State the law of cons i2i3u vbmo x;+ykg:ps6o f8o(ervation of electric charge.

  Is it possible for two negative hl .blw(24aezj.evt hu 74;rxcharges to attract each other?

  Is it possible for a positive and a negativeo7 c95:6mdak iwfdp.n charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glas8bbpb;aw4y3yi cj zv9w 6dqa.6dh t. 3 s+-tvxs rod acquires a positive charge and 3 azb6d8x-jby awwdv3hc pyq 9b;i+46. ttvs.the silk

  A proton carries a

  The model of the atom shows+rit 0 cn)rat5 a

  A neutral atom alwayo9r 5dq ux.))lfw:zmfyd/s6ns has

  An atom has more elect b*xkf2 drvrhj 3d5q9(rons than protons. The atom is

  Materials in which the electrons are bound ver.ls ,pwh9yozz8k f 0r-0 nhta5y tightly to the nuclei are referred f9p,t zla . 0w-h0yz okr8h5snto as

  Materials in which the elt p9s./z yy(3c7x )r xbskoxz;ectrons are bound very loosely to the nuclei and can move about free /y (r)xbxo;tyxzz9 s7ksp 3.cly within the material are referred to as

  A negatively charged rod is brouds: -9sk2ammw ght near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rodw29 sms- mdak: will be charged

  Sphere A carries a net positive charge, and sphere Bfg28g +qifcvaq:8--jl p 0ftl/hs w8n is neutral. They are placed near each other on an insulatef-tsg lphg l8v+/8: qcif82 na w0j-fqd table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pa+ qqavw7e-(e c;svy :ositively?

  An originally neutral zz 24vnc;5 /ujbz az-delectroscope is briefly touched with a positively charged zbv52/-u ;dznz ajzc4glass rod. The electroscope

  An originally neutral electroscope is grounded+qyr6p aa ) 6lmq)x/nucpw1 3m briefly while a positively charged glass rod is held near it. Aft)a l+q6m 16mnx y)cpuqrwap 3/er the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepa x/s4*utw*e(hi(g- .ect8 wqquqi ks 5rate. Then a negativ u st( ktsu8 eh4xw/w*g.-ie qq(*5icqe object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an ivkb :qt5v5f.(g0nh w 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, a witvg.5:0h vnb(fk5qnd 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 dc520v ,digd fq/h *pjCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are sepa.hr,f .9,iorweqj .vtrated by a distance d. The first charge is larger in magnitude than the second wi9r ovt,hq., re..jf charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed 9fxt 01duw1ltnear each other on an insulated table. Which statement best describes the electrostatic force between them?wtdtu011f x 9l

  Two charged objects attract each other with a certain force. If the chargrns2h-gk5;bobn1 6 gces on both objects are doubled with2gbn1co 5rg;- bhk6 sn no change in separation, the force between them

  Two charges are separated by a distance d and 9s vz-sj m3fq.exert mutual attractive forces of F on each other. If the charges arfjvs q3 -9sz.me separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What hap/:ix qgow6c:mbjy4 so6 s 0.otpens 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 original val4/bsg jo:cx s6. o:qmw6io0tyue? The force is now equal to

  An electron and a proton are separa9 ay(- azs0xvvw vzf29ted by a distance of 1.0 m. What happens to the mag0 (2xafzy wzvvs99-av nitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated bb33oi3 +; q )5d)xdvcpkutsh; (nucgay a distance of 1.0 m. What happens to the magnitude of the force on the first+akv;ntd ;hbou 3u ig()sp33cd 5x)qc electron if a second electron is placed next to the proton?

  An electron and a prk+ nuqau ,/z4qoton are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the e a /z+kq4quu,nlectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center;kh)o6v iwz*yq zs t 8.yf:6a60hijjf 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 th *fh ;sy6y6o z0qt.k8hf wji)vj: ai6ze 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 equilateral tri,c rmagv,*5ixgk7/kv angle. 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 tgm,vv *kka /7c5xgr,i he 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 not a vecto- 6,tnpo*x1f). gqjp qmmqt4fr?

  At twice the distance from a point charge, the strength of the eleklyt*fplr74l) a, b8z ctric field

  Is it possible to have a zero electric field value betweez+j*uwfz(v ,dn a negative and positive charge along the line joining the two charw zj(v+,u*zdfges?

  Is it possible to have a zero electric field value between two positive chargeobc./;dlv d 9es along ;l.9d vbc do/ethe line joining the two charges?

  Electric field lines near psitive point chargzc9 zn*e/e59sunf m3 wes

  The electric field shj4(ia5 gokoe .6n( p-qcw -u1ahxef1lown

  Can electric field lines intersect in free87(/z opajiw8va; ez a +sst.o space?

  A solid block of metal7n y,8)ujs jipk:)wrvy :uqp. in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the ui)j k7w,pq:j .ps8vuyn:)y rblock's interior.

  If a solid metal sphere and a hollow metal sphere, qbb,(xj0wd c of equal diameters are each given the same chaqwx0(b d b,c,jrge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum ue.ro94wpy5r rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the blockyr.5 9prewo4u's top surface?

  If a conductor is in electrostatic equilibrium near an electrdo.yzyb/z 1i70m oi0/f9 cwckic charge

  A positive point charge is enclosed in yve0 kp m;p8e.a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point v.yk08 ; eepmpdirectly above the hollow sphere has

State three properties of conductors in static equilibrhtlrtyh2w v2 : j,4xx6ium.

State Gauss's law.

  The charge carried by one electr )(+q -p7fodsp *hfxktg s71k ipd*w4aon 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 +2.0o)uy3 o*z96jp j-juoizx; m)i0 mC. How many more protons than electrons does this pio9jj)xi;zjo-uuz* )mpo6iy3 ece of plastic have?

