State the law of conservation of electrk q,2(mq*9rurtfdx m8ic charge.

  Is it possible for two negative charges to atsg-v xqctk:-dy19p5n tract each other?

  Is it possible for a positive and a negative charge to attract each oth, (.l rdo3 ywnodv6qe-er?

  A glass rod is rubbed with a piece of silk. During the process the dd6dc:e;p0hh glass rod acquid60:he dpdh ;cres a positive charge and the silk

  A proton carries a

  The model of the atom sho(zz juyuu7-z6:kld 6tws a

  A neutral atom always fp13t 1-km*jv1 i d2f cvncnh2has

  An atom has more electrons than proto7pyzx-fmv a5. ns. The atom is

  Materials in which the elec )aabe:8sz6zwuyr8l3trons are bound very tightly to the nuclei are referred t urezw8 z63by8a als):o as

  Materials in which the electrons;j n hxk/v .u73jvy6ys are bound very loosely to the nuclei and can move about freely within the n7 yvhjvy .u;j3x6/ksmaterial are referred to as

  A negatively charged rod is broughmnzog h js .,57lt:z5 +ymoxt5t near one end of an uncharged metal bar. The end of the metal bar farthest fromhsmn,+my. xol5ot:gz5 jt z57 the charged rod will be charged

  Sphere A carries a net positive charge, and za2:vqfp wyhw :gu;( jk4 u+g+sphere B is neutral. They are placed near each other on an insulated table. Spqh +gk:g+4yv; p2z:u afuj (wwhere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negativelygo- ,sm b0xg vh4i:rg:*m+ubd charged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touch/):qu to1n bb epq/)gjed with a positively charged glass rod. jbo gqe ))t/1p:bq/unThe electroscope

  An originally neutral electroscope i 97w-ehphvr dlda:1y 0wz3ct -ye6 .zcs grounded briefly while a positively charged glass rod is held near it. After z e ah06tde.y cw79zld-ryw3pc:h1- vthe glass rod is removed, the electroscope

  A positive object touches a neutral electtfi 2jgd-y,)wr h8t/ nroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happe 8 y2 t,nt-irjwfd/)hgns to the leaves?

  A large negatively charged object is plh g:je7 abo(.naced on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neun7(b h:.oajgetral 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 con: e18kpms z8kfdnu/,n*s uu 8h,g.ckfstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distab /q64+w hgo u9.7c.xbgsamx cnce d. The first charge is larger in magnitmqcgog/.s. w9+ xa4uh6x7 bbcude than the second charge.

  Sphere A carries a net charge and dvr/wvb z.9zbgq o6gl0xh xy ,,c(-*q sphere B is neutral. They are placed near each other on a- y h6cbwg,* v.0 zqqdxxb (o/vlgrz9,n insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges ow:lh l2.5l ax ;brn+)jarw p.zn both objects are doubled with 2plzxj:rbnh+)a.. ww;5l a lr no change in separation, the force between them

  Two charges are separated by a distance d and exe :ug .i*fcq+vvrt mutual attractive forces of F on each other. If the charges are separated by a +cv.ufgv*:qi distance of d/3, what are the new mutual forces?

  Two charged objects atgrer r ,j 9e-6tyyag9/-2anp ztract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separatio9r gze9-r,-/a r n2yt6ajpy egn 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 1.0 m. Whxhh(bp0+r 4w,zd1,aw9vvs zk i rx;2qat happens to the magnitude of the force on the proton if a second4(xh 2 wr ir;sbwp h+kqza,zv d0,x91v electron is placed next to the first electron?

  An electron and a proton areet4m91 uxx;okqx4fb+ separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next t+m49tx k4xebo; qufx1o the proton?

  An electron and a proton are separ,se b v,i/4rzhated by a distance of 1.0 m. What happens to the size of the force on the proton if the eleczsi4,he, br/v tron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second ng w9k/julxowrp8 3 40point 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 wu /w gjpxl340nkr 9o8of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroi2u)t vf+k8 jtsd 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 act+fjt 82)ust vks 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 vectqmjl5vis,dw dh 2e/ 0,or?

