State the law of conservation of electri6m0h,gf3gwohcd u3 mi 83)deyc charge.

  Is it possible for two negative charges to attract eactz*nggq 2o5/qncn,kt 5q+xx6h other?

  Is it possible for a ponojr4)/)n) pcsn *wg-fbv7umsitive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process 1.ru agi-ud :8x(ed oxthe glass rod acquires a posi- ax 1d :gxe.i8rouud(tive charge and the silk

  A proton carries a

  The model of the atom sho.1o(g9 rf. ir aut:gm;le m.mfws a

  A neutral atom always ha;;avi 4ve a4zbs

  An atom has more electrl dijdkk98ukg 7fd+ wg /u-xqi57. cx+ons than protons. The atom is

  Materials in which the electr(6fch n;j(sx mons are bound very tightly to the nuclei are referrx( m(jhs;6 cfned to as

  Materials in which the electrons are bound very loosely to the nuclei anwzz8 6ikst* 9 (skrez,d can move about freelz(s9kw* ,zriskt ez 86y within the material are referred to as

  A negatively charged rod is brought near one end of an uncpfr*eq**b:vz. wnxfn* r/ qx 1harged metal bar. The end of the metal bar farthest from the charged rod wilx q:/* nrnqx*rw*fe*v fb z.p1l be charged

  Sphere A carries a net positive charge, and sphere B is neutral. ysdm2z zrenm0w k2c. ft49.x+They are placed near each other on an insulated table. S.m.m d0+z2s4w 2nfz rt9cek yxphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electro764/u dvetghsscope positively?

  An originally neutral electroscope is briefly touched with a positively chargem2 ;2i;vzy*am:w bln sik(yc)d glass msvkiyb ln z;imy (:cwa22)*;rod. The electroscope

  An originally neutral electroscope is gjueuze mkk (7k/dihm)y8wy: ui 9h+g+:e)jz;rounded briefly while a positively charged glass rod is held near it. After the glass rod is remove9;:mhyuikzugywk8 ej)+km)+ j/i:7 eh zdeu(d, the electroscope

  A positive object touches a neutral electroscope, 0qxgdsyd a7;8 and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to t0s87d x ;qydgahe leaves?

  A large negatively charged object is placed on an insulated table. A neutrexaw+z:d,h0g( g bah(al metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the path followed gz(ewa:+ghd0 a(xb,hby 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 Cstjdiry8c-8oq( rz)cjf7 *- t oulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanti6l9)i .m(xe8e wio/+u nbz lce d. The first charge is larger in magnitude than )m9iw etie6xui+(ozb.lln 8/ the second charge.

  Sphere A carries a net charge and sphere B 0. 9 rl, ddr)ewmylj9his neutral. They are placed near each othej rdydl9)ehr,0mwl9 .r on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each ous o1as z1kj oig0is* tu;ev+ ;o:8su4ther with a certain force. If the charges on bot8v10 ;*kss o ejgs+:usaou ut4 zoi1;ih objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forcb/k4i3 a68 mrmgyy ) 0)jeumqves of F on each other. If the charges are separated by a distance ou) /mb0kvagr)48qmj6my i3e yf d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the ft w,tdb 9e+io8rmn8t+ d0oah:6njrm0orce between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to onea8od9hjn+ wmn:bret8 tmt,+ rid006o-fourth its original value? The force is now equal to

  An electron and a proton arp7 lhwp 9;)zgue separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton ifpzl9 ) uh7;wpg a second electron is placed next to the first electron?

  An electron and a proton are separated by an*fp lnt4e/ et)+ 2a*k+ 0p7rorxlrgm distance of 1.0 m. What happens to the7+ ox +/4fa)e*tl r0gekt2rr pp*lnnm magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separatedf+3n fq)e(c5h;o q(e nzt;ycg by a distance of 1.0 m. What happens to thet 5n;coen 3hc+)( (e; fgqfyzq size of the force on the proton 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. a5 n vrqm1sv 7bd+y;0d 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, bsm0d vqd;5v7 +nr1ay 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,tqz )tks 5czah0izoc e+u(* 8e9+hts 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 verticqu),zs+ 8zi ecezst (+ht0cah*k5t9oes?

