State the law of conservdk2 dn* on4-l4o mftfo /j04yration of electric charge.

  Is it possible for two negative charges to at uye /u177zxsotract each other?

  Is it possible for a positive and a negativ o bb7b2g:z*rwl3y6aue charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the provyqdsmn p58 7w:qr * 1zl5ntg2cess the glass rod acp 21s7qlzn:r5yq wng *5tm8vdquires a positive charge and the silk

  A proton carries a

  The model of the atom shows aabmb. ym0o: +a

  A neutral atom alwaysx(zttltn)oyn ln o*m6 9,37qn has

  An atom has more electrons than 5:4/d)a basmg1 ,gci ,pjpluu cf6lr:protons. The atom is

  Materials in which the electri7ugnm5kug;3/e /rz tons are bound very tightly to the nuclei are referrz/5/m 7 ur;etgiu g3kned to as

  Materials in which the elg y7oeif80l0 zectrons are bound very loosely to the nuclei and can move abeof yzi087gl0 out freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metalh wkc1 ;h38w99qe jffakrvo0) bar. The end of the metal bar farthest from the chaf wk9f8 hhvjrq0)9ac;o w3e1krged rod will be charged

  Sphere A carries a net positive charge, and sphere B ist :etl-98h4 +d kjyti2nt0 cxp neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is 49 h nlpdt0+:t-yctkxe i82tjgrounded. Which statement is correct?

  How can a negatively charged rod charg3c.n mz3 v8nx rgj1lb(e an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivelf 1/d)hzmnf;shm/*:llrmh p1 y charged glass rod. The electrosco m/mz1m nhhf*:pldr; )f 1/hslpe

  An originally neutral electroscope is grounded bri k;e zifmb9+p9 d)k2r q3iowk+efly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscopeo+m;d9k q izwb r)f2ik93 +kep

  A positive object touches a neutral electroscope, and the lmhuc.j1 b1kie+ 7r0 kjy: ,zzreaves separate. Then a negative object is brought near the electroscope, but does not touch it. What haj,mz.+jyrubr70 c:kz1h1 iek ppens to the leaves?

  A large negatively charged object is placed on an insulateds q0ldxvqg9w8tgh +/4 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 negative object. At no time does either ball touch the negative object. What is t0/s8gg l9+wd xqvt4qhhe final charge on each ball?

  Charge is

  What are the units of nb m++584i04hpwusaq v2yw el the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fireew9cwo((jgw egwx5x67b ;(jst charge is larger in magn;e9wj xjgwx e(b5e 76cgw(o(w itude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near e9 12 eztuea.ezach other on an insulated table. Which statement best describes the electrostatic force ba u2tzz.e91e eetween them?

  Two charged objects attract each other with a certain force. cq b/qpmj 7k): If the charges on both objects are doubled with no change in separation, the force q7bjk:mpq/)c between them

  Two charges are separated by a distance d and exert mutual attractive forcebi,a7t2 r+;jfbn;+:u fxn dyb0e1 pxls of F on each othyl xrpn+befx,u07fb;; :na1b+d ti2jer. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othe5s c ep r7bjq:zy)s xzdm.u*7.r with a force F. What happens to the force between them if one charge is doublcduqmz77erp .s 5y) js:*zb.x ed, 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 distance of 1.0 m. What happens to ap8*r me 0/qtmn4e:zithe magnitude of the force on the proton if a second electron is placed next to the a mi0m:4/8pz*qetnre first electron?

  An electron and a proton cq-bl a3:1qjeare separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placeb-13lq: e aqjcd next to the proton?

  An electron and a proton 9pl )qk4/bla vare separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50lvl)q p9b4 /ka m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secondy z v)xqx k8-sx5str2+ point charge of -Q is placed at krxvz tx82sy- xq5s+) 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 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 an equilate:fus*( qzvw a7ral triangle. When a second charge of +Q is placed at one of the triangle's ver(vfuz *q sa7:wtices, 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 vehqu-es od c0cvg -x0tl3v *:,uctor?

