State the law of conheu5su 9o2one1dn b- ;servation of electric charge.

  Is it possible for two negative charges to attract ea3n+q x ot63kxnem7:j,4hx7h a1 g gmxych other?

  Is it possible for a positive and k( uwq(lxwe,2cr14ot a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the pr(9g 7g,vd3at ff g+mclfmt(* uocess the glass rod acquires a positive charge d fmg9f3g ac,t *v7ltg((m u+fand the silk

  A proton carries a

  The model of the atom k:3xw3qth*cz5wj6 gb;x: s i fshows a

  A neutral atom always xu; f 1 /ph8xtj(x+1(fcm.fsho jo;zy has

  An atom has more electrons than pro+,g9b tkbt9 7u;;rxy apiroh4tons. The atom is

  Materials in which the electrons n 318(w (fl ;gwigzyqneg3 we.are bound very tightly to the nuclei are referred n38 (3g fq 1yzwgwe.wgine;(lto as

  Materials in which the electrons* xj8-jvcquxcce:ti y. *f 4y- mum1i6 are bound very loosely to the nuclei and can move about fuxcx.ii*:tjuqec*v- fy j18y mm6 c4-reely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. )tevwi9.74ju mdg x w. The end of the metal bar farthest from the charged rod will be . ev)7d4wuj 9wg.ixtm charged

  Sphere A carries a net positive charge, and s vj 0fpuc,-2h +ygp9plphere B is neutral. They are placed near each other on an insuvlp-2juyp p+f ,chg0 9lated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscopeii 068o062wnshtdfkj n3er3k positively?

  An originally neutral electros+b9z0frt u3okcope is briefly touched with a positively charged glass rod. The electroscout 3 rk0zfbo+9pe

  An originally neutral electroscope is grounded briefly while a poou3-lle1v, k 6dw kt0ssitively charged glass rod is held near d3ok u-w0le,ltv6 k1s it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sep;oy :9wl-ck,*kim j htarate. Then a negative object is brought near the electroscope, but does not touch ito hyiwl9k *-j :tckm,;. What happens to the leaves?

  A large negatively charged object is placed on aoyv,g x112 vygn 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,2 1vgvgo,y1yx 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 thenbl25a;8xew e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. b w/8hzvsju k5;-j9dhThe first charge is larger in magnitude thajshh;-/ udjw 95 kz8vbn the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near ea2rfh;rez qc, sn-)nm 8ch other on an insulated tabln )s2r,fn;q-ezh mcr8 e. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with k)b19u. 3iypjan ft/ra certain force. If the charges on both objects are doubled with no change in separation, the force betwee9 nij3r1 )y ak/p.futbn them

  Two charges are separated by a distance d and exert mutual attrl6nb2adh 7 -s;gm,d p malnowfv22 +0factive forces of F on each other. If the charges are separated by a distmlmf2f-oswd7 aag v,d +l26p0n2bh; n ance of d/3, what are the new mutual forces?

  Two charged objects attract each oqn2sz62h 8( hki;uk avther with a force F. What happens to the force between them if one charge (a nkk qh ih2uzs8v;26is doubled, the other charge is tripled, 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 pro4q*i5m /aqpc nl86 fouton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first eqq o8ia4fl*c5u m6 /pnlectron?

  An electron and a proton are separated by a distance of 1.0 m. Whg2veu ie ).z+ m,rpvb:at happens to the magnitude of the force on the first electron if a second electron is pla)re ,+.:vpbmgi evu2zced next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to o qfrt2d)265/i rhmac+ 89y)ynm iey othe size of the force on the proton if the electron is moved 0.50 m closer to the pim r)y)9feyt/5nd2yo6m2hqcir + ao8 roton?

  A point charge of +Q is pla9 : h)glfxl1ez8oh:iqced at the center of a square. When a 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 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 9g:oi 8f1h q):x lhzelforce acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the cen0x ,b)y ;hdqhatroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostathxab ;d q0h)y,ic 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 isefy k g,)lfp mfxk*8j( ())udt not a vector?

