State the law of conservation of elec ,e p4wr7j)*dezv2g pi6cn)fitric charge.

  Is it possible for two negative charges to attract each :mvmv52 he t)sother?

  Is it possible for a positive and a negatifv*/iihnz4v;6c su-jh s,3i lve charge to attract each other?

  A glass rod is rubbed with a piece of silk. Du*+ p*px xh;p3uf kb0(h3qkhgp85kfjcring the process the glass rod acquires a p hpfpxfk3c h gq*+k0pu;*kb 83x5h(j positive charge and the silk

  A proton carries a

  The model of the atom sbzk-w 6mdi 6w 6yk3ua, 6yq4yahows a

  A neutral atom always has p ppokd68o/bh b-i0f9srv d;/

  An atom has more elect-i/nob nw)8x mrons than protons. The atom is

  Materials in which the electrons are bound veri 1xr: 0m(lo1ajmoiy e5en1q /y tightly to the nuclei are referrm5e11 e(mjqlo /1r:i0oi nax yed to as

  Materials in which the electrons are bound very loosely to the nuclei and cc x):)*hkhkfb an move about freely within the material are referred to akb )fhc*:kh )xs

  A negatively charged rod is brought near one end of aksu r6ep .rj:x*xp:2yn uncharged metal bar. The end of t ypu26x*.krxs r jp:e:he metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and spiv v g vz7 en3mn5,)d03 e5zb8uc4hj3br.mtsphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire thav3, 5ij b3 0vzm uzn4mepv 7n85h3.gdsbte)rct is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positive0n 9kl2 tuls+qly?

  An originally neutral electroscope is brie +5n wtbnp3f7rfly touched with a positively charged glass rod. The elect73 r5pbf ntn+wroscope

  An originally neutral electroscope is gro 5jw/nju8wx3p unded briefly while a positively charged glass rod is held neaj/ u njp8w5xw3r it. After the glass rod is removed, the electroscope

  A positive object touchb9:vz5 yti +.o*n vldvhkh53ees a neutral electroscope, and the leaves separate. Then a negative hv hnkt5oy:*95ebl+ dz v.v3iobject is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charge8 d 1n5hqjqsmw:;wdf6 d object 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 followed by the first ball, strikes the first ball, and st hq:;mdnw5d wfs6q8j 1ops. 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*nmog zb/ ):l szu7vj3stant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge w yyrcnu l+/n( ffb(i j07+ts4is larger in magnitude than the t 0lfy(unyrjib/cw4s(+ n7f+ second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near b0 -tts xthg dys90*n.each other on an insulated table. Which statement best de0hgybst0*-.ns x9dtt scribes the electrostatic force between them?

  Two charged objects attract each other with a cerrwci:k942 pnzv9v s.nub *i -ztain force. If the charges on both objects are do v2 *z9 -nki: n4rc.wspz9buivubled with no change in separation, the force between them

  Two charges are sepa-: /r6qgma q,.dhdjl q(b( tqgrated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of ddgtq:.q/ g a(qdqb,-rj mh(6l/3, what are the new mutual forces?

  Two charged objects attract each other with a forceqxrb e-l33 c7m 3jk1td F. What happens to the force between them if one charge is doubled, the other charge is tripled, alxqj b 1c3t3-dke 37rmnd 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 b,e3v1dor e l.1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electrordl,1 3v. eoben?

  An electron and a proton are se 2(hn0s-e*bewd h:roxg*ifj: 8bh6w c8rfm w-parated 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 to the proog ecbb wr80- hwrh 8n26fid e-:f(wm*s*: hxjton?

  An electron and a proton are separated by a distance of 3t2ul/ /2okfch :mq ad1.0 m. What happens to the size of the force on /22 3:hlfdco /mt kquathe proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square.vr ux.1+bp9eb 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 a .b9re1pu+v bxt 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 at the centroid of an equilateral triangle. ( *+i tcrl7z avtw7e*d1y5 4 kvy,i8v3qhp rbq 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 acts on the center charge due to a third charge of +Q placed at on7i,*p* vrthk r czwb7tq4 5(avi83+y1 yd vleqe of the other vertices?

