State the law of conservation of electrfceh.)ty v u :5(,d( g:vygffwic charge.

  Is it possible for two negative charges to attract each othcj 4t8ll- es*yer?

  Is it possible for a positive and a negative chargey:qdvjrz0985s g( no*s5 /r chzqpil9 to attract each other?

  A glass rod is rubbed with a piece of silk. Durt 1o-ewkwpysh.o/9a0u e1 : kwing the process the glass rod acqui0eyhk1uwowk9e/a:1to s w p -.res a positive charge and the silk

  A proton carries a

  The model of the atom svu9*nnfbt * d.hows a

  A neutral atom always has;8p:jiqv vmp/

  An atom has more electr 5a4elo7v .nkcons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are re6 6 jep;u)qpyrferredq )6pepyurj 6; to as

  Materials in which the electrons are bound very loosely to the nucy;k,umu(i 9ui lei and can move about freelyy u9imu(ku;i, within the material are referred to as

  A negatively charged rod ukiko 2, on13 jpvx3b.is brought near one end of an uncharged metal bar. The enu.oipxk,j 2 1nb3o3vkd of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B isbl m ri2v6 ux20mnic**yv lq3)qf7tf( neutral. They are placed near each other on an insulatedbv2q*tix3c(72 fy*l nu m v 6l0)mirfq table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an 29vb+ :4w+ vht j8qkf oqaw*35twftgdelectroscope positively?

  An originally neutral/v6cxb/qfna )0dx6kn electroscope is briefly touched with a positively charged glass rod. Tc/ax 6 q/0vkd6bnxnf) he electroscope

  An originally neutral electroscope is grounded briefly while a positively )t)gq52ogo 8bdq x:ozcharged glass rod is held near it. After the glass rod is removed, the elbq2zx)ogod : q 5gt)8oectroscope

  A positive object touches -p my6e.xh8s qq1mh5na neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch yx6p8qm-hh qe1 m .sn5it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tabv/t97j vx ybehd9igm8 ul1-g3le. 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 the negative object. What is t g31e7x9 u/dtb8ih-9lgy mvvjhe final charge on each ball?

  Charge is

  What are the units of the Coulo+hej 6g hy37qbr (+kfsmb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charg8tvy/ke zhhd)b *d)8ee is larger in magnitude thavb))hde*dy8 h /kz 8ten the second charge.

  Sphere A carries a net charge and spheqph:o v)z13x9ht9f jhvo -14efm xz: lre B is neutral. They are placed near each other on)93h- 4 zfv:o m1lqxh o: jehtvz9pfx1 an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract 4a4 sm i*qnvb+each other with a certain force. If the charges on both objects are doubled with bvq44 iamn*s+no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive8 y z;crb0da0u forces of F on each other. If the charges are separated by a distance of d/3, wc0uyr dzb 0a8;hat are the new mutual forces?

  Two charged objects attract each other with a force y:cw6- b r:xhgF. What happens to the force between them if one charge is doubled, the other charbryh6 cw :x-g:ge is tripled, and 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 distance of 1.0 m. W1n*:o7kjm2 gfu wc1g. 9hg uyohat happens to the magnitude of the force on the proton if a second electron is placef.1gyo*1c27um: jh gkuogn9w d next to the first electron?

  An electron and a proton are separated by a dista*ejtjg q -p.c4nce of 1.0 m. What happens to the magnitude of the force on the first electron if e -jt.jpcg*q4 a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hap/uv:r 8*0ecxn)iqf r/mtl0gjpens to the size of the force on the proton if the electron is iet )j 8c/vq0mnr 0rxu/fgl*: moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the centeu7r 2mbjzmj yh.4+8+ b5gwq-;w ufojp r of a square. 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 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 mqj+o-y.fgpjb25zb4 w7;rw8+u jmhu square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Whecv0ng6wpq j8ewm 4m8+ n 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 onenc4gmwm8 p8jw 60qv+ the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vj2fx p8c6su5x8c: o azector?

