State the law of con 4)k6ehn szq3cservation of electric charge.

  Is it possible for two negative charges top um:( ex-7htbpr3n2d attract each other?

  Is it possible for a positive and a negative zbn) x y 5a qgoqa;7yzx)n:2n0charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gla5++gb /dgsiua ss rod acquires a po+a5d + bgsig/usitive charge and the silk

  A proton carries a

  The model of the atom sh nqtogsg blfk)+25;y:ows a

  A neutral atom alwayrb/k, ce;1d v-jak:czs has

  An atom has more electrons than protonsbtlmvzko)sw83x47 ) m . The atom is

  Materials in which the electrons are bound very tightly to vb;x govpw6t,4e 3 wr-the nuclei are referred ,4w 3gx- pbv;ow6rvteto as

  Materials in which the electrons are bound very loosely to the nucluk) 9p4t fx8sjei and can move aboutxu8jktp 9s )4f freely within the material are referred to as

  A negatively charged rod is brought near one end of an /n n gxjc:uu,e5dm6:l h-.xuy uncharged metal bar. The end of the metal bar farthest from the chargeceu.uj6x 5:x/,n mlh ugd: y-nd rod will be charged

  Sphere A carries a net positive charge, and sphenz.r fg jbt xb;,gyc,np/)+ /ire B is neutral. They are placed /,).b;ybgx pf +n/i jt,crngznear 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 electroscu -o/cc )hqci5ope positively?

  An originally neutral electroscope is briefly toucu e bvtwl,1u:/hed with a positively charged glass 1eutvw,/: lbu rod. The electroscope

  An originally neutral electroscope is growm)77m:e5uyg7)lnry cwh :kv unded briefly while a positively charged glass rod iyukm y) 7wcwn75e:lrhgv7m :)s held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. Thenw2ld-wonp i q72w pvy7h7 ;rh) a negative object is brought near the electroscope, but does not touc 2phlr;v 77wihpdy2-wnqo w)7 h it. What happens to the leaves?

  A large negatively charged objec+u xvyyhd w:v/tcu(qf,18* zut is 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 f+,wfzcq/xudt y :vvy8(*hu 1 uollowed 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 Co1o6pwr 4m.n ognwa;ep:b q1tws 4x0 9iulomb constant $k$, which appears in Coulomb's law?

  Two charged objects ar2n xn -9rvf4x.1wzt*ndgk3cxe xkv ).ih5q 8ne separated by a distance d. The first charge is larger in magnitu4r 3nv) fxc*xk..z9gntvk en81h iqwx2- 5xdnde than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are pl.wsr.svwn r0fj x:*z gk*e/c)aced near each other on an insulated table. Which statement best describes the electrostatic force between thersr .vj*e0c fw)g xw/*sk:.znm?

  Two charged objects attract each other with a certain force. :o 7gugo*2sbcxn4o /uIf the charges on both objects are doubled with no change in separation, the force bet*7cuunbx4o s/:g g 2ooween them

  Two charges are separated by a distance d and m 977jzi9vd r2 lsopaaft3v :/p0az6fa/z(sb exert mutual attractive forces of F on each other. If the charges aflvzm 93t(f7azzvosa r 7bp 0/dj :/s9i2ap6are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othlu 1xqrjy1m xkzt,w o5pg*/ )6er with a force F. What happens to the force between them if one chao*)gx uz,6/ly km5trj1 qx 1wprge 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 equal to

  An electron and a proton are separated by a dihe2i i6t1bxi(stance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electe i6iih2xb1 (tron?

  An electron and a proton are separated byz g,ot: fvpga9vb()z * a distance of 1.0 m. What happens to the magnitude of the force on the first electron izpav(tb 9g: )*fzv ,gof a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens txi4uhl8 6s+gh1 *wgj.g tkt4 ao the size of the force on the proton if the electron is moved 0.50 m closer to4htikg6sg8+1hauj*w4t. gx l the proton?

