State the law of conservation of electric3s1ihl( kwr 2t charge.

  Is it possible for two negative char5k 1jncbiws *c0zma:cr. +2gf ges to attract each other?

  Is it possible for a positive and a negative charge to/szf lpg, ,ra 7uh6/by attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodwz4g:wzc h24 ivgt53(e c vbf l*s1ahrc/za;. acquires a positive charge and the v.swae *iv 1c;c3gzczfbrl 5: (z/g4w ha th24silk

  A proton carries a

  The model of the atom shr.wp(i()tbb yx /5ljk s;yj/m ows a

  A neutral atom always 8mkk he/0y7gzxp8sms n,ye. + has

  An atom has more electronse(r( i98vxwtwmd, k/; vmmr2v.5yhpj than protons. The atom is

  Materials in which the electrons are bound very tightly to thej rvbqrj4qi: 7e6)qhrt)/gj4 nuclei are referred to /qtir) vre 67hqr : bj)jgqj44as

  Materials in which the electrons are bound very loosely to the nuclei and ca5wzm3zfcn f g2g:io1dp1: jm 49k 4ssjn move about freely withc1:gn9jzks41f5 ms2dzwoi m4g p:f 3jin the material are referred to as

  A negatively charged rod nhdyl1zga kc0r(.7p7is brought near one end of an uncharged metal bar. The end of the metal bar farthesrp 7hkc0.g7 dy(za n1lt from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Them 249 -cb ip8rw2kzflzy are placed near each other on an insulated table. Sphere B is brieflfkc zr2 p lw98-iz4m2by touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge xl 3jo) 7cxth9az5 j/dan electroscope positively?

  An originally neutral electroscope is briefly touched with a positively char+raip p-32dz1 qxy.jeged glass rod. The elec +qyp er3j1z.i-p2dxatroscope

  An originally neutral3 2 gahm;au/dsvq 0yk* electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass 30 a2a shgvuqdy;/m*k rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the93) er71bajbj8p1/c l dq .hgdwjk(kr leaves separate. Then a negative object is br. )b8w1 /jr1 aqbj7p3hrl ckjd9gk e(dought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulx 0 r;:1jhotaeated 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 1o0xr h:ejat;touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the b ;f 69rkm*4lyj-nuhwCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a dista2q: qdmwlz)36zzxv6s, )na6i fkgxm7 nce d. The first charge is larger in magnitude thanaz72)6zvk6 gqxns ,qm6l3z)mf dxi :w the second charge.

  Sphere A carries a net charge and sphere B is neut).bnfgf- o9a xral. They are placed near each other on an insulatedg. nfb )-9faxo table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other withw*zjtshys *0 4 a certain force. If the charges on both objectst ysz 4jsw*0h* are doubled with no change in separation, the force between them

  Two charges are separated by a distance d aq08zynd*2n.agfw-t 1 m4mdre nd exert mutual attractive forces of F on each other. Inm dnegy.*a4 8q-zft2m1w d r0f the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with k rxay by, 3,so (.c6+ 4iezwoy(ta5 3juh*nija force F. What happens to the force betwjwix(*6nj 5hcsu( b o zk3yy.t43 a,a,oiy e+reen 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 separated by a distancbgulrmwd wm ;6)5)s z:e of 1.0 m. What happens to the magnitude of the forcedlsr)u;m: w wbgm5 z6) 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 h e/jhwe(t)sny.k.ox-appens to the magnitude of the force on the first electro.h(xy n) eeoj ks/t-w.n if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of(o(iwye 09aj+r 7c7 (viqf qrm 1.0 m. What happens to the size of the force on the proton ifo7(0 ea+j9ywim((rrq qiv7 cf the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center oftk44r k5 -mu bp+thb;m 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 cente r -bmk;5bk tu+mth44pr of the square?

  A point charge of +Q is placed at the centroid of an equilateras:eughv+w 6pb r2 yl2,;tpuj*l 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 chare:hv*swjlpb+6,up ruytg 22;ge of +Q placed at one of the other vertices?

