State the law of conservation of electz.72 whs lp9zcr 7iprbf+x;r6b4e9w o ric charge.

  Is it possible for two negative charges to attract e7ucp pdc69 g(:e( bedxach other?

  Is it possible for a positive an 00toni4drv3t7ofobj/. /uc ed a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glaxakt 0 n)+d2gwj6e 8s tv6(pfhss rod acquires a positive charge and tne v ajtf pgstx+0dkw(86h) 26he silk

  A proton carries a

  The model of the atom sb oudwbye2,3(mq2t6x hows a

  A neutral atom always hask y6lsq /f;fc1

  An atom has more electrons than protons. The )- d 7c6ele5fxvph0d(ux 0lpuatom is

  Materials in which the elev(l82af: z zcqk8dt;kp 0es/nctrons are bound very tightly to the nuclei are referredkpc td8e:2;ka s0zq/f( z vln8 to as

  Materials in which the electrons are bouxudg:m11nyl+3zhii q, r 4jz/nd very loosely to the nuclei and can move about freely within the material are 4z /: u3jy 1qnrgxm+ 1hidli,zreferred to as

  A negatively charged rod is brought near one en r4gv mb 206mbvkubh8(g64hajd of an uncharged metal bar. The end of the metal bar farthest from the charged rod mjkbv64 h 0hbvm(4 g8ur62 bagwill be charged

  Sphere A carries a net positivev sawz.bhs 8/cehbf- (sy.h zmbxfm- 6t +6c+3 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 grounded. Whichtb.-zfw h-b s6+ 8hhz.(vamfmc +/y sxc63bes statement is correct?

  How can a negatively charged rod chas(fb6fiy / ifg*fuq ;6rge an electroscope positively?

  An originally neutral electroscpq+ro::,31k7wthgg r n9u g ddope is briefly touched with a positively charged 7pqg:o uw1rgr:k+3h 9,dn dtgglass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positivelyy/-hnagj zdqq: bo)-ysd59cj *czc00 charged glass rod is held near it. dcs bhq*-)/0nqgoa-zzy:d cj 0j5 c9yAfter the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the*rmz +kloqq ek*8: t)m leaves separate. Then a negative obje*tz*qk:8mk+lqm) orect is 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. A ni:(jl8.cbcryus9 e y(eutral metallic ball rolls straight toward the object, but st b:ei(y8c ( urcjy.s9lops 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 charge on each ball?

  Charge is

  What are the units of the Coulomb ox qgp4/ bh4f*constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. gr-9mt2.bf w fThe first charge is larger in m9 bf.gr2f-wt magnitude than the second charge.

  Sphere A carries a net charge and sg8wjfyog 3o+. phere B is neutral. They are placed near each other on an insulated tabljg .woy38g+o fe. Which statement best describes the electrostatic force between them?

  Two charged objects attract each mewcjr ..t aqf93b m,)other with a certain force. If the charges on both objects are doubled with no change in separation, the force between fm w . 9crm3q.e,atb)jthem

  Two charges are separated by a distance d and exert mutual attr 1-t26 9 gyah)pslhkghactive forces of F on each other. If the charges are separated by a distance of d/3,h2hag k 6)s1-tp9hlyg what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the (; /f0ffq bnjeforce 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 force is now 0qnjfef (;/fb equal to

  An electron and a proton are separated by a distance of 1.0 mmdi2 i+d)9zq6stkoy;x gx- 8)qif;ce. What happens to the magnitude of the force on the proton if a second electron is pla6cm+fxzd)e 9i8;g;d-qt) qki2os y xiced next to the first electron?

  An electron and a proton are separated by a distig) 8ew hj mo7n60sgaod.5zc 0x mu49iance of 1.0 m. What happens to the magnitude of the force onneh 67sdx0jo.i50zm894)aciu wmo g g 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. What ham(tuh(ewz 9ol w yy *my+,b58nppens to the size of the force on the proton if the electron is moved 0.50 m closm yyl w8mw(n,b9(5oyz*h ut+eer to the proton?