  At twice the distance from a point charge, the strength of the electric 7r lf;ox9qrr*e zc *:nfield

  Is it possible to have a zeo1f 4 seo+lg7gro electric field value between a negative and positive charge alon 7gof+es lg4o1g the line joining the two charges?

  Is it possible to have a zero elec vay yi6x8f.k ab)-z:jtric field value between two positive charges along the line joining the-a. vy6jz abx8k:yf i) two charges?

  Electric field lines near psitivexr, +0o9rfmc jq0p. vh point charges

  The electric field showm aood t4 +;s/jgas2i0n

  Can electric field lines intersect in freeqv:0cuom85zp xb6xc 0mpn+1bcs zi1- space?

  A solid block of metal in electrostatic equilibrium is placed in a n rgxpj:1ny60uniform electric field. Give a statement concerning the electric field in the block's interior:xp60 jy ngr1n.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eyn pn,0l ;prp;z 8ck;tach given the same charge, the electric field (E) mid;cknr 0lyp n8;,pz;t pway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform eloxv f-l mhg.8fsa, mp:,+*qt xectric field is directed straight upward. What can be said concerning the charge on the-shm f xt :xg+*aqm,op,l8fv. block's top surface?

  If a conductor is inl,ka/ 6gknxc3wjo/70v;/l3hwc xa jk electrostatic equilibrium near an electric charge

  A positive point charge eg h-1xdf: ip7is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a :e ihx17-pdfg point directly above the hollow sphere has

State three properties of conductors in static 2k*zghvgqh ;- v+ge7 fequilibrium.

State Gauss's law.

  The charge carried bsrsmud9 99d5h; 8 4dszvsuh8oy one 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 nenw1k;/g j+q cv:w3sa kt charge of +2.00 mC. How many more protons than electrons does this pies3qk +/wj cv 1k:;gwnace of plastic have?

  What is the charge on 1 kg of pr c.rzs1ucq,e (qafs70iyr sz4l,7k+ rotons?

  An atomic nucleus has a :pvvwvear.co-dl)dg h92/:jcharge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated byx4r j6b;s xh p+9bvoe( 1.5 cm, have charge values of 2.0 and -4.0 mC, re+; j pboxehvsx96(r4 bspectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a se szq9 lacv8 .8t s1yi 5)r+lqxm4-dlwbcond charge, and the force between them is 1.0 N.xtivl48az)-dc y 1l s8bq.q w r5+9sml What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far al3 hv,f n8 l)eu * r1u;zo/t7x5ypwciepart are they?

  The force between a ee4ba 4hgtr0 ,$30 \; mC$ 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. 7mhgpzjuda6- . 54 rwh If they are moved to a new separation of 8.0 cm, what is the electric fwz6 a7p-h m4. grh5judorce between them?

  Three identical point charges of 2.0 u75pgc exem9)fm4o j5mC are placed on the x-axis. 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 and dirmu 5o4x5pmc7)9eg jf eection of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-a58,qqyp:m+ 0ja(n tyf rji n9amq*oe60gcbb1 xis. 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 electrost+*b8qmmg t:6qi0eo 01 ,qayj j(py rcf95nb naatic force which acts on the charge at the origin?

  Three point charges are located at the following posit+:qyscusea 7pzxoqe t;8 /i /*ions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 iqqpu*te+:s ;8y 7xc/es/o azmC 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 placed at the center of a squarvhgm63gl;;o p7b 9tmsx,w3m;k2 tvt ne, 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. Whamxt bk; vm3g;glno pm svw92,t;h6 t73t 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 = t ) b6tg5uj;f;zlm;h j-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wfjjltg;mt h5 6z;) bu;hat is the magnitude 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); Q3 = 5.0 ld i7kgbcgp:zjk438n 1i3zt 8 nC is at (0, 0). What is the direction of the net force 83zlb 4j31tz7gp8 :ni d kkcigon the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the y 64cqlsyg q/l)-xns+yrp8 /fvertices of an equilateral triangle which measures 30 cm on a side. What is the magnit 4snxly+ p y-8lf/g)sqyr6cq/ude 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 u:tano5qs 2j2point, on a line between the two charges, would it be possible to place a charge of -Q such that5stqon 2uj: 2a 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. Wh*(o zd--riaowhir3 ee2yb*p0 l4x :xnere on the x-axis can a third charge be placed so the ndi(pinxho3e:o-rw4b*z- a2lr0xe *y et force on it is zero?

