State the law of conservation of electric b:15 fodlh 3 bam4:owacn5cx:charge.

  Is it possible for two negative xn2u81v qo/cl wri n6.vv+j(icharges to attract each other?

  Is it possible for a vf88w0 3uat8 f uzx3+nzoo*lzpositive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod nhgey;* h 3bkw(vb) b-ydw l7,acquires)(yw-eyvlbd bnh3 b; khg*,7 w a positive charge and the silk

  A proton carries a

  The model of the atom show2. zh y*cuxjh(s a

  A neutral atom always haq/qnp an42cm+m lz/kgrau7s .p;* *sy s

  An atom has more ele tw2,rr; r sgl81omm *1npnfx2ctrons than protons. The atom is

  Materials in which the electrons are bound very tightly to f5p-mpntnd61.jd6 u uthe nuclei are referred to 6n.jtd nufp u 56mdp-1as

  Materials in which the electrons are bound very loosely to the nuclei and can mo 4hcrw9c ba-f b t(s*l;a-ha) deel81yve 9a*)fsbhdhte4;la 1-c (al8b-ewcy r about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal8hsj 8vgl(nv5 bar. The end of the metal bar farths (vg8v5nljh8est from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. (1bs8 :p.vkv ce k+xkac)um m+They are placed near each other on an insulated table. Sphere B iskv+v8cb:.1xc a+kke (s)m mpu briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electro zdr i* dtm 8d89/(e:adxyjv9hscope positively?

  An originally neutral ele (u1 fn5f+hgumxby(*xctroscope is briefly touched with a positively charged glass rod.g f+xxym( ubu*(f15nh The electroscope

  An originally neutral electroscope is grounded brg9(zf vis0 2ukrm3a0xiefly while a positively charged glass rod is held near it. Aftefsxv k39r0m(auzg2i 0r the glass rod is removed, the electroscope

  A positive object touches a n c4fvqj3wo/qug6p r*j,i:c ; xeutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the lo3 x;vq,cg6wcj i jpq4:r*/ufeaves?

  A large negatively charged object is *io5.vwcz)a6 e rwhy ;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* ;c y5whz r.6eowi)va 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 Coum + 2oxmq9)teflomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distxic6nnj n 7k -uyvb,v / 6w+mm.cohom; *9jbo0ance d. The first charge is larger in magnitc *6n. h;bmn,x7bimj9/m6ynowov0vk c- +ojuude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placeddhevts5kkh1hjyun2r* 10re /5/d* n d;nb9ox near each other on an insulated table. Which statement best describes the electrostatic force betwednhr5/2es yjxhtdk h019db/ e*;vu*onkr51 nen them?

  Two charged objects attract each other with a certain force. If the charges o )hjdrg.k cun/fi086u n both objects are doubled with no change in separation, the force betwee/ fi hjnud.g 6c)8kru0n them

  Two charges are separated by a distance d and exert mutual attractive forces of qh;. m*nypag 1u5vj,kF on each other. If the charges are separated by a distance ofk* m, g;1pu n5jy.qhav d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F.gwx2ffx1hj6(b t *.d n What happens to the force betweewfb6tf j(.1hd*gnx x2n 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 distance of 1 8wir31el: ajr.0 m. What happens to the magnitude 8j 1ra3we: ilrof the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sepaldnio y fx2 /54yt+e)arated by a distance of 1.0 m. What happens to the magnitude of the forcy/dfeyia2)5n + 4txlo e on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distanc *l+6z.z0( 9itwfcwuhihgm9 ne of 1.0 m. What happens to t+.zg i9ilhu wmfctw9 h6z(0n*he 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 place-ho q9dic d -440qvc/tdddqp4d at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it 9tdi h qd4-p/d0 doq-v44qcdc 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 theppyry 0 s 7eeh;)c9rnmd8t5: z centroid of an equilateral triangle. When a second charge of +Q is placed at oncs7zye0 r58t) re9nd py;m:h pe 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 velhv 28 v y,tqe65(ao ie j/t50pwzmqd6ctor?

  At twice the distance ful82tg e*(kczxg- c5 krom a point charge, the strength of the electric field

  Is it possible to have a zero ele+* kor 8*m ev/f*whixdwe-k(lctric field value between a negative and positive charge along the line joining the two (f8wr*h /ok-lm*d ew xevi* +kcharges?

  Is it possible to have a zero el, r8iiyi-cw).n vd4em ectric field value between two positive charges along t,4 ey-v.d8wiic )rnimhe line joining the two charges?

  Electric field lines near psitive pointm -9nqhuya18 v charges

  The electric field shob1i +:k3bu, w79 lzkszo hcq7hwn

  Can electric field line7 bg3 sc*0zh9uoyuicec l9*e 7s intersect in free space?

  A solid block of metal in electrostatic equibuv6e4:u 1dcwv;gg/ elibrium is placed in a uniform electric field. Give a statement concerning the electric fie ge /41gcd:6bu;uewvvld in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gx62 +d2 *b uhlef 7nrg0oqh2idiven the same charge, the electric field (E) midway between the cente2quxfe2n*h72+ obd0li hdr6 gr and the surface is

  A cubic block of aluminum rests on a wooden table in a reg7rb g p0e ekj7 0,4anq-dhir4pvf9 *byion where a uniform electric field is directed straight upwarp n 4ka04gbyvh9 q,direr*fbp j70e7- d. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equm dz:su*dx9 vprnwh89da1*x 0ilibrium near an electric charge

  A positive point charb 6kfu mbpr06/ge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the horp 0/fmb6ubk6 llow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static ll1hlccf0 wakxyl- u+.9;y x,equilibrium.

State Gauss's law.

