State the law of conservation o*j, yh v,vorjgb,cs6-sf7xaf8 )x6pmf electric charge.

  Is it possible for two negative charges to attract eack;dh3tz7 imljldy mc;k:unk/ / 8yw:3h other?

  Is it possible for a positive and a negats.len(k6dmlug4 s- +n ive charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the0 il nj7jd:4mx process the glass rod acquires a positive chargj7ind0jlm4 : xe and the silk

  A proton carries a

  The model of the atom showsmeh )u 7 zz ozb4i.*4gtg2,enm a

  A neutral atom alwayshfv; * vk6bpfslm8,b /gg17ju has

  An atom has more electrons than protons.4uo0pv427. es(at9 j rn pj zfj5tzd2e The atom is

  Materials in which the electrons are bound very tightly to the nuclei yg1gbh vj7,mwx+ ;d b,are referred t;bvdm ybhj,,x 7g+gw 1o as

  Materials in which the electrons are boun2)vxy1 fu ywjq: 5.gvid very loosely to the nuclei and can move1qy)jxf 2 wgi 5yv:v.u about freely within the material are referred to as

  A negatively charged ro u h,xb;i(cm.dd is brought near one end of an uncharged metal bar. The end of the metal ;dih x(mu. bc,bar farthest from the charged rod will be charged

  Sphere A carries a net positive chargl.purr+d m3h 5e, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?mldhu5p +r 3.r

  How can a negatively charged rod charge an electroscope phg1tq x xs5 ;ej(w)c8fositively?

  An originally neutral electroscope is briefly touched with acq)ql /j8)j iz positively charged glass rod. The electrosco/i c) jjl8)zqqpe

  An originally neutral electroscope is grounded briefly whilbeo bp6,q18at qa/ yx9e a positively charged glass rod is heaoqqy6eb8 ,1p9t /abx ld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leavcj t26 :x:g)nlaw2bok0 0 bnides separate. Then a negative object is brought near the electroscope, but does no 0acwbxon20tdj) n6:2b g:kil t touch it. What happens to the leaves?

  A large negatively charged object is plaq) ng ;7k.n1 g hcfy5d0tmei)eced on an 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 follow nt5if d7g) 01en;)qheykcmg.ed 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 Coulomb constae. mj ( cg+de8bhs-xt9nt $k$, which appears in Coulomb's law?

  Two charged objects are separawo99dlh v(k;ug rl;) qted by a distance d. The first charge is larger in magnitude than the second chark9rg ;h( ;l9uvwqldo)ge.

  Sphere A carries a net charge and sphere B is neutral. They are placei wj4sgy(r( e+uhdc*7 d near each other on an insulated table. Which statement best describes the electrostatic force br dgy 4ce7(j*+swih( uetween them?

  Two charged objects attract each other with a cn/axy)7ae 4ra ertain force. If the charges on both objects are doubled with no change in separation, tra)74a /eny xahe force between them

  Two charges are separated by a distance d and exert mutual attracti- c/ )2+d-hir;qhya2 zmvci lb4 y8ouxve forces of hcul io av2xb-4c / +m)rqz8y;d2y h-iF on each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to thr2 )i6 )z9um(qt,duss5qbsenrn*xw /e force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centerswsn(*bxe rm2 run)qi/s5,z9ud )s 6q t is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance ofnd8fo c*w) s* br/cq8l 1.0 m. What happens to the magnitude of the force c) r8*oqw8bnfcld *s/on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated byu97u.6ssif gsjen;*+ -5or ap (dr7 rvd0zgmf a distance of 1.0 m. What happens to the magnitude of the force on the first electron if dj;u *z(s.r7a 5fed0rg9fvusr -m6 7sgopni+a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m.l.ns, :ia3 qlrp+0v b 8yawdg0 What happens to the size of the force on the proton if the electron is moved 0.50 m closer to tl p.i08y ln,g+aaq30w bdvr:s he proton?

