State the law of conservation of electri 4ep +f4sh5srg ty:mw:c charge.

  Is it possible for two negative charges to,r1ddo+aich achr((k.6o s;e attract each other?

  Is it possible for a positive and a negative charge to aq5r.g;m n*wovk: ylgn21 y6wzttract each other?

  A glass rod is rubbed w a/8x7jdn;oqqae qksr, 1tt+z ma2,j (ith a piece of silk. During the process the glass rod acquires a, m d+q(to2j s 7 ,jqenx8k1aqaa/tz;r positive charge and the silk

  A proton carries a

  The model of the atom st3:w ph.fx 7w0-szilv 2+ xrvwhows a

  A neutral atom always hasjv9hpo. :htx3-gcn+ +sx kcq/2: klj j

  An atom has more electrons than protons. T2s) ,c 5m new,b y(o*bto3oakqhe atom is

  Materials in which the el24on8z misz(wo,c am1ectrons are bound very tightly to the nuclei are referredwmo, (n 8zozisca m214 to as

  Materials in which the electrons are bound very lu0xqrfp 81s1c8z.a n d4, lnuaoosely to the nuclei and can move about freely within the material are referred na8.8nq l41 xfuc0,z1a dusrpto as

  A negatively charged 2 dha/l o6sg qjt,u)p)rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged ,ujd) /l2 op6q)sg htarod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thiel*0/g 09v pyrgqbv;ey are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grov*/gg ypq9i0ve ;r0lbunded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positi *xurq1(lid,)v sagor5. vel-vely?

  An originally neutral electroscope is briefly touched with a posi cc0ot :c8zq5btively charged glass rod. The electroscop8c5c0 boc: tqze

  An originally neutral electr-k.y:s pvyz6uoscope is grounded briefly while a positively charged glay:yzups-v . 6kss rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches+kj;lwqu6:m8 ajloz4j ;dwz* a neutral electroscope, and the leaves separate. Then a negative object is brought near the ele 8wwl+q:jlj ;m4;*zu adzjk o6ctroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object wv7:1zkl 7xzr gjz,87de0ge z 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 do01zrzgj,ed7kz78w :zexg lv 7es either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb cbam) xpftl+4t uj3 )8jonstant $k$, which appears in Coulomb's law?

  Two charged objects are sepagbc 9dx d0ghd bi.bwig b13t60( *wbjtz/1k1arated by a distance d. The first charge is larger in magnitude than thehb9w j1zbd i1 b d0i/1.g0bad6w tbg3 t(*xkcg second charge.

  Sphere A carries a net charge and sphere B is neutral. They are plaenqx;s, (-t ppced near each other on an insulated table. Which statement bestp, xeqnp;(- st describes the electrostatic force between them?

  Two charged objects attract each other with a certain fjnd3 7ck1n(r vigo2e( l.pkmn zt( qr:yh7.4iorce. If the charges on both objects are doubled with no change in separation, the force bem.ypnvr.e(kr: nzto 4( q1gl(cd kn23jii7h7 tween them

  Two charges are separated by a distance d and exert mutktjx7h 11 (0mbmb d,kqual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutu j7 b,hx(t q1bkk01mmdal forces?

  Two charged objects attract each other with a force F. What haplsebq1qj .y0po wa:. w3e4 ,eepens 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 oraelw ebpjsq.,413y oeq. w0 :eiginal value? The force is now equal to

  An electron and a proton are se0m;pvysy dg-gy cn 5k)/8nmi6parated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed nyvdi86p m-g gs k5n;cmy )0/ynext to the first electron?

  An electron and a proton are separated by a distance of 1.0 p:ej ,5)bj xigm. What happens to the magnitude of the force on the first electron if a second electron is placed next to the protx 5)egijp b,j:on?

  An electron and a proton are separated by a distance of 1.0 m. What happensdmtd9at173 rimf*s1 cvcm7j4 to 1vt3af7 d 1rs md*j mmitc9c47the size of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poindgj( :2qs gat- duo)g8t 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 u2 og tsd )d8(-aggq:jthe 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 isnld hk3*yg*31rkzc 3 i placed at the centroid of an equilateral triangle. When a second charge of +Q is placed z *3*l ng31kr dhcyi3kat 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 to a third charge of +Q placed at one of the other vertices?

