State the law of conservationtx0bahxiz,h)n w;e0 7 of electric charge.

  Is it possible for two d;ms pebcv+n) *0 n+lg .duum-negative charges to attract each other?

  Is it possible for a positive and a negative charge to attj e qsr28:8az,rrq+ peract each other?

  A glass rod is rubbed with a piece of silk. During the. b ezn;9x.tbt process the glass rod acquires a positive charge z.tbb t9e;x.nand the silk

  A proton carries a

  The model of the atom sho.m* dir befejw8 ;3w5yws a

  A neutral atom alwaysuj 1rc87ma 94xhh/ lblv f7e3b has

  An atom has more electronshyns. uczz853 y.q) ym than protons. The atom is

  Materials in which the electrons are bound very tightly to tx8 8/yzjp0e.caja )byjo.3lg he nuclei are referred y0bjjgp3ela/.88o xyzc )ja. to as

  Materials in which the electrons are bound very loosely to the nuclei and qv81m;ez e nt.can move about.q m1vnteez;8 freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal 92s-wk0y:veraja0xka wcb q1(, wby-bar. The end of the metal q-0k 02w(j:1a,y r bvcas xweay9 -wbkbar farthest from the charged rod will be charged

  Sphere A carries a net 6 xtfrucu,o-daw7 1n 8positive charge, and sphere B is neutral. They are placed near each other on xu8o76dwf ruc1 ,nt -aan insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charggs m 2ko6q)g2azrnfe/2/xnno5k. 5 iwe an electroscope positively?

  An originally neutral electroscope is briefly : 6 :qfb:iq)9xedru(fl ,efela+0kgeo wz3y3touched with a positively charged glass rod. The electroscope6z: efqe+f)y::9q gllw bed kua,xo r(0ief33

  An originally neutral electroscope is grounded briefly while a positiv 5ficxvz4:1seky*x3oely charged glass rod is held near it. After the glass rod is removed, the electroscoxe*1 ok5zcvi4f3x:sype

  A positive object touches a neutral electroscope, and the leaves sep/04zy/ 8a zbfw y1.r5agz4fro1j oqj carate. Then a negative object is brought near the electroscope, but does notzo80 54/aa.z/ orq1jzyg1rwbcfy4j f touch it. What happens to the leaves?

  A large negatively charged object is pm m03;0w/ted jhwop,s ,byj.h laced on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches i.;0dbpjthwmeo0 w/mhs ,3j, yt. 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 mcah dq*g9fk1 /9c:jpCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firjcwlcl o(p3(f,i ob42 st charge is larger in magnitude thab lw4cj,p23icl(oof (n the second charge.

  Sphere A carries a net charge and sphere B is neutramogp rved s24h76nmj)8z3 z(al. They are placed near each other on an insulated table. Which statement best describes theze87 h(m )rpav 4o63gmz2nsdj electrostatic force between them?

  Two charged objects xzj.: o7v e;xm3zt.y vattract each other with a certain force. If the charges on both objects are doubled with no chang7xv.y: jtmvze;x. z o3e in separation, the force between them

  Two charges are separated by a distance d and exert mutual atb.qw,u aq1*k qtractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutuaqk*qaqb w,u1. l forces?

  Two charged objects attract each other with a foa:d 9:m3dn.zic z vk3fp8*dpmrce 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 re3 k3di:d9zm :cz .dmn8*pvpafduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of ;*nc0fra c ,c .;jb9z oyqv5o8k2 kgvx1.0 m. What happens to the magnitude of the jg9.o5q kncz;2k vv*,c c0fby8;oxra force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens tk,apks, : e/9 lvy9)gnsph n8ko the magnitude of the fo:s gn ,s9l 9,pn apye8v/)kkkhrce on the first electron if a second electron is placed next to the proton?

