State the law of conservation of electric charge4a e73eb+jn cz r6n(ny.

  Is it possible for two negative charges to agzqo nq:e,6f (r5,wadw 2oo;/g v*n gnttract each other?

  Is it possible for a positive and a negative cl tv 9ige0;v,f+7vca n 6n5dlcharge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass roefzr7pf *6,qd d acquires a p z *,qprfed7f6ositive charge and the silk

  A proton carries a

  The model of the atom shows 5 y3vz-wdoii8 a

  A neutral atom always0wffw q:ht,tv9bk p() has

  An atom has more electrons than p po ym0e4sr-c,j ip6e(-qr y+xg7a:birotons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei tt r,ket 51s/nare referred tot/k5e ttn,rs1 as

  Materials in which the elebxv7qns3d6 hyxq0 3rix. 0s /octrons are bound very loosely to the nuclei and can move6 .30s/o x qds3i7vbx yqnh0xr about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal 9;*wcm+mtrx,t6v aurbar. The end of the meaurt m;c6vx t9r mw+*,tal bar farthest from the charged rod will be charged

  Sphere A carries a net jtp.ey3sh96t . 8mkwrpositive charge, and sphere B is neutral. They are placed near each other on an ins 69r..ywt38psehj tm kulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged ro;k (.mlmjoeeep. d h(5:4eev vd charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively char5up zrxh30)g,k-cgl t ged glass r 3khu )-pg5xt grcz,l0od. The electroscope

  An originally neutral electroscope is grounded brie7 (pcquzu48isvoa 56 cwbt88 y7,zxowfly while a positively charged glassbc8w57t(ooiqvu azc87w8p y 6usxz, 4 rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches :fxar5v( n::g tsigt,ybu2 y6a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What hap:t (iny5 xab ygug2 t:vf,s:r6pens to the leaves?

  A large negatively ch f 7)hpk.b0 .:tgbcvelarged 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 forward, but does not touch the negative object. At no time does either ball touch the nega:p0k )bh bvltc.7.g eftive object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb cowwqk;sez( 2c2 nstant $k$, which appears in Coulomb's law?

  Two charged objects are separatzwh4 0 z:szqe0( na3basa0k j:ed by a distance d. The first charge is larger in magnitude than tan0 saw 0ejbzz zhsa:q:0 4k3(he second charge.

  Sphere A carries a net charge and sphere B is neutral. They are rg 9qx-p,cj9sg56gecn* j0z b4akty1 placed near each other on an insulated table. Which statement besc xyj59 qag-cepkg 6b14stgn9r*z0 ,jt describes the electrostatic force between them?

  Two charged objects attract eachd7 jlz0g4(:e y k;rpzc other with a certain force. If the charges on both objects are doubled with no change in sepaj(7zklzce d 4;0: rgpyration, the force between them

  Two charges are separated by a distance d and e6ln ruzslw*6:o 8ir1nxert mutual attractive forces of F on each other. If the charges are separated by a di rn:or6wnu6illz1s *8 stance of d/3, what are the new mutual forces?

  Two charged objects a,w *)xr7 ozyaod* )zdmttract 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 d,ym *rz)a7wooz* ) dxcenters is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sep 8qo9(1g 3sckzeqo/d iarated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placegoqi/kzo dec 93s8q1 (d next to the first electron?

  An electron and a proton are separated by zfz er76(oddpx xnx6t6 -n*;ma distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electror 7;(* dtx6de-xoz6z nx 6mpnfn is placed next to the proton?

  An electron and a proton are separated by a di hm78vr7nve7 x1ipw(m stance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m close1e7 77npxm vh (wmvri8r to the proton?

  A point charge of +Q is placed r+we8:vf2ib t 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 electrosta82r: ef wvbti+tic 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 trianglelr t)zjrktx 5 st33b8v11ys(h. 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 magn3zr sh8b(r5tv sx)13 tk1tljy itude 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 bnh)bpho 0b8w89) t vdis not a vector?

  At twice the distance from a point charge, the strength of th-i*pbad(o4 kmxb o+0ie electric field

  Is it possible to have a zero electric field value between a negativefna8l-:p)k ls and positive charge along the line joining the two charge) f:al8kpl n-ss?

  Is it possible to have a zero electric field value between two positive charg n2na2-0 n(lnqg yvli,es along the line joining the two charges?(ai n2-llnn2 0qg,y nv

  Electric field lines near psitive point chargeeqp ;z(g-4 ftqs

  The electric field shown s8 cs7yz8fvb3

  Can electric field linesp5ab6a h spo+d2rnkv1eq:r ;3 intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unifafgb,+ ,zgf o1orm electric field. Give a statement cz a1+g bf,fg,ooncerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diam:+kw )x pwktiif8;-sbd*g i1veters are each given the same charge, the electrpib 1k;: )v8fditw+-wg* i xskic field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wher2sm-y3 i-rk9p koz8 bye a uniform electric field is directed straight up- -sior2yy3k8pk b9zmward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium ne:li; 2qqt3 i1lnk b0 m0mrm3irar an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that iinqge tql9h0 y,(67 uxs grounded. As compared to the case without the hollou(y69eli t,q7hx 0nqgw sphere, the electric field at a point directly above the hollow sphere has

State three properti-o .v+,,c) clqcl klokes of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electrfr*1so1nsu) ex 5 fj,bm ++ynyon 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 mor vg-kmwvg b645e protons than electrons do6kbv45w vg g-mes this piece of plastic have?

  What is the charge on 1 kg gbmb jt,4w3 k;of protons?

