State the law of conse)r :hkpylt :6yi.8 zmgi jv*e.rvation of electric charge.

  Is it possible for two negative charges to attract eac(fh5h2hsmuzyz; hr20+v eo( f rwm6,gh other?

  Is it possible for a positive and a negmbaj1isx8ok -im-u4a : 891 sf jf/abdative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glasston yw1q6s(n : rod acquires a positive charge and the :y61 won qsn(tsilk

  A proton carries a

  The model of the atom shows a9mf7 fu5gq+jk

  A neutral atom always hanhv hndg c-/o+:*s e-ss

  An atom has more electrons than protons.*x.c vqy2tc 2f The atom is

  Materials in which the electrons are bound very tightly to the nuc 3r oexqzoy,.gmz71/9 eg j*emlei are referred to y *., mezmezqxe go3/j7rg91o as

  Materials in which the electrons are bound very loosely to the nuclel39 jpb,mc. d4lewh4b.br v9fi and can move about freelb bb.w4p3fcdr9e,4lh9 jm v.l y within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged vj em+g.hl tq0 n1lvvd8.4d3mmetal bar. The end of the metal bar m8je.l+ n0g3dq lhdmv41vv. tfarthest from the charged rod will be charged

  Sphere A carries a net positive char1a 4dp(w5( f q nfcojr-ixb-j8ge, 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 grounded. Which statement is corq(pxd-o-nij 45 a cwf1b(8rjfrect?

  How can a negatively charged rod charge an electroscope positivel2 all 9lils./-dvuqn:y?

  An originally neutral electrosmjinba-2 o vrq y)5-x.cope is briefly touched with a positively charged glass rod. The elect-ja)n.vmy5 -bqro x2iroscope

  An originally neutral electroscope is grounded briefly while a positive)f 2en6bhy6mfly charged glass rod is held near it. After the glass rod is removed, t6fm6)f2 bny ehhe electroscope

  A positive object toucgrwkc ul9 us4(i9v1)xi* sz-w hes a neutral electroscope, and the leaves separate. Then a negative object -s kvu9 i )wws9c1gzil*4(xruis brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object isyb3;uijyu79 g 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 firib7 yu 9;gjuy3st 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 charge on each ball?

  Charge is

  What are the units of the Coulomb consc qou)/cj i,bchce 9.uxk3oxkmh62,1tant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is ) v;fxt x*pr:dlarger in magnitu*px d:f);xvr tde than the second charge.

  Sphere A carries a n*lrg rt7xs*7jqf1fn :7 a5kt fet charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the eja*5 7 fr nf1fxq: ksg*77trtllectrostatic force between them?

  Two charged objects attract each other with a certain force. If the3dph0n1sxmq 8c; 9akk charges on both objects aq3 8xd c9mahkpsn0k1 ;re doubled with no change in separation, the force between them

  Two charges are separatli 5tkgl4j6(g ed by a distance d and exert mutual attractive forces of F on eacgj5t64(llkig h other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forcoq hd wu:k*dl7di*b (*e 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-fok *q :7ho *ddl(*idubwurth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happeec 3m(x(gghzy5pf 0y*ns to the magnitude of the force on the proton if a second electron is placed next to th0xhem* g(yz 3(fpcg5y e first electron?

  An electron and a proton are separated by a distanc8 4u m xct3)ccr6hz i )jjq3gutx728-tghrti8e of 1.0 m. What happens to the magnitude of the force on hh-3 tx37) tgrirzuj)qmuc6xc888 tt2gj ic 4the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a dis a 6fpcaug-tn22f9 i)xtance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to thf i6 9taua -n)cfxgp22e proton?

  A point charge of +Q is placed afdd pva8 h+pimlv l(y/9( sz1::x5ktgt the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed (dv+lhys (91ztd5 ka:8:lfgxv /mp pi 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 atnjv: +82yvzm 1ppxp(t -k)i yj the centroid 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 1:i2 8nmtvpp-+ jvyjyz(p x)kit. 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 not j4 w9e+an 9 dba zb7cwuq+u+a/a vector?

