State the law of conservation of9 f+ajx99 g6xmopim8d electric charge.

  Is it possible for two negative charges to u7l)d r,-a* 2jarmnlm attract each other?

  Is it possible for a posjeajd yi :fm-06.xipwr ix5(*itive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of si nul3i(urie)h6-:ok vlk. During the process the glass rod acquires a positive k- lnue3)i: iv6(h ruocharge and the silk

  A proton carries a

  The model of the atom shows c. xzz-c: n,)m0vaiaulk)- tq a

  A neutral atom alwaydl0 bsq.b nv8as25 r5 .rlu1eus has

  An atom has more electro/jxfb:j5* / ,xwyb y8ts)nlbl ns than protons. The atom is

  Materials in which the elect, *.vnifno+ x5ctpuu 0rons are bound very tightly to the nuclei are referrex+nfopc0*v 5 ,un.iu td to as

  Materials in which the electrons j1vcp3f.lj67bs fn8y2-0 e-rcjvmluare bound very loosely to the nuclei and can move about freely withjvf vl.bsely0-urjp7m3c2- 8 nc6f 1j in the material are referred to as

  A negatively charged rod is brou4)lyskrn r3v8 ght near one end of an uncharged metal bar. The end of the metal bar farthest from the cv yrr8kln)43sharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral.kmu+k(: oyd+f +yg8y;w(ugx j They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which stjf+ y(kud;o+y:+gk (umxwgy 8atement is correct?

  How can a negatively chargedyb35 lw c3 jo-5ahpu)x rod charge an electroscope positively?

  An originally neutral electrosn 7mwida)-nov0n 1dy/ f28t g okxs3i3cope is briefly touched with a positively charged glass rod. ng) ida2owt0 -fo/mvn i1yd37 3 snk8xThe electroscope

  An originally neutral electroscope is grounded briefly while a xyprqh38hi 1x:5 mixdn j 9+d6:1ibzmpositively charged glass rod is held near zirh5:x8qdbm61j3 xixn y 9i +md:1phit. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the lea- i.i)q ghphix+a +ud,ves separate. Then a negative object is brought near the electroscope, but does not touch it. What x.+ui g+i)ph ,ahi-qdhappens to the leaves?

  A large negatively charged object is pshudex.( ehf0za p2).laced on an insulated table. A neutral metallic.pz(.h0 e fxahdesu)2 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 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 ofiitl7skgbh4*u ml*ws)s3 dk-xp n, + + the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a prgb-)ld, *a1iu *wrmnen* (a distance d. The first charge is larger in magnitude than the secondrl mupain1) ** abwe(n*grd-, charge.

  Sphere A carries a net charge and spza*in/6 3nfojwv ht5.here B is neutral. They are placed near each other on an insulated table. Which statement w *3j/5n.v6izfnho ta best describes the electrostatic force between them?

  Two charged objects attract each other with a )k d s* vxjx(,e5tj-oicertain force. If the charges on both objects are doubled with no change in sed j*( )sij5x-ekxtv, oparation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces ox wr-*ta3 wmd2f F on each other. If the charges are separatedm 2twrwa-3d *x by a distance of d/3, what are the new mutual forces?

  Two charged objects at33p xm:z6upu7hi(l2j2 kp bo ctract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their center( 6oxhupil3mz32 bujk:2pp c7s is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a dista1 g qgco ubxn8 5d:3:a*lgn)wxnce of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed nex:d3a) qg1n5oxx*bg wcg n8l:ut to the first electron?

  An electron and a proton are separated n h7.yylbw,e twoj,9v d4)b4iby a distance of 1.0 m. What happens to .,ljb4hd v,b ) yeww49yito7nthe magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separatedgo9du* 7q 2b2ze ox(cw 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 closer to the (d7u2qo*e2owcx9bgz proton?

