State the law of conservation of ewj6 6b .ilc9yulectric charge.

  Is it possible for two negative charges to attract eac)oonrn e+ n rsrb5-h69i/2kcz h other?

  Is it possible for a positive and a negative charge to attraipk r2 2a2xj1mlnb o*;r*)hqm ct each other?

  A glass rod is rubbed with a piece of silk. During the process the gl(o-33ayd t5mmjj q. rdass rod acquirer3d- o dytm5.q(m3jajs a positive charge and the silk

  A proton carries a

  The model of the atom shows a2sim5 ayn;x u5b/in od+rh*r 1

  A neutral atom always hahx;5(u3pwkvwfj *g9p s

  An atom has more electu zg z htvb+;nu5u7o)d;u6jh8rons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referr0w+uq )nyo k.d6 mpf;bed to ;w)+u kp6mo.ny dq 0bfas

  Materials in which the electrons are bound very loorki,j)) oexe45 n+,1hi sek2pfx )rl asely to the nuclei and can move about freely within the material are referrenpoxa j2x4i+ie)k1lf, hre ) )r5es,kd to as

  A negatively charged rod is brought near one enq ):l9hvmnyil8;cg .c ywo:5 gd of an uncharged metal bar. The end of the metal bar farthest f5lg8 qvml:)y:y;g w .hn 9ocicrom the charged rod will be charged

  Sphere A carries a net positive charge, and sphere 5n(xuadm tcz5+-*,bx1ilfwn B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touch5nz m+ x-a inf*utw,l1db5 (xced with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positurmvm .+0,io.wwxmku(jozc6 : m)i1 8a1deodively?

  An originally neutral electroscope is briefly touched0ur +ic); *uuctt3vczbo6e 7(y7mm ki with a positively charged glass rod. The electroscopt(7 7ty3;uz cmvb k6uio+ m*0cc)r iuee

  An originally neutral electrowf e .gn,7s:qv dn,wlr0y5d:tscope is grounded briefly while a positively charged glass rod is held near it. Af 0.w: d g:vqe7fy rldnw5t,sn,ter the glass rod is removed, the electroscope

  A positive object todzn0:a +,tzfvec7 q0buches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but doesvcz 0, 07nqate+zbf d: not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table.b:perri n .wvfj** 7+c A neutral metallic ball rolls straight toward the object, but *c7jb:*rpnf .wre+vi 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 o7dd 7u:x t qceysl; 6i1k.ybv2f the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a di+67 ihg aaj/ojstance d. The first charge is larger in magnitude than jg j6a ho7i/a+the second charge.

  Sphere A carries a net ca+7nxdd7 -tvxharge and sphere B is neutral. They are placed near each other on an insulated table. Which stat-+d77x an tdxvement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chsh ,sq*it ldd)(w2a:o qvq2 +marges on both objects are doubled with no changeq2),qhq2si*w adt(: mds +v ol in separation, the force between them

  Two charges are separated by a distance dp,djmx. g67h-k vvg 2w and exert mutual attractive forces of F on each other. If the charges are - .6vxv2gwmd kg7h jp,separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eachlp3)4:. p9 i d9dp:jgkbjz cwh other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the s3j dkldgpipj hz)9. c::9pw4beparation 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 lsj +ks ep-l88stg85*rb9m j pdistance of 1.0 m. What happens to thel-sl95jrb8kp8jg*m tes8p +s magnitude 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.u ;u vixb6v5nfylk6-7onpuht 7o9 .)z What happens to the magnitude of the force on the first electron if a second electron is placed next to thoz6ufi -u5t6v) hv7.o npkly 9x7b;n ue proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to m jpk*w p bu0n/a)0r0pthe size of the force on the proton if the electron is moved 0.50 m closer to the p )wpb/ * m0n0uparpkj0roton?

  A point charge of +Q is placed at the center of a square. When a second dk (k/n -mst 5w/i9+o*6qv0q fg oedcxpoint 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 s/oev- xdwkgqc5/k0d o +nfq tm 9i6(*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 atoe73t zmibg.p ,-gt. o the centroid of an equilateral triangle. When a second charge of +Q it ,gb .m7e.3o piztg-os 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 of +Q placed at one of the other vertices?

