State the law of conserva 5te 8xljg*1jction of electric charge.

  Is it possible for two negative charges to attz-h6b 6f;zz yyract each other?

  Is it possible for a positive and a negative charge to attract each other ek;o2*+:xqy cbp1akf?

  A glass rod is rubbed with a piece of silkv5w 4k/1ppiqt . During the process the glass rod acquires a positive charge and th/p5i1 qt4pwv ke silk

  A proton carries a

  The model of the atom shows aj qkuocy8g8(,q)5cd p

  A neutral atom always hap 6lygvkbh 90u5t)6sn s

  An atom has more electrons thaz;h -si 6a rud*p0wn4nn protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are reft e ,e,mdwmhxc9-8jn+erred tom,en h mt-wjecx+8,9 d as

  Materials in which the electrons are boxjick;bnfn+ b-b 38v+und very loosely to the nuclei and can move about freely within the material are referred to aj- 3x+; vfi nbb+kb8cns

  A negatively charged rod is brought near one end of an uncharged w2irkx21p(1 ,r ;xyl auup9cd metal bar. The end of the metal bar fxdw;p a u(2r xkil12pcr1 u,y9arthest from the charged rod will be charged

  Sphere A carries a net positive charge, adcpc r0*lv)(uyp o8jh6dlo*/ nd sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly toh) o*cduo/pv(8p r yl jcd6*0luched with a wire that is grounded. Which statement is correct?

  How can a negatively cha)uc.(x ky kiqw 25cwwd93z* aqrged rod charge an electroscope positively?

  An originally neutral electrosc.j xo gg3s,m;m,)f3xjhls l 5ay0xb 9nope is briefly touched with a positively charged glass rod. The electroscopexlggbx3hx9fs,m 0so);5ya,l 3jn jm .

  An originally neutral electroscope m:tz zp3pcpl )12/u/e stb/pgis grounded briefly while a positively charged glass rod is heldp1pzbe2 tp/mzg: cuts3/l) p/ near it. After the glass rod is removed, the electroscope

  A positive object touches a m6 li z4+p0n( jyj*vt0xwx9gz neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but djgnpy*x z(xv0jz04mil69 wt+oes not touch it. What happens to the leaves?

  A large negatively ch,io j+/hr1 b1a;a + zgyrg:nqqarged 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 pah+r /+gybago1iq1ar nz j,;q:th 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 y7v9p8s 3lsoi oqhij a7) /+hvthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The 8onh 8l:bdu sf8 :tm)qfirst charge is larger in magnitude than the second charge8bqnd ut: 8fls h)8mo:.

  Sphere A carries a net charge d2/xh o(a,tnr and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describerd2(,xat h/nos the electrostatic force between them?

  Two charged objects attract each other with a certain fo 0obwwvk q15joc+k3xt 9ji9w j .caq0(rce. If the charges on both objects are doubled with no change in separation, the force betwee9x k(. w 5cqtkwva 1qjbwcjo00oj9i3+n them

  Two charges are separated by a distance d and exert mutual attractive f-ndw48;x -a4 qm 73gd tq-srv2wd qkuborces of F o;-rad d-bq4 2v7-tqgk3 wqxu8sm4w ndn each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eamwfl;a-x;-) (t16 lfvpiby tsch 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 equ )6 i--w ;laptbx mtf;(fys1vlal to

  An electron and a proton are separated by a distance of 1.0 m. What hap w1h k )v5h82tn+/d.etuqwzjtpens to the magnitude of the force on the proton if a secon)e. +w 5nt8 jt2htqh/u1kvzw dd electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What hrdcijvu9c:u+6y-*a +z.a nuqappens to the magnitude of the force on the first electron if a second electron is placed next to the protoni :uqva6+.a*9-znj yurucd+ c?

  An electron and a proton are :we2tvir9o :,yim gd* separated by a distance of 1.0 m. What happens to the size od,*r 2ev9ym:wii: tgof the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed ah*p19 gxdetq( t 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 placed at the other three corners of the squard 9 *qx(1gethpe. 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 :1 z+:go1q*gq/kz nmut)luk)k0b jgjof an equilateral triangle. When a second charge of +Q is placed at one of theu)/: lg ) +u:kgj* zkqm1ngjk10boqt z 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 not a vector: g ,4anhl3s;: dq*f8awmgu rr?

