State the law of conservation of electric cha /khoap q;i;2vrge.

  Is it possible for two negative charges to attract each ovlwx5rx zk. / cqx4*ui-8vs8uther?

  Is it possible for a positive and a negative charge to attract each other?9og i3z+8ab0hrt vx0b

  A glass rod is rubbed with a piece 5ucve3w ,8j)a6)cfve ;om vriof silk. During the process the glass rod acquires r6ew a fim5cvujvc; ,)8)ove3a positive charge and the silk

  A proton carries a

  The model of the ato )f2sm lc) .elnzzuh3,m shows a

  A neutral atom alway e,uy8 syws8(dn 93bivs has

  An atom has more electrons than protons. prmk x:nha**, The atom is

  Materials in which the electrons are bound very tightly to the nuclei are rcsu l(5/5 fog,ix hxa:eferred to :l5xg5ofxu cah/, (si as

  Materials in which the electrons are bolru2 r1a fuc:gb2oh :osui+8/und very loosely to the nuclei and can move about freely within the m c+sl/rou8u: o:uba gfr ih212aterial are referred to as

  A negatively charged rod is brought near one end ofle-j( poxm;/h.u2w nq;e (pyn an uncharged metal bar. The end of the metal bar farthest from the charged ro xqp (2uhne;(j yoe/.wnmp;l-d will be charged

  Sphere A carries a net positive ch,hvk je ;v;5odarge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correcov5e d;;,kj hvt?

  How can a negatively charged rod ch0:;rkxv,z r tbi9 m-pyarge an electroscope positively?

  An originally neutral e)lp q7of7aw:cu5, grplectroscope is briefly touched with a positively charged glass rod. The el,g)p5clup 7 o fwa7r:qectroscope

  An originally neutral electroscope is grssfu*t6t3b +3)bh vp qounded briefly while a positively charged glass rod is held near it. After the glass rod is remohp3s 6t)+vb3s*f tu bqved, the electroscope

  A positive object touches a neutral electr0.f2vmao alp9 oscope, and the leaves separate. Then a va29ma.pof l0 negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chg)tw 0s rm17if ufcd3(w(z- uoarged object 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 forwau-)1rsf0g3ctu7d( zowf (iw m rd, 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 swuhc*q;p;7qngmx , 1mmcyuuu3 81 3z Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The/h s00cixrr7 i first charge is larger in magnituderi7/ i s0h0xrc than the second charge.

  Sphere A carries a net charj8snm /0si vi2ge and sphere B is neutral. They are placed near eacv n 2misisj0/8h other on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each othera1gp fjy*zeb)jb/, . x with a certain force. If the charges on both objects are doubled with no change in sepga/f j.jbbxz y)* p,e1aration, the force between them

  Two charges are separated by a distance d and exert mutual 7;ullo zend)vgf4*j ) attractive forces of F on eacu )efjl4 vzd;gn7) *olh other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. Whateov,ti; 3.ul v 0; xn*ly)dkmm 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 original value0,nuevdi ltm;3o. l;)kx y*mv? The force is now equal to

  An electron and a proton are separated by 4.0uo gwtg 3-1gcp ; x2xhewroa distance of 1.0 m. What happens to the magnitude of the force on the proton if a second elrwpc.t;4 2eg31wog u g0xh ox-ectron is placed next to the first electron?

  An electron and a protohwt : 3aw-2rc ui-iso/8apb: vn are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electr8spa-w t:oi-c2vb: uh w/ia r3on is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hapw huuig4c,96bpens to the size of the force on the proton if the electron is moved 6wiguc4bh, u9 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a sq9bf:;v1symgiew+ja*ty a(; ij:*y mb uare. When a second point charge of -Q is placed at one of wyt*;:y (: biaajs j;e+f9mg vyi1*m bthe 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 pl6(spunu wt;;zdz s-imd5mo .8aced at the centroid of an equilateral 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 force that acts o8(us 5;z wz . d6tmsnm;i-pudon the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not (em :5j vgfb9ba vector?

