State the law of conservation o,l xfl +3kzv:lf electric charge.

  Is it possible for two negative charges to attract .y /+xec7piyaqtfv2 v .4jui-each other?

  Is it possible for a positive and a negativ lu1hi -1)zylbb u-87 dgo;bbve charge to attract each other?

  A glass rod is rubbed with a piece of sily+r(.waivh entym902 k. During the process the glass rod acquires a positive charg w(yt+h2en9.y rmaiv0 e and the silk

  A proton carries a

  The model of the atomxnvwbdih*++h8ai 5b . shows a

  A neutral atom always hasg,n0b7r xl)h /i/gp nr

  An atom has more electrons tha2bn:ut:r6n h5vj) bvqn protons. The atom is

  Materials in which the electrons are bound very tightly to the nne,wxz7r( v (vrjl))b uclei are referred l7 wzr)bxer(,v)jvn( to as

  Materials in which the electrons are bound very loosely to the nuclei and can m*2u4 6vjosp-w:ghrb5 f- lmieove about freely within the magswv* oe6b25- uf4m:l j-hirp terial are referred to as

  A negatively charged ror4i7s7.2xk mp fqj s/kzg41hq d is brought near one end of an uncharged metal bar. The end ofmqxhqp.grs zf/7k j2144k s i7 the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are pl6oy a. spao)u qj(t3t:aced near each other on an insulated(yu o)ttaap:6o sq .j3 table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively tz jiz1cw2d1l4q 5k4b)l 9:zks:6qzxu kj dw7charged rod charge an electroscope positively?

  An originally neutral electroscope is briefly thsxx(jlwz; fw*b- ) ms,z ,f-uouched with a positively charged glass rod. Tx-*uzj( b;h,-,) w wmfs sxlfzhe electroscope

  An originally neutral electroscope is grounded briefly while a posit gth)*u-zvs0vm aj x:h.6m mh:ively charged glass rod is held near it. After the glass rod is remov)6hjzv:st *g . :mvh0a-xmu hmed, the electroscope

  A positive object touches a neute;b 7/c r2tsjvral electroscope, and the leaves separate. Then a negative object is brought near the electro;st/ 7bvrcej 2scope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insule9lw.; yof/ruy6qdi cy - 4x;yai o,8lated table. A neutral metallic ball rolls straight toward the object, but stops before it oxifyl9 ;y.4/ r,oyaue68 l-d yqc w;itouches 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. 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 Coulo9 v1dz7uwb(a cw9t3h amb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanczu30,1zs . z;-n u.wqryijtlhe d. The first charge is larger in magnitude than the secnsq0uwri lzu-j 31 z,.h;y .ztond charge.

  Sphere A carries a net charge and sphere B is neutral. They arpuu,4j exs3k0 ;pb2xb e placed near each other on an insulated table. Which statement best desxx e 2;u,sb40upkb 3jpcribes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges on qgr (;-pxc dnbr4b//q both objects are doubled with no change in sepaqb4bdp n/ xgrc;/qr(-ration, the force between them

  Two charges are separated b */s nxqav0l7ay a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d*al qv/a70sxn/3, what are the new mutual forces?

  Two charged objects attract each other with a force Fopvkz)afq 9 )a-g4s*c . What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between f)*o )-ackazvgsq4 9 ptheir centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton ap a,g7xgw8x xpz0j8.wre separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second elec xxg.wzp,gwa7p8 0jx8tron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happew: sjmob(963yzaah1r ns to the magnitude of the force on the first electron if a second electron is placed next to the 3zrmhsja9 1:y aw(o6b proton?

  An electron and a proton are separated fgb vpzvgct 5/:s 7hyu75g0xi ky)0-iby a distance of 1.0 m. What happens to the size of the force on the proton if tg07cf-bxz 7 gky0u v/hgsv55 :i i)tpyhe electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the ced(g4iytplh-4 1e7z;qm; c 29yc/ugnmv ki3mw nter 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 squa;;ltdwn2g1cie4gz/ kp4u cvmm(yq-h 379 i ymre. 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 centroid of an equil w ,h,ji,vr/nzateral 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 magn,i, rwhzvjn/,itude 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 a vector m4lcxhr sd fy)51xu wj)-,ko 0(y/cxl?

