State the law of conservation of electric chargeiruiznu 945 .xb1oh 8n.

  Is it possible for two negative charges to attract each otherrs gf.i-u; 1mafhi .2e?

  Is it possible for a positive and a negative charge to attract each(++fmpk /wgtq yz7r +cral9 y4 other?

  A glass rod is rubbed with a piece of silk. During the process the glay /c 94 *jhabjctpz*jord f8 l9b8-k0tss rod acquires a positive ch4j bya/pjr8ftt l98 cd9*job0zck h -*arge and the silk

  A proton carries a

  The model of the atom shomqjbntg +u 8bb(bm.14 ws a

  A neutral atom always;xn fku 8+p,vs has

  An atom has more electrlvox+5w +u 3erons than protons. The atom is

  Materials in which the electrons are bound very tightly to th(c/krwt6.f y fe nuclei are referred f6.tk( r/cyfw to as

  Materials in which the electrons are b78p/+0htwr*qdwd mex wgq:1sound very loosely to the nuclei and can move about freely within gmwsw0hrw* q1:e+/p 7dt 8 qdxthe material are referred to as

  A negatively charged rod is brought near one end of a9 ztu3c*e4 zjmn uncharged metal bar. The end of the metal bar fartzc*em jt3 9uz4hest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Tdr. htnksqs2/,znk,6vbg27x 37ci xm hey are placed near each other on an insulated table. Sphe6/,,zvr 2bks q k7d.gn7sn3tmx2xcihre B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively c,7z5g/pm bk 8oe7tlm vharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivelyehsf y.mql.4vzn x:cnku0 3)/ charged glassfvq yh03 nmexl)suzn.:k c4/. rod. The electroscope

  An originally neutral electroscope diadj::j ia+)gp. 4j8(ebenuis grounded briefly while a positively charged glass rod is held nearje +4b)ap8(:uda:ndgj.i iej it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leavesn 5x l3*:qp j*raaq8fs separate. Then a negative object is brought near the electroscope, fa* 3qs*j5nax:8lqpr but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. 4xl6pds; pd 7n(6ipc a 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, ani6lnp 476dp;x (acp dsd 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 Coult +7um/d7i xatomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge 2qsur2:wie :ois larger in magnitude than thi2qrs: : 2ueowe second charge.

  Sphere A carries a net charge and sphere B is neutral. They aryha yg1x7-pq9yr. l , gth:bm:e placed near each other on an insulated table. Which statement best describes the electrostq1gy .,hy 7m :axr-yghtl9pb :atic force between them?

  Two charged objects attract each other with a certain forcerbf c -wqba) :+p).olkh8+o ub. If the charges on both objects are dou+puf8o) )lah+ o b b:cqwr.-kbbled with no change in separation, the force between them

  Two charges are separated by a didqv)c s7j8ljm )y6v 5pstance d and exert mutual attractive forces of F on each other. Ip) 6ycv 7)vq 8jlm5dsjf the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force Ff3.orr0 xm ro;kn/7rz. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their cenzr. /f r;3o7rok0rx nmters 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. What h5p,af7 zdc 0 5*xypfvkappens to the magnitude of the force on the proton if a second electron is placed next t7 ,*cfdpa55zf v 0yxpko the first electron?

  An electron and a proton are separated by a disth fv,fvgud48xt lhu153)lc6 v ance of 1.0 m. What happens to the magnitu g8l,v6h43ctu xld)ufvh 51fvde of the force on the first electron if a second electron is placed next to the proton?

  An electron and a pro4kn,cwp +ib z: dfdc52ton are separated by a distance of 1.0 m. What happens to the size of the force on the proton if cz5+wn4c: ,bkf2ip ddthe electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the centec/.mbqisn8. vf 6fb3it;t6x mr of a square. When a second point ch/ svbftxnci;.q6m6btf3i .8marge 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 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 centrop,ug 3cd*,+ sb or9xuuid of an equilateral triangle. When a second charge of +Q is placed at one of the3*+9 xugp ,,cbusdoru 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 is not a vea8c 8oa s,ha:t,bvq,u9n+s bf ctor?