  Which of the following is8 h w9cw(1w: lwqh1oav not a vector?

  At twice the distance from a poin mw5 y*48-fw xmh(5(x s:rm mxqpo:ybut charge, the strength of the electric field

  Is it possible to have a zero electr5qr+gkj2 km6tedqjy+*t+ma 7 ic field value between a negative and positive charge alon eakqy5+tq2g +7tjkmjr *6d +mg the line joining the two charges?

  Is it possible to have a zero electric field value between two mupw ip hu h:5e3x+tg* b-j3f;positive charges along the uhhi:jpg-x;3*tp 5+ b wm 3eufline joining the two charges?

  Electric field lines near psitive point cha7vrk wlj: o1spsf8n9+ , 5bfoprges

  The electric field show--gs3l85+wl ok cop.xi d1 dndn

  Can electric field lines intersect in free s1/ m-mo,gbtoo pace?

  A solid block of metal in electrostatic equil;tqe f; l2q;ggibrium is placed in a uniform electric field. Giv2gl;q ;gt;qefe a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameteokvn+x3( ev 6:ikb p(mrs are each given the same charge, the electric field (E) :px3i en(vbk+k vom(6midway between the center and the surface is

  A cubic block of alumi/)twwlf+t u)iddyh0 3num rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be sai+ hl/0y t) )fdt3wdiuwd concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neay7do7d,q/c 0g/ vnjt mr an electric charge

  A positive point char3u;nt lp:g;a h9uzpp+tn1c3 vge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abo;c 1ut9t3p3nv;n pgal + puzh:ve the hollow sphere has

State three properties ofgbk .y/os2)aq) sw l*v conductors in static equilibrium.

State Gauss's law.

  The charge carried by24(bhf 9zbrn t 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 mC. How many more pro0wco ppd/5 6ah 99jgpvtons than electrons does pph6 ap /c5v99dg woj0this piece of plastic have?

  What is the charge on 1 kgb,r2*gc s *rzdcyk t21 of protons?

  An atomic nucleus has a chax .3rpjmg;..gl oczo- rge 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 -4h8e4 hamhvs d9 -;bj9yj6aa5r.0 mC, respectively. What is thejry ; hbh aj9avms54ea8d 6-h9 magnitude of the electric force between them?

  A 1.0-C charge is 15 k69 c)7kh2f svnyblc9 m from a second charge, and the force between them is 1.0 N. What is th l6cyn v)fk 2b9hcs7k9e magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How farz: m8toxj/s ,b, un+by apart are they?

  The force between a ul:i wgbq);1trvv4+f $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi:y*jkdy9g 29qhyn 6yience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electrq k:9gyhi9jd y y6y*n2ic force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. 4nco wdtnwhzrc(ja,z 6r5 5.7The 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 the magnitude and direction of the electrostatic force which acts on the charge at the orr5crn z4 j57(dw6oatw.z,ch nigin?

  Three point charges aox9f l2crnc, 4re 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 the 100 cm mark. What are the magnitude and direction of the electrostatic force ,4onfl2c x9cr which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2hthkg8 :,0gyi.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1 :i0h,y t8gghk.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 sqg489jp 8iz g/5suiemouare, 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 at the center. 5iomje 9iz8g/8p4sug 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 atwu/l qvv85h wmg.u0.u (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net forc0u 5vl m..wg/ qvhwu8ue 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); Q3 =h*gz,.+ob( e tu fry0dv-qx5q 5.0 nC is at (0, 0). What is the direction of the net force on th,z g-rbto(x*qe0 udf5+ qv .yhe 5.0 nC charge?

