State the law of conservation of electri5h *y4wwrb -:tahf h0xc charge.

  Is it possible for two negativsp./ky ec tsi ,4/d4xwe charges to attract each other?

  Is it possible for a positive and a negati7,yht;x a mbt5z raq744wktu. ve charge to attract each other?

  A glass rod is rubbed with a 3 zk1ctplj) -fey 4id-cue8w3piece of silk. During the process the glass rod acquires a positive p d 3--4i1fcky )u8teelcjw z3charge and the silk

  A proton carries a

  The model of the atom shows n; 62pos v3axda

  A neutral atom always.an gzs )x,9gk has

  An atom has more electrons than pnl;g3vj9j 8 /o) efacvrotons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei 6:gtf w op4+xvare referred to tv6pfxow4+: g as

  Materials in which the electrons are bound very loosely to the nuclei and can-k *mi7zivg61w g(ij u move about i 7ggz( 6vumjiik1*w- freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metalf. 1 7sp 6+ji3j1sk; cili; gmb hv*s6cm2sqvd bar. The end of the metal bar farthest from the vlc7p 2+3q6sj .ik1;cj6h bi1sfsd;mmvi sg*charged rod will be charged

  Sphere A carries a net positive ch/vzo eo9b+p5q. z/ymqarge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched 5/ bo .9zz /m+qpveoqywith a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope po)l0s n adu9ypu u;s6:lsitively?

  An originally neutral elect1 z:b(dt*0onbp d5t-a;f d ookroscope is briefly touched with a positively charged glass rod. The electroscoa( n50dtt; *b1d:zbd- okfooppe

  An originally neutral electroscope is grounded briefljn d4mpw c+i7-y while a positively charged glass rod is held near it. After the glass rod is removed, the elecmc47+dpjw i-n troscope

  A positive object touches a neutral electroscope, and the leaves d8yz55c3ia f6: uggnxseparate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the ldn:g58i uf36gxyazc 5eaves?

  A large negatively charged object is placed on an insulated table. A neutral x5mi4c(5af1r6x v huzmetallic 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 final char ifhm6 uz5xa r(5cxv14ge on each ball?

  Charge is

  What are the units of the Coul5pfdrgi (/ q+romb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distdvw s,5 )b8cvhance d. The first charge is larger in magnitude than theh d,cwv)8vsb5 second charge.

  Sphere A carries a net charge and sphere B is neutral. They are ptt2 l4.*bgt yllaced near each other on an insulated table. Which statement best descrtytt.bl2 4l*g ibes the electrostatic force between them?

  Two charged objects attract each other with a certain fr t.(-*fbnkgwo.j cm8 y)6jqcorce. If the charges on both objects are doubled with no change in separation, the force between. *8fb kqg)y6jwno.(c mcrjt - them

  Two charges are separated by 5+choroz-wk(c ,h2/m:+bjf 6p wcqnu a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces?ww p (5,fqkb++ujn6c/o hczro:h- 2c m

  Two charged objects attract each other with a force F. What happeo (*3ex6o :hb)* tzvnl7epzk wns 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 origino3p) o7telxwn*b k*z( eh v6z:al value? The force is now equal to

  An electron and a proton are separate p /.9zrv b8ixm17sxhjd by a distance of 1.0 m. What happens to the magnitudei.bx19 pjvsx7r8/zhm 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 -7 b3yulobr ,cdistance of 1.0 m. What happens to the blrcu,b7 oy-3magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. i by yh *)5jt15lvh r3l/6s+ tbzc1lsrWhat happens to the siz5tc3bh5yly slrri*)hl/ 161 +vz stjb e of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. Whbi,r.pbpw5( krg d1 m+e4yfu 1en 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 porbu5e g+,4mk(f pri.p 1bdy1wsitive 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 plqol(h.1y6+, qwbsrf7s er9pnv5hu a ;aced at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic for6 h7q5nlv ;1fo,r y+sp9 whq.(uera bsce 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 nqc da 7*j e:r.wj4p83y)dxnh uot a vector?

  At twice the distance from a point charge, the strength of the ele *y4lebga6dw:q7h - 7zda;tzr ctric field

  Is it possible to have a zero electric field value between a negativem vv ax,-hbw*7hhh 64j+l5j sv+zc42am:ymjx and positive charge along the line joining th +j:wvh+x4bvm5-4 am6hza2j s*hxjm7, l cvyhe two charges?

  Is it possible to have a zero electric field value between two positiveuj/u oakd t k9(y( v;(q5pkbz- charges along t;u / (ot((akzp 9ukbykq 5vd-jhe line joining the two charges?

  Electric field lines near psitf n9 bru4;b1jdn zw;:dive point charges

  The electric field shr. cvfq8yki +8own

  Can electric field lines i:z- 1wwjl+vht z7bm9 ,d hv)msntersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in /gou 7.+kz)6rp1xwa3dbgdvc a uniform electric field. Give a statement concerning t/g)z1k+6d7b 3vur.ao gpwcx dhe electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameteblbh9 j* .x bv5n)ghf-rs are each given the same chavfb*g9)hl h bnb.j5-x rge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform eqyza0te alb a+.7+7xwlectric field is directed straight upward. What can be said concerning t0+q 7atya.wx7+ lzebahe charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chaa n/lei30; mwfrge

  A positive point charge q 4fa+jm mdxg/ob/j-lw83cs4j b cv50 is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electricfjsw4 b max j3-lm/qc5dcj4g8+b/ov0 field at a point directly above the hollow sphere has

State three properties of conductors in static equil* h 2eyd epx91b93mt3dkpjau.ibrium.

State Gauss's law.

