State the law of conse6v, le6vs3bt o9 lr+tvrvation of electric charge.

  Is it possible for two negative chargcn,a90vacpz zv:ro)0es to attract each other?

  Is it possible for a positive and a negative charge to attract j8*i a3lw)gcz/zf 53i- tryhjd7f t lwew,5s7each other?

  A glass rod is rubbed with a piece of silk. During mj:6d. y kquctyf5n67 the process the glass rod acquires a positive chkc7yy:66u . 5 mjqfndtarge and the silk

  A proton carries a

  The model of the atom s;x c6it*cgqst9,2,ihh *lyk la 1 gt*chows a

  A neutral atom always hasnm,65y nmak7 9) tbg4hxtg ro7

  An atom has more electrons tl+wvl ajoy77qs , 2jx7han protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refeqzr),1vt7xzty8 j7 r7v /kystrred )78t,7rsqt7vj/tr zzy1xk y v to as

  Materials in which the electrons are bou (y7l.dkz x:fhnd very loosely to the nuclei and can move about freely within the material are referred t.y:d l7(khzxfo as

  A negatively charged rod is brought near one end of an unchar4c5 rj6sxn 3rlged metal bar. The end of the metal bar farthest from the charged rod w36rr cs n4jx5lill be charged

  Sphere A carries a net positiv1famvd:1pc3 cajxl64e charge, and sphere B is neutral. They are placed near each other on an inla f6cjx1 3pa:d4m1 cvsulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an el4tt :u-g0ejfmectroscope positively?

  An originally neutral electroscope is b7o: vvu v95cevriefly touched with a positively charged glass rod. The vvucev75v :9o electroscope

  An originally neutral electroscope is grounded briefly while a positkl+n.gx +jdyx2; ph*wively charged glass rod is held near it. After the glass rod is removed, the elec xl ;.+*hx+ygjpwk2dntroscope

  A positive object touches a neutral electroscope, -zaqipop)80 ke26ll bt9j63pr gcbg* and the leaves separate. Then a negative object is broug 8czbbo0tl- qrk)p66ppj al9 2gg*e3 iht near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. srgzkz3y;wi1(xm+ o) 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 zzs)g1kr(3oy; w+ mxi 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 constawse(1 -f mxu0ant $k$, which appears in Coulomb's law?

  Two charged objects are separated bc05,t netfhb00/8hqc a2 mauyy a distance d. The first charge is larger in mag0bf5 qa8h0/ m,ue y2ncthtc0a nitude than the second charge.

  Sphere A carries a net charge and sphere Biaqhtc7.fngf sd )z. 9 ho90g: is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force betweefgtsadongc9 .hq0: z)7.9f hin them?

  Two charged objects attract each other with a certain force. If the chargm* (lt4r qm.n:c.gcgies on g (*i4 tmm:.rclcnq.gboth objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attrac fr6 meaki23uetg mv:1 (5zqn:tive forces of F on each other. If the charges are separated by a distance of d/3, what are t 3: iague(25rnz6meqv k:mf1the new mutual forces?

  Two charged objects attract each other (ezsg80g2 wifwith a force F. What happens to the force between them if one charge is doubled, the other charge is tripledfgie(0s8zg2 w, 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. What hapruaqp,; jo *s9u k5mga eohm85fuhn::n3a:7wpens to the magnitude of the force on the proton if a second e:ou95 ,a:oksgm:mwah3 5;e* npuh au7f jnqr 8lectron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happeng) .zl/tq:g ins to the magnitude of the force on the first electron if a second elei :nggztql .)/ctron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to (pl 5utp6 p85srpj,e *bl m/bpthe size of the force on the proton if the electron is mopjm(publ 558 pbl/6p*rept , sved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When dyyg 77fe p( 1td5zs 4:gthdv7a 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 actsh 7 ye1:dsfy7t(4gvgpz7td d 5 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 equilatq;z 6r zombb9 -.jc9pyeral 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 formb; obpz.j6yc9q-z r9ce 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 vectk32hxe; by9 sc(iz ;qs .4cjfuor?

