State the law of conservation of electric charge.egc9n:jmlw s+gsv 8+nc0w/*j

  Is it possible for two negative charges tok+ +bqih8tnk 0 attract each other?

  Is it possible for a positnv +7xiqzaxd.o4 ,1 ubive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass*1rstf 2f1h ot rod acquires a positive chfthrt21 *fs1 oarge and the silk

  A proton carries a

  The model of the atom shows afmck9x; p).rv

  A neutral atom always hapdcyj1 1(e6i uwyb, 3rs

  An atom has more electrons than pafe 9-)+hl t7 qozo:lwrotons. The atom is

  Materials in which the elect( 6wky poiwm:8k:0ihyrons are bound very tightly to the nuclei are referred h8wmw:ykki6o 0 i: y(pto as

  Materials in which the electrons are bound very l(y6 m;xat xw3 csaa4p2oosely to the nuclei and can move about freely with36aayap2x4(t;swc x min the material are referred to as

  A negatively charged rod is brought near one end ofw/j 7020pcal6ajbeu1gac7 zh an uncharged metal bar. The end of the metal bar farthest from the charged rod w76 p hj b 2ecag/aalw007c1uzjill be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are i)fiylhlf;r qe/ c* 6 zpgp;3;placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is corr3ygfp6)if l* rz/ ;pqi;he; lcect?

  How can a negatively chasff(2zr:;4c c:kpzx r*m3cojrged rod charge an electroscope positively?

  An originally neutral electroscope ir 6uf 20y/enhbyiw(m6s briefly touched with a positively charged glass rod. T0 n6wi yey2(hrb/6um fhe electroscope

  An originally neutral electroscp tsfi+: 4v f3uy8fpc/j*td gi9 )vi3rope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscope3 9ij isp r3fd4vt/cyu*+gft: pi8fv)

  A positive object touches a n/d 56 nhhe e86m7xwapveutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the le nehm5 7wxa86ep/v 6dhaves?

  A large negatively charged object is placed on an insulate0mrhd8 5,*zeg4w e kp3 9nepfld 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 touch the negative object. At no time does either ball touch the negative object. wdnp mge5zlf,9h 4ekr3p0e8*What is the final charge on each ball?

  Charge is

  What are the units oqpmlu7:tr vg55rz*fywp959 as t .6kt ci/m ,af the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Thefme)c)fk10s r3r p:uj first charge is larger in )) c rfm31ju p0eks:rfmagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Theyg8fuy4ysz*ps8q pv0 ln 1 y-m+ are placed near each other on an insulated table. Which stateme+yy0n8vuppy *4l8 -z mssg1q fnt best describes the electrostatic force between them?

  Two charged objects attract each other with ,tl85u2zx kxca certain force. If the charges on both objects are doubled with no change in separation, the force5lt zx2ku,cx8 between them

  Two charges are separated by a distance d anrxmb98wj1m. gbr,w w4 d exert mutual attractive forces of F on each other. If the charges are separated by a di w,g9b84mbrmw1wr j.xstance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to ud6jdjb o3l,6wn7a3c 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 its original value? The force is now equwcoud3 dj6lb6, a3j7 nal to

  An electron and a proton are separated by gh j- 04. kswmk7mk1hja distance of 1.0 m. What happens to the magnitude of the force on the proton if a s0h74 smkjmh.gkj 1kw-econd electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What h0 oin2pjk o8:happens to the magnitude of the force on the first electron if a second electron is placed knj:8ohp0o i 2next to the proton?

  An electron and a proton are separax, xsxdku z (y5.6ipl/r pwg :qr84:qzted by a distance of 1.0 m. What happens to the sii:6/y5z zp 8 xl pkr dsrq.xw,(:uxgq4ze of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a sey cun4i1i2rx; gvj;8x cond 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 ce2xjg;rx8; icyu1 v 4innter of the square?

