State the law of consl7ii4t s2e ex) 69anmaervation of electric charge.

  Is it possible for two negative charges to attract eveb dp-- 4ru,sk7;xwbach other?

  Is it possible for a positive and a negative charge to attract each other?bmt,o6l n ,cit79l 1kai4ip2l

  A glass rod is rubbed with a piece of silk. During the process the gloan noioe *w(t7ce/:0ass rod acquires a / o*7tai(non:e0ecw opositive charge and the silk

  A proton carries a

  The model of the atom1ywdh5py;j 3t shows a

  A neutral atom always ysx2 wz* t2hc3has

  An atom has more electrons than protons. The aa*p17h,/mw9q o9nc u qcfy/ ic:riqs.tom is

  Materials in which the electrons are bo uw 7l5-e(gpuai6lfy8und very tightly to the nuclei are referrw(5- 6aepugyiu 7 llf8ed to as

  Materials in which theg5 z 5wzc nm,*j f0volt)wp7rn0q2g: o electrons are bound very loosely to the nuclei and can move about f o5)nw7wgv cf5zn 2zpr:,0m0g tojl*qreely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharg9m3gu1, fxpn 7d3b nxsed metal bar. The end of the metal barb un, 7393 pxdsgfxm1n farthest from the charged rod will be charged

  Sphere A carries a net pos6 bx un5;jrx p3ll0b8sitive charge, and sphere B is neutral. They are placed near each other on an insulatednpb0 j;68bll 5r xuxs3 table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chazo7* /(l lg/v6ghwt vemwo2g (rge an electroscope positively?

  An originally neutral electroscope is briefly touchl1s)zwwmlm10 +cyf; ued with a positively charged glylc0l +zs uww f1m;1m)ass rod. The electroscope

  An originally neutral electroscope is grounkvf ,yk.vpc.h2 ;euo:ded briefly while a positively charged glass rod 2 hkk,f ;v.u cpevo.y:is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves / rdv4wqaw( s.separate. Then a negative object is brought near the elecrqs4d a/wv w(.troscope, but does not touch it. What happens to the leaves?

  A large negatively charged17yeuo08 m:qrivi0i p 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 object. At no time does either ball touch the negative objep1u008y e rv7o:mqii ict. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb gy(mbk 1sutjsic 1av6.p,5t5 constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fir 9ddhmx5hu 57cst charge is larger in magnitude than the second cha9h xuh 5c75dmdrge.

  Sphere A carries a net charge and spheropwvc ;hp ;gl5(2y n-se B is neutral. They are placed near each other on an insulated table. Which statement best describes the elec(;scvhnp y5g p2wl- ;otrostatic force between them?

  Two charged objects attract each other with a certain forc-bzipj5ku16(v.oq/i h w p:l te. If the charges on both objects are doublt:6 p ijhi5-(kb/qvzol.wpu1 ed with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutua/ive mg .l cn;8(6ypcgl attractive forces of F on each other. yeigv;6 g(8mp /.nlcc If 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 F.j1s + ee)al1lk What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one ls+1kee)l1aj -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 happens to pcpecje8g, -9the magnitude of the force on the proton if a second electron is placed next to the first electc 8ce-jp ,peg9ron?

  An electron and a proton are separated by ldpc35l2e ,bi tm+6ei 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 toi+ 6cmt b5 lid3l,e2ep the proton?

  An electron and a proton are separt gzv9h177g gcated by a distance of 1.0 m. What happens to the size ofg 7zg7g1htvc9 the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q i t3;w20.26ry 9ilnxakqtc8kjg o4opc s placed at the center 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 j3q 2w08 tcaicolyx2. k6 t9pnro 4kg;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 thebf pd. ph1fxge(y)4.y centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostabp f(1dpe. x.yhf y)4gtic 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 6w(5 c kcom(j56kydm3xrzb.yvector?

  At twice the distance from a point charge, t:j rn;le s ;5jvm8rlv,he strength of the electric field

  Is it possible to have a zer m* 86pg8ekmmc15zizto electric field value between a negative and positive charge along the line joini 88i z6kgmz1m pte5*cmng the two charges?

  Is it possible to have a zero electric field value betci+tnt 8m 3jn:n0,flr wbv .s,ween two positive charges along the line joining the two n cb:t, iw3 nrmv+jf.,n8lts0charges?

  Electric field lines near psiti)6c a+km us;htve point charges

  The electric field s nm/hmf 9r9ce5hown

  Can electric field lines intersect in frepz ,ihjj) 8bvrf28t*5r fg, one space?

  A solid block of metal in electrostatic equilibrium is placed in a unio/d :;rtc i 8:bz+u(jyv pzas1form electric field. Give a statement concerning the electric field in the block's inter:viuarjt8(p b+:o/zz;c yd1 sior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eacvnfq :( ahme.di3r, ;ph given the same charge, the electric field (E) midway between tnh: a.m3;(qfdv,r iephe center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wherpq6q1*xgur*pr c)w:y:cxj*r a; rr q,e a uniform electric field is directed straight upj6: px,w: xy ca* uqpr;qr*r1rqr)*cgward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electr2 l -kg80w,wg/eg0z b eyca7rrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is gri7-)z. 7re7+ gt s ocem06gsbee:geix ounded. As compg):ieb 7irx0e6 eec.s7s-g zotm ge+7 ared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriumn .5dkte fja,qk0 b5x d7l2xfam: (/hr.

State Gauss's law.

  The charge carried b z dl6ucac4sxlf /7,h7y one 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 +2.00 mC. Hp9-,rk-ymh4ihnpf +1p pw m,kow many more protons than electrons doesi1pyw,rk m,9hpkn- + ppfh4m- this piece of plastic have?

  What is the charge on 1 kg of prtf55s98pmec*z g;r ao v(a1ce otons?

