State the law of conservation r)8x ai9md y5zof electric charge.

  Is it possible for two negative charges to attract eachh0)z gdkc/o 7cz ml/q2 other?

  Is it possible for a positive and a negative charge to attract each oth aqil cs-dxub)y j840sm/+ca-er?

  A glass rod is rubbed with a piece of silk. During the process vl-pve ez :47ythe glass rod acquires a positive charge and thzvy4 -epl:7ve e silk

  A proton carries a

  The model of the atom sh*sta ) kjm/ro*ows a

  A neutral atom always haskerufhb + fml 6tl0a:90b*h3 ;y n7vhq

  An atom has more electrons than protons. Tft/xl rp6 ru30 *oqq+nq *;9zytr.skm he atom is

  Materials in which the electrons are bound very tightly to rr54,5pa klgfu9-n sxthe nuclei are referredrlgusrkanf-p9x54 ,5 to as

  Materials in which the electrons are b.fi)4bgz*-/z pq opnaound very loosely to the nuclei and can move about freely within the ma.a4 */i-p gfozzb n)qpterial are referred to as

  A negatively charged rod is brought near top 8: jdj*ww2one end of an uncharged metal bar. The end of the metal bar f28j wt:wdo*pjarthest from the charged rod will be charged

  Sphere A carries a ne z*6q4jeljm r+t positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wir 6jqr4e+l jmz*e that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elech*x ogt9wv5/ utroscope positively?

  An originally neutrae xp +wi)+ino8l electroscope is briefly touched with a positively charged glass e+i +oxnwi8)p rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positiv,bvuwx. (co3rely charged glass rod is helroc( bw.xu,3 vd near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and thec* feu)zr- o+ioylxp9b36 *9cse0zjx leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What haefxoj l 9ec 0u9rxc z*s63)ipzb+-oy*ppens to the leaves?

  A large negatively charged object is placed on an insulated table. A n fulnv0 kmj3 4n)/:hybeutral 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, str4 j v:f/munylh kn30b)ikes 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 of the Courqv+zb- tv8(z2 0lpvilomb constant $k$, which appears in Coulomb's law?

  Two charged objects are.oiumd5rt, ryf+v r62fvye +sz s94q- separated by a distance d. The first charge is larger in magnitude than the seconed ur6s .4z,fiy5-qyvrtsm9vfo2 r++d charge.

  Sphere A carries a net charge and sphere B is n3s,ysu zt*j 66sruxh g/uz+x5t jm j/*eutral. They are placed near each u/u,sjrz3x*utjt6z+h 6j/ xm gys *s5other on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the char pp1mz ddb4g/mmht-(+ges on both objects are doubled with no change in separation, the hd1pp/4+dmzm b(t gm-force between them

  Two charges are separated by a distnx*ydj fv/7v1 cvh3 o (w0l,cbance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d1w(olvvcy h/d c ,v37n*x0j bf/3, what are the new mutual forces?

  Two charged objects attract each other with a 0bxypk- ( jpz2:nc(au force F. What happens to the force between them if one charge is doubled, the other charge is tripb: uayp( (k czj20-xnpled, 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 tp:f(l 9n8y (hg9 xwwgby a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next t99wfgx(:8pngh ty( lwo the first electron?

  An electron and a proton are separated by a distance of 1qv*kd9 perg6+ -p hi4mqb 0pw5.0 m. What happens to the magnitu kemp vp+id*w 460qhb5g qr9p-de of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton areu kq8vq9-ksnp10ix 0n separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron isnsv0-i qk n u10q8xp9k moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squaa(x7ha-o4 aa ;fk 8grujv 0(gjre. When a second point charge of -Q is a;xg(uoa4k -vajj agrfh8 70( 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. 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 tpb:uxa8 upklf9 , .-pthe centroid of an equilateral 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 magnitudf pax,u.l8:kt b9u p-pe 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 vecto- lqcgmyc:kaof)i9 * )- epx+er?

  At twice the distance from xh n 4jb.giofvyr b8r;77;;jia point charge, the strength of the electric field

  Is it possible to have a zero electric field value betweenvum:)r9 ybyu4 a negative and positive charge along the line joining m)u 94yyrvub :the two charges?

  Is it possible to have a zero electric field value between ( xywd5j 3bcw6tp+k)m ,gzm,ntwo positive charges along the line joining the two cha,zgyjmxmcbwdk pn(,5+36w t ) rges?

  Electric field lines neb-hk49)na fbuar psitive point charges

  The electric field show pnh1c:cnhf6)ff p zz8o f6+(cn

  Can electric field lines intersect in65:g(p n)wc2 vkd vb5w+;epwi qxbes6 free space?

  A solid block of metal in electro4yj jx-hv1zlr t,cd4t7/oo/e static equilibrium is placed in a uniform electric field. Gi,ectjlxtvzoh/ jd4 7r -1o/y4ve a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphe o +f8/qbby c9gt(d)1kat+h+ ;g yhbmrre of equal diameters are each given the samea gb rb/yt1hk+(cbgo +;)t d8hy9m q+f 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 where a uniforlp *ve p*/0qcam electric field is directed straight upward. What can be**p ql0cev p/a said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neks+d,hg; 8 a; wfn 0j)6lpv6r.epe6ohde jp ;har an electric charge

  A positive point charge is enclosed in a hollo rku+h 70zsvf;:rn*qvqhe+jm9x;5 umw metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a poin+z;:ks5 xhr *vf7nh qqruev 90+jum; mt directly above the hollow sphere has

State three properties of conductors in static eqxr :gl j1c-nid0:g xe(jwj;pey .am+,uilibrium.

State Gauss's law.

