State the law of conservation of electric m4/nk4(8ahmknn p+gb g r1c*acharge.

  Is it possible for two negative charges to attract eag gylcca+v;p,vq2 m.3:gmhr- ch other?

  Is it possible for a positive and a negative charge to attract each othebf56:zp3b jk1xdd ;c ar?

  A glass rod is rubbed with a piece of silk. During the procesr3 5 7cjejc;.fx6zl2dy g4mnps the glass rod acquires a positive charge and the s;cj3j 4 .2cngeml675d pr fzxyilk

  A proton carries a

  The model of the atom shoj 4uk( hijmj 8f+r1n:wws a

  A neutral atom always cmaqr0g. w 8cb69a 1rus.)ctfhas

  An atom has more electrons than pxl -jfu-1gi0 vrotons. The atom is

  Materials in which the electrons are etht ouh7s-,q11g9xe bound very tightly to the nuclei are referred s11g79het u ox-t h,eqto as

  Materials in which the electrons are bok: f(yy9 /7xq9bbmam le l :h,yalf45jund very loosely to the nuclei and can move about freely within the material are reyjbeklm( 4l h:5 yafmyl :7f,ax9bq9/ferred to as

  A negatively charged rod is brought near one end of an os6w k pbe4/7x+lpi,xuncharged metal bar. The end of the metal bar farthest from the charged rod will b6p 47+,l/bokx ep wsixe charged

  Sphere A carries a net poq, jtocbipn3) b4m)v 6xh8b6t6 e*qqesitive charge, and sphere B is neutral. They are placed near each other oqq8,t6 mhien px3c6tevb4) *)j 6bbqon an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an ele-yoe j.by3,mhpecgavf ,lu703-/ u 3k8qyivectroscope positively?

  An originally neutral elecdmg-g 9a ;.kddtroscope is briefly touched with a positively charged glass rod. The electroscopeg9dd ;d -.amkg

  An originally neutral electroscope is grounded brid*xly:(;p*fj 2kwqt pefly while a positively charged glass rod is held near it. After the glass rod is remo(wjy**t2 q;lx k:pf dpved, the electroscope

  A positive object touches a neutral electroscope, and the leaves separa91texl qad8ra:+ gl; lte. Then a negative object is brought near the electroscope, but does :r ld+1tl8;ge xa9qalnot touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatef i 1f(afaxhv v+2j76od table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A sevofv+j1f(a f6hi x7a2cond 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 Coulomb co:938kkaw k3o isbwbl 5nstant $k$, which appears in Coulomb's law?

  Two charged objects are separppub2 0 oc0 *2m)g(cgloj9l kpated by a distance d. The first charge is larger in magnitude)9lp2p(200okl ugo pcjgb mc * than the second charge.

  Sphere A carries a net charge and sphere B ;pee 8wu7dvm ovs94 4** qxml.uy w*wtis neutral. They are placed near each other on an insulated table. Which statement best *syuvx9wpv ;8wt d weq m4*ole.u*m74 describes the electrostatic force between them?

  Two charged objects attract each other with a certain 4wkck -fau 3,vforce. If the charges on both objects are doubled with no change in separation, the force betweenvuwkk,-fac3 4 them

  Two charges are separated by a distance d and exert mutual attractive forcn8n a3zc25)e5 d q6nesu ggzf8es of F on each other. If the charges are separated by a distance of d/3, what are th 6szee88ndfu5g)2q z 3g cnn5ae new mutual forces?

  Two charged objects attract e ;ix(yf-(ntcnach other with a force F. What happens to the force btc(i x-;(y nnfetween them if one charge is doubled, the other charge is tripled, 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 proton are separatem0 flv2u;4 yzyd by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a s;f2ly4zvmu0 yecond electron is placed next to the first electron?

  An electron and a proton aretin(l d m8xmmi0ee6/l+ 8lo/q separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is plmldq(to6 /8xm e i+l8i0enlm /aced next to the proton?

