State the law of conservation of electr 8p9z:rqsmz jj:gx,a:ic charge.

  Is it possible for two neg dlg jk)-zt4,lative charges to attract each other?

  Is it possible for a positipu06 r1/2yus -ufcidn +e9g kkve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of sipbsfl/1 1 xz.a(g d2gulk. During the process the glass rod acquires a positive charge and the silkbfglz.s1(ug /1ap2dx

  A proton carries a

  The model of the atom showsh6 *mbzstym0;7j ce zjf6;qk; a

  A neutral atom always haswmwzvhp5izk 9h b*;/d/y /a/ d

  An atom has more electrons than prot(eox+r gy3t (sons. The atom is

  Materials in which the electrons are bound very tightgjt kw3z/ce/ /xsyp9;ly to the nuclei are referred to asjk spt3x9//e/cyzg;w

  Materials in which t xq*xxx nya*,/we.iob n/a7* yhe electrons are bound very loosely to the nuclei and can move about freely way ei* qxx o,ny/a/*xnb7.*x within the material are referred to as

  A negatively charged rod is brought near one amkij :nrj a*/((jx m/ hb4crs9 ntj0/end of an uncharged metal bar. The end of the metal bar farthessrkn:/a i4 /0hjxb/(t9m ( ajjcj n*mrt from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutrb)+x9ni: x)zj3f hhaj al. They are placed near each other on an i:xbhhz)a +93 f jijn)xnsulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively j;of2 09x6o:mr jtiyv u.+urzk gkq2) charged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touchn,kk9af 9 u 4pt9yv7cled with a positively charged glass rod. 4n v79ku9p 9c k,flatyThe electroscope

  An originally neutral electrosc t;()gsuc0s ylope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, th;0)tgsus ( clye electroscope

  A positive object touches a nep )ub1zw3gse8g3ly b g4o,v6eutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. s,pb gzw6eg ) ul14ogv83 yeb3What happens to the leaves?

  A large negatively cvoa*1 ev47sf 7)rso gyharged object is placed on an insulated 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 negative objecafyg 1* 774erov )vsost. 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 th9qcs,7c:w uuge Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distawmlm(fnaoh.f da83*o n)heqi v *.a .;nce d. The first charge is larger in magnihav m3.nhao nl* .ao . 8m*(fq;w)difetude than the second charge.

  Sphere A carries a net charge and spheevy( hx,to093tlu e .(oxogi d7k:uj 3re B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force lji d(,0ye7ott33xg:ou.veu (9 x k hobetween them?

  Two charged objects attract each other withxtb, .,f 8 7 ;g9ap h3gywonzxh0mwvh5 a certain force. If the charges on both objects are doubled witahh;3g fzm05th,vxp7 oxgw., ybn89w h no change in separation, the force between them

  Two charges are separated by a distance rxt0 j18rej w+d and exert mutual attractive forces of F on each other.wejrt+8jr01x 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 force F. What happens to ts i6,njb e3s-rhe force between them if one charge is doubled, the other charge is tripled, and the separation dis6-nj b3e,is rstance 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 happenkml0q 2atur t.47hyr7s to the magnitude of the force on the7q 0m2kt 4r.utryh7l a proton if a second electron is placed next to the first electron?

  An electron and a proton are separatedtkdq0;8 whcsq6ayp .9cbv 56d by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electros5cdh 80kytd6c9;6 bq wpa v.qn is placed next to the proton?

  An electron and a proton are sepa2 .-e7iszw wjlrated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is mos2 j7eiw.wzl-ved 0.50 m closer to the proton?

  A point charge of +Qrrnglmzp;/ a.8 ( xb6i is placed at the center 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 positb/zm86;ari rg (lnpx. ive 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. Welhw3b2t 0x 8zsd-sq6hen a second charge of +Q is placed at one of the triangl8wxe3zbh2 dst ql-0s6e'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 ved4386*ez rcn bads jj1yrzt(;ti7 .zo ctor?