  At twice the distance from a.-yrm/hdtz 73tsx h9 r 1yx8hp point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negativz np 1st8 qbp--c91.oer cn-rx 8ybv+te and positive charger8y.+epct1 - 1p-b9xsrq- zboncvtn 8 along the line joining the two charges?

  Is it possible to have a zero electric field ac+ +2msc0+9tg 3zn 7ursaxfyvalue between two positive charges along the line joining the two chaxsga+yrm 9n3f+z0 ct7u c2 +asrges?

  Electric field lines nelma rgqs2: w)ig :ub0*pdn,5n ar psitive point charges

  The electric field shown vne /w /egk7 jf6,jbs:sqb:-g

  Can electric field lq4fo8flmil c(ia ) tbi6/- n6rines intersect in free space?

  A solid block of metal in electrostatic equilibrium is placr+uev3/wdqhq2 )pp9x ed in a uniform electric field. Give a statement concerning the electric fiel)qr phup 92d/v3ex+qwd in the block's interior.

  If a solid metal sphere and a hollow meta21b( zw3p xm n(ln2y9rjwt1 yjl sphere of equal diameters are each given the same charge, the electric field (E) midway between the cen2(pbwjx91t2yyw 1m3 (n n jrlzter and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniicrpr+d v4;x cc 7f/s,form electric field is directed straight upward. What can be i+fs4p rx,cccvr/ d;7said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chargfo l) jyethl 1:i8ft:d(t3e2 ie

  A positive point charge is enclosed in a hollow metallicof4rp) l esua.v /5*tx sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a ux 5pvoretl)a*/f4.s point directly above the hollow sphere has

State three properties of v4rxt jz ( j9kepr.j;2 kgx9,wconductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is p mzu c(d66i:p$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net cha p1 vrq813u - uaiwas y7uu9x-sz2ylb7 t/uy6orge of +2.00 mC. How many more protons than electrons does this piece of plaso ua1v u-lr9w- tqzu2u suyxa p6yi871y/37bstic have?

  What is the charge on 1 zauf0wtl;x46q-*ocy q(sur *kg of protons?

  An atomic nucleus hasa7, ;wi2lsr nu a 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, have charge valuwzr0gy3b clv3 ;slrct4b +.:mes of 2.0 and -4.0 mC, respec yvw0 4lz3sctmbbr+g:3;rl . ctively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m ffa:v,88rl 0nb m.sayf rom a second charge, and the force between them is 1.0 N. Whb: vn.m8a ,8lryf0safat is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N.q+ ub8oc5 d 1bm,ic(zf How far apart are they?

  The force between a k/afp rft a/m6+rp:p,$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apyx4d6yv:1 irk/ovt f, )lh:d yart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between ltvyfry kh 1yx 6::d i,/o)4vdthem?

  Three identical point ch2kj .f(n/ cmreyo .sn6arges 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 magn.meo(jnsnc2 ry.f /6kitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed zhvn- u i7k2-don 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 magnitude and direction of the electrostatic force which acts onnh-ik- d 7vu2z the charge at the origin?

  Three point charges aef10i)lh ;:qu :mmnoere located 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 0mi)hulqn e 1m ;o:fe:= -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center .k, c*cgb93jgko ed (gof a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic .dk9g(,b cj *cgegok 3force 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 corner?

  Q1 = 6.0 nC is at (0. --k-hp ax rdgz w9oj; fls7 ,qo(5x7c2pji0ue30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude -fkjui2 -x 7z-;79hd (pgp5a, q ooc0sre xwjlof 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 xznr pcf.:93tm2p ddgot ,2r/= 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC charpzpc2 fr: 3 /xrton2d.t,m9gdge?

  Three identical charges of 329 *w04rop;hyz dbgb r.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 ofywhb 4d r*9oz brg02;p the charges?

