State the law of conservation of e o4u(0l4o79fvvfp fxalectric charge.

  Is it possible for two negative charges to attraml)/d(c;36 ns1y 7nio jwfhz/tq ov ,mct each other?

  Is it possible for a positive a e (xy,nun(1vsnd a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. Durin8 .4a5tp zvpias+33 ymaaa b(dg the process the glass rod acquires a positaib.a a4d83 sz 3+ ympa(ap5tvive charge and the silk

  A proton carries a

  The model of the atom sho pg9 zvf z7ku *mqvsizjp;5.* j7lm31wws a

  A neutral atom always hqlx 10nh26v fgbmu p :,w*jjt2as

  An atom has more electrons thau5)ntn,wij( v n protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei g+ :tm7egdel/,uju5 w are referred udgtelj/ g,7 +5e:m uwto as

  Materials in which the electrons aaqooxf,525y 47js owh re bound very loosely to the nuclei and can move about freely within the material are referred to4f5,2 oa7o j5 whqyosx as

  A negatively charged rod is brought near one end of an uncharged b nh47 vbp4b65on) qpjig8rx, metal bar. The end of the metal bbn 7hxb8v,p 6j pr45)qgnibo 4ar farthest from the charged rod will be charged

  Sphere A carries a net positive 8 z;xut8- xvd (bk;x; urbonz2charge, and sphere B is neutral. They are placed near each other on an insulated tab;zvxk- dro;x;u8u8zb tb2nx (le. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrosf3k k )s;ds) k*ftg 5e(xgmny:cope positively?

  An originally neutral electroscope is brief2s36 vee vzkp;ly touched with a positively charged glass rod. The electroscopvvezk 63p2e s;e

  An originally neutral electroscope is grounded btms z9s 11sglm ou9 w)8mre+5priefly while a positively charged glass rod is held near it. After the glass rod is removed, the elemm51ou+ tl) 9wr1 zs 98essmgpctroscope

  A positive object touches a neutral electr t:-ef;ewn qff/y6n1doscope, and the leaves separate. Then a negative object is brought near the electroscope, but:w dn/ -ntqf y16ef;fe does not touch it. What happens to the leaves?

  A large negatively charged object is placed onum+vfg8 pytalo:/-o3g c-*xf 9 md3rd an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the path followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch the negative object. m gfodcm-+3p9*r3xto-: f /a gdlv8uyAt 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 -q mr3zr y 3; 6 zcot;(ywclfa+r+i;hbconstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge ip ,u- j :+s,m47jng eisr8tilms larger in magnitude than the second ceu: ,mm 7t4irs- jginp ,8jls+harge.

  Sphere A carries a net charge and sphere B is neutral. They are placeu. 3o9m xdkxkz6;/pu 0zxww0h d near each other on an in9u 3w/zd 60kx;mo .pxukx z0whsulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the cha/t b3sjt* ei+ia,(tj prges on both objects are doubled with noij/ji ta(tte p,+b s3* change in separation, the force between them

  Two charges are separated by a dist(9k)wsbzb c gx;p /krj vm7d. shp:c3.ance d and exert mutual attractive forces of F on each other. If the charges are separated byh3 cb/p z;px (c)k9rgm.dsbj:s.k7wv a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other3q0iskyx qu( 4qe;e d;rh vd86 with a force F. What happens to the force between them if one charge is doubled, the other charge 0d;6;shx e ued34kqy8vrqiq ( is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton arelhtd7on+as /j1th) 7 b separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is plac b1a sjnt7h)+o7hdt/led next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What :h,g o (x2xwckhappens to the magnitude of the force on the first electron if a second electron is placed next to the prot,gc:khx(xwo 2on?

  An electron and a proton are separated by a distance of 1.0 m. Wh sw2snf aa x5jzu -a;k+*t3f,sat happens to the size of the force on the proton if the electron is m*2fz3 swafsk;j5-su ntx,a a+oved 0.50 m closer to the proton?

