State the law of consej (,a ri.4itonrvation of electric charge.

  Is it possible for two negative charges to attract eac1j1.r c1 7zn+xoj oeash other?

  Is it possible for a positive and a nex mkwl-z (q22xgative charge to attract each other?

  A glass rod is rubbed with a pov 9*l4qfav:9qp4s(x6j zrwg sq xm-3iece of silk. During the process the glass rod acquires a positive chpwvo64 aqx3q99 *4sv( -j slfzq:g mrxarge and the silk

  A proton carries a

  The model of the atom s 2vnlh on z8 (.i(lt fh-5cn0ooxfy4k1hows a

  A neutral atom always2ui2rw/;;ureu 6m :p nkpv e/pis9 mb2 has

  An atom has more electrons than protons. The ath az6uca jjeqd2kai 5v:-vin 6/ p-u0.om is

  Materials in which the electrons are bv))y mfxe rxmt:50q4q ound very tightly to the nuclei are referred to qxy:vr0mq))e mtxf45as

  Materials in which the electrons are bound very loosely to the nuclei and can mp/v wjd35c lb;94 )5uzwznlge ove about freely within the m9 3zwzc p5 dvue;/jlglnw)b45aterial are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. Thnc8 irw m4a+5fe end of the metal bar f8a n r5cw+i4fmarthest from the charged rod will be charged

  Sphere A carries a nbu;: ff +wmub4 -att-y m9r,1wlfs:txj3jcs 6 et positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is brie m f6f;fawxjs b34:ts-1ytbt u ,-9+cmrlw: ujfly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pos g38)3nkxxxpn5vmz7c itively?

  An originally neutral electroscope is (fssvtp/a/ .nv*eqk6 briefly touched with a positively charged glanp/q es.(a/ vsf6 tkv*ss rod. The electroscope

  An originally neutral elelhfwtva :l7;: jwz0 p6ctroscope is grounded briefly while a positively charged glass :ftav w0jll:z6h7;p wrod is held near it. After the glass rod is removed, the electroscope

  A positive object tou 85r/t i44 vgvti jxkd5hui92lches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Whavx4vrith4d95l i 5jk2gi/8 tut happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutr-lr0xo*wk8 lbps -x0bis q/k p2a.a z(al metallic ball rolls straight toward the object, but stops before it toucx*qpwbkll xsb ki-0pr (8s.z a0 -/o2ahes 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 the Coulomb consd0c vla(9y9a(,u,irtl;s qg i tant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge rs.) v l20eyqgis larger in magnitude than the second chargvq2).esg 0ly re.

  Sphere A carries a net charge and spscv h b7mu8yumy t74:piw+-2jhere B is neutral. They are placed near each other on an insulated table. Which stat7y84j s uvb7tym2mh-:+c pwiuement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If .jay-psj* i5t the charges on both jj-5y*t sipa. objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual at1/r+f*,6vohl:bt *lr )+vnrcxldmzc tractive forces of F on each other. If the charges are separated byrm 1lh ,rn6l+c+rt*flo :dvcbz*vx/) a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happeq qkg l etl0*b.m4b52cns to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reducedbc .keg 4lqq0lm2t5 b* 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. Wfnflo; a1-x5that happens to the mt-1 lxanf 5;foagnitude 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 distancwhs9owd08w)2ahh )( no ;7kjak7zhv se of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the proton?8hon;jh 779vw2)akzkwdh) (oa w0hss

  An electron and a proton are separated by a distance of 1.0 q -u/2swcdxu-m. What happens to the size of the force on the proton if the electron isdq /2suuc w-x- moved 0.50 m closer to the proton?

  A point charge of +Q is placed at)rzmj4kjfq 8z)*u s9 m the center of a square. When a second point charge of -Q is placed at one of the square's corners, )q)mzs4 9kjuf8rmz *j 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 ta8h1gs j 6q(ythe 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(ahg s6q t1y8j force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followi 46th0qld+eq r4s26krnder r3ng is not a vector?

  At twice the distanco:kq1j hc+ ho2yqpyjt pyeo5z849t* ;/ : swmbe from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value betweep.c94hayuv r.as/iw1 i0 a,xln a negative and positive charge along the line joining the tw10w9yuhs / larvai.iax cp4.,o charges?

  Is it possible to have a zero electric 90fhfr i j-q8b(jgq b7field value between two positive charges along the line joining the tw jb jbgi-8h f70f(qrq9o charges?

  Electric field lines near psitive point chav0oxv/ 6d3xdkm)n +thrges

  The electric field shown bmxf ; bp3i*v4

  Can electric field lines intersect in :qqja djcwd,av/zh 2+ u 2z9-efree space?

  A solid block of metal in electrostatic equilibrium is placed in a uniforcp4y(1(6daq:wfh vzc6 ej 7c bm electric field. Give a stateme cw((f qe1 jpc4y7avz:c6 h6dbnt concerning the electric field in the block's interior.

  If a solid metal spher -rw*q8:e q+yhh 2nmhje and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center +q*rqhh:8mwh -2yj ne and the surface is

  A cubic block of aluminum rests on a wooden table in a region where x l+b xtad19,r)apm*/q6ru k ca uniform electric field is directed straight upward. What can be said concerning the6c xbkrdt a)q/l,p 9ur+*mxa 1 charge on the block's top surface?

  If a conductor is in elp tmr5 be kj+41q2utn3ectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollowpmv ju7 tt19op-/ zew(re) ce/ metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point 1ejue/vp cr-7woezt9 /( tp)mdirectly above the hollow sphere has

State three properties of*co3ff p)jlw,g7uto: conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elec,y0 lqne( hqp-tron 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 charg +7ijz,-zmx uxe of +2.00 mC. How many more protons than electrons does this piece of + ,-xmz7zjx iuplastic have?