  A point charge of +Q is placed 22u ms 598kq/qxcgwfuat 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 electrostak5 wu2m/qgu8cf2q9sxtic 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 trz,js6 v9o2e+l8f06awxier b he centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle'iovfrr6+j0e sb2l ,e9 za6w8xs 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 ven4tp(5 kvtcd6a 2 b.d4uaza: fctor?

  At twice the distance from a point chargeg5 60sl fn; ,8uqlvspe, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and positi z85ep.hm3cdt .ml n,cm)hpp3ve charge along the line joining t . cm 5n8z33pcmhd,e.)t hpplmhe two charges?

  Is it possible to have a zero electric field value between 4)1wz -k3 jy mw:vr;qxlvh0 cttwo positive charges along thq j 1v4-tvzhmwlcx:);rwy0 3ke line joining the two charges?

  Electric field lines near ps0vs;w)n :vr.dgq6 t 3f7ptyhp itive point charges

  The electric field shownn a tnk+(fczzx2)g0i.g1nfft d g:s1:

  Can electric field lines :ea);tr9mxb;l vusl- intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elecle+b)a )xu 7oj)(q. is n:ayectric field. Give a statei)q) .bsa: 7 nx)oy(jce+ uaelment concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphepz*,hr g z):yore of equal diameters are each given the same charge, the electriz,*o) pr:hygzc field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table y-5h v07:bz8sb y pkuoin a region where a uniform electric field is directed straight upward. What can p5ub8yhy z -sv0kbo:7 be said concerning the charge on the block's top surface?

  If a conductor is in elu3l8icz t;k2- qbz8 akectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groun,7ceuwg grh8eq k 5m fi;i:kzl)0(*pkded. As compared to the case without the hollow sphere, the electr e0rugk w*i(m i)kk,qc:pglf75h; ze8ic field at a point directly above the hollow sphere has

State three properties of conductors in static equilibh2+l9p 10iagwsy0xxzsf 2 oh9 rium.

State Gauss's law.

  The charge carried by one electron i*0hp 1 hkl cct2v,m(fes $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net t c3;om n2jwc0charge of +2.00 mC. How many more protons than electrons does this piece o;c23nwotj m0c f plastic have?

  What is the charge on 1 kg of protonhhay;)wh80as uu v vepvgc; d,ni5..)s?

  An atomic nucleus has a charge t;kie i1(sbhxm40 ao, 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 cjgmxz *. m n)0c(bxf92.0 and -4.0 mC, respectively. What is the mf*bmcnx9x)cz. 0mj(g agnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second chap/ c:cornnus53s5y6 :/ swd omrge, and the force between them is 1.0 N. What is the magnitude of the second charge?s6nu3s/ c srnpo 5:wy/o dc:m5

  Two 1.0-C charges have a force bxd d((4r eyt.hetween them of 1.0 N. How far apart are they?

  The force between a p6jnjxbtk2rs 6-x)e. $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm 5 (;jgc qudgtvu3l q8-apart, experience a 1.0-N force. If they are moved to a new separv8dt -;5glj g cquq(u3ation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are plac x,p jd 9gq.kh8,wyb0xed 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 mj.9pdy0, xgb ,8xkwhq agnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC s/20sm ,grv*z ;gmqbqis 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 the magnitude and direction of the electrostatsgg;2r q*,mm0bsq zv /ic force which acts on the charge at the origin?

  Three point charges are located at the foly7dv eft y,rx y.1nc4byff599lowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What iy xfvry.deyy,9fcb 79 nf54t 1s 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 pbk9g (e8 g73mc- ybxiroint charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts ony7 c8m 9egig-( 3xbrbk 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, 0.1 v7f5daum;.;)bze oi z0 m); Q3 = 5.0 nC is at (0, 0). b7eudvozz a);i;5f. m What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); (rzy kd8+ q 2;gw9nndvQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chvnkg 8;ny9(q zr+wd2darge?

