State the law of conservation of electrsi an-7 uj9w-aic charge.

  Is it possible for two negative charges to attract each otherv v9(0 1ojfu3oqm ap.p?

  Is it possible for a positive and a negativtwv .f1 pt2g*xe charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the p eu.c:u/ 2 w/gych* 5d6o9tihiiu,bnirocess the glass rod acquires a poh tn/*w6d u,i.uueih ic5c9:bg2yio/sitive charge and the silk

  A proton carries a

  The model of the ato lz6+ d;qo2y iiu6ec:qm shows a

  A neutral atom always hax)al e:o6 et+is

  An atom has more electrons than ;b7-sq ddl p 7j;s9zwcprotons. The atom is

  Materials in which the electrons aox.o lam8ne0 ;20gpn are bound very tightly to the nuclei are referr2x0ogm0noe8p.; a laned to as

  Materials in which the electrons are bound ves om.v+cp: 3u ey) aoqg)xc0s,ry loosely to the nuclei and can move about freely within the matoss+ xmg )p ),:qy3eu ovcc0.aerial are referred to as

  A negatively charged rod is brought near one end of an uncharged met p49p+*ogq3gyx1j(os lgjt 7hal bar. The end of the metal bar farlpox4o 3ghpg jsy +j7(g*9qt1thest from the charged rod will be charged

  Sphere A carries a net positive chab6c q7(ssa a vh-mxilo* z/3(wrge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?olsz (7-ih x(aa/qc3v m* swb6

  How can a negatively charged rod charge an ele57dod63docpis3wdf 0ctroscope positively?

  An originally neutral electroscope is briefly touchs82yzquq n/ i+ vo92pxed with a positively charged glass rod. The electros+p/u2n2qzsxov 8q9 i ycope

  An originally neutral electroscope is ggb 6 foj,1u.wwy)ofcaf x6xny,q,)4 vrounded briefly while a positively charged glass rod is held near it. After the glass rod is r) f1j,g) f,6 .ac 6x,vox4wyunqfyw boemoved, the electroscope

  A positive object touches a neutral electroscope, and the leaves separl 4afc-e75juj ate. Then a negative object is brought near the electroscope, aej4 l7-jcu f5but does not touch it. What happens to the leaves?

  A large negatively charged object is placed onll a: vf.36uoa 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 fir 6vlf :lou.3aast 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 Coule3 -*vhx3vouo h)tnw8omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cj 5f-q8sgz 8mgharge is larger in magnitude than the second ch8 fm-q z8s5ggjarge.

  Sphere A carries a net charge and sphere B k fh0c9r- ti(oiy c w:ss.q/d;is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between thems -ci0codyw.i rk(:q;s t9 f/h?

  Two charged objects attract each other with a certain force. If the charges j3y v+gt:ff5u ye l81na i5:hhon both objects are doubledhygtje va h 5lfun: 531y:f8i+ with no change in separation, the force between them

  Two charges are separated by a dista; x2ydimk ye2dm :cfe6 f5al+:nce d and exert mutual attractive forces of F on each other. If the charges are separa mydlf5x26 :yke ; +cmaf2die:ted by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a s(sj(a h,a o+vforce F. What happens to the force between(s+aavjh(so , 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 .gjmv(;f+gdi4 9xjpn qj8 +u+ rrq iwxh .5fy*distance of 1.0 m. What happens to the magnitude of the force jyg i(i.rjprw485+fnx gq9dfjqh; .+uvx* m+on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sep s+9pa6onc7v /wfao p3arated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed nex+op oac67v /3sn9 fpawt to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to 8+;a fjod1rno the size of the force on the proton if the electron is moved 0.50 m closerjfoandr ;o 1+8 to the proton?

  A point charge of +Q is placed at the center ofjec vh o9peeh1t6,5:f a square. When a second point charhjo 5c efv:he 6e9pt,1ge 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 plike49ej +s dn:, 2 a)wmhn3mbvaced at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an w,j ds)ehn9 :iea3km n4vm2+ belectrostatic 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 vectxrf elr:0gv0(w vc+x :or?