  Which of the following is not a vectopx;t 9yr1 x/w a9ld)xpr?

  At twice the distance from a point charge, tqs/ 9h4o uoswd-ru c+eny:2y.he strength of the electric field

  Is it possible to have a zero electric field value between a negative anm0b dsr:*n9 vv0 5xkved positive charge9rnxd00k ev vm v:5*bs along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive chargezj* fg ntxz zlc;9b:71s along the line joining :; z tjzbln 9xzfg1*c7the two charges?

  Electric field lines near psitive5gtx 0c;8 kazy point charges

  The electric field s2m s-enlns, v (u.axt0usin; 7hown

  Can electric field lin49cw8m c92z3uu jzvr ces intersect in free space?

  A solid block of metal in electrost9 aftk u:(c/unbrp7 5dn 1gt*yatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field i pctby *fgt: 1 n5n9uudr(/7akn the block's interior.

  If a solid metal sphere and a hollow metal sphy 0o.grbf2hhnvr7ew;,vg :(pere of equal diameters are each giv7 g fpn;h2h0vvy o b(,r:.rgewen the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region whe-6*ndi-swa ow +o0 kr:o r;d43 vhbmwxre a uniform electric field is directed straight upward. What can be sw0o- o x4rdnw-: sm3;*6+ba ivrdwokhaid concerning the charge on the block's top surface?

  If a conductor is in elid3dq qxrt2 o5;e6kx+ectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic v5zk2yrvua o))*c q q.sphere that is grounded. As compared to the case w )vro z2.aqcyqk)5uv *ithout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static tu6b9 7z 5sxnzujjtt9h35jda3m 4; eh equilibrium.

State Gauss's law.

  The charge carried by one electdm ec o0 .2f3;5vgdqjfron 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 mC6 f4r/z*utqprw6y j8 tk;, whr kq/.qm. How many more protons than electrons4wkp*,yrzmqukq r/q t/;fh668w rjt . does this piece of plastic have?

  What is the charge on 1 kg of prohjk4(q7gkkto p-h- 0 d+j)hil5xz z8lnaqg;4tons?

  An atomic nucleus has aw n5eji +r h0(07iy2rrdik4yt 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 c0hptx 0*t+qub m, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between thex 0*b0up+qtthm?

  A 1.0-C charge is 15 m from a second charge,ohg /twbn eyw481yz7) and the force between them is 1.0 N. What is the magnitude of t h)wbzwtye/1yg874on he second charge?

  Two 1.0-C charges have a force between/w:6enf63 zpmt pli+ p them of 1.0 N. How far apart are they?

  The force between a r3 +.qv062i zqvsifbh/*k ybe1lrqd9 $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initial+74cmz .anne ug v,fr)ly 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 betw7zv m)u4 nf gar.,enc+een them?

  Three identical point charges of 2.0 mC are placed k ac(2nr:o,w4bze ql 6o0eeb b ,giv8)on the x-axis. The first charge is g,qerb ,)enbv4li:z60 kc2 aoeb8(o wat 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 which acts on the charge at the origin?

  Three point charges are h fn n hwwlw6)+v/gtq7:8gs2 kplaced 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 cm, and +4.0 mC at the 100 cm mark. What are the magnitude and direction of 2g7: +/)nlwwn68hsg htv wfkqthe electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.01sfe -y0aa bilq34e7l 0 mC at x = 1.00 m; Q2 = 3.00 mC at x4 se-e qbaialf17 y3l0 = 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 d .-(+ije9 ijr tvys9;4v,tzm ( cwtuocenter of a square, and a second point charge of -Q v(r tjm i9(;4j,y.+ e-dituwotczs v9 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-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 r 5y;cd,-qwuw = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net f-r wq5yc,duw ;orce 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-/kyji k5)aar8e h6xtmeh e( 1); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC ceaihetka mh(k6-jr)y5 8/x1eharge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral .jj) ew;nhqeqn 10b;striangle which measures 30 cm on a side. What is the magnitude of tb1 q0;e.)jwjn s ehnq;he electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At w4olgc, :qt* r7slrcr dzm/h4;hat point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic crhg/rz ;47lmc ,lso:dqr 4t*force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 6(xirrig /son)1b(rxl-ead*m. Where on the x-axis can a third charge be placed s)l-esx d rr/ i1a rin(gxo(*b6o the net force on it is zero?

