State the law of cons0 qko-x5 lsfzc*e+:raervation of electric charge.

  Is it possible for two negative char3ra 7 xxfgc **h yg6vop-ze9l3ges to attract each other?

  Is it possible for a po;5qvo7adu rhb0kv,a , 0p 0kxbsitive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the procesqb*fbnf/(q uc n.9 8jk7q4k mrs the glass rod acquires a posc/bk m(7 un nk84q.jfq9 bf*rqitive charge and the silk

  A proton carries a

  The model of the atom shows nb.-ub+j6 6+dcb gwcg1uhvh (a

  A neutral atom always haou6c- om/f-kks

  An atom has more electrons than protons. Theo 2s o8 zs8l ftw+x/)i*uv;pjx atom is

  Materials in which the electrons are bound very tightly to the nuclei 9 nwd h+,k(b+elwqyq4i(epsvfi - d,2are referrd w ,9( f-el+eisvb+4w(i ydqhpq n2k,ed to as

  Materials in which the electrons are bound very loosely to the nuclei and (93o mv4gjo/hfw x7h fcan movev9fwg fo7 h4x/(o3j mh about freely within the material are referred to as

  A negatively charged rod is brolc i tn8t1mhu96+(w xkught near one end of an uncharged metal bar. The end of the metal barxi( w+hk mt6lun19ct8 farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is ne0,/ds t6rq spgutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statemgq sp,ds6/r0t ent is correct?

  How can a negatively charged rod charge an electros*- p;)bdajoe vcope positively?

  An originally neutral electroscope is briefly touched with a positively charia6ry*3 l7fwh jn1f*kged glass rod. The electrri hf *6kf7*3wajy1ln oscope

  An originally neutral ewi ozt+tr:fv pbnt/8 ,3 wcg(1lectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the r:w( ci/gzb1 ,v wp3n+ ot8tftelectroscope

  A positive object touches v rwc3fvazu+(6,5ix n2rfi.f a neutral electroscope, and the leaves separate. Then a negative object is brought neaz6na5i+fw r. cf2(uv 3vix,rfr the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutr-1pilkq w.vr6 vcdl; :al metallic ball rolls straight toward the oc.; wl:1k6dp liv -vqrbject, 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 the final charge on each ball?

  Charge is

  What are the units ofamz:/p;ehuh2 the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge ig f l5x:4a,pcbs larger in mag:lcb5 x ,pf4ganitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed ne+7e2 znpet7p+ 3gut- sjrnz 8sar each other on an insulated table. Which statement best describes the electrostatic force betwtp3pej z-tsr+ +nu7 8ngzs2e7 een them?

  Two charged objects attract each other with a certain force. If the charwq i u ;s7e4fhc4ok:g+ges on both objects are doubled with no change in separation, the force between th+:w ho44iuefsg7;ck qem

  Two charges are separated bwz88mt/k c0 yb;fl r+iy a distance d and exert mutual attractive forces of F on each o k ;zyl8+mtrc08w/ifbther. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What pg/ hizhr(qv0ad29g.oa-wg;happens to the force between them if one charge is doubled, the other charge is tripled, and the separation aq9g vw2h.a-r;pohg/z gdi0(distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proto4s b2n4hyd3 dan are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a ha 42ds bd3ny4second electron is placed next to the first electron?

  An electron and a proton are sepas0 f -r sa:n/7apf9n e7fgqk7o6jaa z(rated by a distance of 1.0 m. What happens to the magnia za7nseksa7r fj(6a9f0 o/qf:gn7p -tude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton :*xz,xurh mh2 are separated by a distance of 1.0 m. What happens to the si,mzu2h h x:*xrze 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 squar swgas8iq* 695v6kbete. When a second point charge of -Q is placed at one of kv bt96saiq*w86 5s gethe 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. When)2mgv:l h7x l;xmnzzum(46l k 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 c: gh )zzmk7l2(mnxl64xl u ;mvharge of +Q placed at one of the other vertices?