  An atomic nucleus has 6d 6oxsxr xb((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 2.0 and -4*pm7cy+,h1 kvcfuy d2 .0 mC, respectively. Wha1vyy+h ,c2cpmuf * k7dt is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 Njwyu/oyk6 / uu bf(m(0. What is tumyy0 u//uw k6b (ojf(he magnitude of the second charge?

  Two 1.0-C charges have a force betweew9jve. 2jkjkr0i,l c*n them of 1.0 N. How far apart are they?

  The force between a ) qt,1v//wyl5,5 qd nt bjn.z b;jtjre$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initi 4xs d1gy 6elynpqr9, t(c6c-nally 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cyexdy6n6(p g t1 lnc s4,cq-r9m, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. d34a6 lqbaqt) 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. What are the magnitude and direction of the electrdalqq6a)3t4 b ostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2. ;v7 yk/o9ktymu zz.f 2 -x4oradag5r30 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 2rga -zmk .y49f7vut;d k3/zaooy 5r xthe magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges , 6xt3z9eprkws 2a*ciare 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 kctsza i,prx6 29*w3e x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is ply* o-r) )5./iaiaitt cbvt)tfaced 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 t t tr)b-5iic) i*yfova)a/t..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. tk1kn rb-isc63-2owb.zlmw 430 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net1w nbbil-oz3r-kc. 6 m2 ks4tw 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); xhl/c cu2j( kvc7dwg(lu17q4 Q3 = 5.0 nC is at (0, 0). What is t7k(vlhu/2cducjg4xlq7w (c 1he direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertil b+rn,qd; 6znces of an equilateral triangle which measures 30 cm on a side. What is qlbz,n6d+ ;r nthe magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, u c ge9(kfm7qb 8m*nx n/q2omuw.+pt)which 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 -Q such that the electrostatic force acting on it would be zero?7bk+q.x*emqf)t w 8 9u (cg/m 2nupomn

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 44)9v)b xkecfr( bpw 34ii-5t xx nd+kj.0 m. Where on the x-axis can a third charge be placed so the net force on it is zj ) -ex+xnrptb4c)kbi k3(4dw5fvx9i ero?

  Charge +2q is placed at the origin and cha6jblr 22nmf;h8ia c3p rge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force onl;22ijf6nc bmp 3h ra8 it is zero?

  A copper penny has a mass of 3.0 gei2 h( 3bu2nq/c ile;u. 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 v 5vnv8bfa;+n,ip+v jof a fixed proton some distance above it. How far above the electron is thep annv+v ,v8;5bivfj + proton?

  Two 0.20-g metal spheres are hung from a common point by n6(aoznu s7 j9+yug. quonconducting threads which are 36(9ugu7ajsnuq .o+yz 0 cm long. Both are given identical 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 gio awh8q0t6m8 h. /(iafd+rc of the electric field at a distance of 1.0 m from th+hfih.80a q darig8wm( o/ t6ce nucleus?

  What are the magnitude and direction of the electric field at a distaafq miud*;k7bgrb)6qt9 -d/ q nce of 1.50 m from/adru q67gb k;q - *9ti)dqfmb a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test cha3yi,u z6zbm)3d n u0fxrge. What is the magnitude of the electr umzu3)d0znf36yb ,ix ic field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directnhk2 * lfpv j0v5r8h4tion of the e8tvn *rh4p2f k5l 0hjvlectric field?

  A 5.0-C charge is 10 m f9,p bso*c v5rcrom a small test charge. What is the magnitude of the force c,s c9pvobr*5 experienced 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 separate5uea i w jbw8-*:83rnxt sgbd,d by a distance of 4.0 m. What is the electric field at a point:d5*w,u-b i3btrx 8esgnjw 8a midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick 64t/sweugt yjtfi 6ab3;h t.6and a -4.0 mC charge is placed at the 50 cm mark. What is the electr ye6a/g fhu;t.t 6wtib ts6j34ic field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick -j qc;54p 0dfhkslub* and a -4.0 mC charge is placed at the 50 cm marklhdu;s5 4k f-p0* cjqb. 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 xk4d(p7b.y1d3vaol g n = 0.20 m. What is the magnitude of the electric fikddl 31ony( abp7.g4veld at the point midway between them?

  Three 3.0 mC charges are at the three .yz8) 2;lr- ;tiil1lg6 (hcfdio qmoxcorners of a square of side 0.50 m. The last corner olli(-d.);2gx8qt6r c olzm ii y;1hfis occupied by a -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 the cornersex khqc6sg0) j+4ox8;ptf9 mv 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+jtfko6 gx8;sp4he )v9 qm0cx 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 iswhs-m,mj i r4j 3 8kcvq0xhu; t9m7zz: placed in a uniform electric field. What is the magnitude ; jc8m93u:j0vzi k-r4q7zst wm,h h mxof this electric field?

  A particle with a charge of 4.0 mC has a mas,n9) vry. ,i4klmbca:leem -zs 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 elect,omjtu -edt ,q8rdk234j)mz dric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be e4jouqdjd 2)t d rzk,-3,8mm tsuspended?

  A foam ball of mass 0.150 g hnmy3p-b ;+k ecarries a charge of -2.00 nC. The ball is placed insnm+ bey;3h -pkide a uniform 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 carries a charge of +2.0 mC. What is theu ;gkbq)i c.m) magnitude of the))q.m cuk;igb electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the e uera(uo1(l 1ilectric field 6.0 cm from the center of tloeu ( ui(a1r1he sphere?