  A point charge of +Q ity: kmqz ygz; b2,;gazrq9e0 4s placed 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 at o q:9eg4k z by0r m;zgqzt2;y,ane of the other vertices?

  Which of the followingm 9y6wwww.we1zaftzu 8r *5-f is not a vector?

  At twice the distance from a point charge, the strength oj:fkd5z-t j86 bhil r0aih./af the electric field

  Is it possible to have a zero electric field value between a negative and poss7f;r0 clok .witive charge along the line joining the two clcksrwf;0o.7 harges?

  Is it possible to havn * )-gnttdp.l4dxb)le a zero electric field value between two positive charges alot )-xnbngptdd4)l l.* ng the line joining the two charges?

  Electric field lines near pyj o:+ 1.c7yne ovxb+s+ w4 pcs.boh*fsitive point charges

  The electric field sho* /2uqwukxo(vwn

  Can electric field lines intersect inql8d5rtfs ks/sx-)wo : y3;cj free space?

  A solid block of metal in electrostatic equilibrium is placed yzbu7 bd7u9i/ in a uniform electric field. Give a statement concerning the electrybzb/u7 7ud9 iic field in the block's interior.

  If a solid metal sphere and a vfyw2rd07r 9ak )gzxq/;vc h hw2rhk5p;z5 0i hollow metal sphere of equal diameters are each given the s2facwk;y7vhhid9 z pxhgr v02r0 k5w);5/qzr ame 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 uys:uio ( 7hur)o5qe d-qb*/fwniform electric fiey)i ouq:quh 7sf/(- wr b*od5eld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric ch6yzags d5*mf3ejgj - +arge

  A positive point charge is enclosiq1 vwnz+ +ib,ed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the ii+qz ,+bvn w1electric field at a point directly above the hollow sphere has

State three properties of conductoi*so9 d)tagt,rs in static equilibrium.

State Gauss's law.

  The charge carried by one electroay1,7(+k-z op fzluwy)i2 u6dtlwu9r 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 wpubsdap+ 3 7 n o-q-u2rls+e)qw1ch,charge of +2.00 mC. How many more protons than elecsquro+uw2bd,ps- l+c7 e 3 pwq)1h-antrons does this piece of plastic have?

  What is the charge on 1 kg of prot+p7 wfhu2(4d jtgkaatppr :4(ons?

  An atomic nucleus has a charge ofmriz .1lkmwo; l:whzq 3 -fn+dy1)da; $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cqv5 /mcu.d m*bm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of tmu/ qb.dmv c*5he electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them ek+*gh+1 oe(3uj u) w gg.ankw)vb j3nis 1.0 N. What is the magnitude ofj)1whue.gv(on ukn +a3)g+w3g*b ek j the second charge?

  Two 1.0-C charges have a force between them of b arli)5mgj)v4hy ,e61.0 N. How far apart are they?

  The force between a phrm c( nvvcfnn02-:;s;3ly n $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, exp+(fd7mf8ho wc erience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electricow c+h8d7mf( f force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The firs. ,or9ie k-fxyt 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 o-x, .krofie9y n the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed a-qh jumq.fy6 ,f jk53ya vnot/mc4c9+t the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are 4mt5+km yfa6ou.n,v yc9fhq 3j- /qcjthe 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 = 2.0a4a, 3hj3sesb 0 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 hejb33a ss4,a force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second poinfr0ya-c6o*s 1ff p ln*t charge of -Q is placed at the upper-left corner. It is observed that an electrofo*0n16f-s * pcfa rlystatic 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); Q3 f wfmwqi 45to/kuc2 2-= 5.0 nC is at (0, 0). What is the magnitu u w i-tk4oq2fcf25/mwde 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 = 5w 5udk w+wpz*6.0 nC is at ( wpzw ku5w+*d60, 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 vertices of an eqr78 1 rziczd9zuilateral triangle which measures 30 cm on a side. What is the magnitude of z9 zi drrz1c78the electrostatic force which acts on any one of the charges?

