State the law of conservbh1116x0u xzbi,ifkr. jhz: iation of electric charge.

  Is it possible for two negativ4kqrg,vg ))lauerz 6;e charges to attract each other?

  Is it possible for a positive amd2(lx* ay 7c nu(g;1gmsk zfg8tm0a.nd a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During tdp 8p( 8 d:(yy*1j1zzy*mi9am fhczvdhe process the glass rod acquires a pom*j* a1p 8 z(8icf9zd(y1mv: dd yzpyhsitive charge and the silk

  A proton carries a

  The model of the atom shows a f rx b,j2,nnfjum15wfal u+;2

  A neutral atom always ha mdcm/e;iai *2z *fh7c(d4vgk s

  An atom has more elecq c)rft 8c 9 nln6f0 dk02z/uzc5*exxktrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referrcfnta3 1lf+lh+s 2dt ,ed ttn3++ c2 ,tldsh al1ffo as

  Materials in which the electrons are bound ver wb5kg0ecwu 8c /i3jd.y loosely to the nuclei and can movewi.80 /dbjec ugk3w c5 about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. Th8zmfx:a/k o4lat*k q-e end of the metal bar farthest from the co4 za-xkt8f:k/lm*aq harged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral6.rk *rwti+iocjcan;: yms3 (. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is ground(;.t ic *ojr3wk:icsna6r + ymed. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively/fny b+hfhzvbpc6 7 :* lf9g/q?

  An originally neutral electroscope is briefly touched with a positive2- pmyi;x7jvuly charged glass rod. The eleyu7i2j -;mxp vctroscope

  An originally neutral electroscope is grounded briefly while a posiury o5ps akle 2x:y2j7*y(fy6tively charged glass rod is held near it. After the glass rod is removeduyl72*k(52ayp : j sxofy6 ery, the electroscope

  A positive object touches a neutral electrrp thv6 *2zayqhs.6-d oscope, and the leaves separate. Then a y 6r-62pz.dh vqa*shtnegative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. bwfx qt6;k6kps;(2fh 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. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the nega( phkb2 xtq6k6sf;f;w tive object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulombw e q-zfy5u:/, k+tdcd constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firs-;bxix0yx r :nt charge is larger in magnitude than the second charxinx-;0 y :bxrge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near e t2 u7gl oh,re;8i1xez 3oht.xach other on an insulated table. Which statement best describes the electrostatic force bx; 1lho 2og.uer,x8 z t7ihte3etween them?

  Two charged objects attracpydz *ay t 0+objlx/d76de+w0t each other with a certain force. If the charges on both objects are doubled with no change in separationxz y+ +*b7d0pl oj0yw6eadd/t, the force between them

  Two charges are separated by a distance hv) t3ln 5ibvh/ihl3* d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the n 35bt)*hl3ilvivh h n/ew mutual forces?

  Two charged objects attract each other with a forgtq-y + tu*c;hce F. What happens to the force between them iy-*cugt; +q thf 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 b7q0r vfkml0oz9h .4a(qvz is(i:sfq- xs2tq5 y a distance of 1.0 m. What happens to the magnitude of the force on hkq.(7z2f a9qz:vs f05tm(v4- 0s r loqsiqxi the proton if a second electron is placed next to the first electron?

  An electron and a proton are gnp ,,aduj p geb8)1p4separated by a distance of 1.0 m. What happens to the magnitude of the force on the firs14 p,g gapub nd)p,ej8t electron if a second electron is placed next to the proton?

  An electron and a prot3:z5cw fef(+p-1nhi y+bhfq9y+gl sg on are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the elhgw: s9c- 1h++3inyz fpf+qyl(fb 5geectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When au ;c,kq 9bri-gzrm97a second point charge of -Q is placed at oir 9u7 qcb9ar-km,;z gne 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 o2 ifvyh08y(f xf an equilateral triangle. When 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 txfv028h (yiyf he 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 di4dyc/y( wb;2tm k+bq x )gou2f0s(hvector?

