State the law of conupo (mxz5z x// nwyd6*ol0ld :servation of electric charge.

  Is it possible for two negative charges to attract eac02lv1 ki+o5d;z d4m jm3 kjcwph other?

  Is it possible for a o.bqmfyj 6wky; m+o66 positive and a negative charge to attract each other?

  A glass rod is rubbed with a piec +,(ym bggcfe-e of silk. During the process the glass rod acqu g( ,b-mygefc+ires a positive charge and the silk

  A proton carries a

  The model of the atom :9 uwxv b;2nuishows a

  A neutral atom alwaywf):dn ;lns k:s has

  An atom has more elect )lq/np dp t zzln1ah8+0x;x9lrons than protons. The atom is

  Materials in which the electrons are boun zdomh 3n*d:7/oxub l.d very tightly to the nuclei are referreddnodum 3z/olh *bx:.7 to as

  Materials in which the electrons are bound very loosely to08 dt znq,jqd5 the nuclei and can move about freely within the mqn ,dj0t5zq8daterial are referred to as

  A negatively charged +ayfg7)/d jgd rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest froma)7yg+/fj d gd the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutraltx*mk,crk(/adv 8 b)qt(0j.n 2ukg lk. They are placed near each other on an insulated table. Sphere B is briefl)dx m,*ckk0gtq .v (8 k/jakrt(bn2uly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope xy 6 gey+i2 rptp0mbc+)14 mfrpositively?

  An originally neutral electroscope is briefly to1 nu 5lb bo71sguqrd,-uched with a positively charged glass rod. The elec n1d7gb5busou q1 -,rltroscope

  An originally neutral electroscope is groun fx/n q7(ic0o5.nbvug ded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the elecq/50 cnbv gn7(x.fuo itroscope

  A positive object touches a neutral electroscope, and the leaves separate. er4lhn98stb: Then a negative object is brought near the electroscope, but does not touch it. What happens to ts le4:9r bh8nthe leaves?

  A large negatively chargk cs65av n n3*v2hww8-p3c ztued object is placed on an insulated table. A neutral metallic ball rolls straight towarnn8-k va*sw3vuwz53 c hcpt26d 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 Coulomb constantat4 va,*pu 2re wtc;v2 9a/hxy $k$, which appears in Coulomb's law?

  Two charged objects are separat)mp:,dt*8tw sw -uyco uo5wa2ed by a distance d. The first charge is larger in magnitude than the second cwo8*om)2p twtsu5-w d:cu,ya harge.

  Sphere A carries a net charge and sphere B is neutral. They are placed n ,rudl q*ot0e7ear each other on an insulated table. Which statement best describes the electr,r d7t*ul0qeo ostatic force between them?

  Two charged objects attract each otkmcpo5b0;w +u her with a certain force. If the charges on both objects are doubled with no change in separation, the force betk;omwb5cu + 0pween them

  Two charges are separated by ran *o1*xubp9 z*4myvm3v8 6*negziua distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutg nr *9i6 m *vu*4zvnmuy zbx*1a83peoual forces?

  Two charged objects attract eac9 tya //xm)0uk du/xxqh other with a force F. What 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 one9// m k)/udx qxxyut0a-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 hapic o+m 8wi7liyno(*t .pens to the magnitude of the force on the proton if a second electron i ii+y8*w7(o it olc.mns placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What ha,z0p)m:dr5yyq dy rf 2ppens to the magnitude of the force on the first electron pd,fyrzyy)d :qr 052m if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Wb wzq.nqy2 w 5r7hu:+ahat happens to the size of the force on the proton if the electron is moved 0.50 b+yuz whnq2.ar7 q5w:m closer to the proton?

  A point charge of +Q is placed at the center md 8d, hdb:6 7bhhfo9xof a square. When a second point charge of -Q is placed at one of the square's corners, it ih,bxdf m9h7o6b8h:d ds 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 electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placv9y*t*,wi) l: huvwto ed at 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 theoi* w,vylt9*vw )thu: 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(h.+6qo4 tg mxric: fzi6i)r j a vector?

