State the law of conservation of elecfz.ss *, znadcoi6 l/,tric charge.

  Is it possible for two negative charges to attract eachujyo4d:v5v o9 kzc30p other?

  Is it possible for a positive and a negative charge to attrac72ci fle ng5 *q22jjdlt each other?

  A glass rod is rubbed with a piece of silk. During twy0 fzlowu o); ;a/x.*ent p3ghe process the glass rod acquires a positive char /*pw) azx.gfyoen;uo;t3 0lwge and the silk

  A proton carries a

  The model of the atom g)9db) c1euefshows a

  A neutral atom always hx3b4kdj w)fe) as

  An atom has more electrons 4wpzt0l:ey 1jn5 ps+kthan protons. The atom is

  Materials in which the electrons are d4r7;vk 4cw/h uwm. uy6bi2gh bound very tightly to the nuclei are referre4ikgc y2mbh duhv6 4. /wu7wr;d to as

  Materials in which thee0fjvc2 dh2o 9rkr a2se:,h3k electrons are bound very loosely to the nuclei and can move about freely within the material are referred to asc, f2s 29h3jrhveda2 e kk:or0

  A negatively charged rod is brought near one end of aj))qh (dc22i 76skps vspfq0k n uncharged metal bar. The end of the metal bar farthest from the charged rod will be charg2 k)j 0)q( h26 kspp7qdviscsfed

  Sphere A carries a net positive charge, andnw km5) v)/ofz sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly toucf)wzomkv) 5n /hed with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod cha:dbo9 ce9ag-uo mfmfmevk*f5 n:-9 ( zrge an electroscope positively?

  An originally neutral electroscope is briefly touched with aa nut 2phc( 8y ;b2byrp3(2oxs positively charged glass rodc2; ybn3 bt(8 xarushpoy(p22 . The electroscope

  An originally neutral electroscope is grf/jt 4ufn6f9bzwc( (b91gkj rounded briefly while a positively charged glass rod is held near it. After the gla(f(f krwjfz6gb99t1c /njb4uss rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separateed( d9ej* 5qacxyn7q4 . Then a negative object is brought near the electroscope,qj*(dax9 7 4necyd5qe but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral w x-/e+llrcjbbf33tcn a:s 12metallic 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 roll:e rlw+-2 t/al fcb3 bx31nsjcs 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 hst- i;m2tf -uconstant $k$, which appears in Coulomb's law?

  Two charged objects are s7ticz1g,k.b 3 2xww4+d jbnms mo 5i6meparated by a distance d. The first charge is larger in magnit .m5x6mi bz m4o s312n+dckbj ,ti7wwgude than the second charge.

  Sphere A carries a net charge and sphere B is ne(f tpjnul; u*3 *gc,koutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between them?o3cup*u * nlft,g ;kj(

  Two charged objects attract each other with a certain force. If the c6s -j u(rbar168asgh 6n1g fcwharges on both objec16rg1w 68 ajgs(6 -nsfub carhts are doubled with no change in separation, the force between them

  Two charges are sepa(g. hzwbg k60brated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3(gb. wg6h0kzb , what are the new mutual forces?

  Two charged objects attrac56tyj*b9sci /3lezkg t 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 ck/5s 9bt63zel gy *jiseparation 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 distance of 1.0 m. What happ,34nfgq pwytd4e5ksgr ymv1z eq75 +m-(o7evens to the magnitude of the force on the proton if a second electron is placed next to the fir (m yzevrqg7e5,tv yoq5we7+k ms441gpfn3-d st electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens t yt6fafa/0sy +o the magnitude of the force on the first electron if a second electron is placed n6/tfay+yas0f ext to the proton?

  An electron and a protour9ap 4/ljosjz(5) o pn are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the e)z/joo9ups 5r ( 4lapjlectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the ce(fj)dg0rsvmc1ub/ ) ozzey ) * .d2ptpnter 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/)yz(j gc 1zf ms)dp0d*u. r obvtep)2 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 equilateral triangle.,mq+e: ( aj o3ycs8fzvvd* gr-hv9dz; 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 cvo ;v+g89 yjzd ms(e-:z vha,3* qdrfthe 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 vwf,0h*j rh(3 ep- /9x(x.y onb 6tpekv7zfm lnector?

