State the law of conser hfrf /u +1r)rj:lu)l0 k-iczjvation of electric charge.

  Is it possible for two negative cuq 3 r qv.s 6mgee2m.xifp6(*eharges to attract each other?

  Is it possible for a+4fd:6exmc mv positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the,jx w aal7qnmh;c()e/ glass rod acquires a positive charge and te/(7;qc x)mawal, hnjhe silk

  A proton carries a

  The model of the atom sho0:re r xx7x5rgws a

  A neutral atom always b 9x9j m:my/wxms aq;5has

  An atom has more electrons than zqk4(te4.q ziprotons. The atom is

  Materials in which the electrons are bound very tightle z93 l bm (,w1p9/rydcetb3dty to the nuclei are referred to m3edr9 d3 z(cl/ 9be1 wtp,btyas

  Materials in which the electrons are bound very loosely to the nucleiqt35eu(i jinhansvl/m(l5 (6 and can move about freely within tj ql5n (3ul5ishtnv /ea((6mihe material are referred to as

  A negatively charged rod is bj/o v ve(drh8ty*( ed77(n qfz4l8aa jrought near one end of an uncharged metal bar. The end of the metal bar farthest from the 8oal*eqrd 7af z47vy(j(jdth8 nv(e/ charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutraiyr 2 kt;jqr/(l. They are placed near each other on an insulated table. Sphere B is briefly touched with a j2iyqkr(;/ trwire that is grounded. Which statement is correct?

  How can a negatively charged roeba7 mcu5 bm fp22umu9 n* 1t8yz61g4,tb rlckd charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positiv 4p*v mbavt9y4iwtxixk6+h5+q8 siu /ely charged glass rod. The elecik5b+v /sw um ip qhx*ia8t6+t4v9yx4troscope

  An originally neutral electroscope is grounded 6nsk nu+cw8o;fn1lag0ubnty q4r ,+ 7briefly while a positively charged glass rod is held near it. co n; u6kn+ ,0u4 grnsft1ba w8+nqly7After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the)th ..k :9wkftb)ytee leaves separate. Then a negative object is brought near the elec. tw)fe .ytkkte9: )bhtroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placbgv v n)j x9tjdoz;jj60d64l,ed 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 fil6v gdoj;x bn6, )t jz40vjjd9rst 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 Coulomv,/z mhadto3 d :n4 2rv8wfn0jb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charvdd ())sype48) qvatu ge is larger in ma (tapeqd d)8uv4))y svgnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are place;(ass0cz9dorl; 6 si/n sqew. d near each other on an insulated table. Which statemenw q(6els0szdn9 s;aor;.i c/st best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges onl+v v1.pkiy6 6b0v u(ywwsy7s both objectsyl1w.7ub+( sk vpi66 yw vsv0y are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractivcn6 urh*itq- cx7 p*7ce forces of F on each other. If the charges are separa-n x chiqu7 c*6t*7prcted by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force 8* ys:qdhp6i i z( 9vscf2qt6cF. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation di*:z pi6ytcq2cqs6fvi(8 hs d 9stance 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 a8c4t o3q*yr mjd : q;wiob;;us distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first eti3 4wy8;:;dr* bqoq;m cosjulectron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to98mv3gm nu9tu the magnitude of the force on the first 3vgu9 tu8m9nm electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What h:d: pzg4njk0es)3*cb is 2p ,xdsiy 4jappens to the size of the force on the proton if the electron is moved 0.50 m closer to tby2g xc djnk,e::p04 ) sip3dj* sz4ishe proton?

  A point charge of +Q is placed at the center of a squa*e6s 6 i w,oq/wq9p7 vxwtxl7rre. 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. Whvqp x9w ltwe*6sw/rx7 ,o7q6 iat 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 equib57q/oohc i 9: ij4jev 2kb)jdlateral 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 magniicoq kj2/bj de 95oi74:jv h)btude 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 i pd 13vzcjmjc -:3iha6s not a vector?

  At twice the distance from a point c+nw fc.5fv6.6ai7*nis *frw:dbnkivharge, the strength of the electric field

  Is it possible to have a zero electrice6-2kvbwk b qm3t0l*v field value between a negative and positive chaev*q 2wb0t3 lv m6kk-brge along the line joining the two charges?

  Is it possible to have a vox sgndmf; 6*fj,a( 9zero electric field value between two positive charges along the line joining the two charg,6fm n9daj(o*fv;s gxes?

  Electric field lines near p +f 8orjw*4cemzlg1;ht5 gg(vsitive point charges

  The electric field shown a)h8mr8g3r. s3n jarn

  Can electric field lines intersect in free sx kfrlds /.lb4 o:47copace?

  A solid block of metal in electrostat2rkwrzo-v0n: r : pv0lic equilibrium is placed in a uniform electric field. Give a 00: lnv-r:rk zpvr 2wostatement concerning the electric field in the block's interior.

  If a solid metal sphere and kr(; km 7r 065rsw qfk/,ewemqa hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the suwf6k7mrks ;qmqke (,e/5w0 rr rface is

  A cubic block of aluminum rests on a wooden table in a region sg6q+ a lrcgxfn:pt+-.;h/e j45yiut where a uniform electric field is directed strairtge +yhgc5 jt .-:u pfi6sxl+n /4;aqght upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric charg/y.j ,rrg 95:je*ecu on+iyvo e

  A positive point charge is enclose6ars+guje19y ./c xyw8lif0 rd in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field atg1ex6./0lris+cyr w fa8y 9ju a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.k p x)+c i)h2ywd/j v/m;lp-zt

State Gauss's law.

  The charge carried by one elecn8 9gq4y 3z: ljzoy)-lti+lcdtron 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 char:kco 9f/pen yl,*4 vioge of +2.00 mC. How many more protons than eleci kvono4: cefp*9 yl/,trons does this piece of plastic have?