  At twice the distance from a point charge, th ha6g7+o:)pz.i3i 8 qtzkf adye strength of the electric field

  Is it possible to have a zero electric field value between a negatd8jbz7;8 g 25j8aj 7hbluptkjive and positive charge along the line joining the two charge58bp8 h jj;zu2g 7j 7t8alkbdjs?

  Is it possible to have a ze9+z6uv)qbcvp ry31xb ro electric field value between two positive charges along the line joining theb3+6)p9r vv bcux1 zqy two charges?

  Electric field lines near d4qcl 1zqt+5o psitive point charges

  The electric field s5ewpl/5bp7t9z x3jwcns itn+d 1n,h/hown

  Can electric field lines intersec z v-k yzyyl8b*lvipl;;-e bg1 )ll.o5t in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform ;igz t,y92sb;qp 2i wnelectric field. Give a2pt yibs;n;iz9gw q ,2 statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere oz;/li cbnbb5u+zz)w4f equal diameters are each given the same charge, the electric field (E) midway between the center and the surfacu+)l4b z;z bwib5n/z ce is

  A cubic block of aluminum rests on a wooden tabl7vvi .flv css/qc)hn .5:vz xdon+s20 e in a region where a uniform electric field is directed straight upward. What nfc hcvzn7x+:q.0 5o/ ss.vidlv vs2) can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic o xyl.du/z. u*d, 0k pgwo*;orequilibrium near an electric charge

  A positive point charge is enclosed in a hollow metalll cc*, 5mizaj5w,y:kon/wuap-1x q y6 ic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a pointxu zak6*nl/:wpm q,wo y, 15cyijac-5 directly above the hollow sphere has

State three properties of c7 * clhv5h--zny l2dtyonductors in static equilibrium.

State Gauss's law.

  The charge carried by one ele .t0+8yz7yjto o( uhmhctron 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. z1ymh7r + jz,yHow many more protons than eleczrh71 +zym, jytrons does this piece of plastic have?

  What is the charge on 1 kg of protonb :cqv3l91azpa5c9l ls?

  An atomic nucleus has a -ta +irv h4cz/charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, s ny8ti3ke)/k(kx( oxgeparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is tkykk/ g(i3x(x noet8 )he magnitude of the electric force between them?

  A 1.0-C charge is 15 m ;pwkm*.3 jebn i gjo,4lzq q-1from a second charge, and the force between them is 1.0 Nj*qmwp.kq3 l,4 ezgn;oi- j1b. What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Hho98nfs9k wn :ow far apart are they?

  The force between a 6 y9f0f-kavk,3ljit o 0wq:av $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apar dn75j6qnpf n5t, experience a 1.0-N force. If they are moved to a new separation of 8.0 cmnjdq 65npfn 75, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first ch8pp 9 nx36akzsarge is at the origin, the second to the right at x = 50 cm, and the s xp6zp9kn a38third 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 mCxddl3 c/.f uo; 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 directionld d u3/.fcox; of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positjfm(gyw)/z f sixdy346s:x;c rs9p +wions: 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 xcmzw9 d (ss :r ipgsx+)w63/ fyyfj;4magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square 3+ok.;tt0oghz kr-d p, and a second point charge of -Q is placed at the upper-left crt0;o.- t zk3o+kdph gorner. 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. ig1i tk7x25 vtq95qml0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on tt7i1ml5q iktq 9v2x5 ghe 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 is4s 4xnfdts+ic9; f-ff( e:s ag at (0, 0). What is the direction of the -af4ngx dfisf+s9t;:4ce sf(net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC agfywyf issn(-l2z*bo 6lj4- 3re placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic forcezlj3 4 si(6o lgfwy-nsf2by-* which acts on any one of the charges?