  Which of the following is7.oxz) h d,ep o(qj 2w79bdszv not a vector?

  At twice the distance from a point charge, the strength of the electric fit ,s3 ,;y5;hrvxwrbb meld

  Is it possible to have a zep sh8o/aef 64pro electric field value between a negative and positive charge along the loape84hs/ 6p fine joining the two charges?

  Is it possible to have a zero electricvpt ,;t3guni;(8*s0 rmj dzq uv3-nmm field value between two positive charges along the line joining the two charges?,sgirjq tvmz;t 330 8d n-v(m*up mu;n

  Electric field lines near psitive point cfv9ls22r k 3z7orfq o+harges

  The electric field showg sjb:/ 0kau.el- rju:n

  Can electric field lines intersect9fyl/ uwux96o4 qmpjt.j .0l n in free space?

  A solid block of metal in electros gs/xn.ge in:sixs/4+tatic equilibrium is placed in a uniform electric field. Give a statement congsinni /xs.s4g/ex: +cerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diamet6ie:.y0haiwl +te +m*llju- iers are each given the same charge, the electric field (E) midway between the cem0 y h-iw.*l u6e+jlat:+l iienter and the surface is

  A cubic block of aluminum rests on j8 vvor0x3zc8+lli2 ia wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surface3v8c2+rzl8iv0x ojil ?

  If a conductor is in electrostatic sg /do. kiop3l;46yxtequilibrium near an electric charge

  A positive point charge is encbx0a+r ul9xq/losed in a hollow metallic sphere that is grounded. As compared to the case without the hollow slr /a0+9quxbx phere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static etuzn( it,rowu6 9,i y)quilibrium.

State Gauss's law.

  The charge carried by one electron v as884 ngxr8;qow,d z97bbwzis $e = -1.6 \times 10^{-19} \; C$. 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. r,7vou81znb 1wgxz om 0/2yrz How many more protons than electrons does thisv7 1/,r 2wbn8u0xyzo m1gz zro piece of plastic have?

  What is the charge on 1 kg of ihpvc.i941kc xe hnhf 0 rz2.-protons?

  An atomic nucleus has a charge 0 41 gawqbszbf s0s2:gof $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separatedsi hju2el4+; )d u,zuc by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the elecul)4;2e u+ic ,z jduhstric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force (zipakz*0r v2b.0)ic: ah kjzbetween them is 1.0 N. What is the magnitude of the second chargibac2jk0z )v(r: *a pk0.zhi ze?

  Two 1.0-C charges have a force between them of 1.0 N. How far acud7kd)px pq 6;zb5y5part are they?

  The force between a xp1i3zrgh2:sye6w i-) )oo nt$30 \; mC$ 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 t89p:ixq)zq3 6d3fezurc5 lpvhey are moved to a new separation of e5z pz:qvfx lqdr icp 98u6)338.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The fltz-(7e 6 sjl3:9bzfy)-gz9k 7 iqmtbr 4at vgirst 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 7f9a:bmtre--9q4z gsvtt g(l) j3y6 k bzi7zl 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( yiy 8+qd4n mw -mcq*gt:fxa). A charge of +2.0 mC is placed at the origin, -2n (8+ay4mgycw f:*qqtxmd) i-.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 the origin?

  Three point charges aw,hryaun +p4 ,re located at the following positions: 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. n,+u,a hpy4wrWhat is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point co65 weg.2:/r a(h jvm dllv6siharge 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:agm (6.s2olhrl v5/iej 6wvd lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC i3yvf isqw6oup).dn( 2s at (0, 0). What isinvso)qdufyp 2. (3w6 the magnitude of the net force 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 = 5timfsn,pu4 -+ .0 nC is at (0, 0). What is the direction of the net fo+4s- mupt ifn,rce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verticeg6zfbrsr0k:t(::8y r yjfc5z s of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which actsjf rzb::5g(kfytys c0:zr86 r on any one of the charges?

