State the law of conservv)q rp ajk cg/41aq .m/e*c2 1pjbuzd3ation of electric charge.

  Is it possible for two negative charges to attracj5b3v 9; wo+qcn c4sgzt each other?

  Is it possible for a p3jlrdm1hq 9(j ositive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod av.. 7srf8gvaocquires a positive charge and the s8sa .ogrvfv7.ilk

  A proton carries a

  The model of the atom sho915qz 3f-krwg s7 8fml 5jzzjwws a

  A neutral atom always,j7dsus,r 2 yohaix31 has

  An atom has more electrons than protons. s4cd5h jj736oc4 /st6olbv bt The atom is

  Materials in which the electrons are bound vghi n4:a /av;uery tightly to the nuclei are referred t a;4na :huvgi/o as

  Materials in which the electrons are bound very loosely to the nuclei a;2hqzcpb9td4sx6 /rs nd can move about freely within the material are referrz6dtr2p s4;b/x9s hc qed to as

  A negatively charged rod is brought near one end of an unchargepr9;ip/ h+bu wvqrde .b7ftc; fo*. b8d metal bar. The end of the metal bar farthest from the charged rod will be c.f; p7;io8w.brch/9bp dqt +uefv br*harged

  Sphere A carries a net positive charge, asp e.w d6nq 6g,5y*xwund sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly tox6up*,wew n6sqy.5g duched with a wire that is grounded. Which statement is correct?

  How can a negatively charged8iil+. t4mpu 4ke l*bw rod charge an electroscope positively?

  An originally neutral electroscope isbm bf*n8tgm +3 briefly touched with a positively charged glass rod. Th *+bgm 8btnm3fe electroscope

  An originally neutralz t9a7c.yodphn1:ql;+hsge/-s sm ; e electroscope is grounded briefly while a positively charged glasschl :-pmzssg/.d ; ;n7y+soeeh9tq a1 rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separatk-0rn2u ure .. h0,:y bd1f2kyxtsuq xe. Then a negative object is brought near the electroscope,u2ru- :k0kxy0d e 1.bnyu tfhx2,.rqs but does not touch it. What happens to the leaves?

  A large negatively charged object ime3 mo+n2 )iv fhe9jx-s 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, and stops. The first ball rolls forward, but does not touch the negativxi e3+nejmh-9)mo f 2ve 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 th(bh dw(j s6f7be Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by urn ,t3rps w5cza3h;me 0.f6ia distance d. The first charge is larger in mrsw 3t30e5.6nzcuamrip, h f; agnitude than the second charge.

  Sphere A carries a net c4oa , 4vnmz6(xfbkjd z 77h:ytw+ ,kktharge and sphere B is neutral. They are placed near each other on an insulat+ya4 hok4 kk:x,77t(jt bmw zzd6v,fned table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges ol4gf(38a/sbo q pir f-n both obj fla(rfqob3-/gip48s ects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual att qt 302awjugr, n6h0paractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual 6 203,w jtargn0qhpuaforces?

  Two charged objects atik*b)l+5qcgpnueh 6e v)5cx/tract each other with a force F. 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 op*vg nk)c65xce 5) hiub/l +eqne-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance oft8a.ropte1bqdt 4 unn3g f9 35 1.0 m. What happens to th49 5tfqdo 8n.e3r1agp3tn tbue magnitude 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 distance otj*6jb;jqv 2p7ug+lebrd 46 sf 1.0 m. What happens to the magnitude of the force on the first 4 +2es;jrp6bgujq6*d7tl j vbelectron if a second electron is placed next to the proton?

  An electron and a proton are separate16xyoa j f)xlnunnd5 pw. 8t63d by a distance of 1.0 m. What happens to the size of the force on the pwun81 jl5nxdpnxt a yfo66.)3 roton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. lke,uir3 l)w )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 tu)kri3)el w l,he 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 a 88a 8vgiw- 7)pq+ghw rmirfs4t the centroid of an 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 one of the other 8fgi sh i)-qa8w8+r7mpv g4rw vertices?

