State the law of conservation of electric g+9o:q x a6k 5ary0in86uaw76eh a;1pa hojyk charge.

  Is it possible for two negative chargejfe8zq;. (oc ks to attract each other?

  Is it possible for a positive and a negativews yc4 2/+,u*s r ciallq0n)uo charge to attract each other?

  A glass rod is rubbe0d+5 u 9uq-ic5ckt6 efklb-xod with a piece of silk. During the process the glass rod acquires a positive chac5bk96 +i-dt 5f0ko cu-elxqu rge and the silk

  A proton carries a

  The model of the atomt4pe,up vlv4z)r o :/n shows a

  A neutral atom always +40yxu pwyf1zjxvtx5-6x+op)v wqok) 0wq u+has

  An atom has more electro3wym rfvbfma. (97z2o2ab nn0 hc hh9)ns than protons. The atom is

  Materials in which the electron*eanmh i8jz: 8s are bound very tightly to the nuclei are referrea8:n*hj 8 imezd to as

  Materials in which the electrons are bound very loosely to the nuclei an, oy+)x- oz*nz.ao poyd can move about freely within the material are referred zynzy poxa),* o -.o+oto as

  A negatively charged rod is brought cy(pzeqx9a :xu ;1y k,near one end of an uncharged metal bar. The end of the metal bar farthest from the chargepx:yqz9;(xcy ,k e ua1d rod will be charged

  Sphere A carries a net positiv/gzjof,q8uh , e charge, 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 statemenf8 zouhgq ,,/jt is correct?

  How can a negatively charged rod /da3.kqow+eu charge an electroscope positively?

  An originally neutral electroscope is briefly to)p54gg hvaug6 uched with a positively charged glass rod. The e6h4g gv5g)apu lectroscope

  An originally neutral electroscope 0xp+sz 9+ms dl) ,zvpwis grounded briefly while a positively charged glass rod is held near it. Afz s)spd0v ,mp+x9 z+wlter the glass rod is removed, the electroscope

  A positive object touches a neutralgw 7, iz1ss;v-g lkg6q electroscope, and the leaves separate. Then a negative objg,vi w7gzg s1;6s lk-qect is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed o5r yu xiux 4 309fnyo)e-9:6w zjnbicon 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 first ball, strikes the first ball, and stops.enfwrnu09 -6 yo:35)zojx9yu4ci bix 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 co j:mam1 9uly *tq(w3uqnstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is ln+ erk rl+.cg*arger in magnit+c*rn +kl .gerude than the second charge.

  Sphere A carries a net y)-r nn61nubw sc9o-cd1nv/0ogg2zs charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement b2-6vyn ngsbnn o w/u s-c)01oc1g9zdrest describes the electrostatic force between them?

  Two charged objects attract each other w eg/zp55:3szw:pm1 ha2c atapith a certain force. If the charges on both objects are doubled with nz ac t: /pp25a5 paz1eghmsw3:o change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attr a0k evpa.i-8xactive forces of F on each other. If the charges are separated by a distance ofx8v0 . paeika- d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the fo ahey99kt 6r6grce between 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? Tt yhr6ea969kghe force is now equal to

  An electron and a proton are separated by a distance of/ .ophfpeq yz,(u8 1es 1.0 m. What happens to the magnitude of the force on the proton if a second eley1zhq ,/e (eof.sup8 pctron is placed next to the first electron?

  An electron and a pr nz0 6/ id5ksz86dqqnydp 3.x(mvve/qoton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a /de i n xq 0p3 qmdzkq/5v6vnd(yz.86ssecond electron is placed next to the proton?

  An electron and a proton are separated by a distanc7)m *qgk d,. s;fhzjfpe of 1.0 m. What happens to th. qkh;fp,g7ds)fzmj* e 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 pla;ajo 0ot6axt4a7a*ra ced at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 N aa4;* joot60 xt ar7aaacts 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 equ5bb 3po hb( ngzj6jy5jb:wk01ilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N actyb:5hjn pjjbz gk610 bowb(3 5s 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 (i cebd ac 9 wmv:l*9ns/.1z *iknwb7yis not a vector?

