State the law of consxus w.(mc tc)-ervation of electric charge.

  Is it possible for two negative bisup:sqsk/4vbxc9; z lh-,, charges to attract each other?

  Is it possible for a positive and a negativejkux ,;.jne24s;cm oe charge to attract each other?

  A glass rod is rubbed with a piece of si; p fii(kh+;i 7d4e*vqaxss* elk. During the process the glass rod acquires d +iqe es k7;xp f*i;(i4has*va positive charge and the silk

  A proton carries a

  The model of the atom shows a7sv/ 9n)-d(msa )kj ;uuwopac

  A neutral atom alwayy id * /8prw)j7fg02q syxh+mjs has

  An atom has more electrons than protons. The atomzwsm0 j;do/*sxp c-;x is

  Materials in which the electrons are bound very tightly to (pa b3*fwlgh+on17,qa, wyrt the nuclei are referredfwl*n +prat7 g,by wh( ao3,q1 to as

  Materials in which the electrons are bound very loosely ul,oal/eo eiy 257r ,qto the nuclei and can move about freely within the materiq oal,ue 2lo,y/eri 57al are referred to as

  A negatively charged rod is brought near one end of an uncharged metal mpelfk); 61xtfurml / p*t*y, bar. The * 1p/xrtm6y felkup)f t;* l,mend of the metal bar farthest from the charged rod will be charged

  Sphere A carries a neda7jsf/p3 f u3t positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly to as/73fdfju 3puched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscopqp/h0y ol)mzj tw.u)3xgd (gana c 4*0e positively?

  An originally neutral electroscope 3 go4d+nxx 5kwis briefly touched with a positively charged gla5okng dwx43x+ss rod. The electroscope

  An originally neutral electroscope is grounded briefly while dld t5k.mij7. a positively charged glass rod is held ne di.k5jldt.m 7ar it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electrohie-b l(* e skh:.ana:z)uga/scope, and the leaves separate. Then a negative object is brought near the electroscope, but does aa:sn/ e )ieb:lgk.ah(*- uhz not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatexcf4ex gf 4qgo5 wvf)nw0(x, v 9d05iid table. A neutral metallic ball rolls straight toward the object, but stops bwfqc g50fx9io,)g04f4 dv5xiw evnx( efore 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 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) l8+h+ qek nxa x/)jmywyk)l-nstant $k$, which appears in Coulomb's law?

  Two charged objects are separaqykc3m;); tvl ted by a distance d. The first charge is larger i )k;mvlcq3 ;ytn magnitude than the second charge.

  Sphere A carries a net charge and sphere B is x(f*suj7-i: hfla3pv8 +i-lptnsws 0 neutral. They are placed near each other on an insulated table. Which statement best de+ -i pf s38*a7xwpfn0ih svsl:tl-u j(scribes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chu kgm73 w+5 /spb0gtknarges on both objects are doubled wwpn 7kb0 gtus+/5m3gkith no change in separation, the force between them

  Two charges are separated by a distance d ac 5q shiwoqfw0m7 cqo0h41i tg7i,2m;nd exert mutual attractive forces of F on each other. If the charges are separatet mqg 240swqfm 1ow,ic ;o7h7q0i5 cihd 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 the ldt4mh6xo f6e wxgg 2+xc1:c2force between them if one charge is doubled, the other charge is tripxw+4 2otexxc1 dh2:cf 6lgm6gled, and the separation 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 happens to )i 4v9t:d8dx,my k:ssgse e0fthe mag eesvdm4 sf, :8g:d0ks)9ytxi nitude 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 distance of 1.0 m. What hgfayrwe2;8) y bc* zwy5jlw e ;qfo,38appens to the magnitude l wwe5*gyy2;q oy;)w3rez,c8f 8bjfa of the force 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 ez,. hsl3n : 6vpx:;9riw+xczdp 1pas1.0 m. What happens to the size of the force on the proton if th6 9wexv:zxiapzdr 3 p,:p sh;+c.nl1s e electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poicox-o1z y2o.z 5yyr/3 8zafws nt 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 the8f1a- w23z zy yyo .5rozx/ocs 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 plag 4.mf8 .bjb f6mw5q:,bnuhheced at the 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 force that acts on the center charge due to a third charg4u, .mhjenf6gq b b m.h8bw:f5e of +Q placed at one of the other vertices?

