State the law of conservation of electrib3 ckak1b,iru):y +es c charge.

  Is it possible for two negative charges to attract each otho1rh4.vu4a6 / y :9vtjkd vtaf11p b 6l1wvzzrer?

  Is it possible for a positive and a negative charge to attract e l r q9ynccz993 dp,lcjvt/(n+ach other?

  A glass rod is rubbed with a piece of silk. During the process the af:wg8 da0y 01 ctuj)iglass rod acquires a positicj1yd ui w0a :)g08tafve charge and the silk

  A proton carries a

  The model of the atom: 5cesvu ogtz u8 3( 1rj:/a+iwrn0eya shows a

  A neutral atom alwayq7no hxdo y6, )h91q4qhgt*6 6ptz rxzs has

  An atom has more electrons than protons. The axrf8*2m. vgk/te8t xptom is

  Materials in which the electrons are bo:wje8m 8rkbx c-ch+ijb5-h 2jund very tightly to the nuclei are referred mjcch8x2ebh 5w +- :jbk-j8rito as

  Materials in which the electr*sjr +n( f sp)sz(cmwi3 ;xtq4ons are bound very loosely to the nuclei and can move about freely within the material are referred tofzsq4x (mptrn+;)( jwis* s3c as

  A negatively charged rod is brought near one end of an uncharged yw3*p1kg, r ,zrgj/pnmetal bar. The end of the/ krppg w*j,ngr,y z13 metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They ar7 gz1ilkd6-r ue placed near each other on an insulated table. Sphere B is briefly touchedlk61g- i7u dzr with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electr mp:g 0 0rqy7d7hwxn:- bp:nykoscope positively?

  An originally neutral electroscope is briefyb 7c w4c ago*jrjj26-ly touched with a positively charged glass r4o-*brc 7c2gy 6a wjjjod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chargkqn klkh5/ n*3ed glass rod is held near it. After the glass rod is removed, the en3qn5 / kk*khllectroscope

  A positive object touches a neutral electroscope, and c0ubjub d2 7o4t0m/bythe leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happyoj cubu7/2dm 04b0 tbens to the leaves?

  A large negatively charged *g1 7gwza*l(ih1jhm ly8qv q+ 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 p l1qaqy( 1lzgi7+h8*hvwmgj* ath 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 constanim(v5k ilikk;+go rqi6d, +- et $k$, which appears in Coulomb's law?

  Two charged objects are 2z,av8/vim jgaksdeec e1.25separated by a distance d. The first charge is larger in magnitude the2v5aev m/d i8kg c2z.ajs,e1 an the second charge.

  Sphere A carries a net charge and sphere B * n2s, 0bnootfis neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force betwee0f* bot,o ns2nn them?

  Two charged objects attract each other with a certain force. If the chargesanj e y6l25,es on both objects are doubled with no change in separation, the force b,ln25yjs6 a eeetween them

  Two charges are separated by a distance d and exert mutual attractive force ;k*qrje(: 3gs jvwt9zs of F on each other. If the charges are separj:9s; g 3z*rtk(qevjw ated by a distance of d/3, what are the new mutual forces?

  Two charged objects attra*g)x t 1kn/wqt58gpeect each other with a force F. 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-fourth its original value? The force is now equal togteeq8xwk/ tn*p15 ) g

  An electron and a proton are separated by a distance of 1.0 m. What happeeaq m,n/lg8fm,oqhvj;;z(t 6ns to the magnitude of the force ojv ;;,qlozae mg/6h8nt mf (,qn the proton if a second electron is placed next to the first electron?

  An electron and a proton are separl*crlouo 0, t6ated by 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 to the protonol,oc*0l 6urt ?