  At twice the distance from a point charge, the strength of the electric-,p zfrp1pi3c field

  Is it possible to have a zero eleci ymn hekom(( bx4yen;)7o07,dj cr2l tric field value between a negative and positive charge along the line joinode0y n24mx7ine yrcj, m7((koh;lb)ing the two charges?

  Is it possible to have a zero electric field valco +v j*7f7xl y3owq l/e8*atzue between two positive charges along the line joining thez3/xac*ywvo+7 jle* qto7f8l two charges?

  Electric field lines near psitive poinqzx)o3y0(mer 7(ww62dgam/ fl -2osky up ft0t charges

  The electric field shownm, pql 2h4)jtz r;nkbrs*s,r (

  Can electric field li fb+ol0pdsf)c tmj lp.o6i 7vut7-8.snes intersect in free space?

  A solid block of metal in electrostatic equilibrium is pl8t ): orv/p6fcr fsu65qb ,zkiaced in a uniform electric field. Give a statement conce,f86u 6 ibrrs: z)fvc /qt5pokrning the electric field in the block's interior.

  If a solid metal sphere and9) 6ldi4-c nf vnsk;wp a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) mis-k)d9l 6nwvpn;f c4idway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniforo 9,.4,wnq wkjszk29-ildye g m electric field is directed sjkl,ozedk-i9 2ng.94,wq swytraight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near ;q3pn.eyeju3 an electric charge

  A positive point charge is enclosed in a hollow metallic spher .bcf nq+o2h5le that is grounded. As compared to the c5f bl+qon 2.hcase without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of cowe z)*j7e78s2a t rpxsnductors in static equilibrium.

State Gauss's law.

  The charge carried by one o mf07gt7v)u:i hd j:cza l)c,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 chargxnbj6j9 ic(s+hk, *z ke of +2.00 mC. How many more protons than electro*khcnb k(+sz ,96j ixjns does this piece of plastic have?

  What is the charge orm,p zl+)spf* n 1 kg of protons?

  An atomic nucleus has a chaq4we0mlc 72h;d;ofl brge 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 of 2.0 ahonjw 9z92moq 9c+z3 znd -4.0 mC, respectively. What 9qmc9ooz+3j nhz9z w2 is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the forcesb8ydt mw/l. .siwy:3 between them is 1.0 N. w/ysitwysb.:l38.dm What is the magnitude of the second charge?

  Two 1.0-C charges have a g bl:sk/6m bhn ;snb11force between them of 1.0 N. How far apart are they?

  The force between a nh2tz:yykb v w:(z snd9e; ;;a$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.dbkxjhkn)v ;5 6sf qyz:4k y1.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the sk56zv;:y4 kdh b xk 1yf.nqj)electric force between them?

  Three identical point charges of 2.0 mC ar +gs/ru* unf/i4x4 jvpeq-;75oei ep ae placed on the x-axis. The first charge is at the origiq5ir4p/faj xi 47+nup/-v u*eeog; s en, 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 acts on the charge at the origin?

