State the law of conservation of electri2lva )6l,aqcb c charge.

  Is it possible for two negative charges to atb b 3z:ke8ow9r2 ij (bkjbi:)utract each other?

  Is it possible for a positive and a negative charge to ar,qpye82ke*53p;tw irx rbg 1ttract each other?

  A glass rod is rubbed witn5v:6hgol7f c 5phlu/la: fe)h a piece of silk. During the process the glass rod acquires a pohl /l7 lvuhof:fne:6g )p55casitive charge and the silk

  A proton carries a

  The model of the atom h9 r lqn kugvm :*7)jur2q)m8ygv) o5nshows a

  A neutral atom alway5qo).b9a( adgezm3 rls has

  An atom has more electrons than protons. Th ui h0t vy4f*3jz1cno0e atom is

  Materials in which the electrons are bound very tightly to the nuclei alhrb9)d1 xl5s re referred tox sl15 b)9lrdh as

  Materials in which the electrons are bound very loosely to t60h(b1 tt5n;6pdg lxo5s xyrche nuclei and can move about freely within the material are referred to a;c g(ntpx o5dh6y60bx l1t 5srs

  A negatively charged jezb5;,pg yu on 6-sh.rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod wiepohzusy- n5 6;,j. gbll be charged

  Sphere A carries a net positive charge, and sphere B is neu0bsv8pa6,z 0iyz, mdytral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement i,,mz86 szb idyypva0 0s correct?

  How can a negatively charged rod charge an electroscope posit(qf0o(ubjm6 cdy1pqf2/ us0k ively?

  An originally neutral electr.f 1yukpf/t)* xbypu0oscope is briefly touched with a positively charged glass rod. The el ky fuppyxu1*t /f.0b)ectroscope

  An originally neutral electroscope is grounded briefly whilehc+kcpwis 2j2,9 e,nayac, 7 q a positively charged glass rod is held near it. After ai7,qh9,+ewca2jcps k ny c,2the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepaf((m 1k yq.ajpdg2lc )rate. Then a (lykdf1. a()pc2q mgj negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charg+ay1 /9wozwv xed 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 stops. The first ball rolls forward, but does not touch the negative object9o w1/a+ wyxzv. 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 cq*l6 gi7rpb* wonstant $k$, which appears in Coulomb's law?

  Two charged objects are swqhg1j-w r +:peparated by a distance d. The first charge is larger in magnitude than the second char +pw:wj qhr-g1ge.

  Sphere A carries a net charge and sphere B is neutral. They are plmg w,fvg)r44tt)n 1za*xen* jaced near each other on an insulated table. Which statement best describes n ngftwmxj1 *4)t ) 4*rvgea,zthe electrostatic force between them?

  Two charged objects attrac 6a,ijvqm 22btt each other with a certain force. If the charges on both objects are doubled with no change in separation, the force between tjq6 2tav2bmi, hem

  Two charges are separated by a distance d and exert mutual w fs63y61qp znattractive forces of F on each other. If the charpwsz6q 3y f16nges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the7tz 7iuxv7 ;lu6;v lqkz9 v2op force between them if one charge is doubled, the other charge is tripled,o2ul z;zl 7u769p;k vti7 vxvq 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 prxrk ;ksw 6rztp3-;e(*eew 3kyoton are separated by a distance of 1.0 m. What happens to the magnitude w;kee3 pw k3t*6rksy;(ez xr-of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. ysdv+ msn2-a + What happens to the magnitude of the force on the first electron if a second electron is placed next to the pro+ asvs2m+dy-n ton?

  An electron and a proton are separated by a distance of 1yo1/1 mb.x*mck qeuy 9.0 m. What happens to the size of the force on the proton if the eq1/1x9o*mc k y.byemu lectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secondmp ypa /)e1iv3 point charge of empp3/ 1) iyav-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 the positive charge at the center of the square?

