State the law of conserva1l n,*ptod yl,(2f iw37kdbqg tion of electric charge.

  Is it possible for two negative czhtg:vh-vud fb :kl6. 3l r9p(harges to attract each other?

  Is it possible for a positive and a neqh(dc.pe d4h *qd- o+tgative charge to attract each other?

  A glass rod is rubbed with a piece of silk. Dy 1t eep0vm nd)g8gx0. -gjdi(w 3xhl2uring the process the glass rod acquires tgvngjw l)1 -ehy0dpimd0ex (xg 832. a positive charge and the silk

  A proton carries a

  The model of the atom shows) z3oe.u zhwss1:na8z a

  A neutral atom always haszd tab54vch+a 3 1.vdb

  An atom has more electrons than protonz 6v43x q)ptfmop8l9 ry+b+b s. imyk+s. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referr)vk-1zhrwoeznrxl/5n2s 42 qdwi :*jedxor5ze2nw sdrz1kh- lw2 i:v4j/) n*q to as

  Materials in which the electrons are bound very loosely ffz:9re 2w-- k+slxjuto the nuclei and can move about freely within the material are rkwf -ze 9slf +-2xru:jeferred to as

  A negatively charged rod is brought near one end of an uncharged metalsm8r+)eipd /al 74cy:dof .rl bar. The end of the metal bar farthest from the charged rod will be caopr df m/ ll4rs8 ye+:7.i)dcharged

  Sphere A carries a net positive charge, and sphere B is nxs vziz* g*, 2ega;v*geutral. They are placed near each other on an insulated table. Sphere B iags;,xgi ez vvg* z**2s briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an 4 npm4ech6 g1jelectroscope positively?

  An originally neutral electroscope is briefly touched with a positiv/bm tp v b.zxlbn).gt/r:18foely charged glass rod. The e bz8 r1 b vmt/):lpn.ogfbx/t.lectroscope

  An originally neutral ele36gj:mrr/ *o,ez p gs hgw6ca 3qw-+itctroscope is grounded briefly while a positively charged glasst+qj:rh3/wi, e mgp zgsrgo 66-a*c3 w rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, ah8;qharg*+b+z duj(z nd the leaves separate. Then a negative object is brought near the elr;azjhgh8+zb uq *(d+ectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is pla56qj:.1bq j gr6 etr*9kia bsxced on an insulated table. A neutral metallic ball roll56kq s rxj*91g6 i:raqje .tbbs 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 does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of thq1reqoh)fp:,wjwddr1 29v5x r2dq q9e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separatedhup(czu ,w3v9a 5,jqs;mkjx/ by a distance d. The first charge is larger in magnit;mp5wk ( u h j9aj,s3u/qczvx,ude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Thvuf(d.q56 q p ny:y8lyey are placed near each other on an insulated table. Which statement best describes the electrostatic force between thpyl.q8q vy5y 6nd :uf(em?

  Two charged objects attract each other with a cert sfv1wwtcy4+;ain force. If the charges on both objects are doubled with no change in separation,1cwt+sfv w4 y; the force between them

  Two charges are separated by a distance d and exert mutuayqwg(5j 2vl;mn g1l(n n sn6jc(09vgql attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutualg;nw( jvy2n ml(v1snqn0 6(gqc9jg 5 l forces?

  Two charged objects attract each other with a force F. W;;dt (2 qhl5l lrljq+phat 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-fl qtlr+ (h5l;l; pdj2qourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hauc0l dar61 mlm5:1jjor/m xgbo:oe /. ppens to the magnitude of the force on the proton if a second elect15:c 0xo/o jl1arbjmmm e:l u/6dg.o rron is placed next to the first electron?

