State the law of conservation of electric charge d,cwnr, 48rx x/hedk(.

  Is it possible for t cshbva0r 3u(4jm )prb2nn-/xwo negative charges to attract each other?

  Is it possible for a polhi7tpy0zuk g* :dn** sitive and a negative charge to attract each other?

  A glass rod is rubbed wiylh5(/oh0 6pgoe (q hdth a piece of silk. During the process the glass rod acquires a positive charge and the seo lopyh(h0d(/g 6h q5ilk

  A proton carries a

  The model of the atom rb4*jjjd noa.(8ywh1b j x96y shows a

  A neutral atom always hasnkxz+z(ox(zknx/ ; 4 ocxb yva3eb 24)

  An atom has more electrons bbmc*f )l1g l 9(sc2u;x:bga jthan protons. The atom is

  Materials in which the electrons are bound very tightly to the nu8a /cp7dxf 18fs pmy6wa :foe;clei are referrp/awpxsymffo; eca87fd1 68 : ed to as

  Materials in which the electrons are bound very loosely to the nuclei and can mne7g o 0j-aiu3ove about freely wieijago73n 0u-thin the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal g t205 mfe,pa(7orqdtbar. The end of the metal bar farthest from the char,(mp g5fqto 2adt7 0reged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They argrasp m: 5u6e8e placed near each other on an insulated table. Sphere B is brieesr5 6ugp8m: afly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positiv))dpi0snteu -n yo *w8ely?

  An originally neutral electroscope fbe: s81egozqn.km- 7is briefly touched with a positively charged glass rod. Tsbzm-e7f.8 :k egno1 qhe electroscope

  An originally neutral electrosypdo;(z e+ awei 1rh1:rfk( h5cope is grounded briefly while a positively chargeiwa dyr(o 1r ;p+f(1zkh5:heed glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and t- j+v/g3syz(u8 i j-c u4iz0cuq*khid he leaves separate. Then a negative object is brvk-4jii80uccujy3d (izq -+*/u h zsg ought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chargepqn j f8 . 39d--or jlcrt,urzrp6(g8cd object is placed on 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. The first ball rolls forward, but does not touch the negative object. Atp38c rzrp-n ,9 (f8lqud-jgr trc6jo. no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of d5u.khmn.sedx x-;-r the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firsts4me)je.s vh-p p-f- b charge is larger in magnitude than the second charge.sppsh.mj4)ve- -e- fb

  Sphere A carries a net charge and sphere B is neutral. They are placed hv /uq6)cii0 vt)9o gpnear each other on an insulated table. Which statement best describes the electrostatic force between uvhqogp/)it9c 0i6 v)them?

  Two charged objects attract each other with a certarb ,1qlpf 4r0md +f-zeto+8 hrin force. If the charges on both objects arerfft rlboqm 4-01hr + +zed8p, doubled with no change in separation, the force between them

  Two charges are separm ne2xo 8q3gb.t4jcg9ated by a distance d and exert mutual attractive forces of F 4e3 o2 jcggn. mxbt98qon each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects ad4g2k) z vn5zottract each other with a force F. What happens to the force between them if one charge is doubled, the oth)kg5vn 4d2o zzer 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 sepste2zytl/, a5)ca +mw arated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second m,+t ws/ye2a5)lc tzaelectron is placed next to the first electron?

  An electron and a proton are separa-h,o k6* ydbhi7ravrz8j: q8a ted by a distance of 1.0 m. What happens to the magnitude of the force on the y -8 6rdqkbv:ha*h7ajoz8r ,i first electron if a second electron is placed next to the proton?

  An electron and a proton are separatez8fz y,hpe :ob9p34 m8tu h2zrd by a distance of 1.0 m. What happens to the size of the force9e, uztm2zrf43ozp:hy88 bph 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 square. When a s/8 tseeac;lt( i3scu8econd point charge 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 ecct;ets38sl/iu ( a8 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.uf 1tq 4vw.4ux When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.tquvu1 4w4.xf0 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 no,i .pvvidwdssc o3;q54xb 7 d;gn8f(hsw76m at a vector?

