State the law of conservation of electric charv7wcr5un o /r7b/i 6joge.

  Is it possible for two negative charges to attract ea ,/pnf /lns7:wyjeqc (ch other?

  Is it possible for a positive and a negative charge to attractpyy3g-ufz y.p8 fy-dv)oh m9 : each other?

  A glass rod is rubbed with a piece of silk. During the proc0wma9 l1gh.uiess the glass rod acquire9ul0. gw1himas a positive charge and the silk

  A proton carries a

  The model of the atom showscz 2rh(gbwpnfb y 6cd9; c;e0/ a

  A neutral atom always h9x8m+c x pnv u2oza wg9ji8k;(as

  An atom has more electrons than protons. Thgc m.xy vokjq uv+7qw tw0/1u.8 q5l,ne atom is

  Materials in which the electrons are bound very tightly to tne.00+eb 2nxck a wb7nm0de*zhe nuclei are referred t7b maec2*b 0wn.z+ xnkden00eo as

  Materials in which the electrons are bound very loosely y9 5 fo8 t.npfz,i+rdito the nuclei and can move about freely within the material are referred to asyiz 5+n,9f trpf 8o.di

  A negatively charged rod is brought near one end of an uncharki8 o0 a.+ *59r3 xltjjvalxfdged metal bar. The end of the metal bar farthest from the chargef+ .dt* k9ia5x8ajvrl oj3x0 ld rod will be charged

  Sphere A carries a net positive charge, and sphere B is n h(4cmag6z;a-i.ys oo eutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire aoah64s;o(.g-cz miy that is grounded. Which statement is correct?

  How can a negatively charged rod w u.*sc/xy6kd charge an electroscope positively?

  An originally neutral electroscope is briefly tou iie6h7ns*mcgqe ;6-uched with a positively charged glasssece ih6; q6ming *-7u rod. The electroscope

  An originally neutral electroscope is grounded briefly while a5 l- o(/zfnpop positively charged glass rod is held near it. After the glass rod is removed, the elec popzn/ 5f(ol-troscope

  A positive object touches a neutrallh bbhe. 89wd0 electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happbd hh.e9 l0w8bens to the leaves?

  A large negatively charged object is pl 3.ig6 gze/wmyaced on an insulated table. A neutral metallic ball rolls straight toward t wye.ig 6z3mg/he 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 object. What is the final charge on each ball?

  Charge is

  What are the units of the Corj;i o0h vty:59 1s)qhyw7cjnulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance di8x14gh3wlw. 7khq jr. The first charge is larger in magnitude than j341qhx. kl8girwhw7the second charge.

  Sphere A carries a net charge and sphere oglw gqkb/*k-,v6)gzbh yu :3B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostag)vk lgukwg z,y* -qb:/6h3b otic force between them?

  Two charged objects attract each o6cdx:iw ;f/a hther with a certain force. If the charges on both fc:i6h;dax/ w objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exi+fx;cd8q5zmg+zc6c i x+2z qert mutual attractive forces of F on each other. If the charges are separated by a di++ qc8x;z mgq i5fcxz6zi2 d+cstance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to t6yun*k 8l ge;ghe force between them if one charge is doubled, the other charge is tripled, and the separation distanceg86;yl u enk*g 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 m. W2hf7a, so dc1mhat happens to the magnitude of the force on the proton if a second electron is placec 7 ,a2somf1hdd next to the first electron?

  An electron and a proton are sepauo,t6.edhy;.gbmm)la gw-4j rated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron mju,b)l -.h4o aegd .y6wgtm;is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hapr 3+9 qw(;.dpz olgtfdpens to the size of the force on the pt.;3q(dl p ow+gzr f9droton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placeba.i611j funbe nc ;t/l,+ter-c ky5jd 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 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 o tc1ecjy+e/6.i1- rkb5;al t,nbnfuj f the square?

  A point charge of +Q is placed at the centroid of an equilateral triangshu4,f+5zsgxb; g ,bwu *-y lkle. When a second charge of +Q is placed at one of theu b,,bgyfg4 wsxs-lk;+* u5hz 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 a vectorv, g e52p,e3mn0sk ,gbijkib6?

  At twice the distance from a point charge, the strength of the electrwf q suk4-e+*gic field

  Is it possible to have a zero electric fie9svz l(gae1c*ld value between a negative and positive charge along the line joining the two chargeszsa ( ge1*lcv9?

  Is it possible to have a zero electrmgxoc+ o(p *wri,c+l6ic field value between two positive charges along the line joining the two chwcri+ xpgco( , m*lo+6arges?

  Electric field lines near psitive point charge5j+tpsm-om1l1)5 f9 q vzzvtts

  The electric field sho7( ruhwv(avs ,wn

  Can electric field lines inters r ;rd;p5al/l6 ctp3ryect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform g.v hzn0o z8d kr)fz)+electric field. Give a statementf8.o)+zngvh 0k z)dz r concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow j2ha sxtae2 ol k2qx x;(5p7m*xe2g9kmetal sphere of equal diameters are each given the same charge, the electric field (E) midway between the 22xtj2oekp*;lxea aqx 5 x 92 s(hg7mkcenter and the surface is

  A cubic block of aluminum rests on a wooden table in a reghuj:zn4,z90,-*ei v m xe ebovion where a uniform electric field is directed straight upw ,v zeou *bx-m iee0zn9,:4hjvard. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equili0 xjy/(a ja*vubrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is go:*uolby ;(w/uguq/ 7k xkdr( rounded. As compared to the case without the hollowxd g;*y u/w:7/(orbkq kuu(l o sphere, the electric field at a point directly above the hollow sphere has

State three properties9otn y)1efq /i of conductors in static equilibrium.

State Gauss's law.