  A point charge of +Q is placed at t4wd1-hgc5vr v9cglb,-qjlacu(c6. 7n vzq / 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'b(uclvgh6951 r,q 4ctqj/a wvv.nc g --dl7 czs center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the diepa9.n;heh x1.(u,r jok .z 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 magnitudkuioex.jpa.r(1e 9,.zhn ; dhe 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/;aqun g)zl )m)4-wf cxkl4tq a vector?

  At twice the distance from a point charge, the strength of the electric4w;vn /d)jmcf field

  Is it possible to have a zero electric field value betwe/r (rttz: xpq5-q art4en a negative and positive charge along the ttqarq rrp/4z5(xt- :line joining the two charges?

  Is it possible to have a zero electric field value between tw*:pk3h:/trxq 6lpj c,qdt d j0o positive charges along the kq d6 pjr:tjqxtp0/* ,3lhc:dline joining the two charges?

  Electric field lines near psitive point charguo 3y1y r32rqsb0)q d+p(wz jres

  The electric field shown,sic,rbuzd/ 0 ; 8qkap

  Can electric field lines intersect in fre qv:r,2tk :lbze space?

  A solid block of meti 8 fljgdg7-5omf27 x.mdae7vie* a; wal in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electr85*vm.loxdwid2eie a7m-f gajg7 7;fic field in the block's interior.

  If a solid metal sphere and a hollow metalfg0mk,bk) blshmb 1b f e,074j sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and , smfkeb)k4h0 0bg bl7jb,fm1the surface is

  A cubic block of aluminum rests on a wooden td2v,e+ 72jywx i b7dqhable in a region where a uniform electric field isewbd 2y7d7v,+ 2x jqhi directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an eiv vp ;jt1-pm4lectric charge

  A positive point charge is enclosed in a hollowyale mz,7 p,k7-s-bvskt0:vx metallic sphere that is grounded. As compared to the case without the hollow sphere, the el ,v-zv:y7k-ta 0pmse l bk,7sxectric field at a point directly above the hollow sphere has

State three properties of conductorslg z0;d*o8nz 2g :o9fr+q gcug in static equilibrium.

State Gauss's law.

  The charge carried by ono;v , mbi+ (.qjduae5ie electron is $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a p pa(zp:s8)k/rny z*g0s em0o net charge of +2.00 mC. How many more protons than electrons does npr8z0ogz(:0 / se mpp*k)ysathis piece of plastic have?

  What is the charge on 1 kg of pryeys( h dgm15u la*n vdrj9tn640-vq1otons?

  An atomic nucleus has a891/psrm g:g l ak:txe charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sep8.(s*ps j+i e1njj xa904kuf ujl fqp,arated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively.(juf980 4p l*n1p fs+jq es,jk iuaj.x What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a s.6qm69dagv pcz *w0gb econd charge, and the force between them is 1.0 N. Whb0 *w69m z.vgg qdpa6cat is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apartof 8gd/9f -usfdvs1m6 are they?

  The force between a pd.n+5t)zz5y u hl 1-a.jteqs$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm aparnu*; m a*3p+hbxiwr;vt, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electriax+*hn3vm *bwi; rp u;c force between them?

  Three identical point charges of 2.0svlkd74 4dg7p mC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the third l4 7gvp4 skdd7is 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 placed on the x-axis. A charge of +2.0 mC isq f8k/5.s.xrtkb8v3l .hfl v f placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at thklkf.8sf v5/.vlrb8x q.t3hf e 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 located at the following positions: Q1 = 2.00 mC at x exc6s)xs +cyh ;x)dm/= 1.00 m; Q2 = 3.00 mC at x = 0; )mhx;)c/cx+xes ysd 6 Q3 = -5.00 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 kwhfhwbdx+ lh,nj,/(4g ao ) :placed at the center of a square, 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. h(xjf4/,, ldwh ha:+wbk)ongWhat is the magnitude of the force 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 5p1 f 8rqrp)p.as2cdj = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (q 8ap5rfs .d2r1 jp)cp0, 0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, fpej)x*j3 t xnn:2w4p0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the npjepf42:j w )* 3ntxxnet force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verticesr:d8xw(qj, t c of an equilateral triangle which measures 8cq xd:,jtwr( 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated byj o y 3j.0tqa;tivtpfgsx3 ;9302hx iz 3.0 m. At what point, on a line between the two charges, would it be possible to pla0;htx.iaptjz3o2y 3jq; 390ti fgv xsce a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is s wi8;d6xy3 icat x = 4.0 m. Where on the x-axis can a thircs yw d6iix3;8d charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and c:k3bgvyxnb4u. t2aj 8harge -q is placed at x = 2a. Where can a third positive charge +q be plavj ntu2gy3kb8 . 4x:baced so that the force on it is zero?