  A point charge of +Q is placed at the cenj1:y1,cxfsr 2kf pou/troid 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 acts on the center charge due to a third charge of +Q placed at one of the other verticefrpyf us: oj 12c1,xk/s?

  Which of the following is not a vectorw- z ,uucre2lpk.. hs;?

  At twice the distance from a poi3tww;p-whwq;8 g d g(xnt charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative xn d7 :7y0i1tdv/ h zyy2)hekna u49ngand positive charge along the line y1uvyz k9d0ih gex /4nydn7 n h2)t:7ajoining the two charges?

  Is it possible to have a zero electric field value between two positive char 3 yfk,wug/)o;.5az uokagjs* ges along the line j5koowg*su/3au; g k a.fzj,)yoining the two charges?

  Electric field lines near psitive point cha9.siv4rb qn3vrges

  The electric field sho; vuijkp yxy63h vi 8q/ja;6+pwn

  Can electric field linek, z:;q8 od(udlznr gxmh0z;p8,z3gas intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed2.i+)k qaiagi0b- ( sbvmdn;q in a uniform electric field. Give a statement concerning the electric field in the block's interio2ii)b0mqa d-vsikg+ ;b.n( qar.

  If a solid metal sphere and a h( g)z65 /ii fltsb-fmqollow metal sphere of equal diameters are each given the same charge,iz5 sg)( mf6fib-t/lq the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a re ucgbz* 7 f5x)f0rjk7ogion where a uniform electric field is directed straight upward. What can be said concerning the charge on thb)rf7z 5 g*xk7 f0jouce block's top surface?

  If a conductor is in electrostatic equilnj695x jb4 ly uwzkka08,*zsq ibrium near an electric charge

  A positive point charge is encag**gfs c1ji8m8 zv c.losed in a hollow metallic sphere that is grounded. As compared to thz *iv.ag8 fmjc* scg18e case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties o+zx rkyeh;hyz:/ 0fiufh23 i+f conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electy9j6aliuf)j ius q.z7hch1;n-y*7s lron 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 proh 1 c6umwh;+jltons than elect1+j6 wu;chm hlrons does this piece of plastic have?

  What is the charge on 1 kg of progyoj/8v 8 0m ffzj(gb(tons?

  An atomic nucleus has a chi(dgj:hx7 .p qarge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sep k)jh31ru;g5zj( q and k*wo5tarated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectiv kj3jgztkoa;h)15urwn 5* q(dely. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between dq4 orc(98 uwpthem is 1.0 N. Wh w4crp qo(9u8dat is the magnitude of the second charge?

  Two 1.0-C charges have a force mq i:nth5h;b/ between them of 1.0 N. How far apart are they?

  The force between a x2ouuw g * jv+a)qu-:t$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N forcwdoxzz4:6- rdo m(d8k1isa w g2,7lphe. If they are moved to a new separation of 8.0 cm, what7z4dw-h 6mdsirl1xakg8z, p(2:wdoo is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first:ccv oxrs: yvatz-lj, .f79s/ 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 sx9o:-sczc j/ly,:. fv t7var acts on the charge at the origin?

  Three point charges are placed on the x-axis. A chargcrba*fzvt6pj5 6bkh ,(pqvt-nd:7v :j 8)i ute 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 charge8bur,hpj7 d*) a6nk-v:jbi qc p6ttv (fvz:t5 at the origin?

  Three point charges are lxm6;p sj o:9jpocated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00j6sj;m xop p9: 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, anah)y2lsw7h ts p.7dq2 d a second point charge of -Q is placed at the upper-left corner. It is ob2 dsh)a7ws.l7qht2py served 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, 0.10r m/dbh,j3bb)fb8l 155vk pxh m); Q3 = 5.0 nC is at ( p/5xbf )bdv35 h,1km jhrlbb80, 0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 k2 :esnpb5)n r:spa3q = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the neesbq::np k3r p5 )a2nst force on the 5.0 nC charge?