  Three identical charqt1a bdhj 2.uy-y) +wct0ndco9b nhicc4;51cges of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cmb1ctodi +)q1yu nb4-hcc w2nad 5c9hyj c;0t. on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which arepk u za /il;..zp.jx,ds qz:q6 separated by 3.0 m. At what point, on a lina.;q/p.zs,iqz xj pd k:.luz6e between the two charges, would 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 charge is at x = hu3j zxh92e24)r8 igl xkuj4(dl f:ao4.0 m. Where on the x-axis can a third charge be placed so the net force za3xuj 2 (o:xgd 4k2j94fl lhue8)rihon it is zero?

  Charge +2q is placed at the origin anqiragv+ zz.,,j;us4 nd charge -q is placed at x = 2a. Where can a third positive charge +q be placed so th;4. a+qz,,rjun giv szat the force on it is zero?

  A copper penny has a mass of 3.0 g. A tz ;vj 7itzl8p-otal 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 forcy:o5a brk5fhc-7a5l ue of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the pybkc 5far7hua5o l5:- roton?

  Two 0.20-g metal spheres are hung from a common point by nonconducqokr 3ovad3 q4:g4;6mi+k;y rg nj vo6ting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion f:o iarrk;33ng4qkmq4d 6ojov6v; yg+orces 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. Whlm +pfnxa5+i- at is the magnitude of the electric field at a distance of 1.0 m fromxfm ap+ -+i5nl the nucleus?

  What are the magnitude and direction ogzt(q:,tjzc3.d 8ep c f the electric field at a distance of 1.50 m from a ,z( tetdj:. cgz83qcp50.0-nC charge?

  A 5.0-C charge is 10 m from a smalldpfl1-(,x f3l i z/seo,p2k ck test charge. What is the magnitude of the electric field at the location of the te3e ,kiskxfdl/ czp f2-o1(l p,st charge?

  A 5.0-C charge is 10 m from a small test charge. What is )a o-u6j n skxv75xq:pthe direction of the electric x 5q)vo puk6axsj n7-:field?

  A 5.0-C charge is 10 m from a smai05 xzbw/a-81 qufskjll test charge. What is the magnitude of the force experienced by a 1.0 nC 5w qsibf xk0-ju1az/8charge placed at the location of the test charge?

  Two point charges each have a kkkpk y;1p26gmvfj(v 5 -3dcjvalue of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a kv(5pmkk fj231p-; c vkg dy6jpoint midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.t2 y0;donfkc90ccg4k 0 mC charge is placed at the 50 cm mark. What is the ele40dcto;cc92ygkf n0 kctric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a megkb:nuz36/1 v t)pmna/oipt 4 ter stick and a -4.0 mC charge is placed at the 50 cm mark. At wo/ 6b341:m/u z ikgt)pnanpvthat point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed a)9h00 fmqukn yt x = 0 and x = 0.20 m. What is the magnitude h0m )nf k0u9yqof the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners ot)w mde27zj 1uxfn;/ap 4nhk0f a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fieldx7da4u/n tk n;w0f m2 pzhje)1 at the center of the square.

  Consider a square which is 1.xntmfh37n)8exkus0 5 0 m on a side. Charges are placed at the corners of tt3u 7)m5xn n efh80kxshe 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 when it iskoz7 8o e2w;mx placed in a uniform electric field. What i2e8mxwko7z;o s the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a 2mbk-wr-1/wrdxu ;r9gr,p lw 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 oc a-*xp xh;3igf 6000 N/C pointing downward. What charge must be placed on cix- 3;ga ph*xthe ball for it to be suspended?

  A foam ball of mass 0.150 g carries 0-o+w(hyk:y.l7rvxivv9hf : vgtc:ja 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 anrg 0vj7 v h-:xcv.oyi9y: lwhkt +vf:(d direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the )mg e(f gohsk7421pzbmagnitude of the electric field 5.0 cm from the emg)74b2ozpf1(k s hgsphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whkkc bxek rh 3q)e /m,nnv nm2x4yf;/ 5+r7gm2fat is the electric field 6.0 cm from the center of the spher7v)2 xxkh+r, n;mm emfg2e ny4r/3 f q5kbknc/e?