State the law of conserva- .o)pfnyknyk/ kw 2o*tion of electric charge.

  Is it possible for two ncgof/m0r i4p-fyb9 5qegative charges to attract each other?

  Is it possible for a positive and a negati1w+gf, rwu5 o 1gsz8ovve charge to attract each other?

  A glass rod is rubbed with a piece of silj f 4znqqbej(tw457 +n7dbvq5k. During the process the glass rod acquireqvb q4 +zjnnd7qjw(4 5t7 f5bes a positive charge and the silk

  A proton carries a

  The model of the atom shows de6 ( jnnmr0,la

  A neutral atom always hael5/yne omj7ezg 8e r59p fx(:s

  An atom has more electrons than protons. The ad f6 6n687tdr5zk/xo0krn vj ctom is

  Materials in which the electrons are boco vq3 d2,-y ntwheh89und very tightly to the nuclei are referrqen3v9d 28c yhh-wto ,ed to as

  Materials in which the electrons are bound very loosely to the nuclei bw02 g*:si1oye5e vm pand can move about freely withie veb i5w1:pm* 2gys0on the material are referred to as

  A negatively charged rod is brought near one e(.e -fd- ncntknd of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be chargedd.(- tknnecf-

  Sphere A carries a net positive chamah fy(s2:m 04wx+r qarge, and sphere B is neutral. They are placed near each other on an qwmfhm0 a4ys(+:x2ar insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope p .1joqzt9 x6svositively?

  An originally neutral electroscope is briefly touched with a positively chad8)ot:.a6c z:ahj zfarged glass rod. The electr od:aj:86 zhcaz )t.afoscope

  An originally neutral electroscope is grounded briefly while a yr:op87 l ntb8positively charged glass rod is held near it. After the glass rod is removed, the electroscpyrnt: 8b 7o8lope

  A positive object touches a neutral electroscope, and the le/peqhf017ru(r)-kp rs pzd tu ng:+-j aves separate. Then ap-jqz pu/rpkgrnd 0rs:f-e(+1 7t)hu negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charn /39,oj n edf*k;gtjnged 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 object. At no time does either ball touch the negativegt3d*kn/on fj 9e,nj; object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulo) jrgunq2; gngk m-h;v*u2z4 ymb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger i n rblp0.k0vx,n ,klp 0. vn0rxbmagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. 5f0z5ap 7 tdkr They are placed near each other on an insulated table. Which statdpf5 75zatr0k ement best describes the electrostatic force between them?

  Two charged objects attract each other with a certa0c/kgyrl*yubk 3ax9pvpym02d 9xh; b: ege;7in force. If the charges on both objects are doubled with no change iek 92v/3xe xb:bh0y u;gcy9g7pr* ylam p;k0dn separation, the force between them

  Two charges are separated byo;p ,wlf*m6+ i a;-cb6jbqwrg a distance d and exert mutual attractive forces of F on each other,wlrf p6-gj+a6 owb;;im* qcb. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othhl 3i tfz dw*mu36x nzh9)sp+)er with a force F. What happens to the force between them i9x 3h fu)sztzl+h wmpn)3d* 6if 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 separated by a distance of 1.0 sqb1wv 8gb(0e m. What happens to the magnitude of the force on the proton if a second electron is placed n1 w8b b(sv0qegext to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. W5qj l 6,vupih/,h -zzphat happens to the magnitude of the force on the first electron if a second electron is placed next5-qh, zphjvul /6 izp, to the proton?

  An electron and a proton are se uk2m+i 8 *yiidt5ez)zparated 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 m di5 8z t2)+ikiez*yuto the proton?

  A point charge of +Q is placed at the center of a square. When a second pointn 6l5e 0 -w9thdaxkfh 6uv7cy6 charge of -Q is placed at one of the square's corners, ied yu9n5hlh60 kfxw 6-7avct6 t 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. 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 trianglfgy1d4;oxpmimxu9 ,2 x3 qm8r e. 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 magnitude of the force that acts on the center charge due to a third chxyr8u9;pf,io 3m mmx gdq241x arge of +Q placed at one of the other vertices?

