State the law of conservationormcd 0(3v-e2amz/a x of electric charge.

  Is it possible for two negasdzqtbg4r 35w/ u 6a7gskj:f 6tive charges to attract each other?

  Is it possible for a positive and a negativ;m-li mdlj3 i:e charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process thp.v zc3zk;ay u-sxe )6e glass rod acquipz6.-a )kuzyc 3s ;vxeres a positive charge and the silk

  A proton carries a

  The model of the atom shocrqa4m;r e+w/1p p o94lb7c)c itk/zjws a

  A neutral atom always has 6g0xwp(1j/ )xqnub5 i+ss bex

  An atom has more elect u+3nq2bfgx;;5 ktwwerons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei exih 6x5 ,rr(nare referred to a6nri( he,5 rxxs

  Materials in which the electrons are bound very loowenfzk;b-2*au 8t2ax sely to the nuclei and can move about freely within the mat2ta*eku b2fw-8; xaznerial are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. T )soqbvjj 599 6of,z rr(tu,vqhe end of the mrjo b)v,u9oq( qztsv,95 f6r jetal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They arc z)hxl6(4uu b+us r8ae placed near each other on an+(scz4a rlubhxu 8 6u) insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively e+j+o pjkpg )-3ol 6ghcharged rod charge an electroscope positively?

  An originally neutral electrosty ayiiyvlf m1q37ed3j-+ :.bcope is briefly touched with a positively charged glass rod.itjf: 7+myv3eida.y1 3-ly bq The electroscope

  An originally neutral electroscope is grounded briefly whilakl/) ;dq65xa -w0bhneknaf p; yey*+ e a positively charged gle-hyn;5*k+ qakx0 nea/)y pba6 ;lfdwass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separa.3x r9bgh etlxjxzne- t;k u89rt60) ote. Then a negative object is brought near the 3 86.x9k- ltzeg rb;)oe0ht9j uxtxnrelectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objec. tzar2w67dk zs tv:.rt is 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 forwa.7t :ard .tzkzvsw6r 2rd, 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 Coul9z8veg) 4wanp omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first/ oolx3i(p48aei1uo.zyru* f-u- n js charge is larger in magnitude thuonau/- *f8ix3lzioy-se(4jp 1. uoran the second charge.

  Sphere A carries a net charge and sphere B is neutral. T- by8(0a4m.lzm sxk p*nnu ;zghey are placed near each other on an insulated table. Which statement best describes the electrostatic force betweznxkl0(m pu.y n-b; gm4* s8zaen them?

  Two charged objects attract each other with a certain force. If the charges )- gyf9u5+1p :-z;er wafxpnwowsam6on both objects are doubled with peorp n wuw;m-+5 gf1y axs6)fz:w 9-ano change in separation, the force between them

  Two charges are separated by a d;8*vkmaivrq/o w 7. mpistance d and exert mutual attractive forces of F on each other. If the crkwvmvp8o ;.im7a*q/harges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with gqgckd+v* )jszx ;0y .a force F. What happens to the force between them if one charge is do* q g)zgjsc0y.;k+xdvubled, 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 ah 4hgl3af; 9 q:tqp ext3kkd/( distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next th;q /g3hk x9ptf4 k:qlet(ad3 o the first electron?

  An electron and a proton are separated by xftc l))k;6lo3.qwi ka distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second ele.kw) xc6o;f iql3)kl tctron is placed next to the proton?

  An electron and a proton are s8zl mqt4kb; 5xwg *bu9eparated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moveg l5k9uw *b;xz8tqb4 md 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When ssigdw73t wks )kf))6o lx.u/ku 7he2a second point charhud)ks 7s k u27gws6kfe lx.))w3tio/ge 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 center of the square?

  A point charge of +Q is placed at the centroid of an e-cqac gf4i:6oai( d 4jquilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic for6(oc4i - q4:jigfaadcce 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 nu:w0- .mzz.w2fur2lbe0ov nbot a vector?

  At twice the distance from a point charge, the strength of thet gk 0nj:),pco electric field

  Is it possible to have a zero elect3g.lou z5-hke ric field value between a negative and positive charge along the u.h-z3k lo5eg line joining the two charges?

  Is it possible to have p.+vg; y 673 wut z4mfzcnvtd3a zero electric field value between two positive charges along the line.+m uyc467vvz3t;pwn3zg d tf joining the two charges?

  Electric field lines near psitive point chargenico;tka- 9i 7lqjr: 4s

  The electric field shokiz da l3w)t/.wn

  Can electric field lines intersect in free spacb )78,m pzhhg rkan;e/e?

  A solid block of mets zbw4( ,2b bd3gbhe3fal in electrostatic equilibrium is placed in a uniform electric field. Give a 3ewb243,b ( sgzfbdbhstatement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal agesosyu1-v2-/ 8 *9c6 hi ( earczapxsphere of equal diameters are each given the same cha6c c/xre8a-u91*-sg eas aizy2hov p(rge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a q,go,autq 24co8*g1+ aieqndo, 5 by9u4s xnwwooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's +5doo,gs 4e*a ot1gac9q8n , byquwqx4i2, untop surface?

  If a conductor is in electrostatic equiv64zlce9y be,c-u9p u librium near an electric charge

  A positive point charge is enclosed in a hoh z1x7wigun, :llow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sp,g:wxhu1z 7 inhere has

State three properties of c/ov7/emda e5wg1 h( puonductors in static equilibrium.

State Gauss's law.

  The charge carried by one elewp ;42qd vwpn6ctron 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 o :w7fxgsia .,than electrons d .if 7g,xso:awoes this piece of plastic have?

