State the law of conservation of electrimgb5w: o ;bp p zxr6m x7n;bsi-lf):,ic charge.

  Is it possible for two negativ b4ob6 czc3jwo/z 7q0ve charges to attract each other?

  Is it possible for a positive and a negative chdrhd-x 4k,n4a9 i2sfnarge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass ro re(,8rghsgt(d acquires a positive charergg(r t (h8s,ge and the silk

  A proton carries a

  The model of the atom shows+ 6qkst/ngad 1 a

  A neutral atom always has,7e+y2 g wehlrgk( onv 5egc8,

  An atom has more electrons than proto*1cx.izf -o xins. The atom is

  Materials in which the electrons are bound very tightly to thalijtvp* r:yr9 b ,.s (ch:jnaiv4- u5e nuclei are referred t:y(i-c.avs r* ivb5 9t4nrau jljp,h:o as

  Materials in which the electrn9o(j ex ut*fl8u/g0b ons are bound very loosely to the nuclei and can mob/ xjog9l8*utn0fu (e ve about freely within the material are referred to as

  A negatively charged rod is e1s- s:-vy9gpyr6xd zbrought near one end of an uncharged metal bar. The end of the metal bar farthest from the 1e-6z-9v:ydssyr g px charged rod will be charged

  Sphere A carries a net positive ch98ir;+i l3p 7iwooatjh //hwrarge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire t rl/wh38/ari9i oht7p +j; oiwhat is grounded. Which statement is correct?

  How can a negatively charged rod chi z(oye m6qzrs4 t;f-,arge an electroscope positively?

  An originally neutral electroscope is briefly tzv7/y;j4nz o zouched with a positively charged glassj4vz/7o zy;z n rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively ch4z 5qy8w,5o (waf 5 -7oenz/rszbaqf narged glz sz- a5( oqr/8 7wnw5qe ,oaf4yb5nfzass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral eleclf9wq52roq aai *vn4;troscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch ia5l*;2aor94nfq wq v it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutrw6qnrlwnw ti 90;)ij f8 i98bial metaltww;w8b8rln6 )nif i j0iq9i9lic 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 ball?

  Charge is

  What are the units of the Coulomb5,xvt( )bnyw+ vnt p 2;lar4eo constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a dist 3pq akt6v7 wzsb,y,*wcvs3*fance d. The first charge is larger in magnitude th 6 fa sv,wq3cp3 z,*y7twvs*kban the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nealm0owxqak0(n/ ts--*g 3)djd( pb xzer each other on an insulated table. Which statement best0xx)3-a*/ m kw-b(0ez gltsjpndd(oq describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If t4wivuj ;)qjv*3hjcn, bmc ,k w t9/+hbhe charges on both objects aren +9kjc,hwq4vu);w v itmjcb3,*jb /h doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exercg 2f1 cf*l6jkt mutual attractive forces of F on each other. If the charges are sepgklf*1 cjf62carated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a c(3o9b1o cy m9sc q)3omng2pj force F. What happens to the force between them if one charge is doubled, the other charge is tripled, ancgoyopo32cc 9qs(1)j3 9m nbm d 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 did zcj1ubd.j)a3,. csw3/mx fistance of 1.0 m. What happens to the magnitude of the f/.)dawjxb313zujfm . i ,ccd sorce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separat/ p dvvlg*)wq;ip*9i med by a distance of 1.0 m. What happens to the q;* *gdml)wpvv/ iip9magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a protc;m5 e ke 70,edzi6vggon are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to gmkzi;60 eee,gcv 75d the proton?

  A point charge of +Q is placed at the center of a square.vih, q,;fto6:n pnb )mxyj,.w 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 cente,p,,nhmty. ;x b:ji o wvfn)6qr. 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 aoem02 .m w+fuvn equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force f+v mw.2u0moe 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 iszc+mc2ns pt806 :/h4a rwbr es not a vector?

  At twice the distance from a point cha/ ;vey cn h 7*n9v2wv-cyws-yx,y,c7m mek+m hrge, the strength of the electric field

  Is it possible to have a zero electric field value betasjjn f690+ 9ks.dl jeween a negative and positive charge along the line js6 najjd9 0 ek.f9s+ljoining the two charges?

  Is it possible to have a zero e,eki*0; i*hl)kqruu jlectric field value between two positive charges along thj*r)hklu; *k0 uei,i qe line joining the two charges?

  Electric field lines near psitive point f*:pza ;2;zz q+hxwt kcharges

  The electric field show-, .vq7kd ahxan

  Can electric field lines intersect in f ixb)vkq3fbo 0tu o 1dg8d9m10ree space?

  A solid block of metal in electrostatic equilibrium is pllyx0d 0q g(m2raced in a uniform electric field. Give a statement concerning the e0xgl2dr0my q (lectric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of eq i97zm3kb ui sp,6gcf7ual diameters are each given the same charge, the electric field (E) midway between the center and thmsp3c 6, ukz7ib9gi7f e surface is

  A cubic block of aluminum rests o0mt+,mh5nk p0r 9glnfxs 6sb* n a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surfan, snksl0mp r06hmf9 b5gxt+*ce?

  If a conductor is in electrostatic equilq :o p+.xcxw7qibrium near an electric charge

  A positive point charge is enclosed inz2d f0d1cyb:z;wau u, a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field atbzy fz u2w aucd;0d1,: a point directly above the hollow sphere has

State three properties of conductors in static equilibrjp s.hy ;hau usfm07:;ium.

State Gauss's law.