  At twice the distance from a point charge, the strength of the electric fed-:r q/w pf:gr:5fu tield

  Is it possible to have a zero electric field value between a uce a axf0nkz0bi.+95negative and positive charge along the line joini.af5zu0x+ ca9 0ne bking the two charges?

  Is it possible to have-zy d9d.u*nu l qkch*.,qnfk- a zero electric field value between two positive charges along the line joining the two chardl.hu-q q u nc,kyf9d-.* *nkzges?

  Electric field lines near psitive poid4 a3qjg4jcc)nt charges

  The electric field so4rspq xrm ( cr4-dn,du(z06yhown

  Can electric field lines intersect in free spf3 b *hf+;pvu xlb)q*xace?

  A solid block of metal in elei*5q yohmv. u+s5u+x sctrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric +5s 5yqoxsi.u*hum v+field in the block's interior.

  If a solid metal sphere and a hollow mezgy;i ;i9e9iag 9gd uert 61i,tal sphere of equal diameters are each given the same charge, the electric field 9a,ugg i9ygeii;16t9re dz i; (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform536ms mep+)emgpdk 5c electric field is directed straight upward. What can be said concerning the charge on sde mmc+ep )5 k56pmg3the block's top surface?

  If a conductor is inh 2x fpzxx 4k*uj20zq sb/s-,i electrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a holm+ pmnq fj.-p)low metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point-m+qfm .pp)jn directly above the hollow sphere has

State three properties of conductors in stak6b3fmf /0up(qc a1pc) *w1tqe 5jt iftic equilibrium.

State Gauss's law.

  The charge carried by one elex.2:r7ay+5 gj udlly+wu5h xqctron 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 agd7pa3 + w d dor0.8ds9eo-qqa net charge of +2.00 mC. How many more protons than electrons does this pge7 p oaa9d 08rdqd3w .oqs-+diece of plastic have?

  What is the charge on 1 kg of/m1zyf0o sqwo avp:xu5s*99 i protons?

  An atomic nucleus has a charge of8c 29,jk( r- /alyr5mkvgmalt $+40e$. 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 and -4.0 lv44 o trmq40ku lnlw4+zg:, bmC, respectively. Whaq:+m 4tr4vllw4 4bz k0ugnol ,t is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betweensiy1 xdekw/tjj8t40yae u0/ 4 them is 1.0 N. What is te0 i/d4 wx84tejaj/ 10 tukysyhe magnitude of the second charge?

  Two 1.0-C charges have a force between thezb9nw9*hhf8l q 09opn7z l/kbm of 1.0 N. How far apart are they?

  The force between a q3g c m.syd(3w$30 \; mC$ 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.()k lfv5,uwc2 qcd4pf If they are moved to a new separation of 8.0 cm, what is the electric force between them vfqf, ducwl5(4) kcp2?

  Three identical point charges of 2.0 mC are placed on the x-axis. ioc v 51u:vv/zp z4lb- The first charge is at the origin, the second to 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 chvcp1l/i4uz: b zov-v 5arge at the origin?

  Three point charges are placed on the x-axis. A xl6t6 g+ dq0v3ab1zg-li mbq5 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 magn qlx5qbb+a6z tdg0g3i-v6 ml1itude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positoy n5 s*7cop/uions: Q1 = 2.00 mC at x = 1.00 /pc5u *7oyons m; Q2 = 3.00 mC at x = 0; 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 placed at the center of a square, and a),cr)0e2taq a65z ntcb.gbf e 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 force that acts on the cen) b6e5rta zcf.2)a q,t n0gebcter charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30r:v3jjid,m)hug 4s 7x, v alz*hj2y.n m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of th a,g2m,ihszx 7 dr.j uh*lv)nv43y j:je 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 = 5.0 +hbxkxr . 0xd f2:n*denC is at (0, 0). What i rn:b+2fx 0hdek .x*dxs the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are p-etdsg d58u0- rjxa1 ulaced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one or-uau s5xdtj d-18ge 0f the charges?

