State the law of cony. cbvtu+a o9ap3y8ek 18mw m7servation of electric charge.

  Is it possible for two negative charges to attract mo-7 bzq9y)t2w5 sv/rx3yq immh0hh+each other?

  Is it possible for a positive and a negative charge to attract each other?yy x()mxn4y;ck u8n9u

  A glass rod is rubbed with a piece of silk. Duringt1 z r,+ksd)g bhs* dks11:2yb,wicru the process the glass rod acquires tdzdw2u ss s i,1y11:krkrbg )c+bh*, a positive charge and the silk

  A proton carries a

  The model of the atom-jbi )h(ic a3v e9m1xbes84 8tceeez8 shows a

  A neutral atom always hai zx ltl8qf:,wxunl;3j/. 0gg s

  An atom has more electrons than protons. qf h1jf1juf9je7 d-8fThe atom is

  Materials in which the electrons are bouln ija-ei/4r/2qn snu/:1 g wtnd very tightly to the nuclei are referred to tr:iae n1sl/qnug-4 2/ji n/was

  Materials in which th4 a j7wi4jp.cbc0cm;c :caiwz m22u+ze electrons are bound very loosely to the nuclei and can move about freely within the mateau0wam.; j zcc4 2i m:+7zijbwpc2c c4rial are referred to as

  A negatively charged rod is brought near one end of an uj n3fhw,*8begty;8;t-fmzkgi2x1 f sncharged metal bar. The end of the metal bar farthef 8t2f y1i;gmsg*, k;wzxj-n 8eh btf3st from the charged rod will be charged

  Sphere A carries a net positive charge, and spcra9-bjj tc2 o +z0qv0here B is neutral. They are placed near each other on an insulated table. Sphj2rj0 z q9+cocavt -0bere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge idh usq-giy,;s(l87vh t ,.rian electroscope positively?

  An originally neutral electroscope is briefly touche5x2tldv1) g6j)yge yqd with a positively charged glass rod. l)t v1 eg5djxy2q6gy)The electroscope

  An originally neutral electroscom qatz,ial5mot 4iv* h7xa4 j/71u*xrpe is grounded briefly while a positively charged glass rod is held near it. After the glass ro4* lv5h at 1 i47xaxqirja,mu7*tm /zod is removed, the electroscope

  A positive object touches a neutral electroscope, a w)lx8le33y band the leaves separate. Then a negative object is brought near the electroscope, but does not8 al yxb3)3wle touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tablesh +5fe)jh r9wole5.k. 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, .ekw5 j5frl+)h 9oshe 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 Couloo(4+bfe( hdzxuc:c, ymb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The p/.vely od(l9h :dto8first charge is larger in magnitude than the second c:o o/dyv 8telp hl.9d(harge.

  Sphere A carries a net charge and sphere B is neutral. They 5) lqi*7 8lg4ri6mr a hh/pchekdstxuw8:9b6are placed near each other on an insulated table. Which statement bes4*:dh8m cgr8xe7sl/5w 6i9tbakhrhui6l ) qp t describes the electrostatic force between them?

  Two charged objects attra i0x:8o4a+ knbv+ks ltkpf1s( ct each other with a certain force. If the charges on both objects are doubled with no change in separation, the force betw8+s0t p1o:slibk nkvak f4(+x een them

  Two charges are separated by a distajypw 73vk4*jsh lnj l7q0a; y3nce d and exert mutual attractive forces of F on each other. If the charge q psv43;* 0n y3jw7h7lakljyjs are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a foruuc89tb. poa:ce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distancucouba8: .t 9pe 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. 3*ljxqyggxb buzw5:pu77x ,+zsp;.lWhat happens to the magnitude of the force on the proton if a second electron is pla7+ uw75:xxp pbquzyl3j;.lz g,bx s* gced next to the first electron?

  An electron and a proton are sepac h5 h+(dczooso/gh6 g9p(h9 wrated by a distance of 1.0 m. What happens to the magnitude of the force on the first9c(c5 9hg/ph g6ozh+ho sw (do electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happki-6;v illi 01 umdt--fe-jxsens to the size of the force on the proton if the electron is moved 0.50 m closer 0tmsli x-6-vl--ij1iu fe d k;to the proton?