  At twice the distance from a point charge, xrtg dcz0-x-:wbl*cyf:**p( q7y dj fthe strength of the electric field

  Is it possible to have a zero electric field value between a negative and positimf)2ey5e)w3c8 xxqd i ve charge along the line joininyx8 5mcq3wdeif)x2e )g the two charges?

  Is it possible to have a zero electric field value between two positive chat) kwvr fr3*j+rges along k 3t)fj*rw+rv the line joining the two charges?

  Electric field lines near psite:ri-e1)y 3azyk k(o45oupk4h yp rt3ive point charges

  The electric field shw+4rk mlf8 k;lxpxp+.own

  Can electric field lines inte yz02di( p8;4g 9q(nmbsnui kwrsect in free space?

  A solid block of metal in electrostatic equilibrium is p y/4iiwmezc1 gll-z.m(zy+ p+laced in a uniform electric field. Give a statement concerning the electric field in the z gm zc-i4 ++w./ yzlil1y(mpeblock's interior.

  If a solid metal sphere an:(go( hdlsor 7d a hollow metal sphere of equal diameters are each gived7ohsg:o( r(l n the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on ke0w 9eujr,sqk6gtp : :+5b fxa wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the bloc 95:k eg: eu+qwskb60t,fxrpj k's top surface?

  If a conductor is in electrostatic ;fco:3gr e/7 k sbshz0z1.crzequilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that v+jz 1gr rg(3mia*: ukis grounded. As compared to the case without the hollow sphere, the electric fielu3a r *kj m1:rg+vz(gid at a point directly above the hollow sphere has

State three propertii:,dn2ue b 97rn2kbj7oodouxt4+n (:k cyc*bes of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is6n)iq*jrbxqj)ox v/ . $e = -1.6 \times 10^{-19} \; C$. 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 i2,; t:o. 2fjgakj3w 8ttirlq. How many more protons than electrons does this piecoi.i;,jjt 2r3:tg2tf 8klq awe of plastic have?

  What is the charge on 1 kgxa : r3mja f36eo9mbqrs1 caw50eh55k of protons?

  An atomic nucleus has a charge :/w;vshnd6w9 tohm u :t ysj3,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 kv -c9ljz 6xsdu+,s +bo(g0mrand -4.0 mC, resp+m9 cdk6x(uz svg,+br- 0slo jectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between thejw;k)au:f ot. p e+2vim is 1.0 N. What is the magnit i p:vj 2aftwk.);+ueoude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How*q6k hl;3jhqthk3 g1e far apart are they?

  The force between a ah7bi u0vv2tf61weo /$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, exper 1t2r8tr7mqmu ience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between themu8 ttmrrq7 12m?

  Three identical point charge h ,9eww0bz+(xedvlc7s 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 the magnitude an97lc+ w wx,(be0 hvezdd direction of the electrostatic force which acts on the charge at the origin?

  Three point charges arex3,bm 2;g-:ib :i bdtf3hwy fx placed on the x-axis. A charge of +2.0 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 magnf: :2mx ifgdth-,bbi b3wy;x3itude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.1x*srer4z1q ni1yl t n.+;pozsd8 s; 2ns 5yra00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC sy *;p4zzr.n;1xi1 a 1dq2 srs+ornsyeltn85at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a seco:x h-hua, qsqtu 8yj8-nd 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 cqsy:-ux athjuq8 h-,8enter. 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); Q3 = 5. gs5osk6s6/:w0vycn m;tz g e90 nC is at (0, 0). What is the magnitude of the net force on the 5g5w69ssvkc/m0 6;n syt:eo zg.0 nC charge?

