State the law of conservation of electric chargej x7r5-pm+x tf f.l5mqnpdq-l5f7n ;k .

  Is it possible for two negfwk5y0(mv/kg nyyg512t t r i0ative charges to attract each other?

  Is it possible for a positive and a negative charge to attract eac/ cero-q;h9zoq.q ff- h other?

  A glass rod is rubbed with a piece of silk. Duri0zr +hkirq8:ibj)z, uu0ci01.b ipgqng the process the glass rod acquires a positive charge and the si 0)j:rigb z zhcur1bpk uiq0q,i.+08ilk

  A proton carries a

  The model of the atom 7cq f+5 nz w fxhaei6:sk5)eq:shows a

  A neutral atom alwaysh rbg12wh7*h+z8la ee has

  An atom has more electrons than protons. kuek38+b uywgxqe(5 tmqz-4, The atom is

  Materials in which the electrons are bound vv)1s:)5 gwoqv hq:k.jrgpdf kmil4:7ery tightly to the nuclei are referred thwg)qk v: 7 1i)klmfgjp:or.:vs4q5d o as

  Materials in which the electrons are bound very lj acwq5k0;1a yoosely to the nuclei and can move about freely within the material are referred jqy1; 0k acw5ato as

  A negatively charged rod is brought near one end of an unc2aeua v qb/k8+harged metal bar. The end of the metal bar farthest from the charged rod will ea k+qbvu82/ abe charged

  Sphere A carries a net jt8il) 3ws (wvhl h;y+positive charge, and sphere B is neutral. They are placed near each other on an insulatjthl)w;s3+w h 8ivl y(ed table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargm2z 9ika3 c qec: kqf)m/g,l7ged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively che23s2x n5iox.4i zg3y)d oun narged glass rod. The eds)2 3u nnx.g5ii2n3ox4oe zylectroscope

  An originally neutral electroscope is grounded briefly while aoaunjhf /m zdb d ;2 n0hltp)(ym4i-nq; u5*+n positively charged glass rod is hey;tnz ua-(j)infnuh;nldob hp/ q*+ 24 m50m dld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutralf e i35m4ay)un electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens 5afymuen i3)4to the leaves?

  A large negatively chslpj57n .5jm warged object is placed on an insulated table. A neutral metallic ball rolls straightp.wjj5 m 5nl7s 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 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 thbcr26o v sjl7,e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is kb6 a f2kil/hva5d7 ;8dyp;talarger in magnitude than the second chark i;aflk6 /dva827 d;a5 ptybhge.

  Sphere A carries a net charge and sphere B is neutrca7xvg- t -nlr 3caz/i5fs 7u:al. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between thi5-afvl c3:77xuan gsr t/z c-em?

  Two charged objects attract each other with a certain force.ruo: / kxgt+1. d*efhb If the charges on both objects are doubled with no change in separation,k*tr /bexd.: gho+1 uf the force between them

  Two charges are separatycjck:jpz6e 1tm 3( k8xj)3-hkej i0med by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distanch8xj e3pjc m(k- )my1kk3:i 6c0ezjtje of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happm(:al+dpwqxu l ,(2qic 7 imozf;k+y,ens to the force between them if one charge is d+w( mcoqlxpiz:2l a,fuim7qk; +y (,doubled, the other charge is tripled, 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 q9y nlf )y02sito the magnitude ysfq0 2nli)y9 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: ,oxr62zm.e 2uype nz m. What happens to the magnitude of the force on the first electron if a sec 6.zz2ree u2n,xoym: pond electron is placed next to the proton?

  An electron and a proton are separated by a distance wapz1; gq6 :zoof 1.0 m. What happens to the size of the force on the proton if the electron is:qw6 p;ozag z1 moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the centervvyxj))j- 6u: v xi wn.knw)w0bd) n7z 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 magnitude of the net electrostatic force acting on the posit)x0xik.6 )) vjwu-b7w)wvvnnjzn d:y ive charge at the center of the square?