  A point charge of +Q is placed at the center of a squam9* :d:cyrieyre. When a second point charge of -Q is placed ai9yd:ey* r: mct 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 square?

  A point charge of +Q is placed at the centroid of an equilateral trmgj-h knls v;xr(hf o, ag4(033 4kr.idxbsa6iangle. 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 force that acts on the center charge due to a third charge of +Q placed at one of the o k,rm3xg n. or-(bd 43lgsi;s46v jhkahxf(a0 ther vertices?

  Which of the following is not a vec:x j* 7jczbpkoe8e5+wtor?

  At twice the distance from a point charge, the streng45h.*8 p gi3rafqne 7.tv qgiath of the electric field

  Is it possible to have a zero electric field value between a negative and podp7r(9;jdea r(alwlpt 14knaz/ y 9g, sitive charge along the line joining the two caj9r1/lp9p nek ;(dya,lg r4(dawz t7harges?

  Is it possible to hatx5loonx to./x :x/4 bk dt3qzvjn: --ve a zero electric field value between two positive charges along the line joining the5. x-tjko4xbq: oo3zdtn-vx/n :/xlt two charges?

  Electric field lines neatla1pb08 :rpt r psitive point charges

  The electric field shownct +f9inhf8nu,z4b .sxf q-d5

  Can electric field lines int8m vwrt+g r1*zersect in free space?

  A solid block of metal in electrostatic equilibrium is plac ezk tdaoj- w7f;:35hqozdi(k:sb: c6ed in a uniform electric field. Give a statement concerning the electr:sk;:wi3 ot7:ef dd -j(o65zkz cabqhic field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters arq -hd.4ej rcd/a8-bh4njguh*e each given the same charge, the electric field (E) midway between the center and the surface - 4hn/dj4h-bg.rh*du8jae cqis

  A cubic block of aluminum rests on a wooden table in a regio8ry ow91b ihu8n where a uniform electric field is directed straight upward. What can be said concerning the chargb8uhyowri9 1 8e on the block's top surface?

  If a conductor is in electrostatic equilibriuq(:gqe 4k k)bfenp2f.t 2a4zw m near an electric charge

  A positive point charge is enclosed in a hollowvz k4( oo0u73l lm7cow metallic sphere that is grounded. As comov(l 7ok4m 07w l3ucozpared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductor3phzeq:vuky c; s *.9es in static equilibrium.

State Gauss's law.

  The charge carried by o :p9cm 9oauf5xne 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 charge of +2.00ww-6)lsln.npttb tq 53x5gwj- 9reo 5 mC. How many more protons than electrons does this o 9wws p-t 5-.qn lnxgr5jttbw 56e)l3piece of plastic have?

  What is the charge on 1 kg of protonswm htbi9sr0l+6w,a9gfi t )t,?

  An atomic nucleus has a charge ofpktaa,0 /5;kohk bb 3v $+40e$. 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, r fx 4h8;kfp8mjespectively. What is the magnitude of the electric force between them?h4;8mjk pxff8

  A 1.0-C charge is 15 m from a second charge, and the force between them i.6i: g4wy)3vu8ofn r kdmntw5 s 1.0 N. Wha rv ou.6n gw5)w4ikm8dn 3t:fyt is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. H4q9 gnzuk/d p-ow far apart are they?

  The force between a i4swkpk pzb+;e3cmg:mn9odh3;6 j 9pw-wgy/ $30 \; mC$ 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. Il0pjkwz r )3ip ,j25i. m0.pnx38tqp ckdzl4nf they are moved to a new separation of 8.0 cm, what is the electric force be3jl0)pw p5np8 rtk jikn4 i3lp ,z2q.d mc0zx.tween them?

  Three identical point charges of 2.0 mC are placed t0c(z vs 4s f4dd5 rz*t)pd1-bs nix*eon the x-axis. The first charge is at the origin, the second to the right at x = 4tn1*zf5rt4xd( sseid-bpcz vd*s )050 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 of +2.0 mC is plajs-m u +r.ia( o, -nbgpnhh*z7ced 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 magnitzhh.7-s*oaj+r n, mibup(- ng ude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are lok tr:j y yiuvm4373vy3cated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 =r v33m3 4k:7jivy yuty 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-mC charge?

