State the law of conserx ad;j;+s wn2cvation of electric charge.

  Is it possible for two neg2q gi )eoz8h4zative charges to attract each other?

  Is it possible for a positiv7u,w ajwuus6d s +9o2de and a negative charge to attract each other?

  A glass rod is rubbe535 ;a-yhpmx0t +9oafeajv wq3 2crgid with a piece of silk. During the process the glass rod acquires a p0hja9rf5y2 pq v og+53acmt- weia3;xositive charge and the silk

  A proton carries a

  The model of the atom sh cjm-zh:ho5+ ch2p;5 lsvkb3dows a

  A neutral atom always e keog6 qg 4*lq/fu..ohas

  An atom has more electrons than pra msg686+rc-tnt9k xdotons. The atom is

  Materials in which the electrons are bounipn sw,j22egc y-0 uw/d very tightly to the nuclei are referred to- y /w2pug2sjcn0ew,i as

  Materials in which the electrons are bound very loov hu);pmbsb-mg.336kd ad y (dsely to the nuclei and can move about freely within thek3(h )s dd-. buymmagdbv3;6 p material are referred to as

  A negatively charged rod is brought near one end of an unch/c0qh4ay a z)vd 2 tt-xb-xhr m-:mxvp+tef1,arged metal bar. The evm )th1my4+ 2x/ ,atcbqzf:td-ve x-xa0-rph nd of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, abe;i( eb 20o1scbx ;xgk6 :xavnd sphere B is neutral. They are placed near each other on an insulated table. Sphere B is bre; 60bve(2x:c a1sob x i;xbkgiefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscop9 fvngmqe uw;6pp4sq93 +s4solh /:spe positively?

  An originally neutral electroscope is briefly touched with a positively chashkrip ;ou0xm0 ;)cmvw.. a da6uwa57rged glass rod. The electroscop.ua w amk0 dvxmoirau7p)05s.hc; ;6we

  An originally neutral electroh1p d1 fyj*dt:h0zh )48cyfzbscope is grounded briefly while a positively charged glass rod is held near it. After the gytycp1d*f) j:8hb0d 1 fz4hhzlass rod is removed, the electroscope

  A positive object touches a neutral electroq dq o;g( 7t4sk/wxu/oscope, and the leaves separate. Then a negative objeq/tx o;4u(qdgso / 7wkct is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an ins8q5 6klndtyu 0ulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along tn65l dq08 kuythe 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 9m epta/mbz+3Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanceqgs3oc0) 5 nwm d. The first charge is larger in mom)3ws q5g0ncagnitude than the second charge.

  Sphere A carries a net charge and sphere wf-5i6nex+wvg glziz,6wgw-9n6 ua (B is neutral. They are placed near each other on an insu-wnz (ww,w66nexgilfa vugi+ 6-zg9 5 lated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain forceam3bh4;4g pt39rdxbo. If the charges on both objects are doubled 3tp4da;49bogb3 mr xh with no change in separation, the force between them

  Two charges are separated by a distana emd aqw86;5l-2oz hbce 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 mu -b ;a8 d2owq6zh5eamltual forces?

  Two charged objects attract each other with a force F. What happens to ad r;uxemyp :;n oyebc36 m+9+ip 22dnthe force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now3mdop d;2m:eea+b9ycnri; 2pn6y+x u equal to

  An electron and a proton are separated by a distance of 1.0 m. Whj9c -j tyen:ed3d 8i.zat happens to the magnitude of then.did c:j 9y-3eej8zt force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sep vy5v2. bimgm:arated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a secon5g2 m.vbmyv: id electron is placed next to the proton?

  An electron and a proton are sep bhg.jye4wokq- t75 1rarated by a distance of 1.0 m. What happens to the size of the force on the proton if the7yt1 o-qbhw4k gej5 .r electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at th2zfhfyk-ni0*i /nxi9 11w ccme center of a square. When a second point charge of -Q is placed at one of the square's corner0zx w9 -hmi f*1inic1/fkncy2s, 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 square?

  A point charge of +Q is placed at the centroid of an equilate upf641(z;qs uxbzsi/zqc g /+ral 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 magnitud6uiu4zs(1qcqbsp z+z gx /;/ fe 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 vecvraq(hg*xi 14 ws49kator?

  At twice the distance from a point charge, the stcl) g l4.2elvm(eca ,cjt0:q lrength of the electric field

  Is it possible to have a zero electric field value between a negative auq htwmb 2l:fnxs l67 s4e-;m(nd positive charge along the tlwlx-n67m bm4;h:(2 f sqsueline joining the two charges?

  Is it possible to have a zero electric field v tx fmp;d3sc, ((*lgg+2e lzddalue between two positive charges al,( d gp2 zxlc;+t*3e( dfmdlgsong the line joining the two charges?

  Electric field lines near agiz by l p5ep9*20vvi9c9dg2psitive point charges

  The electric field shso.al0;lo y 0nown

  Can electric field lines inten20r 2(hiy 2)ml rwbskrsect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unifork,ueqa2nc5w dd; ,;f em electric field. Give a statement concerninde,,u;dnkcq2 wf;e a5 g the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal vojj92i5 ,vi y3k qj07ln.vmsdiameters are each given the same charge, the electric field (E) midway between thiy 2 j.jnv 3,v o0qsm5ivk9l7je center and the surface is

  A cubic block of aluminum rests o) )sd*xvi n:xon a wooden table in a region where a uniform electric field xx)odvns)i :*is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium /d++:q - ,m-jve twb c1wlgegfnear an electric charge

  A positive point charge is enclosed in a hols3 2f3 :u/obfbmxi :ptlow metallic sphere that is grounded. As compared to b f:s: pmi/o2fbut33xthe case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties mst;:uvl5)j b of conductors in static equilibrium.