  At twice the distance from a point charge, the strength o. cllg xt1h13kf the electric field

  Is it possible to have a zero electric field value between a ng8p7:d zsp:8 w8eckri egative and positive charge g8 8 w7:kcr8pde:is pzalong the line joining the two charges?

  Is it possible to have a zero electric field value betwelc shhz(0-oa..fg/ ug en two positive charges along the line joining the two ca-h (husfcggz. l 0.o/harges?

  Electric field lines near psitn:pt fllto3yr 7+5 5zhive point charges

  The electric field shi:v f-7s;1+s9 ndn (dhkyufedown

  Can electric field lines inz1 l; t0iyxv9jtersect in free space?

  A solid block of metal in electrostatic equilibrium is placehob.j v+l ytbp,88+ugygb (, ed in a uniform electric field. Give a statement concerning the electric field in the block's in+g bug8eh (olyt8.,jy,bb vp+ terior.

  If a solid metal sphere and a hollow met9:)2z ylka (awkxf lo*al sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfwafl9 zl()*o2axk: yk ace is

  A cubic block of aluminum rests on a wooden ta wabx( 5 5zx,kpd)acd8ble in a region where a uniform electric field is directed straight upward.)adxkd,5za c(w8bxp5 What can be said concerning the charge on the block's top surface?

  If a conductor is in electrowckyo32.u n /fstatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic s( (q71tmi2 qchisjd :wphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above1(h(c2t :7qjiwi sqm d the hollow sphere has

State three properties of conduw o0 skqx.+*gyctors in static equilibrium.

State Gauss's law.

  The charge carried by one elf/-- s((goo u ch .m-zx vreyc1;lsbk7ectron 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 n4p5t/xtk;;xu rk ;tu charge of +2.00 mC. How many more protons than electr;xntkkuxtt;54;/ pu rons does this piece of plastic have?

  What is the charge otou)+gy -x c/ .h3r8 +jnuveml4u d vw*,upp9wn 1 kg of protons?

  An atomic nucleus has (9zc pbhhfa/.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 cm, have charge values of 2.0 and -4.0 mC, d3dj g4qzul:u;al h/; w+2w usrespectively. What is the magnitude of the w/3wudd;zu lsl:q+g;4 a2u jhelectric force between them?

  A 1.0-C charge is 15 m from a second charge, and h4jkp(owd a1x o(k3p2the force between them is 1.0 N. What is the magnih pp(k 143ow2jo (xadktude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart ayg 9-ep5/vnovu p,7zlre they?

  The force between a 4i i*g 97g mup.bdf 2csnn+yi;$30 \; mC$ 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 force. If they ar g(rp--.e eou ( t9,qfxske1whe moved to a ,1-ox -e w.( feeksg(hrutp9qnew separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-)7gzpt m:nv 0jaxis. 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 wvg:p z0jntm )7hich acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.btdcm/v :ck+u7h)sf ; p k;3sl0 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 which acts on the charge at thck; /vs+ftl p7;hmb3 ks :)cdue origin?

  Three point charges are located at the following positio8ld kk)us8o bwnkwql,:sa754ns: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1w8ul,n 7dokk8 qlsk5 b:sa)4w .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 ow(zn0l /m6ofpjjusm 5tj6,j:2 s bn3xf 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 th wjx3p(tn5j lzuf 0mjnom/s, 6jbs:62e 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); Q3v7xcglnf nqr7/ h 5i/) = 5.0 nC is at (0, 0). What is tvn)fr//i5g7xn cqh l7he magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = - m4h3wdbg3h t)hi*6 gu1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC gu*g h43bhmd)6t iwh3 charge?

