State the law of conservation of electric charuu b/a3 .10zyrgfxa mc -zv5o8ge.

  Is it possible for two negative charges to attract each otherb- k eb1f0ugfa9e4 aed nb;3:u?

  Is it possible for a positive and a negativ h- /rih)w/*df c4mo io;4dziue charge to attract each other?

  A glass rod is rubbedc0qnoar it8e0 hdqp d.+5:bb 2 with a piece of silk. During the process the glass rod acquires a positive charge and the silkrp t:q ne0bh02q id5d8o ba+c.

  A proton carries a

  The model of the atom shows ap 9gaepj:)q9 x+v; xu.jhp6dh

  A neutral atom alway(1t)*b+ne 6 oloi hduls has

  An atom has more electrons than protons. Th718z nl c/ t;mxlk ++bb5lwniae atom is

  Materials in which the electrons are bound very tightly tvk8h w 6affeft9 h2*4vo the nuclei are referrvfwkef6 84 *vfhat9h 2ed to as

  Materials in which the electrons are bounx px4wcu ),fy8d very loosely to the nuclei and can move about freely witx )4xc,p8fywu hin the material are referred to as

  A negatively charged rod is brought near one end of an uncharged meguw s64,ncci:tal bar. The end of the metal bar farthest from6:i,scun g4c w the charged rod will be charged

  Sphere A carries a net positive cha49sk3.b -7,qiq;s jt ei*kb) srmfnferge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is corrb ist7s *3jke-s m k rqb;4i9f).fe,qnect?

  How can a negatively charged rod charge an electro:ij tww (p,q+mscope positively?

  An originally neutral electroscope is briefly touched with a positivj *i*fexv k +fg pw);9dx1vjm6ely charged glass 61dvxv*xi)m gfj;e9+ jwf k p*rod. The electroscope

  An originally neutral electroscope is grounded briefly while/j /emrqcj:1 g a positively charged glass rod is held near it. After the glass rod is removed, the ele 1cgq/jm rj/:ectroscope

  A positive object touches a neu/fuzf1s5r m 3ptral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but doess/f zum1f 5p3r not touch it. What happens to the leaves?

  A large negatively charged object is placed on an86zykx ce : yva2m4tj8;iyw3f insulated table. A neutral metallic ball rolls straight toward the object, but stopz3ac6yyjefvi;8mktx24 y w8:s 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. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units o7yttl8 aw dh(8f the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The 73 n4t q5t j(hlzhu5r6ld)rrsfirst charge is larger in magnitude than the second chu5( )t 54nr7dh hql3r6l rzsjtarge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nsikm43yd,58x; pa 2lv f5iuku ear each other on an insulated table. Which statement best describes the electrosmv uixs3lkd25yi48,5fau pk ; tatic force between them?

  Two charged objects attract aj+l2ujyovf3 +cuo8kb2: z2o each other with a certain force. If the charges on both objects are doubled withoukj8+l fv3yuc2a :bo jo 2z+2 no change in separation, the force between them

  Two charges are separated by a distance d and exert mutuavbwu975 jx(cc y .gpf7l attractive forces of F on each other. If the j7p .g5w xf7b9 (cvcyucharges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to thcxy2gv/kt *v 1e force between them if one charge is doubled, the other charge is tripled, and the separation distance between their ccxtgy1/v * kv2enters is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sephnf(h9 yfqb6x2q d-b /arated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is pl hbn(fxhf-/b6 qd2qy9aced next to the first electron?

  An electron and a proton are separated by a distao4brv 5mt o6:/ y4dmf w,f8doance of 1.0 m. What happens to the ma8 ydombmfoo w4r6td5,v 4/fa: gnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are sept-,hr7 d9 . gmck dus o-gp2tiss5./dharated by a distance of 1.0 m. What happens to the size of the force on the proton if the oc. h s tugrh2s/tmkp7idg5 -d,.s-d9electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second point dpb 1 hw6.(d3o tmse1dmb fj:. af/vd)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 thsd:6b1fvmhddfao pjemw) b( .t /13d.e magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed a3)raqc rl1cp-t the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's 3al1cr pcr-q) vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude 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 notvk-cqbm ). v6 n4v2ukl;sjh 1b a vector?

