State the law of conservation of electrvmy.9 w9 .capc,ee n4k;nzgk*ic charge.

  Is it possible for two negatitv6 c 6eh4g g)n7*ie74t hqurcve charges to attract each other?

  Is it possible for a positive and a negative chas-7jpvd/8*h e ,dflwy6f2k clrge to attract each other?

  A glass rod is rubbed wimhi4/ nsvm+a* th a piece of silk. During the process the glass rod acquires a positive cham+h i/4 *svmnarge and the silk

  A proton carries a

  The model of the atow.a hy6b clo61m shows a

  A neutral atom always h5 .uqwb) y1rioas

  An atom has more electrons than protons. The ato4 typx8xy6qxurk p+z: 4rm9:w m is

  Materials in which the elecf3 k(wzisvw6nk)r/1 .rhm fq 7trons are bound very tightly to the nuclei are referredwmrf7r1k 6f)ivk h /3nw.(qzs to as

  Materials in which the electrons are bound very loosely to the n.s6(c6wj6-kua7lz, ohb 4vf qlyp2io uclei and can move about freely within the material a-zi h6 lv,csl .jaw6 2b7 ookpfqu4y6(re referred to as

  A negatively charged rod is brought near one end of an uncharged metal l+ qinxe0s;0 eni:ucx 2*k ,xkbar. The end of the metal bar farthest from the charged rod will be charg*i2qcsu + :xel ;0xenn0ikk x,ed

  Sphere A carries a net positive charge,m qo 1/t bz-m/ipz(9vzse pz++1(drzv and sphere B is neutral. They are placed near each other on an insulated table. Sph + zz(bo dq/i+psv9p(rtez1-/mzzvm1 ere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?7;; yppo5 9vranfax(0+kw a k3fqgn,m

  An originally neutral electroscope is briefly touched with a positively 1o8o/g )zhq excharged glass rod. The elz1g/8e oqxo) hectroscope

  An originally neutral electroscope is grounded briefly while a xhv9myl 172kv positively charged glass rod is held near it. After v7v1x29yklh m the glass rod is removed, the electroscope

  A positive object touc:)dcvdchqzf79 )bf; ihes a neutral electroscope, and the leaves separate. Then a negative object is brouz9i7 d d;):vc)cfb qhfght near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated p 0ys.aso 3+a m(q94le6fghwftable. A neutral metallic ball rolls straight towara03+ 9pomgswq(lf haf6 y.s4ed 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 ball?

  Charge is

  What are the units of t7 tdkz3j/-ka/n mp cmsd.*r,w he Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charpwj81) uu i l2e9sdex7ge is larger in magn ujpe )w8 i9u71lxs2deitude than the second charge.

  Sphere A carries a net charge and sphere B i/(* e zjk.al+ i-pajcys neutral. They are placed near each other on an +y/ i-ze(ja.p*jl ck ainsulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a ce;eb-hr3sd 2 4 c1-yuy; -bjqp dsali8vrtain force. If the charges on both objects are doubled with no change in separation, the force bed--;c -epy ;b8314qrj luadybs si2vhtween them

  Two charges are separated by ahys31 c-+ rn oyv6c6i*odmz y- distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance od voc1 r+ ioz6hc6*3ys-m -yynf d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to bmo.tpc xz9(+ 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 value? The force is now cb.p9 mo+ tx(zequal to

  An electron and a proton are separated by a distance of e gu+pv97fl l91.0 m. What happens to t99+7l ufp lgevhe magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dil++z 2d7 5k wygxjv.j5zued k/stance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed jkwge/5 vy.kd jd2l+uz7x+5znext to the proton?

  An electron and a proton are separated by a distance of ; 01wcs rxf 3pmb0qv+mifyq6 .1.0 m. What happens to the size of the force on the proton if the electrpxmsmr0yv; c +qw1.qbff 6i03 on is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of ax f 6kzvd/ r4kmr o.2khj.lvgv93p1 g7 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 ov36gpo1vdg ./ . kkv h9zkl4rjx7rm2 fther 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 trianiglv1l+,* rt.ftmo -d,wy4c e gle. When a second charge of +Q is placed at one of the triangle's vertices, al rtvofcy.w- dgm4+ltei, ,1*n 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 placed at one of the other vertices?

