State the law of conserv: cfuy qw+y6g4ation of electric charge.

  Is it possible for two negative charges to attra0u 4 dlr;zseb(ct each other?

  Is it possible for a positive and aax gsq)9,k z7n negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. af 6o q4xnt38 ;jez9dekl9w k0mog,w2During the process the glass rod acquires a positnag,fokjl20kw wtd e m34 o69;9xq8ezive charge and the silk

  A proton carries a

  The model of the atom sreb/pui(ot 0.c8k3;j dt p qt2hows a

  A neutral atom always has.;n-b.au0-f jo nv8kp 9lrcpt

  An atom has more electrons than protons. The atom iqk kvch;wt: ) ,4u,dils

  Materials in which the2x ;ckzaw/+2b pkml vxhw ew ht0;m1p)9,tcq3 electrons are bound very tightly to the nuclei are referred to 2xch ekha1;p+p wwl/wcv2q3)m,k m9x tzb0t; as

  Materials in which the electrons are bound very loosely d t1v/fe0mct*(jjk,7m7w t kwto the nuclei and can move about freely wdj1tj,*kwm0tm(w vc e/t 7fk7ithin the material are referred to as

  A negatively charged rod is brought nearplwk 2:22b5co jrny /y one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be chy o2 bjn rp2ck5:w/l2yarged

  Sphere A carries a net positive charg0 n 20 p 1shvxi:tkxd47galb-ge, 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 grou4g:tibx7pk02h 1 ag nd-lvx0snded. Which statement is correct?

  How can a negatively charged rouh a4 5lnjotvj8x2)f 7d charge an electroscope positively?

  An originally neutral electroscope is briefly tou-c4st*laalv+ ched with a positively charged glas*vta -+sc4 llas rod. The electroscope

  An originally neutral electroscope is grounded b o-p wf)82zdmhriefly while a positively charged glass rod is held near-ow2pdm) f8hz it. After the glass rod is removed, the electroscope

  A positive object touches a neutral elec8vxwdfrl o .-,troscope, and the leaves separate. Then a negatio.v lwr8x-d f,ve object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object iu-ty j6f m.abf g5m5)es placed on 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 th fgm6a.5 u jey-5ftbm)e 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 constan rh/+1una+k o /g*p)qv+ay(uvnjie ; et $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d0v dmzi7e(n s.. The first charge is larger in magnitude than the vndm( 0.s i7ezsecond charge.

  Sphere A carries a net charge and sphere 1orfvcapgn7fj4r 7)jlr 0p85B is neutral. They are placed near each other on an7c pf)rlfoajvn7jr 0g 5r481 p insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a 1 m1o tf 5hzd5udklelu8* a 6xm6.vvn4certain force. If the charges on 8km fmhu6 a 5vd4xlo6lve*dn1 utz5 1.both objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance deas/(,d q5pry 0zb,rs2dnr .x and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are ya,./ed( 2n0 rp ,xrdsbzs5 qrthe new mutual forces?

  Two charged objects attract each other with a force F. What happens toc893ehi0+9ihei hm ra the force between them if one charge is doubled, the other charge is tripl +ihi 0cie39hh8rm9a eed, 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 are separated by a distance of 1.t3eyg*9k* szp 0 m. What happens to the magnitude of the force on the proton if a second electron is ey* 3k9zp*sgt placed next to the first electron?

  An electron and a proton are separate/dmfnwt7bhg ) 2)ne,zd by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed nextn wdgm7z,be t)fn /2)h to the proton?

  An electron and a proton are separatsyra.w8za+2p*us sz)*vvz96o /qi b med by a distance of 1.0 m. What happens to the size of the forcs m9v.2s*) izquyb/ps*8z+vw 6a oaz re on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Qahb 3u.7dsn.j ; n2qce is placed at the center of a square. When a second point charge of -Q is placed at one of the square's coru2j.a. d ehc7sn; b3qnners, 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 force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the+iub w)s2sg.k centroid of an equilateral triangle. When a wb2.)gs+ikussecond 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 one of the other vertices?