  Consider point charges of +Q a(* jp-sa5efq2a7wjc 4z lm w0mnd +4Q, which are separated by 3.0 m. At what point, oesm w amc0-jqfw7j5*l( 24z pan a line 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 the origin and a +9.0-C charge is at x = 4.0 m. kt) 85i(.aakda rv db zwqtz)+z98sk/2yi js*Where on the x-axis can a third charge be placed so the net force on it tb .z ik)yiks8wa2j *d/zz(v a )a9+kqsrd t85is zero?

  Charge +2q is placed at the origin and charge -q is place a:p2pfvg 10xyd at x = 2a. Where can a third positive charge +q be placed so that the force on i a y:20pxp1gfvt is zero?

  A copper penny has a mass of 3.0 g. * hncl2m)6tvs 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 attrac-,r*b o hbfk x/m zygyk2j3f21tion of a fixed proton some distance above it. How fxmy/z r2 ,- *kh3fbk gofjy21bar above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common pointscx53vezg0 u p+- prd5h+yw9r by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces themp wp-rd+y50xegczh9 +u3r vs5 apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e.z -kvs+zb 4-cv What is the magnitude of the electric field at a distance of 1.0 m from the nucleusb-vzk4s vz-+c?

  What are the magnitude and direction of m o; mp/k+cx;vf0hg a(the electric field at a distance of 1.50 m from a 50.0-nC ;;vm 0hoc/f kmg( px+acharge?

  A 5.0-C charge is 10 m from a small test charge. What is thi-oczrr o do .h,k2q/65ch1ove magnitude of the electric field at the location ofcrhzhkovrdo - 6i, .cq 52/oo1 the test charge?

  A 5.0-C charge is 10 m from a small test charge. What eit 4usysn7*gj2 j ;2sis the direction of the electric f s7t;gujji e ys2s4*2nield?

  A 5.0-C charge is 10 m from a small test charge. What is the may e2 yo88baku3gnitude of the force expereuk 28yyb8a3o ienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each fia88el-i n 1wz3k 1zthave a value of 3.0 C and are separated by a distance of 4.0 m. What is the elnf1zlik3wae1 i88zt - ectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mar k ,i5xumlyn4,k of a meter stick and a -4.0 mC charge is placed at the,n4 mk,il5xuy 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is pla (ubx +tbh.i3sced at the 0 cm 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 is the electric field zero? (uixb h3+.tbs

  Two point charges of +3.0 mC and -7.0 mC 1h yx ha,m)8skltia pqt *0au;m*0u1oare placed at x = 0 and x = 0.20 m. What is the magnitude oftu*8k hmat1a,hy *x suoi;00a lqp1)m the electric field at the point midway between them?

  Three 3.0 mC charges are at 7pfutqv8yvgp1 8( )ij the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fv g8(7)yv8ti1 fpqjpu ind the electric field at the center of the square.

  Consider a square whh9ejxruk+i(x4 u+ k 2*pf svk(ich is 1.0 m on a side. Charges are placed at the corners 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(p4+*2(xsvfu9u+xkh ie r jkk, 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 a uniform elect/ 6tp(f5 wr h:fjvd5oegvw i7 uj3+bn9ric field. What is the magnitude of this 6fdbh:v3uvw5j7nj 5 fe+rit9 pwo(g/electric field?

  A particle with a charger2dm fx6+p)dnsbmlp4s9; lmpa ,3b 4clky;1 n of 4.0 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 0.120 g is placed in an electric fielmxl:tf 0t +)zan *xq*vd of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspended?tat x )qv+f0*nml zx*:

  A foam ball of mass 0.150 g carries a charge of -k:sjem( o3aca u6-;y-mie *uc 2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude a3m:e;k u- -(ma *o c6yesjuciand direction of the electric field?

  A metal sphere of radius 10ak/kjy: v :v2e nfg2/s cm carries a charge of +2.0 mC. What is the magnitude of the elf://jg k:yvn 22aske vectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrien q33,jfbcvu9-jzo hm3+bp(*iu b/ k ds a charge of 3.0 mC. What is the electric field 6.mq ,*/(h- 9obb3jpkzc dfb 3 ijnu3v+u0 cm from the center of the sphere?