State the law of conservai2u,scrdrb/o/s s;/ w l 4oih/tion of electric charge.

  Is it possible for two negative charges to attract eaca gzis2v4-0:nnird sisc :/1uh other?

  Is it possible for a positive and a negative charhnbqr;es+e 5 ;ge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rru knhq 5xd90v4fl.1yod acquires a positive dx .lq1 09uk5y4vr nfhcharge and the silk

  A proton carries a

  The model of the atom showso:*rvb.9gx50a 3wkwaa lvpk/ mb3bh8 a

  A neutral atom always has,t80uz n7yrtm)r * mfh

  An atom has more electrons than pr v6*:zjlol. aaotons. The atom is

  Materials in which the electrons are bound very ti4k, e/di un 9(ak5nzbkqw*c*p5c bb)q ghtly to the nuclei are referrqq(inkpbak b *w )un4e/kc, c5*95dbzed to as

  Materials in which the electrons are bound very loosely to thee-hqqh/z: g .ebf 3g:6uuab*e nuclei and can move about freely within the material are referred to as-eezu6:bh 3qfq g b:aeg*. u/h

  A negatively charged rod is brow:, /h cuu()ttu)yzj-7y 6(h x zk):x vfvkotgught near one end of an uncharged metal bar. The end of the metal bar farthest fro xwt)h, 7u:xko/zcvy6kj()tghfuv- :tz (y u)m the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are gaa vl1 ;5vckr( zie6-,zdv d7placed near each other on an insulated table. Sphere Bzv1( a g-c7vdadl,rize 6v 5k; is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope posbjzbw* ku8na lm1 -hv, j oeo8n,:do:3itively?

  An originally neutral electroscope is briefly touched with a positively charged+xt2o 3 +jiq(u)eaq oa glass rox( ui+q a+joq2ae3 )otd. The electroscope

  An originally neutral e; cjglb.qhn8(lectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod jnl.c8 g bq(h;is removed, the electroscope

  A positive object touches a neutral electroscoea+f- fl x-l;llm,uqnivt) 8- y1nmo (pe, and the leaves separate. Then a negative object is brough8imy1x )n-ue+l-(f -lqo,mfnvll;at t near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objec xce dipw+2p)0t 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 rox2d e)+cpi p0wlls 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 the Coulomb constant:vk qau hi,bgqsu)8,:pn++ fb $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Th r8tdqrcr 0x1bd3*ev s3(k:plup 0 (wae first charge is larger in magnitude than the second chargpd * dr xrwp0vb(l0(ek c rua31tq3:s8e.

  Sphere A carries a net charge and sphfan1p e+d*n5r ere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatirfpd1+ 5*annec force between them?

  Two charged objects attract each other with a certain force. If the chargepfgmpk( l1ne4y )o+q0s on b+k qfo p)gmp0(lye1 n4oth objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attracti2apget5 s; 7wdve forces of F on each other. If the charges are separated by a distance of d/3, w7esga p wd25t;hat are the new mutual forces?

  Two charged objects attract each other with a foj)/f.-hoz aqpn bu6. frce 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 ujqzbfh/ -ponf.6 a.) is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance ofeo x21yj1 k.ye 1.0 m. What happens to the magnitude of the force on the proton i jyoxe1 .e2y1kf a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happe4or 0g i5(b 7vbwmvdp8/rm fh.ns to the magnitude of the force on the first8 bhr r(i./fgb4 pw0ommvv57d electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. /l+k+ zkojr ( o *ti4fl9qrs;+byhd( t What happens to the size of the force on the proton if the electron is mosryqjhf tk(l+ i4boto*d +r;(+/9zlk ved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poin no0zm hbb0clm18bz yph8du9gh*g211 t 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 square. What is the magnitude of the net electrostatic force acting on the positive charge at the centeru1ndzo 1ghhc *hm10bl80mbyzb28gp 9 of the square?

  A point charge of +Q is placed at the centroid of an equii3st-+g sndo 4wit4 *8v r.adylateral triangle. When a second charge of +Q is placed at*y-dtnw.isi +4va g3t 48rdos 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 not a v5gy:bcu y m:q 2o(kt/ h*dkh4u v+eh6dector?

  At twice the distance from a point chw.ojg;z( rl0warge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative an:v6fgpixuw 68f7br ) ud positive charge aloff 6 g6puvbx78rw:) iung the line joining the two charges?

  Is it possible to have a zero electric field value between two pqa 4e4bw ,wre37 g5 ttwl-5foqositive charges along the line joiningeqeat fwlotw55-w43q, b4rg 7 the two charges?

  Electric field lines near psitive powh0 zjnhy0 8d:int charges

  The electric field shownu-t4g n(q6u: n- n6csvj3z zwb

  Can electric field lines intersect in free3hkw)8 cnmw k(:-uxq6k p3 rbs space?

  A solid block of metal zkwf fww6dl-a4- r-ru ag.)j,ps m.2tin electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field-.r w)da j2-f wkrau,tz6.w- mfg lp4s in the block's interior.

  If a solid metal sphere and 9 -dp(4riw7p pcyd -8qfswa1ra hollow metal sphere of equal diameters are each gidp(qf d crprp 8as-4y1w9i7-wven the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden taz 5-h,2+ptqj1qw est1cu4jjuble in a region where a uniform electric field is directed straight upward. What can be said q tu1schj-uet4pq+j,z1j 52wconcerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near anyru l) gh oft(,hs63dp79aw )w electric charge

  A positive point charge is enclosed in a hollow metallic sphere that 3qc0u:0pkhafl g 7hd9is grounded. As comp hdlpka7u39hf q00c:gared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three propertin*i g63rk.n;xxsf;xq 8f2dbn u 4)lyces of conductors in static equilibrium.