  Which of the following is not a v.ejnbo:,/c hdector?

  At twice the distance from6 9r8nsd.poscsl 9pz489isk1pb 4q lj a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a neqlv1v)z a fvh3 t22wh.gative and positiahq2v2h w vtz vf13.)lve charge along the line joining the two charges?

  Is it possible to have a zy9ufrn;g t5y) z hjk,)ero electric field value between two positive charges along the line join,uz j5 tgh) 9kfnry);ying the two charges?

  Electric field lines near i.yj n u+jnor9wm / tqu0 jw3ic1/7u7epsitive point charges

  The electric field sh;u bvn6b9c/ jxown

  Can electric field lines interse ,w/p9dm(v jasim ;uy)pom(t.dohv .5ct in free space?

  A solid block of metal in electrostatic eq.i9tuzf+)tcj uilibrium is placed in a uniform electric field. Give a statement concerning the electric fi +. zut)tjfi9celd in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters1:rxp7b dw*2jba q v+jx2bcx; are each given the same charge, the electric field (E) midway between the center and the surface is2j*qdv b2apw+1:br xc xx;7jb

  A cubic block of aluminum rests on a wooden table in a regio4 dcacf;l4f i4n where a uniform electric field is directed straight upward. What c 44cacd4if;fl an be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an nedfe4s4pnc2 a6,/ce 7 ixc0/rsvy8e8g (jdfelectric charge

  A positive point chargehueg woe pi9xud.x+45f 4s *f4 is enclosed in a hollow metallic sphere that is grounded. As compared to the case without th h*.feuwopif5+e94 u4x dg x4se hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conbqk/ s)dwe-sp:m 4hecq5 j16uductors in static equilibrium.

State Gauss's law.

  The charge carried by*;yi gpvrifr:6 f-x/ a one electron 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/gd7e3)flvcp 40ba1 u0ujd (jrscc :ki 08fql +2.00 mC. How many more protons than electrons does teblgpjafqs4c(c r u l01fvdd8)0/0cku3 ij7: his piece of plastic have?

  What is the charge on 1 kg xnhipa z3s- it/ 7b97uof protons?

  An atomic nucleus has a 70yfpk8n cv1mcharge 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 chargend 3gwo2q e.5*yx/ftr values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them?3g. 2qoyd*w/ xre fn5t

  A 1.0-C charge is 15 m from a second charge, and t )tj zdsk- bz41g:30lqym bmq-he force between them is 1.0 N. 34:- q lbbqz1g-tmsz0kj )myd What is the magnitude of the second charge?

  Two 1.0-C charges have a force betweenctcb2i-x5bkm d e k+6;a*sql/ them of 1.0 N. How far apart are they?

  The force between a 08wfwki 1 ke-a.n t:we$30 \; mC$ 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 tq4glpbw*o5;ao70s e i eu+2 oghey are moved to a new separation of 8.0 cm, what is the electric force g 4opiu o; lq7w5 g*as0o+bee2between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first cha. +uczixe) x6hrge is at the origin, the second to th+)6zxcxe .ih ue 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 gg5i0*. .jvr,0o(z a ok uaborare placed 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. Whato,orr ab(0 o5ui..0 gzvka*gj 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 posimhvu3uf/t 3: ktions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x :vkh /3m3 ftuu= -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 p u4zax.5lwtk:oint charge of -Q is placed at the upper-left corner. It is observed that an electrostatic fo.a : xuwlt54kzrce 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 nC is at (0, 0.10 m); Q3 = 5.0 nC is b+y rgwgwr0h- ej22 m+at (0, 0). What is the magnitude of the nyh0g ewj w2mr2b -++gret force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC)yl(*i: ;u +:x iq vh)arjzmox 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 nCyl o)xim)jqzavux: *( :+rih; charge?

