State the law of conservation of electric chargn, rk4bf.y h1qxe6i9b e.

  Is it possible for two negative chargey6f2 ws mo2 xsa2(ntc0s to attract each other?

  Is it possible for a positive and a negative charge to attract each otr8qfycyq5j e /:ud):q. . ej,as:cat aher?

  A glass rod is rubbed with a piece of silk. Dureh0qf3wj;n /sgs - 7 ws;.brpning the process the glass rod acquires a positive charge and the silkss s;0r/p-w ;ehqb fj73.gnnw

  A proton carries a

  The model of the atom ss ;/rh a;jmmlo0 ne4*uhows a

  A neutral atom always ha jik0 qd,8vim6(p nw h,l2bp1cs

  An atom has more electmprat:z jh 6,-rons than protons. The atom is

  Materials in which tdcig 6: i *lroyv)19nqhe electrons are bound very tightly to the nuclei are referred6c i*1 oldi9y:rgq n)v to as

  Materials in which the electrons are bound vq1s2ni8yw/ t13+t 7aand cw upery loosely to the nuclei and can move about freely withi8 +qyn2t w3/n c7ia1ad1wpus tn the material are referred to as

  A negatively charged rod is brought near one end of an unchgq86oymzel4 s3 1 )e,amuvx )rarged metal bar. The end of the metal bar farthest from the charged roa4el) rsm m,86xoy)e q3gz1vud will be charged

  Sphere A carries a net paw0( fphbg4m4 ositive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a(44whp0bf gm a wire that is grounded. Which statement is correct?

  How can a negativelybvm+:), g)xxtb2tzc)pk;ftrv t5 q1y charged rod charge an electroscope positively?

  An originally neutral elme /vrzzl(0b n wmoy, q+2)cn6uiu15iectroscope is briefly touched with a positively charged glassm + nmo/(5rzqc) ye v,lui20zibw 1nu6 rod. The electroscope

  An originally neutral electroscope is grounded 7aj vvvxu ca/ j70:md9briefly while a positively charged glass rod is held near it. After th0cjav 9a ujxmv:/ 7dv7e glass rod is removed, the electroscope

  A positive object touc8 xml9 ndb1s5shes a neutral electroscope, and the leaves separate. Then a negative object is brought near the electrx d9bn5ml8 s1soscope, but does not touch it. What happens to the leaves?

  A large negatively charged object rj-x :v 21rg3n vqy3ywp7:bnzis 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 tov-xpv:2wrqy1b37nzyng 3: rj uch 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 Coulo0( esp l-t )*7/jwkne +bmiqcimb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is lar co/1vstf56 v9nl7 qkkger in magnitude than the second charge.kvc1ot q6kv7f ls9n /5

  Sphere A carries a net charge s)/s*vx gifr (n4 )qmband sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostaifqnmg4)(b ) xsv*rs/tic force between them?

  Two charged objects attract each other wh;zn4xv4m0 ,xp/:cn cezqk( oith a certain force. If the charges on both objects are doubled with no channzohzvq:c 4x/ 0m;xe , c4(pknge in separation, the force between them

  Two charges are separated by a lk/gz:bw ;y1r *juja8distance d and exert mutual attractive forces of F on each other. If the charges are slkgr8uzbwy*; :/ 1j jaeparated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with wljv1 dbu*f:*+.swqi erf4a *a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth*jrvfdu*fw.b 1: ew4i+q* las its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.)k0s zpbuh2r0k-e(o06dz wkj 0 m. What happens to the magnitude of the for0 z0z e 6s-ok)rh0u (pjw2bdkkce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sepa i-k2eyb/pm+s aqzf.+ rated by a distance of 1.0 m. What happens to the magnitude of the force on the first elect/qyef abzpisk2 -.+m+ ron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to5goz x//jj5 iw the size of the force on the proton if the electron is moved 0.50 m clos wg j/5/ijoz5xer to the proton?

  A point charge of +Q is placed at 5:dp ua)yf2tbthe 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 centf b5t:yad )2puer. 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 equilaterh ay6qr4zm-x 3:pc t/ual triangle. When a se 4qah6 yr:pt/ucx- 3mzcond 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 at one of the other vertices?

  Which of the following is not a )ydss*yb mp22t( vm(k8iu7kn451k ovip7gizvector?

  At twice the distance from a point charge, the strength of the elect36 tx7m7i2y;izkl hlhv 4l-mr ric field

  Is it possible to have 0c (8 f+tfsmjbug2r5rxv.7 dm 4+kscfa zero electric field value between a negative and positive charge along the line 4urbcfm+ks+0.tf5xjmr2d87g vf sc (joining the two charges?

  Is it possible to have a zero electric field value between two positive 8 9djvj294 rzqml *ykmcharges along the line joining the two chargeyd9lqzj4k j92r8mv *m s?

  Electric field lines near psitive pok,z/w+qqg/xc p ;vs2gint charges

  The electric field sh qsg:/* llw4puown

  Can electric field lines intersect in free spacemphu fo nh2f;e45p 77-mrm0sr?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elec a6rx0q(l5*dyki 9bti tric field. Give a statement concerning the electric a6xb(0rd5 ql 9tkyi*ifield in the block's interior.

  If a solid metal sphere and a hollow metalmn4n1fq3or2f sphere of equal diameters are each given fqn1 fn243 ormthe same 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 unifor50(uccn8go s+h9mkd vm electric field is directed s5osnu9m0c+ ( 8vghdcktraight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an ele 7h-arlw62 rpgg7j m(dctric charge

  A positive point charge is enclosed in a hollowi3h8m*mtlyu 3 metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric f8y3tiu lh3 mm*ield at a point directly above the hollow sphere has

State three properties16( vrrijgwd7ejd;ewr 8i + s. of conductors in static equilibrium.

