State the law of consy ./g hl:gnot)ervation of electric charge.

  Is it possible for two negative charges to att.p pwxqw28dh3 ract each other?

  Is it possible for a positive and a negative jh* tld k-ki9xn. xe6/eyw):z charge to attract each other?

  A glass rod is rubbed with(*ex z:gr*kgye (nx5z a piece of silk. During the process the glass rod acqux*k(5*:ngg r ye(ze xzires a positive charge and the silk

  A proton carries a

  The model of the atom sho6p3qk1h zes9 dws a

  A neutral atom always hasmmj88 jvwn(0 q

  An atom has more electrons than protons. The b5,/kc3 lylxbw*+bzd atom is

  Materials in which the electrons are bound very tightly to the nuclei are 4 :i9ff w)yffmylf :t1referred toffyf)i:l:wmt fy9 1 4f as

  Materials in which the electrons a50ncdn ;, .4qzrjf omxre bound very loosely to the nuclei and can move about freely xdnqj fzm;on054 ,.c rwithin the material are referred to as

  A negatively charged rod is bro-1.kyp55jqsxv 2tsu m,yx;aq ught near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will 1 5vq2 ps5ujxy,y-mq xkst.a;be charged

  Sphere A carries a no)a8 wkc 3oz6,c u0l:bg(q/wgaaxde4et positive charge, and sphere B is neutral. They are placed 6ozcu0wag(4/l, c) g3o8dxb waeqa:k near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelynpsj. xz:gc (vy99o e:?

  An originally neutral electv :lx,js;dl1 iroscope is briefly touched with a positively charged glass rod. The electros;jvis,x1 ldl: cope

  An originally neutral eeh 1zfr-ot/ i6lectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the elh/i-z tofr61eectroscope

  A positive object touches arcmg .a 3itp,,.pw(lh 5 suoj8 neutral electroscope, and the leaves separate. Then a negative object is .,mc .tsu5l(wgr8 3jiopaph ,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. y84,jao0 dwaf atj.m4 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 negative object. What is the final.wf,8yod0ta j4 j4m aa charge on each ball?

  Charge is

  What are the units of theorr- s2fbil3g, tb:1i Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cha i1hk) pkfyv1m8ft+(o pa,(w arge is larger in magnitude than t a((pf811fo)p tv+hkyam ,iwkhe second charge.

  Sphere A carries a net charnj i5qc:(a y9uge and sphere B is neutral. They are placed near each other on an insulated table. Which stat(ai95yq c n:ujement best describes the electrostatic force between them?

  Two charged objects a69/3a g6(ycjat 6z wa 6fiaypattract each other with a certain force. If the charges on both objects are doubled with no/atf9aw z 6( 6ig6pacaja63yy change in separation, the force between them

  Two charges are separated by arxb53rl2hii8i+x/ vvd m;n7q distance d and exert mutual attractive forces of F on each other. If the charges are separated by a disl8xh v mi/x+;i5 37rbrqvidn2tance of d/3, what are the new mutual forces?

  Two charged objects attract each other wituoq18 dl8-dpnt h7 5keh a force F. What happens to the force 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? The fp-8tkn d1uo85 d he7lqorce is now equal to

  An electron and a proton are separated by +l xsi4/t+(hkn ; htnx/jw3s q+vky-ba distance of 1.0 m. What happens to the magnitude of the force on thevh nkhj;4+i/nsx s-+lttqkby+(x/ 3 w proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m.if8eo-l+0cx0hi -xpy What happens to the magnituiciex0- - x0p hof8l+yde of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Wh4as3 njj sh15o.rh;y rat happens to the size of the force on the proton if the electro5 yons r3jas.;hr41hj n is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a t0c 10gr .r agcyrf*n/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 acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of10rrg0f .ta*yrcng c / 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 er;jc*w( +c yw-63x7mswts ds kquilateral triangle. When a second charge of +6d7ss m wcr(twy* k 3j+;xcsw-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 charge of +Q placed at one of the other vertices?

  Which of the following is yk p5q1 *gxw0lnot a vector?

  At twice the distance from a point charge, the strength of the electri,hq/w/:aiu gjy viq3s3a :z s)c field

  Is it possible to have a zerpg:-n1 qmu .bno electric field value between a negative and positive charge along g-mnu. :bn1 qpthe line joining the two charges?

  Is it possible to have a zero electric field value between twgav zq,ke:d zxti9)/t7g.a2 so positive charges along thetgzts2g iev/ k .a:xq d7)z,9a line joining the two charges?

  Electric field lines near psitive poiw r8hmu0en96flwt* f+nt charges

  The electric field shown q1 iys1/lrgh57jxh q1s)dx0q

  Can electric field lines i)8kq7v:fvm y7 zr 0aqcntersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in 9iilrx1)d8 fb-pb9f va uniform electric field. Give a statement concerning the electric field in the block's interiorfpilfbi-)1r8 d 99v xb.

  If a solid metal sphere and a hollow metal sphere of equal diamete()j5zk3 h cbhqrs are each given the same charge, the electric field (E) midway between the center and the surfzj)( qk3 hb5chace is

  A cubic block of aluminum rests on a wooden table in a region where.2 p;gh7som,hpqz5 n s a uniform electric field is directed straight upward. What caz.; sn5qpho,2g7ph msn be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an ele;krvlxj2cd7 *ctric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grouni2a lj +)/z62y8f/z plb9y1mdm pobwu5+leokded. As compared to the case without the hollow sphere, the electric field bk ldmlw/9 j51lzu/fy 8a)oppoey6 z2m+b+2i at a point directly above the hollow sphere has

State three properties of conductors in stat*ku:v b;* hy/vbfhde 5ic equilibrium.

