State the law of conservation of electric chargkrq+p,g mg13 ge.

  Is it possible for two negatij;:zw*jk0go5n8 z9ba zzx to/d70tux ve charges to attract each other?

  Is it possible for a positive and a negative c1x5a08yaidq,ufjqcs/*;c/ n 4l ya cfharge to attract each other?

  A glass rod is rubbed with a piece of silk. During the proca,fhwcg * cv s;f61tvg.-n6foess the glass rod acquires a positive charge and t;,fc t1cv6wngv- oaf*.g 6fsh he silk

  A proton carries a

  The model of the atowb0*kvti 5k0em shows a

  A neutral atom always h7/l ut kk -rlz.p;xc8 9k*tsfeas

  An atom has more eleczq6:9fdkv ;c)q yl sc,trons than protons. The atom is

  Materials in which the electrons are bound very tightly *dl4- fa5wp;sqa kpn;to the nuclei are referref ; swn*kqa d;plap54-d to as

  Materials in which the electrons are bound vcd6 c sye(v.fq kheb;q2cytf*8) 4k(xery loosely to the nuclei and can move about freely within the material are referre 6y4et fbqys* fvxq k8( ecd2k;)cc.h(d to as

  A negatively charged 3 nrax)5 :lq( ln,13lx7ctdsuxsns:i rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be chargnn3itrcq:1l 5u3 ):ls 7 xd,xsl nxa(sed

  Sphere A carries a net positive charge, and sphere B isc 5s v 8)4g hct,pls44zs0qwr)vzdh 7- w8caux neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is couwth ,sh 47 ac g 0s84))d-pxc8v l5sqvzzrw4crrect?

  How can a negatively charpl2v (zchkx2 b*tmz17ged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positi-/+d1k e z2w)zlavccxvely charged glass rod. Twa+ clzck /d1v)2xez -he electroscope

  An originally neutral electroscope isvkri *0-z;s 2geyw+6fa0 jpi y grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, theg+p6a;jwy zkvy-e *f0ii0 r2s electroscope

  A positive object touches a neutral electroscope, and the leaves s(c/uem 3ikql+1ohz3n(tn6e ,f;wt ugeparate. Then a negative object is brought near nunh6((wc lfze13gi t q t+;,komu/3e the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral m1)1w6v(z r8twim q2 wx* donhbetallic 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 charwibm8dxownh w)1*6t2 (1v qzrge on each ball?

  Charge is

  What are the units of the Coulomb constant r7wenos .lwtc+lpk;44q f.n *snb 1(5qv)cja$k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firstz)s26 ucgbz* qfv+g6a charge is larger in magnzzs) *2gufcaq+6 b6gv itude than the second charge.

  Sphere A carries a net ch vysz-c7 0nwd:4 cudm:v,;0buxt y(pqarge and sphere B is neutral. They are placed near each other on an insulated ta7d(wy,nyp mtbscv0du z4x u0c: ; -vq:ble. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force.4cy4 cvryz5 c9 If the charges on both4c5rv 4yc9 zcy objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces xjxpvb :h vtj x; p4,:duvlv06c)(rj+of F on each other. If the charges are separated by a distvu vx;dt: xp+rjjbh,v:x( 04j 6 )lcvpance of d/3, what are the new mutual forces?

  Two charged objects attract each othelq w-iq3 7i7uar with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, a- qiwq7 7l3uiand 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.tgy/azvdzafx mr* r33 w857vai3m oyh7sg6 )(0 m. What happens to the magnitude oh i7 my(3ozztvxgga5a7)f8 dary3* sv 63/rmwf the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a+tyy 8x/r aaw8 distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed nt8xa8+/yaw y rext to the proton?

