State the law of conservation offjcni9 nn:y;b,,wn 32m6vj nz9oak4 b electric charge.

  Is it possible for two negative charges to attract each oth8 n wnq; eubnje(6/2geer?

  Is it possible for a positive and a negative charge to attract each ota:r qb( wpn/e+her?

  A glass rod is rubbed with a piece of silk. During the processy oem8 nzr/4i(gk,fs0 the glass rod acquires a positive charge and thegfk ryone/(z, 4is0m 8 silk

  A proton carries a

  The model of the atom shot eqw, 5/fh:*,ewcae kws a

  A neutral atom alway:s3h3v2vl y1+1 w9of4h czvrjp6 rmims has

  An atom has more electrons than protons. The atip.a vfqp (ezq-f+ugp27 o iq ova+/-+om is

  Materials in which th)e ,)-w.n, isrbjpqpc e electrons are bound very tightly to the nuclei are referred to)cj- ,i)qws.nb pep, r as

  Materials in which the electrons a fwc0dp3 *. pidf;jx.hp6bcl7re bound very loosely to the nuclei and can move about freely within th;h6 lfd3fpj.i.w*b d07cxcpp e material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. s jdxtb-zn.48The end of the metal bar farthest fronsz4dj8 x t-.bm the charged rod will be charged

  Sphere A carries a net positim2bx 9tsd h0gf04.z etve charge, and sphere B is neutral. They are placed near each other ond2ttg0b h0zesmx9. f 4 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 elecehqku f,e(y k;4gdr-8troscope positively?

  An originally neutral electroscope is briefly touched with a positively charged6zx,t0j7lle e glass rod. The el0e z,l7jl 6etxectroscope

  An originally neutral +r:i4wg ex5vqn.co *melectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod i5i.* crew +gno:4mvxq s removed, the electroscope

  A positive object touches a neutr, s( luqytz*3yal electroscope, and the leaves separate. Then a negative object is bt*l(3 suq zyy,rought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. l0 ss p5uvzno*a15.rs 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 nenvs*1 usr5l0 5zaps o.gative 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 Coulom*snk1wg, yk* gb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is l;weh2o)(zqdo5og , i.i fh9vwarger in mwi.oi, h5;(vhozf 9w)q2 godeagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutz :eer.xkl j(yd.w.l, y.i. arral. They are placed near each other on an ini .zywe(:xk .j .ylda .r.l,ersulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. Ifrfrob tn,,;+ 8fu p :j1rry c4lnmv.)e the charges on both objects are doubled with no changrm,rc:.r8n;vj flunp,yf o)1 re b+t4e in separation, the force between them

  Two charges are separated by a distance d and exert 6vni j**1ptj+kzl ; ufmutual attractive forces of F on each other. If ttl+*f*ij jz kuvpn 1;6he charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eacn nxbb(ezbt6v1 7-d(bh other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and thebn(1x e6zbtbb7n v(d- 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 distance of 1.0 m. What hapk0z-3m de9r topens to the magnitude of the force on the proton if a second ke3 m9dotrz -0electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1e1iu04 m *o +xd (b2afyznph9u.0 m. What happens to the magnitude of the force on the first electron if a second eln 0(auipfb2ed+*1xy4m zhuo 9ectron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hap 1+zrncrlq/n7 pens to the size of the force on the pr/qn7 rnz1 cl+roton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a sec;g-*xwxwa gu( ond 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 *(wgg - xwaxu;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 equi. mwtz-:qf z, 3bjr8bhlateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.m 8.fj:b t-3wzb, zqrh0 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 is not a vecha:wwhg-ud5b wy7x -3tor?

  At twice the distance from a point charge, the strengtiuh p 0vpr/duj3-27) uenddd 2h of the electric field

  Is it possible to have a zero electric fih vgpj2in* 08seld value between a negative and positive charge along the line joiningnj 2*8i0pvh sg the two charges?

  Is it possible to have a zero electric field valu lc 7(csn:aj83u a8jqoe between two positive charges along the line joining the tw3(la jco: j8a 8nuscq7o charges?

  Electric field lines near psitive enu 6h vo+i.7a:,mwge point charges

  The electric field show+0vtfe k8ydiz) iu m1cd( 4ffgd 2z1t:n

  Can electric field lines intersect in f 2 o9w(q0i (nykus x(ll)kno5bree space?

  A solid block of metal in electrostatic equilibrium is plac8zed x3pjw :3 hvo2j.sed in a uniform electric field. Give a statement concerning theew3h 3z : j.p8jodxs2v electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of eq 6axcx);z xa:ane :kj 96qxnr,ual diameters are each given the same charge, the electric fie 6 :)azx:qxcx6;rkjaxe a,n9nld (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wherrqn kha f7muy2a30d6/o+z 6v le a uniform electric field is directed straight upward. What can be said concerning the char0 2va+7r 6o dlzha/kynm6f3u qge on the block's top surface?

  If a conductor is in egw2.v4b q hqtp zd5otius(6a*v. x +2rlectrostatic equilibrium near an electric charge

  A positive point charge is enclosed i1ndy t-uzt2e :n a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric fiudt2ze:1-n y teld at a point directly above the hollow sphere has

State three properties of conductors in static equilfl5b9yr hs2/gi2r r l nn81)rbibrium.

State Gauss's law.

  The charge carried by one electcxy)jo0pbmyx. 0i)3wxd9 of zo,) pt*ron 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 ao *)wvy kb4e5)4n;diis 8jijcharge of +2.00 mC. How many more protons than electrons does this piece of pl)av )ioi4e s w*ji;kj8by4nd 5astic have?

  What is the charge o fc3:zr, lxzdz:w/+d un 1 kg of protons?

