State the law of conservation 6xrk.mb:( .s3sy zocqof electric charge.

  Is it possible for two negative cha0ws)3 fi o2dddrges to attract each other?

  Is it possible for a fpqg-1e, bk nhsrq6f/8uxzr99hmu55 positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of s2iz0kobk wf+tnk 7/py2 d6d,silk. During the process the glass rod acquires a posik 0,pd67/oibzft+dnwy k 22sktive charge and the silk

  A proton carries a

  The model of the atom 3ul7 dtwq-0 lqshows a

  A neutral atom always y2c :pm 9sc9qijz /l/chas

  An atom has more electrons than protons.aq/*r *vyrt .v The atom is

  Materials in which the electrons are bound very tightly to the nu /**brns 9e y k+btu-kn(njc2rclei are referred tnyns*eu2 r*r +b-(cj/bk9nkt o as

  Materials in which the electrons +:4/y 3m7hk tww9vhcvotv z 8vxhs6 (oare bound very loosely to the nuclei and can move about freely within the materialv3:(vvwm 4 k ts oxhh7z8/9votyh+6wc are referred to as

  A negatively charged rod is brought near one end of an unc)lni ;.y 50uvz2f ezhuharged metal bar. The end of the metal biy;0nz. v uh5 2ue)flzar farthest from the charged rod will be charged

  Sphere A carries a net positive charge,lu(dhsw )xd7jn 4l+0o and sphere B is neutral. They are placed near eac7xdlwjo)4(l +udn h 0sh other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chargh/t0 a8et khb3e an electroscope positively?

  An originally neutral electroscope is briefly touqiexro3rhuhg). + 85ro: p l,g bngd;(ched with a positively charged glass rod. The ele q)8;olegrp d5oh r.g3,b u rign(:h+xctroscope

  An originally neutral b ) fl1ypo++aa.u0sh)ug8mx7km*fau electroscope is grounded briefly while a positively charged glass rod isaf0p)am.g +*m)y+usa xoh 7k1uul fb8 held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. 5dir)aknx*5tr:ip( r Then a negative object is brought r)pnxi5 a5rik: *dt(rnear the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged o8 qq8 fa e 6n;6nlvbp8qe hbs6u-h/,fsbject is placed on an insulated table. 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. Whatb a6q,f6sfb eu /ne hn;-p8vlq88hsq 6 is the final charge on each ball?

  Charge is

  What are the units of hfem/xy2 k - edp,pl*+the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chkcj( 8;dsebbah yb35 e:( qnl7arge is larger in magnitude than thee;(8jc:(bh lsybbka7nq de 35 second charge.

  Sphere A carries a net charge and sphere B is -,7ag:xa0ha0au jncj t j pw00s0ybl4neutral. They are placed near each othe7b,s 4c-pu0aan h tw jjl00j0a:ag0xy r on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract ea qajwlg0ro:,0ei; .tich other with a certain force. If the charges on both objects are doubled with no change in separation, the force betwee0ii0r: t,aoqel.jg ; wn them

  Two charges are separa4aaby-q0m 0vtybat 4s;)wvp ,ted by a distance d and exert mutual attractive forces of F on each other. If the cha4-b;a4sawqam 0b0tyv), t pvyrges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attr:w3 6me olz-nwact each 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 one-fourth its o-nw3 ewz mo:l6riginal value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. Whhi+- n34cq 14apcmmpoat happens to cp-oh3n iq +mpacm144the magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dis.u*q cl y joyo.+g:vg;tance of 1.0 m. What happens to the magnitude of the force on the first electron ;l*gcog .y.: v jq+ouyif a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to r4:lum *ba.9 u g) hdi/c6vhgsthe size of the force on the proton if the electroidh)gaslbc6 rg.uu h: 4v */m9n is moved 0.50 m closer to the proton?

