State the law of conservation;0p / *q5.lgiux cu pdlqxh) arzb+-/p:ty-od of electric charge.

  Is it possible for two negativijz v .+x2pg,fhxm0g0ts )s,pbk)( 0qgkvw*ue charges to attract each other?

  Is it possible for a positive and a negative chxt; wj-( *ci3 gonh7 izg4ape(ocb-*barge to attract each other?

  A glass rod is rubbed with a piece0 b.g2mk+vp ri of silk. During the process the glass rod acquiresgikp rm.+b20v a positive charge and the silk

  A proton carries a

  The model of the atom show3c iqho559eg es a

  A neutral atom always haszlg ogaj , x30t0fbn/v7a mf4+t7 w :quu(pl5x

  An atom has more electrons than protons. Thz tdz13.rl+n oe atom is

  Materials in which the electrons arexvxkw)8sc8x b*2 ,uph bound very tightly to the nuclei are referredx* p)c uhb8vw2, ksx8x to as

  Materials in which the electrons are bound very loosely to the nkjs70cum 8) oi:*p+iqs wo 8inuclei and can move about freely within the material are rusio*8 +ni p7i:c msoj q0)kw8eferred to as

  A negatively charged rod is brought near one end of an uncharged metal barhf r fy2b/qx(pi)a +q:. The end of the metal bar farthest from the charged rod w2y(bq+ a)fp/ rqf:xih ill be charged

  Sphere A carries a net positive charg-9xqu9l6jfknq9v ,ary *j 5r le, 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 grounde jjr9uv ya9lxq*-k rq6,9n 5lfd. Which statement is correct?

  How can a negatively charged rod charge an electroscope posir ;4y2x/3f l zj+2rb 7pfjnocitively?

  An originally neutral elec:2n(q+s- 5 rz qnpzy/p9yfwgwtroscope is briefly touched with a positively charged glass rod. The elect2:/yqq-9w ynzp5g w(rn fs+pzroscope

  An originally neutral electroscope ht5mvo6u;g xwqk c i;*/qg;l 5is grounded briefly while a positively charged glass ro/ 6mucq; tk*5o;i v5hgwlgq x;d is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. Then o ):kvo(6zcv lfc h*lfab/-m3 a negative object is brought near the electroscope, but does not touch i /-l6hz:af(*3v cl k ovb)ocmft. What happens to the leaves?

  A large negatively charged object is placed on an ih j;k1ng74o gpnsulated table. A neutral metallic ball rolls straight toward the object, but stops before g n7g jop4;1hkit 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 Cou;n2jl1q * nk+ilo 3fyn, sju4alomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by 8iv sb7a-mi6blh *j8ma distance d. The first charge is larger in magnitude than the second m-is8h7jla6*ibbv m 8 charge.

  Sphere A carries a net charge and sphere B is neutral. They are placedjb2a .7xu.p bx near each other on an insjx.2 b aupx.7bulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the c3t dk6 g3l k)fzrczsn;lo84 -*mgnt;eharges on both objects are doubled with no change in separation, the force between themf )-dzkz33tlkl g ;8e oc;m*s grn64nt

  Two charges are separated by a distance d and exert mutual atk*sggjyk7s28slut w6 1b9l,n tractive forces of F on each other. If the charges are separated by a distance of dls lksu21jbn98wk,6tgy gs*7/3, what are the new mutual forces?

  Two charged objects attract each other with a for 97g b*7ky p)ysra ko+gf(xh5yce 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 yg*5r x sf9ya7o hgy()b7kpk+ 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. Whafe 6;wx1+hsa179q eml i.jrnvt happens to the magnitude of the +7;1 aexl fr .16vw9njihm esqforce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sepasw7bn-jb( 7phu3avz 3rated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron isn( b7 z7v3-wa bujhp3f a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens4v,bryswa 6/z9 - jkxd to the size of the force on the proton if the electron is moved 0.50 m closer to the p9wx k yzbv,6/ s4-ajdrroton?

