State the law of conservation of electriqsl,1 mw4cji e0c 7vlw6q ga.6c charge.

  Is it possible for two negao)r xq a;),m0ovf oivz*,s8un tive charges to attract each other?

  Is it possible for a positive and a negative charge to attrazynj3uimr/5awde- 0 s */emz4ct each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod z;l-9 g-/kwxpwjy 2 zeacquiresekjwz-x2- 9gyz ;/w lp a positive charge and the silk

  A proton carries a

  The model of the atom showscfuy,owi4--(uw* ktp9 )c x gu a

  A neutral atom always haskvp 658/ut:zdlr jzn1

  An atom has more electr4 kzzz,ovhy94 ,2krl pons than protons. The atom is

  Materials in which the electrons are bwr (xhl fvgya,w, y ,tlu23/sgh3g1n /ound very tightly to the nuclei are referred to yw,1y,l/t 3 h/hsgaugn(lw3 xgrf2v, as

  Materials in which the electrons are bound very looselid;eyltkv;s 6jkj;9i 65dc 2xy to the nuclei and can move about freely within the x ;jdjv6dick25ktl i y6;e s9;material are referred to as

  A negatively charged rod is broug0 6ika (h dzzz;gpq,1aht near one end of an uncharged metal bar. The ena1z p,d(k ;ig6qzzh0 ad of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere sxpkqy-)o )m qp;s 1x, 7sk*usB is neutral. They are placed near each other on an insulated table. Sphere B is-k7qpx,) ssy1q)o*p m;s ksux briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrok f* ckj2sc,,lg+qul- scope positively?

  An originally neutral electroscope is briefly touched with a bch 9u-svw3 7ac1kgf.positively charged gc97a- fg1h.vw uk3c bslass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a pot1 u ze+wtyb88sitively charged glass rod is held near it. Aftz8u+tw1b y et8er the glass rod is removed, the electroscope

  A positive object toucnm: y me8xl8-ches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, butnmye x:8-lcm8 does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neu5lt8+ o6t u:wefnlm-t tral 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 b 8etunft+: w5tll-6omall, 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 Coulomb cons +gb+w8m4gfr m ;zz58kz 2 wnwhxry)tf qox48-tant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charg (le9 ,h9 -fx- ;pp4dhzyxjz;kyy8vjhe is larger in magnitude than the second chalkj,ze;fhz h9h py(-8 xdx;j -yyp94v rge.

  Sphere A carries a net charge and sphere B is hw,:jn hslb:y7 fq atu(det:-4 3rg )yneutral. They are placed near each other on an insulated table. Which statement best describes b:ae )w(u4r3jfqhg:hl:, -dn tsty7ythe electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charge id .f2nk-2lhes on both objects are doubled with no change in separation, the force ben .-idf22lek htween them

  Two charges are separated by a distance d and ekxe:o o 5bu;:nxert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the oo:u5:xnbk; enew mutual forces?

  Two charged objects attract each other with a force F. What ha9 fub6 ocu *c0g-z;qabppens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance betweeb u *0g6cba;zfo 9-uqcn their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sel:w., kn,y b7 jnhnm(bparated by a distance of 1.0 m. What happens to the magnitudek w,nlybj:n7n (mh .,b 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 3rw a ;;0nr ird-d,iioe0b8 zxa distance of 1.0 m. What happens to the magnitude of th d00doix r;aw,;in -8ri 3rbzee 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 mci k:t 53d ft*e*odrkuk--s *wwy8m2t. What happens to the size of the forc2:td r*k t-c*u wsik58 ktdemyfow-*3 e on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q x0z5uy+j oo. )+ 0peo:yee dseis placed at the center of a square. 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 cent0s5 edeez0+:uey. poxj+oo)y er. 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 thex ,v yr4m75u;xazkq r- centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic forc 4rm,7yu;- azv5 xrxkqe 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 2ngalh arwb+qj4si;krlg g;0+c38 h:not a vector?

  At twice the distance from a point charge, the strength of the electric /njci6:v k.2zga* boefield

  Is it possible to have a zero electric field value between a negative vlcnpx3t-00 zo9rr/qand positive charge-plo93r0 n/rqxv ctz0 along the line joining the two charges?

  Is it possible to have a zero electric field value between two positim4 )zvd pcuz/95mx bbk: fax::ve charges along the line joining the two 9zvdmpc ma:xbzu)k /b45:x :fcharges?

  Electric field lines near psii-qsh6 k*xb ,ltive point charges

  The electric field shown g 7.8 om8f vayn9zd+vc0sa;uv

  Can electric field lines intersect in free sjcj w9cxx8d0u-lm- /a pace?

  A solid block of metal in electrostatic e1seavs *m-f, lw:+kpp quilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the blopws*+ pavf:l-skm e1,ck's interior.

  If a solid metal sphere and a hollow metal lrwlm +msp92 kl68p38 *hkehzsphere of equal diameters are each given the same charge, the electric field (E)pmkll6hpml8ke+ 39srw h2z8* midway between the center and the surface is

  A cubic block of aluminum rests on a woorz9w31cr,m xm-t3 fj/-qdjgu :vg g1 jden table in a region where a uniform electric field is directed straight j, 31rx/qjt-gzr:1vw mdg9c jug3f-mupward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chargmr acd5tl2cif+ f37 *qe

  A positive point charge is enclosed in a hollow metallic sphere7-o go 4xzbm57sgul:d that is grounded. As commxg5 d7:uog7 s-4l zbopared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equiliha et6vgkx83pe q0f nl-9*m0xbrium.

State Gauss's law.

  The charge carried by one electron is ,xq trzp604snc0ek3g$e = -1.6 \times 10^{-19} \; C$. 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 me iuvt 1c xl:/m:3up0 yoqk;.yany more protons than electrons does this piece of plpt; .q1 xey/u0l ioyu: kv:3cmastic have?