  At twice the distance from a point charge, the stag*p8y 3epf/urength of the electric field

  Is it possible to have a zero electric f1m kvg2wj1+ .n.)b j5 rsgsjcqield value between a negative and positive charge along the line joining ..cj1gqm+sj bgn1 j kw)2r5v sthe two charges?

  Is it possible to have a zero gio 2kfmf5 t 05xy79vxelectric field value between two positive charges along the line joining the m5k og5i07vftx29y fxtwo charges?

  Electric field lines near psitive point charges fpl7d4 zx9fixl4q--rh-:w d f

  The electric field show2*.iru8d-my mcl lz-in

  Can electric field l1+xu ,re(vwgy ob* a: y6xymq(ines intersect in free space?

  A solid block of metal in electrostatic equilibrium is plal1wz1 m ,oott+k )6wcoced in a uniform electric field. Give a statement concerning the electric field in the blo + tm)z1wl o1two6cok,ck's interior.

  If a solid metal sphe7sib q8hm9e x/re and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and qb/9xsme8 h7ithe surface is

  A cubic block of aluminum rests on 5 0givgaoq 8ves+. 2yea wooden table in a region where a uniform electric field is directed straight upward. e5 vey8+s.0aqggio2v What can be said concerning the charge on the block's top surface?

  If a conductor is in electr:g:fr3/ruc ;bgt+zcy ostatic equilibrium near an electric charge

  A positive point charge is encc al n4ycpax23) ,c/kqlosed in a hollow metallic sphere that is grounded. As compared 32/, ayxqc)c nc4 lapkto the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in statir*b;at6x+pr/r.j 07e xu2ln :rgu2bprb0t sdc equilibrium.

State Gauss's law.

  The charge carried by one ele*r x( l/iakiu6ctron 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.;jt.s5rmdvk r- bo ;9y How many more protons than electrons does this pie m-ryv obtk.9dr ;s5j;ce of plastic have?

  What is the charge on 1 kg of protons? ckgrpn353 hz mws yr434azb73

  An atomic nucleus has a charggr b)iox +)z5jwq1 k:jlo o:q)e 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 ch1flbm3 t,o; bearge values of 2.0 and -4.0 mC, respectively. What is the magnitue1f o;m3,lbtb de of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force b//qzcn.(g67+osa 7z jkz*lt oj dus *aetween them is 1.0 N. What is thej +nj /o7gscz*/ 6l7dk (z.aqt osza*u magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far lh.( c8ipan2 8 eyvre1apart are they?

  The force between a cz* vtbz+dzzfd, -gtj c8d 389$30 \; mC$ 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 forcz.lrn3o obu+wu xthf113 t8 2w. g3kvte. If they are moved to a new separation of 8.0 cm, what is the electric force between th2l1v o.u3 t1 h3w+g8uow bkfxtr.znt 3em?

  Three identical point charges of 2.0 mC are placed on the x-axis. e6,n -oolr 5la0)zsd z The first charge is at the origin, the second tod 0zll) -,rsnoaoz6e5 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 mC is plac8effi v2 de1qk5xtq ,*ed 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 on the cha*i,xed8q21 f e5qtv fkrge at the origin?

  Three point charges are located at the following positio/- w6h1lsuwh0,uzmhwns: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x/ l0,- ww6zuhwushmh1 = 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 lxcny8 a/n;2ycenter 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 aycn;yxn8l2/2.0 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); Q2 = -1.0 nC r8op,j ls -stm zo59j3is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What i3s9l m 58st-jj prz,oos the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); b*s63 v 7rnu0zgl*mig Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the *lg6vb 0miz*g7nsr 3 unet force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are plakz5s:zjaf7g)6qt7 xwa i.m 4em3ve;dced 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 d s vkgmx.mza:wt567 )4;7eefjai3qz any one of the charges?

