State the law of conswe,c 7m/ pai h1dj m,.-z8my8yn;bmgfervation of electric charge.

  Is it possible for two negative charges to attracss 68djpu,.d vsv5)ja v4t/uct each other?

  Is it possible for a positive and a n5 p/3vx ,fpim2vbz wl,egative charge to attract each other?

  A glass rod is rubbed with a piece cv,uzm+qo qbirniq9-k /9p6 ,of silk. During the process the glass rod acquir+6,-ki c rno9puzqm9/ q q,bives a positive charge and the silk

  A proton carries a

  The model of the atomjikamy; zvb65p18ev9sw 9l7 b shows a

  A neutral atom always has5; /ntxcth6. q+w xecjtlllp 4*5.gcd

  An atom has more electrons than protons. The atom25ta eqs5it 8f is

  Materials in which the electrons are bound veryov2j bfy;2 uu2 tightly to the nuclei are referred to as22bvujfo2y u ;

  Materials in which the electrons are bound very loosely to the nuclei and c zbl2rb((jw/ lo9b( zxan move about fz9x2obj bb(/lz( lr(wreely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged d,fs 01fbfp g1metal bar. The end of the metal bar farthest from the cs01f f, dbpg1fharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are planho5fy w+z*x 5ced near each other on an insulated table. Sphere B is briefly touched with a wire that is groundedh5*ywxf5noz + . Which statement is correct?

  How can a negatively charged rod c)9zf rjagol;-zu ;94 mh dqsuwqc2j+ -harge an electroscope positively?

  An originally neutral electroscope is briefly touzei2;vt p k9j 12mas9sd(br x7ched with a positively charged glass rod. The electrosco; jtzk2d9eb7v2rs 1am 9isp x(pe

  An originally neutral electroscope is grounded briefly l,i-vim kj(9r /exl80(pn nwm while a positively chargedme 9,n( rkivl xpj8/l0-m(iwn glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepa7yt4n:- e .glkqo/yte 01rkdmv- c**q as*glsrate. Then a negative object is brought near tqadqecm:kl*y-7v4o** .y ensktsgl- 0rt/1ghe electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulevf +zvt vf5g)(*l l0(bm/ z+gyc3tsiated table. A neutral 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, strikes the first ball, and stops. The first ball rolls forward, but does not touch the gfz+m3 l iyvsc f(0zt5gvtb +(/)v l*enegative 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 con09oio4;gbz)frum( /v s yqf8/ gc5 .,gigwisrstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The ax25 -.8kq7 mm/cr zedoto4 oaom08yl first charge is larger inm otr0ac mo2/o.4kx 7dm8 yazq8l5eo - magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed n 95,vug was(fgepq,k* (sp 9fdear each other on an i* g qg ,9s k(9(uvepw,f5fdpsansulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other wi6xtpv8ja k bflk8oxxt 56+6e6th a certain force. If the charges on both objects are doubled with no change in separ56 kxetx6p b 8kx6flvt 8o6ja+ation, the force between them

  Two charges are separated by g af nbu)23rci0,tm:a ue15 iaa distance d and exert mutual attractive forces of F oeifa,m u5uca): 03g2bia1rn t n each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a fx3.ai 1oad*tqorce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separatio3.iao xa1t*qd n 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 1a9cv 5ijlb-asx793 *eya(qny.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electroyas lb cneia*( v573y9qj-x a9n?

  An electron and a proton are separated by a distance of0)b+khxd cc: bo f,f,u 1.0 m. What happens to the mag c hu,b+ox: d)0fcf,bknitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are7-p-ow n/a-1mp h fepi 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 closep o--inhwm 1 -ap/e7pfr to the proton?

  A point charge of +Q is placed at the center of a square. muf0qh .,wgf3 re*7sw When a second point charge of -Q is placed at one of the square's cornerse0f hrf w73,ms qg.w*u, 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 the centroid of an equilateral u9h7ccpg evz ij+- 6,vtriangle. 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 cv ec-6j+7phic9 ugz ,vharge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is n3p pu rfc-l;,got a vector?