  At twice the distance from a point charge, the agd9rd7;h85z q bgp0r ,hld*;o d.jn4x4yrigstrength of the electric field

  Is it possible to have a zero electric field valucc e*-u4+gzk fy2w46n tsc 9 al6a6k2mtey+zhe between a negative and positive charge along the line joining the two cha gkthy4t6zec+a 92 *+ u m4lfnaksy6-c c2ew6zrges?

  Is it possible to havyf4 lbhtaz2fx8g g9/)yx7 obkj7li5 :s)rv(p e a zero electric field value between two positive charges alonj9 i lvb (4 y:5kz)la7xyghtxprf)2fo8b7gs/g the line joining the two charges?

  Electric field lines near psi9+ok 8o(iwqn hb4iiy (tive point charges

  The electric field showv1wk3g2s:u i.j3 ound n

  Can electric field lines intersect in freyl m73-zij -ose space?

  A solid block of metal in electrostatic equilibrium1zhl3d: w7rmdiz5:h jtjb5g/ kt7 :ib is placed in a uniform electric field. Give a statement concerning the electric field in the block's intej5 gjhib1d/:l w7 ib:z kzt3 dt:hr75mrior.

  If a solid metal sphere and a hollow metal sphere of equal diameters l1gly1r*e b-z are each given the same lgrz-bl 1y* e1charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a ev)y7z8+ (sk2jx n;q1pwvgnpuniform electric fikv q8e1swz )27n+yjn;v(pgpxeld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic lh7ca323 l2prc,srdu6v3g xa equilibrium near an electric charge

  A positive point charge is e, pds hbk;2hqv 18s1jhnclosed in a hollow metallic sphere that is grounded. As compared to the cav8jh2 ;s1,dbk1 hq phsse without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in staw17hqk 0vdi40j dzsu+ tic equilibrium.

State Gauss's law.

  The charge carried by one;qw c0juitwet ts*a- 7m(cr+a01 .iul 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 of +2.00 mC. How many more protons than elbt/9pw 7j+aos 5p,hvzu xk4d9 ectrons does thisx,9jdzp5t /4ubhp+97kawov s piece of plastic have?

  What is the charge on 1 kg ofm/ho (qj:w a7 vtupfa0y4a.(v protons?

  An atomic nucleus has sj. 9s96pzok zmo7 ul)a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by fnn/i): d x+0yoefi) k1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwee)f/i0 +y )o:fneikdnxn them?

  A 1.0-C charge is 15 m from a second charge, and the fobkoa5imz )u bn1w,h0 )pyt4r2rce between them is 1.0 N.t4a)p2mkiu1 ) z0,by 5brh wno What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are . e5eyd0gdi;r ns.b(w they?

  The force between a rm7+ 3m :4qzgljlukrl d2u1.a$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially /9oso if.cm7p w0os-u2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force buso m./79f c-w so0oipetween them?

  Three identical point charges of 2.0 mC are placed on the x-ax229w(1 :o u3ga i1ofkayhvfntis. 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 directio922 fvgaau 1thnyiwook (f :31n of the electrostatic force which acts on the charge at the origin?