  At twice the distance from a point charge, the strength n 5xl,gm l(j3mof the electric field

  Is it possible to have a zero electr,ys3 sse4 d5m83m wdyvf71s zlic field value between a negative and positive charge along l ve357 ys34sdsm ,y dms1w8zfthe line joining the two charges?

  Is it possible to have a zero ew wow/ 3xmj;nas .pt16lectric field value between two positive charges along .wwmpns3x w /a1tj;o6the line joining the two charges?

  Electric field lines near psitive point charg4zz0 /n)mbh *1acd3r/m dxmpves

  The electric field sh1qg(t c,n4xnyr q: kg0own

  Can electric field lines intersect in free space?p8 g zda7u;cn8

  A solid block of metal in electrostatic equilibrium is placed in a uniform e9+ex5e ioovy wc)3:r kv 6b6epl30 qurlectric field. Give a statement concer+) 6ux5co3p iwlq6ve vy3re0er:bko 9ning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equali,853ledqab5uk+qm hai osx/x7 +r4e diameters are each given the same charge, the electric field (E) midway betwee rm l7i8+eqb+si d/kxhxau35ao ,eq54n the center and the surface is

  A cubic block of aluminum rests ot-f6ga x.j +gd-9a0lm9qgzu jn 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 surfd9+06q u-jf jxg-la9ztagg. mace?

  If a conductor is in electrostatic equilibrium near ar. 3 4p .b8daab(roxaen electric charge

  A positive point charge is enclosed in a hollow metallic sphete/;qq3.nt. * qowigpgza(1g re that is grounded. As compared to the case without the hollow sphere, the electric field atg o/ n qg(p3. t1qg*z;.iqewat a point directly above the hollow sphere has

State three properties of conductors in sta i7l-s:ih (hsutic equilibrium.

State Gauss's law.

  The charge carried by one elecr4p,d4xofcn 2 -u o-udtron 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 +2.00 mC. How ma ;k0xe8r/qmh11 iav qany more protons than electronsehv rkq81ax /0;iamq 1 does this piece of plastic have?

  What is the charge on 1cp5 w*0yo9* yzl,a vug kg of protons?

  An atomic nucleus has a charge ofd92dbwcj1iwapv8 x 8. $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated .+g18 oae+**r ecu7m noadjcw by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What iwd mc8a.o aeorc17e ug*jn*++s the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a0x (xrkgg-gi 0 second charge, and the force between them is 1.0 N. What ii( ggkrx0g0x -s the magnitude of the second charge?

  Two 1.0-C charges have a force betwee.d+i( l1*z*:3ivp givc opz edn them of 1.0 N. How far apart are they?

  The force between a m 6 hxf+c+z p.*wzpvt1$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially.5eq /kywj 4ps 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 c/ k p54jwe.qsym, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. 13d ; m/f-*ikya6liey gp0ar l 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. Wp eyiydflkr0l * ;136ama-gi/hat 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-a irmzbwilvb oud*mr39/51 (v)ip9 kl.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 t9.wivu5k/(zi)b 1 l3 *vlrb mi orpdm9he 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 follro7(*ywgvk n1g iw(9 rowing positions: 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 magnitude of the force on the 3.00-mCog w17wnkrr g(v*9y( i charge?

  A point charge of +Q is placed at the center of a square,rk 1c duqx(0d(.ivx y+ 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. Wh(.0v+x 1qxdicuy( rkdat 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 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is xt8, ( n2i/ 9nq0gtyujy s/zycat (0, 0). What is the magnic, /x y0nt tj nq(uszi892yy/gtude 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; (gbcu5hh.x:6 c-wocc)qlnq = 5.0 nC is at (0, 0). What is the direction of the net force on the qn;(5. c oxwql )6c bg-hc:chu5.0 nC charge?