  Consider point charges of +Q and +4Q, wh9;-kgre9;xuxuru ., zdq z. jaich are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -u,.;zg x.jk9z; 9a drqux-uerQ 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 =+ bw7c8fwbr ww7hq1:i 4.0 m. Where on the x-axis can a third charge be placed w8hw +7 iwrbfbc1qw7:so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placsmr/;g +y cg06u dasn7ed at x = 2a. Where can a third positive charge +q be plrg/;0 +s7cau gm6dnysaced so that the force on it is zero?

  A copper penny has a ma u )ospthyrj2a- /(4znss 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 force of gravity by the attrac-0 .zjoeoz ylx)g e,8ction of a fixed proton s e- ceoo0z,x gly.)j8zome distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a cvi)hyp.t+i )cp b) or); xv eu)ub*0zsommon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betweevz 0)) *; buo)ihvubesxyp+pic .tr))n the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +41:k21 ,ah ibsc:svu 9q6 fn)mw ryea-e0e. What is the magnitude of the electric field at a distance onv1 ksee 9w2, a:-)au16iqs rcybh m:ff 1.0 m from the nucleus?

  What are the magnitude and direction of tz4j pi du.+1tghe electric field at a distance of 1.50 m from a 50..dz1gp ju4 ti+0-nC charge?

  A 5.0-C charge is 10 m zmpf5i m 2v+0vfrom a small test charge. What is the magnitude of the electric field at the location of the test charge0vm5fv+zi2pm ?

  A 5.0-C charge is 10 m from a small test charge. What is th3cw5acpi v x w:f,4nmvyfc, -8e direction of the efc- :w8cyv,cnm,ai 3fv xp45wlectric field?

  A 5.0-C charge is 10 m from ayfapi-x uuk;r a+w8 fj)y9y,i c;v9h- small test charge. What is the magnitude of the force experienced8)v;ax cfk ,+-ju9y9w yipu i;ay-frh 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 and are separcup6 ey*j 0ls 1 m98r7up0bnykdmh.2rated by a distance of 4.0 m. What iuyk ry8ps lmr9210b* 6cjn.uh 7m e0dps the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at j 1k8i;kfjtyw0 b7rv9*mjn h3 the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mark?bk9f r;*ijv8j3y mthjk7nw01

  A 5.0-mC charge is placed at the 0 cm mark pk/ok3e7c j a (tcnl:, :tip4nof a meter stick and a -4.0 mC charge is placed at the 50 cm mark. pklp tcneji,3kc7/o:ta 4 n :(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 place61a8 5;ev5ru hpoj elod at x = 0 and x = 0.20 m. Whu 81o pa;lo5 ehv6j5reat is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the t -h-z rrork3t.;o ozbv:)kxpe2m g3/ jhree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at t-)okzt2r. ;xo je o:mzkhp3/rvg-b3 r he center of the square.

  Consider a square which is 1.0 m on a side. Charges are pl zziop60 w t3-mfamhyy(;,)gtaced 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 the square's centerhwzy)t o,t (63pgmmi-0ay;f z ?

  A force of 10 N acts on a charge of 5.0n rb*.18yb eez mC when it is placed in a uniform electric field. What is t z eebnyr*.b18he magnitude of this electric field?

  A particle with a charge of 4m9wh8tno, u) h.0 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 ele /4qdv)tie 1lh0iu8e1lfb 6sd ctric field of 6000 N/C pointing downward. What charge must be placed on the ball fo d l 0s1tu h/df)el6i18ei4bvqr it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2d s:)zi*s se/r6p;1c utf7rqjxtg+6w .00 nC. The ball is placed inside a une 6sz;r cs*ji7ft+xp/wr61d qu s)t:giform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm cpy1,6rru1u hywx p y t:0 6:oo1ewogh1arries a charge of +2.0 mC. What is the magnitupu 6eyyhr1gthr ,6o1p 1uw:y1o w:xo0de of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radiuszzhzhb0fz4.82* -hg2ee s2he en+oy u 4i8 kwf 2.0 cm carries a charge of 3.0 mC. What is the electric fieu hfhne we -o z42b zk2*gzyfzs.eh8h408i2+ eld 6.0 cm from the center of the sphere?