State Gauss's law.

  The charge carried by one electron i2 v :u-h9fml9qiao /mvs $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic hr7)c w w,rte8yhr6 bn4as a net charge of +2.00 mC. How many more protons than electrons does this piece of plh)n yt ,rb8 rec67wrw4astic have?

  What is the charge o 82db 0 d6ngzqx:gs/yn lv08mjn 1 kg of protons?

  An atomic nucleus has a(zia l-t 7yq1e charge 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 value/tcz bcuppljr+ :.h )1s of 2.0 and -4.0 mC, respectp:cp1)+rt uj/ lc bzh.ively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m froa7d .tnt(qz2gm a second charge, and the force between them is 1.0 N. What is the magnitude of tnzq.g2adt ( t7he second charge?

  Two 1.0-C charges have a force betwmxcpt53 h8b3 yeen them of 1.0 N. How far apart are they?

  The force between a iq7+8mqxch-h /kd,li$30 \; mC$ 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 tp gr. .f3osmre9dc1)they are moved to a new sropm .tde.1 f)93gscreparation of 8.0 cm, what is the electric force between them?

  Three identical point 50ujwv, z/zxu7xdbd9w d q d6.charges 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 th, w0 dxv59ubdd6.d7/wuxzzqje 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 charge2r/,(nz e7nzj h/bt rp of +2.0 mC is placed at the origin, -2.0 m C n/zzejn,/( rbp7rth2 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 are located at the following positions: Q1 = 2.00 p9jsm :x*;frymC 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-m*9fpmx: ;r syjC charge?

  A point charge of +Q is placed at the cemfit4 sa2g6tz4j1q7 m cmva;9 nter of a square, and a second point charge of -Q is placed at the ic; zafsmt412t7mq9 ja g 46vmupper-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 lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.7 ptb 65ete 2/zjjty)d10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC2yp zet/btd) 6jjt5e7 charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.1 kbj3-k gqm ihz;pw(310 m); Q3 = 5.0 nC is at (0, 0). What is the directihqwbm;ki- jzp gk33 1(on of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertik 2++tbhnt0mq (khpmn t83n q7ces of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the e730 qp(tb+qnkhtkmmnn h28+tlectrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, nkjtn3mmz11fya y)f/bis: l r9:0h, ywhich 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 -in3alf:fh/n19 1ys0k t r,:y jmb)ymzQ 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 iswp21u3+ v jl3fk8) iigwf,ei(q pep2 d at x = 4.0 m. Where on the x-a+w,elfu(pwipk )q i1 gi 8e232vdf3 pjxis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed atx7s uzu*zo fyi-; b78cbs gr*b( ;+ijm the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placedsiu- cubb; z7g ioz*s;j8xr(b +mf*7 y so that the force on it is zero?

  A copper penny has a mass of 3.0 gehkr, n ;e*3 jb4y:aabio* w)i. 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 w .b91( cgxfxbby the attraction of a fixed proton some9f(w1g. b xxbc distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hungwx/je+) 5tn zzm12 b7n pdf.kf 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 anz.pwk7zn/ 2bmd jx1f+)ef5tngle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge wnk1/vpi tw12 of +40e. What is the magnitude of the electric field at a distance of 1.0 m fwi 1p/v2wk nt1rom the nucleus?

  What are the magnitude and direction of the electric field at a di74pjb2 s gu+6 skwh7osstance of 1.50 m from a 50.0-nC u4+7bp7 gso swkjs h26 charge?

  A 5.0-C charge is 10; dwjwcxf pc2:j7 f(;d ,vge,m m from a small test charge. What is the magnitude of the electric field at the locaj:pw, g2 mff;7jd,ved(;cx cwtion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Wgd1xek si4/9l hat is the direction of the electric field?lk1/id9 4xsge

  A 5.0-C charge is 10 m from a(hq :)*haubq gbyk3i8 small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of th(q)ihh:ab 3y8buk* g qe test charge?

  Two point charges each have0 )(;vrmz2tobzb:76 af ch qru a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a pu67:bh(;a2z0rfc mbzv)q otroint midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic9*b58 q4zsz,cs c-0uj qgrpmo k and a -4.0 mC charge is placed at the 50 cm mark. What is the ecb5r-ps9 cq0z,qs jg*u om 84zlectric field at the 30 cm mark?

  A 5.0-mC charge is placedt3a6f nkn) 6k p0lsmj* at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a li3n fl k0t)msj66n*pka ne joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.2.6*phoun 1jdc0 m. What is the magnitude of the electric field at the point midchp nu 61o*d.jway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Theu r)l1x .1vdmc last corner is occupied by a -3.0 mC xu crl)vd11.m charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on*.nx;rn*)mruu.far x a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1,fuxmxr .*.) au rn*rn; 1); +3.0 mC 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 oru7bldhr kq :n*s6 gndw.4zp/ 9b-n8zn a charge of 5.0 mC when it is placed in a uniform electric4 d rnnh7ks-n b*p z.z8r6ld9/gub q:w field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC hu :- ,llqe 7-wemgo/qxas 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 afs8hym ) x-l*kn electric field of 6000 N/C pointing downward. What chargem8 sh*)-xflk y must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a cf:u ai5k:)+ffyt i :ysharge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of )ati5:fyfi y:f k+su: the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is +th -ijvm09ygthe magnitude of the electric field 5.0 cm from the sphere's surh-yjm+ig 9tv0face?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the kk+ *p3 dem6kmmfxltml2 b.:5electric field 6.0 cm from the center :pfkdbk xtm kl2m6e3+m5.l*m of the sphere?