correct?