  An atomic nucleus has a charge of +z idrlvi 6qa9vpya -p 0)a-osfe.2t *$+40e$. 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 and -4.0 mC,pw ,t:xrte g9( respectively. What is the magnitude of the electric xg wt9(e ,:rptforce between them?

  A 1.0-C charge is 15 m from a second charge, a*qk(lm1)kd o f87auxo nd the force between them is 1.0 N. What is the magnitude of the s k*) of 1m8q7o(axkludecond charge?

  Two 1.0-C charges have a force between them of 1/wfzr8t,qq;x:wh8)cgj lv* qx :et. c.0 N. How far apart are they?

  The force between a byxn c :9:hg-h$30 \; mC$ 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 force. If they avxm80(p3s(p i k:)npiic* tdmre moved to a new separation of 8.0 cm, what is the electri)p k: d0i s3 xi*p8mn(v(tpmicc force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis.igdt -6-f cek6 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 i6ge-f kt6 cd-and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axise. 0 bgcvt +l*vq(2yb;rus2us. 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 the 100 cm mark. What are the magnitude and direction of the electrostatic force wtc2 0u+ruqv.vs( b; ls2*yegb hich acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at ea3-ur gcrb2 ;x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the -e;23r rbug camagnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and asm,pve ub 3ys;l -+pruw;aa1; second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic forba13 w ;v;p+uprlyesa ,su ;m-ce 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 = -1d5 ;a2gzvbec *;vd vy).0 nC 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 nC ;*vybz)v;v5 dg cdea 2charge?

  Q1 = 6.0 nC is at (0.30 m, q- okt-3vssv z5pud+4 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What q5zpd+ sst4v-3-vok uis the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.cl( b.kg g;8mq0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of (bcgk; qm .g8lthe charges?

  Consider point charges of +Q an 64n24 mg*sktxiy qzu6d +4Q, which are separated by 3.0 m. At what point, on a line between it 44xg qy2mu6nsz6*kthe 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-C charge is at x = 4.0 m. Whz5,qhb8to(f here on the x-axis can a third charge be placed so the net force on it is (,qho th58fbzzero?

  Charge +2q is placed at the origin and nyj1y)z iwwx905kp8/kawyrs l zs 770charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that theyi y/ sw15 9zan80 x7p)r l0zsw7jkkwy force on it is zero?

  A copper penny has a i.+der/1t ,diaqdr .ni p((dbmass 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 attf esf(bwcd. cvd8y:18 raction of a fixed proton some distance above it. cbc: 8wfye1dd(.svf8 How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noz a20wjfg1s;b t;;bdo nconducting threads which are 30 cm long. Both are givbw;1bj zsaf2;0o dtg ;en identical charges, 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 c4f d5tz6c6 n ( x2j3au.txsv*rvc l9seharge of +40e. What is the magnitude of the electric field at a nvaccv. d2l(t xx6tz3e 6r*5juss 4f9distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance ofdo5iq z(5jb*qz yoz +8 1.50 m from a 50.0-nC chargeoz qb(zo+5*di58qzyj?

  A 5.0-C charge is 10 m from a smallyuz4 p i3lfpod 0 t+u3b*cu2*x test charge. What is the magnitude of the e4ctuu p u pbz3 l+i*03doyxf*2lectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a smwc l/.enhe8o n9u:/ zaall test charge. What is the direction of the eelu : e o9whn/c/z.an8lectric field?

  A 5.0-C charge is 10 m from a small test charge. What is thev0p4( 67sw1y z.xeg lmqlubs9oq so dvr 5)t;3 magnitude of the force experienced by a 1.0 nC charge placed at the location of the op 90.yls3( bd1olrs swq)quetgv7 zm;v 645xtest charge?

  Two point charges eanv)uxi( u,eei aq *0fs0 xi,o1b 5gf9bch 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 between the two cha10ibi,( uis n0qagxf)x9uebv* e5f o,rges?

  A 5.0-mC charge is placed at the 0 cm mark /-4 l iw3ljyspof a meter stick and a -4.0 mC charge is placedl/3jp siywl4- 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 a meter stick iz mfx: / ci+ep(.k g29,toariand a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electr2mi p: . xo(k ,gtci+fe/rzi9aic field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed aw: jht417nnxzn o5m8py3 6iumt x = 0 and x = 0.20 m. What is the magnitude of the electric field at tw 6ho8mzpjt n 35m1x7:4yniu nhe point midway between them?

  Three 3.0 mC charges are at the three corners of a squt5 vu/xoi /f. h.jwpj r b6*dw1;ul/kxare of side 0.50 m. The last *f rwjw o.;xk/ti/jh1duplxu.5b6 v/corner is occupied 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. Charges are kosizjn ,wsd*bh +1, 3placed 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 magnitu zw1n,h*sj,i d+b ok3sde of the 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 unifor-w (aq /r 8ey,kwxx9 mscsq:6qm electric fieldakq w96: /xx8csq,s-qrmye ( w. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a-rh-v2m nz.3 .o jiquu 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 inhnh jm:u (2 pu9buq)9a an electric field of 6000 N/C pointing downwardqmpuun ( )h2ajb:9 9hu. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge o6- l4,g.tgh9zuratann.4qtvrfam : - f -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. 4 ,q6 a.n tthr-gfa4m-9znvt:lga.ur What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chupgzvl3t a ).ar63jkm:+wmtv +uq)c - arge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfacegk) aq6l3vwvpzm mu3ut.j-c:r +a) + t?

  A metal sphere of radius 2.0 cm carries a charge of v8 v,3x tn5iaih qep13qgg1g, 3.0 mC. What is the electric field 6g3hvg31qte 8qa,xnp g,5vii1 .0 cm from the center of the sphere?