  A point charge of +Q j;akf,j;n: xlb/o sc+ is placed at the centroid of an equilateral triangle. When a second charge of +Q is placjxa l on/;,+:f k;sbjced 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?

  Which of the following is not a vec2fk ai/6 xuj)npcd0rz.p h. kf:z )wx+tor?

  At twice the distance from a point charge, ccbs: puj*j/s2; 3 f.cofma-mthe strength of the electric field

  Is it possible to have a zero electric fi/ppi95iz4cval zy4j( eld value between a negative and positive charge along thivlj( 5p44c yza/zip9 e line joining the two charges?

  Is it possible to have a zrosh.yc4 x)k 7ero electric field value between two positive charges along the line joining the two chaksh 4 ).7ocxryrges?

  Electric field lines near psitive por+ opl 6fk5 3iu7 oq8a5lpt/uqint charges

  The electric field shown 4)lk:lz 0jim hvyzs57 gq8,yc

  Can electric field lines intersec 6ea8) o2kfuv/ etaalc v,;a4pt in free space?

  A solid block of metal in electrootai9wt.ox.sta rc3 /qj: r 6)static equilibrium is placed in a uniform electric field. toca:9rtw.xa.sq /o3j irt6 )Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each 8l:9il + i 8 nqr3qjeu(gd-unfgiven the same charge, the electric fi uiugq8i l8dljn 3(+:-rn9q efeld (E) midway between the center and the surface is

  A cubic block of aluminum rests on a r6tsg(kz,*s a6uz d;u wooden table in a region where a uniform electric field is directed straight upward. What can be s(a ,d66kzgut;su*s r zaid concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electrid5/ibr*m r bf7c charge

  A positive point charge is enclosed in a hollow metallick -j onhc8z-m.s+09 ap:c oehs sphere that is grounded. As compared to the case withou0+k-cm:hh9oe.cjao sn8p-s z t the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of condn7 r8bcccu x++f1jzu3uctors in static equilibrium.

State Gauss's law.

  The charge carried by one electrone0 /f.o he:;tvs,fcu j(gc1 vn 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 protons:2tps4 m6iuu s than elec m:6 uptsi42sutrons does this piece of plastic have?

  What is the charge ohfc*o.2bdufwr :sg o0/+xh3n n 1 kg of protons?

  An atomic nucleus hasl;cwb 6okx-e4 a 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 -4.0 mC, rp5ugz /kxrdy2olr l/.3rwz 9.)ufu y .espectively. What is the magnitude of the elecod.lz9uu3/kr2 ywu lr)5/fzr g.. x pytric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them zm 8g5c7 :+flesnm4ja,:;h oam dz5 pqis 1.0 N. What is the magnitude of the f :8a5z paoem54zgs l n:d7;m+qcj,h msecond charge?

  Two 1.0-C charges have a force between them of 1.0 ma w d isl4b.+vvnc+*8d (j9viN. How far apart are they?

  The force between a )cao 5mp1-4lo3uc hkz$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ifmqac,83 yk.b nitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force . aq3f,mbkc8y between them?

  Three identical point charges o .s*94 j ibfwtp;e,,tlx6kav yi s9rf:f 2.0 mC are 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 electros;e*9aw y4t,6k,irvpistjf:b. 9 sxlf tatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2 bc2ds;tbd)t :v.+bu x.0 mC is placed at the t x.2+bd:v) bcs;udbtorigin, -2.0 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 mC at x =b413krgfqr(b n j s, ;m7nr:rw 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 o1:qrbg7nwrb sr3j knmf4,(;rn the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a sex0hqxp s-+jh f(1ch cdvaxzj)s 3,un so;4 :x;cond 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 the lower-lefvh0u fchx3 :;q;1c(x- zo,jh pxsdsnx)+ s4a jt corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC ih3:lf. hgd/.ed 9hr8drjvl 9qs at (0, 0). What is the :flhhevrj 8d9 l9 dr3 ghq./.dmagnitude 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 aj0jvk h() kd, w py9vngcjzu+eas+:; /t (0, 0). What is the direction of the net forcvn+/sy p j0ke,j+k) av(9;cj hwd: uzge on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices pg+ ).)uvq9 5l srn6zhloi, dbof 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 charges,qu . +)6vh lngsdroi9)pb5zl ?

