State the law of conservation o73+i hjefp5fmnng. 7x f electric charge.

  Is it possible for two negative charges to at3* nga 6 zdmtvfl2r-e3tract each other?

  Is it possible for a positive and ;s4owmd-5jpxek (z( w a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the prokopdsc 5-i,- jcess the glass rod acquires a positive charge and tdkps,5j - -ciohe silk

  A proton carries a

  The model of the atom sho-5hs +qld -s-dce- sq-vqpii 7+sonp4 ws a

  A neutral atom always hasru ;1lu2frosgvr);;q

  An atom has more elechym,z:s ong 5:trons than protons. The atom is

  Materials in which the electrons are bwujf 4m)) mrpsx/y46s*kvcj6ound very tightly to the nuclei are referred to ascp jv 4 *)66x/umj w)skfs4myr

  Materials in which the electrons are39zz/vit8y f lfg1tv . bound very loosely to the nuclei and can move about freely within the material are referred to zt. yivlvzg1/t f8 f39as

  A negatively charged rod is brought near one end of an uncharged metal bamdn bo)() ns/k3i- kplr. The end of the metal bar farthest from the cn ln-k)/ksio3)mp( dbharged rod will be charged

  Sphere A carries a net positive charge, andsi 2 )uq d4:j/(rbauud sphere B is neutral. They are placed near each other on an insulated table. Sphere4drj/ubui( dau s:2)q B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rodory j*z2la.3( i crm/j charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively acuc7jlov54 i:bjc5-charged glasso 5 c 4blc5jiacu-jv7: rod. The electroscope

  An originally neutral electroscope is grounded briefly whiljz0rzd7. jl 2v;ipja)e a positively charged glass rod is held near it. After the gl .d2 7v)pz 0zj;ajlirjass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leavespw;):6d e h0b tpzry2bk ,n5by separate. Then a negative object is brought nbn5 ez6, y ) bby2wr:pk0;htpdear the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is place 8a7fxbgs9lmw89a, fl d on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball r9s,lbfm afa8 w79gl8x olls 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 C2mw.e 8m*oi3e+qa znloulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distandr,t gbzd;.wo;n3n k8ce d. The first charge is larger in magnitu;zn gr o.kt ,nb8dw;d3de than the second charge.

  Sphere A carries a net charge and sphere B is neutral.gs b) 93t8 vd doffb+;om*f0mo They are placed near each other on an insulated table. Which statement +ogfbm;ftm3s8 odv* )0bo d9fbest describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chz* 6o*xm9 wljdarges on both objects are doubled with no change in sepaomz 96jd*lw* xration, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces offk a/wm( 4qr0cox .sh6 F on each other. If the charges are separated by a distance of d/3, what are the new f6 q(s x0awk4 .mcho/rmutual forces?

  Two charged objects attract each other with a force Ftyrn63yhzt/k 1t ;0hi . 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 one-fourth ikh6r0;1y i/ n3ttthz yts original value? The force is now equal to

  An electron and a proton are separated by a distancx,*xsb*w d0rscb(zl 0;v-lff4nzcp/ 7jpq -ce of 1.0 m. What happens to the magnitude of the for nf7p,xwjl 4 ( lzrqc* /bx0bdcfpzc;-sv*s 0-ce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance *t1 m(yf pu;z ew 2pt)u+djd:rof 1.0 m. What happens to the magnitude of the force on the first electro2 dt* e:1tu;zypdm(pr+ wu f)jn if a second electron is placed next to the proton?

  An electron and a proton are sexb3uka0j 0 2qyparated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is jqx2aub3 0k0y moved 0.50 m closer to the proton?

  A point charge of +Qr i;fm +wap wx;(nvb7e627crv is placed at 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 elvpnwm e+r7;2(avb;rx7c 6i w fectrostatic 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 force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of aslid/n9 f,ip5ib86nx bm )ay :n 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 magnitude of the force that acts on the center charge due to a third charge of +Q placed at onb8ny: nlbp5dmi iaix/s) ,f69e of the other vertices?