  At twice the distance from a point charge, the strength of t3y51)ivz 3u degs0 l) ic.vyckhe electric field

  Is it possible to have a zero electric fieldv25t07mkiuayiu7pc rpcv q 868 gj(g- value between a negative and positive charge along the line joininr62v 0g8 pk8jq7a(yu-mt c7 ipg iu5cvg the two charges?

  Is it possible to have ,w.-assc* zyb3tyhe gq15cu ;l lpq21a zero electric field value between two positive charges along th,wz csh5uq3.gb1la 2 p-e*yt1qs ; ylce line joining the two charges?

  Electric field lines near p1uec4s( 7w(b:ni7ca z ws r)hksitive point charges

  The electric field showno8bvmnv9tvl1a+ 5,;gs 5o bpb

  Can electric field lines in9oux*re y n08btersect in free space?

  A solid block of metal in electrostatic equilibyc1w( udoa1y 3pz8dz( rium is placed in a uniform electric field. Give a statement concerning dcdao8 1y(w1u zzy3p (the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters a )kgayca cj7 ve:me,/9 2sedp1re each given the same charge, the electric field (E 7d2e/1aka9) esgc:vmep jc, y) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a re+hra/b(uyl)r gion where a uniform electric field is directed straight uparhl) +(u /yrbward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic98rwm/a rx t u6uwpmb-a(2y, v equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that ts :(wo0d wi-. fu8crxis grounded. As compared to the case without the hollo:0rdw8.o -fsw i xtc(uw sphere, the electric field at a point directly above the hollow sphere has

State three properties drw 5 o6i9sxvdy8yf)pp2 -+jsof conductors in static equilibrium.

State Gauss's law.

  The charge carried by ow5ip e4if*nu l)6p r4ane 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 net charge of +2.00 mC. How many more protons thanffse3.7wvho o 4 yy-)u electrons does this piece h4ef.wov y ou-3f7)sy of plastic have?

  What is the charge on kauxx .ssetg:8 ,(s)t 1 kg of protons?

  An atomic nucleus has a chargk1e4d j. rqtu 7 nl+mi55alh7+lex7fi e 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 and -4.00( 4impkp8s0oxf3v wk mC, respectively. What is the magnitude of the electric forc3fps w0084mo(k ikvpxe between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwee9u 5ozc4)px ozer :lcsk g0e rf18oh46n them is 1.0 N. What0gkr1 z6z) x prl 8h:oo4c45s9efceuo is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How faje:*shh4y jr/s8 8 tgdk:vtl6 r apart are they?

  The force between a q05ty/sj eg 4n$30 \; mC$ 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 fo 1 *v.cp:d-krb3tfbkbn8fh a0 q 1xr3lrce. If they are moved to a new separation of 8.0 cma* f n qkv1hbb1k8x:3 pbtfcrr03l. d-, what is the electric force between them?

