State the law of conservation of 5 ld7nnkp05 iha65z 3iu.yjmeelectric charge.

  Is it possible for two negative charges to attract each onagbu *)nbq:;ther?

  Is it possible for a positive and a negative charge to y (n6u xttzk11attract each other?

  A glass rod is rubbed with a piece of silk. During the proces/ mb.0v o3:jkwkrql -ss the glass rod acquires a positivems. wo-qb0 r/3klvj:k charge and the silk

  A proton carries a

  The model of the atom sh f:i98d tt5yqiows a

  A neutral atom always has i pr(s5rn;)qlrrbp:2

  An atom has more electrons than protons. Th+(f: pggb0c3hqbt. .l r+ytbv e atom is

  Materials in which the electrons are bound very tightly to the nuclei are refugzun-5tnq.8tmf 10 9cbz ix)vhh qzfr)(-0k erred q0-unvz9t( r kzfh1 g-5 cmxut0.qnb8)z)f ihto as

  Materials in which the electrons are bounm:qi.kdg,4zd pfo d33 ww6a+nd very loosely to the nuclei and can move about freely within the material are referred to a+63fq3 wazind4 .pg: w ,ddokms

  A negatively charged rod is brought near one h5zj,tp z uhyz+52z25if )hkg end of an uncharged metal bar. The end of the metal bar farthest fromkh5uy j zizhp+2z)2,g hzft5 5 the charged rod will be charged

  Sphere A carries a net positiv7+ ja0yefi me /mlgm2:e charge, 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 cor a2m0im+e7e/ mg: fyljrect?

  How can a negatively charged rod chargeb: :r2c az:i7-vafs1g 9bcmh e an electroscope positively?

  An originally neutral electroscope is brie4*/7pebg be18r)-uj:0 pn mdgt cufv70v pvlwfly touched with a positively charged glass rod. Theuj *mp8 rcvdl7 07we-e:v0p)bputng4gfbv 1/ electroscope

  An originally neutral eq ux-sl nx. oufa 1l-uc:+:ok;,zdr +qlectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, thk ;lno-f+lca1d.u ozxqs+ r : x:uuq,-e electroscope

  A positive object touches a neutral electroscop 5y 4.gty: edc5iqjo+te, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch itgqcet5 4:. j5dtoiy+ y. What happens to the leaves?

  A large negatively charged oik.j; ph/z y:wbject is 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 the path followed by the first ball, strikes the first ball, :y jzk./;iw phand 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 const;) i j1vxj4adhq(7y9 lc1n fyhant $k$, which appears in Coulomb's law?

  Two charged objects are3 8mn;j2 umjh0pt;lqv0 6bt tw separated by a distance d. The first charge is larger in magnitude than the secnmb 0w23 tpj;l6tu m8; vhjq0tond charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near3d*,e3ug-vrd -w baaf each other on an insulated table. Whi-v r3*,uwafdbgda3 -ech statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force.z)a);rz 62qgrak3sj l If the charges on both objects are doqgza z;a k 23)js)rrl6ubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces/ r ag ft2y)gp ;an7,v*1bnywj of F on each other. If the c*jbtfg r 2n/1pnay g) 7wv;,yaharges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract )3knnzvu (zj -each other with a force F. What happens to the force uz(nn-vjzk)3 between them if one charge is doubled, the other charge 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 are separated by a di 8b7o wug ( pw9v(pt4v,gqvhn0stance of 1.0 m. What happens to the 0b v wv o(9p(p8t,7vwu4n gqhgmagnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a 2f35ac9qfuzt distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed nex5ufafz q 2tc39t to the proton?

  An electron and a proton are separated by a mc8 bh/zzwzsl6;a5 h;x n d1z-distance of 1.0 m. What happens to the size of the force on the proton if the electron is hz zc;; h/ -8xl6sz1ndz mab5wmoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squarev+mrrc1x e qcj;8t, n7. 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 ox+1r ,ncm jc;rv8q7 tef 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 an equilam 64be(iu gv;bpv eyeq4h55 y(teral 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 one of the oi(vve 4qy65 h54; muegybbpe(ther vertices?