  At twice the distance from a point chypxx2gbv7 *xehiwknb *;z;d 0x(3cb a9yp(*m arge, the strength of the electric field

  Is it possible to have a zero electric fiei;u6lieqrmr; :x2dy lpz-f9 pn .w*i;ld value between a negative and positive charge along xi*rqdy;p .n29lf:z ;il- pir6wm;ue the line joining the two charges?

  Is it possible to have a /x/h l6 qibpg/egk*.xzero electric field value between two positive charges along the line joining the twx.qkghg/*l b e/ ix6/po charges?

  Electric field lines near p,3ckt q1* pmicsitive point charges

  The electric field sh+il9il*j0rpz own

  Can electric field l:(m* seef4m fkines intersect in free space?

  A solid block of metal in electrostatic equilibrium sv n4g,2dw/lv is placed in a uniform electric field. Give a statement concerning g, vv24w ld/snthe electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere o, :yyb ck00wm6;7 f9xijatkw 5nh; pabf equal diameters are each given the same charge, the electric field (E) midway betw7pack:0j5n kwb,fy x9ty b ;whm06; aieen the center and the surface is

  A cubic block of aluminum rests on:(lbjb oi1w .f a 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 surfal(fb wi:bo1.j ce?

  If a conductor is in electrostatic equilibrium o:lpxr s++d*q7m+ 7qgi xjzyy4 r+,tqnear an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that ibxgh )4 6qiu;s9dazm 1s grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow spherqumix zg 4)a1 6dh9sb;e has

State three properties of conductors i f4/etgia )elx,1se 1ln static equilibrium.

State Gauss's law.

  The charge carried by one electrock od2q7i,*2 x lzksg4n 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. How mm/i8r: /yzegh8 *cn9 wdw(t veany more protons than electrons does this pi/ :8/r 9cn t wv8gziye(w*hdemece of plastic have?

  What is the charge on 1 kggm n8,1 za+yfle 4sh:p of protons?

  An atomic nucleus has a charge o.f,j wwu8/2pyv0d7 yg6gcipp f $+40e$. 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 charg( 3l*roxi;*flx t9 /ksib c(tne values of 2.0 and -4.0 mC, respectively. What is the magnitude of th fxsi3n**xtbrkt(/llco i( ;9 e electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the fm si8t,o6x- wyorce between them is 1.0 N. What is the magnitude of the second cha8wti m x,6s-yorge?

  Two 1.0-C charges have a force between theml+a +y .t59zm 0pnvdiyv33pjv of 1.0 N. How far apart are they?

  The force between a amf,h9(nftm axux56v qt94 +f$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ini0k5l4kjp*sz 1 saveu/ tially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, wzu p5s14kl/ j0ske v*ahat is the electric force between them?

  Three identical point charges of 2.0 mC are placed on theyesv sw4q su7ml0+4s4 x-axis. The first charge is at the origin, the4mqus4 se+yw0lsv7 4s 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 the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 sf2 he2(em 2fgmC is placed at the origin, -2.0 m C to the right at x = 50 cm, and22fm2( f gehes +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 ezubofz *:0c 6.lyvq1:u :bzs;i .dor.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 force on the 3.00-mC c*oe 6b::b :quslidvc zzy.zf;0u1r. oharge?

  A point charge of +Q is pl)a+4dpm sbz o9aced at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an ea)pzd4s+m b 9olectrostatic 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)jsy)dmr/68 iwsrehf2t4 53jj kkl)7 d ; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magikl)8r 2 7ssr4jkhfe) w/dy3 m5t6jjd nitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = - /2 wv+gqxge*b1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whagbv+/*2gew qxt is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an eq2klbj h y:q/whyn1* a -jht6 ief*xv(8uilateral triangle which measures 30 cm on a side. What is the magnitude n*1e-ykf i/j qx(hj bv8l2:y6wtha*hof the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separaa m/0c2vt /s)nmxdc q3ted by 3.0 m. At what point, on a line between the two charges, woudaq/ vcct2x03nm)sm/ ld it be possible to place a charge 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 c88j1 petfnoizz6in7* harge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force o8 zp1ej 7 izfni*68notn it is zero?