  At twice the distance from a point charge, the strength of the electric fiel5zs7bszn 06inp p lpu .k-l:c1d

  Is it possible to have a zero electric field value between a negative and posikvl*l1kub tg4ef97tu1 pr .e5tive charge e9 *rfvel 14bkut5tk gp1.u7l along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive chauzjt0lkv y*2x+vo;f4 g:t*cerges along the line joining the2lzy 0*gvuk4*:x+ce v o;fjtt two charges?

  Electric field lines near p edschj /-7x okysb06*sitive point charges

  The electric field shown s*,na3y4ce hn

  Can electric field lz7q4dau9 ia :pines intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed g4ahpn en:bylh4/6vib0a)pet- t7f9 z;ovg 3 in a uniform electric field. Give a statement concerning the electric field in the block's inte0b vaf p:ah) vt 4gzng76;y e3 9e-bopt/lihn4rior.

  If a solid metal sphere and a hollow metal sphere oru2l ;(hma* f.ti0qjua:cpa:jap j2 3f equal diameters are each given the same charge, the electric fiela2hlmp :*uji0ajat ar: ;p2f.cjq(u3 d (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wheri /d+x h io8a;2ofgjz8e a uniform electric field is directed straight upward. What can be said concerning the charge o2;xjioa f8zhigd8o /+ n the block's top surface?

  If a conductor is in electrostatic equilibrium near an p3.oa , ly5ssjy8x9mf electric charge

  A positive point charge is enclosed in a hollow metallic sphere z:k:nv l1z0w rthat is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sp:ln zkrvzw:10 here has

State three properties of be, vi3; yg5uqconductors in static equilibrium.

State Gauss's law.

  The charge carried by one electw5 k-(wqlnr.i ron 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 nemc5gz rnb0+(go g ;h(et charge of +2.00 mC. How many more protons than electrons does this pimr egbgc+g nhz ((;o50ece of plastic have?

  What is the charge onl8bt *qlk tu6,e5s8h y 1 kg of protons?

  An atomic nucleus has a 8mv7uwkmi2 (m*g1 gp ku9of;lcharge 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, k 1p(9nuqkmurg un8* -have charge values of 2.0 and -4.0 mC, respectively. What isu*g8qnrpm9 (1-knu uk the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, anz+v kg97 bz8su48ioind the force between them is 1.0 N. What is the magnitudng ius8b47o z8k+ 9zive of the second charge?

  Two 1.0-C charges have a force between them o3e j0e k-jvi lf gp,dk9gwh/ p(j6f26of 1.0 N. How far apart are they?

  The force between a a u/55b6z +ew ,aeaffq$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, e6(jty (la- ejusw-6nnak h-)experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric for(elhnaj -66-neasy()k j w-ut ce between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first ch ;n10n8tihj d0i,ao auarge 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 direct ,nd0i;a01o8n iahtujion of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed aq shjvjps7cq.cfbn1f, -v15 4o3;sz zqb05 fon 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 cf4,ob.ba0s5;jq hfp11 zscq75v- zf3 jqvsn 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 mC at x =l1* oos:+, qwajczb+2gv*xfi 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 co qf o*1x +,2*+balcz:sgwi vjharge?

  A point charge of +Q is placeu fp,h(eza :b)g:kc4dd at the center 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 c(eua p:f,z hk: bdg)c4harge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 o jcmf3q7gd 8fq /ohd:6mpy57 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the f qm :h5ody36g8cqpf7 7odm/jmagnitude 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 nCcbrt5 q2qmt3c-0:j b* eikf6d is at (0, 0). What is the direction of the net force ofqk jr3*q mb:2dtce c-6itb 05n the 5.0 nC charge?