  Which of the following is not a vector o*yt(bf:kx4 z?

  At twice the distance from a point charge, the strength of the electre, z,/xfkcs qx a6h*v.ic field

  Is it possible to hav q9 pjoi1a4ch5jrd26ze a zero electric field value between a negative and positive charge along the line joining the two chargz2j146 hocapj 9d5r qies?

  Is it possible to have a zero electric field value between two p+leel2u p ds. negg9r+r5r (m;wf4.gmositive charges along the line joining the twof. srn(gmw4r 2g+ege.p9rd; 5le mu+l charges?

  Electric field lines near psyot;w23vk*5 pqd vyr1itive point charges

  The electric field showc o h( lgpn).q2p3qpl:n

  Can electric field l:1bek tak9;e yines intersect in free space?

  A solid block of metal in electrostatic equilibrium is pl(r l0 f0br-fcgaced in a uniform electric field. Give a statement concerning the electric field in trlbf0 rfcg -0(he block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diametersv ngkdu+bdd5 g0o1t (r8d-mi ( are each given the same charge, -((1odv dtd0m5bui8r d g+kgnthe electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table i98qs ;a80 1xo6uhtx-z o ztampn a region where a uniform electric field is directed straight upward. What can be said concerni x6zaqh8;t 9pamsoo01 xut8-zng the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neohp1 .+gbl 45h6gd+lhe;i s,l9o ytaf ar an electric charge

  A positive point charge is enclosed b /g.zzz*: x ueufi*rmkur;4g,8e,oyc yeq76in a hollow metallic sphere that is grounded. As compared to the case without the hollow spher,zz r 67, *b/yrg.zeuk* 4 g:xe8eioqu;cfmyue, the electric field at a point directly above the hollow sphere has

State three properties of3h h+0;nd)rz -hs rrsf conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron0 .pwyems8,dll) -u1r9h ysnc 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 chajag3 gp, .-xttd;ruo+rge of +2.00 mC. How many more protons than electrons does this piece of plastic ht-u g,xt3+rd.j ;pg oaave?

  What is the charge on 1 kg of pnyyr7 ovq9g cl*5.9qf op+us ,qz3-jorotons?

  An atomic nucleus has a charge of .dk ard,n:g1hler+ 0r$+40e$. 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 mCf,ct5 6a :lazs, respcas ,tl5:f6z aectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwd)zcwak f: i)c0b5jop d3-gl)een them is 1.0 N. What is the magnitude of the second )gkf0 ljobc:5ap)c) d3zd- wicharge?

  Two 1.0-C charges have a force between them of 1.0 Nqu3+g+ ka9j55 kps b tegx+sk*. How far apart are they?

  The force between a :zggt c +x ;ubd:;(ztj$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expe800u h ri b*0.owpph/5env qfprience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between them?v8p/hpo0fie5 wpb*qh 0nur .0

  Three identical point charges of 2.0 mC 8 of-vn4oylhjk4ip/nn()x u32b+jdoare 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 magnitude and direction of the electrostatic fojl4-yo/ vdh8(np+ k o) u2x4jio3 nbfnrce which acts on the charge at the origin?

  Three point charges are placed oysjvywv*i92w ,g5c 0 gn 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 wggy* svcjyiw5, v92 0the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the9y,n7o gl/kidb9 m h8b following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; b g ybo8,hl/nk99imd7Q3 = -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 ceetrbse )c4a42y r 9*hv0bj5 cznter of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic fo) bcr54e0js9zyb c a*24evtrhrce 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 the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.kayjpn- d8;qv)4 w6 ,wcr)fhe10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force o)qn8h ,6vp dcw;rw j4f -yk)ean 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); fh,u5/h c17ol r;r zk 6g,kessQ3 = 5.0 nC is at gchkr17r e,oz /lsfk;6 suh5,(0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placehl; g*ij 4d5 ll;rsp/tqx0rni 9qvs4/d at the vertices of an equilateral triangle which measur4ig0irdv/qhs ntlp4l/qr; x*lsj 9; 5es 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 mtq28s0mg8di v*-ied6d w6;q wqy4tj are 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 electrostatic force acting on it would be zero?6md88i0t4iwd *e;wjqg y6qv-qstd2m