  A point charge of +Q is jasxgn* 5q0gfcd0:8 (u;fbai 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 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 electrostatic force acting on 5qu f8 *nix0 s;gdaj fbgac:(0the positive charge at the center of the square?

  A point charge of +Q is placed at ir8kz2n:gq rrb*ik yy:j:k ) /the centroid of an equilateral triangle. When a second charge of +Q is placeyy2r/zj brnii g8:kk* :rqk:)d 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 not a vector? lq/w/.ezcsbw.7gh -b

  At twice the distance from a point charge, the strength of the electric gfvh77jbtouht(3; g0 field

  Is it possible to have a zero electric field value between a negative and 8 zb1 ;f2a6wb:shsdtp gfr,w- positive charge along the line joining the two chargeb 8g6p1whrfwdbfa: s2,;szt-s?

  Is it possible to have a zec:2fd(,d:p*a03-neep dwbd-jtm9c kz d.rn hro electric field value between two positive charges along d.cpd kc0--2jd dbe :fna9n:p m(3r *dzetwh, the line joining the two charges?

  Electric field lines near o02pp61ta6fxeia, pv psitive point charges

  The electric field shownyv7r2j- b 41kbconzi /

  Can electric field lines intersect in frtd0))9ic8;.dl/ sltggs 9 sftim nek-ee space?

  A solid block of metal in electrostatic equilibrium is p)jl)t5d2f z;t u/j0h qgostq,laced in a uniform electric field. Give a statement concerning the electri ) )jfs2t50u qttj hl/oz,dq;gc field in the block's interior.

  If a solid metal sphere and a hollow se.jq2vmi 3:hmetal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and thqsime3.2 :jv he surface is

  A cubic block of aluminum rests on a wooden table in a region whec ( :jm)p1 8owf4vrhhwre a uniform electric field is directed straight upward. What can be said concerning the charge on the block's) ohw:c1r4wvh jm8f(p top surface?

  If a conductor is in electrostatic equilibrium nearo:2m1r 3 /n.q9q1 iscnak+1lhw muglj an electric charge

  A positive point charge is enclosed in a hollow me7xe5zi q +jjn.tallic sphere that is grounded. As compared to the case without the hollow sphere, the eleczijqe5 7+x.j ntric field at a point directly above the hollow sphere has

State three properties of conductors in static equl2z .o:r0xj5h ghku;dybf( d fp 5l98tilibrium.

State Gauss's law.

  The charge carried by obouqji0 ),3eo ) v4dehm;sfxa dh/(,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 has a net charge of +2v fro 26jl4( g:xfnb9l.00 mC. How many more protons than electrons dox (:g62nrjof9 4lflbves this piece of plastic have?

  What is the charge on 1 kg of protons?i5he kdh,yf*p cy6-++g p an/m

  An atomic nucleus has a cha7scg0vev1x (s bs6v zse09k2 brge 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 chargh (gdbo4 *6 u7g(beerge values of 2.0 and -4.0 mC, respectively. What is the magnitruged eh*(g 6(4obb7gude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betw1u8io9dns 5vceen them is 1.0 N. What is t9 snui1cdo5v8 he magnitude of the second charge?

  Two 1.0-C charges have a fozv(rduyq9m8 0);w jna rce between them of 1.0 N. How far apart are they?

  The force between a nms7 fg y2yvkgw;t: o;vz56v4$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm auuow*+ycjmcul5 i/-q:+ 9 ehfpart, experience a 1.0-N force. If they are mov9/ q5cifwc-uhuulj *y+ +e:m oed to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC aresk (ozwugk-bga*-f83 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 and direction of the electrostatic force which acts on - 3guwog (bf-8s*kakz the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +cyhl/,v,rim8 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 electrovi,h,rly m 8/cstatic force which acts on the charge at the origin?

  Three point charges are located at the following posx bf6 ko7ac0x,itions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC bfx x0o7ak6c, 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(v8dzaope )r 6 square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostati6ro z)8dev ap(c 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 muypk 4f7hf-t mx0g +2p, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the4p2+mpg y 7-uxfthk0f magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 w 7yaw7y1, kbe= -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the directiyyk we7,ab1w7 on 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 k9+nvhbno:7bk- s wp;7 *fkxqtriangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the chargekp77-vkw9b x+s;:kfnnq ho b*s?