  Three identical charges of 3.0 mC are;gr47xb0tkdrauf0+tg 6d4 t b placed at the vertices of an equilateral triangle which measures 7;udrf g0gtatx0db +kr44t6 b 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 se) 8leqtox;: xqparated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q o );lext:8 xqqsuch 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 = 4.0 m. r 07cwofzpcma 1; :2hcWhere on the x-axis can a third chargcwrc2h; f1o: mpca 70ze be placed so the net force on it is zero?

  Charge +2q is placed at the origin and chu6/,cko 1* n 7yq(,kn eapycvaarge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the pv1 7qyyk*a(/ c oa k6n,ucne,force on it is zero?

  A copper penny has a mass of 3.0 g. A tok/ wzm y/gxrl3v l)7k9tal 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 gravity by the attractixel 1(n 9 zxm)dud(4zgon of a fixed proton some distance abo)z( z(1xnugdm x4ld9eve it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hune7t7k 9io j6llg from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apari79l tjo kl7e6t until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is thewo +rb v03vhevorw. 9*h 3,fkm magnitude of the electric field at a distance of 1.0 m from the n+ vorb*3wmre0ofv ,wvk 3hh 9.ucleus?

  What are the magnitude and direction of the electric r m*jax/sbp 5+kcb2 aw 9sqm8+field at a distance of 1.50 m fj+wa *+maqs2 89rk/sc pmxbb 5rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small testc+lc+f a9ni k- charge. What is the magnitude of the electric field at the locat nc+c k-a+lfi9ion of the test charge?

  A 5.0-C charge is 10 m from a sjkwvtq *m8w1mq;2m ady 2 ta:9i,+eajmall test charge. What is the direction of the electriq8:awjei dv ,kt;9*t2+1jawmmay qm2c field?

  A 5.0-C charge is 10 m from a small test charge. Whax dcpsfw cc a,x xj 3q*4(5s4e;k3+bwgt is the magnitude of the forc;s4 k xc4w+ (x3xfapqg5*3weccj b, dse experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 zmz s.d a c83a bw-qn7-+db00g/prrcsC and are separated by a distance of 4.0 m. What is the electric field at q8ass n03+b.g c/z-rd0md- cra pzw7 ba point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of -kox)l*/bh m,wo(n.c got3cda meter stick and a -4.0 mC charge is placed at the 50 cm mark.o x/w t,3 cb*noklgh) .cmdo(- What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark ofoh dn(+ h*n*z*4iexl x a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line jo hxx +*ni(dol n*zh*e4ining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed 5py; i4 zda*g 2h4xgydncv4gc.a: -re at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwcz g a 25acyg-gy*4rn.i :;h4dp 4xvdeay between them?

  Three 3.0 mC charges are at the three yc g;azt*v(9o corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the centevog*y9 ( az;ctr of the square.

  Consider a square which is 1.0 m on a side. Charges are placed2n55ror 6yaoxl2wo/ k at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1ayn2l oo x k5o6r5r/2w); +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 mCf, q0hp0xcbx vjbcbx i 72(-a- when it is placed in a uniform electric field. What is the magnitude of this electric fibvbcx-7 (,xxi02j-p cq0ha fbeld?

  A particle with a charge of 4.0 mC has a mas,t, 2;mhb,bwoj03m (zrhhq,,ztut w gs 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 fijvkf midcyl.6a(+ g (ksxxq)9c8 :tf:eld of 6000 N/C pointingv tfjky6mxl+qdk:x 9g. cfs c:() 8(ia downward. 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. The balem2:yw .q 1ttf:f mm.rl is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of therf .tm:yt1 efw.m :q2m electric field?

  A metal sphere of radius 10 cm carries a charge of +2bth3b+yf t)en.6 vnm(.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfacnt3ye+vbf tmh.6 nb) (e?

  A metal sphere of radius 2.0 cm carries a chyj8gpo-/jzef 8n /,ddjd;ap9arge of 3.0 mC. What is the electric jgp/8 ;en/ o-dd8j fj,pyzda9field 6.0 cm from the center of the sphere?