State the law of conserva ;c 28yvdhu,fltion of electric charge.

  Is it possible for two negative charges to attrac2p/14t- nmkmi qi rhfg2kn68ot each other?

  Is it possible for a positive and a negative charge to attract each at 9oyts6 9w; 9bg uzrg7x4ru7other?

  A glass rod is rubbed with a piece ofee7brpdgsda*u 6l; tx, l y(mp4*10no silk. During the process the glass rod acquires a positive charge al xb(dnd0am6ugs* ; pr,4top1yel 7e *nd the silk

  A proton carries a

  The model of the atom shows:w9dt o1u7p ls a

  A neutral atom always )3 6v(fu)gi( n ihr. p73uwb)sljhds lhas

  An atom has more electrons than protons. mf7yg xl5htux o w8f9 f a7dl+jr52o1:The atom is

  Materials in which the electrons are bound very tightly to the nucley 1 gaa*7ciafdmgd;f 4e u9a5op8o4 e2i are referre4e4g7oay1mu a8pe *gfdf59a;ad 2oic d to as

  Materials in which the gb,lle+ayx8 v(,ya (l electrons are bound very loosely to the nuclei and can move ab(eyax, a+gy (lv8 bl,lout freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar16qc:+kwfv,l8eqw3v0vw-6ac x z i4wr2 b bw m. The end of the metal bar vmxrw3 vql w,a:cewv-c8bw 4k fz+q2b 0w616ifarthest from the charged rod will be charged

  Sphere A carries a ny(qsx6 f g vfw1d68fr6et positive charge, and sphere B is neutral. They are placed nears1wxdfqv686g6fyf r ( each other on an insulated 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 positq;z9z txwpvlzih--2;t6 ls;y ively?

  An originally neutral electroscope is briefly touched with a posm2/bmsx/+v:m wiwz 8sitively charged glass rod. Thsziw/ v2 mxmwm: bs/+8e electroscope

  An originally neutral electroscope is groundednmz:vf )z82 ru briefly while a positively charged glass rod is held ne)nrfz vu2 z:m8ar it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electr *ck56z-n psmo( eiz:caa- b,zoscope, and the leaves separate. Then a negative object mo--zeczc6 ,b: az5kai( s *npis brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral -ujmdab0a9 vd ,4vcp*metallic 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, st*d pa4bj ua c,9-v0mdvrikes 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 xdo3t v.t- nuse5nvr+)r 8kb7 constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firsaf7.1mi+qy*w pld w: fz,5wy gt charge is larger in magnitude than m 7w g*:y1qwpf ,.widyf5+lzathe second charge.

  Sphere A carries a net chztcc(kjl d/- (q:m-ro f f:r ck;520 anjmop9barge and sphere B is neutral. They are placed near each other on an insulated table. Which statem:f m;t-a rmk2k oc d/05cqfr (p9bc-j(:njlo zent best describes the electrostatic force between them?

  Two charged objects attract each other witca lvg p9+lj9i* n8zupg u.q2m;w+ ez,h a certain force. If the charges on both objects are doubled with no change in sepaquuwgnjv * lea9p,9.+z+icz82g ; plm ration, the force between them

  Two charges are separated by a distance d and exert mutual attc,80ytx.0xz r ykb ua3tt8dg: w5xd i0ractive forces of F on each other. Ifa8dkgz03 y,.8it uxy :wt0tcx5dbrx 0 the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to th 2t0gcnx)dlv* e force between them if one charge is doubled, the other charge is tripled, and the separati*lc 2 )t0xdgnvon 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 happ8wr7suyg*bm v55:s,rv6hx i2ab 7b mxens to the magn7svy,*ix62r7 x h5vb 8bgs:wb m5uram itude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dista :j tgirvp(9ky)er(x l: n i3*nor+onl3p0w7ance of 1.0 m. What happens to 9 a:piln twy*e n7ln3pg)oox v 3r((ik:jr+0rthe magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separ/g,:3 z wu3+z:jqzjc4,dvuc4 hempg5 )b nmwr ated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is ), u344/dmpzr:gcjgjwcmnbq ,v5: e+ zzuw3h moved 0.50 m closer to the proton?

