State the law of conservation or fzh9j(lz9 igw *ma*,(tl*j of electric charge.

  Is it possible for two negative charges to attract r pht5)wyo.ur*. l9cheach other?

  Is it possible for a positive and a negative charge to attra 9,u3krgefjf :3jw *gyct each other?

  A glass rod is rubbed wl 0b8qk gl*a,yc g-o-- 7oayvsith a piece of silk. During the process the glass rod acquires 8-ogko,0y*y7aga lsq cb-v -l a positive charge and the silk

  A proton carries a

  The model of the ato 3q3ncvr-0q nsm shows a

  A neutral atom alwaysy3dm 13pmnp n1lg2htk9 rd(+r has

  An atom has more electr4vb/4 8c vdbehh(gea ;ons than protons. The atom is

  Materials in which the electrons are bound very dk y11-b4iec qtightly to the nuclei are referredyd4k -b i1e1qc to as

  Materials in which the electrons are bound ve1 x- vzk4 j8 dr6vxl0pwu2i cswd;/z1vry loosely to the nuclei and can move about freely within the material are refelvx4 k zpdx-1wwu zijc ;s2rv6vd10/8rred to as

  A negatively charged rod is br,; u lnxq6/a+r/zcx qxvn7 )hqought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod /xn+q qq6;h 7rvc)xz, nla/x uwill be charged

  Sphere A carries a net positive charge, and sphere B is n90pttkqm ; b9tev* q5reutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wir;ttvkme*q r9tb 5q90p e that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivea5s.x a n-qczzk8rz3,n :qh;4vs d-afly?

  An originally neutral electroscope is briefly touched with a positifay;/1 rpgjg6bd -+w n6 gnzb5 qgk*6lvely charged glass rod. The elywpgq1bz rngj5 k6+ggd a6/bn- ;lf*6ectroscope

  An originally neutral electroscope is grou0ku /cnq 5+irvnded briefly while a positively charged glass rod is held near it. After the glass rod is removed, 5v0ucir+k n/q the electroscope

  A positive object touches a neutra; w6piq4ijd ; mw:m,nrl electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Wi 6 mwpi;m4; dr,:wjnqhat happens to the leaves?

  A large negatively charged object is placed on aa+ * ,0brp2 ,cjj,xvzfbsubr 6haxf-3n 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. What is the fx hx3a v, f,-ua0+jbbs* jc2r pzb,f6rinal charge on each ball?

  Charge is

  What are the units of the Comt,ur-.w c h/mulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firs8 uh, xi/r;6azb upw)ht charge is larger in magnitude than the second upa8 rb6ui)h;/,hzx wcharge.

  Sphere A carries a net charge and sphere B is neutral. They are p(e unn( xc5vw4y 3w4folaced near each other on an insulated table. Wh 4u5 (cy fwn34no(vwexich statement best describes the electrostatic force between them?

  Two charged objects attract each other with a ce, zn(fg+uoaz32esqgk h4qs ,y( 1,c y jiw4r*urtain force. If the charges on both objects are doubled withsswzk,3*a1u 4y(fyh,jruozc(q4 gg 2i ,+n eq no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive f/dlto) r8z6jhrlr7 1oorces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual foh 16rtll jzd87/oor)rrces?

  Two charged objects attract po78-ajy. (6kogh8sw zl/ c veeach other with a force F. What happens to the force between them if one charge is doublk6 -8hg(olvcz7s/ epoa8w j.yed, 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 proux:/k7ru3h nlton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton i:uu 7nxk/l rh3f a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. wc9hi qo u32(c-,2twenc ru8g What happens to the magnitude of the force on the first electron if a second electron is placed next to the pu8cu9wcei3q t2g(,2 hw -cornroton?