  Three identical charges oid3)1paq mdd /na(b y5f 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts dqbdimp3/ad a( 5yn)1on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 mpg/a (9/ub;zxcxwj *bmk gw ,:. At what point, on a line betw/ upwx(*/c,9;bw ggxkab:m zj een the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at thyew1 :qmcg8-p, w fp6zox nmb.5m2 jt+e origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third chatmm2g . -q bewymn1 6ox8j,p+cfpw5:zrge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Whep;mkgik 37nd1 x-*0r 6,gxwmdwm; vrzre can a third positive charge +q be placed so that the forig rvm1,w*nkw76;m m-d dx;pgzxr k30ce on it is zero?

  A copper penny has a mass of 3.0 g. A total ,3es(*uh-q 1way g5avh6 zozd 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 pyx/+ dt0,mivoc2n8 kn.yj4a1 z6 xkffixed proton some distance above it. How far xy 4m 2caozjf86y/+1,d 0t.xvk nki pnabove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by exye56xo o 1le .j(jv, v mzg3s8xs4e*nonconducting threads which are 30 cm loe1l,oe*es( xx.6e vsm5z84ygovjx j 3ng. 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 electricxxrwk1m55u(s field at a distance of 1.0 m from 5(5skx x1mr wuthe nucleus?

  What are the magnitude and direction of the electric field ad; fij +trlm2w:h9 mm.g)wif:u(ihe9t a distance of 1.50;t( gihf. e2m +iwmujml:w id9r9h)f : m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge.edwh-li p-,:fq*-c e w What is the magnitude of the elect p:h--wd,fq l cwi-*eeric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Whaqne*s h8+xyh52 jjo px c40ts5t is the direction of the electric fieldh4jht2 j+sxxpoys qc n*550 8e?

  A 5.0-C charge is 10 m from a small test charge. What is the o53;;uwyclq mmagnitude of the force experienced by a 1.0 nC charge placed at the location of the3u ol;cm;y qw5 test charge?

  Two point charges each have a value of 3.0 C and are p29 tuja5msqy kd(d5pr0g9)0tws l-y separated by a distance of 4.0 m. What u(s9kr dpp gsy-j0)90ld5y wt5qa2 mtis the electric field at a point midway between the two charges?

  A 5.0-mC charge is plczy 1ms n1w3)baced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mc1m 3yw)sz1 nbark. 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 o,gq;m/wyv n;7oimuh2o .-qjy dh0 5h a -4.0 mC charge is placed at the 50 cm mark. At what poin dqm/2 yq;u.h7-go;ivhy5 mhno j0o,wt on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -ia 1yjoa7b;vb(z 85j,z* g: ltgif(kc 7.0 mC are placed at x = 0 and x = 0.20 m. Whav(,aycj*tb k1l5b8 oj(z;iiaz :f7 ggt is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of simgfw)qiprz( 2; rw: no(4 -x*3vek uwyde 0.50 m. The last cow :np-e) rfx3k2 i*vo4rw(q;m(gwzuy rner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Cuy5ktpl11lvi v2.v8*k /v r avharges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0vair vltk ul1285y kv1*/p v.v mC at (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 is placed iz*6b/o, gbdrtn a uniform electric field. What is the*b,/dz6r gb to magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of4 , b7;t : pg*qb-nefyjqhd)ko $5.0 \times 10^{-3} \; kg$. 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 elez y lw2l3,af2kctric field of 6000 N/C pointing downward. What charge must be placed on the bay ll,f z223kwall for it to be suspended?

  A foam ball of mass 0.150 g carries 0tu1x -u pp rj*nsy( 02nixi1qa charge of -2.00 nC. The ball is placed inside a uniform electric 0sr -n1xp1(*2ti j0q iunuypxfield, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius h 9hxt.mdk,pcv z5+ .t10 cm carries a charge of +2.0 mC. What is the magnitude of the 9.h.kv htpm x+z d5ct,electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 c.vt ewn7,z9m0rnniaud bo /hh;3/,o nm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of 7azd,nn/wh nrho93 t.o/,;ubviemn0 the sphere?