  Which of the following is not a vf .zx1w7n pl(aector?

  At twice the distance from a point charge, the strength os g+ 5 ;; hybzxio6.tj7)xpi/ji tyx5xf the electric field

  Is it possible to have a zero euipi.9xciv,fa2 rhu5i8+k gsh2f72 slectric field value between a negative and positive charge along the f+ira8 9,v iupf2 s5uigsihx2.kc27h line joining the two charges?

  Is it possible to have a zero electric field value between two positive char3zjwf:e*+mji3ze :z t+nql.c ges aloee.mnzt z+j zj+:3w3* cq :iflng the line joining the two charges?

  Electric field lines near psitive point chargesk+yhkce;ni+l b5 m+ d1

  The electric field shyym 0y2*p e;+wkdug)(wt, 3 p 8vwybjcown

  Can electric field lines intersect in frr4w (croak,cm81 bsw6ee space?

  A solid block of metal in wpahfuntp(lf1jg. -ek,7 8 ces3j0l *electrostatic equilibrium is placed in a uniform electric field. Give a statement cpk. p,uj3 gslwjfath fec8 7ne01l*(-oncerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diav t7jin*v;(gp,x7v mnryp3 -h meters are each given the samjhtnr- vx vnpi(p;37mg*, v 7ye charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a reg;cw uexrptp7(t c8c03l 53y dnion where a uniform electric field is directed straight upward. What can be said concernin 3pccty3( pxn w850rt7dcul;eg the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric cha2 y/-hctkqi)q/, e: 9 bah;ia w4fd 9hliyu7skrge

  A positive point charge is enclosed inxlcxsz+k7mm 8;u y6* l a hollow metallic sphere that is grounded. As compared to the case with;ulxs8 c*yz+m7kml6x out the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in sb ;*m9enu5jmbr ux)m8 y,b-ls .uc+ 19wzkuxstatic equilibrium.

State Gauss's law.

  The charge carried bx0bz6*d/ n:.7 e a5o z6gaxt dirjgb3wy one 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 3s; y1wvwo gdgw+)xofx9f c-(mC. How many more protons than electrons does this piece of plastic ha3v 1wfx(do9s co+wggyx-w)f ;ve?

  What is the charge on 1 kgfq 7wa7s +o1bh of protons?

  An atomic nucleus has a charge o*wqf .q*zu6 .oo/ci np4qks0yf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cmkjno9ii 5.k.oian( 0d1uemqw/ 2r rrkfrq2:. , have charge values of 2.0 and -4.0 mC, respectively. What is tr.d5qq: 0.9mr ejn2iror i.kkwok u2naf(1i/he magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwen0bkjny7)p s4hf/ k2uen them is 1.0 N. What is the magnitude of the seconb40j )y/hus72nkf k pnd charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far aparu*kj+to7d0rl 3opz u; :q3ttpt are they?

  The force between a ;yuqr3w3f6 k55qpot z8b6kgd$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experiy.2a/loddlyl8v 1.b n ence a 1.0-N force. If they are moved to a new .vd./l obn ll 1ay8d2yseparation of 8.0 cm, what is the electric force between them?

  Three identical poina-fe k2lmjn(). k ;c / cm+e(dp+srlfrt charges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the right at x = rd cck( fks+pmfj(lnar.lm2 ;e +-) e/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 placed on the x-axis. A charge of +2.0 mC is placed a. r*-pkqhr4k7dhn t4gw+k. fx t 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+hwx4 k4pt* fd.7- nkqhrgr .k on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mCzd9,7l : g6axwvt putqb3oe ,ubar)87p0u6yx at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnit67uvr utp b793w 8x:a,o0 uy,pbgex zq6da)t lude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the m 48*bq+x9sf vjeslm 8t5b. 0ell8hefcenter 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 efe8mbml *9l8sfhl54xb8.s q e +jvt 0at 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 = -1.0 nC is5 p4,jrem 8 /bbo.nsyi at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charinbr,s4 /yeo j p58.mbge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.1 -+wy0 1wifin ,8yuubbhrexy 1vn+4k90 m); Q3 = 5.0 nC is at (0, 0). What is the direction of0+nk4w u9 ynu,e vb1hy- f+1xibyw r8i the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are pl* e2 gpq/8; by ;ekc62fzmwcilaced 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 ofe6;q8/ c mgp zfc*2leby; 2ikw the charges?