  An electron and a proton are separated by a distance of 1.0 m. What happens s ;: sian.x5fqto the size of the force on the proton if the electron is mi.n:sa sq5x ;foved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a say7 ip, b2lov;cyv j m00-gu-oquare. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrlovumy0ob,-i07;2 gcapv y- jostatic 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 thsuph1w h :6aq0e 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 o: wq6psh1 0haun 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 vectorx(z0oaq/;zupms 8 0pa?

  At twice the distance from a point charge, the strength of t wxax.in 42i /-rhzdo+he electric field

  Is it possible to have a zero electric *etx.8rzazq(,- qcsb-niyy4 field value between a negative and positive z(8 xrqt yn4.--*ia ,szbqyeccharge along the line joining the two charges?

  Is it possible to have a zero electric field value between two posit(n wbfi:*:b(uf0 opptive charges along thep: tfu:oi(b fnp*b(w0 line joining the two charges?

  Electric field lines near psitive point charge yhca t3z-p)e rst4d-0s

  The electric field shown f c1v;k*lm5ns

  Can electric field lines intersy ex--oh4 mlh.ect in free space?

  A solid block of metal in electrostatioi p5:i19r.:pm ef ukoc equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in p o:or19iif p.:u 5kemthe block's interior.

  If a solid metal sphere and a hollow metal sphere of equal u.w6(xr c/ (+xmf)n 8 fvhnvsfdiameters are each given the same charge, the electric field (E) midwa6us +vc.hwmf 8/rfn n(fx)vx( y between the center and the surface is

  A cubic block of alumin7vu sf:(:p un. jjq+bqyosg29um rests on a wooden table in a region where a uniform electric field is directed stra.pf s(uj:7yjn:q92s+vq gu b oight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic euyr)n+ hvhj)w2/)x se oh,ci2 quilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere6 /ioqu3o 7ss 6sdmstih 7a:)s that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow3s6i7oothq7 /umiass 6:s d)s sphere has

State three properties one(zkhm k* .ve/y+y 5xwq+nm)f conductors in static equilibrium.

State Gauss's law.

  The charge carried by onej )2yzs,l /tqr 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 )q-4jiimnhw( a net charge of +2.00 mC. How many more protons than electron4hwqmi-j i)( ns does this piece of plastic have?

  What is the charge on 1 kg of 9hibgz+ f ;13chu z j tp9z8niy5,+qwiprotons?

  An atomic nucleus hasaca0*nj/ ; iyq1vnnn6 d m3:k4 s/-yuiysk r4p 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 valu, hip5o 8qskqr w-p gky/2l*7des of 2.0 and -4.0 mC, respectively. What is the magnitude of the e7 sh /,kqr 2y5*pdkopw-g8liqlectric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwewpm nv1x8rl8:x -sov4 en them is 1.0 N. What is the magnitude o1sl :n8 rmvp xxv4w8-of the second charge?

  Two 1.0-C charges have a forc3r36vkwlt .t .glrmb;e between them of 1.0 N. How far apart are they?

  The force between a xmhon4,l6+v s)n eh3f $30 \; mC$ 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. If tj)0.wmv s83wpar*ygchey are moved t *8p. 3rj0cav) wgmwsyo a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charge /6 , buplfoqdf sras w2r;w6ya3wh941s of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second t y ar3;2fdols6wsw,w ru94 b/ h6pq1fao the right at x = 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 pla4 vqbnn(x *8dbced on the x-axis. A charge 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 bndq8b( * nx4vforce which acts on the charge at the origin?

  Three point charges afpee54y 3 uwx( s;kq/gre located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = ;exgu/pwfeqs (534ky 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 placed at the center of qd tlvxdg9d *l4s++pf( 1ooz )a square, and a second point charge of -Q is placed at the uppervsd 9xd(t op1oq z +)4*lldgf+-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 (0.300: ogxiuofg 9, )u. 43xal4qgc t+edzt m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitud3.g90lofxo,u)4z:t e+xta dg4u igcq e of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.3 / ;lh./w(9hz ey q(gyzzjlmy00 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on thq;hy(g9.wl yzezy j( l/ m/0hze 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral : qcvy, c; lxd7v3awt7triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which act q;3cvayx ldc77,t:wvs on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. An ;+ wxosyk,/ut 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 uy;+ow/ nxk,sit would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. :*dycz:t ;oh1e j1 eirWhere on the x-axis can a third charge be placed so the net forc ej1rzye :;h*i:d tc1oe on it is zero?