  An atomic nucleus has a charge * dg6hpitk a2u k0bf;rgd7f87of $+40e$. 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 ay;ql92( ap l4 uhalzz8nd -4.0 mC, respectively. What is the magnitude of the electric force betwuz8a; 4a(9qzll2y hp leen them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1(v zg at gneb3hn57q )k4w:ab,.0 N. What is the magnitude of the second charge?e7 nk5(a4,zwg g) :vbhqnbat3

  Two 1.0-C charges have a force between them of 1.0 N. How far apart r1p yxj/ dgx;q4rkc02 lp-w2tare they?

  The force between a 87j4b13jahgvis23ftu m:ot*e oe* lf$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially +(t7io nfgyy-9x xw-c2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, whnigct+w- 7fyy xox -9(at is the electric force between them?

  Three identical point chfig915uh *9jh.ndqkr/ 3i xz 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 directionfkx3i nq /h5 u9ihd 1rz9.hgj* of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placs/scs( p9 ;axc qt-hx/ed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at ths;- xq(th//css9p c axe 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 usdvmpeyq9 toqr ;bs21*83h9located 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 = -1.00 m. What is the magnitude of t m pt;sy9o*qhv2 rsqb1ed3 u98he force on the 3.00-mC charge?

  A point charge of +Q is pq3erb h21cv9q laced 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 Ne1r 3qhb92vqc 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 rg/,n/ y3yy :li zpds1nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the mpy d, :yri/nz 1g3ls/yagnitude of the 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 = 5.0 nC is at/p pvqz9w 8vs/g f7(ypzl8s* m (0, 0). What is thep* 9vmywszf/ g(p78s lpzvq/8 direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are pprb q7; m;spv*laced at the vertices of an equilateral triangle whicpr7;vsp* mqb ;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, which are separa11tp3 v9 hkqmpa 08 +e3luquqwted 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 force acting on it would be zer0+h vp 13tl38qwqmqau k9eu1p o?

  A +3.0-C charge is at the origin and a +9.0mgj8(q3tf)oexj x *v c5tfm ym5 :i-n(-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so o xg(mt -m)c5m i*jqny f:8( f35vtxjethe net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x ,7:v*j2frrtf veapfq6: mpi- = 2a. Where can a third positive charge +q be placedeqrpf7 fm6v * ,2vjt:-irf: ap so that the force on it is zero?

  A copper penny has a mass ofe.wmrcaxlx:y 9 3rq69 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 gra szf x.+eu8z-sz y9qo:vity by the attraction of a fixed proton some distance above it. How far above the elxyqz -9uf:s 8e zo.+zsectron is the proton?

  Two 0.20-g metal spheres are hung from a*,:bsmer/ lzfbw:xkcb8 +ec 4 jm..me common point by nonconducting threads whicek48m+/b: lcm.jre* w:b cefxb s,z.mh are 30 cm long. 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 magnitude i0dqt x6 ,0m1 fxr ;g(jl1.5cmfkdt tiof the electric field at a di.i5r(gxxd61lk ci1t tq0,f 0 f;mjtd mstance of 1.0 m from the nucleus?

  What are the magnitude a pr nregs-fkj xp8tq94,untpx*- x7-,nd direction of the electric field at a distance of 1.50 m from a 50.0-nC grn xqeks,p,x 7jtf--x - ru84pt*9n p charge?

  A 5.0-C charge is 10 m fx9e )0 owwmdjf440u ru.n czc,rom a small test charge. What is the magnitude of the ele) ezr04.fm w ,cjcw4xn0ou du9ctric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small tefyhn 26:xm .lr* myqe5st charge. What is the direction of the electr mxh5:.*enmy6qyf r 2lic field?

  A 5.0-C charge is 10 m from a small test charge. What is the mff pq(fp*/k z:agnitude of the force experienced by a 1.0 nC ch:f q/zf fp*(kparge placed at the location of the test charge?

  Two point charges eax )y,rysx1uo/ch have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electrixx ru)yy/ o,1sc field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a mete6zb q8x*o 4vfjrsx9w+ r stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electri jxsz*r8wq+v 9 fx4ob6c field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick qk7c )8sj-yj sand a -4.0 mC charge is placed at the 50 cm7)ks- sqcjjy8 mark. 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 plapraj7, g2d4vu ced at x = 0 and x = 0.20 m. What is the magnitude of the electric field a vd,4pja72 rgut the point midway between them?

  Three 3.0 mC charges are at the three corners of a square 3 6e1 0r;fxvpbv)r6hiw7fp. hu vn2ad of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fin 1i6p7we x.fadvb6r)vnuv; h20 pf3 hrd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charcw-h s vt4gw 40z.,/roku3d tages are placed at the corners of the squar,a.rsz/g43 w4 0cwuvh-odt tke 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 square's center?

  A force of 10 N acts on a char)3h4j wbcwe/mge of 5.0 mC when it is placed in a uniform electric field. What is the magnijwec3/hb m) 4wtude of this electric field?

  A particle with a charge of 4.0 mC has a masscv/ l +nmgvy87 th32ij 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 fiiv 3qrp 7id:f)xk *:0.120 g is placed in an electric field of 6000 N/C pointing downward.i *:)i:f 7p rdvkf3qxi 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 nC. The ball is plac+/k swn94d5r +4g))xw b feklxbn 9ezoed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the eleczbw+o+44kd )9 b k9wf)xrsn/eln xe5gtric field?

  A metal sphere of radius 10 cm a/l.r,cwn;ye carries a charge of +2.0 mC. What is the magnitude of the electric fie,aye;c/wr.l nld 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cxhn(1)e (m mbac cyw;l;e w21am carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphereaebh(2m )myc cx e1n;(waw;l 1?