  Which of the following is not a vectosdaab .xeb+iuf/o-+9n* wkw8 wy ;ng.r?

  At twice the distance from a point charge, the strtxo vyk) 1gyt3l+k, p0ength of the electric field

  Is it possible to have a zero ele/sck u2q2/qft bx1,u kctric field value between a negative and positive charge alon uqsuq/fcxtbkk122, /g the line joining the two charges?

  Is it possible to have a zero electric field value between two positive charg t i5m.vpxlk/6b)mx)w7sea 2s es along the line joining the two charges?xve.tkx /l57m2map )6w )s ibs

  Electric field lines near 24 sqgro6shk;psitive point charges

  The electric field shown :lb)xx idkn .rgp;:+v3yes )m

  Can electric field lines intersect in free snwwt+v mhpu4 i9. n9 gct0+4akpace?

  A solid block of metal in electrostatic eq/ tph)2 e.udzouilibrium is placed in a uniform electric field. Give ao2d) huz/ep.t statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each g0 y9 n,-y6vsxj /ddztlbj 4t.kiven the same charge, the electric field (E) midway betwee zy,lx4d9 b dj 6sjykn0-vtt/.n the center and the surface is

  A cubic block of aluminum rests on a wooden tab74*c uuwy flm:le in a region where a uniform electric field is directed straight upward. What can be said concerning thefcl :mu u4yw7* charge on the block's top surface?

  If a conductor is in electro h6 -cvd d47tjtipdy-+static equilibrium near an electric charge

  A positive point charge is enclosed in a hollowwjra rm iin4 a;*w)7rd5 qo.q. metallic sphere that is grounded. As compared to the case without the rmwj;ai .w75)arq *ornq d.i4hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibgi 0 mmg*d4g yki4 l8hlfa g6f,zqm)62rium.

State Gauss's law.

  The charge carried by one i8ppva j2j5.3ks3m8.wj ncf 3 acv9adelectron 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 ha tvihu5g*x s26yl0 ,tgs a net charge of +2.00 mC. How many more protons than electron5vstglx u0t*62 ygh i,s does this piece of plastic have?

  What is the charge on 1 kg of protoiivr3bc y;df)or6q(a2g0 : qmh:;ag ib4gwm,ns?

  An atomic nucleus hasmk. u52fkl 3nq;y c)+zj0un wi a charge 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, havs3qq. tpi4p6 z(l+bsx r9: whoe charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwsb:oz. p(ql+tiw6 4 r93xpq sheen them?

  A 1.0-C charge is 15 m from a se9ic 8 00xk )uq0 .fu,-l7nkn ereflvgecond charge, and the force between them is 1.0 N. What is i ukf-enkne0xl0r )87el . c g9quv,0fthe magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are tcyn uq7 ;ek,z.,e. vguhey?