  Consider point charges of +Q and +4Q, whivuvt p4:f 8wc;p- fds2ch are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q suc;2ds v4:ucp8 ptwffv -h that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chargej+/ lw3 t: t 2z:ibyy46jdyomw is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on ij6y3yy o zi/m:bj 4d+:tw2twlt is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2n2j0)1*(xjg bee 0 9en .uqzlvnr7t rtkt 8(xaa. Where can a third positive charge +q be placed so that th8 z) tr abe((jnge091.nujnl*tex7q vktr2 0xe force on it is zero?

  A copper penny has a mass of 3.0 g. A total ae z85kw9(x8 c9,jtrtbyivx.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 gravi+4pahxq5x u 47ntj h .wzql+7hty by the attraction of a fixed proton some distance above it. How far above the electron is thxtn 4hujwz 4h75qpaxq.+l+h7e proton?

  Two 0.20-g metal spheres are hung from a common point by noncondn9qfnb+) rh1b mf+jq; ucting threads which are 30 cm long. Bb9 n )nr;h bq+mfq+j1foth are given identical charges, and the electrostatic repulsion 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 of the electric ssrpw(r ;/7wafield at a distance of 1.0 m from t(;p r7 wwasr/she nucleus?

  What are the magnitude and direction of the electric field at a distm7v84nl2l j g* 3mps*4nl3kzihqu tj:ance of 1.50 m frov8 ul 2:*3ql*p ml 7ks 3mnihgj44tjznm a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chargep.rg k,z gn2s eetu:lr --47av. What is the magnitude of the elect7-tgprrlue.a: 4s gez-n kv2,ric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of 8z y*oybslfv dlh(5:9 the elect(y shdz:vy8l 9 lofb5*ric field?

  A 5.0-C charge is 10 m from :z gjhuvk(* 7aa small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the tvz u:g*7 a(hkjest charge?

  Two point charges each have a value of 3.0 C and are separated by a dist.4klbvfi- ;cnance of 4.0 m. What is the electric field at a point midway betwc; b-lnk. if4veen the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a kwdd2g3p 0on *meter stick and a -4.0 mC charge is placed at the 52p dgk 0w*dn3o0 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is p c*uuz: c;(pwqlaced 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 electricwu: cc* z(;pqu field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = vw)wub6e2 h.x 0 and x = 0.20 m. What is the magnitude of the electric fielduweh.xw 2bv6 ) at the point midway between them?

  Three 3.0 mC charges are at tw *uq*yr78,jqy0j w syhe three corners of a square of side 0.50 m. The last corner is occupied by *jw,w*yyqjs0u7qr 8 y 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 corn7 -p4i(msj*uu3ddv6s 6 d,s m 50ok wfly*yvpeers of the square as follows: +4.0 mC askveyw 0 duv*mm6pj*,o-if 5 yl73 d64spsu(d t (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 c;x2bj5 6z, jsm6ozb4-ltp kkwhen it is placed in a uniform electric field. Whato bkt5 -x4zj,cbj2k66; p mszl is the magnitude of this electric field?

  A particle with a charge of 4.0 mC h:m.lmbd0n . gias 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 plac;mc3c2kadv s )ed in an electric field of 6000 N/C pointing downward. What charge must be placed on th2c)ma kvdcs;3e ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 ndurgy,bpfp 3s-,(x( nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and dire-py rbfus,3 gp(dn(x,ction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +21 p3 f/) mq pyt:ci0-amf1llmy.0 mC. What is the magnitude of t110- /ppf t: i) 3lmmmqfalcyyhe 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. Whatphgw o/8in 9t.*s 7sncn1zo+o is the electric field 6.0 cm from the center1+s9h o/zn p.n os*cig8ton w7 of the sphere?