  A point charge of +Q is pl0 pqd6mo2j)q eaced at the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observedme 2q)pd0oq j6 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 pk6an 7lv 7 cvfcml/ l+.jpx13nlaced at the centroid of an equilateral triangle. When a second charge of +Q is placed at one c +xn a/j v1lp7l.m36 7kfclnvof 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 other vertices?

  Which of the following is not a vect- s .txczihwhx,vc4a-g1l+q8or?

  At twice the distance from a point charge, the strengtw*--.w r e uhef,iqg/s,hd2 eqh of the electric field

  Is it possible to have a zero electric field value betgrl*5 n2k cylcpi,z;s4a v:5dween a negative and positive charge along the line joining the two charl:kz*l,4an rdc ;viycp5s 52gges?

  Is it possible to have a zero electric field value between two positivwv* w9uzseaj; y a22m4e charges along the line joining theyw su vaz;m249e*j aw2 two charges?

  Electric field lines near psitive point charg.tet(ardlal n4+ d*:3 fmbo0jes

  The electric field shown sl5xar;e4/ zko90-f1hmey xn

  Can electric field lines intersect in free space? a9( kunmzg72)evqm+x

  A solid block of metal in electrostatic equilibrium is placed in a uniform ele4,gdwom 9 om(hctric field. Give a statement concerning the electricwo, 9mom4g(dh field in the block's interior.

  If a solid metal sphere and sw , 5ll+wxdzi /rhm;u lg(x+4a hollow metal sphere of equal diameters are each given the same charge, the electric field xh +lgl d,irs u 5zlm+(w/;4wx(E) midway between the center and the surface is

  A cubic block of aluminum 3t te6jji0 /vpy1rr: xrests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the chayr6tj:v/ xij1petr 0 3rge on the block's top surface?

  If a conductor is in electrostatic equilibrium.t /( nssbder- /2(tsptd)vbq near an electric charge

  A positive point charge is enclosed in a hollow metallic s hs0rk1:qzlvz-gx,7f2hcnh 3 phere that is grounded. As compared: z1-klsvchn0h gzf q7,h3rx2 to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in sgi7c qko 6yho5d o6.9qtatic equilibrium.

State Gauss's law.

  The charge carried by one electroa3 da7hdwti (p1- t*r;mg h(pyn 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 many more protons than elx+v:bu0 3s rbcectrons does this piece osb+r u0x3bv: cf plastic have?

  What is the charge on 1 kg of pr(we ey ,0f:zr e/af3xp npf1y3otons?

  An atomic nucleus has -uv1vt/c z t)e3x1 prna charge 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, hav0mamt0 7mlr5lm6 m 7zki d)qa.e charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forc0qal7mti )k.50l 6mmmzdram7e between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them (jly(9 9pvdl,gns c1iis 1.0 N. What is the magnitude of the second charge?c jg v n99,lydi(s(1pl

  Two 1.0-C charges have a force between them of 1.0 N. How dqn 1d .nye1r7far apart are they?

  The force between a 7a fsusjsc7--*wg en+$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ibdx7,h j1 3;hm4i vewwnitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betweemd41 ivbj7w;e,w3 hhxn them?

  Three identical point charges of 2.0 mC are place0 mc*;( vwp m gsbhb8+0mai h/f*,msrrd 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. Wh8sfb wb0,m hr*0sv(*ma/+gmhcm r; piat 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 ckeb+p; .5y hxfd1f9j/tl9st gharge 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 electrostatic force which acts on the charge at the orighd.;gs fjyl 5t9p1fte/kb+9x in?

  Three point charges are r 1; ypn*8p rgjupi+a/located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -jyp u pra+/i*1n8rg; p1.00 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 sq *xuh c1 qcwbb.;df.v*uare, 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*;.uc.bdwfxbv1q *c h charge at the center. What 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 i8:y:rhy ow 7cbs at (0, 0). What is the myrh bo8w7:: ycagnitude 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 a:s7.argx/ tf*ivqb92d( rq zsnq/ yu.t (0, 0.10 m); Q3 = 5.0 nC is attu.(:2fg zbrd/aqyn .9s */rqvqi7 s x (0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are hkz d(6uta 8(rplaced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whichr (taud8h6kz( acts on any one of the charges?