  A point charge of +Q is placed at the center ow cgclk o8uep ,5/w p 3ee84+;d*saanqf 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 pos o e*a8nkuclq4wpe pwe8 dg;5+3 c/sa,itive 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 at the centroid of an equilateral triangle. When- y;:z4t8bdd/s6,nrpkav o :ehqvct 1 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 placedoa8zyq ,hpn dvd tb 6esrk:v1 :/t;4c- at one of the other vertices?

  Which of the followin kjc7 uk(jr7x;g is not a vector?

  At twice the distance from a pomqg oq),jxl(;;nec)vint charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and popjosa l8e69-sz8ie-h a3y2 aasitive charge along the line joiningo 6y8s 8aal ea -2ashp-9ijze3 the two charges?

  Is it possible to have a zero elect. ao: e3h b*4f-uarccjric field value between two positive charges along the line joinaec b:f.*u jaoc-3r4hing the two charges?

  Electric field lines near psitive point c 1 fc2t3j7 ua;ppu(wcfnp s-q6ws j9g2harges

  The electric field shvok -k;:5sjeivtu3vh4(n/ n j (kf nt)own

  Can electric field lines intersect in freyzfh: u6aho44 e space?

  A solid block of metal in electrostatic equilibrium is placedo k9 oiw i4:ss5kp:3vd in a uniform electric field. Give a statement concerning the electric field in the block'ski id5::w3o vssp49 ok interior.

  If a solid metal sphere and a hollow metal sphere of equal diametersl uk;x .j41tw6e 5pg ;vb4xazg are each given the same charge, the electric field (E) midway 14 t;gxea wbjgxlvu ;kp65.4zbetween the center and the surface is

  A cubic block of aluminum rests on a wooden table in a rek,ah cm2hp 2;hgion where a uniform electric field is directed straight upward. Wha;m a22pc k,hhht can be said concerning the charge on the block's top surface?

  If a conductor is inq4xa4 + zorv ng .ht1yh)/kcd/ electrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sph:.rqnc/q d ovma 5:w,k l6q,pyere that is grounded. As compared to the case without the hollow sphere, the electric field at a poilrq6c,,n:q q dm5a v.yop/kw:nt directly above the hollow sphere has

State three properties of conductors in static equilib/q8m6ln ybox; rium.

State Gauss's law.

  The charge carried by one elyne 4t mp 9)zm8o3 -afju:bv-uectron 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 thamikmw m+ 3-q9tq ex7q:n electrons doeqq i-ektmm97m+w qx3:s this piece of plastic have?

  What is the charge on bo9ncf.x /8i+c/ gyg k1 kg of protons?

  An atomic nucleus has a chargh (hj)m y/ bw*oa0r474of8 ugzdnb b(he 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 charge values xwwrlkmg3 h50b +7.jrz 7tu -qof 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them? mr+x0 7lq3-7hruw.zw kbjtg5

  A 1.0-C charge is 15 m from a secoe5j b( l bakk k6 p:2/0rw)pufhly0+jy.nciq,nd charge, and the force between them is 1.0 N. bpl/y.,ib0ly5 e0pu kq 6( wh)cfjn:+jra 2kk 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 air+lxu:p+ 0z ypj(bd3 re they?

  The force between a g 0:afjfcn44 f8b3xjd- riq e($30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experbssob .3(km( h f2 b/8--aflmw qo-bqrience a 1.0-N force. If they are moved to a new b-.( 8brs ml(f3q-2ho- sfbm waobkq/ separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The firun(mel 4l+3yk iz93ghky w*n3 st charge is at the origin, thnn giy+l3z*ku93wm4 3 hyl(ek e 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 the charge at the origin?

  Three point charges are placed on the x-axis. A charge ofy dd9tr7*sj-p +2.0 mC is placed at thj ydsp-d*tr 79e 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?

