State the law of conservation of electric 6b.dal1,r q lecharge.

  Is it possible for two negative charges to a6l 93jvl8+o ax gtsb6ottract each other?

  Is it possible for a positive and a negative charge to attrmlx- 4py0qxg;feby5 7;yre z1act each other?

  A glass rod is rubbed with a piece a6oy48:qip :r,qgxni of silk. During the process the glass rod acquires a positive cragox:8 4i : 6piyqqn,harge and the silk

  A proton carries a

  The model of the atom shows a7,r32 k2glrh kvcfgm/

  A neutral atom always h:vd1n w.-ztui as

  An atom has more electrons than protons. The ato*i deg awqql5n6+8 t:jm is

  Materials in which the electrons are bound very tightly to the nuclei are r k5btgd1g..tus-uay jc8w6bw3c*mk xoj7n5.eferret.8jdbgju6 a5 t5wuycnkb7k *.o.c m w 1xs3-gd to as

  Materials in which the electrons are bound very loosely to th(a-rfj*q :oy, b trp.oe nuclei and can move about freely within the material are referred to asr qy.bfr-j pt:(oa,o*

  A negatively charged rod is brought near one end of an unchargy*c r2 6k bss6 fhr+1owkx)xx/ed metal bar. The end of the metal bar farthest from the charged rod will be ch6of1+wkb/2rk*srx x)shc6y x arged

  Sphere A carries a net positive charge, and sphere B is neutral. Theykdln 1mw-79a o are placed near each other on an insulated table. Sphere B is l9mn7 aw-o1kdbriefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an a6d74pg gnxn8sbjbg8j(m:)o electroscope positively?

  An originally neutral electroscope is briefly ti -jjqdg0 hn6 1g1f+muouched with a positively charged glass ro 6j1ggimdn0-+fqh1j u d. The electroscope

  An originally neutral electrosco1+gsz*tak8abue39eg4s ),9 lbpr lb spe is grounded briefly while a positively charged glass rod is held near it. After th,lt3kal8 ea* 19rbs+gps4)ubzb9 esg e glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. The a/,0iwgbu( eo zmau2dt5c6x/n a negat,6gixd/0au2(/ omc5ueatwb z ive object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed oxnr/ 6*4+lezwtvw55 ;fc apy 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 stopsflv*5;rean cto+z4wxp wy 56/ . 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 consawi2,o7z zon +tant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a qgab n8,. mp+qdistance d. The first charge is larger in magnitude than a ,pbqn.+ g8mqthe second charge.

  Sphere A carries a net charge and sph .:)ccx1q qtwy.4 dkmxere B is neutral. They are placed near each otherxq)k1.: c xyw.4tdq mc on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attrdmuozh8 6aq6 1act each other with a certain force. If the charges on both objects are doubled with no change h1ozumq86 d6 ain separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forct.cg3ts6 kt.u2 kmqaqb 6u, z.es of F on each other. If the charges are separated by a distance of d/3, what ar3amqgttucq .z6.t b,s6k ku2 .e the new mutual forces?

  Two charged objects attract each other with a force F. j+4,fb rvh2jt What happens to the force betweejvr f4,thbj+ 2n 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 separam3xew2m4f09 n r w5l8gyzqxo7 ted by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a secq 30rxe 8g7f9nolxwwmyz24 m5 ond electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. Whap.pkae 2xq mm52:c)yp t happens to the magnitude of the force on the first electron if a secxk:p2 a mpcq25.ym )peond electron is placed next to the proton?

  An electron and a protonx*0nejej u( g3 are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is movenx eju( g*3je0d 0.50 m closer to the proton?

  A point charge of +Q is p:d3 ofnc: fpy9laced 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 chcy:3o nd :9fpfarge at the center of the square?

  A point charge of +Q is placedo* ju.m2q3zxi-6assk at the 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 magnitude of the force that acts on the center charge due to a third charge of +Q placed akima63-jo u*q 2z.ssxt one of the other vertices?