  A point charge of +Q is p;q7tf : gyplu/laced 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 three corners of the square. What is the magng7t: /fl;uyqp itude 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 (eq k.7ka wbg4equilateral 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 the other vertices? 7bg (wqak.ek4

  Which of the following is not a vec13 jy; zt)tqj1oa* z- 4vfbehptor?

  At twice the distance from a point charge,vuk g,fjoj5yzy41h,i fdwc06 i5 kg*2 the strength of the electric field

  Is it possible to have a zero electric field value between/t9*slpt: 7 a b5nqbgy a negative and positive charge along the b59btnqla sgy *pt/:7 line joining the two charges?

  Is it possible to have a zero electric field value betwex7qig5c 1:zzqen two positive charges along the line joingqx5: q1i7zzc ing the two charges?

  Electric field lines near psitiveps9tr; aia 8j1 point charges

  The electric field shown zr78 shx,fkq9 -jgmc.45csxc

  Can electric field lina dvy 4ru8r ,az9y.sl.td4o g,3hlc; ies intersect in free space?

  A solid block of metal in electrostatic equilibriuxfg m0 +z r,gjrmb74* y.cyey4m is placed in a uniform electric field. Give a statement 7eym0,f g 4r.j zyrbx*myc 4+gconcerning the electric field in the block's interior.

  If a solid metal sphere and a 3u04eqrv d g sx do;sg5.*ne(qhollow metal sphere of equal diameters are each given the same charge, the electric field (E) midwa3xq5 0godgde.vqeu( r*n4; ssy between the center and the surface is

  A cubic block of aluminum rests on a woodenn,3ju 8 ckaz)z table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surfaceukz,8jz ) can3?

  If a conductor is in electrostatic equilibrium nearx bwr3oy:ga*z af79-1gco5 uj an electric charge

  A positive point charge is enclosvqd m+a62;oh ved in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the elec6+ 2hvd;vmao qtric field at a point directly above the hollow sphere has

State three properties of conductors in s9 3tq:ialmcmp:iyb . /;gjys7a92 xkwtatic equilibrium.

State Gauss's law.

  The charge carried by y4yt2/7.abvciw kv lcrp122a one 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 tv/2gn,w kqk vzi r*p2xgm(c90s q:)tprotons than electrons d x9rgvq 2cttk 0:w/(pk*2is,m)gvnqzoes this piece of plastic have?

  What is the charge on 1 kg o8(95nzfgdn tc gp /av.9bhkv9f protons?

  An atomic nucleus has acux fw(z 2(wd ihsxd+a o.87:u 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 2.0 and -r, fky 2kj0zv64.0 mC, respectiveljkz2vy fr,k60 y. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a sog((r7zwg-,m8 go gma econd charge, and the force between them is 1.0 N. What is the magnitude of the (og,-og wr ggm8a7(zmsecond charge?

  Two 1.0-C charges have a force between them .g -inzh36nct jap ,b1of 1.0 N. How far apart are they?

  The force between a z0ni8pn te,/l $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm aparbmi,)i 3via j4t, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electricivbija 4,3)mi force between them?

  Three identical point char czr:sp.b+ z;dges of 2.0 mC are placed on the x-axis. The first charge is at the origin, r:b+szc.d; zp 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 the x-axisn0ci0gb-+wi ug d.au ;. A charge of +2.0 mC is placed at the origin, -2. awgi00 dugc-i+. nbu;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 the origin?

  Three point charges are located at the following positions: Q1 = 2.00 h( ,mpacr7v;myk7.p x -/e sugcad2f4 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = m/p m.kr u ;4gafph, -c77acv(dx2sye -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 centerowdy0 cdb2)qs g2 f,e, of 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 third charge of -Q is place2dfgs cq, 0o w,yd)2bed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 mt43e wpyv nbe: ye6s-8); Q3 = 5.0 nC is at (0, 0). What is the tn-pe 8yyee36w:svb4magnitude 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, 0.10 m); Q3 = 5.0 nC 1 .4l o.gwsb,xj i6mgtxw 180qfw qiv0is at0j i.bxl1. ogwtm q,s v0fq4gw68i1 xw (0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the venop*(zgwy qppg j0i; gw0- wqse22 1;qrtices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whicp2opnw2yq(00 w g-i1 ;eqsw gqpg j*z;h acts on any one of the charges?