  At twice the distance from a point charge, the strengthc ko )23w.8p1 orcijat of the electric field

  Is it possible to have a zero electric9r3 7csbm7hs4 aqtin1 field value between a negative and positive chargn cb qi3a 771mrh4s9ste along the line joining the two charges?

  Is it possible to have a zero electric field v*cpx0)8;o unu dezhv) a3m a-n2 0emucalue between two positive charges along the line joinzo)nea n c0xe pd2uvcum30mh;)-8 u* aing the two charges?

  Electric field linesdrd v/ga *fa(4(fybr) near psitive point charges

  The electric field shodkpm o;8cl m/ u/+bqejy-)4y8j x.ftqwn

  Can electric field lines interukhf r f:8)ku9q8cu( msect in free space?

  A solid block of metal wkhn b t e.fcj:5i*qmx7:s56,k rz b9min electrostatic equilibrium is placed in a uniform electric field. Givek isch5*:9nmm ,t.rb qkx:w bj5zf7e6 a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphywwl 2b72h so3q.k3zr ere of equal diameters are each given the same charge, the electric field (E) midhl 3yb27s wo.w q32rkzway between the center and the surface is

  A cubic block of aluminum rests on sf5 ri w7ta1ct. yu*d3a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on tsr753*.atyftd 1 cwi uhe block's top surface?

  If a conductor is in electrostatic equilibrium near agr we ,lxdz)i1qztl;h :4km(3n electric charge

  A positive point charge is enclosed in a hollow metall yndkn8k 234c)vm0q alic sphere that is grounded. As compared to the case without the hollow sphe8lq3adm4nk2v k0)n yc re, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static e 1lxma s()niz.quilibrium.

State Gauss's law.

  The charge carried by one electron v9tw .hg0q3 ai)rx*jris $e = -1.6 \times 10^{-19} \; C$. 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 mo)m,qqckuwfh* */ oag3 re protons than electrons does this piece of plastic f ,c)wq/mou 3q*akg h*have?

  What is the charge on6b:inc uat/p* gg3st, 1 kg of protons?

  An atomic nucleus habalh dtz/.g,; s a 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, have charge values of 2.0ds j4 d8 .bikv9st9eq9 and -4.0 mC, respectively. What is the magnki 9j.ts49qs9vdd8 eb itude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between th.gcj avtk-bjvrpd9 jaw j(t,o ( 9:b);em is 1.0 N. What is the magnitude ,b(wd : ;vjvgapot(b.c9jk-a tj9j)rof the second charge?

  Two 1.0-C charges have a force between them of 13 1btgkr.rd5 l.0 N. How far apart are they?

  The force between a hxf5iln7 wu swi(g27 hn1z4p fvz65 a.$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initialo4v wy uhyelvwb;//*)ly 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 bet/lyo;* 4/vy wuhwbve) ween them?

  Three identical point charges of 2wd* m .0w va06khaw,wnh b((;gdzzxmf8rr5(c.0 mC are placed on the x-axis. The first charge is at the origin, the second to the right at x r,(gw.mhh*(bmdww5a ;n8cafx6w( d00 zvzrk= 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 of +2nyju5e i9u y /u,/pk1y.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. e/nkj/u y,ypu 19yi5 u What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located atl,lpxr*sd2 r/0o kip; the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.xsrldk 2 pr;0pol*,/ i00 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 placed at the center of a square, and a secocfg(+y j 4f1a+t08w f9eft iphnd point charge of -Q is placed at the upperfth 1f+taijyw0fp fcg (+94 e8-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 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.ovo9u0g-)m ao9wyozuj4 n )e/0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the ne 9 m40ea/ ovugy-oz) )w9jonuot force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0)8tei:v *xytisw+v40 a ; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 4w * i t+ytv:0vse8xia0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3l*+q jtb:+vkfy 2xlo7uq(w5 e .0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts qv l+qo:52k7b+tjy(wl*f xeu on any one of the charges?