  The charge carried by one electj3rk s2ee3;wkron 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 ch6*itw 8du;ect- .6x7sl rk kjharge of +2.00 mC. How many more protons than electrons does thi*.sk768; 6hcd ru e lttj-wkxis piece of plastic have?

  What is the charge on 1 kg of protons 5*-qfygq4cus px)z.;-;4gczp qdal d?

  An atomic nucleus has a cha p1ryecj) *h5xlma,9srge 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 nd3k9gs19m hk:-w;/cx mxw pl of 2.0 and -4.0 mC, respectively. What is the magnitu g m3m1x-s ldnx/9 :ckwkp;h9wde of the electric force between them?

  A 1.0-C charge is 15 m fro4sfwc: inxfvbp ; -lklk(+o/(m a second charge, and the force between them is 1.0 N. What is the magnitude of the second chanoxsil (;(/bf-:4lvfk kp w +crge?

  Two 1.0-C charges have a force between them ot fd.)dom2h 6frfg7su,-0 ee 3sh 5kvxf 1.0 N. How far apart are they?

  The force between a + v o7gh8fxc4go)*iox $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expeow ec ;ehm 1bybp.6;yt6.bz3prience a 1.0-N force. If they are moved to a new separation of 8.0 cm,t.y;z1 eyb6w.c3mbp; o h p6eb what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the w, i*y;sbr2oej2mzs /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. What are the magnitude and direction of the electrostam,ys/2 br*wj ; oi2zestic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC 2; 2i z,kwusuk68d* vixvmi0 sis 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 for22mx usi86 s0dzvi; *w,v kkiuce which acts on the charge at the origin?

  Three point charges are located at the fo uxhqkyql:t3k2*r8 0w llowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; uywk0l8 q kh 2x:*trq3Q3 = -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 pl5 2tsnmqbd*i( 1u:qu taced at the center of a square, and a second point charge of -Q isin t: qmds2 b(5tuu1q* placed at the upper-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 = -1.0 nC is at (0, 0.10ci z uc3(ncp, e.sj dl1em,41z m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 , l.1(jc3ds1zue cnpim c4,z enC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 ne/01a m7i)cqzm :7qjzug wgr+ C is at (g:q7iqm)j+rc /wagz7eu m 1z0 0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC . kj db:skb m7vqd886q uj6td2are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic forqqsj6 u 8d 7dv8 t6b.dj2:mkbkce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3:3 v -yqvxnrdd8pqo) hr6,l3l;o4u tj.0 m. At what point, on a line between the two charges, would it be possible to place6 u :qrvr3d,ql 8;hopo j-ytdlx4vn3) 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 v;d 5pta7b(zg 4ibog w(gs- f/is at x = 4.0 m. Where on the x-axis can a third charge be s5vtpb/gz ;gf (wdib -g7( o4aplaced so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at rf1m gix,fatu e-jo/6jqq7/ 6 x = 2a. Where can a third positive charge +mf- qq6 gju7txi /f6e,/ar1oj q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total.u-f.hn k1st j 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 o)( ctg jedik0huk .3w0f a fixed proton somck(030etk ).g ujwhdi e distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a taoe(n7+l b4c4ydu ,ecommon point by nonconducting threads whae(4ucb, to ye+ nd4l7ich are 30 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 cha1i b,nko3+ vhzrge of +40e. What is the magnitude of the electric field at a dih kz,+v3nbo i1stance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at u s.q:ax-ks f/qr6e,ha distance of 1.50 m from a 50.0-n.q6:far kqx / ses,-uhC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitud v-/h 1qsjesecj2kjx5,+(qo se of the electricsk+eo/ j1qs(jq,5- j 2s hvecx field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of thez;s:5 d gzpi2a electric : azsdzi;2p g5field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudeg3ed +/g- gfq)semd.l of the force experienced by a 1.0 nC charge placed at the locaqf.e gd s)e+3-/dmggltion of the test charge?

  Two point charges each have a value of 3.0 C andp;ph oqus 8fh1o 9qlg:nx42 c7 are separated by a distance of 4.0 m. Wha49upo c phohsx817;2lq nqfg :t is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed ato17hhq9zqra 4 pxc nkn h(x2*4 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 fie4n2xc(hax9rh h pkqoqzn741 *ld at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0def)t37 q03t xmv/c3jwptoa. mC charge is placed at the 50 q/o3 3p3dme.) tvax wtf07tjccm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +r2i2nv;;-nf(wu mi lb3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electri( n ;2fmil2;wu bv-nirc field at the point midway between them?

  Three 3.0 mC charges are at the three corners of jo).glg /x w d:wmf(tll560hpa square of side 0.50 m. The last corner isw )fpg ljmx0/t.oldwh 6l5( :g 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 placedvoa8 ;aq zxo,d,d1ex / 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 magniz,oa8d1xov dea,/ x q;tude 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 pqxuez 1( a/s6hlaced in a uniform electric field. What is the magnitude of this electric e (zq/a1uxh6s field?

  A particle with a charge of 4.0 mC has3:wd* k0bsblo0 3rny b 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 0hpcg mxh o ,mc8kpfn/q:-j. 3y6 hko*N/C pointing downward. What charge must be placed on the ball foroh8 nc3 h/-:p qock*xh pg k60.yjm,fm it to be suspended?

  A foam ball of mass 0.150 g carrik lcalr (q wmq21b;b1*es a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force o(cal; blb qwr 12mq*k1f 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. Why- cb lgk .gdi62fn 7)u, w+q6ym*pqckat is the magnitude of the electric field 5.0 cm from the sphere'7)kquy*2bw . ,+6kyq p6 cd-lcmgingf s surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whatii)sqq+z3wi;c e-su5.zl1k b is the electri sq3) szk 5ubqe-;wilii +1.zcc field 6.0 cm from the center of the sphere?