State the law of conservation of electz;b3xc, z ncx gq1lwsw/3i,.rric charge.

  Is it possible for two neg (np04uxqf k1k ,t:omjative charges to attract each other?

  Is it possible for a positive and a negative charge t3xgy3m79.m jggvqod8 78 ra ioo attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gq)hc2 zm2:ks blass rod acquires a positive charge and the hs)2bmqc:k2 zsilk

  A proton carries a

  The model of the atom s.ryid katqm p5/;ogd 9 ft0sm(8vei04hows a

  A neutral atom always hacjiv/*jy5l 1tk8ai )(mhmoh g-cq;0ps

  An atom has more electrons than protons. Twv.najcz4:d :64kh pzhe atom is

  Materials in which the electrons are bound very tnzkec2u3q h(.ightly to the nuclei are referred to azqu(h.3e2nck s

  Materials in which the electrons are d9 m(mt2(whgno q0+h ebound very loosely to the nuclei and can move about freely within the material are r gh0o (+nwdetm9 mqh2(eferred to as

  A negatively charged rod is bro5fj*ag7 ivv /pught near one end of an uncharged metal bar. The end of the metal bgj /*av75ivfpar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B*u*0qolqhi 3 api 2:ywewa4u * is neutral. They are placed near each other: 2l*wya*ai*4q ipuh oue0 q3w on an insulated 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-j7( j*c3sd gejks ma; positively?

  An originally neutral electroscope is briefly touched with a positively )d+ 0; nwqtei/s iht3echarged glass r) +d0i/i tt n;ew3ehsqod. The electroscope

  An originally neutral electroscope i5p yhv ew6tm4b(6dr0us grounded briefly while a positively charged gla6 5hy4rb6pde uvt wm(0ss rod is held near it. After the glass rod is removed, the electroscope

  A positive object to )3 )z2uzfhxhtuches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What hap)u)zxt 2h f3zhpens to the leaves?

  A large negatively charged object is placed on an0ocr 6v0qe 7b.f9 erly 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 forward, but does not touch the negative object. At no time does either ball touch 70fv o6 qre9erlcby0. the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulompv. 7jour0h krvc41pt,g :z )nb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first char,czs25ej x j3lge is larger in magnitude than the second charge5jx, scl2z3 ej.

  Sphere A carries a net charge and sphere B is neutral. They are placed near eaclpz f:bfv06x 1h other on an insulated table. Which statem: pbf6zf 0l1xvent best describes the electrostatic force between them?

  Two charged objects attract each other with a certain forceoeg98y6j: atq . If the charges on both objects are doubled with no change in tq9 jo:6ae8 ygseparation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fombfrx57lz6y)n3p 0tzojxg.q3 l lz98 rces of F on each other. If the xo60r.3lz8zl j 5mpz7 yqxt lf9nb3)gcharges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. Wxz,w*v7/khhoty zyl-s(4 1e.* iumpfhat 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-fmo eypv 1h- uzt*yh(wk*ilx.4s7,/ fzourth its original value? The force is now equal to

  An electron and a proton are separatdgl/n9 8h*5ho g vs8lgyrkg),ed by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the f ,gg )5*rhlhld9g gk o88vysn/irst electron?

  An electron and a proton are separated by a distance of 1.0 m. 8 nletg 58l5jfWhat happens to the magnitude of the force on the first e5jftnl g88e5 llectron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0xhp:ze,b 7zq0 m. What happens to the size of the force on the proton if the electron is moveh 0:,z 7qpxebzd 0.50 m closer to the proton?

  A point charge of +Q xd7n)i4; a aagis placed at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed a;xg 7a)dnai4 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 centroi o2 -nuw1kff ut)u/6osd 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 onu) o6ufuns-wo2/1t kf the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not 50e, +hnyhuv ja vector?

  At twice the distance from a point charge, the strength of th.iif 2kymx(y9 e electric field

  Is it possible to have a zero electric field value between a negative and6-ijg d)sb uel;c3v 4zsi9q3l positive charge along the line joining the two cjcz9ei iqs33v-sgbud)4;l 6lharges?

  Is it possible to have a zero/b* 3ld5*q 5oixz:p jc dhdys jdz:(q2 electric field value between two positive charges along the line joining th *q ypjz/2qc 35d*zjs:: 5dhodd xi(lbe two charges?

  Electric field lines near psitih tyh uxa.sq ,s.n48w3ve point charges

  The electric field shnjpppwr )hjk,3,);ua own

  Can electric field lines intersect in freb22 1hkzwt4jp4 sy r7ntf ,bey3-s,pne space?

  A solid block of metal in electrostatic equilibrium is placed in a unifok;bic:vqs5eai h .7 m;rm electric field. Give a statement concerning the electric field in the block's int;:avie7hbmkc; 5q. iserior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are )mk *r.cm6 i+ )o3dko ugmaq4ceach given the same charge, the +koq aurmim6g3) mocd*4)ck. electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wherec: zj 3ie;ye.j a uniform electric field is directed straight upward. What can be said concerning the charge on th.ezj3;ij yec:e block's top surface?

  If a conductor is in electrostatic equilibrium near an electric charmc.:n o/rkw)v y1ru/vge

  A positive point charge is enclosed in a hollow metallic sphere that i yuv:42/fgim gs grounded. As compared to the case without the hollow sphere, the electric field at a poi /vg i42mu:yfgnt directly above the hollow sphere has

State three properties of ai zih; n3i7uecy( ,7xconductors in static equilibrium.

State Gauss's law.

  The charge carried by one electrrt8o /0linz)s5s0 z5 t klb6odon 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 mor r5zq,zz7 frm(i25hkrtllc3 n w0v,g3e protons than electrons dor753nl2tq3kzr ,,wvlg c ifz5m0r( zhes this piece of plastic have?