  Which of the following y 66 s,etcq 6lh (0hbs87qkpeiis not a vector?

  At twice the distance from a point charge, the strengt043t2xdv vcuyh of the electric field

  Is it possible to have a zero electric field value between a negative an79wh zsg 9i iqp15lhc9d positive charge along the line joining the tw lqw1h7i95 ischp9gz9o charges?

  Is it possible to have a zero electric field value between two positive .x 60fh* nuoo-ecrc.acharges along the linchoua fe6x* .r 0.o-cne joining the two charges?

  Electric field lines near psitive pointk j+u*bpj4: 9zxcrt 9t charges

  The electric field shown pn0)wgl slevd v-b:57 1 bm0yz

  Can electric field lines intersect ilcgtlr:(ebpu1j jov7,5 q*4kn free space?

  A solid block of metal in electr xrvt4a:k ;9 h4d9tmiw1 oeiuk7+bw*sostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's inteu; 9m: w 9rswoke 1*4hdabvti4t+7ixk rior.

  If a solid metal spherf1exjkrrmu7v0 8-2a 6ce x.spuq*f 7ge and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) f kvapu8xgs7c e7x21m*0 uejr.- f rq6midway between the center and the surface is

  A cubic block of alumizzn6878m x5)mx27tp)jxo k m-engir bnum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning z nrxgnokm) x em6tmb -j)x287pi85 z7the charge on the block's top surface?

  If a conductor is in electro0 v9rqt c;:tbbstatic equilibrium near an electric charge

  A positive point charge is enclosed in dy xy7:1pllb(m9+ ycn81dn1 cm5p dvl a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the e1n5mpcl1+:l ddybyx 8v(ym9 cdpln17lectric field at a point directly above the hollow sphere has

State three properties of conduc;k2if h .0zzn xsg4aj+bg7t7 m. -cqhktors in static equilibrium.

State Gauss's law.

  The charge carried by one electron (w0zff6p oif70l ymy q4) wa.cis $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net chajz6rc,a6mbyn:/3spt rge of +2.00 mC. How many more protons than electrons does thsrmytanz3, pj :6 c6/bis piece of plastic have?

  What is the charge on 1 kg of pm 3xe.j/jml.n rotons?

  An atomic nucleus ha2w7 )pn 4en z*4iutryvs a 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.dcepkxmqxe2jv96, t02q: wi 95 cm, have charge values of 2.0 and -4.0 mC, respectivevc w9ex: xj q2die26kmt09, qply. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from az8,l.q x*ci 3i j/vcpo second charge, and the force between them is 1.0 N. What is the magnitude of theozcij/p, c 8.i 3v*lqx second charge?

  Two 1.0-C charges have a forcej)/bh3rh+n i8 s hbdtjrgp * w4u;m081cgp,sy between them of 1.0 N. How far apart are they?

  The force between a 2sw8ylhii( y bdo /l9*$30 \; mC$ 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 1.0-N forc zwhi+.bp4o8t e. If they are moved to a new separation of 8.0 cm, what is the electric force between them?4w tp.bi+oz 8h

  Three identical point charges of 2.0 mC are placed on the x-axis. z5x0wu e5 2ezn es7t-i 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 of -e0zweuxeit75 z2s5n the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. da0 u :zgwk/)+: (ynk-iaml6uimvdv8A 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 10(gia/8iw -mdn)yd:uvv6a kklu:+0z m0 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: xall x,kco3j1dk e5 7*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 the force on the 3.00-exj lxco5klk3 ,7d1*a mC charge?