  Charge +2q is placed at the origin and charge -q is placed att 6,;syrqak+ hha s)b8 x = 2a. Where can a third positive charge +q be placed so that the force on it 6+t a) h ;sarqk,syhb8is zero?

  A copper penny has a mass of 3.0 g. A7cr:; /la axcz 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 attractioed-gfb/azg u*3+c nan d* y*-bn of a fixed proton some distance above it. Hoy**e*na dz-a/fgbc3+n -dg b uw far above the electron is the proton?

  Two 0.20-g metal spheresluwo ) aeux ,08 .9bn7hvkg2o,y.feni are 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 between the threa2o)x9h gywb. 7,a n80 ,lnve.ieufuk ods 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 elx9xs j6eo9*v zq4r 0alectric field at a distance of 1.0 m from the nucleqa40r6o lx ze*v9xj9sus?

  What are the magnitude and direction of the electric field at a distance of 1.50y/ pdf v/k0-zq m from fz0v/kd-y q/pa 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chvu b2-k6y 3yhi:3fzhvarge. What is the magnitude of the electric field at the location of the test zu: 3yyfkhi6 hbv2-v 3charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dcavru: t 7:zf,irection of the electric fielrcut z::7,vfad?

  A 5.0-C charge is 10 m from ik51 ydy:fjbv zx:qp:qnbh 808+ 48qk6gyzp pa small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the locatiognybyi8k:zbq5f:4vq:8 pzjd1x8 +yp6 kq hp0 n of the test charge?

  Two point charges each have a value of 3.0 C and-cal ;a okgi33 are separated by a distance of 4.0 m. What is the electric field at a ao3alc3; k -gipoint midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chargefc:e6i l -jorphayw l)7r9d,+:8a r py is placed at the 50 -96pr 7j dofcir,a :e rpy:8ll)wya+h cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm markplsmdk5 sl ) e0ppxwn0c/muq ra+24xh-+g)7n of a meter stick and a -4.0 mC charge is placed at trnw-sg2u4d)pex0h np5l+0s l)/mx7k qma c +p he 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. Wh 9q0 gl1t9 a8)ejxkr a86vilson2c0waat is the magnitude of the electric field at t9ta1a x)09aiv jleol0c 6w8k82 gnrqs he point midway between them?

  Three 3.0 mC charges are at the thukt-k8jkh (+g mdj294a7e leiree 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 th mhi( kj9je8l4- +tedg2kuka7e center of the square.

  Consider a square which is 1.p7t;ntj nlm(0 xv+ge*5 ln(vi 4n b0we0 m on a side. Charges are placed at the corners of thejnw+( tvm0 ;nbg7n 5ie4e *vxt(0lnlp 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 center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unif ;3ljsh,usnmo y (8nw,orm electric field. What is the ma;s(lwhy8 s3j,nun mo ,gnitude of this electric field?

  A particle with a charge of 4.0 map8 yjeip p0,;fc sj79fxy2j7C 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 electric field of 6000 ( v 8rucy-8lgrfw;q8*vmw e6r N/C pointing *6ruve 8;(-rc8 grwwfvql8m y downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a1et37cz ejh+wtp8*:ohz 6rez charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Whaewzh ezez6rj87h 3tpo +c*:t1t 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 the mag0hsu.u i,(dilnitude of the electric field 5.0 cm f. ul0sdi,i(h urom the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. .oz5 p,i ya;dt What is the electric field 6.0 cm from the cente pt z,5yo;.diar of the sphere?