State Gauss's law.

  The charge carried by9pm+tmz312 jjxmr 1be: g cq7k 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-r7xws .mtpn 2 net charge of +2.00 mC. How many more protons than electrons does this piece of pl smr7pn2 tw.x-astic have?

  What is the charge on 1 kg owl 9xy7rud -cfx8h0; uf protons?

  An atomic nucleus has a char gtl.1*dtl3zb lz-c u kx5d99gge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by n 3 eh t,gn0ytuef4zx2gpi7:81.5 cm, have charge values of 2.0 and -4.0 mC, respect 4 xtuh,nep:02tzy fi3 e7ngg8ively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from).zc5b ()i9xwldr s fji7w4-o8mgd k i a second charge, and the force between them is 1.0 N. What is the magnitude of the secon9)ir4jdi7 bldcm wogkz5.i-w(xs f 8)d charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are(-t )pz fizs3q they?

  The force between a 9yx4iujq d3 3 eva6c0k$30 \; mC$ 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 thei;1aqn rs4c7s-ah-nh y are moved to a new separation of 8.0 cm, what is the electric force between thin7n 4a-;s1 hrs ch-qaem?

  Three identical point charges of 2.0 mC f;h +zzpm/ a ,v8ywxe0are placed on the x-axis. The first charge 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 electrostatic force which acts on thewh zv pmfe+z0;,8xy/a charge at the origin?

  Three point charges a53gvraa5 ;ik9)f zvdwg8 +hzd re 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. What are the magnitude and direction of the electrostatic force which acts on the charge at the ohgz id5g;rk3+d8zw fa9)va v5rigin?

  Three point charges are located at the followinti.mzev-5iq j8 md.i+y ahf 58g positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0v8 tz.8ij5yafq +i-e idh.5mm; 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 sq 2nnbo 14aci pe+oqkqrp-j801uare, and a second point charge of -Q is placed at the unj 8opbiq o1 0qp1re+42ackn-pper-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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Qsv+ml/d6(. na9rg7 q +st txwu3 = 5.0 nC is at (0, 0). What ln+ v9 t agq(6mt+xssdw/ur.7is the 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 is at (0, 0.10 m); Q3 = 5a0 )vb:b.ng pl. yll+a.0 nC is at (0, 0yv bb)pla:ll +agn..0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the veos;v/et-x x w3rtices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on xw;vetox3-s/ any one of the charges?

  Consider point charges of +Q and +4Q, which are seu 2niu4att ;0zparated by 3.0 m. At what point, u2uanz ;itt04 on a line between the two charges, would it be possible to 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 cha8,lyvazkwz) )rge is at x = 4.0 m. Where on the x-axis can a third ch,vzl))wa8yzk arge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q da2. c-0pdi moiie y8+is placed at x = 2a. Where can a third positive charge +q be plea-0 ddc oy i2p+.imi8aced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total 0qnzr)abf4kr 0 t( n qw()djj(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 agai5p.; ,jf bqgsqnst the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the proton .g5f;sbq p,qj?

  Two 0.20-g metal spheryrw :ny *m+;l0 *ljh9alpa b4les are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle be 0baal: ;4 p*wln+yhlrm9 jy*ltween 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 elec-7sn on74wtl stric field at a distance of 1.0 m from the nw sstln77- 4noucleus?

  What are the magnitude and direction of the electric field at a distance ka: lmf8*mxif gzxfm1 4 8d0lwxn;c++of 1.50 m from a 50.0-nC chargxk+ la mx*4 inzm:8f +gmfcwdx08lf 1;e?

  A 5.0-C charge is 10 m from ad(r/0y /d oq,jsf6yf m small test charge. What is the magnitude of the ej(d6y /mff0s,doq/yr lectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is thsa-8de- mom 6se direction of the electric f6do8smas-- m eield?

  A 5.0-C charge is 10u:mdlfprl yr l88;u(cf3vw4 * m from a small test charge. What is the magnitude of the fomv :ly8;ru4p ( fdll uf*rw3c8rce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a valuenm 3ajhg. *,gr of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a poin.,3ag j*r nhgmt midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark ofpz/. ae/y4 wt ituzr3:jy;*s 1c ss3bz a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fii:bt zra*c syj uts/zz/43.p 3w;ey s1eld at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mav4 a z,eik(bl4+kyk.ark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joiningk ,4+abevk l(ak zyi4. the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placezas;62ji0 maxos5j0ee:ds 1 cd at x = 0 and x = 0.20 m. What is the magnitude of the electric field at t6d02 sas5m0;icjax:s j1 zo eehe point midway between them?

  Three 3.0 mC charges are at the three corners of a square ,yx5tr6 yngjm8lu/o no+2st -of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric ft jy n8o25gmy -otnl/, 6+suxrield at the center of the square.

  Consider a square which la9 f , h1ime/gip:mc,is 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 the squ i,h fpge9,/i c1:amlmare's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in s5nf 4cu/nu8y)u8 flq a uniform electric field. What is the magnitude of thi5nfuny )cq8 u4sfl8 u/s electric field?

  A particle with a charge of 4.0 mC has sly ;48pm1qp 7 svfx:ba 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 0.1205llh1k 1dl j-k g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for i1l jkk-l d5l1ht to be suspended?

  A foam ball of mass 0.150 g carries a charge of -20iq9fqby n05q .00 nC. The ball is placed inside a uniform electric field, and is sus5b9qq fy n0i0qpended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm c-mp-0db ha vnn ah+v3+9zr e-kw. rkv,arries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's- vh. nr-vkh,k+ezavp9nbrm- d0a3 w+ surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is t 3ign/vst 8)oot)n3 akhe electric field 6.0 cm from the center of the sph)ig8no/t3k 3a)vnotsere?