  A point charge of +Q is placed at the center of a square. When a s4 50k ,xq7 injegtt)fa6cl ,kjecond 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 is the magnitude of the net electrostaa le,j,i5tk n ktj 60x7qg)f4ctic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed atlxs3pbc lhgh97 4mazz+t,/ y. mw6u)u the centroid 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 on the center charge due to a third charge of +Q placed at one + zby7ush4plm,hz u 3) 6.tgc/a9ml xwof the other vertices?

  Which of the following is not a vec l2a: z:vr uv22pkmad0tor?

  At twice the distance from a point charge, the stht -lr7 j93.nxtqp iy-rength of the electric field

  Is it possible to have a zero electric field value between a negative and positr h ew7 2*v+fnve+tl hi4of.1rive charge along the lineio. wlth2rhfve+n1+ 7r* ev4f joining the two charges?

  Is it possible to have a zero electric field valuei*wzqtl 4- z4 wc ffva7-,z w6sutt5h( between two positive charges *h l i 4(7afwfwu 6,wqz-t-v tz5sz4ctalong the line joining the two charges?

  Electric field lines nearpxvj+ qwi- 5yo 4058oheh5:xviv3 dix psitive point charges

  The electric field shown yr*vbla : .ybmmk 71x:

  Can electric field lines intersect in freeyp /jfcg 9jd:. space?

  A solid block of metal in electrdof cina:9ty: 3ze:a9 ostatic equilibrium is placed in a uniform electric field. Give a statemenfo9caz ny3:t:e 9dai: t concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of ehp0o5s;r/i/ nk(jdi 4 wlfn,a qual diameters are each given the same charge,lr f5ka(ni0; ,so4 d/i/ph jnw the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table insu 34wlzx7/ srln*lb,km6vc+(c8uxe a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top 6l4cz vl/rnsumw* ,87x+ kxsbu( cle3 surface?

  If a conductor is in electrostatic equilibrium near an electric cha /96 i aokiup1se.oeu)l:bt,wrge

  A positive point charge is enclosed in a hollow vin8ul rq (k :pb-/co(metallic sphere that is grounded. As compared to-:/r qpn( iobc8kv( ul the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static8dt .g4j6nbfk equilibrium.

State Gauss's law.

  The charge carried by one electron ispy top6y h0c cf,zztrcg1f a3m1+)o -: $e = -1.6 \times 10^{-19} \; C$. 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 more protons than i ws6u-f esu1/electrons does thises/6 -is wuf1u piece of plastic have?

  What is the charge on 1 kg of pro3bdyb 6 e j8* (hjwynv0af(c/otons?

  An atomic nucleus has -8og*n1 r3 vgt;pobyna 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 values of 2.0 an7e)4s-i embk,o50 sqob,u so hd -4.0 mC, respectivel04 )i5bo7hb u,qks,osse m-eoy. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 4;zwvzuk 2qf2m from a second charge, and the force between them is 1.0 N. What is the magnitude o4zuv2;qf k2wzf the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far (ue we7avqtw.duh/-xayri f0- n7;8v apart are they?

  The force between a (8j7d ft7mw cv$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm a4 thmylzd(y4 fw pn+(/part, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the el( 4 4+yzhmptyw l(f/dnectric force between them?

