State the law of conservationgeb9 f)/4 -b46s l ylmdxuae:i of electric charge.

  Is it possible for two negative chargx fe8 (9w 58g8re8qjy+ mymmwg/rzd1nes to attract each other?

  Is it possible for a positive and a negative charge to attract each i6gx c0ka 9ij6j+.t8c/uvqo g other?

  A glass rod is rubbed with a piece of silk. During the process the glass royv9+i ajpp*7p d acquires a positive c p*+7payi 9pjvharge and the silk

  A proton carries a

  The model of the atom show1kl ko,z vi vh 0(0r:,b ppzixvc93im/s a

  A neutral atom always ; ff11 x(eave a.3iy*bmf1mmkhas

  An atom has more electrons than protons. Tgca+ubueb987 q:h ms 2he atom is

  Materials in which the electrons are bound very tightly to the nuc tpc8h5v-a((j hje q9slei are referred to a jj89v-qcheh((s5 tp as

  Materials in which the electrons are bounppt/nez ,3cw*u:d a/ i2q:cird very loosely to the nuclei and can move about freely within the rp i: e /2qzw*t/dcpc ua,ni:3material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. zj3 k+o wtv2u-The ot2j+wv- zk u3end of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thexihmdt7 9j0*j7n7ss 7bj +kwk:ure6ey are placed near each other on an insulated table. Sphere B is briefly touched wbej6 +7mdnh kt*k0s9s7xieruj:77j with a wire that is grounded. Which statement is correct?

  How can a negatively charged roto +kazf6g1 i0d charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chby8coqh 29 ew+)qts4parged glass rp8s ch9 y b4)q+eo2qwtod. The electroscope

  An originally neutral electror73winpoy 00u7znm a5 scope is grounded briefly while a positively charged glass rod is held near it. After the glass rod i rnyw7z3 puain5m00o7s removed, the electroscope

  A positive object touches a neutral electroscope, and tpt6y hiyca.c7siqtq47 )- ci9he leaves separate. Then a negati siq7cqcy)9th tc-i76.yp 4aive object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on ahbp+it 12wy.1iaqi g36 mui+3kwgc*ln 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, g2+pct3b mg16h*wqi 1kl +wi uya i.i3and 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 Coulojf)d o o/6qsz6a z41qizt6g h9mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. )scmh *x f1fd:i/ c0wmThe first charge is larger in magn1cf:m)/ xc0 *imsfwhditude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are plac, z ;kmjjrxaq.;8+ khped near each other on an insulated table. Which statement best describes the electrostatic force between them+zr,;hka8;jxp.kmjq ?

  Two charged objects attract each other with a certain force. If (im oq 8x1putwj(ky (/the charges on t( y1kwijp 8xuo m(/(qboth objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutu,s(eel qvn z7h)t (da9al attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutt )aql n(7e,zv9e(dshual forces?

  Two charged objects attract each ot.o60nnyyo 95b5ln xdt8 rtaz f55b-q fher with 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 its ori55-5q0nynt 5 8ff96ozyrdlbt bxao.n ginal value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hc x7:vr ,co6.7a0h:gvn qshv xappens to the magnitude of the force on the proton if a :s rc hvvg :n.h6xoqca 70x7,vsecond electron is placed next to the first electron?

  An electron and a proton are separated by a distance ofcfh j7c *d1v mg+ovs+) 1.0 m. What happens to the magnitude of the force on the first f gd*m7+vsvocjh+)c 1electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of d j8c(qfedy.9 1.0 m. What happens to the size of the force on the proton if the qf j(dy98. decelectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cenu: a7ym-v r noppf++)uter of a square. When a second point charge of -Q is placed at one: )-faopm+unu+vrp7 y 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 placqnymz, e j1.y)nho)f ow17 3pved 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 plh .),11o)ny eop v7qzmnfjwy3aced at one of the other vertices?

  Which of the following is not a vecb+o ,ru (il flcm8z+5utor?

  At twice the distance from a point charge, the strength of the electric fiet c;oa+8 g+gwgu.0t;t5nb wto ld

  Is it possible to have a zero electric field value betvys0,oyah4/d .ci/l nween a negative and positive charge along thalh4c do/.v s/ yy0,nie line joining the two charges?

  Is it possible to have a zero electric f );jy:ou2+qrpsy( age ield value between two positive charges along the line joining t+rg;po )asy(:jeuy 2qhe two charges?

  Electric field lines near psitivk*e 74h,ynpa5: o0rbtdku4 w;fxc)jg e point charges

  The electric field sho s* pcily+0*q7t-zbspwn

  Can electric field lines intersect in free m; z6hmg5rqqx6rza 15y +( kawspace?

  A solid block of metal in electrostatic equilibrium is pl-6b k (7mfykucaced in a uniform electric field. Give a statement concerning the electric fi7m(-by6ck fku eld in the block's interior.

  If a solid metal sphere and a b yc5z5/ 5bhspemjm, qa3 04vrhollow metal sphere of equal diameters are each given tab555/revmy 3s4qhmpc jz ,b 0he same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rest0nyj7 ;pyd6kqpi/v u 5ar4da2s on a wooden table in a region where a uniform ele5ud 4qp0yjkir6;/a7pvad n2 y ctric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrosuxm 7) ;rd,q:dc /*dgyg ,k8cxa8uiedtatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow mr,.1dtk, s/sreayd0 jetallic sphere that is grounded. As compared/ , ded 01j.yarrstk,s to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three propertiesz,2r sjeig 8po/, 0epx of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron bc wmz )a.9) wm,/hy aw2wz)veis $e = -1.6 \times 10^{-19} \; C$. 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. Hzeopt e- ,h,u8ow many more protons than electrons does this piece of plasti oh-p,e8 ezut,c have?