  A copper penny has a mass of qukmbpk8tf55 f fmo+1t *4tf:3.0 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 forrfu7 ;pjqh5 m+nf /;tmce of gravity by the attraction of a fixed proton some distance above it. How faru+;qjn hmr f /;mtp57f above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduclauc-c2o 5s/or. ncf *ting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until thfac2*n/o 5 .c- crusole angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has aw9gzj7mbo y2/c ;/ gfq charge of +40e. What is the magnitude of the electric field at a distance of 1.0 mgcw 79j/ ;gfm/bq z2yo from the nucleus?

  What are the magnitude and direction of the ele s ,dkt)0n2crdctric field at a distance of 1.50 m fromkrn0, cd 2)dst a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test c (txc:hi6gse6w s9 p0eharge. What is the magnitude of the electric field at the location of tw06 6:tge(pshc9xe s ihe test charge?

  A 5.0-C charge is 10 m from a small test charge. cf30*h* (ejtfe 1ojdqWhat is the direction of the e1e*e(jhf ofdct0 3 *qjlectric field?

  A 5.0-C charge is 10 m from a small test cvtx/ub4)r t3p+ii ky( harge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thrbt 4v/kp3+ ui ix)y(te test charge?

  Two point charges each have a value of 3.0 C and are separated by a y yboiw+ w,xmu4v 3*o:distance of 4.0 m. What is the electric field at a point mw xuovmb,:o*+4 yiyw3idway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a metej/c2t lk8m8( l iq,diir stick and a -4.0 mC charge is placed at the 50 cm mark. What is the ele(mk/t8qdj28i lli ci, ctric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a met +dv,;p uv2a+ m0jeosaer stick and a -4.0 mC charge is placed at the 50 cm mark. At what p;a pe+v o 2jms0ua,+vdoint on a line joining the two charges is the electric field zero?

  Two point charges of-ztfd )-ffa(i(meci : +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway becf ed():(-ff- iitzmatween them?

  Three 3.0 mC charges ar9 7t(kx(cl, 9zlb ndgle at the three corners of a square of side 0.50 m. The last corner is l99t zxl, g(7bc(dlnkoccupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the con/blgs-rbkt/pr8) e bc0qnqf(2 2fc.rners of the sqn-cbksl pn qerq.tb /208c f/2)fgb (ruare 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 field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in sz05 iris 6ydnk0, hb,7jt8zba uniform electric field. What is the magnitude of t0 rdbb 5k ts0jy,8n7iizz, 6shhis electric field?

  A particle with a charge of 4.0 mC has a massg sj (+gd.f9xas cmv4, 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 0.120 g is placed in a; vbh /ddua;j+fxj,:e k0ubl ,n electric field of 6000 N/C pointing downward. What char , l0 hfbde,uak+:j;xd; ju/bvge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. Thep ,jo/x6 ;/hkrlyfr :bilja u)bn2n;3 ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the ma fl /ab3xy 6jh;rb/k unojr:n;lip ,2)gnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnit+fyl0mr hhq/4rs hg57ude of the electric field 5.0 cm from the sphere's surfahfqy5r /sm0hgl+4r7 h ce?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whabc)t3 ihnn /*tjdg(8;2p ytey t is the electric field 6.0 cm from the center ocn*yn3 yhd 8p/t et)btijg(;2f the sphere?