  A point charge of +Q is pb v) ,+*h6q. dihfeadblaced at the center of a 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 oha.ivb +,*deq b h)fd6n the center charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.tu.yx 9os01eql9yc)l 30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is t0ceu 9l.s) xl9qyy ot1he 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, 0.1)eeen+4 :haj.m:uf ;x bcxl1w 0 m); Q3 = 5.0 nC is at (xewxjb1; .ec)h+f :aen 4 lum:0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the8mbt k;lt4*xj) vg2u u vertices of an equilateral triangleu j*48m2 ub)gttklx;v which measures 30 cm on 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 ar4 z/l+ di.ftnv o/xg9+ ey.slfe separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q sue.n+o4 tglfx f/yl+zi.9 /svdch that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the originl8o).i6z4mri 1t dwxu and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge bemlx6d1rzit)u 4 8. woi placed so the net force on it is zero?

  Charge +2q is placed at the origin and charg0yn2aivk* ;xbq07cii e -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it isyqn*a c7ikxi2b0;iv 0 zero?

  A copper penny has a mass of 3. ts zod1i.6/lgtpc8x :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 attraction ofrfz f8a 5jb21q a fixed proton some distance above it. How far above the electron is the proj2 8a1z fq5fbrton?

  Two 0.20-g metal spheres arejz0 j:m6jtc a0 hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betwe:j06 mjac0jtzen 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 the elecd, d*2sdha0ydw*n5dp/h uw.i; ;wrr atric field at a distance of 1.0 m from therw.y*d ;0d/,*wirdh hdp das52an wu; nucleus?

  What are the magnitude and direction of the electric field at a distance zb f:zdu.(s9zof 1.50 m from a u:sz zf(.d zb950.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What isn3i-o-v e7heq(p ajb k;jawc8 *k5*ch the magnitude of the electric field at the lo;7cj-c*k(p j ikwa-e5 v8be*ahqohn3 cation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is z- ;*su4q4gff yvw+lkthe direction of the electric fies-u4yq4 v;z*fg wflk+ld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude 1 9m/ jcnpl.vdcc32a ,eie cryh3w95 aof the force eme,n vlecj/rchw ay9 3di p.cc129 35axperienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value o(lj 4sysg92 uif 3.0 C and are separated by a distance of 4.0 m. What is the s4i jsl(u2yg9electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic,kh :nfbq(a0z k and a -4.0 mC charge is placed at the 50 cm mark. What is an: 0,hqf zk(bthe electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark e,r bl0vsses w0 (; ,l57f; gupg)dkofof a meter stick and 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 z5 ssgoe;b e ,7s0flrl(df, p0;)gwkvuero?

  Two point charges of +3.0iq lwk9 nflncu 7044c. mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poinnwl7q l.0c nkfiuc494t midway between them?

  Three 3.0 mC charges are at the three corne9 tq- afj:vb;prs of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the centf-9abj :vqt;p er of the square.

  Consider a square wh v8v3qnz0wf d as)s0y(ich is 1.0 m on a side. 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)ysa v)wz0fd3s 80qn(v; -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 1a :ae p9,v*jr9wpvs6cve,a q of 5.0 mC when it is placed in a uniform electric field. What is the magnitaspv9v, ve 9:aa rw, e1c6*pjqude of this electric field?

  A particle with a charge of 4.0 mC haje r)fn5p .l0es 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 6000 N/C potg*+kfuvx u 8,om2k w5inting downward. What charge must be placed on the ball for it to betug8 2,kwvomu*k+x 5f suspended?

  A foam ball of mass 0.- p;f2 rehl plcebt2omlike-m(8168k150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of thp(flkl62-r e h1 2 8 -tm;lkcmepo8eibe electric field?

  A metal sphere of radius 10 cm carries a cnrk 18yiun*10. oau zpharge of +2.0 mC. What is the magnitude of the electric field 5.0 uka 1pyou0ni 8r1*z. ncm from the sphere's surface?

  A metal sphere of radius 2.0 cm car:k -u 1-sm:xgroc+ w,e(x ap5 wb/hqbkries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of th weq:rx cog51s, a:/p(-xhmu- w+kbkbe sphere?