  At twice the distance from a point charge, the st5g*izso*v.svo 7 x rd9rength of the electric field

  Is it possible to have a zero electric field value between a negg f,am6j9pbt+ative and positive charge along the line joining the two char9fbpg ,mj6t+ ages?

  Is it possible to have a zero electric field value bet1;k b*kjs usy mzf)13sb)hc2o ween two positive charges along the line fc3y1k s*o )sj2hbb)zk;m 1s ujoining the two charges?

  Electric field lines near e6s 7uq8t)uq(cv 9hfys(teq6 psitive point charges

  The electric field shown /obhvp2nm) +9jh4fj q

  Can electric field lines intersectdygs :l,k9t (z in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unifo xuoxtr2t-b;fki5*c(k (m9v uv/p8knceu65t rm electric field. Givckuu6p5xvk8n t* u t((bio ;vk2t m9exr/-f5ce a statement concerning the electric field in the block's interior.

  If a solid metal sphc *7gqp/4bt smere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midwaytm4c7pg*q/ b s between the center and the surface is

  A cubic block of aluminum rexf6 dej+)amr+xbo upd;6 )ff 8*u:uulsts on 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 surfa8oupj)l+axr) em+u:fd bx6ufdf; 6u *ce?

  If a conductor is in electrostatic ndi.er2 1y (h2; bsc zpz6o8iuequilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sp7jv.u0yec e ;where that is grounded. As compared to the case withoutj0.;wv eue c7y the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equiq0jiwzxu57 m 6kh,4f hlibrium.

State Gauss's law.

  The charge carried by one ez s+o s:;u7i oapwc1xe:o+n9k lectron 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 +2.00u.rk4js w1jc0 0geh;x mC. How many more protons than electrons does this piece of plajh41g0 eu wxsj.r0;ckstic have?

  What is the charge on 1 kg om*hu bf5pnz9dw* xx9 4) jss:qf protons?

  An atomic nucleus has a charg)9y9qehwl y lyo4+j y,w:v9ek e 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 andi3sms 3/, sbb;mbl2 ,xalskj+ -4.0 mC, respectively. What is the magnitude of the electric force between themxkllbaj3 + ;s,smbm/2 iss3, b?

  A 1.0-C charge is 15 m from a second charge, and.r/hz; r.+ h;f kocxtd the force between them is 1.0 N. What irc; hf/o;rkd. xh.t +zs the magnitude of the second charge?

  Two 1.0-C charges have .*;f 5 imm*vci.r5nlkm+girka force between them of 1.0 N. How far apart are they?

  The force between a 8ddx:9a,huhv6f28q wk *xr id $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experie mz iq t eq61nicp/xxyv+qw9b39yy56+nce a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is c1nyw5pe 3 qtqxvxy 99q bym+ 6/6+izithe electric force between them?

