State the law of conservation of electric char, +z nhkv) id6 ;l(a/tsaatc;lge.

  Is it possible for two negative charges to attract eoi * 1)5ihw+x1i;j+dc +yy voj4rokpfach other?

  Is it possible for a positive and a negative charge to ak 5juw,x(sk)(nf q5v+btx8 bb gm(o9y ttract each other?

  A glass rod is rubbed with a piece of silk. During the fi6a ue44j v4rprocess the glass rod acquires a positi4464irvf e uajve charge and the silk

  A proton carries a

  The model of the ato:rg 2ykb4ao2z x,wgwx;b4 )frm shows a

  A neutral atom always hasr dkuc;61rr p;l 78lzn

  An atom has more electrons than 0rj/w1;,jj ,wbz k;mr pzadj .protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referrlowhvjy 79we/ e,-21+ xj h(bs,vrs pfwxy1 -j9r o, esfj7w(ve v +hlbsp/h,2ed to as

  Materials in which the electrons are bound very loosrw 9vn -g2oxo0ely to the nuclei and can movego x9v-n20row about freely within the material are referred to as

  A negatively charged rod is brought near one end of an unchwxoh 90sny+s;5b*mw7hyke1qtxyp ce(.qn5 .arged metal bar. The end of the metal bar farqsth( 91 +5eckx n0;hxy nwywem. y b57*.qposthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is w8/tokb:u+ags cf2dq* uf)f 9ta : z0mneutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. d2u z+a) 9b*ftc wofat8mq/ sg0:k :ufWhich statement is correct?

  How can a negatively charged veul5 )n o.b0uwi/,yyz+,hpjrod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a poyuj lg/6l // muh(4sswsitively charged glasslg/s 6slwh/u y/4muj( rod. The electroscope

  An originally neutral electroscope is grounded b1( l8 dz9n 8uatmdub+yriefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscondtuaymbul8 9 8+(1dzpe

  A positive object touches a neutral electroscope, and the leaves dbb8.p;8of qshpjh ,)separate. Then a negative object is br )d.;hb8 ,obhpfs8pjqought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an fb3 zu0fu06 nlinsulated 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 b3b06fzf0 uunlall, 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 Coulomb con1d) h pkf/s1pnoyq7, istant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The gu q:onivy qdtf fu2d m ;3+26pm,-t*bfirst charge is larger in magnitude than the second char;2 mum:-vqgd y un3*pdi+t6ff2t ,qob ge.

  Sphere A carries a netn+3j;j9/v(zmy w hizxp. gt,l charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force bexjy,/n3.itzp +h;j(g vlm 9 zwtween them?

  Two charged objects attract each other with a certain fcb;s a3bs :y47cuc2 hnorce. If the charges on both objects are doubled with no change in separation, the for ybbsn3;cuch s c27:a4ce between them

  Two charges are separated by a distance d and exert mutual atz9n,nr*( lu,6rh;t dts1bpmvtractive forces of F on each other. If pn1,uh(b,t9trlsz *m v ndr6;the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forb iw1ph* /zr80 bhqnh etp0so ,9p7uw.ce 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 reducehhtbn0whw.,9z r8u*i p7 o/e1pspb 0qd to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by agx.ew ylxg+ (.xy,e r: distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed ne xy,.x.lw : eyeggr+x(xt to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to 6f0 gh*r* x4z v*jsvcdthe magnitude of the xv6 rs 4jdf*zgh*vc 0*force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 3 o6 )fh(2buq8qpkpyrzd/jy9 m. What happens to the size of the force on the proton if the electron is movpj /q9 fk r)zy o(u2d3hy8qp6bed 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second/flog 5mz liw*:btb96ozg94 o point chargf9zlg4*:ol 6o9io gzwbm /t 5be 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 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 equilateral triangle. Whenvi7h(i t;-o:kskv xv* 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( kvi*kvix:ths-;7vo at one of the other vertices?

  Which of the following is not a vector/0nda(u du* .os 4xwgp?

  At twice the distance from a point charge, the strength of /qr/6-f qrh jqthe electric field

  Is it possible to have a zero electric field b2-hfg; zvqjh ,4ek;(cj0b i rvalue between a negative and positiv40hzrjb ic-kv , f ;g2e;hqb(je charge along the line joining the two charges?

  Is it possible to have a zero electric field value between two po kp7ie.,pfm :-xnj o:ssitive charges along the line joiningn7.oxim fp:-,j ekps: the two charges?

  Electric field lines .i)09r-hx lbh uuy e/nnear psitive point charges

  The electric field shu 9hx)o.t,k s1i lt+khown

  Can electric field lines int5 f gvot5c*fqt/ s/, 5kmtv4juersect in free space?

  A solid block of metal s c8wf-) s7tsfae+oikz-+ v9s cg51 fuin electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electrz1icf 7w ss-)sugkfacvt59-oe 8f++s ic field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of d/ 2rpvxyk)x2equal diameters are each given the same ch 2vx/2 dk)pyrxarge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wh epqhas gcw/mg(dt9s 68pi5 (3ere a uniform electriq63hg9 asg t wi8epc/md(5(spc field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in el* iensl v9r)d)d+i7g vp b8ckjsb y/9.ectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thetp:g(bxn1-..sog6x ms4k a nat is grounded. Aso (g-x 6.x1gmeksn4 ta:b.p ns 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 sta, 8vq0mxx3( apq/ro futic equilibrium.

State Gauss's law.

  The charge carried by one electron i4ir 6c; sbd:cjs $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic h i/*pwigaac zr2n04k 0as a net charge of +2.00 mC. How many more protons than electrons does this piecka2/anp wz*0cir4ig 0e of plastic have?

