State the law of conservatig6hr*p:,f 0olymm: mton of electric charge.

  Is it possible for two negative charges to attract each ww3)e/q wq+qe+3; y u *c +mwljeyrv8oother?

  Is it possible for a positive and.a0g cl,t ngx3byo/m. 7.li cn a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rhb1w 2z,v+w:nmj-i jfod acqu+1j,bwi n-mwfzv:2 jh ires a positive charge and the silk

  A proton carries a

  The model of the atom shows xz(by d ggj047a

  A neutral atom always has c(3qt9)ibz 541he*capirmnl;l n3pq

  An atom has more electrons than protons. cnv)sxm:joq:z,8 vz+ The atom is

  Materials in which the electrons are bound ve frvw1,i.9xqmof8o/rry tightly to the nuclei are referred t1.mrqio, /x 98rfwv foo as

  Materials in which the electrons are bound very loosely to the pmql8 ko(n: t+f 7bia0nuclei and can move ab8po t 7(mliaq:+f0nk bout freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metalo8co y 6uas14d) ezb0e bar. The end of the metal bar farthest from0oe 4)e6a8dz 1bu ysoc the charged rod will be charged

  Sphere A carries a nyc+r; bddpv6. et positive 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 groundedvr ;bcy6 dd.p+. Which statement is correct?

  How can a negatively charged rod charge an +dwrea-.n k77noip+3lb5 myf electroscope positively?

  An originally neutral electroscope is brief, yr6he3m ewz fv.;(iak//w qqx; zdj(ly touched with a positively charged glasseq 6qx3mzkh jwri/, ( z;af.(y;v /wed rod. The electroscope

  An originally neutral electroscope is grounded briefly whytl7 xncb ry4fs4 h4):ile a positively charged glass rod is held near it. After the glass rod44f trnh ysy)blc :47x is removed, the electroscope

  A positive object touches a neutral electroscope7xdluy+m r56woxg5 jdq9 j 5z., and the leaves separate. Then a negative object is brought near the electroscope, but dox.wrju55j6dyo q+zmx 7d5g9les not touch it. What happens to the leaves?

  A large negatively charg55kfb1ek * dnbed 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 db*5keb15fnk 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 o i6zr -o7tw57 5loyvsof the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is large0wvkx*2c0 guvc; s w eyi9h)q2r in magnitude than th0)xs*we wc2cqugvhi; y0k v2 9e second charge.

  Sphere A carries a net charge and sphere B x7 m)v* g:l nee(ylhin 0i64dwis neutral. They are placed near each other on an insulated table. Which statement best describl0hgim ( xnlnvd)eyi 746*w:ees the electrostatic force between them?

  Two charged objects attract each other with a certain force. If thxcyllxks,m1lh491o/-j h f 2re charges on both objects are doubled withy41h1 m fo l/,xk-cs2 lrl9jxh no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive for4 uuy1;ups(t: -jjhci )vks 1hces of F on each other. If the charges are separated by a distance of d/3,;vy 4( pu)h1:-s1cjkjtusuh i what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens+ngkgbr;1qa r )e3*tr to the force betw 1)e*;knrb gra+ 3rtgqeen 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 distance of 1.0n9pp drd 2+yrbcbqe9sdat,;ar712j : m. What happens to the magnitude of the force on the proton bc7 9qb,dsppaay j 1 rn;ddtr2re+9:2if a second electron is placed next to the first electron?

  An electron and a proton are separated by sw w gls h0cv7ets5nkt0n.iu1+o f7,)a distance of 1.0 m. What happens to the magnitude of the force on the first elc07slgo + 5 v1ek0w)s. inun,hfts7twectron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance or 4 g;.hli9051r*djb uiwt(a.lsp ywqf 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to tat *l(s wp10 ;i 4d.yjri5hl9rwbu qg.he proton?