  A point charge of +Q i gu0 :pa,ve+-he ku/ajs placed at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed th-au0:,e gpkvu /eaj +hat 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-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at2k3c0dj x3 v96mp/o(k qde nswbv y-i: (0x-wk dvni2m(3s9: ep b3j6qco /kvdy 0, 0). What is the magnitude 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 = 5.0 nC imt oc61y*. 18rvo ne3pzmg: rzs at (0, 0). What is the direction of th1.emyvr cm8r*3p6o :zn1zgt oe net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of +m,qi iua: gj9an equilateral triangle which measures 30 cm on a side. What is the mai,+jq:ag iu9m gnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Qf) w b/x5wirraj /ud.- and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of - /xr5dwfi.)/wur-j ba Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge o4ip az4k.)mhl1tye4 is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it 1ky .z4o tmlepa)i h44is zero?

  Charge +2q is placed at the origin and charge -s- )*c4)s+nymeg)qrqpm,f r cq is placed at x = 2a. Where can a third pcrf)sqgm 4eqn)* -ysm,c r)+ positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 1zpn cxit6m38 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 5 3sd 5hf 4fevryml,acpd *24*(aauipagainst the force of gravity by the attraction of a fixed proton some distance above it. (yurf2p* pfd4lci4sha53a vm,ae 5 d* How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduc7:rfooe8kr) xting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion for 7f orr)8ek:xoces them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a c45n /bh6 avieqharge of +40e. What is the magnitude of the electric field at a distaaib5q6eh 4n v/nce of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distey utmwrgzww;0reke 9(-8( 2p-p k8poance of 1.50 m froprtruk0w-(p9-wmgeky8zp8o;e( w2 e m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magniz0p yfpakog ylayik)49)(n6ri3m n7vf71ay)tude of the electric field at the location of the test ch0l)nf77irk)1fa py 3nya iogyy9(p6 )zmavk4arge?

  A 5.0-C charge is 10 m from a small test charge. ea6x,rt dztmj2 qevz z4abn*:5*c)+qWhat is the direction of the electrj6)* zzma*cn+ 5a4tq2 dbqtrex,ev z:ic field?

  A 5.0-C charge is 10 otqvcf9ypjnut + zq.a;5u4 :0 m from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location jvq un:+qf 5y 0co9.t4puz ;atof the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distan q/uc rs t1siuf7,s q*ym.l+6d8xbc4l ce of 4.0 m qsucrq . t6*mfybi+lx s7/ du,lc814s. What 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 meter stick and a -4.0 j5z3. j c k0fdc5nofa (79rmbrmC charge is placed at the 50 cm mark. What is d j7ramc( rbfkz5o .93cj0 f5nthe electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter s-57lj bs rv6i7jq 4duxtick and a -4.0 mC charge is placed at the 50 cm 7 x6qlirb5jus-v4j7 dmark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC a8rx g:0d2gjwte 41d ujccd4s) nd -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the jc1g ddwc4ue0xtg8r 2:j 4d s)point midway between them?

  Three 3.0 mC charges are at the threw6cvke7z zzfg. j .b,-pwz 2-ye corners of a square of side 0.50 m. The last corner iz bjk.-.p y72fwgzv6zwecz, - s occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 jjtq+d+mgh /:slzj)5 zmpd,-m on a side. Charges are placed at the 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 j/m)m + z5l +jh dzsgpq,-:tdjis the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC w ,zt y4dxfxnw6jjv.:da +9k1when it is placed in a uniform electric field. What is the magnitude of this electric,6+kf j ny9.z xddw4vjaw :1tx field?

  A particle with a charge of 4.0 mC ,y v c0x)2/w)iuf snoe,,ptca 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 mald:h wv1 cw1y7ss 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge hw:d1v1 7cl wymust be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The bark4ogm)o9 -,v rji*ptll is placed inside a uniform electric field, and is suspended against the force of grat,r)-o9r4jvikpgom * vity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge: cq )gnwtzh(-ftg w97 of +2.0 mC. What is the magnitude of the electric field 5.0 cm fn hgw)tqg-ftw(9: zc7 rom the sphere's surface?

  A metal sphere of radius 2 -oni93egq *zd.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of in9g* q3ezdo-the sphere?