  What is the charge on 1uh/2hv mn4 qt0 kg of protons?

  An atomic nucleus has ad7vf9vl5*rs* yy sik7 charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated br d8g veq;8b*b9e n/nxy 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the /n e8dx8 9bvrb*egq;n magnitude of the electric force between them?

  A 1.0-C charge is 15 m fromd,.wn3 0bta *b(lrjfw a second charge, and the force between them is 1.0 N. What is the magnitude of the n,*(w wbj 0a dl.3btrfsecond charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they - 4ku./dmh 7bjruu)ev?

  The force between a as1 tyz:b ;c;e$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.*2 au83w m;da ms j0aie5axpa90 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is t0 i9dpsx2je35 8aw aaamamu*;he electric force between them?

  Three identical pointffz*mbvg(r9w7 c/w+j charges of 2.0 mC are placed on the 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 thefrwz9g(m*cf wb/+ v 7j 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.ur11byuc)o ky1:re 7gva- x w80 mC is placed at the origin, -2.0 m C tay)buxu11 e1 v-87 yrg:rkwco o 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 charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x =c. jtp30lx lbh1 m8tt;e:rrs2 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-mC chmr cl. 3btxh028tt ;lse1rpj: arge?

  A point charge of +Q is placed atsko9o mi,k4 cw +gm3z0 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 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-lesz,omw m3g40 o+ ckk9ift corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Qiwe9 b3gqf65l8vgx5g 3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC lg365eg859fqg wx ivbcharge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q i4 u3m vvrab8-:u.nkb2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is then vma3r:vbub4 -8 iku. direction of the net force on the 5.0 nC charge?

  Three identical charges ocw-egi*kc: 9 cf 3.0 mC are 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 the: 9g -ccw*ckei charges?

  Consider point charges of ) boqk2 t xj9p0.dnzk4+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 sk2xz jn0.dpqok9t 4)buch that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a tmu;ql1s00 uj+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the ; juu0mqs10lt net force on it is zero?

  Charge +2q is placed ln jaz,1pn9h-g-o3b4i mgs8g at the origin and charge -q is placed at x = 2a. Where canaz m4js9-hi-g g8 n, l1ob3gpn a third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mj 82r*59jepw nhd(rz0 1ynukvass 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 attractij dbtp:r 7k,s3on of a fixed proton b 3rsj7 ,kp:dtsome distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonr(en e sj mx/q8,:l6rnconducting threads which are 30 cm long. Both are given identical charges, and theqr,(n/ nr 6 js:lm8xee 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 ofz- fvv)em2gj; +40e. What is the magnitude of the electric field at a distance ov)-emjgv2 z;ff 1.0 m from the nucleus?

  What are the magnitude and direction o /ijls0bo9nzafnmm 2itpu9j 8v)455df the electric field at a distance of 1.50 m fr/5nv oms4zjfl2i np9)tm89 5adj b ui0om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What ie f m(tla 74fz.pfj-8os the magnitude of the electric field at the location of the te7ela p-ft 8 jom.(4fzfst charge?

  A 5.0-C charge is 10 m from /m33sqhaqp 1ta small test charge. What is the direction of the electric fielmts3h1/q a q3pd?

  A 5.0-C charge is 10 m from a small test chat*r3 x/a g,t ;ni5/)g8jh bkodgr7.t;tfzus jrge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the locati a;orb kh rgjt;d f,j* z5i/tts.x8gg)3un/t7on of the test charge?

  Two point charges each have a valueie./4rn):o r dp/o qlf .*vmfh of 3.0 C and are separated by a distance of 4.0 m. What imnv./ ir or* p.h)fle:qfo/ d4s the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at3npcm c)aoqo q9)vh1jv: s;orj u.(u) the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm1n: )sjm;.rq9coh3op) q)ujo acuv v( mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed y(pqmy807 k zjsv )b3qlno6(cat 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 fiel k zbo) m s68ny7pvlc0jq(3y(qd zero?

  Two point charges of +3.0 mC and -7.0 mC are placed g ymwpc6; ;g8kat x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between the cp86ykwgg ;m;m?

  Three 3.0 mC charges are at the three coc5yg) 2kugzi )huk, /vg87x lfrners of a square of side 0.50 m. The last corner is occupied by a -3.0 mCf2lu ky7vg5h)/z)u k gx8,ic g charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cornf z.g whr*eq(r7kab2 /ers of the square as follows: +4.0 mC at (0, 0) * 7 re2qfkzr(w.gb/ha; +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 actst*epncl)j vga3(/ h7j on a charge of 5.0 mC when it is placed in a uniform electric field. What is the m/tjvg(lj3e*h c)ap7 nagnitude of this electric field?

  A particle with a charge of 4.021gifb iyc-+ c mC 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 i2nd eafzu a*3+2 0frnvne-p2 hn an electric field of 6000 N/C pointing downward. What charge must be placed on the 0aav2*unr+ f n2znedf3-e2phball for it to be suspended?

  A foam ball of mass 0.150/-8:dz dgx gyr 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 of the elexgyd:gd- /r z8ctric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 a0 7z0hkvw: h8eb5t/xspi.fo mC. What is the magnitude of 0/sx.i5 78fhowpz0 habe vt: kthe electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a g+tnwp*vo6 6zfx+ya:8c1 m j,z y1rhecharge of 3.0 mC. What is the electric field 6.0 cm from y v x1ze,*6hroctjapg18wm+ n6z+yf: the center of the sphere?