  Which of the following is n4i5+4xaxc7 y4jelhit;o9k :n 2iuxh*e3i jc got a vector?

  At twice the distance from a point chargeow/a8* b5y:oa1 hbe wi, the strength of the electric field

  Is it possible to have a zero electric field value between a f;c s7sgo2 b1 ao. k..-qgn2m2is lgkinegative and positive charge along the logs b-k. lo22ig. gnics;7a1 m k.sqf2ine joining the two charges?

  Is it possible to have a zero electric field valu+hu)tcx5qb6 ,rfcp57eipxs ) e between two positive charges along the line joininc7,5rh) ufq 6ept sp)+ icbxx5g the two charges?

  Electric field lines near psitif j3 d+vhzjm- z6sya88ve point charges

  The electric field shown - uoydor29 dc9 h- gfldm0cq-0i25r yt

  Can electric field lines intersect in )dzmmu5463 yxlr9lae free space?

  A solid block of metal in electrostatic equilibg3;q:n t(tcak rium is placed in a uniform electric field. Give a statement concer t(gta;:kcqn 3ning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal x w : 9lgtngf8)9qlst8diameters are each given the same charge, the electric field (E) midway between t9nl)wtsgq:x8t8 l fg9he center and the surface is

  A cubic block of aluminum rests onnd f-9*b wh/lni.co +r 55ouya a wooden table in a region where a uniform electric field is directed straight upward. What can5h*/5+ridufawb9 n.ln-coo y be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an sdh;a8d euu 0ukm)*:w 1 z)n2donvn9relectric charge

  A positive point charggf/2d5cmfem4 rz09vn27 b0yzg gzb i;e is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow spher0me 2f9gbrb 2 zzyz0/vfdcm7 n;gg54 ie, the electric field at a point directly above the hollow sphere has

State three properties of conductorsj5 7 fq )gk*vq1efzaor+ajkl.e 8 z;+.kvzp6j in static equilibrium.

State Gauss's law.

  The charge carried by one electronmytel 28)4fjm 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 neluyarck (skui)y.hvmj9. 79 0t charge of +2.00 mC. How many more protons than electrons does this piece of plastic have?(.au.rj 90kyl yimu 7cvs9 hk)

  What is the charge on 1 uzwc7cm66q +l5)aif h kg of protons?

  An atomic nucleus has a charget b4rs(x/mv s; 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, havsce 8ru7 qn24te charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force e87 rc24ntuqsbetween them?

  A 1.0-C charge is 15 m from a ( 9uzmz0 9:wml3pqhjjsecond charge, and the force between them is 1.0 N. What is the magnitu(z0ql9 j j3 z:pum9whmde of the second charge?

  Two 1.0-C charges have a force between themhqv /5yf)j dj6a(;j82x vs fyku(q s*j of 1.0 N. How far apart are they?

  The force between a q)yewjwd *358 (oc5kau )bxed$30 \; mC$ 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-N force. If sz2klnnr:f6 ,5kra3n1 r i p;rthey are moved to a new separnr n kkazir3sfr62 prn :;15,lation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on ty1xdei sd ,9wcl2 yzf- /d9m*qhe 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 fo e y9c1qm/yl2d-s9d,wiz f *dxrce which acts on the charge at the origin?

  Three point charges are placed on the-t o50oq 31gl,qbf 6rqh)an cb 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 ar hb5 aqrc01 6oo- 3,fbtgq)nqle the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following posit i :kkjw+z *o qgr2;wj5tjmxt9(- gq-mcn f,2aions: 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,g9 n w2(5:zo mi;tt +gkw2f*cmxjjrjqaq--k charge?

