State the law of conservation t,+4aj87eovj ;kqlbx of electric charge.

  Is it possible for two negat 6)dac/yini:pa ;-f.p11e 1yg btazb mive charges to attract each other?

  Is it possible for a positive and a negative charge tu3daje +h:kp-g9 gp5ko attract each other?

  A glass rod is rubbed with a piece of silkjyvb4b d:u5y09d )b t.ilf wd,. During the process the glass rod acquires a poby b.tddl4w :d 0 v),iuyjf5b9sitive charge and the silk

  A proton carries a

  The model of the atom uu*dr d: ,l7k,xc6 xa vi*3 4h ymgr5,yltcnx9shows a

  A neutral atom alwayspol-qyi . *scs7- -g98drusmic +q2wt has

  An atom has more electron9.bwfrt raz. (s than protons. The atom is

  Materials in which the2esng 23w ifopei (i(i;er 7;h electrons are bound very tightly to the nuclei are referred 2e(e7 swoi;2 hn 3ipr e;ifgi(to as

  Materials in which the electrons are bound very loosel ;bc04)bol4 dbzptw0i y to the nuclei and can move about freely within the material artowz) l;4idb4pb00cbe referred to as

  A negatively charged rod is br )5popvmncx l258lt3g ought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will beom lgn c5lpx82p t35v) charged

  Sphere A carries a net positive charge, and sphere B is neutral. Txraoh fytl3o9jw*3wl73 2c1 z hey are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement ir ycw3h 3oz3j2*lto1l97a xwfs correct?

  How can a negatively charged rod chargqrgr jlf1281lcvfg4ytb9bd 26 zk 76ae an electroscope positively?

  An originally neutral electroscope is briefly tiy (n/kkd3g42e y7kejouched with a positively charged glass rod. j7( 2/y kekyegi3dn k4The electroscope

  An originally neutral electroscope is grounded briefly while a positi7vx4ea/rnjn(/ 3 p xrtvely charged g n/x3rav rn/xej(p47t lass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, ansrn3 lo*k-aen/ dk*c wl54y .bd the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Whnaly3k e*4 nlodscb5.kr w*-/at happens to the leaves?

  A large negatively charged object is placed on an insulatet( 2ky * xek06rq na,ey8vn+oed 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 tou8kanv(qe6*2oeexy kt, + r0nych 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 coi g2de5qvaa(+ nstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distans8axivg;s.8 .g 89esrdhrxk) ce d. The first charge is larger in magnitude than the secon.8x ;hakss )s8. dxivgrr98e gd charge.

  Sphere A carries a net ch)ke lah41vp* karge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between thl*4pa )k1vhekem?

  Two charged objects attract each other with a certain force. If the chnt8d,vhw rm:2ei;7kq jl06p q/kq l y9arges on both objects are doubled with no chang wlyv, /h;lpk762e kr0qiq qt9n:mj8de in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces of 2cc, kpu1n5 bes zy9k :nf6:jqF on each other. If the charges are separated by a distance of d/3, what are the new mkc9u1s ,fpn y:n ejb:5qkcz2 6utual forces?

  Two charged objects dogvt89 ,6u6 e90yq u0w zr t*6wdrmtcattract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, atrqz,u0g 6 m99vurw86dy 0cdtot6*ewnd 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 separated by a dikhtj+eza u,nz(xz304 k1.yns stance of 1.0 m. What happens to the magnitude of the force on the proton if a second ezk+z4 .zn0tanksx(eu3j 1y ,h lectron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happelg 2q) lu9w.ahns to the9h ua )qgll2.w magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are se( l*5 qji3 t05h*wbt l0phtxkqparated by a distance of 1.0 m. What happens to the size of the forchqb t5*qpl0w t5k3 *j0(litxhe on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at thl;agd a1.g u7we 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 placed at t g wd;a7u.lga1he 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 thef ;yi+xzv1b :f centroid 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+:bfifv;1zyx to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a r9w:woify;,k, :r5mkntw g d9ic+at 7 vector?