  Which of the following is not a gnu y -t/x,e9;v5iho mzz::qa vector?

  At twice the distance frxhm(,i 3v2e.r3rgn vaom a point charge, the strength of the electric field

  Is it possible to have a zero electric field value betwere i),9eej -jten a negative and positive charge along tet er 9-e,ji)jhe line joining the two charges?

  Is it possible to have a zero electric field value betweel2ry v5y7xjjd q; bd1/n two positive charges along the line joining the two chax v7/ d5ydbl r;yqj2j1rges?

  Electric field lines,sr o3di: mhb9 near psitive point charges

  The electric field sho ruxa4 (6 08smphldu0pwn

  Can electric field lines intersect in free spl zloegfg :7((sv.a(sace?

  A solid block of metal in electrostatic equilibrium x)iwt xrhn66 :is placed in a uniform electric field. Give a statement concerning the electric field in nxwti6r) x:6h the block's interior.

  If a solid metal sphere and a hollow metal sphere of equa: *t0sax gfad8l diameters are each given the same charge, the electric field (E) midway between the center and 0a f:xt8*dasgthe surface is

  A cubic block of aluminum rests on a wooden table in a region whofg hb a06lc012 7orqzere a uniform electric field is directed straight upward. zgflc 720h06oq 1bora What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an elecb3ubu mx1,;isi s d;5-z yrcr);ktk i.l u9t3ltric charge

  A positive point charge is enclosed in a hr;0t c;m ;1dretw* ,qzl3jrx tollow metallic sphere that is grounded. t w *1;dzerm,;xrlqjct0 3r;t As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriknh(gp qfxrjb,g w c w)+7mo- 9d)1cq;um.

State Gauss's law.

  The charge carried by h:h-f- rt tfl/nm(jv-htw3:fone 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 thh h bd (zcu+w p7dq,mf 7g18.kdtvo:k0an electrons does this piece 1d.vgh 7(7: ,h 8dzdmko kcfu btqp0+wof plastic have?

  What is the charge on 1 ktnh: )iwuc- a211d k5hss(xn kg of protons?

  An atomic nucleus has a ch sex98 kq-2ex6guh9za arge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separat:p jkp /ddn,nz 05nbc0ed by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of n d,/njb nc5dp00:kzp the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is t -utnc9 k**j zbex9y,1.0 N. What is the magnitude of the se9t*be9cyk,xt n *zu-jcond charge?

  Two 1.0-C charges have a force between them of/5v2syxethb g50od78vqwa9ao a)i6 u 1.0 N. How far apart are they?

  The force between a mdk0d p286f *lqf74:lmknpuh$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, iniss 62pmc5tc8wc8x.b+nyp 0c)w cv4cotially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electcvs8 bc pm4wynstc +6c2c wc8.0xo5p)ric force between them?

  Three identical point charges of 2.0 m hyj1zq866a94 8cbqwvc wo vw-C are placed on the x-axis. The first charge is at the origin, th6ocj881cv9q b-q4azy wwwv6 he 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 charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 eu e 7 fm.rxj(nc3;.igy -)mxtmC 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 mage. nc- )jt.g; 7e( mxfmruixy3nitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the followinl r,dlem1.-d21xh - i zszz2emg 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 oi.rms2 1z ezm1l--hxez,l 2ddf the force on the 3.00-mC charge?

  A point charge of +Q is pla wz )j/0q8zgixced at the center 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 c )0/zwxi qg8zjharge 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 = -1.0 nC :zohnm aaf;vh it;j-)sp;yjrrhe: l;.4u: - yis 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 chargejylz.h ::o-jy hv-rmsrap:t ui na;;e ; h);f4?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC iy qg 3x,iyyq7:s at (0, 0.10 m); Q3 = 5.0 nC is at (0qq 3 x:,y7igyy, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of 8yg 1ry3 oyv3k:i tp*tq(tf 8aan equilateral triangle which measures 30 cm on a side. What is the magnitudyo v3y*8k( a3t t:g tyifrpq81e of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated v8 13+t6o r/bk enockb 4rsg/g6ycm7bby 3.0 m. At what point, on a line between the two charges, would it be possible to p4 +c1kb6 6k 7 r/eo/oygv8tnc bmr3gbslace 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:fh uch2 (fpz*6v xmq2 is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zxcf 2z(mqufv :hh62p *ero?