  What is the charge on 1 kg ofxqu-k y27z yrs aswp.z 7y)50c protons?

  An atomic nucleus has a c.yh y8h/0h myuharge 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, have charge 4 nt7,vzti:p i0ub5vuvalues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric zitbt,vi:vu50np47uforce between them?

  A 1.0-C charge is 15 m from a second ch3rk 0fd8s8c69mu+p j 0naimx targe, and the force between them is 1.0 N. What is the magni9tfkixsc 6a mr3mn0+ 8d 8puj0tude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How f6uih uz yop c:i.ein*)in2tgo /q3g2;j/ xf(oar apart are they?

  The force between a fyt 8*pr7sx-e fk6lo3.o;tiptvvii/ p +4 g;c$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cmpc/tb;mv/ ) jd apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the t//b vmc jpd);electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axisto7 hqnxas t uc4o)830. The first charge is at the origin, the second to the right at x = 50 cm, ant7sa) 8x4n3uoho0q tcd 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 f1+2mbyz4hn/fhk5+u rqm wk4t:hs2c 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 mC2tf4+n b /21hr4h:sw +qkzumcf5hyk m 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 at the following positions: Q1 = 2.00 mC at x =1i.qbpi5/8r eod)vpd o8yj /8 sc)c ff 1.00 m; Q2 = 3.00 mC at x = 0; Q3p bcq/8 i)oj1p 8cf y5soefidr/)vd8. = -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 i8cvmz5 s9a c05f pgps.s 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 acts on the center charggs8v.a0mp 9s pc5fz5c e if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.3dv jzv aac82zm/(w*8 ,ftgx2p0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude vxpta zz82g (mc w/jv8df*a, 2of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0q b 5r)lsvag.3 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the n )vgs5. bq3rlaet force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equi qwyr 5xv(-jh7lateral triangle which measures 30 cm on a side. What is the y jw(-h5rq7vxmagnitude 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 p qmb1z mbw0u- x87rzj8hvx;8 goint, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic fbqz 8zvmg-8hx m7w1xr u8b0j ;orce acting on it would be zero?

  A +3.0-C charge is at the origin and9n/qtk/ au86 w)vz oub a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net forcetbzw//8 kqu6)o9va n u on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = h9/c;a t0sd9woo7gjgu2zd e12a. Where can a third positive charge +q be placed so that the fc7 a; e h1s2dg9 t0ujz9wod/goorce on it is zero?

  A copper penny has a mass of 3. gvsw,+ot. 08kvf2j sc0 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 yr;eu-ui 1;gpagainst the force of gravity by the attraction of a fixed proton someup;egr 1 ;yi-u distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a covlt;c..l6 ql-.el n tdmmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the nl.ll;6 ql..cvet -td angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. hxsta y*e3* 4necj/ok,szvb(jbe ;,) What is the magnitude of the electric field at a distance of4x t,z**b3e js,hc nk(/ b;)jvesoyea 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fie3o)u/wvcyl ;at *ei n4ld at a distance of 1.50 m from a 50.0-nC chargey uw )o3a/;li*ce4vt n?

  A 5.0-C charge is 10 m from a small test charge. Wegn h +7 ew1,ygx7 v2mv.s)irkhat is the magnitude of the electric field at,yv7 x.)kges7 +1mhv ire2nwg the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of:i luls:b5tf5 the electric ft 5s5bl ulf::iield?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude5 e87ct)zbd tji- lt+u of the force experienced by a 1.0 nC charge placed at the location of the test c c il587+tt-j)bte zduharge?

  Two point charges each have a value of 3.0 C and are separated by r wnctfm;96ke 1fq3 lne: 3e/sa distance of 4.0 m. Wha3 :kmfef e q ws1rne396/n;tclt is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a met8m 4xqp7xnjq; er stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 nmqpqxx7 8j4;cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter st 0t/eib ehmm*8ick and a -4.0 mC charge is placehe/m bie t80*md at the 50 cm 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 place cbgnukn-s/;zw+ ,fw7c0r:4 cg 7kapmd at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between w,-u/ anpk47grf mw0b7nc+sk zc:c; gthem?

  Three 3.0 mC charges eqi(u80xr1 w y)hss1care at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at t1xs)r is1y(h0u 8qc ewhe center of the square.

  Consider a square which is 1.0 m on +x u96c89ygv wo1r nwna side. Charges are placed at the corners of the ow6+cr98gy 9wx1un nv 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 mqa /,4l y4tqbsC when it is placed in a uniform electric field. What ,a4y/4t sbqq lis the magnitude of this electric field?

  A particle with a charge of 4x(:gka d, y .4s6lgxjy.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 field of 6000 N/C)s u j9d qlq9bo4z+0cy pointing downward. What charge must be placed on the ball bs)9 4c9 doq0 uyj+qlzfor it to be suspended?

  A foam ball of mass 0.150 g carries a charge of - q5 sx .iuz5yx/l/i9m1mcw wr42.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and dir/xi cls9m m 4.wyq1xwu55/zriection of the electric field?

  A metal sphere of radius 10 cm8pu av8s )1nat q sw/ -kgp3ohdhnuj-)4k0x/ d carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere'38 o8 /tpshg-k)pnqhdv1/anwud 4 sx- aj0)kus surface?

  A metal sphere of radius 2.0 cm carrieaqzqzzraw4gym --;yv: 44)p ds a charge of 3.0 mC. What is the electric field 6.0 cm from the center of vz -4:mq-qagz adyw z ;44rpy)the sphere?