  Three identical point charges of 2.0 mC adili5o.mzg *uzz w2 p3uu:.trj9 pq;.re placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the th 9z.d iumw3qzltj.*i2go :zuur5.;p p ird 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 j t:)74pgckvkpt ude 8xzzt yy(,6u6/placed on the x-axis. A 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 thcptz67: utpv zteyg /k)( ukx 4jy,68de 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 following positions: Q1 = 2.00 mC at 0o2: yq rwylv :)o h,akoqrztax4x*5- x = 1.00 m; Q2 ,z*h lo:)4-rtwvkx2qqo0a 5y:a ory x= 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 plxc de6q /+mnn1/a; jmwyy3ho-aced at the center of a square, and a second point charge of -Q is dyoy cn/h6a3q-w; jn1x+mm/ eplaced 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 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); n0sq2t:nxhv 5 4i1xglQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the s4h v nx:21tqnl5 xgi0magnitude 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);uwg yx06wr *2a Q3 = 5.0 nC is at (0, ww 260yrgx a*u0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed (n4r2ywpy93u j;zynb at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostz(rn 3np;94 w2jy yyubatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what r 0q2 ww,z*o z5*u.i+7eacwic3jqp fhpoint, on a line betweenafc5*jr+z37z 0uoihq w.wi w*2e p cq, the two charges, would it be possible to 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 and a +9.0 k jnk65fo(2mj5ygj9 a574r,.u wtomduis9 xz-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placf9 jz7mx6k dioan5rjw5uu,9 (.2o skm5 yjg4ted so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is pla(+ t4i*nwubp ix(:id nced at x = 2a. Where can a third positip* ((niix +itu:nd wb4ve charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. /5lkbx(b te2ibe ksd6:4ul m0 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 attracyhw0x 9jta awkot.j.07(2k p ktion of a fixed proton some distan7(xpyt0 2kka hkjj..wtao 0 9wce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduct9 e gtlallum; fb682xr7 .f rek 8xd./3fifwu4ing threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forc/8r f4uf9elgl ;wfd2f ..7kmiaubex 386xlt res 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 magnitudktwhp*g m)s:7mf2 h*94nsd2ts0x.a s rx:hq a e of the electric field at a distancha:2hfmwxp kgrx2dt*).smt s 7s a4h:*q9s 0n e of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance euq:s-hva; :ml )pt*z of 1.50 m from a 50.0-nC ;m:u)l-*e ta qp:hvs z charge?

  A 5.0-C charge is 10 m from a small t2teim*v pp. .ujdc)+s .swo, cest charge. What is the magnitude of the electric field at 2m.vdu pi,p oe+s)w.. sjtcc*the location of the test charge?

  A 5.0-C charge is 10 m from a s79xon 8w.l mtzmall test charge. What is the direction of the ele 7xt.z8l omnw9ctric field?

  A 5.0-C charge is 10 m z 1 c9j)5ndzhzfrom a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placzj n1)c9dz5hz ed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated (r*uwi33pof2yes f 1 hby a distance of 4.0 m. What is the elehifopr1 3wy 2u*3f(s ectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark2y vcq ie557dt of a meter stick and a -4.0 mC charge is placevid2ce5t q75y d at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of tm4at d+ndj72ur2vt1oao/4en99l kca meter stick and a -4.0 mC charge /c ulrdoaek94dnm 94nt+t2 a 2tjv7o1 is placed 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 -7.0w --rqxij0p )c6n 1pdk s.5ktm mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electx5i0 tsp p6wk. )d1-c r-nmjqkric field at the point midway between them?

  Three 3.0 mC charges are atg6 72he-x8adv t re:g ur(9act the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of thachvea7:g86rg-2t (tdxr e9 ue square.

  Consider a square which is 1.0 m on a4ry. r def0nw6 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 is the magnitude of the electric field at the squ dr4 y0ew6n.rfare's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unltk 87l2- 9tjq u/)fvxx9r idhiform electric field. What is the magnitude oftfk7d j )8/- x9x2rul9vlqthi this electric field?

  A particle with a charge*bwm/ rt( odm,i+)h xi of 4.0 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 fielv)7,5vyyhw yv snqpz3i cw 64i:rp-)od of 6000 N/C pointing downward. What charc))v 3qsiwown-,ypz:h vv iry 467yp5 ge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carvd u.4le 6bag2ries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agau4e6l.ag 2dvbinst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What*lox i+9c eo;q*3q ols is the magnitude of the electric field 5.0 qio; 3*ll+*oxse o 9cqcm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charg+j nn;5x0u ufm 5ko5bae of 3.0 mC. What is the electric field 6.0 cm from thex5ubu0kfomnj 5; +5na center of the sphere?