  Charge +2q is placed at the origin and charge wwpnkcv 5*x;y,*qfn8 -q is placed at x = 2a. Where can a third positive charge +q be placed so ;, p8vnnkx5**cwf yqwthat the force on it is zero?

  A copper penny has a mass of 3.0 g. A sqxxg 5(sclc4)ems.r4 j.t5 vtotal 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 againsttnfz; /56cief9 0 ymly the force of gravity by the attraction of a fixed proton some distance abov cmy/ize6;yl5f n9ft 0e it. How far above the electron is the proton?

  Two 0.20-g metal spheres ar 3vhwlof92 h2z22 zkife hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the thl3w22i vf zzk2f2ho9hreads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magniibt+5pg b wp)e sf peto 6;(fy*:a;)lutude of the electric field at a distance of 1.0 m from the nuob;e6i ey p5t wlftupbf)s(*+;agp:)cleus?

  What are the magnitude and direction of the electric field (/nuqg d;w9o lat a distance of 1.50 m fromu;/gqldw9( no a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What isfx8ptrt d9:** o+vvhpaqr y(+ 4ec4kq the magnitude of the electric field at the location of the test chargtr9ye:a+ x8v c r+ (khp4*4qp oftq*vde?

  A 5.0-C charge is 10 m from a small test charge. What is th28kiv6 ybkyj ge9ob6h7 7f; hke direction of the electrkhk8 27 7 9jyoyh;k6ivefg bb6ic field?

  A 5.0-C charge is 10 m from a sm-okr kw3jl*,ball test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location r kljo3wb*k,- of the test charge?

  Two point charges each have a value of 3.0 C and are t5 q1mgv m- w*dir*w6b(2osb yseparated by a distance of 4.0 m. What is the electric field at a point midway betwgb * 5(m6wwmrt*yq-os2i b1 dveen the two charges?

  A 5.0-mC charge is placed at the 0 cm mar6p k; myskch5(zq 86huk of a meter stick and a -4.0 mC charge is placed at th(h65; k68 qszykphm uce 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is pv.gl)bg1i76rlrf7o0r e9j kk laced 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 ar1ek79 g6kbo)i7ljr lg0rfv. line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m.y.4bwqk 9q g;d+anl -b What is the magnitude of the electric field at the poinbb qkw;.4ag- +qyndl9t midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The g; r zj6vad fv9r8(g6a/t h5folast corner is occupied by a -3.0 mC charge. Find the electric field at the center of therf(rg6z fha/v v6ao 5dt9;j8g square.

  Consider a square which 8zlk-d2 pz+lgxyk-4 xis 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);xzkyd +zp 8l-kgxl-42 +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 -9kjb g8mey t)placed in a uniform electric field. What is the magni-km 9b8te)j gytude of this electric field?

  A particle with a charge of 4.0 mC1b0qsqef/x5lz ;h j 0l 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 field of 6000 N/ f5t w.jc*6qjpC pointing downward. What c6ctqwj* pfj. 5harge must be placed on the ball for it to be suspended?

  A foam ball of mass zfchn9 2 j58pz0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform e zpf 2c8h9n5jzlectric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radiuszvd ;m ;,842vgkqf8ew9copdy 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field kw 4g2d; 98vd, zemcqy; pov8f5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is th .+w wdkkzg np3qeqfn*2;+:nse electric field 6.0 cm from the center of the spherg2w 3*:zq+dkw;p e qs+kn.fnne?