  The charge carried by onettd pmc;f6f-,2y:4: lc xrxg r electron 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 d( ri4z9ww(dj+2.00 mC. How many more protons than electrons djw9iw 4z(r(ddoes this piece of plastic have?

  What is the charge on 1 kg of protyi u; (,7jflbqons?

  An atomic nucleus has a charge ofanwze w .gs,1,d7mu)f $+40e$. 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 va k-l)9lw2js3 sct; mmulues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them?- m u;2)wks l9jcmts3l

  A 1.0-C charge is 15 m from a second charge, and the force bepyajd gsx,p6((knrye )q: 88 vtween them is 1.0 N. What is the magnitude of the sec) xyak,y v:nsj dre8p8(p6(gq ond charge?

  Two 1.0-C charges havmtuurw g) mrxpv m)bo1 4z0*li..)o d:e a force between them of 1.0 N. How far apart are they?

  The force between a yp5(fq,/zqa( .zkme y$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ixd0 f.nd1t 3cpgj f7 xs(int*(nitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what jdsf*0t1(7nng itpdx3f x c(. is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The firsxjkq wr s51q8cz +)wc5t 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 the electrostatic force which acts on the charge at t crcw58 5)xq1w s+qjkzhe origin?

  Three point charges are placed on the x-axis. 8h3.u-hjj), 1 wfyj)bplyz md A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 5l8pd-3y )jjmy,zwf hu. 1) bhj0 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 at the origin?

  Three point charges are located at the fol)2cuyr -v .sl7ack6iug8n s-tlowing 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. Whatsuu-yc6lt vrk8gci2a s)7 - .n is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a squt a0y6eqc;d p0are, 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 ofc d t;pa006yeq 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 y s3:.tfcwjn ml c(d5 yf:z5 bmglp5:)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 n.) ny::l5 j5c:mlt(y5fp d3fb smczwgC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC iq8opy )z;vo hlq5s45is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the dir; olzqs5)vyih p84 oq5ection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC ajg dtwwb3e:4dpv;y :)re placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magejv:)bp dtw4gy 3: d;wnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated byabhcaxl j/m: cx949e9s gyq*- 3.0 m. At what point, on a line between the two charges, would it be possible to place a cjbem4*qyxagh /99 -9:ccx s alharge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the ori0nbu oj6io. 5f-0 xendgin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a t6db5-onjf e0 uo0ixn .hird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2aq/1. wxo8v)oa .drt pn 7e-uuy. Where can a third positive charge +q be plapondex/vq. 1u 8a toy7r-.)wu ced so that the force on it is zero?

  A copper penny has a mass of 3.0 jaf*z-nv zb z+0iwh 38g. 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 8 yn:kt x wbea-kt1iq.g8u5g7gravity by the attraction of a fixed proton some distance above it. How far above the e1:8bgeakttiqn5k7 uxw y.8 -glectron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonclpkml/b*)w j +onducting threads which are 30 cm long. Both are given identical charges, and tlk+ /* )wlpmbjhe 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 t :obxs z/ 55 bm/idi*oyw zy5dngl*4y7wg1d8mhe magnitude of the electric field a*4m i5dzg ow1y5s* 7db // gzwiy8 dx5l:bynomt a distance of 1.0 m from the nucleus?

  What are the magnitude and dikei) :l hq6huj9 rp/-lrection of the electric field at a distance of 1.50 m from a 50.0-nC rq 6-i jplehk lhu9/):charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude s1wp(1x 7fvbdof the electric fv s( 1b1xfpd7wield at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Wh4;,+4 lkiqy ctu kq+xyat is the direction of the electri y,i;kc+4k+qytu 4qxlc field?

  A 5.0-C charge is 10 m from a small test dwqt7hka.9w)1grvn ; zhw3b2 charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thtr2wb) hdh93n1zwg ;7k v.wqae test charge?

  Two point charges each have a value of 3.0 C and areab 8 yb;qgot6-xx 8of8 separated by a distance of 4.0 m. What is the electric field at a point mi o88b8a t yofxq;-gx6bdway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and c0tfsyursxdzy9f80*wk; xh(2u- ka /a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at w 0usfkrzu*s hft (xcy9-80k/x; 2dya the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meteocs5kxp9g 5vd4 9h96f.+ df (tgitcdsr stick and a -4.0 mC charge is placd6fd4s5tg+g k9s . 9phdo(vi5f ctx9ced at 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:vi5fzw+( wx 1ehk bo4.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway beobv z:(whxw+k41i5f etween them?

  Three 3.0 mC charges are at the three corners of a squar4bctr-x zk;o2zhmt) e0cb :e7 e of side 0.50 m. The last corner is occupied by a -3.0 mC cm k z)c2 0t4htzb-erxcbo:;7e harge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed ajdql 94z5c5r9vlvj fnww 1:l9t 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 is the magnitude of the electric ffcld45 1 9wl 9ljv9v:q 5wrnzjield at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unz7srml9sy:h , 1 9xn0ofoa*ohiform electric field. What is the m 7*mnroal9o ,: 01hs9 fohsyzxagnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass ; 22egwzrgys 6of $5.0 \times 10^{-3} \; kg$. 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 fiygm7/y -vlay4kt 0z y k2d;x4qeld of 6000 N/C point/vyy;kz - my440aqg 7dty klx2ing downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a chayuo 3b f)lm7)drge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric fie)m7ob3 )yful dld?

  A metal sphere of radvz9k(od5 vn j6396rryvgni0 eius 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's dzegnv0yv (9 krjo63n6 5riv 9surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What ishb/ lfq38ef3u. w 4act the electric field 6.f. w8lf3 t/ c43auebqh0 cm from the center of the sphere?