State the law of conservation of electric chax x8 zusl/)n oal(*;gtrge.

  Is it possible for two negative charges to attra0,j 4pjxd2m h zb p5x(co,las9ct each other?

  Is it possible for a positive and a negative chargq1+0wgb*2dwzc9 wqb ;pidi:ue to attract each other?

  A glass rod is rubbed with a pi wffjjx-2-szv vk-9y6 ece of silk. During the process the glass rod acquires a positive charge and the silwzx6-v 9fj fk-s jvy2-k

  A proton carries a

  The model of the atom sho q fwkav8f2kabm l 0.zk55*qt2ws a

  A neutral atom alway6qrjx 6+ m.ft. .huppns has

  An atom has more electrons than protons 9al0wuxxl01 n7upe r*. The atom is

  Materials in which the electrons byaj;fw ++3r/bbmrb: are bound very tightly to the nuclei are referred to as3bmb y;:rb+w+a/fj br

  Materials in which the electrons are bound very looxvr m a17-svb1sely to the nuclei and can move about fre xas171mbrv -vely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. t7*(oek gjn+8 yv;trdThe end of the metal bar farthest from the charged rod will be 8tkd *eyv+7rntgj;( o charged

  Sphere A carries a net positive charge, and sphere B is , (o7f9pgya5b -npj gineutral. They are placed near each other on an in 9fo (ip7pangy5g,jb -sulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod cp62 acd3:vk,gy xdiu:harge an electroscope positively?

  An originally neutral electroscope is brie-qr s-wq 4uqnit. v:1+ l,cayofly touched with a positively charged glass iq s,rqtlyau-4oc-qv1n:+. wrod. The electroscope

  An originally neutra ,a2 c/y3lf u1mwrpzmsc70;t gl electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is re myr/su3 c,0f tpm;zlgca127wmoved, the electroscope

  A positive object touches a neutral eleca; uvm6fzsna 0uugwm./(6z;etroscope, and the leaves separate. Then a negative object is brought near g/a mneu60va (.s6zfuz wu;; mthe electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated ta o ;j-qvx8tio/ble. 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 dxoi8vtq o- /j;oes 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 co.im3 m pr0nze(1yb*renstant $k$, which appears in Coulomb's law?

  Two charged objects ar au -,ygt+u744 taxqmve separated by a distance d. The first charge is larger in magnitude than 7,t gu4-q4 autayvmx+the second charge.

  Sphere A carries a net charge and3 er zzjo1c0j. sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes thz0e 1j 3jo.czre electrostatic force between them?

  Two charged objects attract each other with a certain force. If the c zss4x)bo94h76+fnp0jv kcumharges on both objects are doubled with no change in separation, the force between th44ov 7f 0sunzxh j9c)6mbspk+em

  Two charges are separated by a distance d and exert mutual tq0t0a ek3l 6uyxegc 5g6-n0mattractive forces of F on each 560e0la u6km ce-nty g3qxg 0tother. 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 f2gp78+uhd z;i : npscgorce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the dzi+;pc8 : nups7ghg2separation 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, .y.egtx30 cai d.) upve-ul03 qnuts distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first vt0e.dyq33 u..pat -egxcs nu0i, lu) electron?

  An electron and a proton are separated by a distance opnbyl1jj4 88 +oo lz0, j 8occxtc,l2gf 1.0 m. What happens to the magnitude of the yclo2o0lj 1t 8 ,poczj, +jl8bn48cgxforce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1p*idaf jxc6epux, mgk45 f1 cs7:1bm j(ax*s8 .0 m. What happens to thxp1(uxa:c5m6sx pf,c8gk 4bd7f ais**e jmj 1e size of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of dxs7,rve x-nn ,owu4,y8- pvla square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic for7vlvn- ox,4,w x8,-dn serpyu ce 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 triangle. Whe/6zqs 9(kymw xn 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 k/yz( 6wx q9smof +Q placed at one of the other vertices?

  Which of the following is not aqun :j 2/xdfg9/(y ffa41ccp o vector?

  At twice the distance from av- 2j.mygr+y0 f c1u 4alvkjl3;,robofd 44ih point charge, the strength of the electric field

  Is it possible to have a zero electric field value betwey n)u: dt9upvha,;0ia-j;bq s en a negative and positive charge along the line joining tn psuv;uh; 9yiba dj0q,-): tahe two charges?

  Is it possible to have a zero electric fgz. u5s5;;p afeua y/cield value between two positive charges along the lc5 z sau. py5fe/;;gauine joining the two charges?

  Electric field lines nen jcu, 57*wjilar psitive point charges

  The electric field shown2tfo3vd7 ulu8

  Can electric field lines intersect in freequ ug;by irx 9-+90 e8l,ismhn space?

  A solid block of metal in electrostatic equilibrium is placed in a unicl vq:dtiw;q kbvk3i, afa 71z* q1r60form electr ack,r3 it q:b*vq1wdz1k 0iqf67alv;ic field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metalgvy6k*u b 2yl3 eyo9a/ sphere of equal diameters are each given the same charge, the electric field (E) midway2bvyy 93l*y6u/k g aoe between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform/dhlj4k9hkfyt gt 0*) 0:si:mz;wnzz h +z f/r electric field is directed straight upward. What can be said concerning the g/jfsit 0zm :nwy :) zhzhhktfrk/+4lz9* 0;dcharge on the block's top surface?

  If a conductor is in electrostatic equilibrium tcw wvhq,p-65t6a vo, near an electric charge

  A positive point charg/npap5(k lq4 be is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow spherp4l/(np bqka5e, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrv oc)hw+p-5mye ,yb;9 k y4 jofnq,)-tas,ria ium.

State Gauss's law.