  A point charge of +Q is placed at the 5bomt6+ l2nyj3h -t rhzr) o-acenter 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 tr h3r b hty joom)5n-lz2+a-6the 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 at the centroid of an equilateral triangle.gjm;t;5,oebts xd05oau( e+b When a second charge of +(e 5jgbmx;oatsub + to;e 5,0dQ 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 (/g:ld ij 0- isduegd3is not a vector?

  At twice the distance from a point charge, the strength of the electricc .*h qr(9aoty field

  Is it possible to have a zero electric field value between a negative and posi+kl3s)n6yqrjmros -l .v 4ta.tive o-.s l3lrky4n6 m+ja .vr) sqtcharge along the line joining the two charges?

  Is it possible to have a6r8 kdo .ch91ykbsc.b zero electric field value between two positive charges along the line joining the two c9s. kcb.kbo hc61r8 dyharges?

  Electric field lines near psitive po 70ngkcb dcwh/)6kfl5int charges

  The electric field shownwg3 dttu w;+ ssu83u3n

  Can electric field lines intersect in free :s(gqrj 5f*a1vj c; vuspace?

  A solid block of metal in electrostatic equilibrium is placed rjylpq1 2n3.lin a uniform electric field. Give a statement concerning the eleqlln. j2 ryp31ctric field in the block's interior.

  If a solid metal sphere and a hollo3gkg h 0 dursy5rq76w*- di6bmw metal sphere of equal diameters are each given the sa s -3yi7g5dd rgrwk0mu6 q6*bhme charge, 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 un7;o8 d3ef)xjmfkut 9 itq1rv1,/bb weiform electric field is directe3r vxdo1f8b i eu,j;tetkm q7/1b )wf9d straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostaqz02g*bz9)s y qmh,eztic equilibrium near an electric charge

  A positive point charge is enclc/j: g/7smgb gudq1/wosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sp :wsgdgqjbug//mc7 1/here, the electric field at a point directly above the hollow sphere has

State three properties of conducvx2*3 wgsp1rnxw07 uttors in static equilibrium.

State Gauss's law.

  The charge carried by one+ahx/ :6 vq7jncdaz: d 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 +/ znust *)pl.t2 ta1ad2.00 mC. How many more protons than electronsltp 2ztsdtu/*. a1 )an does this piece of plastic have?

  What is the charge on 1 kg of;(ui ,tgm zy9z protons?

  An atomic nucleus has a charge ofz;y,a; w(fyhx xzf (j3 $+40e$. 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 values of 2.0 and -4.0 0vb mkr7gfv1pr(0a c /mC, rep1vc 7b a0/fr0m krgv(spectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m finr5 vrk)r mppv 0/u sqdbi47m 2,b5q*rom a second charge, and the force between them is 1.0 N. What is the magnitude of the second chargenm,57q0i2)5ibvprvu/ms kd 4p brr q*?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are t;p) k yugnb*eqy4pv8(hey?

  The force between a .q;nvb3ee 1jr j1t67ysqga 6b+4w qlj$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experiencev (h;, 5bz1(cct bmyud a 1.0-N force. If they are moved to a new separation of 8.0 (y(chb mut1bdcv,;5z cm, what is the electric force between them?

  Three identical point c, yavl, ym.kpk.g .rcq zsx7(/harges 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 the magnitude and direction of the electrostatic force which px/ ( .kclqy , yg.,r7.skvamzacts on the charge at the origin?

  Three point charges are placed onoe7p d9 r:ii2x 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 acts on the charge at the origin? 9r7o2ed:xi ip