  Consider point charges of +Q and +4Q1/38k(9n akxtlsqute, 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 thaek 1lx9(kst8/tu aq3 nt the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a :zmpedoyevfvef k7)9)34bfz *91 doa+9.0-C charge is at x = 4.0 m. Where on the x-axis can )bpd o:)9e9k z v 14fe*y7z veoamfdf3a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q v 2hza9jv7hqu 7 q2y9lx.c3bf3*buo x is placed at x = 2a. Where can a third positive charge +q be placed so that the force qx bulvh3yh2qox *99b3u.fv 2a 77zcj on it is zero?

  A copper penny has a mass of n )pf-4u j*nae79n g7zls *zne3.0 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 againstq o)j3k 9tw *kvby/(2vyj-rcu the force of gravity by the attraction of a fixed proton some dist )u 9qk-ot(wbjyyj *rvk 23/cvance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common riutbjw 7alkly,(y46*7pnu 9ee,j g2r ,cit - point by nonconducting threads which are 30 cm long. Both are given identical charges, and t7aj6r(,ey2-,iigl j,ew9 yk u7ln4ctubptr*he 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 electr x kutv)w1u),om 0nor-ic field at a distance of 1.0 m from the nucno -ukv,01or) )mtxwu leus?

  What are the magnitude and direction of the electric field at a distance ojlpsismb j: )+q9;7rj f 1.50 m from a 50.0-nC charg+jms;s:q )l9 jbj 7rpie?

  A 5.0-C charge is 10 m from a smaj y*5fefo i7k/ll test charge. What is the magnitude of the electric f/ijo*5e fkf7y ield at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. 4.e(myn;hf9 s,a ipu ssc)0bmWhat is the direction of the electssc baun9p () ,h4s0.mi;fey mric field?

  A 5.0-C charge is 10 m from a small test charge. What is ti2u oicz u/2a dff8f()he magnitude of the fo 8a(ffc uz d)fi2/io2urce experienced 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 separatfwtk.m /:8ixe ed by a distance of 4.0 m. What is the electric field at a point midway betweef et/x w:8kmi.n the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 it/jwi*kci mu)53fi(vf;xp:shq* /r mC charge is placed at the 50 cm mark. What is the(h / *vwp*qfjt3r i f;)xksu /cii5im: electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark aqcv:tv 6 k,g::7ueguof 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 ::gv 7ukg:6 avt,e cqucharges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 jkq pi bpvp**ko;) ,d)mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field a ; qk)dkp)vb pj*oip*,t the point midway between them?

  Three 3.0 mC charges are at the three cornev ml;ktzn 0klsd5,t/y 0,pb5i rs 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 squar, svy b5zl/td,tlk0 ;nmpk5i0 e.

  Consider a square which is 1.0 m on a side. Charges are placeyo,l p)cx./ qsrnx23t.g0kd ojb)p(d d at the corners of the square as follows: +4.c,)jn.bdk )l/.sryp0g2oq (d 3 ptoxx 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 is placed in a uniform eledx2jb 8+f/+2wgl)s necc/zr fctric field. What is the magnitude of this eljg8r) e+c /l2 f2wn bsc/xd+fzectric field?

  A particle with a charge of 4.0 mC h,aerg. 4yhm e2as 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 w *lr-sswc5gi/w rahm,/q/pt /h:u w7electric field of 6000 N/C pointing downward. What charge mustq:wg/ rah w/lsi/h mr,up w5-/s7t w*c be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carrivda jhr9zn d/irp4x i3: d,5)ies 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 dir/4z3,rrdi i9xipd vdj5 h)na: ection of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mud;roxi b89ap2b g /g5 rgt.6k*hh:fm:ws;hmC. What is the magnitude md59or.6k/:pw gi gt 8a*gbm b2xfhrh h;:s;uof the electric field 5.0 cm from the sphere's surface?

  A metal sphere of rad9x 7p , ,nth8-c1p9rrn lkv sz7hzhrt3ius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the cvzt-hnn7,ph shlrr17pr t98ck9,zx3 enter of the sphere?