  Consider point charges of +e+pw.;iv*q buQ 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 tew+vibuq p*;.he 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 m. Where c(8:g7oo63x ovxv zczon the x-axis can a thirdozz8oc36 vx :x7 og(cv charge be placed so the net force on it is zero?

  Charge +2q is placed at /qdfdjn i)ru7t 4gg4 :the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on i4 njf ) 7iq/ddgr4:tgut is zero?

  A copper penny has a bx hpfgt, b-pk*-w/o87 b;sw nmass of 3.0 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 force of gravity by the attraction od -t. ce.5: zvfk2zrnbf a fixed proton some distance above it. How farv:.nkz.zre 2c 5b-dtf above the electron is the proton?

  Two 0.20-g metal spheresj4rym835.6 t ,oc8 od iiilrmo are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsio cy5i i 8odi,otj84.lmmr 6or3n 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. cdk doz;(in 18hj;kz ( What is the magnitude of the electric field at a distance of 1.(kk1(; no;cdzjz h8id 0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of xqa*n h 3r(5zb1.50 m from a 50.0-nC r b5(ah 3nq*xz charge?

  A 5.0-C charge is 10 m from a smah81 ah)b5(ekbf o9( mkxf f)whll test charge. What is the magnitude of the electric field at the locationa(hkhm15 hef f98)(ob)bfwxk of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What xwqnfw x lys,a2 ;y1 -i.(t-c26yv zr 9dzne;sis the direction of the elexvrf - 1l2z.w 2xs q,n9(ai-wzsn e6;d;y yctyctric field?

  A 5.0-C charge is 10 m from a small test chaatv-ubw6rfx( i * 8x4krge. What is the magnitude of the force experienced by a 1.0 nC charge placed a - twxu*(8kx4f6v riabt the location of the test charge?

  Two point charges each have a value of 3.0 C and are separate y*na rl7)vulmis:)tx.jq93))5ei qa)nvli id by a distance of 4.0 m. What t)3. n9)ni7a yvjmquqev ir:)sxlill)5a i)* is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0ofi:(p6s nw (sl f)zd3 cm mark of a meter stick and a -4.0 mC charge is pla(oswi3lfs z)f6 ( dpn:ced at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic yxc0e ),e5n,deh g,vzk and a -4.0 mC charge is placed at the 50 cmeye5,, zdvxn)c hge0, mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x crp.g5:bxzx;k6r 2o w= 0 and x = 0.20 m. What is the magnitude of the electric field at thebxrpr w5g6 ozk; .cx:2 point midway between them?

  Three 3.0 mC charges are at the three corners of a squ0s f,;f o:lmac0mm( xf55 lgquare of side 0.50 m. The last corner is occupied by a -3.0 sg;0 u l( fm5,qcf5ma:mxof0lmC charge. Find the electric field at the center of the square.

  Consider a square whi5(/6 ht aaphcxx sr8fr,jc kenml:431ch 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, ,1tlkjepnx86c / c:m fa4r5h3(rhsax 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 m(9m rmz,uxgs;w 3w0 ndC when it is placed in a uniform electric field. What is the magnitude of this electric fieldwwxm0 (9r 3nmd,uz; sg?

  A particle with a charge ,dp 9. llcg4tfof 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 v8lrbvv4 d)9w field of 6000 N/C pointing dowv v)rlv8 w9db4nward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed ih .0 dbxiey9-/yh)g xenside a uniform electric field, and is suspended againe/ .y)dyhibhe9 0x-xgst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charp 9ozkyx 0mr9.1u7vn 4z+kp tw+;gjznge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the szkzy.po0n99w4+vn xz 1+ukrtpj;m g 7phere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 7 9z*sb /tphni3.0 mC. What is the electric field 6.0 cm from tb9 sni/*t7 phzhe center of the sphere?