  Which of the following is not a vector? d(/m i3n+gy1ladkg1q

  At twice the distance from a point charge, thxs- c82 j48j pelrsd:ytb1e2we strength of the electric field

  Is it possible to have a zero electric field value between a negat /yg,fvh,/d p* 6clr2mak vcd/ive and positive charge along ty*2,dpvkg dh6/c/l/va, m rcfhe line joining the two charges?

  Is it possible to have a zero electricw :ck 76./ ;y) dylwsge vh.xntx:5sgy field value between two positive charges along the line joining the xygx h7.vkcdtn ;yw6) / 5 lsyesw:.g:two charges?

  Electric field lines near psitive po)lrbx2spq8n v7o-k h :int charges

  The electric field shob2u 7 -:uy1g2rv-lhs ek*tbd mwn

  Can electric field lines intersect in free spac,8 vejoyc e3ja70i5nle?

  A solid block of metalw1y9dr2p i / (+ggzsjt in electrostatic equilibrium is placed in a uniform electri gt+ r2w sz(/dy9gjp1ic field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of eqk8;j q b6pnf.pp *2rehdi:uw /ual diameters are each given the same charge, the eljeqidu pw.k*p28hnpf; / 6 :rbectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in dxd.-itmq/j8 gv 5k9l a region where a uniform electric field is directed straight upward. What can be q8jkdi5dvtx9.lm /-gsaid concerning the charge on the block's top surface?

  If a conductor is in electrostatic e.rkpd*mwq+h gb3f-w: quilibrium near an electric charge

  A positive point charge 0 t +wmg7rdz8mdl+9yi is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abov zrmw7dit08ly++dg 9 me the hollow sphere has

State three properties of condacle2gpj04wx 3 e) y5vuctors in static equilibrium.

State Gauss's law.

  The charge carried by one electrowzuuwpo--c r. 7cu p8 c,4vyz.n 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 ofs-ut4ky v4 ,tzgm4 g3z +2.00 mC. How many more protons than electrons does thiyvmzt tgk4-4 3,4 zusgs piece of plastic have?

  What is the charge on 1 kg of proto6rf65 ,s.6 4cupcns qod2if ssns?

  An atomic nucleus has a charg,teqo5j r mru:wh92 /mo v4tl(r-p)rje 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, h3uwn:z*dfy.j wd m 7r*mx 3ot8ave charge values of 2.0 and -4.0 mC, r 7 8nrx3*fwmd.:omut*wydj3z espectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second char vgqf3.4ja sgy 1ic6z6ge, and the force between them is 1.0 N. What is the mag6fv as 3gcq6z.iy4 1jgnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart ar 0sgbhax 0)vy( bap))le they?

  The force between a k 6fr2ykkg1u )g mhf99$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cszx81qobm/cxz1 q( x0 m apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electriqz x q0zms/8x c(x11obc force between them?

  Three identical point charges of 2.0 mC a2 xbp bz*xhx-s k+*es f+:p7ydre placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, x f dhy:k+ 7e+sp*bbpz2-xs *xand 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 i0qe+0/rm usoy2 mho6-j tmnclq d;/ ,is placed at the origin, -2.0 m C to the right at x = 50 cm, anc,mqr/d omjq02uin+h m/6e;t s yol0 -d +4.0 mC 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 located avooav w1ctle9) 5i;.ut the following positions: Q1 = 2.00 mC at x = 1.00 m; e9v15vi)loaco.;tuw 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 - ola w2rqccln,ecv f*l h057 3tc0k,qis placed at the center of a square, and a second 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 ,l0of5qckc,ea l2 lq- *nvt 3 7rchc0wacts 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 mc0llc3lb* *d b); Q3 = 5.0 nC is at (0, 0). What is the magnitublbl*3c dc0l*de of the 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 m); Q3 = 5.0 nhnt))6ml)-5n3wbz)j p b nebfC is at (0, 0). Whw))bn356mf )zb)jp ln-tn he bat is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 un 2g f*sbb;uk/u-ec -mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitu eu-b;nug* 2- cukb/sfde of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.f8nx,xua cx34tf kos; x)2iypuvu6 */0 m. At what point, on a line between the two charges, would it be possible toikuo/u f4f8x2xc,yxvat pn3)u ;6sx* place 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 charg41e )c seeh5ade is at x = 4.0 m. Where on the x-d 4 cesae1h)5eaxis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and5lblp kki8g/ :fl4ai 7 charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the ffp:/ bi 4lk58kli7agl orce on it is zero?