  Which of the following is 04kjx3n 5c)8gvgzsvq tqji / 6not a vector?

  At twice the distance from a point chargyk ;j 5)nwmhy0:w6/o:sja xnr e, the strength of the electric field

  Is it possible to have a zero electric field g+)z*ts3 g jfivalue between a negative and positive charge along the line joining the + *sgj3izftg)two charges?

  Is it possible to have a zero electric field value between two posix:u zsbzx5x+4 96u ltitive charges al:+xu bx z6uxit 4l5zs9ong the line joining the two charges?

  Electric field lineszx:77l2om3 (zw d drv/qiu bo(wkh*/k near psitive point charges

  The electric field shownlnvf 5;yq:)bwo(4vma

  Can electric field line j.d45ul- g ca5o ;srz6g5 vugcbbm(u4s intersect in free space?

  A solid block of metal in electrostatic equik,. ;xncfa-a tlibrium is placed in a uniform electric field. Give a statement concerning the electric field in the blan. af-;cx kt,ock's interior.

  If a solid metal sphere and a hollow metz2, g*v pvp 8bm5adp+wal sphere of equal diameters are each giv+gva 8w,* dppv2p5zbmen the same 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 re m/hycey 3q4j3p *lw9n5h cds)gion where a uniform electcl5c hemypy) d9jhs4 3/3q *wnric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equivy7 hs orj4.ymrf);v7librium near an electric charge

  A positive point charge is enclosed in a hollow metallic spher z aapf a+jvkca;2u94cbb1w/gx)c1/i e that is grounded. As compared to the case without the hollow sphere, the // 4cc+pb acx1z19a)g awa2;ifub kvj electric field at a point directly above the hollow sphere has

State three properties of conductors mx lt p/-bv;*zin static equilibrium.

State Gauss's law.

  The charge carried by onexwm3svh7/h*vf .o5g+tn ;x1os2lsnz 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 muvjrwdjl: 9bz44:50zxdw bx 9)4gr bgany more protons than electrons doe5r w z0u:bvd44z 9gd9bgbr4) :xjjlwx s this piece of plastic have?

  What is the charge on -r nr-mczb:3p 1 kg of protons?

  An atomic nucleus has a charge of jpsue7;2;v hw8fv x4 k$+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1. n7xb4yf.w91bnnszw 45 cm, have charge values of 2.0 and -4.0 mC, respectively. 1snf 9xw wbn 7.ynz44bWhat is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second 9ao*2ietdn3 jcharge, and the force between them is 1.0 N. What is the magnitude of the second 2 ia9 ejn3td*ocharge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are th ira3n:p)abl fb4m10cv: jws2ey?

  The force between a r pv0o cz+(e5u$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experien:y2q5u s dsj-rsg- jr,ce a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the elsys ,:sq-j 25rjgud-r ectric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The fii p3)ptp, tq0d1e-hxcrst 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 w 0x3tp dp1tc,-hpqie )hich acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.1ugynm .4 jx)l0 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 magnitude and direction of the electrostatic force which acts oyxu41 jml).ngn the charge at the origin?

  Three point charges are located at the following8oqoeriz,mu5p2x 0g g.3mxy. positions: Q1 = 2.00 mC at x = 1.00 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-y g2 .gz8p3qo.o x5xemiurm,0 mC charge?

  A point charge of +Q is placed at the center of a square, and a secoh1b 7; n,hvzcond point charge of -Q isc;h, h1zv7b no 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 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)5 lg7g5 pski:,eyge.b; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on t: ,5k5y.gl sepg bieg7he 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (mq)9w*e rg:n 4pdoz;j0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force onpe4o w;rd)q:mjg z9n* the 5.0 nC charge?