  Three identical charges of 3.0 mC4 xnmh,p6vbo,jrb-) 7r qx6zk are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic foq,7)xj, xrbmho r6k 4nv-pbz6rce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separamiwv+j;0gadr)(l2- an z3 2k*esnqjl ted by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zeg *0z (jlnra)l3e 2qaws -nv i;+jd2mkro?

  A +3.0-C charge is at the origin and a +9.0-C charge is l: j15 5inkwx38+ga yz6swakiat x = 4.0 m. Where on the x-axa5w gaw53nk1k isi z8yj 6l:+xis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2re 6 z*9y-rp(nv qn.bqa. Where can a third positive charge +q be placed so that r 6(n rbep.y qn-v9qz*the force on it is zero?

  A copper penny has a mass of 3.0 g. A0n fl xf2p0yw53ivuo6lb , u*z 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 fori dq79zx,c,1 lknux9p(cxdqbpp :0a 7ce of gravity by the attraction of a fixed proton some distance above pcnxx p9qcb li07p9:qad,x ( ,1ukdz7it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting tik5i o:7jgm7m7b4uqy hreads which are 30 cm long. Both are given i:7bgq4ij 7mkm5i y7uodentical 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 charge of +40e. What is the magnitude of thloz/eb og.di4-v ,o+fvc+w8u e electric field at a distance of 1.0 m from the nucleouoiv8vzl4 ewf +b,-doc+.g/ us?

  What are the magnitude and direction of6( j5 c4pblqomrh8i5w the electric field at a distance of 1.50 m from a 50 lbq65p 4r(mhoi5 j8cw.0-nC charge?

  A 5.0-C charge is 10 m from a small test chft a0xs;0awf 0arge. What is the magnitude of the electric field at the location of the test ca x0aftf0w;0s harge?

  A 5.0-C charge is 10 m from a small test charge. What is the di,cm8e+qn 9 ktirection of the electric fi,et9+ icqn mk8eld?

  A 5.0-C charge is 10 m from a smalvr 6h 6.1lx5juaedr-u7 yx4spl test charge. What is the magnitude of the force experienced7rr6p1h.sl6uj45du v-xx e ya by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C ; kl90eucij seok +(i7and are separated by a distance of 4.0 m. What is the electric field at a point midway between the tw +c(se ljiik07o 9;keuo charges?

  A 5.0-mC charge is placed at the 0 cm mark of a me8)5qaeg xc2)t .o:cml7j qpcgr m*oo5 ter stick and a -4.0 mC charge is placed at the 50 cm mmxg8) jtp:52lc75.)*mq caogro o eqcark. 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 and )lkr58pl*-qypb ug2+a a gx d,3c,sdda -4.0 mC charge is placed at the 50 cm mark. At what point on a line jpas d*bd2yd5l3qgc rg la-+8kp ,)ux,oining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed a4 9m+l3 mdjv i edzw96vfyxk8-t x = 0 and x = 0.20 m. What is the magnituifvdy98zl -6w+me j4 vkx93mdde of the electric field at the point midway between them?

  Three 3.0 mC charges are at th.op5x..ucix jd8j5 rpdi i,c 6e three corners of a square of side 0.50 m. The last corner is occupied by ..oj5cud.8pi6djx x,ir5 pi ca -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 placed at thezj3keudo/b+j kvp*, 5 corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (+j ouv 5,jdzekp3*kb /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 electr ng0tn61 7)g dsigpbt4ic field. What is the magnitude gs4t1pb0g) tgni6 7 dnof this electric field?

  A particle with a charge of 4.0 mC has a mass oxgb iff/ln,3 j)hv 8y3f $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is plh2 fysr(b1b)taced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suryt 1sb(bfh )2spended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placev b+2 -z1mxlfxd inside a uniform electric field, and is suspen+ vl-xz2mxb1fded 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 magnih*r a 5en,6ozhtude of the electric field 5.0 cm from the spherazh*,5 h o6erne's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the electri3if8 bv:of7ig+2gi5e.rlilmii (jp / c field 6.0 cm from the center ggl+fo2 5bm/pif 3je:8iiiv7 ir.(il of the sphere?