  What is the charge on 1 kg of prostk-e) ):yslcd6 g) o *h5hu/tqgay*utons?

  An atomic nucleus has a charge of o f1fyx- s0vxa7 0q*rj$+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm v mn8,7r7nztx, have charge values of 2.0 and -4.0 mC, respectiv7x8, tvnzrm7 nely. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betw;wfdvlbs *sqv1)n.t)wc )e iw g7ae3 .een them is 1.0 N. What is the magnitude of t.qa b3*lgwvs sw) 1c i.)fn7etved w;)he second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart arex(duw1mog8 n2 they?

  The force between a q8et*1+ ytjbd$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially5pkm4 j l0u;yn(mchof:y3 -ww 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cmwkjfu m-wcn:;moh(y40ly5p 3 , what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first c+ vkccbpt uj45(5- tsjharge 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 direction of the elecjtucv(+ bc- 45ktpj 5strostatic 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 plah/6dpry0 h n6 aut*xj7ced 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 the electrostatic force which acts on djxy 7rt/nh*6 0puh6 athe charge at the origin?

  Three point charges are locaty 4a, pwotm,2alzu.k*c5.b 0 ccykng, ed at the following positions: 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 force on the 3.00-m2u.gw,yn*a. ,4ckcz 0otmylab 5kp c,C charge?

  A point charge of +Q is placed at the center of a square, and a secondj 4g,m:qo8 fu;mid:a9tl nhn9 point charge 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 o:magh :9fdot8jn; m4n,qi 9lu n 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.xtx c2.xs) z3)cz*tb g0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the 2zcx*t s3btc)xz)g. x magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC ismm( j.yfg8o:lf8j -.)r xx xlp at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direcj:jy.8 r 8oxfxfmx.l )-pmg(ltion of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an d.y2m* : ft ovyy3jr-eequilateral triangle which measures 30 cm on a side. What is the magnitude3f*dryjt :mov2-e.yy of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are sepa /hmofu i-a6bk;;nv;crated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Qf u;b;anc/- v6ok;mi h such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge ima1e9js9i;o2,dgxc+aun8 dt icz q/5 s at x = 4.0 m. Where on the x-axis can a third charge be placed so;g jd9sa2xt 9az, u qic8dc/om+ 51nie the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is plqtq3e/rxxc l3 /zibe+bxz 7.8y5 gqd) aced at x = 2a. Where can a third positive charge +q3q q b / 3dx+zeeix)7/ctyq8zlb5grx. be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. olo i+(;voq flnfl rqd :9sx(;pnek:))f:vt / 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:mevu r.a8i6v of gravity by the attraction of a fixed proton some distance above it. How far above the electron is r v8ima:vu6.ethe proton?

  Two 0.20-g metal spheres are hung from a common point by nont3h *wzrx((/9ys mj-ysvuu6 u 6z *enaconducting threads which are 30 cm long. Both are givwx6* zer(yy shju 3auu ztn9-sm6/v*(en identical charges, 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 charg eccfag*h9m: +e of +40e. What is the magnitude of the electric field at a distance h:agc e9*+m fcof 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance ow; 4:wvq/ql4xaq 5mt)pc / tz+cdu:m sf 1.50 m from a 50.0-nC ccsxmq 5wulvzt)+/amtd :4p;wqq : 4c/harge?

  A 5.0-C charge is 10 m from a small test charge. Wha h48misv +s.ne3(ss22 e*clwofa ) hmst is the magnitude of the elefe 8)4 vwin2c3(m*e sss2hlm.ohas +sctric 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 t.un (x 5,mioazhe electric fieldm5 a(o. xz,nui?

  A 5.0-C charge is 10 m from a small test charge. What i xu8x me ,t-:vyv9(apzs the magnitude of the force experienced yx(8a t9vp:v u ze-,mxby a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have :b4 7/yp;t dfii zcg*ta value of 3.0 C and are separated by a distance of 4.0 m. What is thf4t;p * cdtg/7 yib:ize electric field at a point midway between the two charges?

  A 5.0-mC charge is placbl* zdy,7b1kw ed at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electri7 wbdybz *lk1,c field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a metsaq;r6 f8igsyz8j *5 jer stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the el j*6aiy8sj s8 gqf5zr;ectric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x ;2lcyu 6enp/u= 0.20 m. What is the magnitude of uuy;2e lc/ pn6the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners ooja f c-3d m/*2mt3vguf a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the squaa 3fmug d*ov/j -cmt23re.

  Consider a square which iop5 6cxoqo-:5*d qx dls 1.0 m 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 magnitude of the electric field at oqpq o-6dx5xdc ol:5*the square's center?

  A force of 10 N acts on a charge of 5.0 mC wef3ij*u wqk;a+ ul4q, hen it is placed in a uniform electric field. What is the magnitud*;wq a,fe ji+3kluuq4 e of this electric field?

  A particle with a charge of 4.0 mC has bx )2xohmb (x+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 f)z( hc.zppa8hh;t p1 of 6000 N/C pointing downward. What charge must be placed on the ball for)(t1az;ppcz fp. h 8hh it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ballov4 hljk9:1px ir8 xe9 is placed inside a uniform electric field, and is suspended against the force of gra9l41pj xexhokr98iv : vity. What are the magnitude and direction of the electric field?

  A metal sphere of radiuyh*iig aj)5 /qs 10 cm carries a charge of +2.0 mC. What is the magnitude of ai* gh/)i5jy qthe electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chargdx, 1-g cmhap/e of 3.0 mC. What is the electric field 6.0 cm from the center of the sp1,x /h cdm-agphere?