State the law of conservation of electric ck i0z) fgcad;me 7gi-0harge.

  Is it possible for tw9ih)ev vq7 4i-5azyz uo negative charges to attract each other?

  Is it possible for a positive a:1 p8 paus+ousnd a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the 2ve4l3z o;+l,zkqlpz process the glass rod acquirelvke32zzq,4l lpz;o+s a positive charge and the silk

  A proton carries a

  The model of the atom shoi4:jfrk +d6w f;br4 nnws a

  A neutral atom always ha p)imzmg+h gp zvub7.mk9;(k-s

  An atom has more electfbo5)8f ah.d wrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refli-ub3f 5aj (terred to at( lfiaj- 3ub5s

  Materials in which the electrons are bound very loosely bq) t+x,95 1i.u(fjvtoapv nnto the nuclei and can move about freely within the material are referred to a 9qitonj5,b)+avu nv.( tp1fx s

  A negatively charged a3sejx6t 4s2krod is brought near one end of an uncharged metal bar. The end of the metal b4j 2esk6sx3ta ar farthest from the charged rod will be charged

  Sphere A carries a net positive charghx a8k9j60zwg ( .mpise, and sphere B is neutral. They are placed near each other on an 98gmh0.x sj6awkz ( ipinsulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope posbxl4 0abf0t;i 7o; ylz0gkgm0 itively?

  An originally neutral electroscope is briefly touched with a posiobs.:v 5nt: jytively charged glass rod. The e.sybjn ov: 5t:lectroscope

  An originally neutral electroscope is grounded briefly while a posi3-9yhmz malf d1+ ,hedtively charged g-yz1m9+d,dh h3f lmealass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepw5uz2) cmx0 eyarate. Then a negative object is brought near the electroscope, weyx cm0u)52z but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tv2o h/rg3.wjc)s rsveo e7uo6t 7l;m4able. A neutral metallic ball rolls straight towaresuoh7rtmso v2owcvr37jl)/ e 4g;. 6d 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 tes 2qjyob/* z3uly9 p-he Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separatev :i-bu w m. nhn, yzuwyh51*s4o/k3ied by a distance d. The first charge is larger in magnitude than the secy:*.b-,hnh13 iuoks45zew vwmny i/u ond charge.

  Sphere A carries a net charge and snu.0h m1kzc6 aphere B is neutral. They are placed near each other on an 01c6au.mz nkh insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each othmr4jo9z 665ngr 7 pgqter with a certain force. If the charges on both objects az6g9pm rr4oq5gn 6 7jtre doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forcesay:nsl9yq9va 1wlqa1(9t(tu of F on each other. If the charges are separated by a distance of d/3, what are the ( uwstvl (a l19aqyqy9at9:n1new mutual forces?

  Two charged objects attract each other wf/ut.zc d2ut* ith 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 reducc fu t/z.2du*ted 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 happens tfv9 irbi kij+,x)n,k 5o the magnitude of the force on the proton if a second electron is placr9b nx5kkj,+i,v )if ied next to the first electron?

  An electron and a proton are separated by a distafzz a:d z)e;74 +upb1e0zbvhxnce of 1.0 m. What happens to thefda:1x;epbhe4z)z u+zvz 7 0 b magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton ag. )3: wif-:ulpr.scu izs+u zre separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to t -clgsrwi3f: .+pu)szz.:uu ihe proton?

  A point charge of +Q is placedd.a w y,pkxd;78n qv,c at 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 threeq.;cd 8kp7naxw,yd v , 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 placewtw7 xdtb-)bhw:86k gd at the centroid of an equilateral 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 one of bwkdtw)xbh g8 w-t76:the other vertices?

  Which of the following is not a veceq:f z9zy:a3 n7oabhk b) /ux,tor?

  At twice the distance fromhrm,)jv plhf ) qp*o-; a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and posi-i+ )k (j:gjf1rigq xjtive charge along the line qki+1gfjg - ij(:x jr)joining the two charges?

  Is it possible to have a zero el30st ;)plik*a3o /9 nwjrjkidectric field value between two positive charges along the linpoi jk3ks0i/t)j*ln; ar 3w9de joining the two charges?

  Electric field lines near psiti-u : h(rlibuv* zyl;ykw652c5j3 wr7qh:st hive point charges

  The electric field showlg38d 941ekwcqq fya9 n

  Can electric field lines innkdphe r,8-arfwvwn;ya 0w t7;y*29 dtersect in free space?

  A solid block of metal in electrostatic equilibrium is plx)oc)rg fr,45vgz l6 oaced in a uniform electric field. Give a statement concerning the elx)rzlfoc 6ogr5) ,gv4ectric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere- i1l4 )pkzt6)ahzv pj of equal diameters are each given the same charge, the electric field (E) midway between the l p)vjtzaz1k pi46h) -center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where gdig8l 2g lm-em/t 1(4gk0ida37 wmkha uniform electric field is directed straight dg0d -iweg8mtk1l 2m3m7/klg ghi 4(a upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nearh v;,86ev b22tabtpek an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that p0kdnur le/ f/g,capkwjubp 4.qr068;3lx e4is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphel8. pu/bj;d0 naq6kfxw3ee4/ purgl4,r c kp 0re has

State three properties of conductors in static equilibriu 6jgdv/ta y5)ym.

State Gauss's law.

  The charge carried by one electrq83) xghsu. v imvu8*8h- lii ku6ywb.on 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 prot2(yhajs07ejai xl,s; ons than electrons does this piy xhjsl, e;js0(a 72aiece of plastic have?

  What is the charge on 1 kg oc*ecfbf 9.1l+ p aik4kf protons?