  At twice the distance from aih45 ;1kkd i yif5na kw.*.utcdv2d*q point charge, the strength of the electric field

  Is it possible to have a zero electric field9mi1vj s -p3groh-ep0 value between a negative and positive charg r-9imo pv-pgs1ej0h3e along the line joining the two charges?

  Is it possible to have a zero electric field value oehs)x0mvd/vk:tri3q0 j 0crf6;w p)between two positive charges along the line joining0w06qv tvrr0/sxd):m;koh jf3)pc ei the two charges?

  Electric field lines near psitive point9htrqgotka czw;6 1f/: 8.ywz charges

  The electric field shkewyhfnd)+v rc.b kv50,(* ia own

  Can electric field li)ntj zr mdqh fxs.h,wp-c2. /9xumg4 1nes intersect in free space?

  A solid block of metal in electros hh.6(g gm.io.xdtvc4tatic equilibrium is placed in a uniform elect.vg.h4homt c( di. 6xgric field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere,qch3phv bpb .6kywc 0+2g*qn and a hollow metal sphere of equal diameters are each given the same charge, th*vp.q6 n y+0g2pkhw hcq c3bb,e electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a regionl4w u .b so/cnd5vq +y6d*im5n where a uniform electric field is direcwy ci.ovl/um+ qds4 bnnd*565ted straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibri-kp ohmm 1cyqw+0)q.ium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groc/ys; r rx0;wzunded. As comp;r 0r/y;cxws zared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors ini: eq04op4 , +zqip3z gp(kbyfw/c3sa static equilibrium.

State Gauss's law.

  The charge carried b7 bec 0eb.yhbd:8*f( bepmj z.y 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 kiz8 6 ug8f0lxz/r hwcw66i y/af7 cg*of +2.00 mC. How many more protons than electrons does this piece of plastil8z0c8yx* w6i/w fugah7g /r zfc66k ic have?

  What is the charge on 1 kg hg*c:tmz*: 9ler2fwr0 ybb19cxcqpx ,q y/p4of protons?

  An atomic nucleus has a charge oi (et u.2zk8rnf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm, h;jin: w14iuwpjzvq9za 0 /a0f ave charge values of 2.0 and -4.0 mC, respa90w;npv 4ja1/j0uizq : fizw ectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the fb+p.0 ao zsq8z n-kd8iorce between them is 1.0 N. What is the magnitude of the second cha .zzd + bpi8n-0skqoa8rge?

  Two 1.0-C charges have a force bew m h rcuv68bn)hw+u+(tween them of 1.0 N. How far apart are they?

  The force between a nbb f rwp;9 q/0lld88f$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ini1wd n u:0 9l76zhi g-: v6cqw-onlcdfftially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is t: c: l u d0wl96zfgi-q1n ow7vn6dfch-he electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. b3xgl+ai* i23 4qwi vl 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 t33 qvl*ba2x+4iiiwglhe charge at the origin?

  Three point charges are placed on the/ tv2f /ij i*;jny+okl x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to tf*otny;i+/ jkv li2/jhe 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 a-k n:h4hy)wje:uj;xozvs , w09z+md positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC a hjaxyo d:,venzukwh;4 j)+-0:mswz9t x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed ri:2sfy e+s p-dgm 7c4at the center of a square, and a second point charge of -Q is placed at the upper-lefm f4yedi:c7s+r p2-g st 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-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m)wy lpsu( gd+nr71efpb-, 0t7;pcb*rw; Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC ch p sgbc,-7+(yrdwptpe1b;fnu 7*wl r0arge?