  An electron and a proton qv0 b:nbp/qg6are separated by a distance of 1.0 m. What happens to tq b /6qvn:gp0bhe size 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. Wi;;/f;( pn:0i- jb tr q(ifqdn cnsz8zhen 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 cha:0;qdifz-(tzs; ;ciinrnbf 8 (qnj p/rge 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 of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Whe )bebbxi2)6 /ftvs.p rpctpir,. e4o+n 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 placpt)+,t2 . feb.bs io 4eirxc /rvpb)6ped at one of the other vertices?

  Which of the following i: bdp1cg 4mii)(aw py;br v6l*s not a vector?

  At twice the distance from a point charge, the strength of the electri5 c9 fy8xq i -(wlnobkhqu v6m/bd2a,,o. xoc6c field

  Is it possible to have a zfx4 ,()m.-2xziic /sws2bvd 7ltyjwjero electric field value between a negative and positive charge along the line joining the two charg-xwx(si/ v d)fm c4 btwjlyj,2i.zs27 es?

  Is it possible to have a zero electric field val rd9a ):e:bjzbue between two positive charges along the line joining the two :: azbbe)9rdjcharges?

  Electric field lines near psi.mkhms7 zix;5g8 dwgh,e/t( htive point charges

  The electric field shownh u+5p3x0uwxb ji+f /z

  Can electric field lines int lp fhogj*)3.khpj/ s*ersect in free space?

  A solid block of metal in electrostatic equilibrium n a4mqt,;fay8bg*h0j is placed in a uniform electric field. Give a statement cof 8; qa *jbt,gamnhy40ncerning the electric field in the block's interior.

  If a solid metal sphere aq- -nb rtwpw(sw ;0k0z;ws)vdnd a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfa dzsvwn(wtbwqp )s;k r0;-0w- ce is

  A cubic block of aluminum rests on a wooden table in a regiw b3x*nckw 0/1 v0fkjoon where a uniform electric field is directed straight upwa0*3kn0vx /cj1f wobk wrd. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chargb9dlc 0nm243 j/hwd1cj5lv( rh zbaatu;u 5) ke

  A positive point charge is enclosed in a hollow metal.pir6hu cfy07 6rzxs /lic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hs 0rchp. ry67z/i x6ufollow sphere has

State three properties of conductors in stoyp 50t)n53n w dslkz(atic equilibrium.

State Gauss's law.

  The charge carried by one electoe k)/r.eq h6oron 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 rq1m /7dv,spw+2.00 mC. How many more protons than electrons does this piece of plastic havds w,/7qvmpr 1e?

  What is the charge o4h48 4co(0xdr1dot urlj- l tan 1 kg of protons?

  An atomic nucleus has a czyhirnf0ltgq2 (; kt1d5 oy;3harge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated63uo l43d jt2xr5gn mvlmi.b fmvi01: by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electrnif g 3vxrom4:l0jl32b.idt51mu mv6ic force between them?

  A 1.0-C charge is 15 m from a second charge,sx*o //lr z2jwrd8e.o and the force between them is 1.0 N. sr r/xwz2oe.* ldjo8/What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 Nbowsi. sf*p, )yxi j 24fp):wvih+5cc. How far apart are they?

  The force between a .:9hfx bw:/ca rfnt)r$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expe6ce n)cnnvuq*ax2 b40rience a 1.0-N force. If they are moved to a new separatvbcu)6n 2n q*nxe4ac0ion of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-abz31ulv7j 6u fzm :ri2w4dh,9hz.z0cu 8q hwd xis. The first charge is at the origin, the second to the right at x = 50uzh uqch b1i4 zm869dw032:rjfu .h,lz7dvw z cm, and 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 ozrg 1 9qh+) ia1eiff4h;)xkv lf +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 )if)fq1g rxzih;1le 4v+ k9 ahthe charge at the origin?

  Three point charges are located at the following positio56 vb( 7.ey*g qpu fq-mpobemt:,i5gans: 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 o:-a qi o7(tb p fevy,5*pbg6mme.q5 ugn the 3.00-mC charge?