  At twice the distance from a point charge, trf ck)ni8)j 1fhe strength of the electric field

  Is it possible to ha o9,gbf ;sed1 aun18r ylti47s c7ggk-ve a zero electric field value between a negative and positiv84gr7n;y1-9ec7bso,su ag 1dg tfi lke charge along the line joining the two charges?

  Is it possible to have a zero electric field value between two posit5 rxh)h.;j okkive charges along t ;h5kx.j ro)hkhe line joining the two charges?

  Electric field lines near psitive p*aq5-yqb0uqf oint charges

  The electric field shownuzm+xw/ f5:ei f,rf. 3;oxlr;fmyo,m

  Can electric field lines intersect in free space? ty.w9 oph2r4j

  A solid block of metal in electrostatic equilibrium isglo cu4c 6y:+t placed in a uniform electric field. Give a statement concerning ot:c4 g6u+ lycthe electric field in the block's interior.

  If a solid metal sphere and a hollow met 1nm*r x4tc+yw/*htzl al sphere of equal diameters are each givz1lh nymctt+wrx* / 4*en the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a 5vobzy)f* vgkq5 m5g. uniform electric field is directed strq5o5 y)mfvvgg*k 5zb.aight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric ch ),ppmn2q q7e5u(g 8 uh+f43vqyjhb drarge

  A positive point charge is enclosed in a hollow metallic sphere that io5e3ljag9iy;ahbj1 1l 5z wm0s grounded. As compared to the case without the hollow sphere, the electri1jo lzb;e5ym13j9 lh5gawi a0c field at a point directly above the hollow sphere has

State three properties of conductors in sp5(8j:fo 6ay vgb2p a2ml1bxntatic equilibrium.

State Gauss's law.

  The charge carried by one electron is t9 sx0 0x,3njmunc0mt$e = -1.6 \times 10^{-19} \; C$. 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 y-s t)9atpfs4protons than electrons does this piece of plastic yst9s )p-a4 tfhave?

  What is the charge on 1 kg ofppzdf.w/1; rr protons?

  An atomic nucleus has a chvf35m6tbvg)xugg p (1*rv 0eb arge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1dua9drbh -g +g;,l1oweh9e 7b.5 cm, have charge values of 2.0 and -4.0 mC, respective 9,u1 ghoga+lbh9ewd-b ;7redly. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a s+:pqu5qeh8h7i8f 3ma;l(ms * sqfribecond charge, and the force between them is 1.0 N. What is the magnitude ofqs;37u8( rshi5hamf8*li :bf eq +pmq the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart 0: ntrjn7s5 geare they?

  The force between a v)soc4-uy d s09mx4e j$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apf hluhg1g43kivuy8*mkx /j89/peh)lts m77 xart, experience a 1.0-N force. If they are moved to a new separatioh89u *il/xgk3xe tvf4 m)g7us 1lm8p/h 7kjhyn 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 firs+v2pcr ,+yvhd7 g:uzl t 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 acts on the chadl+y,7 cu+vrvg : zp2hrge at the origin?

  Three point charges are pl6.wqok st;:xbn(/ fh cnp x*:waced on the x-axis. 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. What are the magnit n/: q(kwntp6hbx. s*foxwc ;:ude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the followivinq +dnjsmf7w) 8g /3ng 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 mn7)+nf/w 3jv8sdi qg the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square,o g7dzwys) y17 and 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 on the center charge if a third charge of -Q is )7ywsgd 7z1 oyplaced at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC ie-vip +f3,.nub1-w6fdx/shm 94k.sdtw chhp s at (0, 0). What is the magnitude of the net force on the 5.e.sx dk3ipc/s w bu vn ,w.hpf6 tm9h1df-+h-40 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m);u:;4 nbcu,2blt lg+pslam03 t Q3 = 5.0 nC is at (0, 0). What is ta m4l lu u2bstc,0bn 3lp+;g:the direction of the net force on the 5.0 nC charge?