  Which of the following is not a vectoyef+ v.dz *bu0r?

  At twice the distance frot)9v sh v-3 :aa dzmi7)k4gnmcm a point charge, the strength of the electric field

  Is it possible to have a zero eles,,xc6 0lgv;n lkey g6ctric field value between a negative and positive charge along the line joining the two ch;6y,, 6gne0x llckvgsarges?

  Is it possible to have a zf clz6p y9qh(2ero electric field value between two positive charges along the line j hl2qp6yzc(9f oining the two charges?

  Electric field lines near psitive point fqm,t x6+wem z,ab 6-v,rc3ivcharges

  The electric field s(1 kmbm5kslb/ hown

  Can electric field lines intersect in free sp-vx6e9.zlgn(g y 5yu.j- slp sace?

  A solid block of metal in electrostatic equilibrium is place0:qbq mddk2x)r t*dear 0t. 9ueo8o ,ufsi5/ id in a uniform electric field. Give a statement concerning the edfxtk 8buo/q9: s,)iitm 0*du 0.o5rade qe2rlectric field in the block's interior.

  If a solid metal sphere and a hollow metal speb9m1hag xpp 5y2k h+/here of equal diameters are each given the same cbxgy9 hph+pk2/a1e 5mharge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in am,dzy5 kry(g7x 4xt( vji;p*by(qojf6 ac u ,. region where a uniform electric field is directed straight upward. Whaf,jdctq(i((uzb4y* ;m5j 6ky7v xp.y o, axrgt can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nearcovp r)wzny+ko5tn0ig b; r0:2x-xp+ an electric charge

  A positive point charge is enclosed in a r0t5 ivi0q jg4hollow metallic sphere that is grounded. As compared to the case without the hollow sphere45g0 j0 tiirvq, the electric field at a point directly above the hollow sphere has

State three properties of conductors 0*cev wcb-l1 6 zd7piyin static equilibrium.

State Gauss's law.

  The charge carried by one electron -jhq0uk :f*rg 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 chym0 z62umu3cdanmes, u 5q0b(arge of +2.00 mC. How many more protons than electrons does this piece of plastic haveu5za0msm3uu2d( eq 0cn,m6yb ?

  What is the charge o9,zz h/a xdmlmrxc7e+6ch 1b.n 1 kg of protons?

  An atomic nucleus has 3/ynn6tn;d(/lu aau s 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 1.5 cm, have cha+ak r lrbgu3,/rge values of 2.0 and -4.0 mC, respectively. What is the magnitude of tharklu,r b g+3/e electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betweei )ht.c,iaz3h n them is 1.0 N. What is the magnitude of the secondt i,ahc)h3i. z charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are the 6f-g0npdp )viy?

  The force between a y3p5 9i3qri qc$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm .w gjlm ,. n:ct5+h.x*nwpaj iapart, experience a 1.0-N force. If they are moved to a new separation of 8.0 xntpgiwm* .j jn+ .,h .5:clwacm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pl* /(h4 um2cryl bc9n,ggkfuw0 aced on the x-axis. The first charge is at the origin, the second to the right at x = 9l2c0k*urm yf g4/ub,cg nhw(50 cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +;p;1ryeo xm, a2.0 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 chaoe;p rxy,a 1;mrge at the origin?

  Three point charges are located at the following posit r,tc* v*a3qr l6ejdrh 2t;x(lions: Q1 = 2.00 mC at x = 1.00 m;lt6ra jh e cvx*3;q,2r*tdlr( Q2 = 3.00 mC 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 cent,mwk m mlc 8vf0jj0r2kih21m) er 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 im 1k,jcwmmirjl20)8m0kv2f hs 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 at me r4w, qoo1go*gq9x0 (0, 0). What is the magnitude of th*oqwo mgx g09,q1re4o e 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 68w lff gr(i5k= 5.0 nC is at (0, 0). What is the direction of the net i6gl8(rfkw f5force on the 5.0 nC charge?