  A point charge of +Q is placed at the . /vg n;he/)0uwcndja:flfb 3center 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 acts on the center charge if a third charge of gd e; wh/3.nlafjncu0v: b)/f -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.3 io( lsughd dn.;c 7;pzgt gqm:mpe: f+,e/1f+0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC chariz :slegddmf+.o1mh pu nft7 ,+/:q(g;eg;cp ge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC j)4 l ckoyua.,is at (0, 0). What is the direction,ja4.o )cklu y of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equzeksc ni2u q33n6k *o8ilateral triangle which mea*63ok z2u s3knnq eic8sures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what rf4o.woh ; 0 0)mebftr4df7gkpoint, on a line between the twg4fbhk )mod7ef 0 r ;f.rt4o0wo 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 charge isesrx 7hzp em8,n7 x.p( at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on p(xp s,h r87 enm7e.zxit is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.*a9xwgju+i t95f:e cd Where can a third positive charge +q be placed so that the force59ajc+u i* fxed9: tgw on it is zero?

  A copper penny has a mass of 3c5 zrpgqyraq *so45b2t,nqo-9j: s 7l .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 outi 4x(bgg 4atw+ /n;tf gravity by the attraction of a fixed proton some distance above it. How far above /a(i t4t+ ggt4wu;xnb the electron is the proton?

  Two 0.20-g metal sphereskxg1 b1/2hhfbk dha. fd( s(/ ezzy1u,b4n6dc are hung from a common point by nonconducting threads which are 30 cm long. Both are given identic bk/ dnf bx bkaz4hhg(y2/ hsd.e1f61,( uz1cdal 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 charge of +40e. What is the magnitude of the electricw jc)(6ompc )q)a a-rcqfs6 w:6gx5i d field at a distance of 1.0 m from the nucleuscap :6-mwd g6q6f)r5ccq)x j)si(aow?

  What are the magnitude and direction of the electric field at9k.sh.0;9xv az csyo w a distance of 1.50 m fro.sokx9z0; 9vs.hawycm a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnit bvz, 6 ;vg7.t ybkzs)pfcmn*3ude of the e p cf6m. 7y;g)nz3sbbtvv*, zklectric 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 thld9 m09z(nboo 64mi2b1wv vhte electri9mwz 0 othivb1nd 9m(2l6 ob4vc field?

  A 5.0-C charge is 10 m from a small test charge. What is the magniv,i,4typ fty* dvb+h+ tude of the force experienced by a 1.0 nC charge placed a d,hb+,iyt+vtp4yfv * t the location of the test charge?

  Two point charges eac0k7-rwezi*wu h have a value of 3.0 C and are separated by a distance of 4.0 m. What is the7z0wur i-wk* e electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma2vx ,0q02v. a fdlexvzrk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at t.q 2d2xv0f 0,ezv valxhe 30 cm mark?

  A 5.0-mC charge is placed at the 0jgiuch98( s qgj c*jf6p64nv+ cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a linv(4g6s*u f9ng8 cp+jh j jq6ice joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 aaqfg9dh3yhe8:u* b+r 4n:xxind x = 0.20 m. What is the magnitude of the electric fr:*bg3a 4hx8xdey9 +fu i:hnqield at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. exh)-1uuh zdqrlp.o41qw . 6 v The lz) .1vuhd.qq h1olur xew6- 4past corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners+9i.s d//kh0xrv g4a5ehx l cn of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3. a+nhg s/vikxl5.04xh/ ercd90 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 *mwupqfk-5;y a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of thwupqmy5;f-* k is electric field?

  A particle with a charge of 4.cm9bc a.9c9lx 6 nsi8d0 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 masx2m7w /h ecm,ns 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspewemxh ,cmn/7 2nded?

  A foam ball of mass 0.150 g carries a charge j1o-ph e 2+pgs1bv-g kof -2.00 nC. The ball is placed inside a uniform electric field, and khgbgs+ 2 1- vppe-o1jis suspended against the 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 the magz 8dsqq)-g z- .edm2zvnitude of the electric field 8 zd-2- q d)g.zqmvezs5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the el)ch(zmo3mp um ,t u38za8den 6ectric field 6.0 cm from the center of the sp,z6u8(o zp3h)cmame t8n m d3uhere?