State the law of conservation o0 rkav. xukx -snvu2.:m-;pvyf electric charge.

  Is it possible for tv-,8 9x1nb 3a n 4n*ljwk9sycu.k0n fwnle+vx wo negative charges to attract each other?

  Is it possible for a positive and a negative charge to dg+u+ a0zjw(r /-iyuqattract each other?

  A glass rod is rubbedg(0m. jw ro8(s qdmv8o with a piece of silk. During the process the glass rod acquires a positive charge and the s o8vrowqjg (0m8ds( m.ilk

  A proton carries a

  The model of the atom t7/gkxxceo-4o b/gw: x.+ye lshows a

  A neutral atom always hasxkbuc) 89;7gvzf ;vcayi7* q3 xmv6we

  An atom has more electrons than protons. The3 f3y9z- rntct atom is

  Materials in which the electrons are bound very tighwph 8b6o q2*pxrasam4u er+;8tly to the nuclei are referred tr6x eq wor48+sauh p *82bam;po as

  Materials in which tlxmhk :q (6vy/he electrons are bound very loosely to the nuclei and can move about freely within the material are reqk6 vy:/(mx lhferred to as

  A negatively charged rod is brought near one yiyxp)pa9( 2 c 2c:awwsf/z:q end of an uncharged metal bar. The end of the metal bar farthest from the chacayw )qaf:2y(2i pp:cs x /9wzrged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are placq 0 m:6nz d/p)xaity+ked near each other on ad zm+pk: 0y6/ qxi)ntan insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively c h9ax8kj9f zk9harged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched wia4 ij06 dg+omg o6g5b0doidk(th a positively charged glass rod. The eli oo60a0ig b +g(6d dk4mo5gjdectroscope

  An originally neutralb,h tk xand. -4g6m-vi electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed,at--vdhgm ., 46nk xib the electroscope

  A positive object touches a neutral electr*9o;py, tsgzooscope, and the leaves separate. Then a negative object is brought near the electross,gtpo 9o; *zycope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an inx 9av ,fh.xf2n ne,nwyx h518tdiu/q9 sulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the fn 1 ,texiyx8xd/.,qnav2fh9nh95wu path followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constant tqi fg cv0i -tk.q33t7 cuww2 f*ug53p$k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The f, +v+qojxf9qnpn;g i)irst charge is larger in magnitu n+qgx i,pfjqo ;n+v)9de than the second charge.

  Sphere A carries a net charge and sphere1wo ok9w;,g0 xw1ziii B is neutral. They are placed near each other on an insulate;kwx i 01owz ,9wiog1id table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other c ps f6k5w1* fwxx-v7lwith a certain force. If the charges on both objects are doubled witwkxlx67sf1vw*p 5f -ch no change in separation, the force between them

  Two charges are separated by a distance d and exert mutcuq5(pfns +: pual attractive forces of F on each other. If the charges are sepas cqun+pfp5 (:rated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with ys/ z: e3cxpg5a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to ozey x :c35s/gpne-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. dthoa/ch 41c3 What happens to the magnitudet/oh1ha3d4c c of the force on the proton if a second electron is placed next to the first electron?

  An electron and a pro 5tsc 8bawm+/mton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electramb8+ts cw/5m on if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hiz2;r:i-rm o.2kiddy appens to the size of the force on the proton if the electron is moved 0.50 m cd2 i:iy;rrmk2.oid -z loser to the proton?

  A point charge of +Q is placed aaf yzuio .gp+zy7it poq ( 2d9(ay1i-xi+1yh:t the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic fo2:(f(yiqhzo y -iii.zy +pgup oa1xdt1 9 ya7+rce acting on the positive charge at the center of the square?

  A point charge of +Q i /ec ccqfd z0g,43/nmis placed at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitud /ce,mz3cgf qd40cin/ e of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not; s+iwyxuekd 4nz)4/id sbu38 a vector?

  At twice the distance from a point charge, the strength of the electric field*if2nta n;x y3n7eu j/

  Is it possible to have a zero electrgt;4vvs.w01 d8dt hkcic field value between a negative and positive charge along the line joini.t sv8v1 dcwhdk0t 4;gng the two charges?

  Is it possible to have a zero electric field value between twl0ru2:asemp;np(w r ; o positive charges along the line joiniau(e2 wr;ps pr0l;n:mng the two charges?

  Electric field lines near psitivean*z(r 4cn klycn/9, 0ygxh 9 +zs3ztw f2gfb6 point charges

  The electric field s6jxt m *)lj0wshown

  Can electric field lines intersect in free spacm;d4ba 1ot gl-)-z,, hx0vz phoc4zxqe?

  A solid block of metal in electrostatic equilibrium is plilxhi*t.0 rhr/a06i j aced in a uniform electric field. Give a statement concerning the electric field in the block's interixr / 0jiah6l* hr0it.ior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eacb qq5fx mdhfgn 0(,07:mn+kwi h given the same charge, the electric field (E) midway between the center and 7mfxk(+ hf0nqm 0,wqdbgin:5the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform j *t rg0g)1gl vm;)coep.t6b velectric field is directed straighvtt0o*; bp)gmg l v.1e)crgj6 t upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electros hg19p 6d e29/uj+yxmli6p uqhtatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grounpw11odr 5wm 4txe w03sded. As compared to the case without the hollow sphere, the electric field3rxwsm 15oe1d pwt 40w at a point directly above the hollow sphere has

State three properties orz3fp g*m.mzy/g20+ q-yghe ef conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is 6* x wl/vnyu4e$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2.00 mC. How many m,z ztf 2 bh,;xh iw;e(7x;(yhpxeftc- ore protons than electrons does- h ;t2f bx((,hp hyfcw;x7iez ,ext;z this piece of plastic have?