  Three point charges are gqx3iu6+j05mzcfe (wplaced 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 magnitude and direction of the electrostatic force which a0j5mec3x+qw6g iz(f ucts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x a) zh1m k9n,x.r p,.wdpg3kkm = 1.00 m; Q2 = 3.00 mC ,,kz)adp3xm.gpkmw r9n 1kh. at x = 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 cen av/cb/,wtw)m r ld7*qter of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force that acts on the center charge if l)wmb ,w*qcard//tv 7a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = djv bj2: oz 2oz1t,+pk-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the mabvt zpjo j2zk1 +,d:o2gnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 6-q0qqw)m ksj0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0qq mj0) wk-6qs). 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 *n98 kv; dj:35 er,s txd2qo +o)j5pco wslsbsof an equilateral triangle which measures 30 cm on a side. Whedk)j,bs o8;jps2slvs9 3q+crxn*o 5ot w5d :at is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, whichijnxz.lo( qmj1 )d 3k(xb3+a g 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 -Q such than1bgq i (x za)3mlkod(x+3j.jt the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a zg5sn+rbtd*, +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net forbgzn r, t*5ds+ce on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at 68; 1 1 kpekyilz*gm(rajw rp0x = 2a. Where can a tlkr (j01e; wa p*prigyz68k1m hird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A utwuy;ur7u.5.+w kiwy81k dztotal 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 f e.7ky/pg7qm nbu )9l 6ehmaw7orce of gravity by the attraction of a fixed proton some distance above it. Hownep7w7q yblemh 9)uk/agm 6.7 far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point b8 qb;3sl3aw//adugs4sr 4m vrp:m yz9y nonconducting threads which are 30 cm long. Both are given iden8p drqw/43s:g3mrs bys 4a/a9mz ;lvutical 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 twlt+d7xazly*5a0q1qr ( i: xyhe magnitude of the electric field at a distance of 1.0 m from th5x qaiqyxa zryt*l0d7+ :l(1we nucleus?

  What are the magnitude and direction of the electric field at a dista1 9yitw hfj :6zuxawtr n9mp-qi+*.9y lum08pnce of 1.50 m from a 50.0-nC charge?9yq9wiuhti1nm+p j : yx- mt w 8.apr*lf9z6u0

  A 5.0-C charge is 10 m from a smalln0toro*7w+ (onzoy*( )buwvrxw kn /: test charge. What is the magnitude of the electric field at the looo 7r:nt+yk(b/wxovo)n*0 w(*runzw cation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directiob avg+/ r7eoj17 e+alelf2ilc2+sj a1n of the electricalgf e/ r2ia+ea+cl1j1e7+jls 7 vo2b field?

  A 5.0-C charge is 10 m from a small test charge. What isc 1d 8oev: t(do60 kclf*3akdv the magnitude of the force experienced by:l 6 eovodf81ca(vkdt*k0cd3 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 separa jap9* )+huuvnted by a distance of 4.0 m. What is the electric field at a point midway bea n*uphv+) u9jtween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a met( 71d9j cjorux*ojx- cer stick and a -4.0 mC charge is plaujdc-79jxc(*jorx1o ced at the 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 charg3st 6a; y*huoue is placed at the 50 cm mark. At what point on a line joining the two charges is the electric fieldt*u3ou; hs6y a zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. Wh-eb8h/ok.:jrt(q kb5a q u- nrat is the magnitude of the electric field at the point midwa-(unbr5jrk /e.b k:a q-q8oh ty between them?

  Three 3.0 mC charges are at the three corners of a square ofy3fm2,e(jz7qqm+tx;3jpa b ly mww3; side 0.50 m. The last corner is occupied by a -3j;xmey (p3qm,ba7 2 yq3f j3twwlm +z;.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.+x2xyus j .ojrgo- b .(gawgha7nf2/:0 m on a side. Charges are placed at the corners of the sq7 owsrf(uj2j. 2yag gh+x/x:n.go -abuare 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 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 uniform ewi85 rr/ac (btlectric field. What is the ma c( 8aitbr5/wrgnitude of this electric field?

  A particle with a charge of 4.0 mC ha(cw) gnvzi9so z8(2uis 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 placedg krye qh+)82uc ze q)ce.(fn( in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be+.k)cqe hc (er(u8gf2e)y q zn suspended?

  A foam ball of mass 0.15(rz ;0pqhzpm7s,l x e+0 g carries a charge of -2.00 nC. The ball is placed inside a uniform p+q ,l7rz(;s 0emxzh pelectric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries(dd1r oi1s7kl a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sp1dd1ok7ils r(here's surface?

  A metal sphere of radius 2.0 cm carries a cha9uqgfay 6 u3v hccv q6,52zd(bz6ur /m tdu-6hrge of 3.0 mC. What is the electric fa q96 u65zhdygdqcvc -m2t rvzuub uhf/ 36(,6ield 6.0 cm from the center of the sphere?