  Consider point charges of +Q and +4Q, whih3afrk,p p.: gbw5c:c ch are separated by 3.0 m. At what point, on a line between the two charges, would it be possible top5f .wbr,:h: acpg 3kc 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 +9z) a(y)ab +yjz6s-lt 8tslum2 .0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is ze 2)+t (8amyztyb -z l)asjsl6uro?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wheg2ts+mkm 9o) qre can a thirdgo+s2 mq mt)k9 positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass ofbocnx)7h(/ 6pq/llld 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 the force of gravity by the attra: alpy /,yxua-ction of a fixed proton som/yauxl,:- paye distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconf6g+oiji : rx.ducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betweei x+of ir:6gj.n the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +rshm--f8 (0y4o rls)yl mdv*jtr31 gb 40e. What is the magnitude of the electric field at a distanch 3jmr)-( 401rslt8*dfm vgsb -yryole of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fieldy aaln1g c x:7d8j ti43p2tmq: at a distance of 1.50 m from a 50.0-nC yag xctmij d:p1:4tl73a n28 q charge?

  A 5.0-C charge is 10 m from a smallak.; hu u1t(d7u fai6q test charge. What is the magnitude of the electric field at th7q kt(ai 1afuu; d.6uhe location of the test charge?

  A 5.0-C charge is 10 m from a small test chargemy/*hxv +- km+: aeijk. What is the direction of the electric/+* : kakej xmvyhm-i+ field?

  A 5.0-C charge is 10 m from a small test charge. What i.x+s5yq:8 w1d daomhe5l 7igyw-w) q hs the magnitude of the force experienced by a 1.0 nC charge placed at the location+wgx8i.q-) yw m51: oy5wq7laseh ddh of the test charge?

  Two point charges each have a value of 3.0 C anddy ls;pg+tv8;tz6ln xco167o are separated by a distance of 4.0 m. What is the electric field at a poi6zl;d y;g 7vct6 1 pxo8sont+lnt midway between the two charges?

  A 5.0-mC charge is placey2we+,3d isacd at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 3iewyasc2+ ,dcm mark. 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 p*gya reo*m( 0stick and a -4.0 mC charge is placed at the 50 cm mark. At what point *(ygoeapm *0 ron a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7. j lnqg km4b aerb:-3cj9+k ,+tya5f1(lj4mvh0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude(l4m1c: kfr-a5jvbeq +ya 9h jlgtjb k3m,n +4 of the electric field at the point midway between them?

  Three 3.0 mC charges arer:1t rc;3l ./q e ydpm/we1yna at the three corners of a square of side 0.50 m. The last corner is occupied by a -3 1t q/c rem1wly./nady:3e;pr.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chafx z5,bbgcw q7 gd7e31u u2jr,rges 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). wz7,xgb1j 3u 7ge ,ucfb52 dqrWhat 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 yvv/ybnj 5jj6v9, g1bin a uniform electric field. What is the my/, n 9j5vjv1yb6g vbjagnitude of this electric field?

  A particle with a charge of 4.0 pk qj8bbe7)7p 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 +hggh qe:pvowt 0v q.gif20c ;i0yj/0 electric field of 6000 N/C pointing downward. What charge must befg.ow00jivgi02p qyvte0 +h /chq:g ; 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 1te5hlao.*4bbsr4 o f placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude slb at4ebo1oh.*54f r and direction of the electric field?

  A metal sphere of radius 10 cm /w.nat xzx3lnz+df6k0jbu3h -d ne64carries a charge of +2.0 mC. What is the magnitude odn46/ unx-.jl b+a z3fn 0hw6zedk3xt f the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radal 9phipyr+-g xp1w6;98fkuh1+ drrq ius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the ce;iqhk61d8rry gwp +fphal99u+xp -r1 nter of the sphere?