  Three point charges are placed on the x-axis. 4 n,clys*u tct42pu)l 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. nlyl4 t)c2ups tu,* c4What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located a,ymw cv gk74quq.osy(7 5vrr417qmch t 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.mgy. skq7cu4yhc4(7qorqmwr v v5,1 700 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed aph rjeydf 5u y7b9x9vw/g./, ft the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observrfu7/yjyf,5 vg /h px.9d9bweed 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 = -6no z i;5)wt xpyu4h5i1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on thexz h6ow)t4piu5n; yi 5 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC mfb2a 8ztfc f1s +*zc:hxsiowh:/2:tis at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net bfm:2*fsw2t1z 8:f hc oct/as ihz+:x force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the n7arx.49 ky kmws4f1s b d2g1znv1t6evertices of an equilateral trian 612mw tae.d v17f zknrk1ssg4ybn 9x4gle which 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, which are separated by 3.0 m. At wy dq 6l-dyt81uhat point, on a line between the two charges, woulddu1 ltq yy68-d 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 origin and a 9d knk./w lflwir2)25 qzbi s.+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third b w.i9dis52/k r2 w)lfkzqn .lcharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.s .sej;)+do tz +ki-pwfg;g* a Where can a third positive charge +q be placed so that the fodij+*pw.eg)o fs; + g-t;aks zrce on it is zero?

  A copper penny has a mass of 3.0 g. A toty qf(p-nj; nf6al 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 aq c i*6n x9tnj7nha1+ngainst the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the pn 6qin*x7ajnthn9 c1+ roton?

  Two 0.20-g metal spheres are hfmwid,ysq0. .( 3kc jtung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between tdq w .ksm(c.ji3t0f ,yhe threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the mo6m: pad02tc vagnitude of the electric field at ap 0o:2tc6 davm distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a k0 m dzecg; rqg9d(a)0distance of 1.50 m from a 50.0-nC charge kd)(; dmeqcg9a0 rgz0?

  A 5.0-C charge is 10 m from a small test charge. Wham6pecm5 n5k) (fa 5bepe- 7zobt is the magnitude of the e6)mb5-fbpea(mcekp5e z7o n 5lectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. s i em -+z0/ ypmp2f,z0jtjj,r What is the direction of the electrj,+ t2sf, rm ze/ j-zyimjp00pic field?

  A 5.0-C charge is 10 m from a smalldg alinv r0 )d2s:0:;wi )yeg)b sdkr; test charge. What is the magnitude of the force experienced by a 1.:;rg0dgs bs))ild: a0e;wydvn )kri 2 0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated bycjy6 4xhy/ t /,ihp0gf a distance of 4.0 m. What is the electric field at a point midway between the two charg g0c/ht64yjyhfp/ i, xes?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sticdhh1nx-45 *vctg8faf ii*6 cgk and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mfic4c gd-165ga8hvf* i t*x nhark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 si0hoxy/spng g:0l**- sph2 ,m + dvvzmC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electr d:xslpy/0,- n2pg0sz hoivm **+gsh vic field zero?

  Two point charges of +3.0 mC and -7.0 mC are pla9ma2 pm.fi7wn ced at x = 0 and x = 0.20 m. What is mnm w92 f7a.ipthe magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three cornerz; vbwe+7,pnue t58vns of a square of side 0.50 m. The last cornzve 5,+;b8v7teuwnp n er 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 px4ogc,cm : /yl e,7ehside. 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 fie co7e x ph,:/4myc,elgld at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform electvau;kei/fnu k(; mht, 59obi;ric field. What is the ma ohk 9fa5 /(ve,nkub;umiit ;;gnitude of this electric field?

  A particle with a charge of 4.0c c n/+k-md xo;tq)c p8c 6y7ebd3fxt: 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 ar+sn .ypk(ob(ez,d)tx2)rqu n electric field of 6000 N/C pointing downward. What charge must be placednrubd,)o pxz( q2rey(s. tk+) on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed infs65w/:ma5ykap7owpw h*bcw ,ny +/ qside a uniform electric field, and is suspended against the fo5wy 5qs */aapy, nwwfk/h m6 +wb7cpo:rce 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. What is the ma) fbe5bhaj,ax. d5p s5gnitude of the elec,5 .b)a5epbxjh f5ds atric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chj 7x-py/k)fnr4o 5ckwr ,vsb 3arge of 3.0 mC. What is the electric field 6.0 cm from th,fjkxo y 7crs r-p) 5wnk4/b3ve center of the sphere?