  Three identical charges of 3.0 mC are placed atjs: erf ,7h 9hs1agt;b-tb;hm the vertices of an equilateral triangle which71s t,as h-th:be9grj;; mhfb measures 30 cm 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 jnu7 b,2:jnyu +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 charg:ujnj,y 2nbu 7e 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 = 4.0 m. Where on 3c :*-3c)dxtf 6pe 0vmv l1ouyi0jdzpthe x-d :c0)v3 lc30*xov y1tpdiuzef-pj6 maxis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x/:uc rp(a9dm x = 2a. Where can a third positive charge +q be placed so that the force on it xur c9a/p :(mdis zero?

  A copper penny has a mass of 3.0 gy/r)a(e4pl w)q h p7lnue7*yg. 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 fg.j;2q.eut xnorce of gravity by the attraction of a fixed proton some distance above it. How far abovet .g;x.ujnqe 2 the electron is the proton?

  Two 0.20-g metal spheres a/0z cbg. 6dbdgi.mr)cre 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 ad/ d c.gzrb)bmi6 gc.0ngle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of te/0 yid 7*2qutc;xr k+40e. What is the magnitude of the electric field at a distance 7 xytu*keq ;i0tc2/drof 1.0 m from the nucleus?

  What are the magnitude and direction of the e6o6r1nsnk o5ljf;n,b: nzd b8)4j +9l do xzovlectric field at a distance of 1.50 m from a 50.0-nC chargevjk+) jz8l46dobn lxoz nr1:no5;sn 6fodb9,?

  A 5.0-C charge is 10 m from a small test charggi6b(hi7 eg .xe. What is the magnitude of the electric field at the location of theg7.iig6 x hb(e test charge?

  A 5.0-C charge is 10 m fropp mt4jt/o( ll+o7ck,m a small test charge. What is the direction of the electri7l+ot,( mpkjt/o p4 lcc field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude 1u5 jv:.ow(y)gj/fncwr n,xj of the force experienced by a 1.0 nC charge placed at the location of the test ccvfw n5r1 ,uwx .g:/)jj(njo yharge?

  Two point charges each have a value of 3.0 C and are separatedwfu8 fi 384zpujp( v5n by a distance of 4.0 m. What is the e4 iw jfuf83vnzp5( up8lectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter st16ckpd71 wnfnbt * za,kj m);a)t1dllick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at kd nat)*n1) kl7jdc1mf6t;wz1p,ab lthe 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm markko(2y vf7 f/dh of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a li/2kvoy hd(ff 7ne joining the two charges is the electric field zero?

  Two point charges of +3.0 mC atbg + 0o1(evubk2iqp9 +zr+4bm:pbpfnd -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point mikp0+o u(9 mbiqfpr p+v2t+gb4: 1bzbedway between them?

  Three 3.0 mC charges ar)8ctk+4 jihuma0eba,e. :n yle at the three corners 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 8.aeej+ h)u:m0ntbk ac l,y4icenter of the square.

  Consider a square which is 1.0 m on a side. Charges are pla4fi(-7vd1h dx1 dn6xi9l)1li rthp mhced at the corners of the 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 fielixdhr x-lpnf d9hm16 )(714h l ti1dvid at the square's center?

  A force of 10 N acts on a charge of n/*cjh8ml+tt 5.0 mC when it is placed in a uniform electric field. What is the mj8+ tcm*lh/n tagnitude of this electric field?

  A particle with a charge of 4.0 mCaq) a7gebgk.u3g k9nb//tq p8q:wcs; 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 electri;1)hv zuvkmh(4b (9 h( mekxiuc field of 6000 N/C pointing (eivkm;4h kh(x9uh )ub1v m(zdownward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g ca5tiggcme9n44 rries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What ari c4eg5t mn4g9e the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chargernj6zb(wr)v( k ebyk-*p.2 ip of +2.0 mC. What is the magnitude of the electric field 5.0 cm froe vbk() -2 yjirrkw n(pp*zb.6m the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. W2)b0fk, w:n p;/fravi5s xoq what is the electric field 6.0 cm from the center of the spherei0fqpvsxna,b :5 ok)wwr2 ;/f?