  At twice the distance from a po w2 9zts.x: ,rv8teff in*i,rzint charge, the strength of the electric field

  Is it possible to have a zero electricdyw;5 n)mz,1p o.r klt field value between a negative and positive charge along t ty.kzornl51pd ;, )mwhe line joining the two charges?

  Is it possible to have a zero electric fi*1ia ue:93 parxw y+mqim 6t6yeld value between two positive charges alo6iwtm 61yum3* :9rxeia ya +pqng the line joining the two charges?

  Electric field lines near psitiverwawo;.g4w l5 point charges

  The electric field sh.me6fi7mue d9 eb- m f-x+ew0hd mt)n7own

  Can electric field lines in6dxva 4ftxs( )tersect in free space?

  A solid block of metal in electrostatic eq :ocxw5lb jo)nn;nm 9 ;k.np9nuilibrium is placed in a uniform electric field. Give a statcmjn; ;w. onn95 b:lnkopx n)9ement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of t (2 1*w)gfc;7ohutl;hwbugvequal diameters are each given the same charge, the electric field (E) (h;vwbug1 )fl;h*ow2 tctgu 7midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a regiosmnpg 0tb 95a i, rwh0*,v:voon where a uniform electric field is directed straight upwa0h0wmvna,,*9 5 b:iv sgpr otord. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an e7w6gi)-.nslr hsk l4ui10 k kjlectric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grounded;y )y .ilpx8.e5dz dwl. As compared to the case without the hollow sphere, the electric fielyl .i y .;px5ldwde)8zd at a point directly above the hollow sphere has

State three properties of conductors in static equil2g a b49xm,rbpibrium.

State Gauss's law.

  The charge carried by one e0; 5i+hfbuots.s ys a :34wundlectron 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. n( 6v frw3m5nx:hstt(00 mC. How many more protons than electrons does this p 3mhtn(6nv5t sx(r:wfiece of plastic have?

  What is the charge on 1 kg o1krz: .p ,om3rkjfb7 of protons?

  An atomic nucleus hasw aspd2pv;+3y :0dam3nnui fp.e tu2: 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 values of 2.bnva)l (s b/+k0 and -4.0 mC, respectively. What is the magnitude of the electric for(kb)ab/+ svl nce between them?

  A 1.0-C charge is 15 m from a second cha akdfqh6e8i45 2 +gh5pk6meqe rge, and the force between them is 1.0 N. em86e5 g+k5qhfph ia4qd26ke What is the magnitude of the second charge?

  Two 1.0-C charges have a fwq31+ mf wo.wgorce between them of 1.0 N. How far apart are they?

  The force between a 17oa;er sqstcsq ).ghu sxx :9m tj)82$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initialg)ww8jq8,,tkp wp17: g oqrl ply 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the elect:8 k )gqjwt q1gp8 wppowr,l7,ric force between them?

  Three identical point charges of 2.0 mC are placed on thw;yme 82ilc)ub.pt 2ye x-axis. The first charge is at the origin, the second to the rigym cue bpi28yt;2w. )lht 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 charge at the origin?

  Three point charges are placed on the x-axis. A chax p-7)v/xeosww9ws1 r rge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cmw vs7x)o-rx9 swp1 ew/, 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 the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mCjqv he91jp9 3ymu ,-am 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 3-j9hajmmv1pe ,u q9y charge?

  A point charge of +Q is placed at the center of aht 8c8ct.9fbe f+g4s v 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 the center charge if ath g8f+vfb4s 8.c9t ce third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.ua3h r qi9/m(j(ze nt:0a3inu30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on tie93z3naum:nr(uh j0iq/ ( athe 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at i 7lng/y)-x mqo vl1-m(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC charge?m v1i mq-l xy-/7)onlg

  Three identical charges of 3.0 mC are placed at the vert e4odv*pw6)id y 4wna4ices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which act)4d dp6ay *wv oein44ws on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. Az 82uh p *ji(yvdun +6zy;,jayt what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on zyah 8uu;6jip2+v*dz y,ynj( 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 onrv) g+ dksbi99 the x-axis can a third charge be is 9rgk9+bvd) placed so the net force on it is zero?