  Charge +2q is placed at the originz-7 mo 6guiyq/ and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it/7 oui6- zymgq is zero?

  A copper penny has a7utg ,vh0 -xgp mass 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 um5 b+); vbehrzbc: a8yp against the force of gravity by the attraction of a fixed proton some distance above it. How far above the elecb ye:c8;zbvm5+h)r b atron is the proton?

  Two 0.20-g metal spheres are hung ffyy .0gvz66 k n4j3thgrom a common point by nonconducting threads which are 30 cm.gz3nt gy40kv6fj 6hy long. Both are given identical charges, and the 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 chargeh,x/z-vrxn f8,hcka; rv v*8k of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nucv,n;rcv8xxkharh/ zv- f ,8k*leus?

  What are the magnitude and directqz8q; q- qrdh1/bg sdipmt52. ion of the electric field at a distance of 1.50 m from atzir-8/q1qm d;pqqs.d2bh 5g 50.0-nC charge?

  A 5.0-C charge is 10 gi4a:08 t 8p6keglftj x70tdf m from a small test charge. What is the magnitude of the electric field at thegtjpx0 tfkf8i0ea47t:8d l 6g location of the test charge?

  A 5.0-C charge is 10 m from a smldwf 5xi5 jqks 65j5(y5 ne+fmall test charge. What is the direction of the electric field?(55fi 56fmjk+jq eys5wnl5d x

  A 5.0-C charge is 10 m from a smal j-s0x6kk3i zwc:t rm, e6 0hgy6zy5wcl test charge. What is the magnitude of the forcc5 s0eyh6 06k-wmj3tgx ziy:kzwr 6c, e 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 au z 3g)l 14za*uzumy0hmrn++k re separated by a distance of 4.0 m. What is the electric field atl1y0ghmkm u)u n+zz*3+u4z ra a point midway between the two charges?

  A 5.0-mC charge is pladiok rgm5-pt v.8e*5 zced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fielded.t- *vzgmi k5 85rop at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a 9hnlr 5i )d/9cf 9ffja ()bctq-4.0 mC charge is placed at the 50 cm mark. At what point on a line joining thebffdna q)j9 9) frcc( h5/il9t two charges is the electric field zero?

  Two point charges of +3.0 mC and -7c0 xok1fh8uc *i3m5d d.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field axfh0m cou 1 k3d5c*di8t the point midway between them?

  Three 3.0 mC charges are at the thrav ,9sf3b/ig(5 x c z-3rk5;bcosfmdeee corners of a square of side 0.50 m. The last corner is occusc9a ofr fi gvcmsz (;3,d5bkxe5/3 b-pied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are po : sjpaxwkj;8cdnxn*/8i8 9 vlaced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mCw :dcnxi/pv8j aj9n8ok ;*xs 8 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 ahh;:(ng 6)6 mzbq6sveoq )e1/nu atu m charge of 5.0 mC when it is placed in a uniform electric field. What is the maghha1(ez:s)v m)u/t6 m qn 6qbe6ou;ngnitude of this electric field?

  A particle with a charge of 4.0 mC has alj)y u k(w8* v7ml)asr 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 e7apng))9e4(g ma+ q uz/iynk mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the b 79gg/4qya(aze)umipen+k) nall for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ballv, m a6; zdmu-jbxra6q.my,(z is placed inside a uniform electric field, and is 6(,jxbz qa-mm,da ryvuz;m 6 .suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC.qxs5u i vbqs;qvg 5)k,eja3-n;jdr6/ What is the magnitude of the electric field 5.0 cm frqj5r s ;v qxk)inb, s agudj-/;q5e36vom the sphere's surface?

  A metal sphere of radius 2.0 cm carrie-2 s. h(rdbksr pgvxr l(j/,.bs a charge of 3.0 mC. What is the electric field /2xksg,..vrp(brr- bs ( jlhd6.0 cm from the center of the sphere?