  Three identical point charges of 2.0 mC are place dsv)u )cp+a4nd on the x-axis. The first charge is at the origin, the secondp d)v)nu4+sac 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:d .0c pbyre+;(aagw n 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 the 100 cm mark. What are the (rpab;+:g aw0c.yd en magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following posir5flna6 djs2s f*1ki,x c nr+5tions: 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 magnituc srjxn5*2k, d6+ansfr51 iflde of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of t g(x8ku,1w4tfs 6eo9ko2a ad6h: blta square, 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 of the force that acts on the center charge i ltx8k auftg2 k9:4 bowoa(,6 1teh6sdf 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); .o bhcq ucfl7 r5)i(wk4r+ oj;Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on4 iuhw 7rk( c.5c);flqob+jor the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is k1 v4h8pk ifc*yk+rw4 at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wha wfr4yk*h+k pv1ic4k8t is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed wktq* ne9 olm 74:c,tpat the vertices of an equilateral triangle which measures 30 cm k*l cn pmo7e ,:94twqton a 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 separated by 3.0 m. At what pnhi co/ t18rvfh0mcn*w1 s v,/oint, on a line between the two charges, would it be possible to place a charge of -Q such that thehv*ncvw,t s1 micn1 h08r/fo/ 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 = 4.0a87xy rmiig(- m. Where on the x-axis can a third charge be placed so the net force on it is zex i-7 y(mgrai8ro?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. +s g(e1kcqn x*r4kl62rlz,7o o jf gi, Where can a t 2ro ,1c7gezg6 r nk+xj silfql4ko,*(hird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass o(3)n)xz1o9pv;h b*yrcamb 2wsyhz y2f 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 the6)qlmuk h)s jp;k8 9qz force of gravity by the attraction of a fixed proton somes;hm9)pk)jqk l6 8zuq distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common sgn7/yrpn-7;l m+kh wpoint by nonconducting threads which are 30 cm long. Both are given iden; ynsp/-w7r l k7+hmngtical 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 charg7xbw ixze/dym3y,pf-c -7( bge of +40e. What is the magnitude of the electric fielbgdcpyw3-z bx-ef,mxi y/77(d at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction o.. xgg qf,f 0jujd(7fxf the electric field at a distance of 1.50 m from a 50.0-nC char0f .f(dg .gfj7 xxujq,ge?

  A 5.0-C charge is 10 m from a small test charge. surhu 16) akjyo,/l r2What is the magnitude of the electric field at the location orkj oy/ u1)6,sahl2r uf the test charge?

  A 5.0-C charge is 10 m from awjdfs *n 2ys.h* rl.s/ small test charge. What is the direction of the elect2 ss rn/ f**lsdyhw..jric field?

  A 5.0-C charge is 10 m from a small test charge. What iy:+n9xmgrgs6j2 ,n+ht lb,m as the magnitude of the force experienced by a 1.0 nC charge placed 2tgbxn 6rmh +y,sa9 +: jl,gnmat the location of the test charge?

  Two point charges eac.0kr7f-*0 ltoyd evw *ncwcx(h 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 chargest0ec(-xw n7 y*.vdk fro0 wlc*?

  A 5.0-mC charge is pl;z)t;1zvg /fnkvlg0 m aced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the el 1;0/ tnz;zfm kvgv)glectric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick anb9w(-vg);a t: oillo g2t0skkd a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field swk(i;ottk-o)v albl9 g g20: zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = . oiux5 0jn8cv0 and x = 0.20 m. What is the magnitude of the electricxu.5n0vo ji 8c field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.ut c,9 8mpec 9(z5mkibor2d3 r50 m. The last corner is occupied by a -3.0 mC ch9irm pcmt8ek 93,dro 5buz2 (carge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges ar0s7.k n) l ebrsnewt*:.6cbuw4emy u ,e placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 ub:7 eesm4 )0yr*lecwtsu6, .kb .nnwmC 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 square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is pl+ihn9 bpubp a : sjg/a.i7m7p8aced in a uniform electric field. What is the magnitude of thi amg:p7bi7/i.+jub n8psh ap 9s electric field?

  A particle with a charge of 4.0 mC has a mass ob b2e*c/pq.dx9 o 4l3 ;8j2ejldsixjhf $5.0 \times 10^{-3} \; kg$. 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 fielcckn)si8 o g+,zu*v:sd of 6000 N/C pointing downward. What charge must be placz n8cgcsv,i*so) :k+u ed on the ball for it to be suspended?

  A foam ball of mass 0.15 ;tcey7)yw7wtj koi6al 2 l(ly(l +b*h0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electl oylt (hy+e )wl*tla yicw2jb;k(6 77ric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cms7g)nw58qe a5(rosvl:ko p6 t carries a charge of +2.0 mC. What is the magnitude of the electric fields):5noea758lwrqg k o(tvs p6 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What (,k ;p5n2ktctu 7/bijhxx c kr+x,dr3is the electric field 6.7;uc 5d2( c3x x rx,r+htknkit,kjb/p 0 cm from the center of the sphere?