  The force between a c091 q/cklf-upzbvepul rlp)(b :+/+v b/ yu w$30 \; mC$ 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. If they x3x(ydlvv s6iri9v8 faz7c80m**rb kh3jpy*are movy h*rkiv*x (zaj 9mvs 0vp*x3fb3rdy6i7cl88 ed to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC l+ gi szp99gpx-ot.k7are placed on the x-axis. 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 thi7oz9+9sltg -px pk g.e magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges arehmh+. zzzi8ecv29xjmqp4r5hmf (2( n 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 the4nf z 9ih(+z5evmzqh2(rc2 j.m8mp xh 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: Q1y2 uu-j z)iqur ,i6d2twern,; = 2.00 mC at x = 1.00 m; Q2y2)u d,6tu nweiquj-iz2 , ;rr = 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 uwp- 3jcc;u9q 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 centerpccwjq93-; uu . 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 is at (0, 0.10 cf3 v,8)t*arrz 9fjekm); Q3 = 5.0 nC is atz,a 8ft ejcfr k)r39*v (0, 0). What is 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); Q0lix:zl-t4 n- p l:roz3 = 5.0 nC is at (0, 0). What is the direc0 nt- :olzzp r-x:l4iltion of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equi(xw amcru72r /nvtm52lateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one 2u/( nrcx v2at7w5mmr of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what pu kt6w;d-s.hkoint, on a line between the two charges, u6k;h.wd-t kswould 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 charguh0akrt( r/by *l8(4xbe2 t jie is at x = 4.0 m. Where on thetrk4hl((y/ ujx*8 batib2r0 e x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the y3mnznn)e7w- origin and charge -q is placed at x = 2a. Where can a third positive charge +q)ny-nzen73 wm be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A bl+-fdqv )p 4cnurr ea0((a2vtotal 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 againstt6bp1w egtr::1kip3 g lg3f a2 the force of gravity by the attraction of a fixed proton some distance above it1p g 6gka3 l:g1 ewi:3pt2fbrt. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting t qsmgq l58 dl;+ m1ohu)vi.jq7hreads which are 30 cm long. Both a gjl il75o .m) 8su1vmq+qdhq;re 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 magni9 x86,ju i/tpcq2defq tude of the electric field at a distance of 1.0 m froxfctj 829 uqqd/p ,ei6m the nucleus?

  What are the magnitude and directe5r7k tdr:e q7qvr 1c/ion of the electric field at a distance of 1.50 m frr5c tqv7re qek:d/ 17rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. Whapd eh i:-wok26t is the magnitude of the electric field at the loci2-:6 ehodkw pation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directionz.a6-+90ult i k;1js ncg l kbnpn-(pd of the electric tz9j-cil(dkb0k n a ls6 p-+ug1n p.n;field?

  A 5.0-C charge is 10 m from a small test5haz8. lnmyfk; 5n8-coji1 oy charge. What is the magnitude of the force e-hl j1o 5f.cyzan8; mi8 oy5nkxperienced by 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 distance *g nlb 3)j /xmtd4 rak3 (+(xnfwki5/t1vfgkdof 4.0 m. What is the elikt*x1gbd 3f g)/nk5j+nv/x 3lamdr 4 f w((ktectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chrb:xay lttwd727e- 8- idvxovtu , x96a*vz/aarge is placed at the 50 cm mark. What8tv axr*owxa/ei-lx79dut,byta z-: 76 2dvv is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of1 g z(-i:*7mzalfgq - jlhkf0m a meter stick and a -4.0 mC charge is placed at the 50 c*lfha f- kjlm -0gi1:z7g q(zmm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.r .d;( :*ugomw,iwk7wd1ndv g 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.1drdi;ngd kg7 ,wuw:owv*(m point midway between them?

  Three 3.0 mC charges are at the three cornerszot ss4:h1x1)ziq.ca of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the ia x:1hz).sqt14 sozc square.

  Consider a square which is 1.0 m on a sid02kkancm+ skea4o ;b9 3suj7 le. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1);u; s ab3+9km42kce oj k7s0lna +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 pl 6rfctwu1q16m aced in a uniform electric field. What is the magnitrwc6q1ut f61 mude of this electric field?

  A particle with a charg,ncdac9f ) yw1 kv7-sye 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 fiely0rbby8u yrp c63qg+3 d of 6000 N/C pointing downward. What charge must be placed on the ball for it to b0pyyq368yg r3br u bc+e suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The) 8r )8p:cozjsbik g7a ball is placed inside a uniform electric field, igproj8 8) cz7:k)b saand is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 1 ;;1pag9gc aqv0 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm fg1a v;9pcgqa;rom the sphere's surface?

  A metal sphere of radius 2.0 cm carries i 9x6eeekht3 1g z31-nbp1cjia charge of 3.0 mC. What is the electric field ge1- e1nb jie6i h3z3pc1k9tx6.0 cm from the center of the sphere?