  Three identical charges of 3.0 mC are placed at the verticesn9sysyia,nxxa 6 r1+2yoh g( + of an equilateral triangle which measures 30 cm on i yy+21sygrox6 n+a,(xa hs9n a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, whi7 )ck/,i 13d ;iqq+akth wj0* scha7dtw2 zudmch are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on i a7ha , / )ktzuqhsim0dqdc*+ t2jwi37cdw ;k1t would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x ( abl4-ytq3*g 79v : smne*3 kauiuibq= 4.0 m. Where on the x-axis can a th9il4uyk:t(aug m3i7qe *v 3nb*sq b-a ird charge 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. Where can y-cl:iy1sw +m a third positive chargi+1m y lc:-yswe +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total ofjvdz9 8* :1pv pzzf8hp $4.0 \times 10^{12} \; electrons$ 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 .u8iy +q rf:oaagainst the force of gravity by the attraction of a fixed proton some d :ao qfi+.yr8uistance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductin cqhx) zg7ng-ib.j9 g epvj96:g threads which are 30 cm long. Both are given identical chargesg.-zj7:gbev)i x9p n9 gch 6jq, 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 +4ouq mov07nmt0tv 5l.b0hk fis the magnitude of the electric field at a distance of 1.0 m from the nu00vf+qmh7v l .butt40mnoo5 kcleus?

  What are the magnitude and dn5ml 0.v pegvai4 ,rlpj .rml7 d+,yfh j2;vn4irection of the electric field at a distance of 1.50 m from a 50.0-nC charge?7+lph4m mv4yj5earnfv. , p2llgi v,.djr0n;

  A 5.0-C charge is 10 m from a small test charge. What is5. dg asej.9o (r(mwsfjf. j;wz m6j3s the magnitude of the el.;.(r3s.f zsmsjejj mao wdw 5f j6g9(ectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of thgt 2jr;pf* tcx,m-vf5 e electric fiem,* p5f-2gv ttfc r;xjld?

  A 5.0-C charge is 10 m from a small test charg zzz8avso:g2qi ; bc/ swzc6q2qk,w,,e. What is the magnitude of the force experienced by a 1.0 nC charge placed at thciv2 ,s 2wzzwqk;qb,6szqo8 : gzc/ ,ae location of the test charge?

  Two point charges each have a value of8:/z0hnklqg o s kp/m( 3.0 C and are separated by a distance of 4.0 m. What is the electric fienzo/ (g0l h/pk:km8q sld at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick andtb(t 4,tu 2ixf a -4.0 mC charge is placed at the 50 cm mark. What is the elecxtf4 b,utit2( tric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cmkhrnr2)by8n b cue enztm116z*9as :1 mark of a meter stick and a -4.0 mC charge is plac81n2t1r az:cemnbr h 1ykz* )su eb6n9ed at the 50 cm mark. 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 = :h qtv kk)lw,*0.20 m. Wh) v:htw,l kq*kat is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the th h(ie/.+z uuporee 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 t o. u+ueip/hz(he center of the square.

  Consider a square which is 1.0 m on a sidx7enn rk 9y,l 1t3,o o)z9pie9erd ;uae. Charges are placed 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 (0, 1)n9;z,y uxe1 pntioloedr99k, 3a )r7e. 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 whehxy/ uf;i* tz(n it is placed in a uniform electric field. What thxf iz*yu;(/is the magnitude of this electric field?

  A particle with a chzarp+1t8 f*6:kz1j adhl i 8 zhueu)2parge 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 placed in an electric field of 6000 N/C g9 tibl :m0yhgz9tf 8*pointing downward. What charge must be plah*:gl ytt90m g9ib8 fzced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ballo ()-cce1qoq/yp w+ykc pzb.( is placed inside a uniform electric field, and is suspended against the force of gravity. What are the mag- pycy)e+ (ccozwop (k q.1q/bnitude and direction of the electric field?

  A metal sphere of radius 10 c +)n wjsh,g)btm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm gjhbw)nt +)s ,from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mCt ;nq ;tqfv3.gw)iqa 8. What is the electric field qan vg )qttqi .8;f3w;6.0 cm from the center of the sphere?