  Three point charges are located at the follo:1ii (kir)k mfwing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.0ii()k:f 1ikmr 0 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 square, xr ,u z9t w7zpgw1a+3iand 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 onrg 7za 1tu 9pw,ixzw3+ 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, ev/s l6c-+h rl;v1q hqsw;i/ k0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC chargev-ihqrw6+1 hvlcl ;s kse//q;?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5c0)*7 ly2rdpz 5x.umfn zb zc,.0 nC is at (0, 0c)d cy52rzfz.l bnx,pm7 z0*u). 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 of ae(a:ide :z lm*wjqoi(3*qk2u n equilateral triangle which measures 30 cm on a side. :(d*wm o2(: e*keuqq3ili z aj What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At whaea dyd/2po0u 2t point, on a line between the two charges, would it be possi2ud2poa/ye 0 dble 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 20vgl9f zeraf. cue8,origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is rlez09gfuvce 2.8af ,zero?

  Charge +2q is placed at the origin and charge -q is placed azgczyl4(bf 24t x = 2a. Where can a thir4 cly2z(4bz fgd positive charge +q be placed so that the force on it is zero?

  A copper penny has a m-ib u+ (t(sogwass 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 gravity by the attraction jgh(jgb/n8/)vaq h9 yof a fixed proton some distance/q hjj9 v8/gb ngha(y) above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncog kb b2-uwy9rh:7 d8nqnducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the tq :8r72kub wdg-bhyn9hreads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. tif42jea( mb5 b, om7tWhat is the magnitude of the electric field at a distance of 1.0 m from th,om a2ifb7t jm5 (t4ebe nucleus?

  What are the magnitude and direction of kn* ;xwhba qsoi3xz-rs,d,, 3 the electric field at a distance of 1.50 m fra zho3*3x bwid-r,k,sx, ;qnsom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small*y/uy ,fv.vv3vyyobg +u kq. - test charge. What is the magnitude of the electric field at the location of the tevykvu. v3+.b,*fu g y/- oyyvqst charge?

  A 5.0-C charge is 10 m from a small test charge. k 2sqew 8 r554sbglt0g What is the direction of the elec ws05k8 2b4r5lte qggstric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of *g3-sxs r o8s)lvx9ex the force experienced by a 1.0 nC charge plass-g*x9slr8v x x3oe)ced at the location of the test charge?

  Two point charges each have a value o v 4wad/:qm8)pqc.gmh f 3.0 C and are separated by a distance of 4.0 m. What is the electric field )g8a :mm4h/qvp.wcqdat a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4. ;qm) g+y/e:a4n okmq2xf:pfx0 mC charge is placed at the 50 cm mark.4:q o2ff/a)kq+pe ; gnxmyx:m What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark pciyfgu,amy .) /cm7w ,qg 9k0of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining t mcygpy90 if,qg./7cm,uw )kahe two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC yzsq:+hy62fm c m-dk;are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at ty-kdc q6;mf+hs mz 2y:he point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m.b/oss*;z*mq 4qs 0urq 0 a3qab The last corner is occupied by a 4q*um*sbaba 00zo qr3s /qs ;q-3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 0rcj,m -svg:+ xs7bgg1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC a0,xsgsg g7 vr:jb c+m-t (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 y2 3 aoqn4h4elyu)xb2ef 8jmd8n y66q it is placed in a uniform electric field. What is8uy bn4 yy2x2ofmeha4 )qj86de6l 3qn the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass jq9cg:*f 7)opaq6p:in4 sa qmof $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed 7mi:c)nha-wt nnw4ir/hc yennm( c :14*6bmcin an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be sus4ac :mthwe /7 ncin(hr 6*-c4wb:nm y1 mnnci)pended?

  A foam ball of mass 0.15a1qbf p3n0u*61ucbfo ,zsi9x0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric fz *0u 1p f9qbf1acbxnosi63u,ield, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cmu q3nau3+ij b:7cw6cp carries a charge of +2.0 mC. What is the magnitude cuj 7wca+: upn6 3qib3of 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. Whx eki2hv, :so1at is the electric field 6.0 cm from kovh1s:xe 2i, the center of the sphere?