  A copper penny has a mass of 3.0 g. A too*d;icgz8q 9m ao)1s wtal 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 aga;wu.) xswpzi/ inst the force of gravity by the attraction of a fixed proton some distance above iu)wiw z/ ;spx.t. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a commozulq5j6h.vlp / ,hx/-r8f(m fm6eeez n point by nonconducting threads which are 30 cm long. zj86mm u6 p lf/z h,.r ehqxelv/(-f5eBoth are given 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 chld djmgbr0*n 15 x:)dvk12 wkq-x xe;uarge of +40e. What is the magnitude of the electric field at a distance of xlgxnmd:kq evx0j1r2 uw 5)ddkb*1; -1.0 m from the nucleus?

  What are the magnitude and direction of the electric field a9l+wgwt1sm0m4vy)hig 7h ,xjt a distance of 1.50 m from a 50.0-nC char 7gm4y9v)ixh1j h wwm,gts0+lge?

  A 5.0-C charge is 10 m from a small tesijn:v/vn)ych1 (1n eot charge. What is the magnitude of the electric field at theoen/v:h1njv 1i cy() n location of the test charge?

  A 5.0-C charge is 10 m fromu aezed+ hq21; a small test charge. What is the direction of the electric fieldzd1+;q uee2 ah?

  A 5.0-C charge is 10 m from a small test nk 2kbq v* q;f (bd*foovl ;;:+1pqmvskx **dhcharge. What is the magnitude of the force experienced bkn *okp2lo d(bvx+; ;*1;ff*d qhsv k*vm:qbqy a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 Cw3w :dzydw.nuj*c)e9 tgh+4e and are separated by a distance of 4.ujz*:wy t39we h wng4.ced) d+0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 2imetl-j) k w53,fxbqcm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is tk3-)i,q2mb xtwf el 5jhe electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC ah90pqwf.og f: s9tnny21p lxjn9b4vhx u,+3 charge is placed at the 50 cm mark. At what point on a linfn+av3: j1 u,9x0 w 2nh9.fg9ypbnotqlhsx4p e joining the two charges is the electric field zero?

  Two point charges of 5phu6- adro) y+3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is th56a -r)udpo hye magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.5 6qtogha tu;x58,vz3 -vx6whx 0 m. The last corner is occupied by a -3.0 mC charge. Find the elexq6t- 5gth, x;axwvvz8 o3h6 uctric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are qhys.7tjb tt,oub ;+aea9 c*h4oa68u 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 tha*ebt;a uyo6a ub8qs7th,co+. 4j9is 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 electt1,vsm 7 le rj1hbw0/lh9e7vpric field. What is the magnitude of this electric fies eh,tjv rw97bhev 7l pl/1m10ld?

  A particle with a charge of 4.0 mC has i1ydh,zyl h/,b* .yiya 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/lg6qbnuic z c+w56 8+uva+ pr(C pointing downward. What charge mus(ac56v8wur+nugzc l+bi q 6 +pt be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nmm p)eqf,h361i y nei4xy0 x*gC. The ball is placed inside a uniform electric field, and is suspended against t pgey410xi3 6f,)q enm*mi xyhhe 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 t-j2k1z)(19rwy) ircrdq uj0s cdn g;the magnitude of the electric field 5.0 cm from the sphere's0dyz ru (9 cn))rj 2rtd1gq;sikwc-1j surface?

  A metal sphere of radius 2.0 cm carries a char1p* pf2o fbv.uge of 3.0 mC. What is the electric field 6.0 cm from the*.pfobv2u p1 f center of the sphere?