  The charge carried by o0q8r3 : (; wvhrm htiamdux,7one 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 +2.00 mC. How many more protonsd):xe:-bsnhr/ 1xh ;x+ g2ytddln+c s than electrons does dth/:hb + csx ;d2:ngx1yx-lr+de) s nthis piece of plastic have?

  What is the charge on 1rp5+sik+jayp7/ yqk o f4 +6dc kg of protons?

  An atomic nucleus has a charge of g(dv; i8 ft.vaoqoo*j9f) / su$+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1. 6*gk/1;w cr efmejkm*5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betweem 6fec1kme;wk/ g j**rn them?

  A 1.0-C charge is 15 m from a second charge, and the force betweenv4bs, o //ao pbt1rue) them is 1.0 N. What is the magnitude of the,o spbuo4bvr 1a/ )t/e second charge?

  Two 1.0-C charges havei) yime,xs:+lul i5wn1 i)*uo a force between them of 1.0 N. How far apart are they?

  The force between a ou2n9yqm p5ap 35r c6e$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initiamgic*.5 fea uxbsz( q*a0mj1. lly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 85 bcq0gea.mz1 umxjf*.s (a*i.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first c2t.0o6p ipbh(pw ( gfvharge is at the origin, the second to the right at x = 50 cm, and the third is at the 100ib(2 tpp0f.vhgp ow6( 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 ttps+t/) vs6lof +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. tvs)+lpts/t 6 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 mCa67(b4gb-/)9xxks mx( x( klttva ejs at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitumlaagxxv/46t(x- be x9((js t)kk 7bsde 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 3bi kga,n2ph4x -r(bppoint charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on thxnbahpgi(k ,2-4bpr3e 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 2)g wxq:fa:hbo29 pjn+-g nh jm); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on tg wj9bnh+ox aqh2jn:2 f: -p)ghe 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 mj 6( lcjl7l 1fie/-hzn, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wha-cfjlleilh(76/ 1z jn t is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices .9 ck yd 9 q)xgi:b++bbxk 6zj-;0qkdx t9hmfaof an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the ckbt+jqh.d ) +c x6 amy xxg0qb:fzb-d;ki9k99harges?

  Consider point charges of +Q and +4Q, whi,,-g)ve j) rlgddnh +jch are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place,,ljej +vr-ggd) )hnd a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 i+t 4fp, /lhwpg+ e2qam. Where on th2+fwgl 4,iepqhtap / +e x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q us6)t okshz14 xsg85yis placed at x = 2a. Where can a third positive charge +q be placed so tgs )u ty4os51zshk 86xhat the force on it is zero?

  A copper penny has a mass of 3.0 g. A vnsexx- l +nqe, wqx (:+ms94ctotal 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 attrarr2m.ibz( u77jz kw 2yction of a fixed p 27(r uymbr27z. zjikwroton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a comriy9-e :/vt cpelek3 u2:1avf, 0r ykfmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the a,r:yekf ckl-0i9 :epr3u /vftey a 21vngle 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 elegy;u4 wu y 1)+gmpkhz;ctric fie+ ) u;uk hgyzm1;g4pwyld at a distance of 1.0 m from the nucleus?

  What are the magnitude and direxcd 9fwg)u8h h07 ra8bction of the electric field at a distance of 1.50 m 8 f h7r)d gu9xwc8ha0bfrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of t b ivp v4u zgiu0)dp4*bam*q**he electric field pv *ub m g*bqd0 ii4a4*vzpu*)at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What i 0 hscu(cn:/wjs the direction of the elechw/n: cjucs( 0tric field?

  A 5.0-C charge is 10 m from a small test charge. What isa8 lp)q8l w4z/dfhqra .y(l3d-pow1o the magnitude of the force experienced l(wf1l)8a3aph.o 48 dpqrdw-/yzl oq 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 distanceekx 2f*.mu2trx; 1 lgv of 4.0 m. What mrg v2;xuxf1 lt2*k.eis the electric field at a point midway between the two charges?

  A 5.0-mC charge is plac m+o4u haul 37j0kv6ebed 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 electric field at the 30 cm6ejvb3+ k70 amuu4 hol mark?

  A 5.0-mC charge is placed ycj4qoyis: 6(at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm(qo syjcy6i :4 mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -:3/0-7wsedamldsgh b s v4gu25v- vzp7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the elbvvl-sv :/ dagm27 g- dhs3zsu 054ewpectric field at the point midway between them?

  Three 3.0 mC charges are at the three corners3n s5*g/ cafpix4sm2y of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field a/s3yi2n5cgmp4 ax fs*t the center of the square.

  Consider a square which is 1.0 m on a side. Charges are3wu ei i.s78 me-lb8bjawy8o6 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 o.-alojbubw i67iy8 88sme3e wf the electric field at the square's center?

  A force of 10 N acts on a chaqto*+) 9uy.zxq *ymncrge of 5.0 mC when it is placed in a uniform electric field. What is the magn.oy** mqcny+tx uq9)z itude of this electric field?

  A particle with a chmui k;v. m8u5warge 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 omfy1o g6 ;4,pf9k(bpvcws 7sis placed in an electric field of 6000 N/C pointing downward. What charge mu9 mvbcgop sf(py6,wsk 71fo; 4st be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge ksq.4 ca *e*endw9v9m 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 elwa*s d q9c9n ee.vmk4*ectric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnmt cg cl6l3h* qxst:g,* wjq+*itude of the electric field 5.0 cm from the sphere's surfac3 6tcws* lmcx,q*h qj +lgg*:te?

  A metal sphere of radius 2.0 cm carries a charge of 3u,g 5a ut ) bk4h6nyinwag0;n4.0 mC. What is the electric field 6.0 cm from the centati6k nuuybn g 44g5;0a h)n,wer of the sphere?