State Gauss's law.

  The charge carried by onc 2pmik9d,3xni90 ui we 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 u:*:agp x6tq pof +2.00 mC. How many more protons than electrons does thg::axu qp tp6*is piece of plastic have?

  What is the charge on 1 kg of promapfb 8r(a mac +lvany4 30b1(tons?

  An atomic nucleus hawz+, rzn 3bm*ns 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 clxf;k6g1hotv qgls1 ,/ u/n1lm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric hn x1/g1uq l vs glfolk1/,6;tforce between them?

  A 1.0-C charge is 15 m from a second charge, and the forc,xds, 0vrqymsrup,oh3j( - 5ye between them is 1.0 N. What is the magnituqxj dm5,usyyv ( rho-,3p sr0,de of the second charge?

  Two 1.0-C charges have a fob)*v 8gqu 99t moy:kyarce between them of 1.0 N. How far apart are they?

  The force between a *n-.v0uo dephsf69k p1in 8 z7jiy pu:$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expe 3 q2/(y0fvs*ru fyukarience a 1.0-N force. If they are moved trk *q0fsy vu/u(2afy3o a new separation of 8.0 cm, what is the electric force between them?

  Three identical point ch,.qwau gr6vc3h k5cow i6 - .h8)gffcparges 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 magnitud vaoqcw8u5gk3c6rhw-i , 6cf.fhp g.)e and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are plaip3s 2nq3 c)ycced on 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 thc3yncqs 32) ipe origin?

  Three point charges are l swl f5a/7t +//s*sj vtoblkl2bvtb .2ocated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at fl+a.b5/wts*v v/jklss b 2o tb/2lt7 x = 0; Q3 = -5.00 mC at x = -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 q0hr.u.p1 v7hjn m 0*gc/sjirof a 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 a r0cjg0v qmn7/s. ihj1hp.*ur 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 (s, n4xjs9xt o*0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnit j4no ts,xxs9*ude 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 o vo467-0dk,m:p iubhf/yxii, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the directihkbv6,:o/4do7 -i0 um xypiifon of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are pla gluuen75wg;x+ w.tjcpd(g4zpvc 6/1 ced at the vertices of an equilateral triangle wc;z xcgpuw14 n5g le6p7/(d.j+tu g vwhich measures 30 cm on 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 separate1(k2avq3of0 z lojpq bae0x4rv3 y98dd by 3.0 m. At what point, on a line bej3 b30kdapvvoqx0q( 91 y 8f4aoezlr2tween 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 orei; j7 gkeh20gigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force oi;ge 2j7e0h gkn it is zero?

  Charge +2q is placed at the origin and charge -q is placed at anv;nff s3i+f9 l)e(t x = 2a. Where can a third p 3tf fes;) fvn+anl(i9ositive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. 5w gzvo3ch0/w woi66clmu0 b4A 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 o4g0 occrp7r5force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the protonco 074rr5ogc p?

  Two 0.20-g metal spheres are hung from a common point by nonconduct6 drs4ig9nz5b ing threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the46 d9r5zg isbn threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. Whal0aj q+nfwb ,:t is the magnitude of the electric field at a distance of 1.0 m fro:fw0+n l jqa,bm the nucleus?

  What are the magnitude txka e:8y qapa,(*f-s and direction of the electric field at a distance of 1.50 m from a 50.0-nC f ,yx(8*k-a ep:qasat charge?

  A 5.0-C charge is 10 m from a small test charge. What is the iw i l1gc0-(hqmagnitude of the electric field at the lg-h 0i1w(ci lqocation of the test charge?

  A 5.0-C charge is 100m dl)ik ;ezyum a)+fml;5y0o m from a small test charge. What is the direction of the electric field;af omumz)k5;0)i +0lyym edl?

  A 5.0-C charge is 10 m from a small test charge. What is thexr o387,0g/ se1 1vruwwsvbgs magnitude of the force experienced by a 1.0 nC charge placed at the location of the tgv,svx/w ss 118ubgwo3 7 e0rrest charge?

  Two point charges each have a value of 3.0 C du6e96lf*lpl and are separated by a distance of 4.0 m. What is the fl6 e*lud6pl 9electric 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 z8v yyn93 xupgndwz g.r* m 3yt8 l-u975nnln4-4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mar w-9 73vx8n3 *pny z.lg9tu8mdnrn5zluyy4gnk?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stw 7/owa;f;ym uick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joi /y;woa;u f7mwning 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 m oxh/k y(h n v7be8ggrf*.0/jdxc p5;r. What is the magnitude of the electric fielho8p/x7*(n5bj; h/0r. vcrg yxegkfdd at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sidl/ ; bjg z ctq+3w2l6e2mtzdk6a0 hlw0e 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of tgabqw 2j tzzl0c6ehld ;3/+ mt2 w0lk6he square.

  Consider a square which izdh lx; e+bssf49+ ,lms 1.0 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); -3sfz, dh ;e9xsl4+ml +b.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 i pm:vyl uw+24qn a uniform electric field. What is lmv:pq 4wu+2y the magnitude of this electric field?

  A particle with a charfmc)raqp-cz5 +gl0 )kge of 4.0 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 0.120( 9od1v)upb bq-w )cgs g is placed in an electric field of 6000 N/C pointing dwd()suov9qc-) pbbg 1ownward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.u*l:y 1 1(vouepp 3h(cww7wer150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Wha3weu:w *o(h l17ppvur1(cw y et are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0/d) kp 0pi h+mgthht;8wx,nn3 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfa hnn ,kt)dh3+w hi0pmt /p;8gxce?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What ifsaz:. qt* t:5ysxtram*.b9 gs the electric field 6.0 cm from the center of th*ra f.t5z*b my9 xq ss:ag:tt.e sphere?