  An electron and a proton are separated by a distance of 1.0 m. What happmcr /wttif+gwi89q9 / ,5h 3e0 w2vehkfz fk0mens to the size of the force on the0k,fwc9t k/f0q5th3 w i9rvi2 z+w/8hemgmf e proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the centert/v1i91b+uiyu1 o iix 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 the other three corners of+yiivi 91/ui1bxotu1 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 centroid of an eq-e( ,apiq mkde9go*n5uilateral 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 q5e(oed*p- agmn9, kiis 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 x28ry2dk ,lerv y 3-ija vector?

  At twice the distance from mblnk, er,,xf5zp t ;2a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a nwh (nxojia8tyt0.um . 2ybsu b0ah4 56egative and positive m0ujbs u.b hty4 x6 8hyaa5no(.it0w2charge along the line joining the two charges?

  Is it possible to have a ze63;;tk n ps8cfa fpbq889hmue ro electric field value between two positive charges along the line joining thn8es;tb9f8q83f hapup 6c; mke two charges?

  Electric field lines nearq 1 rc4p dvhn,z.l(y5d/cb.qr psitive point charges

  The electric field sho ap z1c 0tb04)kbnt mdl30or)wwn

  Can electric field lines intersect in f03kod+mvn2j1e n em/hree space?

  A solid block of metal in electrostatic equi,qnoh6.igm f6wb e c(jl19c.a librium is placed in a uniform electric field. Giv.w6jmc ef.ci6olaqh9gb(1 n,e a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal spherc nx t ,d9)do rqha/57*rm +jnvcy.pj6e of equal diameters are each given the same djnohvm*,x 9 a)yr. 5crct7d+nqj /6p 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 regia(gv8 f7/ es jq9p,ma15dymrnig/l i, on where a uniform electric field is directed straight upward. What can be said crg(gm9,5l aay1nvij/8fqedp m,7 is/oncerning the charge on the block's top surface?

  If a conductor is in electrostatic equiow(m1* hw73+dq iv(zx p, k 0kduvveo8librium near an electric charge

  A positive point charge i umk twrlq:y7m8l-15j s enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hq:uj1tm5 l rmyl-k8w7ollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of condup rr 7+mrih67octors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is h2goa0nk- v . :pyzin -xn.x9q$e = -1.6 \times 10^{-19} \; C$. 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. o + g; .u:gzt)pnpf,aw How many more protons than electrons does this piece of plasticwa;+ .t)uzg ,np gfo:p have?

  What is the charge on 1 kg ofb-,tgsotsh ay-61elkh9. b;w protons?

  An atomic nucleus has dm9bjzk gz3j 4v+v /ae4j8)a ya charge 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(8t+ dgz-fxby, have charge values of 2.0 and -4.0 mC, respectively.yf +-8zgdt(xb What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a secom eoj+gghs +3 w+r/l7pnd charge, and the force between them is 1.0 N. What is the magnitude of /hpm lsj7egwg+ r3o++the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are-d;vorb,gj 7o 0ffvw* they?

  The force between a 3-e-wv1gysyf $30 \; mC$ 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.)x)t.8n ntkd z0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betk t )xzn)8d.ntween them?

  Three identical point charges of 2.0*scwbz. .xru: 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 direction of the electrostatic force which acts on thecu x.z: .r*bsw charge at the origin?

  Three point charges are placeq,)l0udb ( u..couwjj8;o 7tbf:l-roz f af5id 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 aretwo u (u8. b:l7cj u.d,)i- lorqz;0aobfj5ff the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located 7fn77r-1y3 hrzfwgi s at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 fr7 r1nhs7yz7gwi 3f-= 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 charge?

  A point charge of +Qfoevm; d3/ 1fw is placed 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 N acts on the positive charge at the center. What is the magnitude of the force that acts on odmv;ff1/ we3 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 qjs ivwzh2 *4tls(znx,//o p( = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net fo,24/np(hslot vxqs wz j (/iz*rce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at-9 g 4qedg5fxb (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on tfxgqde45 bg9- he 5.0 nC charge?

  Three identical charges of 3.0 mC are plaz4 t5dii lz5cq)88yevxhw 4 v;ced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic fw55d qe vh8z);zitvcix8y l44orce which acts on any one of the charges?