  An electron and a proton are separated by a dislz*fh/b(fzj d8 9 e*8xz, 6;lo qztzgctance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 c*zhbzeltzq*/ozx z8 8,g(; l6dffj 9m closer to the proton?

  A point charge of +Q is placed at the center ofua cjm50)pd gh: g :4sfku-tk; 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 placed at the other three corners of the square. What i u0u h k:-gd gk)45tafpcj;:sms 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 triangl16slci h/ch5h qrqz0 5e. When a second charge of +Q is placed at one of the trianglc5c 0i qhhsqhz6r1/l5e'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 ;w fnw+ 3,g:hfukz*xxrda0z . not a vector?

  At twice the distance from a point charge, kh2 pf,;m0 azkthe strength of the electric field

  Is it possible to have a zero electric field value betwec)(stw9vb:x7p 3nwm v en a negative and positive charge along :csxwv mv7)n( 9twb3 pthe line joining the two charges?

  Is it possible to have a zero electric field value between two positive charge;5 oh 2hyc(rkqhk7/wks along the line joi who2/k;ch hr(kk q5y7ning the two charges?

  Electric field lines near psitive point ch) -heznyuwk (hi,zl26arges

  The electric field shc4w(rj :hw.y) z 9gvxix zso(r8fqy2;own

  Can electric field lines intersect in .iuuc2o8. sswje + 4vjfree space?

  A solid block of metal in electrostatic eq(jpq qq41 lhb98lg3xnuilibrium is placed in a uniform electric field. Give a statement conce q41gj qqnbpl8hl9x 3(rning the electric field in the block's interior.

  If a solid metal sphere and a hollow metalvf e)c;m1/ auk-/ pxl;vsz*kts.) kcq sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the s)qa ;vfkzu)x 1pcvkt s;-.cel /k/m*surface is

  A cubic block of aluminum rests on a wooden table in a region where a uni wkdr8caw*5: +w)a7trwhm v0 aform elc)vk0wh*+tm a: w87rdwa awr5ectric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilib/nz n/5e cwmtx5xfr17 cslc. :rium near an electric charge

  A positive point charge is enclu6 dhzjo *)6lbosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere*luzdh)b6 o6j has

State three properties k c6f:8)iw3(uu ruifz ;iin 2cof conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is hbwn 0xgmf2.1$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2.r:k phf(-p hwh.;v/b7z m-p zc00 mC. How many more protons than electrons does this piec - 7mrv.-(zphwkc;zp/f:h pbhe of plastic have?

  What is the charge o 1 zujghl81g.nn 1 kg of protons?

  An atomic nucleus has a charge oh8tu wco9d* -pf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sep*ys2k+q dh zwyl,8q36 arzm4t arated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respe6*y4rlzq32,zyamhw tq 8k sd+ ctively. 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 them is 1.0*j*,e ln/ix w1 x0qhyc :hffu7 N. What is the magnitu: *x efjlhh0 cy,wunf71 i*/qxde of the second charge?

  Two 1.0-C charges has2 ,kyxt k)azgqppt : xng+je/9n-56fve a force between them of 1.0 N. How far apart are they?

  The force between a j x0so )6z+:4rv*hp 3 ob(tom mbxjol.$30 \; mC$ 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-Nwq 0k5ax/r no9 force. If they are moved to a new separation of 8.0 cm, what is the electric force between/wqx5r0 o a9nk them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Th/zdf: /wa nnv0q.h7f+ u:e cwve 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 d w/q .v0hn/:fezv7+uf:cawdn irection 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 placedpss9rdh 8 1mkm*c*6dl 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 e6rd*1chlpm9sk *m8d slectrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positih 3lwr61ftv(j ons: 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 the force on the 3.00-mC cha6jvhl(wr1 t3frge?