  A point charge of +Q is placed at the center of a squar x9y(kd*th mw+z+ sdw,e, 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 charg szt*kymd+,(dhx9+ w we of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1( 8x b-6p2ibcxxoa/wz .0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the w x-iax(8x2 ob/c6bz pmagnitude 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, 0.8vqxf- 6gb .ij10 m); Q3 = 5.0 nC is at (0, 0). What is the di vjb-ixq 6.fg8rection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placedys yk:hp ziff.*-6b;d at the vertices of an equilateral triangle which measures 30 cm od6py; z k -.bhysi:f*fn 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 sepdihm ;r,k(b,q ai,r u4.i:xksarated by 3.0 m. At what point, on a line between the two charges, would , k:s,.m; iqir id4bk,u(harxit 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 +9.0-C charge is at x = l9zfbjv vg3qgm2i1 jbj9 e ,,h4(q.zo4.0 m. Where on tjv,(bvleqh ij go . bmz24f 9931gj,zqhe x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the orig4wi o-chkhxaqoj6t+v r1c3/, h,fc)win and charge -q is placed at x = 2a. Where can a third 3qc/ohh,otij k w vx4w hc-+1)fa,rc6positive charge +q be placed so that the force on it is zero?

  A copper penny has a6 +dvqmfmv5 hv. np3x9 mass of 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 gravity by thd7g)kbkj0 a -je attraction of a fixed proton some distance above it. How far abo-g dk)7k0ajjbve the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point 9) wri4iueag8 by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the a eiau4 8)ri9gwngle 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 eleo7pql,h a1cctr0c (q0yr1 r0 tt 3ni/pctric fieyr1q(7c po/r,0ar lttqn3c0 i th10cpld at a distance of 1.0 m from the nucleus?

  What are the magnitude and dipb. niaa p35n*rection of the electric field at a distance of 1.50 m from a 50.0-n5p* ai3nbapn .C charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magw28dq4cv8i er nitude of the electric fir28cdve4 i wq8eld at the location of the test charge?

  A 5.0-C charge is 10 m from a sbc n4:h(0x. wfzb7anmmall test charge. What is the direction of the electric fxzfb acn:mhw.b7n 4 (0ield?

  A 5.0-C charge is 10 m from a small test charx /ef k3vvx+,,s.eoppge. What is the magnitude of the force experienced by a 1.0 nC ch. spxx /oeek+,3fv,p varge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a disd y8/+v 4yu*y1sa pipltance of 4.0 m. What is the electric field at a point midwya1vi4p8y* +p yu l/dsay between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a dkps +ke8c,m--4.0 mC charge p8s-c d+k kme,is placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at theug ffjr l8r66he338h p 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two crfe8h6f3 j u6rh 83glpharges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x /m96 z5klqgxclc(jk 3:w zui4= 0 and x = 0.20 m. What is the magnitude of the electric field at the point midw4/c: k 3qzklguz6 5wjxcl9i( may between them?

  Three 3.0 mC charges are at the three corners of a s:xf kmk hm+ 4kl)rmg/4quare of side 0.50 m. The last corner is occupmhlkmf)4: xr4 k+m/gkied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 14x(dsl w ,;hatl- nori40pb:k.0 m on a side. 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 field at the square's centex(;t rlski,0 4nabp4 wod- h:lr?

  A force of 10 N acts on a charge of 5.0 mC .a.- ondao l7rwhen it is placed in a uniform electric field. What is thon -o.rad a7.le magnitude of this electric field?

  A particle with a charge of 4.0 mC has h d oa8 /rwq* -prl9)o )o*8gpu45dcjqco9mpua 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 placek/t( y503biaka p s:qjd in an electric field of 6000 N/C pointing s(jyibkt :p3qa0a/5k downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 3dz11r. 5wg;sdpr mxig carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the5 irgxrd1.1m3dswz;p electric field?

  A metal sphere of radius 1077*nd 0okccdnp k)o 8v cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphe7kod8 c cn 7vko)*dnp0re's surface?

  A metal sphere of radius 2.0 cm carries a charge h*yt sp1)g ui xj0r:mmwq:*w9 of 3.0 mC. What is the electric field 6.0 cm from the center of the sphp0gi rm9)mj*q:s:y*xt w uh1 were?