  What is the charge on 1 kg of prodzu4ona741f slyh7+ btons?

  An atomic nucleus has a charsj5tx.2 xs slw+ +dj7sge 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 -4.0 mC,r70f(l5 zueqv respectively. q0lzr7 eu5v (fWhat is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the forkpq1 45p;ichvv*. q rsce between them is 1.0 N. What1k;pqvv c.ph*q4s ri 5 is the magnitude of the second charge?

  Two 1.0-C charges have a force between vpkzi3 3:yfl04hcah6 them of 1.0 N. How far apart are they?

  The force between a g4fxy* bw( wnlk r/5*+wxc e5s$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initiaxhzne 1nw 67oe(te5s; lly 2.0 cm apart, experience a 1.0-N force. If they are moved to a e;onnh e6z(175txe swnew 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 od;b,)h gxy100pkbtacharge 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 direction of the ep 1;thko0bb,gdy0 ) xalectrostatic force which acts on the charge at the origin?

  Three point charges are placed on thlg lrh8p .f8 s uek8+g)wth(c9e 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 akfehl)gwgt8 sr(c.l8ph 8u+ 9re 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 mC at x v ,uud5l9bw6a= 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 char aw v5,ubl96duge?

  A point charge of +Q is placed at the center :ngfd trn 395rof 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 placed at th:ng 53rd9nrf te lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC ib;x*u+ ix 9kgus at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0u*;9x b+ukix g nC charge?

  Q1 = 6.0 nC is at (0.30 m,c3(gn av06(1ffom ,dzh, expv 0); Q2 = -1.0 nC is at (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 chargevv0x(gn pam6 13(dcz,f foeh ,?

  Three identical charges of 3.0 mC are placed at t1m5vlfyg5wjdrqps6v61; 8 axhe vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the ch f8665wvy5 xdjqv1pl ;asmr1g arges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. Atslx;(g8jl -bmhr z47o what point, on a line between the two charges, lox;s8(zj 4 mgb hr-7lwould 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 uo k15 *ujbhr v0vg6gut ;hp)jx;x.0w is at x = 4.0 m. Where on t*01xgrxh p v;.ujbho 6v5tjwg ku;)u 0he x-axis 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 placed at x = 2a. Wqt: p3,yh9jgz4:6bh qv(x uyfhere can a th4fu6hq:3 yp9v: t zgqhjx,b(y ird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totf,axw)m6* c4 abn /qwgw9ke, mal 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 force of gravib8n.z-*: u8sje c tiurty by the attraction of a fixed proton some distance above it. How8 uisj:ub*-8tcn .z re far above the electron is the proton?

  Two 0.20-g metal spheres are hung from(zp( sp-+so.zncsk m*lg 2ba:vicm(( a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle bs.os(galc- v m i* p(z+:(mzspnbc2 k(etween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is thep17sn l2,bfk 8w4i7yyizny/k magnitude of the electric field at a distance of8n7l7kzs, kby y p iwnfi/21y4 1.0 m from the nucleus?

  What are the magnitude and di) 6wtr12funj, fjit/x rection of the electric field at a distance of 1.50 m frofn6/w)t 1 r,ix2tufjj m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of t;lejzf 1we9.x he electric field at the location ofl x1e ;ezf.wj9 the test charge?

  A 5.0-C charge is 10 m from a small test charge. op8 w4 syv9yw)zp8hc. What is the direction of the electric fip ych9s z.yow) wv84p8eld?

  A 5.0-C charge is 10 m from a small testu-v 1o1* czh0,dejc wq charge. What is the magnitude of the force 1-w0q,he1*uov jdc c zexperienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a valugy19ijy xa ro72ve*q;e of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midwaye yq1x*oj9vai ;y2rg7 between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a mex7.1xo h -nfqkoo6yx+ ter stick and a -4.0 mC charge is placed at the 50 o-y ohxq1 x+ o7kf6.nxcm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm zsdmt 3nl -hgrj93 y3zx*;dub+ kmj+(mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mar-3dnbhljtx * zyd9u3+jg;smm r+3(zkk. At what point 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 =;3a-+ow zi+ f-h) tlwafgxu p. 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between them?o;wuf) -+.fw axpzlia3 -+tg h

  Three 3.0 mC charges are at the th( ow2p ;13cput6d fi jjek6q)cree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC char3p p ku1c6fe)oc(t2;jdw 6 qjige. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are phuy g 4ym2z21u8+mqh: d ima1v*u( nhvlaced 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); -3.0 mC at (0, 1). What is the magnitude of the electric field at the square'1zdv1mh+ai 4 :hm*m8yh(u22q vnugy us center?

  A force of 10 N actssk7)gq,rk-av gp -qh/ on a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude,s-)hg -gq7krv aq kp/ of this electric field?

  A particle with a charge of 4.0 mC has a mash b161j/7cc8 2 8hh; q7i yutctsnynbos 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 ncu+r 3 .1i .dioye4fiN/C pointing ir. ie341+dnf uioy .cdownward. 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 -2.00 nC. txb2effk n /l*a/,*o)gr, xfcg 6gv5h The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the ele,rfvx tf/bg/ oxa6ncefgh*2l,k 5*g )ctric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magninv(1co aya2 p1tude of oy1 1v(2c paanthe electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What isse7nx+ut6j4le d20 m9lo 8v gwa(kl2t the electric field 6.0 cm from j0 ueto g2tl+l6e2m87n9 kas4wx(l vdthe center of the sphere?