  Q1 = 6.0 nC is at (0.30e12c 7gn)ir c:fq+d 0pycn83otqtq 9g m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, qp qqt 3+ey)o2 0i9fdr7ntcn:gg8cc1 0). 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 vertices of an equilateral tnl fzk )ijc)tz)et /.j-d:jd6riangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which actzf : t)cl6 dnzdkj)tjje)i- ./s on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At;xmnd5 keajxqxp5 +1/ek 9oj) what point, on a line between the two charges, would it be possible to place a cha5x5k/ exj dpamq1+k9 xoj;en )rge 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 = k ;g,m5wvr*h d4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zhg*;, 5mwvdkr ero?

  Charge +2q is placed at the origibss syseg50:w9fa bny -m /;m5n and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the fobs; sma:w5y095yne mbs sgf- /rce on it is zero?

  A copper penny has a mass u qi 11(.pm6tzrtd/cj 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 th ys parh6r*3;j;yn)by m;b2cee attraction of a fixed proton some distance above it. How far ab3bmpbec 2sjn6 yyyr ;;ra;*)hove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncondy(2f8em/ ncg pucting threads which are 30 cm2m/cy(n 8 fpge 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 charge of +40e. What is the 6 yu*/ 3nz8i6d0 qj8kbcrjnshmagnitude of the electric field at a distance of8yb n jd0s/u*8 6i hzr6kj3cqn 1.0 m from the nucleus?

  What are the magnitude and direction of the;khg+ofw (ns 5 electric field at a distance of 1.50 m froh s nw+fgko;(5m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chpcl.: z:po(l darge. What is the magnitude of the electric field at the location opdzpl. (o:c l:f the test charge?

  A 5.0-C charge is 10 m from a sd0cvuui2 i:c2mall test charge. What is the direction of the electric fieluc0iv 2:ui dc2d?

  A 5.0-C charge is 10 m fromm+vw1(c6qzb ogi:/ex rn g2(u a small test charge. What is the magnitude of the force experienced by a2:+ 1iw(qrz6go vm (/b gexucn 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and arm9p8gbg fiff /qvgd 3//e:0vje separated by a distance of 4.0 m. What is the e vgibf9/dfg3v://qpfe g 80jmlectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sticn , f.9dm1d ousdq(c6yk and a -4.0 mC charge i9,s(o1u fmdyd6cq .nd s placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the c/wqsu 3-b x)7j1fws u0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on uu3c-qfj/1) xb wsw 7sa line joining the two charges is the electric field zero?

  Two point charges of +3.i gk/3 y z(i)jlj8bbx90 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric(jy9/ix8 jlg3b)bi kz field at the point midway between them?

  Three 3.0 mC charges are at the thrj3hjci5z 5qr 4ee 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 center of the squarej3q4j5h riz c5.

  Consider a square which is 1.0 m on a side. Charges are placedctdh qb;g v; kba7y+zo9 79gj5 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 djog5b+b 7ht ag7kv q;9yc9z;the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a jx u7 7 jrqq+040i;rdomgzzj-9 xmiv3uniform electric field. z vdx94-igijo;m0+7xz jqr3u q07j mrWhat is the magnitude of this electric field?

  A particle with a cha0k6q0 eh4w2kf:fbv e uqd9 6(qva/ rcyrge of 4.0 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 in an electric hz;t u x:16:aaw)wfna field of 6000 N/C pointing downward. uw ah1n:xw): 6;ftz aaWhat charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.1527ijds+gjl 40ua*gqa n/s 0ld0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of g sjdg*qas 74 02nil0ld/+ag juravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.04(v0xzz khzn 75n3w z,rym;ey mC. What is the magnitude of the electric field 5.0 cm from the sphere's syn (r5xwh;zvzmy 0k e73nz z,4urface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What0gqhj -3koi *ck+4m+cfrp3h n is the electric field 6.0 cm from the center of the sph+f0rc q-koh3j3g+mn4 hkcip* ere?