  Which of the following is not a vector? .n wit)lyf2y o59fel(

  At twice the distance from a point charge, the strength of th8x k:eoxa(3*eld e6 dhe electric field

  Is it possible to have a zero electric field value bet 6:b;u6t( ux- 7:axvddsqonfjween a negative and positive charge along the line joining tj xv6x dq6udonb7f;(- ut:as:he two charges?

  Is it possible to have a zero electric field value between two positive chargesf4.1wx*h qk4hg ft c6a along the line joining the two ch1 ctx*gf qfwk 4a.h4h6arges?

  Electric field lines near psitivey8viy8d 2em g+es .4by point charges

  The electric field shownrut8b 9x k2r;x

  Can electric field lines iq2kz hy-7 )ox *5z.qg xuze2bqntersect in free space?

  A solid block of metal in electrostatic equilibrium is dib6e5lnxtugqlzv, y 4 g*3i740n f;f placed in a uniform electric field. Give a statement concerning t04yfb6,* fun3ez45 t q xinli7vd;glghe electric field in the block's interior.

  If a solid metal sphere and a hollow metal kf (4p.7b jpnjsphere of equal diameters are each given the same charge, the electric field (E) midway between the center an b4ppjj(.n 7kfd the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform zu lkd 4v2du2f9 (+,vi.mvfdtc uz5v9electric field is directed straight upward. What can be said concerning the charge on the block'+2l .(f9kuv4,v uv 9tfd5udiczvd 2mzs top surface?

  If a conductor is in electrostatic equilibrium near an electrisiuby*r(t7 21tq5d coc charge

  A positive point charge is enclosed in a hollow me)vr,nf.v c tq;tallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollowvq.vf,trn )c; sphere has

State three properties of xsv.p sd(3n5b conductors in static equilibrium.

State Gauss's law.

  The charge carried by onf/8 fbw19vo z m17/ ;ma y44qtgirlvkoe 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 protons than eleq.:s,qx 7ca)h5g5r ebn/q vrpctrons does t .) / rre,v qc:5npqxqh5gs7bahis piece of plastic have?

  What is the charge on 1 kg of proton3,1lis .qup cas?

  An atomic nucleus has a chargehl/xkh o( 16x6pt n6vu of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by l iq.n8xtex yta3(-c8;qgl 5x1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What x; .l(ax35x glq-n ie8qytc t8is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 Nf;,s ptb:a4me)/* zqvhhaxq+ qhbf *p: e, xazt;hm)a/qvs+4. What is the magnitude of the second charge?

  Two 1.0-C charges havwy fs:4667k h 9knfw9*vaivgu e a force between them of 1.0 N. How far apart are they?

  The force between a wx i5euz w.w.) lgyg4;$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm aparx fph p-1ozd)(vb1v /vt, experience a 1.0-N force. If they are moved to a new separation of 8.0 c vv1x1/v p-zp)fbh o(dm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first chauq4ww:j(jp2p rge is at the origin, the second to the right at x = 50 cm, and th:4jpwj2pq ( uwe 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 gv+ h yz+6kv3qjhl) m: wpp12mx-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 acp )+wmvj2 3k+6vz: gphl my1qhts on the charge at the origin?

  Three point charges are locatmzrp)q *z9*ue3rd* f led at the following positions: 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 thr *fl)*9 rqe3 mzdupz*e force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point chk(6wif ygj3 y+arge 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 -Q is placed at the lower-gi y3j+( fwy6kleft corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 lbhdh1 7 fe:9y9h(alj= 5.0 nC is at (0, 0). What is the magnitude of the nehhhd:(la 7lfejb 199y t 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 = cc ol53kpy mivkv 3hw*obga8r3 /+s925.0 nC is at (0, 0). What is the3kmgl8ab *pvo5s3 9k/i23 +wrv cyohc direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mCd:ek)7bu7j k mk*hki / are placed at the vertices of an equilateral triangle which measures 30 cm o j k*:kemd77bk/ihu)kn a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point chargesoud4y/z)wm :k of +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the two c)4o : w/dyumzkharges, 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 t o6 sf4v2gk:yzhe origin and a +9.0-C charge is at x = 4.0 m. Where on thg:v 2 4kzoy6fse 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 is placed 6 o-s2 ,hfsnsj */pzwa 33govrat x = 2a. Where can a third positive charge +q be placed so that the force on it is zer3-,w*hgfs vr6jszona 3 so/2po?