  A point charge of +Qghvto 1o4ixi( * wm2b5 is placed at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is obse5hm b(t o41xw g2ioi*vrved 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 cent rd 9u cru2r.2xan0ofx5d)ubgxo)b 53roid of 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 the force that acts on the center charge due to a third co r.ur fdduc9 gr) 0o) ub5xxxab2253nharge of +Q placed at one of the other vertices?

  Which of the following is not a v, gqfn3j rfs--c2kso) ector?

  At twice the distance from a point charge, the strenz 6oh(:wpgrj u n/zg57gth of the electric field

  Is it possible to have a zero electric field n73xb 34rcse2wk zz* cvalue between a negative and positive charge along the liz3s2cexw 3 *4zr7nkc bne joining the two charges?

  Is it possible to have a zero electric field value be,aaq(who 6 wq1tween two positive charges along thow1 qwa(,aq h6e line joining the two charges?

  Electric field lines near psitive padnfzs(*tbse cyy;po* +175roint charges

  The electric field shag tf,r,c96wuown

  Can electric field lined8r ) an9qze/ps intersect in free space?

  A solid block of metal in electro;h2 a, i0qvt5cz boq9ceb v8;jstatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interhvb5iqa,c;0;j2 c tb eo8vz 9qior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each nq( x t/a dn(dy2/rmq)given the same charge, the electric field (E) midway bat (y2dq dn)n/q/(r mxetween the center and the surface is

  A cubic block of aluminum rests on a wooden tvpu+mwo+p+nc 7a tqi- i/og)+able in a region where a uniform electric at +cvi nwmug-)qop o/+7p i++field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near anx(lz. kx.v,:b (qg 39j zt1upnz(jgxq electric charge

  A positive point charge is enclosed ihg5m / blv-h6;qgrng0n a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abovehv0g/6- hqn;rlgg bm5 the hollow sphere has

State three properties of cojl23rm :q9hrmlc; ( conductors in static equilibrium.

State Gauss's law.

  The charge carried bywtf: 6s 7gzwx(mivzdu 5a4rx5a)c 7)t 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 h ukj5/uh*c:rh as a net charge of +2.00 mC. How many more protons than electrons does this piecec:h kr5j hu*/u of plastic have?

  What is the charge on 1 kg of protonshqza/q5n ols6 87y/ql?

  An atomic nucleus has a charge ofm uc;cxqhr1 u.m f.chxu0h)d;( ka /a: $+40e$. 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 ans is+mm): ip1ed -4.0 mC, respectively. What is the magi se1)impsm:+nitude of the electric force between them?

  A 1.0-C charge is 15 m f1sf96nj/a zcb0v4)fut -m lvgrom a second charge, and the force between them is 1.0 N. What is the magnitude of the secon69fjsvcnb zu 4-f1 mta/l )gv0d charge?

  Two 1.0-C charges have a kh:tk p3a (b;cct s*q/17hh trwtegps /5i;q*force between them of 1.0 N. How far apart are they?

  The force between a x u + .1lp6xqhx/cqmp-*rw/nm$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expeo /docwls:(yzdzm-ww1/iu -: /vf4dqrience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the eleq/4w/:s: c-zv- mz w1wdyiu( ool /ddfctric force between them?

  Three identical point charges of 2.0 mC are placed onsh3zr(5n4 e wx 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 and direction of theh (es4 rx5z3wn electrostatic force which acts on the charge at the origin?

  Three point charges are placed on t 9pt*stk e7rnl9s:vw( he 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 magnitud:pv(9erst * lk nw7s9te and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the fol t;vf,fs vf ,oyg-:if)lowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x f,f ) fvtvfs,;-:igoy = 0; Q3 = -5.00 mC at 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 squareg16yw6a s/i fw, 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 1sw gfy6a6w/ithe 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 = 5.0 3r/h58xy 5yelm-qtsqof8 8tq nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC chargeq3qyfm-t8s88 r5xt e 5yh /oql?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.01d* zmay smzs e9x1;+g(jzs 2-1npzlt nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net fx m1z(zplmy +sg; *11dn2seza9tz-j sorce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an 5 eya6wveo*y4 ,fge.x equilateral triangle which measures 30 cm on a side. What is the magnitude of theeg. x5ve6yoyf e4w*,a electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are sp +xvxad)i2-8yr u;o4ocp6fld ( fe1veparated by 3.0 m. At what point, on a line between yvu(cd)e2+r o4xo p; vx f18dp-f6i lathe two charges, would 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 charge is 7;e cpyq5x*ux at x = 4.0 m. Where on the x-axis can a third charge be placed;7x exy *cq5up so the net force on it is zero?