  An atomic nucleus has a m;98vl-jpgcj jch(pf fzbgp/si*6 9 /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 chargehxo*z, 8s5 /1lemrrqp values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force bezo*,mrp8/lh esr q5x1 tween them?

  A 1.0-C charge is 15 m from a second charge, and tyui46g8oj 4k3lp. tl hhe force between them is 1.0 N. What is the magnitude of the second cha y8 jll6ko.h34tip4ugrge?

  Two 1.0-C charges have a force betwec 2egk(ad(t 7wb6a pd5en them of 1.0 N. How far apart are they?

  The force between a 5p -xcb6x d(xk$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, in jp*tbo84ah y7itially 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 electric foj7 th*8byao4prce between them?

  Three identical point charges b5 jydr:uju1 7. 6i,co jac-wvof 2.0 mC are placed on the x-axis. The first charge isjbcdau. 7c,-jiy1 j6or: w v5u 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 the charge at the origin?

  Three point charges are placed on t/ jcw+:kay5+k 4r6 jek u5xkzphe 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 forcwcka +5:rx k6ejjyk u+k 45pz/e which acts on the charge at the origin?

  Three point charges aro;-e ubzd 8ro yb)er1w+yk18 je 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 = -1.00 m. What is the magnitude of the force on the 3.00 kybd8;jzewy-o8rr1 +e1 ou b)-mC charge?

  A point charge of +Q is placed at the center of a square, and adaw (te y9tnzr1e0dwl r0.mhfh: 9)/k 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 posi0w:nd ewrtfl9y khdtm)/1 r9 hzae 0.(tive 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 m); Q3 = 5.0 y;t9,ew:h lka .k ;x9ab:h:ageng(qbnC is at (0, 0). Wb :an bw:tkekgah;h(q.gl9;e :y9a,x hat is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0 h*fiaj0pmn /pn9fl (9); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at pi 0pfj* hm/fa(l99nn(0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC atj2 + 8t: g4n3;w; vsqlqabpvvre placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitu vtn28l3 vbqv;q+pjsgwa; 4t:de of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Qt2 py;yky5v4r and +4Q, which are separated by 3.0 m. At what point, on t ryp4k;2yy5v a line between 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 = 4p2tdm y6dg 6;x.0 m. Where on the x-axi62 m;dypxgt6ds can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placelzb7 45wiqjw7 4extara 5 j31yd at x = 2a. Where can a third positive charge +q be placed syq1bwr7 3zw at5ij44e7 5jaxlo that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total of7uifwu 5 n0,mq $4.0 \times 10^{12} \; electrons$ 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 o*xkju 4vf dcs)/8bvm7f a fixed proton some distance above it. How far abo xfv 8bud/v 4j*)smck7ve the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting .2ckilcsig7vpaa( 80 threads which are 30 cm long. 7v2ikc(gal a .p0ic8s Both are given 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 o +u2iz)vlb7 xvwh.*dnv; n,qeszy):jf +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nuclehj v*vzl n+sn2w :uexvz ,))y7;.idqbus?

  What are the magnitude and direcnx+/bk( n+ ggution of the electric field at a distance of 1.50 m from a 50.0-nC / u+(n+xbkgngcharge?

  A 5.0-C charge is 10f7 xxxix:ak /:sq*(0 vqpb w idyg9;.0rqfco4 m from a small test charge. What is the magnitude of the electric field at the location of yqcsx bk*07p:90iv.;:qd/ixf4ax wo fr x(qgthe test charge?

  A 5.0-C charge is 10 m from a small test charge. ka1 f-c5 ehd7amagxjf;(*q0iWhat is the direction of the ele ixfakema0f; dgh (j517*a-cqctric field?

  A 5.0-C charge is 10 m from a small test charge. What irfe pt3mb4fx7j96 7fwzy uuh9a-.r+a s the magnitude of the fof6bpuer7hu+3af9ax w97jf4 -.mtzy rrce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0awtg /d2o2zbr4p s xg;0rs:+m rs-vt9 C and are separated by a distance of 4.0 m. What is the electric field at a point midway betwe +twmd2;r2 rszxa-gs09:4rgb vsto/pen the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 k0,mm7r hvik. mC charge hkv0i.,7 mkmris placed at 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 a -4.0 mC ch-)8 ;zrvrvp6 -ni0 q pw-h(elwa ph1fbp n-cx:arge is placed at the 50 cm mark. At what point on a pbhc neqi -xprfvn: a-)-(8;p1 6wpvl -hw0zrline joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placeda( p).j egla5q+e6,e7 s mrcpb at x = 0 and x = 0.20 m. What is the magnitude of s7a eqp (ar, m jeb)g.56plc+ethe electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sidq- /4c6cywhskpd 83 aoe 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cen-csyqp oc3kd68 4ahw/ ter of the square.

  Consider a square which is 1.0 m oa 5 6i,um lfpo*ama),gn 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, 0mafm*og,p 5,la)a 6iu); -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+ l fp7aokso /-e-cr3gqx)pf5 electric field. What is o+rfpsgl f e x5a/ckq-)3po7-the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a masvc1 fpu53vfq1q9. hps yotq2+s 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 electric field of 6000 N .8.:(; pmonhct avoxn/C pointing downward. What charge must be placed on the balp.n .xht:v 8mo;ocna( l for it to be suspended?

  A foam ball of mass qpfu/po.vn ./zp0- t82cnuoq 0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended afuu0 8/vp coptpqn .qn/.2o- zgainst the force of 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 is the magnd f 0az(gj)q)zitude of the electric field 5.0 cm from the sphere's surfaca j0(z)d )zgqfe?

  A metal sphere of radius 2.0 ck(c6q2trt/d0b s7 cpim carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of 0 s6qi/rcd kcpb(tt72 the sphere?