  The charge carried by8 ng;dgmg,h r) 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 +2.0v;h l :cdz9wf(0 mC. How many more protons than electroz ;fv hwl:cd(9ns does this piece of plastic have?

  What is the charge on 1 kg of tac(be,6f qe(protons?

  An atomic nucleus haht z+nb8c8mz,s 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 cm7 g wlvinbqlkp.:,e0nh 2+*ta, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forcek. 0q7e t:2nw*+bpli,glahv n between them?

  A 1.0-C charge is 15 m from a second charge, and the force betw0xrai1 aws 7qvan)06g een them is 1.0 N. What naa ari70xqvsg)w016 is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far aptd/1d 4tega-*ozgn;y-b7w x qart are they?

  The force between a qi. 64f0 aveixih,sy,k58 tci $30 \; mC$ 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 fo5bladq(pdyj8 v f e:/2rce. If they are moved to/dl(2pb j ya 58dq:fve a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the 2buive dah,:q/-b bbp7u9-hv 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 the magnitude and direction of the electrostatic force which acts on qd9bvhb-a7iuh :2-pb e/v, ubthe charge at the origin?

  Three point charges are placed on the x-cj*a( zhxuc.-n1)s m daxis. 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 dsn h )zac-*.xj d1m(cuirection of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positionsffe71b fgga2 .: 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 gf72gf bef1 a.force on the 3.00-mC charge?

  A point charge of +Q is placed at the cent-ft.tqn*7ujq er of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed thqntfu* -qj.7t at 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); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.5:q)1-lspukbul i7b pn3x9fx0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?57f bnx1:s l9ikbl)qpxu-3u p

  Q1 = 6.0 nC is at (0.30 m,y d*d*-kelks / 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on theyd- lke*sd* /k 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral ab9dd/dj; r8 qtriangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of thjd da/; 9d8bqre charges?

  Consider point charges of +Q and +4Q, which arks3,lzh na1z,f .cv2pe 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 fo1f,hsk v.2ca3 ,zplnzrce acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charg*m xx qn1bf2k7e is at x = 4.0 m. Where on the x-axis can a third charge be placed skbxx7 fm*1 nq2o the net force on it is zero?

  Charge +2q is placed at the odx2mj50m z 3n /t9e9vn :zybwlrigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it wzn3b x9l0:j mnmy2/9 vzdt5e is zero?

  A copper penny has a maetatsn5 zze3xl,v79 -fruxp0+6j (t mss of 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 of gravity by the attracyj 8fz*)hx k/jtion of a fixed proton some distance x j8*zj) fk/hyabove it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point b9hy,m -c jm w(4tdcff(: y6yzby nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the an6,wzjd(cfym -9 yty(m 4 fhc:bgle 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 ma,(mphtdb8j:bx6 d9jy0rfxz g y.5m u6 gnitude of the electric fieldxbmj(p8 d,rzb6ym fxu0t9 .gh dy:65j at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fy;rsik .l;ds.74k gs0bgdm o 1ield at a distance of 1.50 m from a 50.0-nC charg l ;d;1dko0.ys ir.bmg7sksg4e?

  A 5.0-C charge is 10 m from a small test ch8h1a+-g bph/ko ld87xd-invlge7 2+burd1ig arge. What is the magnitude of the electric field at the location o7 7+i/i pd -2gldvg-n8o1+d1br xhgaehlb8ukf the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directyk s1uowoxjmc- vt .g)9; -df1ion of the electric fiel k1y-o-9 1ug. ;vswcmod)txfjd?

  A 5.0-C charge is 10 m from a small test charge. pp.wc*hmx+ :cWhat is the magnitude of the force experienced by a 1.0 nC charge placed am *.c:+wphcp xt the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distanaaj lx ;6e*w pr:2)twnce of 4.0 m. What is the electric field at a point midway betwtwna2wj6:p; a )l *rexeen the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick an*fes ohwn*-e4/ kqw 6l o70grpd a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm markeop lsqwho*nrg7-4 f *6k/e0w?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick8 k/yn;l k(gwq 3jg*fmlix2 i0qu3, qu and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the tw0( fu mlqj ii, ;g3nwx8q3*2lqkkgu/ yo charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC arr w;., pvv gm,vt.5g(l.i49it k kxorhe placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betwe; p(9.ktvhrrl, vk,5ivgt 4m ..gxiowen them?

  Three 3.0 mC charges are at the three co ded (+xp0cw*zrners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC 0c e+zpdwdx (*charge. Find the electric field at the center of the square.

  Consider a square which is 1yrx5yezyqs:kthrd8b h0 *9 w +pwa(-4.0 m on a side. Charges are placed at the corners of the square as follows: +* yd8yp45xq ( h a0te ww:srhy-9kzrb +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 iqzq26hg0 cc/rb s b.eyx5 ;q:lt is placed in a uniform electric field. What is the magnitude of this e b2sqlec5rhcx0 ;/b6 ygq. :qzlectric field?

  A particle with a charge of 4.0 mC has a mass ojwotsn)-n 1k:,+u5d vd ay.hsf $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is ) 5s3hxjz:hzb ;.jq wiplaced in an electric field of 6000 N/C pointing downward. What charge must be placed on thjz:b ;h5wx . z)jsqi3he ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. gb ty vu-9p rvveoij, :1rm*9/ The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and u ri*1: v9b /pr9-mgvejyotv,direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +6 .ubed;ks ga-x:( ygr ,kyma82.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surgbs8,ukm; .ad( 6-r x:aeyykg face?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the:eim 6ipg:lb 8 electric field 6.0 cm from the cgmie6l::p 8ibenter of the sphere?