  The charge carried by one ele5 3t+d tvg :uw,sqri(uctron 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 ha-jsvel o6 - mrj,*(9ff-epjtus a net charge of +2.00 mC. How many more protons than electrons does thisl(,t6-jvo9 up m se-*-ffje rj piece of plastic have?

  What is the charge on 1 kg of protons? ;lcpupk. bbu87/1p.i,x hzvz6wgn h 8

  An atomic nucleus has a chy/zo8zqud8tvsq4;ch6qr -( ; 6lgw mm9)otwbarge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separo4wko- r4p+wlated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. Whal-r4p+k4oo ww t is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and tb0qp7 e q pkznuu1udl990qw88 6lgru 8he force between them is 1.0 N. What is the magnitudeu8uw0z 6eu91q07lb 8n qkgdpq9p8rlu of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they?jd,z w(7zxr-y

  The force between a (x* dolm *39whz h:ujb$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ex9dqu 7b1fle h-perience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is 79q-fhde u1lb the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Tw-b(tx h0/-lin9fu*me qs+qr he 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 magnitude and direction of the electrostatic force whu /*m if-l b-tx(sw0q9rnq+ ehich acts on the charge at the origin?

  Three point charges are placed on t+pakm8wv ul +scqt ;)*he 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.t +)u 8+mqva s;wcpl*k0 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 lot ltxrh38y )9lcated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x9tth r8l3)yx l = 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 ,xb)v**z.qve v 5j ew 0n +ziwoi6n7ltthe 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 charge +,n7x* l zei6 tinz)5e*0qvbw jvow. vof -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (8mc pw;nr)i) ww8*nd d0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magiwcrpmd8w); n8 d )*nwnitude 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 is fe5zm62p 8xi 9pue14en 5uc:lkgs2rl at (0, 0). What is the di8 ecge42z5rk lx:i 6lmse pnf 59u12uprection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vert(yorl zcj4 exh9 x./z8ices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts cx l(z e4/r9jzx8oh.y on any one of the charges?

  Consider point charges of +Q khiir1dj(q2 gy 2ct u7:dx-7f and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a chat2(dx d yk -i2riq17 uf7:ghcjrge 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 az j8jpl5i;+vsskg 7 d6ul 1b4tt x = 4.0 m. Where on the x-axis can lpjsl;id 4u5j s+ 18tgzvb7k6a 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 0:sw6hyf8nq lgc6b;y = 2a. Where can a third positive charge +q be pywngh8 06y6:sb; fqcl laced so that the force on it is zero?

  A copper penny has a ;f s/mg 9*e7f6e*fttgmjy cb)mass of 3.0 g. A 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 force of gravity bf82;ahx -6b/rv - uyx upyqc+vy the attraction of a fixed proto /8--v6 2r;abuv+hpcxyuy xqfn some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common pointk r72-6wsr6s vewdic f(qyw:, by nonconducting threads which are 30 sw -r6 ,yris(7e6wqk wdcf:2vcm long. 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 of +40e. What is the magnitude of the electric fr )joi-r+ +trw*x iwn//n*) wrrt+j x-irow+iield at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at ae 1ffmau6uxocymwy;r52 i, 62l o - oyv.**qig distance of 1.50 m from a xy5;f. uuoc2gem*qlaw-f vir661 *o m2oi yy,50.0-nC charge?

  A 5.0-C charge is 10 m from a small test d4z sc9o6kv r 6 rhay+nav(mk; 5oz, .mv0g2ftcharge. What is the magnitude of the electric field at the locatiokd62yo ar5 nmro;amzk f+9v h.v,0g (6csv4ztn of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of 4myj6;jg2b rp the elej4jmrbp2gy 6;ctric field?

  A 5.0-C charge is 10 m from a s6 -a 8dxd1disl+(ivqo mall test charge. What is the magnitude of the force experienceddiq6 o8x1-+d(avsil d 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 sepxmuj/r2l8 y-iw.b 6 vkarated by a distance of 4.0 m. What is the electric fielwiju my.r2lx/k- 8 b6vd at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a :gtoht;025)yse8-v o f3vg i6m ueqflmeter stick and a -4.0 mC charge is placed at the 50 cm 5qh il ys of;gve e20gfuo3)vtm-86t: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 stickf;u,gjigzcx6 m.ob (+ and a -4.0 mC charge is placed at the 50 cm mark. At whbz; +(mjo fucxg.6,igat 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 vt22m9ye 1 eliw72 cohat x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway t27volc2ywe2i9me 1 hbetween them?

  Three 3.0 mC chargesdg hghon t0 2k8y/3(vkcb6fs5 are at the three corners of a square of side 0.50 m. The last corner is occupied by a -cn o03tg8(6 s2kbk ygv/5dhfh3.0 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 p7woq-+ p z.czm )eez6nlaced 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, 7.zm nz+qw 6po-)zece 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 mC when nv 1mcx9m *0+yoeeiy6 it is placed in a uniform electric field. What is the magnitude omvy0* c+e y91xo6 mnief this electric field?

  A particle with a charge of 4.0 mC has a mask ntss)7tblk5 21p 9qis 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 1r s47mesnr*1endw+: ly s2bqN/C pointing downwarnssr1eq1rnb dmew*7 2l ys :+4d. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 gj;b(ru aa,* egu*f) hj(* mdyv6h e.fw carries a charge of -2.00 nC. The ball is placed inside a uniform e h(g h) ja(6ue* rfyb ;.uejva*f*w,mdlectric field, and is suspended against 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 mv- tosfdmxs- x ,/(im3agnitude of thef(-xs3im dvx/tmo-,s electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a ev wnt:w6n:l 9charge of 3.0 mC. What is the electric field 6.0 wvwnen:tl 96:cm from the center of the sphere?