  Consider point charges of +Q and +4Q, which are separatk/r -p pu9ole-ed by 3.0 m. At what point, on a line between the two charges, would it be possible to place rl p-k/9up-oe 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 hoenje*o3n vmu9. oz9 -;ih /sa +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net ne99 ohooi- z*m /eujn;hv3.sforce on it is zero?

  Charge +2q is placed at the u5it)fb5z(, qhpu9iw*ywd,hh 5 *s luorigin and charge -q is placed at x = 2a. Where can a third positive charge +q bedu)z hl*q,wfu ,5i9 *y whph5i(5 bsut placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A ti- ffvkjr5w gn:j 2m4rzlu160otal 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 attraction of o;yknxi f q, s3(;eik;a fixed proton some distance above it. nf3 ;; kxqy;e(k isoi, How far above the electron is the proton?

  Two 0.20-g metal spheres areoo (b.v 6vru)t;at pj/ hung from a common point by nonconducting threads which are 30 cm l;jvru )o.tv/( po6b atong. 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 +40ep k/,phrib) 7w. What is the magnitude of the electric field at a distance of 1.0 m from the nucleushp),k /ib p7wr?

  What are the magnitude and direction of the electric fieldzick sn7z0z h842smmi8rk5 a9 at a distance of 1.50 m from a 554h728z 9 8k cma zzrks0misin0.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. Whaww15ibfwg hvi:j/m15 t is the magnitude of the electric field a:vwgw551bjm/wh1 fi i t the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dirhqhwg* .q,b.w ection of the electric fielbq.g,h qhw w.*d?

  A 5.0-C charge is 10 m from a small test char6tqq gv:k,,fe ge. What is the magnitude of the force experief t:g,,qek 6qvnced 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 distauumjs7iw :u/rr 0l3r+ nce of 4.0 m. What is the electric field at a point midway :j+suuurrlr /w37m i0between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sdw di . j1lm.uqv18i6s h(vn8rtick and a -4.0 mC charge is placed at the vw d.ilmji6n81hvs1dr .8u(q50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at t5.if-gepo . -k 7j*difebu *zjhe 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 charges is the electric fiel ff. ibd- e5gie*okp-*zjju7.d zero?

  Two point charges of +3.0 mC and -7.0 mC are placed atj g82 z7rdmww3ri3(m s x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poin3gjwdmirz2 3wrm(8 7 st midway between them?

  Three 3.0 mC charges are at the three corners of a cki * wkdz:r:4beteg7gg/pzww(0;g) square of side 0.50 m. The last corner is occupied by a -3.0 dk7ewkg:w*z/ 0ert ;ggzic p(: b )4gwmC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are pahb r2b:/ t4)ous6qz jlaced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); )a t h2/rsz:bobjq 46u +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*1nl6q3u/mcepo y s:z charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electric f *n3osc6lpzm/ye1u : qield?

  A particle with a charge of 4.0 mC has aui3heitd 9wzm*:(5ir 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 acd+p0 otihqtitf 2si*a07(,vn electric field of 6000 N/C pointing downward. What 0tiof7v+hcq2 p(0 sti iat,*dcharge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.lv99rv6 e ajo300 nC. The ball is placed inside a uniform electric field, and is suspended against the 9v arj96 e3lvoforce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 sdhu6ynh pdtyk 05hll6,1r)3 cm carries a charge of +2.0 mC. What is the magnitudlh)dkl3 u6ny yp hh 65rst01,de of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrieowvt 2 -tyw65.cv/8 3svdobbz s a charge of 3.0 mC. What is the electric field 6.0 cm fromo63cv5tb2ovv/ d byw sz.w-t 8 the center of the sphere?