  An electron and a proton are separated by a distance9 b.d cw7.fdkw of 1.0 m. What happens to the magnitude of the force on c .bdw. 7wkfd9the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated bu)txpuh j swtnc0f.27 1gma)ud+dg* 0y a distance of 1.0 m. What happens to the size of the force on the protocwtum d)a h*t2s7)fn.01j d0p+uu gxg n 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. Wher1kgc t0qd5b8+(go/unip gek/1 yrw7 n a second point charge of -Qu i8g0rwgkp1b n7to(r gkdq cy5/+/ e1 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 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 equila76o.d nz:ghnhteral 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 to a third charge of +Q placed at h7dh: nno6.g zone of the other vertices?

  Which of the followiw7; 0tycys1nk jlgc fdh2kth+/d* /q;ng is not a vector?

  At twice the distance from a point charge, the strength of tl xg/ (fmh)rsb+1y.:.eb4tz z/ irktkhe electric field

  Is it possible to have a zero electric field value between a negativeg ;7)-x:s 7pkjhsqr gj and positive charge along the lig -jh)77k:s;xgs qjprne joining the two charges?

  Is it possible to have a zerop3 47yn wiez6k electric field value between two positive charges along the line joining the two charges?k6z ne ywip473

  Electric field lines nq+ (eo .,nr 1zoqt5xtg9mq0lkhu, 6 ogear psitive point charges

  The electric field s :v8zoxj*u 8s+w9oxj chown

  Can electric field lines intersect in free spaefhi,u 5tfceiw *hb l e5k/;71ce?

  A solid block of metal in electrostatic equilibrium is placed in a unl3ih-c*s zhjp .3yyi +iform electric field.czlhsy i.3*yj hip+3- Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a holl x/nk *9ezelh6ow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between thhn6z/*le 9ekxe center and the surface is

  A cubic block of aluminum rests on a woo,j l)va8)mv1z .6q/j )fudkgez-a du7gaf s:oden table in a region where a uniform electric field is directed straight upward. What can be said concernk j,zvg.1as- /gd )7a m):)zdqf6ulav ufoj8eing the charge on the block's top surface?

  If a conductor is in electrostatiim ,5 n1 3p)3iwb5e+cukcmf pvc equilibrium near an electric charge

  A positive point charge is as hgr foih.xe)3/3s6ga 4hd3enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electricf/ a3osahgx hg hs.33e6d)ri 4 field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.e kaq3 z8hgi(ghxj6(2

State Gauss's law.

  The charge carried by 2+gl* ej4jh dakx vj) v57e9zjone electron 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 net charge of +2.00 mC. How many more* dynq j9no+krr) pd/* protons than electro)n+ ro nq/9jkdy**rp dns does this piece of plastic have?

  What is the charge on 1 kg onvu40g8;t wa uf protons?

  An atomic nucleus has a charge cer;,0t k wzk0of $+40e$. 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 valuep mthb tpj 5**b3x ba2v5;/u2ubx9h qis of 2.0 and -4.0 mC, respectively. What is the magnitude of the elechq5b 92u*i bbpx5 bv3ttu;*a pjmxh2/tric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them iznwy8r8 s0pjl6 b2zp5s 1.0 N. What is the magnitude of y 2 s wzjz60rb5pl8p8nthe second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart 2v)wq-/f miyx are they?

  The force between a okdpe)ayz p,n(,3 55fin2s d i$30 \; mC$ 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 fo8 ukfa/dxc- j)rce. If they are moved to a) jducx/ak 8f- new separation 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 first l5kp0 m**aoc l wivhz(d;2wfnx+ gg+ ;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 dirl2 n*mx (+kozg5wf;wplcg0*vi a +;hdection of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on9 iig5ro. k.jdg dj99dnlqa 3( 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 on the charge at( agdng9ok 9dq3j i59jrdl i.. the origin?