  What is the charge on 1 kg of pj5b ecw g2;on*+ux ch-puuq58rotons?

  An atomic nucleus has a charge(be54wthoreon*, ktjv)+ h g. 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 valuj,n),tm e26yyl irbjtik 5 ,;xes of 2.0 and -4.0 mC, respectively. What is the magnitude of tjt,2rmnt,i 5 )xl; b6,ij yykehe electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1h : )sjamhre;ak y,.sm8y cmge2o5 i65.0 N. What is the magnitu 5: s8ogcm)maj6a;e.khe5,smyhiyr2de of the second charge?

  Two 1.0-C charges have a force between tysmf*j cou* clh8,od3oxq 6w+l 27r:k hem of 1.0 N. How far apart are they?

  The force between a wj3th klc9h30$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, h w w3ff+z)qa1experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betwe fwz1f)qh+a w3en them?

  Three identical point charges of 2.0 mC are pl5lcjwd96 y(ro aced 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 wdy5 j6(o lrc9of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 9hwklwf 1 *4peg 74roomC 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 thlp1okfhw*gerw4 4 9o7e magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are g7b:2r mv9bcylcpu+9 5mkf 7c located 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 t7y u2:bcrmmblc+g9 p vfk5c7 9he magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed oe: f+q:pc0wwat the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an elecw:c of+e0pw :qtrostatic 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 (0.3.a*qk52dp4yu3x8a;eeod xv j0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magn;e*a2 x x8kua y.d4pjod3q5ev itude 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 i cox;,qdz).pa6, v p3x m,wdb= 5.0 nC is at (0, 0). What is the directiodp i.,x;x z,,ba3v dw)cmq p6on of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 ;asiftx 9u:) pmC are placed at the vertices of an equilateral triangle whtaf9:up isx);ich measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charg( pw6-yvm vj+ges of +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to pl6 vj+wm( vpyg-ace 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 + lr/--37vi vte c24jdf.acphs y a8on09.0-C charge is at x = 4.0 m. Where on the x-axis can a thira ceyasjh .d -02 v /3rno8fci-vt7l4pd charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q 4u;1x6 p2kx lp: sabvzis placed at x = 2a. Where can a thirdlb42pv1u 6axxk:; pzs positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g4f: -+ :mvwagi d7 blfg,xqc):-dsnsc. 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 agaix 0 (2x4yfaabwh4o by+nst the force of gravity by the attraction of a fixed proton some distance above it. How far bh(fy+a aw44yxx02bo above the electron is the proton?

  Two 0.20-g metal sphw8dow2lntu( t.8p*70gz qlk h5u :pzoeres are hung from a common point by nonconducting threads which are 30 cm long. Both are given iden8uguzh k nw d.:po2twq l5(t70p z*8oltical 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 md tv xzk/an9b 4jabb2c9(ll- 3 m*dc*ragnitude of the electric fie/jnb -(42atm rdld*ax*cvz93b cb 9klld at a distance of 1.0 m from the nucleus?

  What are the magnitude and 0lw,dz3ys h 4zmi 3cy 2(rs9nzdirection of the electric field at a distance of 1.50 m from a 50.0-nC chasm9(40lnr 2,zwcyz dzsi33hyrge?

  A 5.0-C charge is 10 m from a small test chargee0(;mo uh)xtyri bg(1 m42vie juzv-2. What is the magnitude of the electric field at the location of thjb (e01m22oz4t ;( mvvygix)-u erhuie test charge?

  A 5.0-C charge is 10 m from a small test charge. What is thzkov.rm9tc ++dv* o: e+qw:inq pk*v(e direction of the electric field?qtmv.+k vzi k9w d::*o+v+q(oecr *np

  A 5.0-C charge is 10 m from 6fm6xz1us4vr*)m7ot 8jzm vya small test charge. What is the magnitude of the force expery* uz r8x)1tvmojmz6m476s fvienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each havewdg .. nfw/j*d.s*l8pw dn1kz a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway l1d.z gd/swjk*d nf*pww 8..n between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark8++mle: c+rim*ieub v of a meter stick and a -4.0 mC charge is placed atm+:8bl*c i+mi+ reev u 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 stick-, vy9l8qrx,r mdu8x p and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the ele,q-ld8pvr r8 9my,x xuctric field zero?

  Two point charges of +3.0 mC and -7.0 mC are place+i6f* acxw m8 qxl8nlaysjhml8 ::: q1d at x = 0 and x = 0.20 m. What is the magnitude of the electric fimf 8cx* qyl:: xmwn sh81liqjala+8:6eld at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sox-2bbozkr-fk) pu )9p -o.who xm1:vide 0.50 m. The last corneo1z- o.wxkpk)m -rb:h-u fxvb 2)p9 oor 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 pltec bm+.h: vr2lfg4z:aced at the corners of the square as follows: +4.0 mC at (0, 0); +rb zht l:c:e+2f.4m gv4.0 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 iss5( c4 wewtcl3 placed in a uniform electric field. What is ths(5 c lwtec43we magnitude of this electric field?

  A particle with a chzxotyu1k;n0nt :1o )cdbcs+3arge of 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 1hbcjd.;:ob s field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspe1: j d;.cbboshnded?

  A foam ball of mass 0.150 g carnger )rmfj 47l7-to.yries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agaj) or7nlt.-rg7y4 mfe inst 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 twz )/dh 5e2m-k +vtbuvhe magnitude of the electric field 5.0 cm from the sphevtbuhzve-/ + 5dwk)2mre's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. gqusvs,m uc/z-km,s-nlrcyn 4) 96v(What is the electric field 6.0 cm from the center of the sphenu 6/cs-gms )y,, rml4ucvq9z ns-(v kre?