  Consider point charges ofedn )zms uuk93co7c7rgn a41shgcdo* *4 h:m7 +Q and +4Q, which are separated by 3.0 m. At what point, on a line betwem7ns7g)4sd4d m n* :ou3 9g1uoe7harcz hc*kcen the 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 at x = 4.0 m. Whu s aoj7f u)j(p-d1m)lqe /pqg4y4h1mere on the x-axis can a third charge be placed so the net force on itm) mfgol y)d-h usjpq71jq 1u4a4( /ep is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherpe:4lx:h pb5he can a third positive charge +q be placed so thaxehlhbpp::4 5 t the force on it is zero?

  A copper penny has avx v1m- g88ghg mass 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 the fo e15 8myb3dxckrce of gravity by the attraction of a fixed proton some distance above ik385 1excybd mt. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a,+mz 7v x(/nhb 01nq g1ggxvce 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 between the thrh+mzvg7g g(0 , xve1qn1c b/xneads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is b1+ jm37pocou the magnitude of the electric field at a distance of 1.0 m from the nuclj+p7obum3 1oc eus?

  What are the magnitude enop u4l8g-sm l2s4t *and direction of the electric field at a distance of 1.50 m from a 54 o4gltpl enss28-u *m0.0-nC charge?

  A 5.0-C charge is 10 m from a small tpt;fe94h bt e(est charge. What is the magnitude of the electric field at the location of the test chargfpt 4e(e9bh; te?

  A 5.0-C charge is 10 m from a sm/w ogtg */m-szen+x .nall test charge. What is the direction of the electric .e/t+gwsogn /zx mn*- field?

  A 5.0-C charge is 10 m from a small test charge. What y1 +rt wrf;j(h4bsu,(t pefv1 c1bq4lis the magnitude of the force experienced by a 1.0 nC charf qb +p1 1(eyu,rl v41htjf bs(r4cwt;ge placed at the location of the test charge?

  Two point charges each have a l( :ef)*uztpq7 pw mz9value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the tww7 e:ppq9 lz)u*zm(fto charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -7zc nxf2(0eqp 4.0 mC charge is placed at the 50 cm mark. What is the electric field at tx7 2pnqzefc0 (he 30 cm mark?

  A 5.0-mC charge is placed o xkn )-d10 sxclx-t-kat the 0 cm mark of a meter stick and a -4.0 mC charge is plac0- kxxk -txnsol-)1cded 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 placed at x = 0 and x = 0.20 m. vf i1b8cb-; kos-h*gd91qjopWhat is the magnitude of the electric field at the point m p-8*qs1ifh-doj;c1bkgbvo 9 idway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Toa8 vq uiy7eo463stxfh, 3aa*he last corner is occupied by a -3.0 mC charge. Find the electric field at the centfao*68e,u a 7qav soi4 3yh3txer of the square.

  Consider a square which is 1.0 m on a side. Charges arn pg+teq**l;ve placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1);qg*tn *lv;p+e +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 issqt +0dsac0 a1bgt26 f placed in a uniform electric fiel6tsb 0g0 t2+d csqf1aad. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a m4t(26re w. oy:sxoc wo,ysaz..p ,ail ass 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 qys; wjn7cyp 9dng,sck ,4zvhi 5 13y.an electric field of 6000 N/C pointing downward. What charge must be placed on th,h,yv cgiz9 7y nsk1.35sdq4jy;pnc we ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The balluazmc1lcu2p-uw; 2bhkj i + 82 is placed inside a uniform electric field, and is suspended against the foa+hm-b l p2j2wk281 cizcuu u;rce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a c,(3ia gl6,6 xo v11fjqe vwizoharge of +2.0 mC. What is the magnitude of the electric fiel vgl(ox6 a qf3wi6o1,,ejzvi1d 5.0 cm from the sphere's surface?

  A metal sphere of radius 2*p- tzbqbhp o 5,4c72mfro,+zkgx,cx.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm f,r,m2*+b k -zot7cx,hoc5pxq4b fgpz rom the center of the sphere?