  Consider point charges of +Q and +4Q, which are separated:vi sf6/rz6 x)hdgd((oafb -o by 3.0 m. At what point, on a line beo)dgxoa if:6vr/6(shzf( db -tween the two charges, would it 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 vvm br4s4kqg,j +90 jg9ix 0vdis at x = 4.0 m. Where on the x-axis can a 9bqxk94+ i 0g40rj,vvvsj dgmthird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where(.wp/8rmlqeh7+b sy b can a third positive charge +qm 7wp (hqselb/+yb8. r be placed so that the force on it is zero?

  A copper penny has a m/o 4:4dadlbng ass 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 the attraction of a fixed o-vw;z ryc i97(ye2ilz0n8f1w xv h*d proton some distance above it. How far*icnifywzyxldr;2e 9v87 (1 wo-0v hz above the electron is the proton?

  Two 0.20-g metal sphers3fa f+y t 7*)frcqt7ses are hung from a common point by nonconducting threads which are 30 cm long. Both are gta37crss) *f qyt f+f7iven 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 +40eommmfv+f p ;dk86qrz 8+gjj51 . What is the magnitude of the electric field at a distance of 1.0 m from the nucleus88okg 61mz ;rdpm +mjvf5q f+j?

  What are the magnitude and directiond0k8d14 ,wos nwcl7zn of the electric field at a distance of 1.50 m from a 50.0-nC n4dk ww1sno0z,8 d7c lcharge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the/nr +ykli ovwlsyx9a,/h;71zv0n vo8 electric field at the location of the tlo nnrv/oyi1xy;kw9/s8h,07 val + zv est charge?

  A 5.0-C charge is 10 m from,hxunma ,3kmmb b/:8p a small test charge. What is the direction of the electric f8m,/abhp:bx3um mk ,n ield?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the bhq,4:lv5kgaqvc : yt80z2r lforce experienced by a 1.0 nC chrcht vzl4alqbg :,kvqy250:8 arge placed at the location of the test charge?

  Two point charges each have arq:2zf0m.ya uw ,z:eg+lm4cdl s6ib( value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a flyaiq2+:r z,m mlsgceub .:z 06d 4w(point midway between the two charges?

  A 5.0-mC charge is placed a(k hr x,,+*y*p f-*py ol0uluyblvs/ pt the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark.p*l v0*so,/prb-ulp fhkyxy*(,+uyl 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 -4.0 mC charg0g t-ktema 9)ve is placed at the 50 cm mark. At what point on a line te0 avg-mk )9tjoining the two charges is the electric field zero?

  Two point charges of +3.0 mC and ngsxz4 p lzr9k95s-cd5)iwb5 -coku/ -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field )wsl9iuzno-gc/ x k5cr9d b s5z5k-4p at the point midway between them?

  Three 3.0 mC charges are ato7d 55r-bwfu l the three corners of a square of side 0.50 m. The last corner is occupilw5 ur5-fbo7 ded by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges areetrcv zz.f6b s .lj/+6 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 (lfr.et. j6v+sb/c 6z z1, 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 placed in a uniform elect9vc8lw viwg 293rwp9kv6 l9k jric field. What is the magn gv62rw3 i9k9v l8vkw9 l9wcpjitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of eyg,d1agpvvn7.5m3:( cohp pbu ixuu1u h31-$5.0 \times 10^{-3} \; kg$. 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 wf 2 .w,:- fr*25nqiig jkrs7pcexnn7electric field of 6000 N/C pointing downward. What charge fr2p2ki.7 -5*rxsq icn :ef,j7w wgnnmust be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2 4e vh ptw .c-r hudlff06g6tc9w45-sd.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravitrchtcw6fds6wedh t0 49-.-pfu45 gl vy. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charga9 -rlq* ye b,p/4prsanb6m5ge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the spherp45e* /nr6py9ab -qbrm gsla,e's surface?

  A metal sphere of radius 2.0 cm carries a charge ofeneq.1t 6b+wi5pk4u9n)d4 whcqc /gf 3.0 mC. What is the electric field k9w )enc4+ c 4 f56u1qw qbpdtngi/.eh6.0 cm from the center of the sphere?