State the law of conservation of electric chargell-)yt 0pj2 jeh.tc q3.

  Is it possible for two e77pqn(nx ;(wd* beh- hyt.m i66i zhmnegative charges to attract each other?

  Is it possible for a positive and a negative cha :o1,oibpwo6w rge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glassv vc;x4(k+) p-o; d3kirqnnt7wud zy0 rod acquir;p- icv3wn)ykud orz4 vntdk+7x0( ;qes a positive charge and the silk

  A proton carries a

  The model of the atom sdb3ov 4a+yai6 hows a

  A neutral atom always uuws1 jdm 1sxa+-,1px)uaf j5has

  An atom has more elects9 92zunm ji0srons than protons. The atom is

  Materials in which the electrons are bound very tightly to the txkzsu(.9 o.2,bqsrorjn+ zi37b; xanuclei are referred u2 b a;ki9qx+( st sz7,.rxjro ob.3znto as

  Materials in which the eldmxd mbi yqj2- a-20d k.l;yh)ectrons are bound very loosely to the nuclei and can move about freely within th22my h xijk;-baqdml. )dd y0-e material are referred to as

  A negatively charged cx7ynl9 lo,k*c 1g4t wrod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the 1cxk4g7 l,w n9y*cotlcharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is nbj2k d g)06gv euv5--gzk2avyeutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is cor- bjg-6v2z)e 2dkv5y ggv ua0krect?

  How can a negatively chil16(.vhxr l -ja gxdfa0wor ;)npk4 ;arged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively ch xt* dx :r5pz20)z bkj8jeyan-arged glass rod. e yz:5xrj)2 j *a-bzdxtn80p k The electroscope

  An originally neutral electroscope is grounded briefly while a positively chargehdu.pas18 )x9 etm(f zd glass rod is held near it. After the glass rod is removed, the electroscop1 zsape8 )(9x .hfmudte

  A positive object touches a neutral electroscope, and t2e(j v (befxa (atyigz ;b 7lbd0gz10(he leaves separate. Then a negative object is brought near tg(l(z(aavede j;0y7bgf(0 bz1 bt xi2he electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed h 0hg3u7x25 1nqwddve 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 object. At no time does either ball touch the negative ovdq 3g0h2nx 7 5dwehu1bject. What is the final charge on each ball?

  Charge is

  What are the units of the w1q(: -fy ci4dijjtlz v ;hy(tw+2r s/Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger: wkrlfj14ch/ tw/(ab in magnitude than th4chw (lr a1:/j/wb tkfe second charge.

  Sphere A carries a net charge 2 g.j2f7qlzoavpxi/8 za:2vd/ :jos kand sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force betweeig.kvqzfsx8/z o 2lp7a2j2adv j/:o:n them?

  Two charged objects attract each other with a certain force. If the charg 9e+ldm0o* ltskc 8d2ues on both objects ar eso2 clk* u90d8mldt+e doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mu5fto73q l a5vstual attractive forces of F on each other. If the charges are sfq5v 7 5t3asoleparated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. Wha5 aun1nbe) cw- pg 0dabu+5q3ht happens to the force bet0nuqgbac u1+5- heawnd)3p b5ween them if one charge is 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 separate-dvs7e60mev i d by a 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 electroe0mvde6s- i7v n?

  An electron and a proton are separated b2d/1s wr4m*v/hs *pfny(bvajy a distance of 1.0 m. What happens to the magnitude of ts b*mvs w*(n jyhr2vf4p1/a/dhe force on the first 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 happens ll:; g mg ;9ifpflscc*8qays:et7:q2 to the size of the force on the 2;*:l elmp qtgi 8 7:cqal :fgsf;csy9proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a u9-ckbyx9 l/( 6vdtlusecond 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 6xl-(buly9 9/kudtv c 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 triangle2f5sv oskv v7.4qs gm(. When a second charge of +Q is placed at (v4s fmkvss75 vgoq.2 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*qsa h1 .p 6 )shjmwhwgqe;r0p3o0i :c a vector?

  At twice the distance from a point charge, the strength of the electric fiel5g g4shp9h(cvr44v zk d

  Is it possible to have a zero electric field value between a negative and positi4w me;99ypg b ptk ;t3(8jps 1vcr,exive charge k43p9 x ,8 wr y 1pct9jtgb(;;iepvmsealong the line joining the two charges?

  Is it possible to have a zero electric field value betj.v b.8 ,dr4sbp8tpa(pdscm) ween two positive charges along the line join4 t.8pbpb )c(rp a,vj.sddm8 sing the two charges?

  Electric field lines near psitive poinzt s/7mj 43*vxxdc: qlt charges

  The electric field shokr bq:j32 (b r7tvsd9own

  Can electric field lines v-7ncs1f8z *rigp*yqcfp)1 g intersect in free space?

  A solid block of metal in electrostatic ec9f7tf - *fkhrquilibrium is placed in a uniform electric field. Give a statement chfkff r* t9-c7oncerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diamet.+kchht;trmpr:,q c* ers are each given the same charge, the electri.hcrqt c*p ;,: rk+htmc field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a woode sy,tj9a8yuww o*0a+gz8, k0rp5bb7xe d) doan table in a region where a uniform electric field is directed straight upward. What can be said)a8ag0*k bws od8jyo7 90 , +pbxwat eyd,ru5z concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chy/1bvl /qj cuz cxk9ygx307w5arge

  A positive point charge is enclosed in a hollow metallxfj81154g * 8 y3jxryi nahjaxic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow spheixjfjjy rx 885a1xah41*gn3y re has

State three properties ofw 7(st:xc (ph3:ni egs conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is g e4cl9r+mm n-5rn4zt $e = -1.6 \times 10^{-19} \; C$. 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 md/k qw*( l7yzbany more protons than electrons does this k q *l(7wbd/yzpiece of plastic have?