  What is the charge on 1 kg of protons?q2h8h pwg rdv 1s:7 *e6dlnuqx; -asx8

  An atomic nucleus has a charge o/y er);us. abc h/ oj9h0cai:4vl4nllf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sef;trl j ::2zw.6na htiparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respz ;2tljitf:6 .anwh:rectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them p (7 (t4o,h*qeqjxpsk is 1.0 N. What isqs4e ,p( jhxtk7q(p*o the magnitude of the second charge?

  Two 1.0-C charges have a force between them ofgj aa. xk1szn37(l;zlzxg lw,d -jl 3. 1.0 N. How far apart are they?

  The force between a )9xuo+ hdqr f:5y fd*tv1cq,e 0c/um w$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi7qabgsrf p+r ,cq(f4/ ence a 1.0-N force. If they are moved tob rs/ap4+ g(qr,f7 qcf a new separation of 8.0 cm, what is the electric force between them?

  Three identical point chq;e f36xluh- tf z+wm+zxf7 ,garges of 2.0 mC are placed on the x-axis. The first charge is at the x+z l ,+fzxf f7ge3m6qh;tu-worigin, 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 the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A cg9/1 sjf t4uvgharge 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 100 cm mark. What are the magnitude and diretf v1/j4g 9gsuction of the electrostatic force which acts on the charge at the origin?

  Three point charges are ;s4 hnvg )mew bw:nj 1p4-h.qdlocated 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. hm)p1jbshgn:nq.w4v4e wd-; 00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center jp /ggecxpa ty-. 4(u,of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an u ctaexjgp-(,g/yp4 . 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 am1(abpbgl.nu)bm*j o( js g/ ;t (0, 0). What is the magnitude of thampb1s /(bnl j)(*goj. bug;me 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 is +n l ed qx 1vm 6f)i87/nbytpw)do8r zk/p9n*zat (0, 0). What is the direction of the net force on the 5.0 nC chare*p zd x8n7n+8v/n) ft6romdpkw1/zy)q il 9bge?

  Three identical charges of 3.0r kd:;ns/kv+ bt2. azw/u5yp s mC are placed at the vertices of an equilateral triangle which measures 30 cm on ak:5pt swv+k/2/zdub.as ; rn y 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 separatedy o45s. )ydxfe by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q suc4oyx)ds y.5 feh that the electrostatic force acting on it would be zero?

  A +3.0-C charge is a6ubtvv 69e ukt53(wg gt the origin and 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 force on it is zt53 k 9vwtu(b6gv eu6gero?

  Charge +2q is placed at the origin and charge -q is py+0.c(2p w q wv.xsqrulaced at x = 2a. Where can a third positive charge +q be placedyqw(.0 w.qv2pucs+xr so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totnf27au w;d)l xal 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 attraction of a fixe 1smrgo,do94sd proton some distance above it. How far above the electron is the psos drg4,9m1oroton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting b. dls8/ gesq5a,gpd/ threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them ap/s.,lebgpgqd5 s8 /adart 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 the elef1 9osw epr m*uki8g/y 0z)x/fe+n) qoctric field at a distance of 1.0 m from the nucleus?yz8 f +osuem 0)ep)i1 rgq //x*9wkonf

  What are the magnitude ane4u-xyu7q)vq b i(v2s u6 vbz6d direction of the electric field at a distance of 1.50 m from a 50.0-nC 2bisvu) uv-(qvy z6e7u4b xq6 charge?

  A 5.0-C charge is 10 m from a small test charge. Whs(ur o s8m8n9eat is the magnitude of the electric(sre ns9m8 ou8 field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charxsua vqd3/.+b e:s6z bge. What is the direction of the electric field?qa3ebx +sv:u6z bs.d/

  A 5.0-C charge is 10 m from a small test chargeoctq)w2 o , gix6lk*t;. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the ,)otwgkt l;o6c2q*ix test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance6deu 0ar/ xe;:sajpr- of 4.0arruxs /a 6- pj;ede0: m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at th9mh+9ehfc * nld :zj4ee 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is th+jm*l94hch9 fneedz : e electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 ic 8d(tmk (zg e.ue1(ucm mark of a meter stick and a -4.0 mC charge is placed at the 50 i(cum 8de1zu. ke((gtcm 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 scn8dc 1l+d(:2 dn i:hytsd r:are placed at x = 0 and x = 0.20 m. What is the magnitude of th:c(::tsd 21 l is8rdc+ynndhde electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0*eepi f1givc6;2c.mvtw pveo 08ru -- .50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the squarem-v0ro-1 wet8viee*2ppu;cfc 6vig . .

  Consider a square which is 1.0 m on a side. Charges are placed at the b( l jge n0wo *1*d:5griuhp*lcorners 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 magnitude of the(re0g5n1:hl i* *budgwopj*l 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 usbvjs3)+o5 v wniform electrics5vjo3w bv)s+ field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mfy:i8 :;it urtC 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.ai s1me8 6xl,:j;jjy m120 g is placed in an electric field of 6000 N/C pointing downward. What charge musjxi6ajm1mj,8ls;e y: t be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g c m9qxztt;v81ozn5 n) varries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitud9nv n8 zoz xtvq)tm;15e and direction of the electric field?

  A metal sphere of radius 10 cm ca zf)4f4ay6bfe rries a charge of +2.0 mC. What is the magnitude of the electric fielbfz)ff4 6aey4 d 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC.n3fwgj3 zq v95e,3g-lnkdr 5 7m9qqpo What is the electric field 6.0 cm from the center of the sp v e5oj 3q5qq7p,ng39k9nrldzmw g-3fhere?