  What is the charge on gn4qr4u rm-7t qkg*e /1 kg of protons?

  An atomic nucleus has a 8mhlov)/ pv1gcharge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm, have charge values of 2.0 6:jwc ;yu ucw0and -4.0 mC, respectively. What is the magnitude of the electric force between ccyw u;6uw0j: them?

  A 1.0-C charge is 15 m from a second charge, and the force between ban2,wg q44es vzm,y1 them is 1.0 N. What is th2z 1beyn4 m,, sv4awqge magnitude of the second charge?

  Two 1.0-C charges have a force between o0nu1 o,hvw ox/96u fjthem of 1.0 N. How far apart are they?

  The force between a p qv21; qrznqu:xq m2($30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If0av h/s70 cote cxa24h they are moved to a new separtaa c7/hes0ho2x 4c 0vation of 8.0 cm, what is the electric force between them?

  Three identical point x u:xm2c fn bynb+3b29charges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to+39bfmnc xb:2 xuy2nb the right at x = 50 cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are 3wq6tncn;fdc-kr9hr6i6m2c placed on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at t- r;ktr3d2w9c66nmcnf6 hiqc he origin?

  Three point charges are located at the followingl4suw 28;1k+gruehiv positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5u2;kl rhie8 s4 1+gwvu.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square,6)6atndhba/yax66gd 9/ra vc and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force69vg /)dd6naby6aa tcax /r6h that acts on the center charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m5yc7 qgmq9oav5dc7 *l); Q3 = 5.0 nC is at (0, 0). What isy7l c 9dm* 5caqo57vqg the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 2xrj87bakwdr-8s mfr m o3xwj7xz:*u7 *byr 9= 5.0 nC is at (0, 0). What is the direction of the net force on the8z :j9b7rr-xob72m r * kfwamur3 jw*ys8dx7 x 5.0 nC charge?

  Three identical charges o ok2jdzu8w207l/i y7oll ny b+f 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts onjlz 28/yll0wonu7 yd+oik72b any one of the charges?

  Consider point charges of +Q and +4Q, which are seu5ffgw :fhl 7.parated by 3.0 m. At what point, on a li5.f:ffgh 7ulw ne between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at tu niyf8 *hdx9lf15cs :fl :.gche origin and a +9.0-C charge is at x = 4.0 m. Where on the x-ah1*xlc9 fc8 gs5.d lfuinf:y:xis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and chafs)jf d2l-./ x3wi;2nj wg7mqx0b m wcrge -q is placed at x = 2a. Where can a third positive chargwgfmbn)7 2l2i; mqwc.x3/s jx0-w jdfe +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 eie he+c tcz1,l8:o p-kfo2:q g. A total of $4.0 \times 10^{12} \; electrons$ are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?

  An electron is held up against the force of gravity by the attxstlm cq* t- k4g(9x4ss8v5r oraction of a fixed proton some distance above it. How * xst4k9 s(r4s-mvxqtol g5 8cfar above the electron is the proton?

  Two 0.20-g metal spheres are hung from ak 3 k(3z,2vni;wef din common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threani; 23(zvk3f kiwen ,dds is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the -zwzr(h s*ntk(n sxgm( ,0z3 .im4kvf magnitude of the electric field at a distance of 1 tm(nkvhrm *x 4gszz3,(ns.i-z 0 fk(w.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a dimr(y6yq 5rwwq2t 0 ba:stance of 1.50 m from a 50.0-nC0 6y(r2taq wqy5wbmr: charge?

  A 5.0-C charge is 10 m from a small test charge. Whs1h; 1f8diocg at is the magnitude of the electric field at the location of the test charge1d1cf ; hg8osi?

  A 5.0-C charge is 10 m fr+8mbyfbb)t/ ;js kr l;l50 ree, 4oojcom a small test charge. What is the direction of the electric fil,+ ) ;bb;lk b0mto5roeerfjj y4/cs 8eld?

  A 5.0-C charge is 10 m from a small test*3jco0g,c kw q charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location oowcjc3g0q, k* f the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancx )l2a5s7x/aqzx- sm );jvhhre of 4.0 m. What is the electric field at a point midway between the)svq7m ;aha2l /rj 5zs-x)x xh two charges?

  A 5.0-mC charge is placed at the 0 cm mark pi,r ;v4xiuk( of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mark( 4xr,i u;pkvi?

  A 5.0-mC charge is placed at the 0 ;nm);;tdc 20 rwkce qucm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges isc 0 qk;e ;);nuc2tmwrd the electric field zero?

  Two point charges of +3.0 mC y: evogy ;7k)y:: iqsvand -7.0 mC are placed at x = 0 and x = 0.20 m. What is thei;)g:ysokvv qey: 7:y magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at (0sp9w1ze2x65 f6l bdv)kgyfyp1s c x the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric y)0 w5bpp d(sykg6f1f6ecsl2 xz 19 xvfield at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cordn7+j56 cauajt./ gl vners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). What is the magnitude of the electric jd6u.a cag/t n+lvj57field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniformc q vdsap7 ii+:kw7/2z electric fdq 7v a:z7ck/ispwi2+ield. What is the magnitude of this electric field?

  A particle with a charge of 45yft n)jm.n 5o.0 mC has a mass of $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass e8c(b6x f 9u*bbkl7j u0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspended6l j uuf8b*(kb7 cebx9?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed lq;3qi75,s.ihnto 4q 8c.lemc tna,jinside a uniform electric field, and is suspended against the forclncmi l8asnoq,qi.h3,jc7t t ; 54 .qee of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magngp acv898,fw78r j,9hizcxx m itude av, g,cxi88cmr zjfx7 w8p9h 9of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm cs lxvvr1. /g;farries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the spvr/x1g lf s;v.here?