  Consider point charges of +Q and +4Q, which are separat trww2/rebi8(qt0ltc.// jan sp h-7xed by 3.0 m. At what point, on a line between the two charges, would it be pojr7 wcp hitr.n( 28/-/btsx0l q/t ewassible 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 at x = 4.0 m. Wher:ug bv9-fyb+i e on the x-axis can a third charge be placedy:g-vi 9ub +fb so the net force on it is zero?

  Charge +2q is placed aavton8-fa2c4y ;z jt 1t the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on ;zatf8c vty2n14 j-oa it is zero?

  A copper penny has a massku:h-/62; af jmftqgs 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 gra* jvnkad8+x83 gqel4j vity by the attraction of a fixed proton some distance above it. How far above the electron is the prol k8xgejda48 v+jqn *3ton?

  Two 0.20-g metal spheres are hun*dq8d2zcqkl0e9 sa nj nlu9/w*fts6 4g from a common point by nonconducting threads which are 30 cm long. Both are given identical charges,ad/d6c s0s9knl*ljeq*4 t fwzqn9 28u 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 chargezrrcnsat -23* jm+ n7t8xlrn) of +40e. What is the magnitude of the electric field at a dist )cm 8atrrr2-t n*s7jx+lz nn3ance of 1.0 m from the nucleus?

  What are the magnitude and direction ow w/nucg,66 v0 f.vsa(f/ 3gxbkuelo- f the electric field at a distance of 1.50 m 6u6xcvk b.0anwewg gf, (ul//3v of s-from a 50.0-nC charge?

  A 5.0-C charge is 10 m from .p uexeb,0zz ,7pfqht0c 7j7 f i:lnr2a small test charge. What is the magnitude of the electric field at the location of the 0p 0exfq7. 2lpf7rj:7,,zhutcnzbeitest charge?

  A 5.0-C charge is 10 m from a small test charge. What is yp; 4bnfa8 jg dn8g9w 0f)zv,tthe direction of the elect8 9yjbfpd)a4vgwn t0,fg n8 ;zric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the fiky(t3 24(fq el;tdwp orce experienced by a 1.0 nC charge placed at the location p(itetdyf(2k q w4 3;lof the test charge?

  Two point charges each have a value of 3.0 C and are se3i;dpeyug* r0g ieu;9yjt ).mparated by a distance of 4.0 m. Whd *iu ;.9 ) myi3yupte0gj;gerat is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark o 1bz2aayuenu1p scwd(46f;:kz 25 nygf a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is th yzy:wu6; nfk2zd1(uaa g2scbn5 ep 41e electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stih)+ *i k.3 hrw,*:amrcf mdz-wobl)mo ck and a -4.0 mC charge is placed at the 5hw,)omk -*flzr.)obch *w3mm:dr+ ia0 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are plac5m;odeits,m( ed at x = 0 and x = 0.20 m. What is th s m5,oimetd(;e magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squasg-xqc/j -he: re of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electrisxqeg/h -- c:jc field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cornergq0n *izw3 5vhs of the square a5nivhzwq g30* s 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 .m1oi. *71diyyimep v electric field. What is 1miy1e opmd7i .iyv.* the magnitude of this electric field?

  A particle with a charge of 4.0 mC has e47nascg76bf:prpr;o cuo :rph ++e ,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 field of 6000 h1 2j etse s0((8pyu:b gucbq:huui(- N/C pointing downward. What charge must be placed on the ball u(gueshu 0pc qu s2:e bji8 1t-y(h(:bfor it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.ot/3lvf7 li a200 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and directiovli/o 3 2a7ftln of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. 3a+uu; cv uso6 What is the magnitud;uu6+ asuc3ove 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 mC. What; o1hxdmsd m5; is the electric field 6.0 cm frd;s mhmdx15 o;om the center of the sphere?