  Charge +2q is placed at thex,yss4 w-5iopx qr/ *c origin and charge -q is placed at x = 2a. Where can a third pos, psxrx /i*45-cq wyositive charge +q be placed so that the force on it is zero?

  A copper penny has a ;yy3l )x;dbxt2)hmo1 4t l8mvt.vxcc 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(eb7 ugk/lc ihndj8:d : 0d zwr:yi)2g against the force of gravity by the attraction of a fixed proton some distance above gdznrd: )b7 yjw i8ek:l2d h:gicu(0/it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common poin2+v :-eyxyc xcltst +3t by nonconducting threads which are 30 cm long. Both are given identical charges, and thec+3xet vxy yst2l+- c: 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 thekgdnina9cpxa0m1w98 d 6,w408o ptonfgy1:w electric fieldpw8a:nm4 x8 0dftipwd16cowa gg9yn09 kno 1, at a distance of 1.0 m from the nucleus?

  What are the magnitude and dix*ah57y gu, bc.5tc 5r4zejkdrection of the electric field at a distance of 1.50 m gz jk 5uc,dx7 hte54yc*5.abrfrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a smtw*ras:9gsj f-t 9x-p all test charge. What is the magnitude of the electric field at the locatip9 9r-f -wgjttsxa*:son of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What mwj7uv 9 4crm8d*abvhi)3 x9p is the direction of the ec)j hxdw8*p3 9u9vbmm 7rva4 ilectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the fyb55t / pvzr6eorce experienced by a 1.0 nC charge placed at the location of the test ch56r 5/ezvpbtyarge?

  Two point charges each have a value of 3.0 C and are sepau 8ps7l2scwg5rated by a distance of 4.0 m. What is the electric field at a point midway between the two charg2g pc ws785usles?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.n/w tni 1+xoiiw1lb0 (0 mC charge is placed at the 50 cm mark. What is the electric x/bi w0iloni 11w( nt+field at the 30 cm mark?

  A 5.0-mC charge is placed at t j1o*+nw-1 gz.qzew nohe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point1*- qzo 1zwnw j+g.eon 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 at x = 0 and x 3tv g1xp jbl9;= 0.20 m. What is the magnitude of the electric field at the point midway between thbtgj px9;l 31vem?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 (0;zcmt wv +ubm. The last corner is occupied by a -3.0b;(0+t zuvwcm mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges ared*- e.bvj sbi/a;1 g..3bfr ycbxka(f placed at the corners of the square as follows: +4.0 mC a(b3rs1bae *;y.cf-jba/ .i.b kdv gxft (0, 0); +4.0 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+.olaqx-accr 1v9t f6 5.0 mC when it is placed in a uniform electric field-ccqaf x+r1. ot6lav9 . What is the magnitude of this electric field?

  A particle with a charge of(s 51rqdwqmun )(p oe6 4.0 mC 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 gh.7lorv:15e xb. kcri is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball1 ecrkxobhl:r .5 i7.v for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. Tho ;5mxzju))jo6 i 9 yqdfy,zuq):cts1e ball is placed inside a uniform electric fiel 69:j)us uy))dti cq;y,xf z15jq zomod, 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 q2uqaf5 11p(xe/cnia+2.0 mC. What is the magnitude of the electric fiela2n e( p/qq51i1ufca xd 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cmvqjl6odu6yn obs,h 2 ze -r4;(:olesv40t x7i carries a charge of 3.0 mC. What is the electric field 6.0 cm from th ,v; d0o42bo7ez:nli66s4ue-lrqv jyo x (thse center of the sphere?