State the law of conservation ttqkve7 (8p;gof electric charge.

  Is it possible for two nes3c 6hr snoizq55/,mt-lfj0r gative charges to attract each other?

  Is it possible for a positive and a negative dw8sb)g) /dd .ty58d6wrx gbb charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the procy2qv y 0u5udw(ess the glass rod acquires a positive wq 2y0udyuv(5charge and the silk

  A proton carries a

  The model of the atom shows8)4x v wdl+one a

  A neutral atom always hr1b8 f v+m7oujas

  An atom has more electrons than protons. The atom )): v (toccpisgt e;:awalb2,is

  Materials in which the electrons are bound very tightly to the nuclek)p:*e dfkmdc 6 4kcc*h(lhqb .org6. i are referred todclpr*6h )kd: hk ckce(m4o 6.*fb.gq as

  Materials in which the electrons are bound very loosely to the * h:a8 5mlvqbu5ttx6knuclei and can move about freely within the materit* :5vbuxkal 6qh5t8mal are referred to as

  A negatively charged rod is brought near one end of ay w0s2vycr8tsl a d,2l33s6 opn uncharged metal bar. The end of the metal bar farth3l2o03s2y wsl ad68yprv,tc sest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They 4 z/ vgzs3abo;are placed near each other on an insulated table. Sphere B is briefly touched with a wig4zs o/bazv3;re that is grounded. Which statement is correct?

  How can a negatively charged rw-9 r s1s48clymoe e,uod charge an electroscope positively?

  An originally neutral electroscope is briefly tkpc83mh4- 3 : c6 mmu,/mzc-w5j .skcxhqzpwhouched with a positively charged glass rod. The zh s:ju4,zph.k53 mcqmhkw mcmp --8c 36x/cwelectroscope

  An originally neutral electr2bin dtglg )x3+6 l,oboscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscopbxl6l,g +o2tgd)nb i 3e

  A positive object toucku 6/ clyx3q8ysv o x+q38eaec 5g8dn2hes a neutral electroscope, and the leaves separate. Then a negative object is brought near the sou q/c dy 83 eqcy6g+25a8 xkv38xnleelectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A n(;aedam/.*s k b.rcmeeutral 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. What is the final charge on each ballrc.sm a(ee *;dka.bm/ ?

  Charge is

  What are the units of the Coulomb cons)q gmf z)7juqg5k4ip m ;w8a+ptant $k$, which appears in Coulomb's law?

  Two charged objects are separated b-4q)per ; ji. ;gytusny a distance d. The first charge is larger in magnitude than the second chargeq.ys;r-e g4; n)jutip .

  Sphere A carries a net charge and sphere B is ne/(e9tb etsk( .dj1q ymutral. They are placed near each other d/(mtj(bse y .1tqk9eon an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If t yr ;/r72)sqj kdbci4che charges on both objects areicr 4djk r;/ycb2)s7q doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutua.u7;q,tcbt wvl attractive forces of F on each bcuwvt.7,tq ; other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other witdygj o 92 kyzr/c)q:mb*k*q ;uh a force F. What happens to the force between them if one charge is doubgo;cqd mry* k92*quz: bjy)k/led, 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 distance of 1.0 m. eg)o9+ pkolk dhd/7o 1What happens to the magnitude of the force on the proton if a s7k/+e loodk g)od19 phecond electron is placed next to the first electron?

  An electron and a proton are;t5 o7 +hipmha separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electra 7;phmho5 i+ton is placed next to the proton?

  An electron and a proton are separai rqlyol l,6h 227zc1 fm+gnr2ted by a distance of 1.0 m. What happens to the size of the force on the f2r2lg17ilo6z+,ql n2yhc rm proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at iq1kng.kh(0z the center of 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 k. n(zi0gkqh1is 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 aa /-uve)dqym*;4d unquilateral 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 cent)q- uy*ndvu4dam ; a/eer charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followie+9asxn;p vjbc(*pkfbu9. l2ng is not a vector?

  At twice the distance from a point charge, th0sh yk+ d))*jg4qwiz je strength of the electric field

  Is it possible to have a zero electric field value between a negax3v8a 3ibjq1 jtive and positive charge along the linei38x3ab 1jvq j joining the two charges?

  Is it possible to have a zero electric fi* e: zvv8(3 hacz.gc ams,zw6reld value between two positive charges along the line joining the two chargesv *gvz8, zw.s3:ccaz ea6r( hm?

  Electric field linesgy* r:cldtwf6*y o* o*oalg+ - near psitive point charges

  The electric field shownv*lxo7u3 y f4l

  Can electric field lines gbj8mlu f5-2/z ix ;c:wjafg3intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform electpob ox; bv4-z)ric fieb oobp-)x ;4zvld. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diac;+sbde l-:1p jvj p-ometers are each given the same charge, the electric field (E) midway between the center jsbdv l p jpc+;e--:o1and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifonky -sr(d)b8e rm electric field is directed straight upward. What can be said concerning the charge on the - yk8se)(nd brblock's top surface?

  If a conductor is in electrostatic equ: b;2+pr qx0bzwsu wi6ilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groqwx5 o/w(hd0v.- nvq vunded. As compared to the case without the hollow sphere, the electric field at axdwqq.vov h(5/v-0nw point directly above the hollow sphere has

State three properties of conductors in sta ixxg mtv(:egt lyuwq1;l ms*.+k* z0/tic equilibrium.

State Gauss's law.

  The charge carried by one electron is a2rqje n, m5axzdd8tc:/40))yikev 5tluk.s$e = -1.6 \times 10^{-19} \; C$. 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 man ioif,*i2v j;zy more protons than electrons does this pieceii*zov2f, ij; of plastic have?