  An electron and a proton are separated by a distance of o9p7 n2v-lw 18hdwdmp 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 mp-7w2 nvdwho 98pmdl1 closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secbz:9mb*,p jogyd; vp 6ond 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 of the square. What is the magnitude of the net electrosta9dg;j*ob, m:ppyv z6 btic 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 7w: tpr 9z2izitriangle. 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 magnitudi:zp9 w27tzrie 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 not a vezjrsi9y4z;2c6x.g,kw. r b *tt:g kmtctor?

  At twice the distance from a point charge, the strength of the electrizc* r)3mwbst4 p-2q- l1 kmsvfc field

  Is it possible to have a zero electric , 0u 2vrkua:ynfield value between a negative and positive charge a0 u: yn2kuar,vlong the line joining the two charges?

  Is it possible to have a zero electricu-d+e4nxtv q )v;z2ga-pur*f3+yc roe7ds 8u field value between two positive charges along the line joining the two chn +p 4vt;xdfzca7qyr 3)veuuoes-+g d8*2r- uarges?

  Electric field lines near psitive1xb h.l0d .( qaot:pnb point charges

  The electric field shown uza x0m(ww3sjri*f.tu*2. hh

  Can electric field lines interar72c fpt.h.lfb7 r*osect in free space?

  A solid block of metal in electrosm3j) f*l+w ymfa 9erz.tatic equilibrium is placed in a uniform electric field. Give a statea+rzf.3 f9mj)mle yw*ment concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gck +* kh 8 thu;lty2k2yaz4b4given the same charge, the electric field (E) midway between the center and the surfk4*kyy2tgut;lb h4+kc azh28 ace is

  A cubic block of aluminum rest9sygaz nk.2b:s on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning thbgy.92 kan:zs e charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric charg- (vg/byxilex f;z/ m4e

  A positive point charge is enclosed inoadg k1 f t;78:fzw:d+pxd0g)qqp zc8 a hollow metallic sphere that is grounded. As compared to the case without the fdg7 g8qaq;wzdkzc+xdo0t f: : p1)p8hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of condu/5 8 gypcxcci33jrm 7dsen+ *ectors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is 84dbrl9.w hkf$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic hvw58hqi-fi- d as a net charge of +2.00 mC. How many more protons than elecq -v 5w-if8ihdtrons does this piece of plastic have?

  What is the charge o ylst*0+dr0e uz- r bc7gu /0ju7p0vpsn 1 kg of protons?

  An atomic nucleus hasa5rs -pl v,);gwsa ns0 a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sucue1 .a-4qp6h oa9 p+dxk)qej dq*u(eparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. Whu p9puj. q haqceko+6d14deqx)ua* -( at is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m frwxg* 5,dn,w zuom a second charge, and the force between them is 1.0 N. What is the magnitudeuxww,n *g,dz5 of the second charge?

  Two 1.0-C charges have a ne;r ayd0o3:cg,m8l8jsal x, force between them of 1.0 N. How far apart are they?

  The force between a eg68bd+* )yek5bcr,x8biyjw $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expebilqtulh, h c 3 )8yphwl//5l5utc+/ srience a 1.0-N force. If they are moved to a new separation of 8q8/t) tcyl/l 5+ l5l3h/bipscuuhw h,.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. gm(c 6to1x;tw 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 magnituwcmx1o6 gt;(t de and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the k2l15bl (h j 7fcypd*cx-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 magnitude and direction of the electros1 cy52bjhkl(dp l*cf 7tatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2)ofue3ys0qf8h(1 m9vr fyz-e 6 ez.oe.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 th )fz36 h e(yzf 81oo-q0.mseferuy e9ve magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center ofv x)p2bo eq2rklnx;gcp p-8:6 a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.nk p)xb; q6rle ppx og2-vc82:0 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); Q3 =9 d iwl5vhy/4p 5.0 nC is at (0, 0). What is thy 9h pv/i4wd5le magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nil;h l.9aup,* f xmdom +n8sd4b 3qbgz4kd:)eC is at (0, 0). What is the direction of the netndx os p)dg 8b ef+ k*ml;uq4bz:,9.h3l4dima force on the 5.0 nC charge?