  A point charge of +Q is placed at the center of a square, and a second pointmf /ycz0 m(l7s 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 on the center charge if a third charge of -Q is placed at the lower-left 0lsmm7c (/zfy corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q223csn ) svns8ww);gs(yhob2j1ld3heoue 8 ( c = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net foj1(lc(hon oy d h)s8;s2ngws28vce b )sw3e 3urce 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 ir-75n fb :jemsm/id0zs at (0, 0). What is the direction of the net force on tm5f0: drbnm ze-ij/ 7she 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices or,b8szm5c hjplh3d67 f an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of t s,lzb crpd38hh m56j7he charges?

  Consider point charges of +Q and +4Q, which are separated by;bnb0j)f ov8:brthp gs *nu89 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 ze8)9nb:bg ; ps8obh *jfnt0 vurro?

  A +3.0-C charge is at tedp+ti()p0gr rvea 95 he 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 forceip)g0e5+reatd( 9prv on it is zero?

  Charge +2q is placed at the origin and charge -q is placed iwv5 4xx ;ww*pat x = 2a. Where can a third positive charge +q be placed so that the force on it isw* ;wxvpiw x45 zero?

  A copper penny has a mass of 3.0 g. A :3dp5jv k8*2jkfi)e u+pffrweyc7/ ktotal 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 2 hmdvju7cu 98the attraction of a fixed proton some distance above it. How far above the electron is dm jhuv7cu298the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducti o,ko/xoqkp 3h:4* qcjng threads which are 30 cm long. Both are given identical chargeckp:,o q o*okjq/x34h s, 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 chargej))zy96ue kw t of +40e. What is the magnitude of the electric field at a distance kj )y6z9)uwte of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of 1.qwk2 :t (q(ybt50 m kq2tt(q (:wyb from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small tesb5r.c/xj iblq, g7sm (t charge. What is the magnitude of the electric field at the ljb7gc 5sq ,l(/im.xrbocation of the test charge?

  A 5.0-C charge is 10 m from a smdcq;/o 2t 4lb*fx nc9wall test charge. What is the direction of the ele w/*b4c;d f9x oq2ctlnctric field?

  A 5.0-C charge is 10 td9zu 5;,or+onwmbgzr,f/ g -zr(lc8m from a small test charge. What is the magnitude of the force experienced - 9(c rgr8 ,dm;zf,bz/tr5og o +lzunwby a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C eyqdc2y 0ey,vo j8t 55ttg6/n and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two chndvyt ej6 5y 8y,eg5/o0t2qc targes?

  A 5.0-mC charge is placed at the 0 cm mar b,.exui)v;fb k of a meter stick and a -4.0 mC charge is placed at the 50 ;b.uve bix,f) cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a/m nybj zov4d/tfx, c2*td7k* -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the e*mc*,vt7n4zt y/f okj/ d x2bdlectric field zero?

  Two point charges of +3.01q vrg5fc*2tni9lfq; mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magn5* ft rlqiq12vfg9;ncitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of 5dqws -4nrny c h4zry:44*a bvside 0.50 m. The last corner is occupied by a -3.0 mC charge. Fin5yra 44qv nb:4wcszn-ydh *4 rd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are plac;9qnbl: hq.ztst x4ne a7al/6ed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); :stah x7e9t l; blqznn4/.q6 a+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 wh+yqs9*cz/ w0se hgw a5en it is placed in a uniform electric field. What is gy*w+/ewc 905hsaqzs the magnitude of this electric field?

  A particle with a charge1x)jnmvyyn6f) s3s(.z5zpr h 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 04 8gn/7e2 chwkz1/axckyr s 8y.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to bewg/x8 y h 7yk1cars428eznck/ suspended?

  A foam ball of mass 0.150 g carries a charge of -2nw8 zgyxie 1-86go6 m1wt8lfl.00 nC. The ball is placed inside a uniform electric tz 8w18nm ll1 f6oggixe6wy8- field, and is suspended against the force 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 -4sa:es3 9odrhhi15z edn)rev*u8p u the magnitudeh r8 uu 34p5v)rsh*a ez91sod:ed-n ie of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chalv2 i d208rdnl ,6ghgnrge of 3.0 mC. What is the electric field 6.0 cm from the center of t lhdgl0in dg6,v2rn8 2he sphere?