  What is the charge on 1 w 0hi fj:6mtlo 0em:-mkg of protons?

  An atomic nucleus has a chargeji55yt/gg/u/0 t f,gzv so;ut 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 values of 2.0 ( a(/iuhydevv: /;j ,9fbjr atand -4.0 mC, respha/y/,j j;u :e9ia(fdb(vrv t ectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 mz k2patw0p)e; from a second charge, and the force between them is 1.0 Nw 0pae);kzpt 2. What is the magnitude of the second charge?

  Two 1.0-C charges have a force betweev 3gcny6vjx aznvalu-7n4nk8728fw( :jg.t an them of 1.0 N. How far apart are they?

  The force between a n .,c+:z jjg(jvda0rk$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience 34 5;b( lrobhcco/doha 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the o;/ 5r4obc(hcbdh3loelectric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first cux,5 v-;c fgpxharge is at the origin, the second to the right at x = 50 cm, and the third is at the px5 x,-fcg u;v100 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 of lri92 neud4g x:)w +z8u:fiof+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 thelxi9ui+n)feg8zdou4 r:: f2w charge at the origin?

  Three point charges are located at 8)kx k,m dx9yf8ooi*p the following positions: Q1 = 2.00 mC at x = 1.00ofmk,k 9x8ox*dp ) i8y m; Q2 = 3.00 mC at x = 0; Q3 = -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 is ppjj 7t,u5w5w ulaced 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 j, p55uutjw7welectrostatic 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); Qx0eh lh33s8 2of3szkl2 = -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 s333zx8 es20ofhlhlkcharge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, qq9mboon4 x;)k7pva* 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force o; ox7v)opmk4q* b q9nan the 5.0 nC charge?

  Three identical charges of 3.0 ,hr32 :l t1jwz9nu0sjg piz* )edy2mpmC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force w djgmtn3j1z:h9 le0u ws)* rpi2py ,2zhich acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated byuj ) iy2dn:;f -li k(xa6d0dfb 3.0 m. At what point, on a line between the two charges, would it be possible to6biydn luif;d0k2)(:-j afdx 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 andgb+ 6y(b*88h: ,hyuhqwqtq6qt pf r9y a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third c+ hhy 6qf,r*qw6:g9bb8t8(y uq t phqyharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is plab+em :fl/uo, -(ojgno 6b7vzgced at x = 2a. Where can a third positive c gnb6fl+vz(o/b- : oe7gojm,uharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totai 9m2b4qt 3-iil; akbhl 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 to3 ala; bjy5higto51.he attraction of a fixed proton some distance above it. How farl tbay;h35a.oio5g1 j above the electron is the proton?

  Two 0.20-g metal spheres a(iv h(1mqnt0 vclu6o -re hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, q (vmhn0v6ctouil-( 1and 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 62j 7ebytvqjgb04a6 ojgg (ny 92sc4h the electric field at a distanas694hjgeobyg 7246(jc0 2qtb nv yg jce of 1.0 m from the nucleus?

  What are the magnitude and direction of the electe5wlr *1i so9 r(th.nbric field at a distance of 1.50 m from a 50.0-nC cha*h5 strei lnwb1.( or9rge?

  A 5.0-C charge is 10 m from a small test charge. What ir xn 5:dam)*p*gfif+os the magnitude of the electric field at the location of the test charge?axopg +5r**i:fndf m)

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the obvc nr8b,j(4j -2kvs electr ,n-scbvo jk r8bj24v(ic field?

  A 5.0-C charge is 10 m from a small test charge. What lzsu::)w4 uspis the magnitude of the fors:ulszw:)u 4pce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separak s*s0 e +4;qtz mtezdvfk,/brgric/* hro** +ted by a distance of 4.0 m. What is the electric field at a point midway b*zs/rreekz kcm*ob ;q t0*/di*s++ hf t4,gr vetween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark ofp8u3bd. qofmodan65 6 a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mapb d3 qd6o6m ua.fo85nrk?

  A 5.0-mC charge is place/+ jopnzue;) td at the 0 cm mark of a meter stick and a -4.0 mC charge is placed ao)u n t;z/j+ept 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 placed at h ex(b2 epua69zsl; f; )ih 5ec8fg0hyx = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway bet )u5gf piz6blf a9;s x2c(8;e0e heyhhween them?

  Three 3.0 mC charges are at the three corners of a square of s 0tjjq-3k/2ypwtn* otide 0.50 m. The last corner is occupied by a -3.0 mC charge. Find o0-jpy*t23j t wn/t kqthe electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at trq:;nrpt7 w0w2fg)(m ds j mi 9t0cer8he corners of the 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 magn0 ;m:wtjpr8 2q r0d)nsrig ctf79(mwe itude 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 elect8pi ksn4-axmq:mzf fe3u r9b7ige qm-l *n-:4 ric e97 aslienn8mi -f4r:3 - mkqgu4:-b zmf*xqp field. What is the magnitude of this electric field?

  A particle with a charge of 4.0w2 as4wqt-lp0.o x)w g 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 fiej*;xxm6oqicat9 -.m sd5 4id// ruis rld of 6000 N/C pointing downward. What charge must be plxcxi*dao js4i6. t; /q5 9m-r idrmus/aced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2:gt j)0s;xaiy.00 nC. The ball is placed inside a uniform electric field, and is suspended against the t ax;0g)jsy: iforce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm car* mv,,nb(s5p 74a3veuttoftcries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm45c s um(b*, 7, tftae3ovpntv from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What i8pxp yqt72s41 mpaq7ps the electric field 6.0 cm from the cen8 1psmyp2axp7p 74q qtter of the sphere?