  Consider point charges og9jzdtj )n:(h:vsf 1:yfo9vyf +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 such that the ej(: sf1vzvh9 9jy y ft:ngd)o:lectrostatic force acting on it would be zero?

  A +3.0-C charge is at t 0wvspd;huw 4 cbi .k10xcu7;hhe origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a thirdhi;4sbpd0w ;kv h. uc 0cx7u1w charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed 4 3lr vhsp-8iypq4oxq .5xnk1at x = 2a. Where can a third positive charge +q be4 vo8 -s.yhlqrp15 3xqpi4nkx placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot* b8 .4vx.noan acyof;q29 ntial 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 attraction of ny+ rm bgj3pjo.-c9f9 a fixed proton some distance above it. How far above the electron is t9+c9r mnf3bp yog.j- jhe proton?

  Two 0.20-g metal sphahstrg4gtb 7lma)ecb2 )y :;. eres are 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 angle between the threads ilha4g)sc7t;b.2 e ra:)ytbg ms $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What ;dczjl pwu 9(m9w5h;o bea4jw a86 9epis the magnitude of the electric field at a distance of 1.0 m from the nucleu;me9uc4;9 w lajo8w(pbw5j9 zeap hd6s?

  What are the magnitudj- u2 ave;/x ,dt.m(ecedyq3ie and direction of the electric field at a distance of 1.50 m fr;-ed uti(/ae,cxqd .3 2jvyemom a 50.0-nC charge?

  A 5.0-C charge is 10 m from aby 08;2gjadmk small test charge. What is the magnitude of the electric field at the locationgd80m j2a by;k of the test charge?

  A 5.0-C charge is 10 m from a small te)xl0oc)th - cbst charge. What is the direction of the electric fie)0coh )c b-xltld?

  A 5.0-C charge is 10 m from a s- c n qh4wrcq((i8y ;iqf 530pauyig(kt*9 xdwmall test charge. What is the magnitude of the force euw-ncq4h9xy; 8 q5fikg(*i( q(ritda p3y0c w xperienced 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 separa hj)9qgif4t, dted by a distance of 4.0 m. What is the ,gidq) 9tjh 4felectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC xi-wdg(c, 5tk5 b*sqm charge is placed at the 50 cm mark. What is the electric field at the 30ktwx q*dmb 5i 5-g,sc( cm mark?

  A 5.0-mC charge is placed at the 0 c *b.b:6f eai:*ta(rejmsjl z 7m mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At wh zee (.rl:6a*fimsjbbja: t*7at point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC5 ey3mqmax05 y1dx g;ykd, me) and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at tkgae5yq 1e3xmmmyd 0;5d )y, xhe point midway between them?

  Three 3.0 mC charges are at the three corners ov .atz l,xi 32k xo24t9ih)gaef a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric 9a4ih ,x2ok)av3.g2 ttliezx field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargo 6k+1 fra ewrbtze(.r7u3v/c tq89jces are placed 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 mCra(frz8oek9be 7utq tc.w /6r31 vjc+ at (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on jfp m(f5 1p- jiax9h -jyt.la)a charge of 5.0 mC when it is placed in a uniform electric field. What is the magmtahxfp( 9y.1jja --5 jpf i)lnitude of this electric field?

  A particle with a charge of 4.0obdeie,w l c8e 1j,/d/ hhs wl(7/dg-t 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.ma sfgc)q20, dne 14n kfe:/bh120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the banhf )/1cb gaq m:,s4 fnek0d2ell for it to be suspended?

  A foam ball of mass 0.150 g carries a char8/ u(,rjepjaa* iw,tbm* uivcb*n,c -ge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are-ajp cme* v(a / n j,wb*,t,rub8*iiuc the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of p-4 pw;qjx.ntp t e;6s+2.0 mC. What is the magnitude of the electric fie;-x 4w ;e6.ptsj nppqtld 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is thkz3- 4g6 v-iktdn+t :hio 5qnqe electric field 6.0 cm from q i5q4kvn+-ni t:zohkg -d3t6the center of the sphere?