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 42f* )wngtfsh7z l7*gl .0 m. Where on the x-axis can a third charge be placed so the nel2 wg)gznhflt 7f*7s *t force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at xph,,me0:y ak p = 2a. Where can a third positive charge +q be placed so that the force on it is zeroayk ,eh0 p,m:p?

  A copper penny has a mass of 6w 0q4 cpz *.;aqcob+ d.vtvvl3.0 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 by the attractio,o9ubz2/*qwl caw2o xn of a fixed proton some distance above it. How far above the electron is the pac *o /wqwbo 2zx2l,u9roton?

  Two 0.20-g metal spheres are hu 8.dl 1/kt+zte *ml:ratgz f4nng from a common point by nonconducting threads which are 30 cm long. Both are given i:nz tt/ftal1d*8 zlg .4rek+mdentical 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 1pkzms5:da0-r :+tazfv lc n3 the magnitude of the electric field at a distance of 1.0 m fa5zmf:cnsv1 p+0zd:a-3 r kltrom the nucleus?

  What are the magnitude and direction of the(bq/z d5/l/sm 0s0q+ugzi*vem 4jrla xfp i9 ) electric field at a distance of 1.50 m from a 50.0-nC chz*//0d l+9rmigx j5 u4sie0/qlspzqfvm( )ba arge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of*qvrp f (d*mg3em uv*7 the electric field qe g3 *vfv*(m*mup7 drat the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directiona qk4pyl3.pzz/:cy)c of the electricyl4 z zkqc /:)3ac.ypp field?

  A 5.0-C charge is 10 m from a smarjmn 76ebs (r b6gk dc)406liell test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at t0s)766r g 6dmbie le4knc (jbrhe location of the test charge?

  Two point charges each have a value of 3ccx/w 8nb6x +v.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between +cb6/ cxv 8wxnthe two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a am4zn0 sa f,u-meter stick and a -4.0 mC charge is placed at the 50 cm mark. maf0n ,zu4 a-sWhat is the electric field at the 30 cm mark?

  A 5.0-mC charge is plap 1ibx1gqj 16yced at the 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 theij 1 qgb1x1yp6 two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 anw wqkq yf0+jz6e )n:d8d x = 0.20 m. What is the magnitude of the electric fielyqfe q06:dwj8 z+k wn)d at the point midway between them?

  Three 3.0 mC charges are atzl4znns0bfu 5t-fs2 y. ):tyc the three 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 cente.4 u-zys)t yl :0c5tnsf2fnzb r of the square.

  Consider a square which is 1.0 m on a side. Charges are q4nor/ wvui;4placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC qv;iwr 4u4n/oat (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 center?

  A force of 10 N acts on a charge of 5.0 mC when it 2xg* o 76gvha5, qxp1 ymnxg.sis placed in a uniform electricg1pg7 26ng vomx5hsyxxq,* .a field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 by6nl -y+c5ll w3zy o k,ryp*04vp *esmC 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 g is placed in an electrs04p c(dsl )sfic field of 6000 N/C pointing dl( psds0)4scfownward. 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 ball i,ql pp:;)o nu9fxqg*(yhw :o os placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction ofh, o9)og:nwlp q(f:;y *x uopq the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What iojxc53;6 376wjjc 0ufqix *uo- unr xcs the magnitude of the electri3f;c7xnxi uu - c3w jcjxjo60r65oq *uc field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 - mi0umaeit;qrhrz,i j*)oti n ;)u1 *cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the)mhnm*uuoe q* 0t;rai z it)j-1,ir;i sphere?