  Three identical charges of 3.0 mC arz9(t 9pyisk1l,fq1 :3o vg)q5c2om k7mqt mic e placed at the vertices of an equilateral triangle w)v919q fpcy q5mt7t g l21mmo:,okksziiq (c3 hich measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are s*l:ieo e;jzwx0kl0lg( , h ub1eparated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the b(wgie1 0j h;o u :kxe0,lz*llelectrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C char v0uq b)ec ny*k*ris,vp2.an 2ge is at x = 4.0 m. Where on the x-axis can a third c0vn.*)s,yna2 vkc*2u ipebrqharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where cant1hv1 k7)u:.y gtt lmo;0fude a third positiv11d fo: t0thlu)me v.7;ky ugte charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A to4v:h;h, (2jf h mnv5bwb9c/wxs plt4ptal 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 t1 avq gin8:hqn ur*2k-he force of gravity by the attraction of a fixed proton some distance above it. H*kugai q:r n218vh-nqow far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a comj/3y5 rhm avi1mon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until tmv5i/a3j1y h rhe angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What it0wqw0v ue*1 ss the magnitude of the electric field at a dista 01qet uww*0vsnce of 1.0 m from the nucleus?

  What are the magnitude and direction of the electrilrrhhk *a6g2el:/is5 c field at a distance of 1.50 m from :r52 rlgl6*shik/ehaa 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of .5wfbgejy:pk 0r*k+ r the electric*5 r+gkf0yj. kwpre b: field at the location of the test charge?

  A 5.0-C charge is 10 m frop)g .3h(c(uy55xl/sg xn jb 0sz/biapm a small test charge. What is the direction of the elec5(yssb in agc. 3jxuzbl)g(x/pp0 h 5/tric field?

  A 5.0-C charge is 10 m from a small test charge. What i,wn1cf i+pz3p o5yfe7 s the magnitude of the force experienced by a 1.0 npo+3ez1,f iwcn75p f yC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0- 6 ke)yj( r)te7vlv:fmoed,f C and are separated by a distance of 4.0 m. What is the electric field at a point y ))ofr(:7dle,ejv6-fekm tvmidway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chargelhje 7n3-y 1xp+o) ye8emit t7 is placed at the 50 cm mark. What is tx7 t hpye) 37ne 1-o+8lmetijyhe electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of 9gikdceo(-hzhn, 19 yn pa:b 5a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric dak -onc(: 95h p1eihy9bnz ,gfield zero?

  Two point charges of +3.0 mC and -7.0 mC arez4tfhr - ,*hkpfcu6j( placed at x = 0 and x = 0.20 m. What is the magnitude of the elect6 k*crfp-zfh, (4tuh jric field at the point midway between them?

  Three 3.0 mC charges are at the three corners o:2)t 0vov u4iq/7dws 1cexta gf a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field a 4txsvc7eqdg : )0owv1auti/2t the center of the square.

  Consider a square which is 1.0 m on a pbytcm*su khd( kg)35ws :/8 wside. 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(mwkcsg d)83bu5: *ysk/phwt, 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 when it is placed ie, 8:us plt.1mrhd (akn a uniform electric field. What is the magnitude of thi,8 sp eakhl.t(rudm:1s electric field?

  A particle with a charge of 4.0 aytcfzq871w acju0;r0 g0 4b smC 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 elec wm0- 3ogp3jcjtric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to bm 3cwgp03oj-j e suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is ppxglo3+u n6*h9a,emx5ucf-h 6 pptf9 laced inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and d*up 5tulx69fg,enxc 6amoh-f+pp9h3irection of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0m 1ekze9vdv3w3* w7ab ec9y p( mC. What is the magnitudeev(a3bwz1*m9ce 9 3ew7 kpvdy of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radt5;oj+8u87l umnytgv9xj:;rz n jj m6ius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the cey8z j6 jm;u:rjt9l 8nn 5mg ;u7otjvx+nter of the sphere?