  Charge +2q is placed at3wuk)2 u,2dqmdvle9q81wmca the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is 8 qumkmq2,l3euwc2 d1 vw9d)azero?

  A copper penny has a mass of 3.0 g. A total o 7 wrfz:v 83k.r i)avwa v6z5tkrnxm3-f $4.0 \times 10^{12} \; electrons$ 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 o:u ea* cs9xpxx)q(2i against the force of gravity by the attraction of a fixed proton some :*2ei cx )x x9qs(opaudistance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by t, y8a/ kvtt2eu-vbq3 nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle t vy3q-2kae vu ,8tt/bbetween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is thxof bh3vqfg(*j xu;/ .x*pw.m e magnitude of the electric field at a distance of 1.0 m from the nucleu m g.*xh.o /f;(bf*q wpvxux3js?

  What are the magnitude and direction of zj )pw)dy q oqiy-l6+omz v7y 5z*9ai2the electric field at a distance of 1.50 m from a 50.0-nC charge?ydaz69yop o52i )mw+7qvz-ij)yz *lq

  A 5.0-C charge is 10 m bz yv z(d5.2xl/g o*p 2 /nn.j5rlacawfrom a small test charge. What is the magnitude of the electric field at the location j/ .dnvn5 ( aw* ayxgc/lz5bro.2zpl2of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction h: 1v.),xim j ly147 ng08wiwsfmdgyiof the el,vwi8 mih dm 1jxl .w fgnys):74yig01ectric field?

  A 5.0-C charge is 10 m from a small test charge. What is tagm23ue0izhi3 vpa16aox *qn*h +n; lhe magnitude of the force experienced by a 1.g xl0 i*en3* nu1z6ho h;iv3 +pmaa2qa0 nC charge placed at the location of the test charge?

  Two point charges each have a w ;bj7zziqi ).-vyw3q n2wi2ovalue of 3.0 C and are separated by a distance of 4.0 m. What is the electr n 3iov;2)zb2j-iy i7wzqq.w wic field at 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 -4.0 mC charu0,fqlo;(rqm 3g t)irge is placed at the 50 cm mark. What is the electric field at the 30 cm mark u) (3fmr;rlq0g,toqi ?

  A 5.0-mC charge is placed at the 0 cm ma lceslh8enssc8; a00 1rk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what polec88sa;0hc 01esl nsint on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 /*rjr84.f s g1o iquzsm. What is the magnitude of the electric field at the po4ugr/.o sr* iq81sz jfint midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. x5h*fl*;zwr /q hmg;d l3+fn vThe last corner is occupied by a -3.0 mC charge. Find the w*xl3h/fdml gfr*z;5q;+vhn electric field at the center of the square.

  Consider a square which is 1.0 m on --b)sh6odkunmvl ,u; a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at ( olb udm-,) ;nsk-uv6h1, 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 y )*/vzajn ah hh 7(4ftzsz9ch+qz:6cmC when it is placed in a uniform electric field. What is the magnitude of this electric field +vtz /h cfhq49chhz:y nz*z6a(j7 as)?

  A particle with a charge of 4)livn j,u(4k s.0 mC 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 0.120azh 5a:tk pw+i(7p yz+ g is placed in an electric field of 6000 N/C pointing downward:h(a 5 zikptw7za+y+p . What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carriedhn1szl qj/,7mj5g/ gs 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 diregn1/ 7s5jmq zgjhl/,dction of the electric field?

  A metal sphere of radiuswq0,*a dqzy: y6h:oefrs 4pk9 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the:9 p,6y oafz0ryskw*q 4ehd:q sphere's surface?

  A metal sphere of radius 2.0-, 8vdi20k cxb .fds jiamk50ym1a5tr cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the centera- k xvm ,i05aybr 8fkmi.2s50jdtd c1 of the sphere?