State Gauss's law.

  The charge carried by onh b lxhxa3xgwa08 /zq::s:iq(f6w pb.e 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 chargfh8 6gxhl+,oa:tkl *s e of +2.00 mC. How many more protons than electrons does t+h*6 xk oah,8lst fl:ghis piece of plastic have?

  What is the charge on /:b td6x84:fa:xzdprwtq9 gf1 kg of protons?

  An atomic nucleus has a ch b,s.hvabtnzb:(i /vs;cb* ;j tl ty(9arge 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 va u2g(j e,dtyt4v zas63lues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electri3a dzseyvj2t tg (,4u6c force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwt)wj6dz8gz t. hp,b* ceen them is 1.0 N. What is the magnitj tw,p8tb)*hzcg6 z. dude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 Nrrz34ao in4 u9. How far apart are they?

  The force between a y8ilx 8 vmnh;8$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experienzztpawv(:6 qpp1q t2d t3*9vwce a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric wa 9q1*vdpqt3tv(pztp 2 :wz6 force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first cha vywlu;)s(x*j rge is at the orig(svuy );wj lx*in, 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 the origin?

  Three point charges are placed on the x-axis. A charge o8g/h7r )qyarv6aq7df) z bg-o f +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. ))oardyz q6/g7rgh v8 - f7qabWhat 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: Qyg vw85+ 9vsag1 = 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 magnitude of the force on the 3.00-vywgv5sag8 9 +mC charge?

  A point charge of +Q is placed at the center of e3u09zm ktq 2aeyjy51a 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 uyqj20zy 15tek3ae9m 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 jmvps-ilwonp1g f3 9+ .iz- ,sis at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the mai+f9vlj ng3,m-opsw1 s zi-.pgnitude 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 nC g /ui7rjpmy19is at (0, 0). What is them9 y7ujpi/rg1 direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed atckivmi4 9s otqe) -lr5t94p8m the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of t45 mm9orv t)8is9pl- t q4kieche electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. 3c1p fd+-ge sqAt what point, on a line between +egfs 3c1qp-dthe 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 hii k;c8e12,0 a(:7ugw hnwgjue; ma bat x = 4.0 m. Where on the x-axis can a;,:aub1nh k82 w0iw(gei emcuj;7ah g third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q ,fln;yfw2 d3-o t5hstis placed at x = 2a. Where can a third pos- dtt,23yow5 s fnh;flitive charge +q be placed so that the force on it is zero?

  A copper penny has a maswz. jrqkxv sh2 nzt7o5/ e-z91s 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 agaif. . hyllp+7n(+;ws,cv9)dnnck ,wt) apa sscnst the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the nsw;fhw,)tcc+a.n +sla7npl .9dvpk ys)c(,proton?

  Two 0.20-g metal spheres are hung from a common poin svh3n( :gv.qmt by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic h3(vm :nq.v sgrepulsion 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 x lj.,g kj;t :5w adxwg-ds/8cis the magnitude of the electric field at a distance of 1.0 kxx w jad,-;5djwt .csg:8 /glm from the nucleus?

  What are the magnitude and direction of the elect gayophlh: j k;w11x3.ric field at a distance of 1.50 m from a 50.p1.khjy 3 l ho;g:awx10-nC charge?

  A 5.0-C charge is 10 m from3 4ujpo8 0wads a small test charge. What is the magnitude of the electriw o 8j0d4a3upsc field at the location of the test charge?

  A 5.0-C charge is 10 m from a smallev1 1sxb 6gvy+m4n y,a test charge. What is the direction of the ey1mx6+ sye4 v1v,ba nglectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magpcipc57k a+ f)nitude of the force experienced b )7pc5fai+c pky a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C ab (8 c4qm ytu2qreq/q4nd are separated by a distance of 4.0 m. What is the electric fcqrqqy4mte4buq(2 8 / ield at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm g 53ljn -xv t6g+ai)ixmark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the etan 63 xglijx+5g vi-)lectric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick ao4m. fpdi *ht0nd a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the elecm* hof.p0it 4dtric field zero?

  Two point charges of +3.0 mC and -7.0 mC are k-a fk zsn33f9placed at x = 0 and x = 0.20 m. What is the magnitude of tn s9ffa z33k-khe electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 mhu 83bw yie+mb, u lhr6q+ v75gv0tu2p. The last cor,g5p0e+wuvql 7 hhb86t vur2mi u+3byner 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 nq/usd:u lajab3 e0 57side. 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 the5a7:a jeu n0/slb qdu3 square's center?

  A force of 10 N acts on a charge di3ou fff3d0 (5 bt0k7ykj9hfof 5.0 mC when it is placed in a uniform electric field. What is the magnitude of th35jf3k fdi7 (utbf0h9yofdk0is electric field?

  A particle with a charge of 4. 4:j tmrrkje.k dm0+,o mpb57f0 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 field of it w+o1 szs544nwhz s96000 N/C pointing downward. What csnzi9 w54t4sz1+sh w oharge must 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 d; u lz-j3e;inball is placed inside a uniform electric field, and is suspended agaii3djn ;z-e l;unst 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 mwr;6wz ,ue1snu5fi p3 C. What is the magnitude of the electric fieldw5is3w1 6 ru,pfe;nzu 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What i 6evb1;td;3tgx oyvu )s the electric field 6.0 cm from the center of the be;ogdxu 3; t)tv6y 1vsphere?