  Three identical charges of 3.0 mC areh)zs r h-y1cttjq6d( 5 placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic fyts(d r6 )5ch-z h1jqtorce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At ck44tputczqh6ao g/7 8dn/k*what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic f7/qc4/ u op64az nktdt h8*kcgorce 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 md71x 1njdw u.j yn3g4 jk.:nun. Where on the x-axis can a third charge be placed so the net fou1n4ynn kj31d g.xu. j n7d:jwrce on it is zero?

  Charge +2q is placed at the origin and chan:0uzst(ve+0eb*kz/ysw ; nmrge -q is placed at x = 2a. Where can a third positive c:/ s zm0*y+e 0ztnbwns v;u(ekharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total/uorftawv;: v vms:4: 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 a g y5c. 4b k1u1,fd4ged/fwzdvgainst the force of gravity by the attraction of a fixed proton some distance above it. How far above thu5 dd4vb4dyf .z1k /g ,gef1cwe electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads 5k (sok o /bb3b wznabf6)ra1e8tq8r 9which are 30 cm long. Both are given identical chargesk /5 6obako (s8ra)3t8wbbfz rq1n9eb, 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 magnitude of the el(( snd0 z.l*(qakgqeyectric field at a distance s (z(gay( *ke0.nd qqlof 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance ox l x *ifcp/xha6m,(a,f 1.50 m from a 50.0-nC cia x/ 6x ,*(pmalc,hxfharge?

  A 5.0-C charge is 10o01mu 1id *j6ggl8xu y m from a small test charge. What is the magnitude of the electric field at the lou8u01io 1m ydgg6 jxl*cation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of t6 iz: *c5czf zx1kgsok6exj:4he ej5xck4kzz*:s i xc:zo166gf e lectric field?

  A 5.0-C charge is 10 m from a small test cha vbjf1*nd0 +*oau5(lckqnt6 i).8prwac1hrarge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test charge?l*pfcrwa *nnk 1jqavrt 1.uoc)8ahd( +i5b 0 6

  Two point charges each m/+ij l)cycpywi-:dc8 gzy(+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 midway between the two chargwy ml y +/ic)-cyz8pd i+g(j:ces?

  A 5.0-mC charge is placed at the 0 cm mark of a meter ab4v.r (7gt/m6yr.fw 9tf-ui* nzko o stick and a -4.0 mC charge is placed at the 50 cm mark. What is themtr6zot o/k9gnvu .rf b*(yf -7w4a. i electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark oph+(kl nqxm 7c anqm-+o /f52qf 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 efmm(p 2n+qq7l c ohx+n-a5/qk lectric field zero?

  Two point charges of +3.0 mC a ixr/i,zl2s kf6es*y: nd -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field /s6fzx:i*2r,yki l es at the point midway between them?

  Three 3.0 mC charges are at the three corne, xzs7r:6 bljqrs of a square of side 0.50 m. The last corner is occupied by a -3.0 mC chabz7xjrq,l6 s: rge. 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 th*a-okzcdlz w+/i 06ku e corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at k- d*cokil0awu/6z +z(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 itsx atw3 ,1sx4ded;b /*p(ukxs is placed in a uniform electric field. What xtdkpbsx34* xdau( s1;e , ws/is the magnitude of this electric field?

  A particle with a charjg4,ggoira89 f.:u e7y/my pege of 4.0 mC has 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 anju459hdl+d: - h syfcn5i5sou electric field of 6000 N/C pointing dods+ fisdu l:jyu-5hc55n9o h4 wnward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 n4exih (ib0u y/C. The ball is placed inside a uniform electric field, and is suspended againsy e4b/huixi( 0t the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charg -yc1gxph0m8re(uy.n e of +2.0 mC. What is the magnitude or18.yp x0 (umnhyc-ge f 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 is thez cst7wmzw,vtlz:76 uj 2 c+2n electric field 6.0 cm from the cen2z:, wtm2c wtnz 7s6u7czjl+vter of the sphere?