  Three identical charges of m +ea0,s5 lm0n yn8dzwxr8 ;lv3.0 mC are placed at the vertices of 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,syn me0ad+mvlwx8nl 5;rz 08he charges?

  Consider point charges of +Q and +4a 2oew w+c 6z*n,vv zk(w4eq9uQ, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a chargcu9k,v2oa* zezewnq(+v46 wwe of -Q such that the electrostatic force 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 m. Where on7y qg5ddwx - vco t9z;e-kt28q the x-axis 2;wex8dtq k7c5-t9qo vzy -gdcan a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origsey hqra p*y y9nxp;864gq)(xin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that n;6 *a)pyye 8rs9(q4 xqpyxhgthe force on it is zero?

  A copper penny has a mass of 3.0 g. A totbj; 8(is0oiou)2n ukw * pp8mhal 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 of amty4ww/0v1wb fixed proton some distance abovey4w b/tv 0w1wm it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a colkp,cy6c(+p8 w8ck ef mmon point by nonconducting threads which are 30 cm long. Both are given ide8c , w+ecl6pf(kckyp8ntical 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 of the electric 1)wx+1 pjyedcfield at a dispw y e1)xc+1jdtance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a disgxl4*qw:/ ,p tcc k0(m3vngi wtance of 1.50 c 3 cp,/*v: g mg0nwq(4xwtlkim from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thx 6*gblzl+vo *p ,,9gp/wl3witji (oze electric field att,w3powzl +, 6loig *i /zl9j*bxpvg( the location of the test charge?

  A 5.0-C charge is 10 m from av5 makfz*1gogen dcy,s0),y ew1fa21 small test charge. What is the direction of the electc*f ezo21s ,ny1 mfgdk1a y0g)5wae,vric field?

  A 5.0-C charge is 10 m from a smau3cqzmizg z(z7(+i * kll test charge. What is the magnitude of the force expe37(c mz+(ii* z zkgzuqrienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.- p.lxjlvs3j+vl(4 f1rrq q2i;k3hep0 C and are separated by a distance of 4.0 m. What is1lsqx( k qj r erh3p.3v ;j2fipvl4+-l the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of cb7.*a kdnee-/7 n 2ppxyxge 1a meter stick and a -4.0 mC charge is placed at the 50 cmxpbekn17xa/-g*p nd2. e ye7c 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 andgfdco3),v0,u4ov rmvq7gv4 x bw 9ce8 a -4.0 mC charge is placed at the 50 cm mark. At what x9) 4mo0vvg,4rfu3dcwe q8,bo 7 gcvvpoint on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 zoxk0l/ys0( u mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the elect uskx 0ol/0y(zric field at the point midway between them?

  Three 3.0 mC charges a0t rcnq:q7e)are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field eat)q: 0r7qnc at the center of the square.

  Consider a square which is 1.0 m on a side.9xin w8s6 (,etb (-/dnwce ae(f fumg5 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);bdf t,(s5wf 6ux89cg ee(a-(ne /inw m -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 it is place0vr6 rq;ir . zdmg6ux7d in a uniform electric field. What is the magnitude of thirgd;6.rxvirmz 6u70q s electric field?

  A particle with a charge of 4.0 mC has a s q+wlq 15.nulmass 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 an electric field of 63lq1 u-,r( yoosl 4+kfhho xk)qbu89r000 N/C pointing downward. What charge must be placed on the,o-3+fux14 9oqq( ukb ykorlhs h8)rl ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. Tfg*x2sae- s ,63f-wktzzl e hqd7z31e he ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude a7e1f e-a,k2wzq sg z-xz3 hse3*fdt6 lnd direction of the electric field?

  A metal sphere of radiuaem:gr 8 5akx9m9)0boftx e5 f1lpw7 ds 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 xx:offl1ea9dbm )8ak5 wre5 9m70pt g cm from the sphere's surface?

  A metal sphere of radiypu:o25 s/cypus 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center opc 52ypus/y: of the sphere?