  What is the charge on 1 kghwa4v1c:c*m/n on h5k of protons?

  An atomic nucleus has a charasob6kmi 7 .6lge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sepae *8ge8;uugz vrated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between thegev*88gu e zu;m?

  A 1.0-C charge is 15 m from a second charge, and the0ywfr/zx0.ode s,wv m*4xb ;h2 e -dre force between them is 1.0 N. What is the mebwx,sv0r. fd/e*zw d o -h402rxm; yeagnitude of the second charge?

  Two 1.0-C charges have a force between e+v 5tpq4d( fathem of 1.0 N. How far apart are they?

  The force between a s1up ,u 3ft n:4ut5ae8s bju+ki+.arl$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience f-9 o1g2 9bxf8dhep.mm*r(.dh kxo vja 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force befmo.* . oxd99ghkj( v f-1brp8m xh2detween them?

  Three identical point charges of 2.0 mC:s0g x n+wya4z are placed on the x-axis. The first charge is at ts yz:0x+ 4ngwahe 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 placed on the x-axis. A charge of +2.0 mC is placed at e9/6l5au bspk 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 pe sluk59b/a6of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC atp d un:;-oapw :xvo6k9 x = 1.00 m; Q2 n:;p o:ua xd kop-6w9v= 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 point chab9 s,ys u2kgwjl hn95/v:yk :bui,r5srge 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 b/,5vb9: hlurk2 wsjyk 59s:yunsi, gis 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, 0.10 m); Q3 = 5.0 nC ih62 0zid vvud-s at (0, 0). udvzd -62i hv0 What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); .;wm e :9 fq-sapuse;bQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0,b-wfps ;;m9a q:eu.es 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are pls1wdve8 5 n1ejaced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one ows11e 8jv5dn ef the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. kzp88 ehp,.gb At what point, on a line between the two charges, would it be possible to place a charge of -Q such that thep 8b. ehp8z,gk electrostatic force acting on it would be zero?

  A +3.0-C charge is at theohl61v 2 arnbj2tkr)u5 -/ yq0x9txxc origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis c0yn9 a- 2u/ tko52tr) 6 lq1jxhxxbrvcan a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is plaahqj bf( 8rq(*ced at x = 2a. Where can a third positive charge +q be placed so that the force on it is jr8ahqq( (b f*zero?

  A copper penny has a maswt1j2x 24i sgns 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 against the force of gravqg 8ro 6 bu+jqua/b;,kity by the attraction of a fixed proton some distance above it. How far above the electruu+6rqbgaj, 8qb; /koon is the proton?

  Two 0.20-g metal spheres are hung from a common pointk1n7jsk y)4si by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until ss7y )nk1k4jithe 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 thmqq 1j( wa f/m6c3ub(fe electric field at a distance of 1.0 m frm /b3c(( wfam6ufqq1jom the nucleus?

  What are the magnitude and direction of the electric f.)h ssq(jt 2r2emzvq) ield at a distance of 1.50 m from a qe)r2 smq.v(2z) sthj50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the mo:*td3b,zy pfagnitude of the electric field at the location of the test charge?d3o*f z b:typ,

  A 5.0-C charge is 10 m fromr1 08j7 hf77crs5mp p37akz *oeojax.scdt 4q a small test charge. What is the direction of the electric fi0 oxf8ej5z7 srpdq 7 m to* cha317s4crajpk7.eld?

  A 5.0-C charge is 10 m from a small test charge. What is the magt9x0u5 hl nxhe+nd9r :nitude of the force experienced by a 1.0 nC charge placed at the locatio9e5+ xtudhrxn 9l 0nh:n of the test charge?

  Two point charges each 29prd(rwd q6h n,0lekj85ih u have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway betww 68de9rrqhdk (j ,5pih2nu0 leen the two charges?

  A 5.0-mC charge is plac9n w m(mr7e79(iw6hhb9zy nq t7yn xf*ed at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at th(xzymnw9f7(hnwt9m6 hn7 q i*y9 e7bre 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 mjl(t)f(q:ii( ny6 p72yf myq gb sp24heter stick and a -4.0 mC charge is placed at the 50 cm y2j6p4y: 7lnhfmy tb i(qsgfip(q ()2mark. At what point 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 = 0. 7 o, 4glchb sncl.1:2hfjew,r20 m. What is the magnitude of the electric field at the pc7l1h4fe.h nb jr :g, ,lcswo2oint midway between them?

  Three 3.0 mC charges are at the three corners of a square of g o0pg es/+v2iside 0.50 m. The las+p0v geg/io2st corner 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 ka(vs 8slw)m8 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, w(8lm s8v) aks0); +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 esqmcw*+ b830/nid fz4gz oe,f)j uw* olectric field. What is the magnitudow* +ge*w0f4icu/ 8 , bqs)j mno3zzfde of this electric field?

  A particle with a cha(*er qs/0 bbcdrge of 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 g is pla9) q. s3wohr 2ic v7rxl5aqfuc7kb 1aa. ,f5xgced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for 9f c wg,lquik77.3crrq x 5fbsaax1hav.2)o5it to be suspended?

  A foam ball of mass 0.150 g carriesif/yar4wwn8 eu r ,(;y 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 magnitude and direction of the electric fi4/w r(,fe;ni y8 yruaweld?

  A metal sphere of radius 10 cm carries a charge of +lkb d 4ubyrn6* zhf5:92.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's sub:6hrbky*4fl nzud 59rface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 tc2z6qed0o9c mC. What is the electric field 6.0 cm from the cent 9zecdcq6 2ot0er of the sphere?