  Three point charges are located at the fo jj( g7e5c;ub+5yznvsllowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = 5zgvc+ys eb;( 5uj n7j-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 of ux6ho3fq2sh 8-am( awj, wk;t ihbgqp, 1g4l 9a square, and a second point charge wopgw ;,9 ghm3l6 ti,fqaah( hsjx2-8u 41kbqof -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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 u),p5 ihro4trm); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC chargeiru4 t p)hor5,?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at i;6 ,j yrrym; *o)qdr;le g3xh1mgcz, (0, 0). What is the direction of the net force on th,j1q y d;3grm,l6z) omi*;x ry ;rehgce 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices kmt(a7ah:ha enb/ -e o05qp:x+fk q6bof an equilateral triangle which measures 30 cm on a side. What is tqx6h5m ah/ q+7bfoaae 0-nkktpb::(e he magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by owtog:d+9pd yn+)l*fff d3p * 3.0 m. At what point, on a line b )fp3t*onfd9g olfp dw +:*+dyetween 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 is at x = 4.0 m. t:xensj* wjgg. e5 r)o2d+mx+ Where on the x-axis can a third charge be placed so the net force on it is z sdg*2x+: exrtjemo+5 .)jnwgero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. W/a02hyf 35bxixjyd7c2* wuws here can a third positive charge +q be placed so that the force on it is zerox wu3 cbxy5d2ahsw 2/f*7jy0i?

  A copper penny has a mass of 3.0cs):in iax e0 n wf:9if68t;wd 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 ujqyb-1 (uoi2uvxmi k. 16v8 xtp against the force of gravity by the attraction of a fixed proton some distance above it. How far aboko- (t1j 86qxbiivu m. 1uy2vxve the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductik 2i rwh) 3jwsy+,sjpb 5t+;bcng threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threasrw2,;hb+ic+ wb kp 3sjt)y5jds is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has ag p3 xd6yhsv(0+8mres f8e o,j charge of +40e. What is the magnitude of the electric field at a distanc8shsy0,pvm orj6f e8+ eg3d (xe of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distac* d4b e0*p/njhm .n,lgzfbm6nce of 1.50 m from a 50.0-nC d*6ml/mecgfn h0nb, bp.*j z4 charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudefsomz;*u cge4 2 tu(f4 of the electric field at the location of the test chargsu4f mocu eg;z2*ft(4 e?

  A 5.0-C charge is 10 m from 0p .sv)o,o tbo-r9g.l7iyomc;w m3w va small test charge. What is the direction of the electric fi9oo g s 3i.-owolm)7rw.ycbm ,tvv;p0 eld?

  A 5.0-C charge is 10 m from a smamw3lzf 4 vr7i1ll test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thm7ziv3fr 1 4lwe test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance of 7 1zn5ihj9d7p9c 1 rpgpw:b5cfxjk u-4.0 m. What is the electric fiel57-g9czp 5njup f7i:r1 1 xpbdkcw9hjd at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meteo;x)j,y5euac s ub m**r stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fi u5)cx,*;*y abosm uejeld 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 charg x9yqbo1 g:g m.dj za3vdvr3s; y0p:l oaar:(:e is pl .90vvddrzoar:p yxq:b:3 ;yjma ga:s3 1 ogl(aced at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.imxp. 9g biu;7,*necr0 mC are placed at x = 0 and x = 0.20 m. What i9bnm7c e.*uiirgp ;,xs the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squace2cl:1 p.nv cre of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the centerln12 v cc:ep.c of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at th9rcm( obzitl:vn / 4oy+ b+eu2e corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at c9 : 2nrbu+bmel+(vz ot i/y4o(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 center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in ad bhpz(o6 1/hg7agf xauavnfc01 ./c( uniform electric field. What zpo/n(c7a0dg (1h u fvfa/gh1.b6c xais the magnitude of this electric field?

  A particle with a charge of 4.0 thpx 329 *.vlc1 i;yy7ea clzgmC 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 0.120 g is placed in an eleuzx l4 9t56aguctric field of 6000 N/C pointing downwa9z4u tgx5u 6lard. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -l7ugga*i* ta )2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force ofaitu) ag*l7 *g 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. Wha-nef8wb+ql qn x2ww+ ;t is the magnitude of the +bqwennql wf;w2 +-x8 electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chajr7ayxv95(ei p7vjmtd -r a9,rge of 3.0 mC. What is the electri- j(7yvj9xptred97r , m v5aaic field 6.0 cm from the center of the sphere?