  Q1 = 6.0 nC is at (0.30 m, 0); Qur:l awicl,9;2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0)9alr :w;iul ,c. What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verticnhus.kv0q6pfs91v2 - hkh,y ees of an equilateral triangle which measures 30 cm on a side. What is6fsv vkps -.2ue1 nh,9yhk0hq the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, whi-c, khah,s8q0y9 4e1c3gx/wd qaai ov ch are separated by 3.0 m. At what point, on a line between the two charges, would itw,ach -30h oi9e8 acxd1 vq4gq/k,yas 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 charge is at x = 4.0 m. W rz0 /kwhs8akkvz7e(ent(*q;l;)m gthere on the x-axis can a third charge be placed so the net force on it z(8r(mlk)/ sng ;*7kk 0qwvea;ztte h is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. o5+ jy-2qs yec- jzea8 Where can a third posijcyjs8y5-e+oz a2-eqtive charge +q be placed so that the force on it is zero?

  A copper penny has a mas uxfttm0d//f.s 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 again d30 cte8 uh-ul(m;;acy witn;st the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the;;dc;tuamt3wcl (8yne i hu0- proton?

  Two 0.20-g metal spheres are hrqrda)zz, ik, 6sa)os x-6 rq)ung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apark)) a6i,qs drz6-qsorx,r az)t until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. Whx03hts nvjcdae*rc v v 9/1,o-at is the magnitude of the electric field at a distance of 1.0 m from the nnv/0v3oxa 1js*d v9hc-re,tc ucleus?

  What are the magnitude and direction of the electric field at a dista5 qwy.+ a)mlxrnce of 1.50 m from a 50.0-nC charge?ar.) +wxqlm5y

  A 5.0-C charge is 10 m from a small test charge. cyw/ qe,oa cap4r7 (mb1hxq7, What is the magnitude of the electric field at theoh4 q b y,qc1erpaw/(x7ca7,m location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Wqo2 gh;3r ;2n e3 kd3zp*;bkr0rhwzlxhat is the direction of the electric fgporez3b32 x 0; ;hn*wdhk3;r rlk2 qzield?

  A 5.0-C charge is 10 mo r+o 3:nsja1e from a small test charge. What is the magnitude of the force experienceo +aorse n1:3jd by a 1.0 nC charge placed at the location of the test charge?

  Two point charges eacx f,k8 -siyo2bh have a value of 3.0 C and are separated by a distance of 4.2 sk,yb-o8fxi 0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm sxtxz-, x* -hdup l*35w)rld kmark of a meter stick and a -4.0 mC charge is placed at thhlr3tsx*- )pz ,w dkd-xu5l* xe 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC ch6*ip:d541 rvxexnwm aarge is placed at the 50 cm maa:rvdxx m5wp4 eni* 16rk. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC ande;.zs bhr -gfu+1-3g3m,7 xkjeglgzk -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point miegf e;g h-,zk z.b +lsmx-337gkrjgu1dway between them?

  Three 3.0 mC charges are at the three corners tqv)g v/ (8zkn q7 .kr/dh4bj uep.s(kof a square of side 0.50 m. The last corner isjs4qh.78 vntk( ukd b.//g)k r( pqzve occupied 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 pz *y:1y,qkf5z/o bh xwlaced 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,hyx ,b51y k*ozqzf: /w 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 -+rtvw.k .et acu (*d7akrpn0when it is placed in a uniform electric field. What is .*nvrw0kaa -ptd +rc (te 7uk.the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of cj-is9ley9i p91k ;mi $5.0 \times 10^{-3} \; kg$. 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 electric field of 6000 N/C :0(x2qil ;us7ujiipf.5q(z2hsp cv e pointing doqjlx52u; h0z:c(psi s iq i7f2vpu(.ewnward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is place*;+w,vv be5m hsc npo8zyuo8 .b+7ktud inside a uniform electric field, and is suspended against the force of gravity. vphnv5o. 7coz,8b;ku s8y eb + twum*+ What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is thwzmi;j*g d)83 8rhm61w-hb-jt smx hre magnitude of the electric field 5.0 cm from the zi;6-xbm 1trdhwj8rh-m)h8j3 smg*wsphere's surface?

  A metal sphere of radius 2.0 cm carriek o,l i0qliy9(+nqfi7k *o/ ues a charge of 3.0 mC. What is the electric field 6.0 cm from the cen*lq+ ko9lkfi e uqioiy(0n/7 ,ter of the sphere?