  Charge +2q is placed at thddg(f c 6ze0q+e origin and charge -q is placed at x = 2a. Where can a thz dqd6gce f0(+ird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3o pa3zj ,n 7;-.byuvyqjk bf-,.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 the attraction of a f cl1k (aq9 wkpil3a0owxj-(/tixed proton some distanwixok qc k/l31a0tp( jwal(9-ce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by 4e1pm68u1 zmefshq;ul q:nn :nonconducting threads which are 30 cm long. Both are given identical charges, a sepn1u:m 8qu6e;nmz1lqf4h :nd 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 magnitude of the x3r/ 2rq :pf2igqh (ngelectric field at a distance of 1.0 m from t(ipqr3:/n x2qrfh g2 ghe nucleus?

  What are the magnitude and direct i *m;dj 38poea+7j-dtmvc.-4 l,kr fgats9 peion of the electric field at a distance of 1.50 m- a , ie4-9r;kpo d 8mcgvt+.7dplme*s3taj jf from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a smallf;(z0e7:30 eu5ctcpv)to ; nj ok ghdp test charge. What is the magnitude of the electric field at the location of the test 3te7g ;noh :)uk tfezd0o(j0cp cv;p5charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directiowf k2,if34m,fl s5mnxts l e+(n of the electric lx mk23em( fl4,t w+ffn5sis,field?

  A 5.0-C charge is 10 m from a small test charge. opyak*+a.:e.dlh/z r What is the magnitude of the force expea*/aodheyk l+r.. zp:rienced 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 separated by a ib lvbr x31o qhs+5t41 zb50cmdistance of 4.0 m. What is the electric fivm4 50 qc h1 otz5+3lxbibb1rseld at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm maw67i*sh23 lt *ow eccsrk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm markl*iow e2ct 3scw7 hs*6?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick o9enpesh7 2k +and a -4.0 mC charge is placed at the 50 cm mark. At what point e 9okp+nh e27son a line joining the two charges is the electric field zero?

  Two point charges of +3.0fdc)d:c, wj7i mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midc:d)w,ijf7 cd way between them?

  Three 3.0 mC charges are at the three corners of a square of side 0cj(psd) 7+leh ih+9dx .50 m. The last corner isei+hd)+dlx p9ch7(js occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square whic+y;y;r3p vn dkh is 1.0 m on a side. Charges 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 mC at (0, kny;vd;p ry3+1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 532rafwr0 ak.n;p lf9;nqs c2 i.0 mC when it is placed in a uniform electric field. What is the magnitude of this electric fkn wf;r3.lq2i9;a2s anr f0cp ield?

  A particle with a charge qiu. ;d(q hre;8cf4os 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 elecwqkz1 z5o7b y-v-b- vmtric field of 6000 N/C pointing downward. What charge must be placed on the vvkb1y-bzq-m oz7w5- ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charg+)s aceubwe (n .q(3w8-gqiice of -2.00 nC. The ball is placed inside a uniform electric field, and is sui-. a3 c(8qc+ bnwiq(seugew)spended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 epi,;)0sl uib cm carries a charge of +2.0 mC. What is the magnitud;0l)ub, iis pee of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 m l +m0x0 v2lzmi.nuw9yC. What is the electric field 0w lvym+lx9u.i2 mzn06.0 cm from the center of the sphere?