  At twice the distance from a point charge, the strength of the electric dko ;-jqwe1f-field

  Is it possible to have a zero elect:+-*w yffb ux ,dcnws+kl3d1fric field value between a negative and positive charge alo + fwld fdc3ky1wb-*nf,x:+u sng the line joining the two charges?

  Is it possible to have a zero electric field value betw (d)chh7t-1a r(7wd *; uvbfrw;dwic ceen two positive charges along the line joining the twiduhvb;(c;7 tw( wrc* w1fa) h -rddc7o charges?

  Electric field lines near psitive point chargeb(9 ,kbms qo4uj0y8lcs

  The electric field showny6 z,p3v;g4awv+ ff yp1yl)u*d i.utm

  Can electric field lines intersect in free space?l;mug6 ;6e3bfi 41wb9 hjcbyz

  A solid block of metal in electrosbctf( w 1hfnui261cfi1d nn1z m6d9 +youef4 2tatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's 19w1fif 11cu2 c 2d4bz( mtn66ueh+inoyf nf dinterior.

  If a solid metal sphere and a h3ip9 ukxl 38bkollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the kpk3i8b lxu93 center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifo qsfi/ync8h: :rm electric field is directed straight upward. What can be said concerning the charge/nihfqys ::c8 on the block's top surface?

  If a conductor is in electrosta-3n(kzc rgxq z70ce5 atic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thacp5egc ,m 1a1xt is grounded. As compare5 cg1 p,ecxa1md to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in stnkdxxkp* 82 v6atic equilibrium.

State Gauss's law.

  The charge carried by one electron is gt/;op 5 /:wu2netrlb $e = -1.6 \times 10^{-19} \; C$. 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 i: he3m6rp9os mC. How many more protons than electrons does this piece of plastic haveh9prsoe:36m i?

  What is the charge on zhlld1 u9;) ./aybzyq+pmy t/ 1 kg of protons?

  An atomic nucleus has a charge ez;2537v t(aeb eemzp of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by z90m9m yirk/m 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What y/9imz k 9mr0mis the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, a6cz8j j2*3 vb v* p*s/peqp9rdae; tppnd the force between them is 1.0 N. What is tr8/pp6 cvazjj9;q* 23 p e*pb*dsvpet he magnitude of the second charge?

  Two 1.0-C charges have a forcy 8bivas-j1+9t .6yyka1in6ut5 jm nze between them of 1.0 N. How far apart are they?

  The force between a ,1le5 nn7 syqu5vh9b-fp )i(y/ sdq wr$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, i o(gf9sdr4ch)nitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new sepa)cdog(4hrs f9 ration of 8.0 cm, what is the electric force between them?

  Three identical point charges 3q)bdmd x;z 7sof 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 the magnitude and direction of the electrostatic force7b3z)x;d m qsd which acts on the charge at the origin?

  Three point charges are placed on the x-ax43kzc fg/ a)lzis. 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 acts on the charge c )gz /aklf43zat the origin?

  Three point charges are located at the followinuwf(u+gs 2yf 0g positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1sufw+ g0y2u (f.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is 8/j jb9 n4purdircmo) q2.lb, (dg)so placed at the center of a square, and a second point charge of -Q is p rlb(2/)8d j4bsqprgc9,)oiuonmj. dlaced 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 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 nCbosdmk6d; xc 4t7 l2l. is at (0, 0). What is the magnitude of the net force on the 5.0 nC charg4.2d6l sokbdt;xclm 7e?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5eep ui+25hu f-.0 nC is at (0, 0). What is the direction of the net force on the 5.0i5 epufh2 +eu- nC charge?

  Three identical charges of 3.0 wo4c 1 d1;xwq 9j(jcehmC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the c c1djxjc4h; (owe1 9qwharges?