  Consider point charges of +Q and +4Q, which alq08 h z(emku x-**euere separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the eleculmk0h( 8 u-xz *q*eeetrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charg-o.7(yy nmn *x,vx yo+kz-l vle is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net forxnmv- ky7y+-yln xz(.*l vo ,oce on it is zero?

  Charge +2q is placed at the origin and charge -q is plac0gzjd3bk7tpy wq15 m-,8d sqhed at x = 2a. Where can a third positive charge +q be placed so that the ,-tgkz dsm05y h 1qdb8 73wqjpforce on it is zero?

  A copper penny has a mass of 3.0 g. A total61odi1wkp4ct7ze a(/i n7 mxs 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 forcefvl)t1i:x1 r 2u m:4ag a:tbmc of gravity by the attraction of a fixed proton some distance above it. How far above thbif1ta:t cgv )m : m:a4xl2ru1e electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by h3dgt w.a+t6 nnonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between ttt3 6ng.+wa hdhe threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude of t( ;/vt/stck3b(tauzmhe electric field at a distas/k(/tatzum(3b;t cvnce of 1.0 m from the nucleus?

  What are the magnitude and direction of the elec.+ +u7kuww en 6hkmz *k-eseo4tric field at a distance of 1.50 m from a 50.0-nC charge?7u .e- e+wu*n khew6+ksom kz4

  A 5.0-C charge is 10 m from a small test charge. What is the magnn0bu 3niag ,k.48 q3i:lxpyf+n gagj 5itude of the electric field at the locati:an4g8,l5qaxf3 k 0ug3ybpn+nigj .ion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directyi4y8z+ y r(qiion of the electric fiqiy8yz i r(y+4eld?

  A 5.0-C charge is 10 m from akrj, 08q-t moh7 lh)ea small test charge. What is the magnitude of the force experiencedaotk8rq7 hl -ehj0)m , by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a o/ ;pjy0df0h95t fioydistance of 4.0 m. What is the elfodth/ypf;0590y i ojectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma+cf9c /b va+nark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cca +ncva /+b9fm mark?

  A 5.0-mC charge is placed at the ).*yimnmtv *bqc7q 0 fborb.-0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charm0tn*oqbmc q.)ry 7-.bv *bfiges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 ajqrm8 i8pt,e9a /1mtmC are placed at x = 0 and x = 0.20 m. What is the mpq 8aetm1rm 9/a,tji8 agnitude of the electric field at the point midway between them?

  Three 3.0 mC charges ayxq fb:da9a+oh+r,x*n2:wsw+ ch 7w wre at the three corners of a square of side 0.50 m. The last corner is occupied by arxx,d*aww+2af +7c :+:n9hswowh by q -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 are placed at the corner0zyg9q0 yb.kmn h4 :hvs of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (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 :0gvh q4m9 0nkzy yb.hcenter?

  A force of 10 N acts on a charge of 5.0 mC when it is placed )hv m7-mh3x -9 njthz:zlsr5 gin a uniform electric field. What is the magnitudet xvz n9m 3zhhm -jgs):7rl-5h of this electric field?

  A particle with a charge of 4.0 mC han:h ujzzgga;2 x/.j u56s0rzl s 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 anqdh+: m 2/ ,aiqzuypgc st5t2- electric field of 6000 N/C pointing downward. What charge/hgs aquzy+ 2t,dcqimp5-2: t must be placed on the ball for it to be suspended?

  A foam ball of mass 0 4 igfx.al9:-vur,pdk .150 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. What are thpr9 x fd4ak:u-.i, gvle magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What iso3m rv6t63vm)dy9ih y+/cl fa the magnitude9o6+3dv) mli y3hrayfm6tcv/ of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius yq /up/ojl 8z-c 0fte52.0 cm carries a charge of 3.0 mC. What is the electric field 6.-pej / f5oct/qz 08yul0 cm from the center of the sphere?