  What is the charge on 1 kg of prosvb 0g x.(-aqy5 i2jzetons?

  An atomic nucleus has afc7;nj;yh7 up.w)4u 6ic jnyr charge 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 valuese 0t60i6qeu tu79t wns of 2.0 and -4.0 mC, respectively. What is the magnitude of t67quit6ee0 tws09nuthe electric force between them?

  A 1.0-C charge is 15q+f/a t- dpa(kt*-da t m from a second charge, and the force between them is 1.0 N. What is the magnitude oft-d* p-aa /kt(td aq+f the second charge?

  Two 1.0-C charges have a force between them og/it+ fka.jh uj- i9y2/za :cvf 1.0 N. How far apart are they?

  The force between a (w:fntkoa+fuh k -10x$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1lf.fg ,+h ii4e 0q tx89ryf4mc.0-N force. If they are mofm 8fic4,0e4l9tr ih+ gyf. qxved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed onw;k5 a /x;i4fx+yb zckc7mc3r the x-axis. The first charge is at the origin, the second to the right at xx cb ;4c+;3 fa /kykrzcm7xwi5 = 50 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 of +2.0 mC is place)f 3z0 .n);foov llrdfd 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 the charge atf3l d)zl.;o )0ffnvor the origin?

  Three point charges are f+9zq xk 04z7)c cqbollocated 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 t7)l9c c zx zfqbk40q+ohe force on the 3.00-mC charge?

  A point charge of +Q is )ql/pb(t djc,c 6pdh: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 ttcjphdcd:(bqp)6 , /lhe 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); Q2 = -1.0 nC is at (0,93-iom um m -j9wtvd m0la2kj9 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 0idvlo2wm9t k m 9jm-3u-am9jnC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 0) / dau/higbgm); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0g g )b/dhi/au0 nC charge?

  Three identical charges of 3.0 mC arca2v(fin r f7efr 97h3e placed at the vertices of an equilateral triangleirfanr( he72 9cff3v 7 which measures 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 separatedf.b (8r- p uje 0gmc c(dj0dye-s7kv9o by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it e 0jdy cf7 8p-mkdovr bs-(cg9j0ue.(would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x b5s ,t-qym x*e= 4.0 m. Where on the x-axis can a third charge be placed s- tb, y5mxs*qeo the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed*(vhrkhjk .ywwt0:g 3 at x = 2a. Where can a third positive charge +q be placed so that the force on.jgt0khw*( rhw 3vk:y it is zero?

  A copper penny has ag.nxrwlg (0h / mass of 3.0 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 of gravity by the attra/5 8ayoj5r9vs fq nm)yction of a fixed proton some distance above it.mv )n oy q55srjf/y9a8 How far above the electron is the proton?

  Two 0.20-g metal sphsp.wkjmsl 2 u4 zmfn2+fp3w :.eres are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, snuk w2l.smmjzwp 2f.3f:4+p 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 +406ik n6) o)y*rpu yo uujsmr,)1e. What is the magnitude of the electric field at a distancrmu)*ynpsk)y 6u i61 ou,jor) e of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distancp m ju2 akv hrl1,rno(6j9,rh9e of 1.50 jh v1an h,rj ko ,mr62lpr9u9(m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnituqs0ku9*16 kh lv o2olhde of the electric field at the location of the lhkvk0*9u 61 hq lsoo2test charge?

  A 5.0-C charge is 10 m from a small test charge. What is(;vt -eaopm*v the direction of the electric field-vam ev p*ot(;?

  A 5.0-C charge is 10 m from a small test charge. What il wk8. 07yisvk +bn-i 3eqmer1s the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test chargi 3sk+e.e80qln7-mw r1byk vie?

  Two point charges eaxhy.urq+ gr80 ch have 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 betrx+ug 08.rqhy ween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick andunz y m1b6tqa-( ocotgo+9umd52o* ,l a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 zq2uu5gt odo6o*l c9-y ,1 a +motbn(mcm mark?

  A 5.0-mC charge is placed at the 0 cm mat4/ejw2q 3xnla3kmf w5lpno0 w/p 7e.uujh82rk of a meter stick and a -4.0 mC charge is placed at 27h3 x0nwwk w5e8/3aeu p/q4ljlmp .ft2jo unthe 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 plefnj0)f e9+xpaced at x = 0 and x = 0.20 m. What is the magnitude of the electric fiexe+) j90f fpneld at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squaru2cac o.l6g+a:vo; se*/qopie of side 0.50 m. The last corner is occ;iag:cl /6*ovo acq o+.pues2 upied 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. Chvxfmkf,*et+jwl3j4n.5p0tb j : qf f/ arges are placed at the corners of the square as folfvq 4/w5,t*f 0nxjm bp.ejk3:f+tljf lows: +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 o2f atj)th)el. f 5.0 mC when it is placed in a uniform electric field. What itae .f)2hjl t)s the magnitude of this electric field?

  A particle with a charge of 4.0 mC has aw71uinw;a:g*d2 jfiq 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 electricj* 3l:0a7 1 vdmnh-fsvtepq5;k8lrsu field of 6000 N/C pointing downward. What charge must be placed on tdf :r3l8hmjs5a-qt7v kp*v ;e10nus lhe ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge off)nv0wv; t)v ; ygp-tk -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are tht ;)wv;kynv )-fg0vt pe magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries83f gae5oxef t1y,) gr a charge of +2.0 mC. What is the magnitude of the electr) gtfa1ee5ogxy, 83f ric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. bfzag6p7yi-iy,ak *)What is the electric field 6.0 cm from th p 7gi*a)zyik6bfa-,ye center of the sphere?