  At twice the distance from a point charge, thm 6y m0hf 7+kl6isf7rvg ebc,09fa /lye strength of the electric field

  Is it possible to have a zero electric field v,4j 7 0p ekm3ul cktn)dift.7dalue between a negative and positive charge along the linkj0ul7.74indep,fdttkm3 c ) e joining the two charges?

  Is it possible to have a zero electric field value between two positive charges8nmy-:b th5j o along the line joining the two charg yh bj8:mn5-otes?

  Electric field lines neaqvw jqq8:3l3x r psitive point charges

  The electric field sh zxrplzu72j g23r9h6aown

  Can electric field lines intersect in free spxq0.0is b42)bvj/8dfu aog qsace?

  A solid block of metal in electros*d)b* 8owajl;qrig zbp8;xm( tatic equilibrium is placed in a uniform electric field. Give a statement concerning the electricdr8;b8ml)z*jwq;o (pi b xag * field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters boy,kx-t,mk5 tbc0h*cg62 yo v)w ,fsare each given the same charge, the electric field (E) midway between the cky5 t,o2cxtwvy0 k ,-c )moh 6sbg,bf*enter and the surface is

  A cubic block of aluminum rests on a wooden :xas9ui*i k v6 cfu, +b+gwbe7table in a region where a uniform electric field is directed straight upward. What can be said concernu e +fiv9b,*c+6a: siwx7ugkb ing the charge on the block's top surface?

  If a conductor is in electrostatic equili.r fjz+4z0ki dc(w5x zbrium near an electric charge

  A positive point charge is enclosed in a hollow meta61+;cs:an aw/,c)fqgu ;rpac0kqsh s d/.s whllic sphere that is grounded. As compared to the case without the hollow sphere, the elect /asp s+hkrg q c ,auqs:nw 1/;c;)06.ashfcwdric field at a point directly above the hollow sphere has

State three properties of conductors in sm n kr*.3 wa0edbz(q8w.n5iygtatic equilibrium.

State Gauss's law.

  The charge carried by one electtpjr uhdb; *7q-.m uxblm19u.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 net charge of +2.00 mC. How many more protons than5hr 1+deoalmh 4 drp3) electronso5)ermdrh +lha 41pd 3 does this piece of plastic have?

  What is the charge on 1 kg of proh zjmd3+o.bs8 tons?

  An atomic nucleus has a charge o6 9om,q*jqjeqm pptzf7 rk2/2 f $+40e$. 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 pf+hl1ozk *q8(0p bsaand -4.0 mC, respectively. h lfppb(z8q 10*ksa+o 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 between them is 1.0 Nk)v0vv p6w mc84;,uuarhg7g cv kw 2u4. What is the magnitude of the second charge?4c, 7w0gmk8vu6v cu2vkuh)ag4vr p ;w

  Two 1.0-C charges have a force between them of 1.0 N. Hn )mtj.p ipw ay/(a/mlj8azb.0n9:s qow far apart are they?

  The force between a k6tdwg q()) e* jmwu/q$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, e,dnrc a9 /so-dxperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between d/ , n9sr-caodthem?

  Three identical point charges of 2.0 mC are placed on the x-axis. Thefk lcwff/8y8 ; 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 magnitudef;fcf 8yl k8/w and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed.:lsu p/ciij5:c f6n l1f 5xxv on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cfjf.vnx56scpi:c/ i1xu 5: llm, 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 = 22 kju1m1)sm2 /xx2iq lybh;sh.00 mC at x = 1.00 m; Q;mu2yj1q21l hsb)x2hk /x is m2 = 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 charge?