  A copper penny has a mass of 3.0 g. A tota vtf 0o3p9jotzft+ 3(al 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 atj4j s e+zt:sqd +r0dp6traction of a fixed proton some distance above it. How far above+4spej d :sdrzj+6t0q the electron is the proton?

  Two 0.20-g metal spheres are hung from a coqlo0ipv +/xr; +auo d8mmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostat;8da+/olxvi + u pqr0oic 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. h9jttyce000gyr;g2nze (tg : 1g5kqbWhat is the magnitude of the electric field at t1z02k0ryh(5ne; 9 ggce tjyq0b gtg:a distance of 1.0 m from the nucleus?

  What are the magnitude and direng 6j-s,k/b1*orb c uzxl2;vg ction of the electric field at a distance of 1.50 mb-n xzk2rj*g lcgu;bvs1,6o / from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test nqj i dpj*8y,8charge. What is the magnitude of the electric field at the locatio*jnp8 d q8,yjin of the test charge?

  A 5.0-C charge is 10 vskbilxntk02l1)a ngb 793j q7v: fh8m from a small test charge. What is the direction of the electric fik8 nfnk0atlb71l27hv9vxj:s bgq3) ield?

  A 5.0-C charge is 10 ha7 sje4, sn;ro. -z3dcrws-zm from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed 3j, h;zws.as7z rd- oecr4ns- at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by af0ac2c:q xywe b-;9kyou + fc(sv 7j0ldttx .3 distance of 4.0 m. What is the electric field at a point midway between the two charcf30 . fe tj70ucc9x at-+l(xwv2k;:do qyysbges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC cj/( f vfhr3i) 2m5 i.hq9qfosjharge is placed at the 50 cm mark. What is thfr3h/ ojq2) fvi5.fmq i(j 9she 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.ul7iue rr.f7ofbga+2o6q*j,0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric fiel*or+.b ueol j7g7rqf6ifa,u2 d zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x*frb16frd.q6x.z5 lxeod 3o x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point65dx oe 6fr *.qlzfb.rodxx31 midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Th 0 ptljidfo a0p4v mq/7--p9 sl)y1zese last corner is occupied by a -3.0 mC chargeai)7-9q0teympf40dv olplzs/s - 1p j. 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 o5or3u;q) o.4p ylurl g fsw2v,f th2uorglfqul,3r)p oy ;.w 45vse 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 square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform electq 7vpbd+* xs x n5,ryn(hwlhh-q:m+t) ric field. What is the magnirb p+-7hst(*) h+dl qxnx5 mwqvyn,:htude of this electric field?

  A particle with a charge of 4.0 mC haswnn;5:fo u6eii(4v n.ba 4ajc 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 electriwx:ge6k f9jr 2at2t 1cc field of 6000 N/C pointing downward. What charge must be p92jrkacwt: g621tfe x laced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries aej)fqvv) go44r/7 r ju charge of -2.00 nC. The ball is placed inside a uniform electric field, and iorve q) /j47r4j)gf uvs 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 j 0 zhjw +1u*b;pcos8f+2.0 mC. What is the magnitude of the electric field 5.0 cm from theo cb*;1wpjj0zsf +h 8u sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. i,j o.cs58yyydt+.l i What is the electric field 6.0 cm from the center of the spher.cyo,i+jlyds5y . 8it e?