  Three identical charges of 3.0 mC are .hd 647d .bzbtosdbj( placed 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 of tjbdd6b z ts7d4ho b(..he charges?

  Consider point charges on2s w 2xjz6 g5q2xv1wlf +Q and +4Q, which 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 such that the electrostatic force acting on6jxs2lv 21g2znwqx w5 it would be zero?

  A +3.0-C charge is a(h)20ea * yalbimhs3 rt the origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is z ryha bhe()0*amsil32 ero?

  Charge +2q is placed at the origin and charge -q ismzba)gzxtbb g;p.0- q 4, s.ub placed at x = 2a. Where can a third positive charge +q be placed so that theg-bsz. )a0 pmb,z;u xgt .4qbb force on it is zero?

  A copper penny has a mass )i m a+-eazfy5of 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 force 2trwsyf p1,uxe5.q (hoiyizv g/ 8-x3of gravity by the attraction of a fixed proton some distance above it. How far above the electrguhq,p3i5e.y(81 w 2zxrf s t-x/oviyon is the proton?

  Two 0.20-g metal spheres are hung from a common ehxg,z d95u0j4 :xdvg point by nonconducting threads which are 30 cm long. Both are given identic zvxg9uh 0dj:edg,4x5al 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 elw oxnwtktbe 2j1 uda 8 r41im,bh210i3ectric fam1t0r4 eb1btx n i3,jdou8wiw h2k21ield at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at8kpgup r(h3; q(abl,b g7s fj( a distance of 1.50 m from ,p(7pa( qgkj(;ughbsb3 8rf la 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chargjfjv .6w5-1jsuqsml:r ag fa1/uv,7 re. What is the magnitude of the elect1wfg -u5:7 s,uajjv.arqslf rm6/1v jric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. W obd.f) oasn7 eefbth4.s1f 8-hat is the direction of the eleee7.41fft d.obsn af-)8 o hsbctric field?

  A 5.0-C charge is 10 m from a small test charge. skmvs5y ,*d e heqk x0:t+c-*fia nrnz7uh/9- What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of theshxnktyuf h rz/95i*, -s:c+qnvk0-eea*m d7 test charge?

  Two point charges each have a value of 3.0 C and are separated by a distanyq (0y1lgtrqbol+) mq4j 0to ;ce of 4.0rm (1l ;l0gqqyj)4+oq t tob0y m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter szd(: ;rfjn3xetick and a -4.0 mC charge is placed at the 50 cm mark. ;:n3jxrf ezd ( What is the electric field at the 30 cm mark?

  A 5.0-mC charge is plvx+; d5/sne; xg a7aceaced 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 ca 7xdg;e/ x;vane+ s5zero?

  Two point charges of +3.0 mdo.dtu8o oit24fgw+ ( C and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric fi.4iduo2t o8o(t dg+w feld at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sidw/ov9ulg u6x3e 0.50 m. The last corner is oc/w vg6 uxol93ucupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which i k47xqra yy,s mvlni*i-u:2vl)0z g-fs 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, 1). What is the magnitude of the electric field at the square's cent:-2n0 i y*kl-yx)a4q g7vuzvsl mfr,ier?

  A force of 10 N acts on a chi7,/td wcxovq a77m 7earge of 5.0 mC when it is placed in a uniform electric ficdivt,m7qawx7 e7 7/oeld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a lrsks-pe6/ )x .qyxqn-k) k;b 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 field /kbbc yjm3 p55o)tp0zof 6000 N/C pointing downward. What charge must be placed on the balltbbc 035)k/ jzo5ppym for it to be suspended?

  A foam ball of mass 0tk/)7m(oe4 wgyf rag -.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction fkgyr4ge-(maw/7o t)of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What ixh :i61naa*q ds the magnitude of the electric field :hq16aid*nax 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm x5nftc3y kd j) dy(:9slsl;f:carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center ofxsl3y:; kcf(jysfd 9:) tnld5 the sphere?