  A point charge of +Q is placed at the center of a square, and a second poi)6n fx;qk3kw f v/pj*hnt charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the x;)fn3jq f/ 6 wkv*phkpositive 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, 0.1cs s7)v4a1dbcfmx;gif e)u ) /0 m); Q3 = 5.0 nC is at (0, 0). What is the mg1/uics) vm)7e acf;bs xf)4dagnitude 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 /n+ zb4fjm s1knC is at (0, 0). What is tm/ 1+ nkzs4jbfhe direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral dt o6l h*k5rs6zb 3oo.y(6n cfxh90aitriangle which measures 30 cm on a side. What is the magnitude of the electrostatic l6f(tio6hxy5.0or6hbod9 *n as 3kzc force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separahn(jmgymo6 .- ted by 3.0 m. At what point, on a line between the two charges, would it be possible to place ag .jy nmo(-6mh charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and x1 fkz1(ndj g/a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third ch/1f(dx j knz1garge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and chaiw 5mxnhs81.w rge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the i5wm.1h w8snx force on it is zero?

  A copper penny has a mass of 3.0 g. A t0i:y ;z ao3 2uh4 sdku7qpfp6gotal 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 a fibce2 85uhd e:qh;kws2w; m1scxed proton some distance above it. How far above the electron is the e 2skh1c8cmbew u:2w; sqhd;5proton?

  Two 0.20-g metal spheres are hung from a common poizc-p1rd )8g wro)5ns6ryckg2 +)d det nt by nonconducting threads which are 30 cm long. Both are given identicalsd td pzg- )rn8cwd)1re6 y+52c)kgor 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 cy 3i+hkgbgb3yp/50 w of the electric field at a distance of 5ky gby0+gp/c3 bih3w1.0 m from the nucleus?

  What are the magnitude and direction of the electric field atp3a)sad zo+*rs epd8/ a distance of 1.50 m from a 50.0-nC cha 8z/peaor+*pd3ad)ss rge?

  A 5.0-C charge is 10 m from a small test c+x 5 cf8qx6 eori:dy:qharge. What is the magnitude of the electric field at the location of the test cf:qyq8xoir :x d 6+5echarge?

  A 5.0-C charge is 10 m frbijobs.25cva; r 0j1rom a small test charge. What is the direction of the electric fiel jb1 0; .ravibo25jcsrd?

  A 5.0-C charge is 10 m from a small test chargez fb ua0:(7ycr. What is the magnitude of the force experienced by a 1.0 nC charge placed at cf (uz:rb70ya the location of the test charge?

  Two point charges each have a val;n7kts9q u- zbue of 3.0 C and are separated by a distance of 4.0 m. Whaks q;z7-ut b9nt is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick anc2fhokh-0 zdt5h w)o 1d a -4.0 mC charge is placed at the 50 cm mark. z ckhoo 1tw-d02hf )5h 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 stick and a -4.0 mC ch 1gbvq hh /4z lp20o0b0mox/lkarge is placed at the 50 cm mark. At what point on a line joinin /ml hb/lb0q 2kph1voz0go 4x0g the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at xu/-cwv6 r/ rex = 0 and x = 0.20 m. What is the magnitude of the electric field ate u-rrvw /6xc/ the point midway between them?

  Three 3.0 mC charges2 bkak mjelm.lli+ i2l2 hhiw i2h95:( are at 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 center of the squ2l+5l2alwmj2 k:kh ih2i .iib mel 9(hare.

  Consider a square which is 1.0 m on a side. Charges are placedw seqa b*j 6d +0hi8a ie4o,,qz48zmyp 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 + iqj*0e 6h4 z8idwqmzbaya 8,,ospe4 (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 is plac e/n*;gmzp1k .o) bl-hsda bn-ed in a uniform electric field. What is thol pk1g/ b-ehmz)s -nb;d*n. ae magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass3 iip5pv9skvvzz1 6 (u 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 electag t)v3jmdi1 5ric field of 6000 N/C pointing downward. Whadm)j5 v3ta1 git charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 tpq9y-batxke327h 8 eg carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the ma-ht9tqxyep37b8 a ek2 gnitude and direction of the electric field?

  A metal sphere of radius 10 cmq*qi ,crklp e+dw.3 k. carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphe*,le+c3. kk pw.rqd qire's surface?

  A metal sphere of radius 2.0 cm carries o8d/zz,/xk+ p.bxj swa charge of 3.0 mC. What is the electric field 6.0 cm from the center ofdswpx zxob/ 8/ j+.z,k the sphere?