  The charge carried by one electronzzd8/nl ejniy;*+rw/ 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 ofj0b k)uu0ye 7hsg/8gw +2.00 mC. How many more protons than electrons does u g08syb/e0kw7gjh u)this piece of plastic have?

  What is the charge on 1 kg of 0pbcur82zgqfp;p m1 iw8 d0n9protons?

  An atomic nucleus has a ch(,*.j c9 .vkyiywow fdarge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5v-d,e f.qn- l-a fq-oh cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric fh -e--alof q f.,qvd-norce between them?

  A 1.0-C charge is 15 m from a second charge, and the force between tqhfjbh/hmwk b cb ,knct d/2l+-6g494 hem is 1.0 N. What is the magnitude of the sew 464kjtdhbnmh+gc- 9/ ck2h / fbq,lbcond charge?

  Two 1.0-C charges have a force between them ofus a6e/,ex,.f c7qj y xslv9,m 1.0 N. How far apart are they?

  The force between a c ;o1b-ud)nn a$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, e * cw98zqp8arvxperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the e*pq8cr wa 9zv8lectric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The fa;. 8yl-0r y h;vyiahvirst charge is at the origin, the second to the righ v; y.yhv;aiya0lr -8ht 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 plac m-z pvqg9nnc0w sy,d;aj9+x1 ed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm n1w pm9g0 y;,+axsd9q- jz nvcmark. 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 positions: Q1 = 2.00 mC at x,xmpvis v2w243lz:vo = 1.00 mi:x, 2zvwmop32v 4svl; Q2 = 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 chyx ovl) 3tgn*: 2sex;karge 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 is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lower-left 3ot;2 k s xey:l)*gnvxcorner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.hchc8ldpzya n. 6x;+quufba:4.: vm910 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of thepzu hu:mv 8aq+ ;dnh6 fc :c.9a.xlb4y net force 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 mii1 xez+cwu (8s7npg, ); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on thezu ,pgx s781ew niic(+ 5.0 nC charge?

  Three identical charges of 3.0 mC v7k + p/lj3)c6kx fptvk4bw f;are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is 7 cktfl)p px3j k/6k+wb;f4vvthe magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q 0 gcymiha, ; kc4jf(q+lv)i,r1ua/g pjd:+ ss and +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 charge of -Q such that the electrostatic force actc; vg sk+iam4plr,/u1(h 0 gd:fy+a,qs)cjijing 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 m. Wb:;j enbe7/n ehere on the x-axis can a third charge be placed so the net force on it is ze/neen;:be jb 7ro?

  Charge +2q is placed at the origin and charge -q is plm 3y()firl,bez1afldv j0;3 vaced at x = 2a. Where can a third positive charge +q be placed so that the force oemylbl;f1vdiv) 3( r azf3,j0n it is zero?

  A copper penny has a mass of 3.04h mcvi lpe:ks* y7c3i-qhj;)w5r x d2 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 forg*:sfc bu/.w cce of gravity by the attraction of a fixed proton some dista/:u*sg .bwccf nce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by dg/er dxr/jzj5 9ij/n2( pgw;nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsiox z/259e(;pg rdjniw/j / rjgdn 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 electri7pvx2 i h;b xic9;(d-eqlu .nwc field at a distance of 1.0 m from the nucledbxxc-7 l.ihu;qn pw (e2iv;9us?

  What are the magnitude and direction of thend5t5w5y7xxx i )x442ex)3sd5pm ha cidkx : e electric field at a distance of 1.505x)4m xi5h2x 54a7:stxxedyp c kx3den5dw i) m from a 50.0-nC charge?

  A 5.0-C charge is 10 m 3b*dv)n im8wcvy7 jc;from a small test charge. What is the magnitude of the electric fieldw*vnc;3b) j dcim vy87 at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directi: 0bm1ex)s0po epbg6aon of the electric 1m )opeba p0 bsg06x:efield?

  A 5.0-C charge is 10 m from a small test charge. lk,nef )b7sdtks: 4/fWhat is the magnitude of the force/t 4),le kbd:s 7knsff experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance of w k ka6h6/l v1ciw(xaw02 tz/p4.0 m. What is the electric field at a point midway between t10a(/ kwxwka/ i h2pv6cz6twl he two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meterq5vu6 1s ryozosk;* g0 stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the zo;1q6u vk 5syros*g0 30 cm mark?

  A 5.0-mC charge is placed d*u-, l i5fmrhf6q,tejp+ 2psat the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two uhsm5, pflrj p-td*26f+ei ,q 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. a9ehb .0d3h 9ng0f hrf What is the magnitude of the electricgdh9r3e9f 0.h0fhb na field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squ mh.kx*b.blr: are of side 0.50 m. The last cob .x.:bmk hr*lrner 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-ppfv ln3h;/a 4en jc84g bnv3 on a side. 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). What is the lg;jaf44e/ bnpc3vp-nv8h3n 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 isqrln,v5i )i)rlxs z4m6t 9p p) placed in a uniform electric filvlmt6)5p)xs 9nr q i4, iz)rpeld. What is the magnitude of this electric field?

  A particle with a charge onafau7x- 8 uqa)v0 lg,vbml ;wx re( )k:c;t:tf 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 b 8ayj7g54 zdvfield of 6000 N/C poindg4byv7 azj58 ting downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.15evnhqu *ie :3i(uv 7.v0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field,i7nv.hev* v:uq 3u e(i 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 +2.0 mC. What is the y- k;vveswl0/magnitude of the electric field 5.0 cm from the sphere'svlkw0y;/e sv - surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whkilf0*a+u(t1w/o zzs:a;p q y at is the electric field 6.0 cm from the center of t w zy+z1 (0*la:aqkui;ftpso/ he sphere?