  Three point charges are located at the following positions: Q1 = 2.00 mC at x =/6s wabb(9ml: ay(l kb 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is 9by ll6 (w/b:ka ms(abthe magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placergfv gihx49* wi n-cao9l+*4 dc, ldi5d at the center 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 char- n*hdc4l+ ga9lvoii xrfw*4c5 ,igd 9ge 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 nC is p;k +pckr5*rw ookmft *n,,+pat (0, 0). Whk* pnk,fot*rrm k+ ;p,op+cw5at is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0e u p,h1igi i;yek(5h+12lnhcif15z p.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the di( ii5f;h huph 1eyce 5gk, 2l+izn11pirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verticesk+d 5qf1vaz )/ ,asgrs89fddo of an equilateral triangle which measures 30 cm on a side. What is the magnitude ofv+gd dz 8sarf1qk) fo,9s5/a d the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.wd).: r6bye nww.hgj(a0 f;r v0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatir.yb:0h(a nd;rgew w .fv)j6wc force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.+7 /s5.yg,qy:keftjtk ast :a 0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placedf + g sj.5qt :,ktty:seak/7ay so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where ca bbr284wbnhq- n a third positive charge +q be plb8b r h4bwq-n2aced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A x 9zxbm )vl2-ftotal 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 forc is.o sg3x: llrg*;hj.e of gravity by the attraction of a fixed proton sohgl.i l3rx*s ;j:o. sgme distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from qxy* 85iq7rq la common point by nonconducting threads which are 30 cm long. l75r8q*qiqxy Both are given identical 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 the m16l3s l d(r53 bkhsmsragnitude of the electric field at a distance of 1.0 m f 1r5 rk(3d3sshslmlb6rom the nucleus?

  What are the magnitude and direction of thhcv/3o3(q9s2kon q9ra w f+tme electric field at a distance of 1.50 m from a 50.0-nC ch3 +oq a9os3q m9(tw rfh/n2kcvarge?

  A 5.0-C charge is 10 m from a small test charge. What km f(jh+)i u/:jr,wnsis the magnitude of the electric field at the locj j u,+shk)fnr (m:iw/ation of the test charge?

  A 5.0-C charge is 10 m from a q eh1ze*hd n;2small test charge. What is the direction of the electric fieldq1*dzhe ;en h2?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the 9,nenjz6lq+q force experienced by a 1.0 nC charge placed at the location of the test chargel 6nnq9 ,qj+ez?

  Two point charges each have a value of 3.0 C and are separated b5l z( umu gz)gi4d67*1mruut by a distance of 4.0 m. What is the electric field *t74duzg6 u guir5umb l1)(mzat a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a-n,h(xicj )0bk7dttz meter stick and a -4.0 mC charge is placed at the 50 cm mar7)(b 0ndcti,j kzxh t-k. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed a9u, sd)q nute4 1o cbg4.fno f(;b:dzft 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 line joining the two charges is the enu.b1,u gq) t:s cozo9;bn( dfef44dflectric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed65uj :m iss4:8gswhjk at x = 0 and x = 0.20 m. What is the magnitudeki8:m :6jsj sw4u5sgh of the electric field at the point midway between them?

  Three 3.0 mC charges are z s,ht rxas (mk.:5fw9at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fi5h( f x.a 9ssktmrz,:weld at the center of the square.

  Consider a square which is 1.0 m on abqsxsbji-d9x s ) 80gan;hnzml 4hb0j4,3u7 v side. 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, 1). What is the magnitude of the electric field at the squx0ihx sl- jmgn9)4 ;0 3v,has8bbq j7dn4zsbuare's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a ujfl8y1lhoi*:o-wt(tdj i r( b jh+3(iniform electric field. What is the magnitude of this electric fiei1dh*hfr8(llbt -wij+i(j oy to3:j( ld?

  A particle with a charge of 4.0 mC has a masw c7v g3p+mdok s3m(,fs 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 N/C p* g1wxcwun-3na.3/mfycmtg7guxc, zdq3 z;9 ointing down . ,; 3*f17xzw/ugcnq wxgutc- mmc39d anzy3gward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries -+fzcu bq 6/ema charge of -2.00 nC. The ball is placed inside a uniform electric field, and is semqu fb+c-6 /zuspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. o3,.cb7 nnpza +lnso 7v55*ufeqo d g/ What is the magnitude of the electric field 5.0 cm from the spherepsu.ln+zd o eg5q7bn5ona*c fo37 v,/'s surface?

  A metal sphere of radius 2.0 cm c /b:z)myvmu. yarries a charge of 3.0 mC. What is the electric field 6.0 cm from the centerz.vy/)mb um:y of the sphere?