  Consider point charges of +Q and +4Q, whicsj,wpg h0f;qq9 4 b/mdh are separated by 3.0 m. At what point, on a line between tq q;9gpmbds0,fhjw4 /he 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 orig 2flma6b*g x-jin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis ca *f galmb6x2j-n a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -eb*s t5b dlv/m )j2q8pzfpflx,(i 9-lq is placed at x = 2a. Where can a third positive charge +q be pl( l9flb*lp), 2sx-dp8fb eimqvzt5 j/aced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totoi6w0+46aaqgyjiu 1 a 6k+i foal 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 ;* ijp5kq j,0 qus5r* (stej,h-pvlr uthe attraction of a fixed proton some distance above it. How faq-,,ls sqjv5;u*rkujjt p5rehp*0( i r above the electron is the proton?

  Two 0.20-g metal spheres are hung j vpxsb* *zm,x*)vr l3from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsionv,p rj*z*v)s xl3bmx* 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 ay,0isg 3uu 5 ljpxy/:electric field at a distance of 1.0 m from the nuclepj5s3/g , i0ly:xuuy aus?

  What are the magnitude and directio(y(nnuo z u-yrfoc+6+(qbt8b n of the electric field at a distance of 1.50 m from a 50.0-nC charg+ozfc-y b6(tu uo8n+br (( ynqe?

  A 5.0-C charge is 10 m from a small test charge.h y*)lv sb/vw, What is the magnitude of the electric fi, /lwv bhv)y*seld at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. mtr- ;wcdaet;146h/ qxn tx: o What is the direction of the electric fw 4xmc1e-:a t qh6dx onr/t;t;ield?

  A 5.0-C charge is 10 m from a sma3um3r-v7u :eujijbvjo-bhja6eh fdgk*906/ ll test charge. What is the magnitude of the force experienced by a 1.0 nC charge placedu ee:60djkiujvmr3ga b-9* 6jh7/ofu-b j3h v at the location of the test charge?

  Two point charges eachazdx 1gr/8rgys(, :mm have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midrya,g mrsx1 :8g/d(zm way between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sticl0cbrok g 624plo/ckn ;:zn6xglt i1-k and a -4.0 mC charge is placed at the 5 cx lrpo :zg0621b /lto- kknnl6gi;c40 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 5ujh y*wpb)bd5*j y +ua -4.0 mC charge is placed at the 50 cm mark. At what point on a lihp)jj u b+5wduy*b5 y*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 xq:g;mk tph3-b 4k ue1= 0.20 m. What is the magnitude of the elegheqm :-kk;pt43b u 1xctric field at the point midway between them?

  Three 3.0 mC charges.;uout -.mnh1 qxw 7ra are at the three corners of a square of side 0.50 m. The last corau71.un .m q owx-h;trner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners o7 qbw(a;i ,ny7 j9s c0,wbhqjhf the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, y9nhb(7ac ,j0w;7qh iwbsqj ,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 nuxs8 x1bx/g9is placed in a uniform electric field. What isuxn/sbx xg91 8 the magnitude of this electric field?

  A particle with a charge of 4.0 mC hasyhbaas7k v5.2 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 r)6j2qr4d q rhgx/s61qe cch)of 6000 N/C pointing downward. What charge must be placed on the ball for it to e)/hj1rq sg42cdxhr6c )6qr q be suspended?

  A foam ball of mass 0.150 g carries a charge nkp5/;n f gzrn/ rsibu1x99,aof -2.00 nC. The ball is placed inside a uniform el1k rgbp/ ar,f5x nu;s9 /nzin9ectric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of raditjb:n)s6ztiit bbw85t2 s0 9d us 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere't5t s9wn:sbbtijzd06)b i8 2t s surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC.-f.p7+:uz x0zbb dncb (ncl0z What is the electric field f7-ux. +dncc(nzzb:pb0 0 zlb6.0 cm from the center of the sphere?