  Consider point charges of +Q asx -bmsz4o*66yr7w(1lkvi enr/r b8and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it m a -bl8rkss1 x4nyz7v r* /bw(6rei6obe 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 +9.0-C charge is at x = 4.0 m. Whered y-+wo4/jku y on the x-axis can a third charge be placed so the net force on it is zerouy+ d4yw-j /ko?

  Charge +2q is placed at the (so. 6 fzwnw.(az yq8jorigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zeo j6z nza(ws..(f wqy8ro?

  A copper penny has a mass rz +rq/q8d1v0 s: nwhjof 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 gravit4yu)x+pklcdbag-(l gp,ki8 s ozf6cu /90 .ify by the attraction of a fixed proton some distan,z0i.c6/lg-p(8l bygcai ud kf xk)s9opu+ f4ce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung 3g.lzx6r)t-1 +xyngqzre +wefrom 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 the 6xz+ e er+z g.ty g31qlxn)rw-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 electricmclbcq((8lb .a tr.xs 4 kv2-r field at ab.a.trs2 m- r(kl c4bc(8 qxlv distance of 1.0 m from the nucleus?

  What are the magnitude and diretmc; 6j fqa0;r7zi lp3ction of the electric field at a distance of 1.50 m from a 50pft jc0a;6mlqrz3i 7;.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude *;km1y:x jgb,pnhv r d2x3;tqof the electric field hn2;q ,;x yjdv1kgp mt:x* br3at the location of the test charge?

  A 5.0-C charge is 10 m from a sb6yx2u5ot9r n3lrr,small test charge. What is the direction of the elet6n5o9 u32syxr l,rb rctric field?

  A 5.0-C charge is 10 m from a small test charge. Wh2ha vyrf +jna dd,3;3cvy2us3at is the magnitude of the force experienced by a 1.0 nC char,2+3av2 h cdjsd ;33ufnryy vage placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by s mdjx9. /*sgsa distance of 4.0 m. What is the electric field ajmsxs *9dg /s.t a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.u y35o :jl6gemj(,mlv0 mC charge is placed a: ol 6vmg5j,ul(yje3 mt the 50 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 y*v2x xq28(-pnyebvyiyn4)f a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zenq ybx-y py(e48vf2n 2 )ivxy*ro?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and xwnuh8w+ 2,bf*utn(6qp-ri v x = 0.20 m. What is the magnitude of the electric field at the point midway(iu wr ,-2nx ptwf+uhvq* 8n6b between them?

  Three 3.0 mC charges are at the three corners of a square of sid(jsnz9z2s iw .e 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at(inz 2j.wsz9s the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at bv3nyh3eehrkz/ h6 a9/( 4s kn-1w9y ,wakt axthe corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, hwn3k1e/ 3,x ka k6-aszbyh ya9wr/h(ntv4 9e1); +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 when it is pla7 l2k4 +vpn;n4zsa :ema 8g1kkgyp;vgced in a uniform electric field. What is the magnitude of this electric fplvpgv4 nk a egg:k8y7;;4 n2 +z1kmasield?

  A particle with a charge of 4.0 mC has ges2katp4 9 hk(xp/,y 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 0.120pi6 kk053y sau g is placed in an electric field of 6000 N/C pointing downward. What05 kk3i 6psyua charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150;fq+ow 4 z, d s6+rd2fsdz:jse g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force 2d4;swjd, qfer+s+ 6of:sz zdof 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 imnswrm,) 1n24blra z 5s the magnitude of the electric fi5rrzm b2,1naw)nl4 ms eld 5.0 cm from the sphere's surface?

  A metal sphere of raxprh8bfm8)2e l7toir c05p co c c/,y+dius 2.0 cm carries a charge of 3.0 mC. What is the electric fieo7b+8o/pccf t xrylrc,)p25ihe8 0cm ld 6.0 cm from the center of the sphere?