  Three identical point charges of 2.0 mC are fv h++w,htod: w)h wj.c 8q.qmplaced on the x-axis. The first charge is at the origin, the second to the right at x = .w)hcfq+q8tj vd .whw: +o,mh50 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 placed on the x-axis. A charge of +2.0 mC is placed )d36 3rw +au/gh bummllw,cp-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 electr,l-a /wpm+mwgl db3 u)ur 3hc6ostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at xd5z mokcun0ytopje,2:n5; cij6b ) d2 = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mCb5i m2ded6p2:,j) o onu ;n cjt05cykz 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, al lmx /9cji0t7nd a second point charge of -Q is placed at the upper-left corner. It is observed that an electrcmxt0j 7/i 9llostatic force of 2.0 N acts on the positive charge at the center. What 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 = i2jact+*6wf.to a 0u i-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is uf 0tt*c 6oi.a jia2w+the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 z wa-e9l m+;6tpoenfe)t.em8 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on .-t+89a fpmlentm wee ze)6o;the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at f l-8 kw vk67n.z le0*cy: w)qm0aarpmthe vertices of an equilateral triangle which measures 30 cm on a 7)ky f6w*:ve-ampraw0.llnzm c qk 08side. 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 separatm m(pc99c7 chbk5 ;c o5djjm,ied by 3.0 m. At what point, on a line between the two charges, would it be possible to place a char dp5cb9icjj;h9m kmc(5oc, m7ge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin a2 h v7dynsf8;tnd a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so v;hts 2 dfyn78the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherek e4xj:gmb(x- can a thir(xgb e- kj4xm:d positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g pr9bhg97txi o dp387e. 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 7eo..xdvko2 d up against the force of gravity by the attraction of a fixed proton2.vd x k.7odoe some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting tdfwv b,je6kvb)/0 x;dhreads which are 30 cm long. Both are given identical charges, and the electrostatic re6/xjvdkb f);b0,ew dvpulsion forces them 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. What is the magnitude ua* b02e 6uptaof the electric field at a distance of 1.0 m from the n t0 pubae6au*2ucleus?

  What are the magnitude and direction of the electric field at a distanceac4 l0;) 6-bzegoqdfj of 1.50 m gca4 je)6zo b;qld-0ffrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnq2m 3a pf6ffr0itude of the electric field at the location of the test cha0qff 3rafp 26mrge?

  A 5.0-C charge is 10 m from a.42,s*;o3dspfveyi + iikz hb small test charge. What is the direction of the elh,v*sfise2kb.i 4p;i yz 3d+oectric field?

  A 5.0-C charge is 10 m from a sch.po1 ch)8cw6a-sin mall test charge. What is the magnitude of the force experienced bo6cpcsw 1c-hi nh8.a )y a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a 7bjy bwqmf-3y *b1:mndistance of 4.0 m. What nj:-7byfm* y3bqmb1wis the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the9loucs (f15f d/rq5tp 0 cm mark of a meter stick and a -4.0 mC charge is pupqrdof( c l59/5s1 tflaced at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter p ./z8s /lqsairuxr6s6 t8b e ou0kl-6hqkn28 stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joi kr s0lok/p.i86 86qh62zsuut/-xaen sqlr8bning the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7mh j6 z iwyng7ac46l tf 3+n(7oq+kh0s.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the e +hms+ht4y(n fz njal 3 q77gi6ckw0o6lectric field at the point midway between them?

  Three 3.0 mC charges are at the three corg/g0* 0 ysvx5fopgev 9ners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electripvsv0x9*g0g 5eg/y foc field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cos dc/2p0; lg1l980s;m(epcxl dr co merners of theegp;8c;l(0e0 l9lor sxds2/ 1cd pmc m 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 field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC whewt .we* ))lfzzn it is placed in a uniform electric field. What is the magnitude of this electr*zw lz) fwt.e)ic field?

  A particle with a charge of 4.0 mp*. ldkng v-,id)v5klC 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 plz8r3l4p0d h0r wi (kxkkz h7hi hl;m1yv+es1;aced in an electric field of 6000 N/C pointing doe v4s iil1hpk7rk(r8;+;z0 h3z wyhl0m x1dkh wnward. What charge 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. The ball is vygx2veo44/gplaced inside a uniform electric field, and is suspended agains /x2g4g vo4eyvt the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius qqq761f ls.jry+y;o dz x7co .10 cm carries a charge of +2.0 mC. What is the magnitude o+zf;7 1r sxd6ql.oqcoqjy7y.f the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whah s oal:g:gf-j2s* b,pst2+ zat is the electric field 6.0 cm from the center of sth2sg:lpjo, b: - fg+ sa2a*zthe sphere?