  Charge +2q is placed at the oriw6/vncem ); pz15yg odgin and charge -q is placed at x = 2a. Where can a )dvz5n;e1 m/ pcyog6wthird positive charge +q be placed so that the force on it is zero?

  A copper penny has a massxk* ys uy,.soj4w+b,r 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 theky nt1ku, (eo4 force of gravity by the attraction of a fixed proton some distance above it. n k,uy14 o(etkHow far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a cpq*. *4q/hre5g ljctr*xawd x ;q 1cj4ommon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threadscj45xwjegtp q*4q.r* a lh d*r/cx;1q is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude of urp6ib/5 azo6bhac) 47mb2xothe electric field hbi5za 2o 4uabpro )7x/c6b6mat a distance of 1.0 m from the nucleus?

  What are the magnitude and direction0 s/: bf rlo+g98gea j,x(mwc j7k:lnb of the electric field at a distance of 1.50 m from a 50.0- +cgl8e ml:nbw:ja f/0rg(9jbsx7o,knC charge?

  A 5.0-C charge is 10 m from axt vu;us:rlw0 msr p1xc:( :3c small test charge. What is the magnitude of the electric field at the locs(v wcr 1;cxsu:p0r:3mxu : tlation of the test charge?

  A 5.0-C charge is 10 m from a smallzshn e0x2h ;/p test charge. What is the direction of the electricpn2;/hex 0s hz field?

  A 5.0-C charge is 10 m from a small test charge. What is the mar ic4d 4:it7pri h2n)lgnitude of the force experienced by a 1.0 nC charge placed at the location of the testti4rcii2p:7dhl )r4n charge?

  Two point charges each have a value of 3.0 C and are sepaz 0g ds m(y1dw)egz8mmt:94eh, .xmf grated by a distance of 4.0 m. What is the electric field at a point mis (xgmm.09e)1gwd:zhzgy t84 fm dem,dway between the two charges?

  A 5.0-mC charge is pla /k p/wj/tsb3h 8*1r(tj f.kvynv h6wkced 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 electric fiev8n/*y/.h3v t(s j1rwf/wjtk kphk 6bld at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chc21v zi:3vgcrarge 21 civz:gcv3ris 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 -7.0 mC are plac+3by+x *hyyb ved at x = 0 and x = 0.20 m. What is the magnitude of the electric f*bb+yv+ y3yxh ield at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m1 h7/pjhtf i2kxv6w-z. The last corner is occupied by a -3.0 mC charge. Find the electric field at w -h/6f1hj 2k7 pztivxthe center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed atpp 6+yt5cga;g+w5ml x the corners of the square as follows: 6x+g;5gty+l a5cmpp w +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 square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform bi762fpwqm4z electric field. What is the magnitude of thiz7m2w 6pibf4qs electric field?

  A particle with a charge of 4.0 mC has a mass offdr6+7y,/qqf8 a*k0 ngvujci $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0( 0(;txbfskyxb7u6 ymum y-*h.120 g is placed in an electric field of 6000 N/C pointing downward. What charge mus(f7yuybx;k x( *m- 0hbyus6mtt be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is p 6k2oe7zwt zb .*pjm9alaced inside a unzo2z. 6*b9w pjeta km7iform electric 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 cm carries a charge of +2.0 mC. What is the magnien(wke m(n + 6w-e,rfjtude of the electric fie-(+nnwje6efer w m(k, ld 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is tc)qja+ 1pfb xkr5brq-s/tk*kryx 0oj4)-vg 8 he electric field 6.0 cm from the center of tyjq+p-k)5sktabk-1r /fo jb*4 gc)r x8qrv0x he sphere?