  What is the charge on 1 kg of pro2ck j+9ko:y pt0l).ne ojhgj)tons?

  An atomic nucleus has a charge0bd zxz pyg q10d(4:hy 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,vv pa;xy-9c / )hs+gsr respectively. What is the magnitude of the elvc/;+sp x va ry-gsh)9ectric force between them?

  A 1.0-C charge is 15 m from a second charge, and the fols j.m0*/8oknfe 5 bmrrce between them is 1.0 N. What is ths0f b m5mre/*lojk n.8e magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart a1df9 axaplv49pm 9b: are they?

  The force between a o +abvrkiu:y+. t ,d7x$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they a+ yu0ct m+yip-l0ak1ere moved to a new separation of 8.0 cm, what is the e1eu0+l 0p+ckyy ita-m lectric force between them?

  Three identical point charges of 2.0 mC are)g ol le(6fnho uc (d h)4 jm/:niltdi5t.ry+1 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 direction6+l./oilhc1)d(tdgy tn)5u n(h4ile j o:rfm of the electrostatic force which acts on the charge at the origin?

  Three point charges are place2)2c:wc7fq wr(mqn mujb6t4 i. mi9 ltd 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 cum w2nim rm.q:b7)iqttfwc j294l6 (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 htsvh, r j;w (wy-kjih((pi39positions: 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 is the magnitude of the for v shph,(jiy9 wwti(jh3k(r-;ce on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a i )u;osahw,1fsquare, and a second point charge of -Q is placed at the uphau)w,;1 fsi oper-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 = -1.0 nyiv+3z,u .s f83sa,n;q5i 2 vlapc uceC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC cha siy3;cnsf p ,vc8aq5i.3,v2u +azuelrge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3(hdw*v*czmjk r d*:e z2y6y4x = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC ch *v jx6y 4zkz**m(ewrcdd2y: harge?

  Three identical charges of 3.0 mC are placed amgdsdcxsh- w v4j3 bf;p .5m/:t the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude d /sm3b5 :ps4cx.w;gd jf-mvhof the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q a m *juo8gkaj 9/:fx8stnd +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a c fgsj:ot/kx *9uaj8m8 harge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.h/zguydryg j/m b7m*, 1inj*5 0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the1i/gg7 dj5uybm j r*yz*h m/n, net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where w0k* r get1olp g;o,n:can a third po eg:rw 0og*okn1pl t,;sitive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totaao exh)t6 x8)fl 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 vu1 ek n;r4vdy(qppk +4sx1i3 a fixed proton so k;14r(kxe1qiu ppyv n3d+vs4me distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres)cs;12ui2pdcepu 3q3gb iy hrr55k 1w are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsh bwu2gpkc isy)eq1d5 irp532u;3r 1cion 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 uw+lc7h.4f06zeme 9cw.et8 y ck nb2 mis the magnitude of the electric field aen .c0cl.w8 c9fybeu zmwe4+tm7kh2 6t a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at o )0glmynd5eo vwgec0x3m4,9a distance of 1.50 m f,omo34mge9 n0)lgy de5x 0 vcwrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test c jy.14paeot z7/ epfw+harge. What is the magnitude of the electric field ato/ eaztpw f4y17pje+. the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is i 4wvl*m 0tu1i tv k2q7r;ssg-the direction of the electric lwk;g2v *it0uim s-1v74 qstrfield?

  A 5.0-C charge is 10 m vvwh)w f./ kuri8y*5dfrom a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placedyu v *k/w5i8vr.f)hw d at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancvt)lmvpy-mnsc6nu071 08igc e of 4.0 m. What is the electric field at a point midway between the two ch1m-s nc mu0pv l7gcn086yti)varges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.hb cp oed8bc852o.l gpk 34-3krrzb9e0 mC charge is plapdpc 3ebrkb43cgle o5brh.o82 89kz-ced at the 50 cm mark. 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 chasf-(of- 5uh y8cl)qoqrge is placed at the 50 cm mark. At what point on a line joininc f5y -o)sqohq(luf8 -g 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 = 0.20 m. Whcg-rf 64dz ,; )5sw9j/ 8drdnwn3onqe+ndeshat is the magnitude of the electric field at the point midway benojd,nsn 946d dens/r-wrz dh ;cqf)8e5+ w3gtween them?

  Three 3.0 mC charges are at the three corners oe8kt64 dw76a jvpx t0keaa( -y3xe.lsf a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge (6 lpty-467d8a30kwsvjexa ee .xta k. Find the electric field at the center of the square.

  Consider a square which i xba8*:z17x gt8p5ac6 u9,w.zzgmtdy s4wkrbs 1.0 m on a side. Charges are placed at the corners of the square as follows: +4c:gzktm xrtd7wa 8.6bgza b,s1p 9xu 48*yw5z.0 mC at (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 5.0 mC when it is placed in a uniform elecx: ndci26.wcmmjifp :) c* :rrtric xi:.d cm: rciwpmjf:nr *2c)6field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass ofsx 9bx/s *jj ok4jf/su5(odp 5 $5.0 \times 10^{-3} \; kg$. 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 electric field of 60xzlu0gmc) /, 9pld7s s00 N/C pointing downward. What charpz)xl/0d u,s m csg9l7ge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carriyi9f, qv2 d+nles a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the fod9n lfi,+2y qvrce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnitcye .bq9pt+7q (m6x9utib1y zude of the electric field 5.0 cm from the spheremut9iq16x t.(p yez9+7 qbby c's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mv( tmabxh ( j d:a:l7;k8:zf(che wmh7C. What is the electric f7 dahjeh ( w( bkhtxzc :lm:8m:af7(;vield 6.0 cm from the center of the sphere?