  Three identical charges n.uj 3) 7ulxa7 lwgcta878mdeof 3.0 mC are placed at the vertices of an equilateral triangle whic7wuut8lg d.aem8axn 3lj) 77c h 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, which33lp4wz be2 q :(dvcnh 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 that the electrostatic forceh42w pdcl3q3z v:nb(e acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chargih)z0vxg/pwe t3 0k5y e is at x = 4.0 m. Where on the x-axis can a third charge be pla k) epzxvgti0h /y5w30ced so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at,vufl* 3uje,ac ap4r . x = 2a. Where can a third positive charge +q be placed so that t*jr,,3u. 4evpalu fa che force on it is zero?

  A copper penny has a mass of b 3;a l2aj-adb3.0 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 ym 7w4eaf4ik :against the force of gravity by the attraction of a fixed proton some distance above it. How far above 4 ame7:ywf4ki the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thh4h*joej6og *y rg3o. zfa+/ breads which are 30 cm long. Both are given identical charges, and the electrostatic r af * 4hh3y.b6* ojegjg/ooz+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 magnitude of the 8y4w3 w zrf a6p,a3iwfelectric field at a distance of 1.0 m fr ,zfp f 83aww34iayw6rom the nucleus?

  What are the magnitude and direction of the electric field at w +5nmgw1ae(yokpt; f( ob90 sa distance of 1.50 m f(fwnsg w; (ept51by+o 0kamo 9rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chaf(99iwcs.;.*mxb2lp wgdmw z5x8 kmp rge. What is the magnitude of the electric field atk;xw5pd92gix.mbfls m(.* wpw c z89m the location of the test charge?

  A 5.0-C charge is 10 m from a small test ch1;fca54 s8h *rb ukw,ovpo* mxarge. What is the direction of the electric hc 1wrm5k,*u oxv8f *a;p4sbofield?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude w7tttunw 6(6uof the force experienced by a 1.0 nC charge placed at the location of the test chnu tw676(ttuwarge?

  Two point charges each have a value of 3.0 Cgloc5v u ybk/1s/xrb9m3. nw ( and are separated by a distance of 4 o.r (xwv 5cu1s/ ybkml3/g9bn.0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma+k:sir;ckh:ic ) ;emt nx*ug6rk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm matmsghx ;*i6+ ck :keri;)nc: urk?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -)czp 6-*kd zr3ox.ik+ tjwgi3 4.0 mC charge is placed at the 50 cm marjki* k. dz z3t-criw)+pg36xok. 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 placed at x nnqaw 4payv4:5x 9;rm 0/piobk,lsjg +jx2a; = 0 and x = 0.20 m. What is the magnitude of the electric field ;w4aaq/oa lysgjb;vpix0,nnj:4 9 mx rpk+52 at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50(ixshwt d 9a0.ebm. x9 m. The last corner is occupied by a -3.0 mC charge. Find the ed9.wxbis(a0 .x9 mhe tlectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are pl a:2;poia 1pbjaced 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 fi 2b api1ap;:joeld at the square's center?

  A force of 10 N acts on a charge of 5.0 mC whey w/*y *e9sqwon it is placed in a uniform electric fie *wqey/wo* sy9ld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a maskcvpy 2d-c-y6s 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/eq 9 khwr qeh8..th7x(C pointing downward. What charge must be placed on the ball for ithqr(k h7he e .xqw8.9t to be suspended?

  A foam ball of mass 0.150 g carries a charge p;pc+idm n-u*of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravitym u;c+*ni-pdp. What are the magnitude and direction of the electric field?

  A metal sphere of radiubp bzsxnh-l 5auq- qgw4qm++s: 7- -hns 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surw l5n qb:+q-s-phhb4-+gz- a mnsq7 xuface?

  A metal sphere of radius 2.0 cm carries a charge of k3sxy:58 d kme3.0 mC. What is the electric e y 35:ksmxd8kfield 6.0 cm from the center of the sphere?