State the law of conse8r- ldpe qta*8rvation of electric charge.

  Is it possible for two negat5e.dvcjhrhj(;/o w(1qroyqy i m*j4 ,ive charges to attract each other?

  Is it possible for a positive and a negative charge to attract each oth4f -5et,vc oq++t7a y6ffqzober?

  A glass rod is rubbed with a piece of silk. During tmn,fx wk/- k/the process the glass rod acquires a positive charge and the simn//tx ,kwfk -lk

  A proton carries a

  The model of the atom shows p23 .kd5tgmyk wod0:fa

  A neutral atom always zv8dm )f,xcr+h u5 f/bhas

  An atom has more electrons thanq7owszd 6x0 ynk5x- a5 protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are rexq6:tq .j :*xe,rfmlxferred to. jqxxl::rme,x6qf t* as

  Materials in which the electrons are bound very loosely to /, -0fn5 jjve-q q pk)*vymruox( zr6tthe nuclei and can move about ktzujnp* mv-q0 y)f /,v6-ro xejq(5rfreely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal ia7 y9f csn+7hbar. The end of tcfs7ny+h i a97he metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They a9*i71ibt9i8xvi k yware placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement i8a7*iiyik w9i1bx tv9s correct?

  How can a negatively charged rod charge an electroscope positivelympx b2kkcl;6 pj5 als+ )37r(cwdgfu9t2d.gz ?

  An originally neutral electroscope is briefly touched with a positive6i(a t4c; 1hg jrl :wdlpm0sa y8--fumly charged glastflhy -i1ga8d0sp m w;aul(j4rc:6-ms rod. The electroscope

  An originally neutral electroscope is ayq.irpujt 58 cze;5g(kp b(5grounded briefly while a positively charged glass rod is held near it. After the glass rod qytjb ir5(kc;eup(5z.pa5 g8 is removed, the electroscope

  A positive object touches a neutral ei0lh u uxzq(+l.k22o flectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Whatq 2lu ozh+ .0(lxfuki2 happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neu3h9p aq(0ri cuo )3a1vvpq6qv d s 4wj38ay(hytral metallic b3a8j rwys)33 q4 ua1v0cppihy9q6 (q(d voa hvall 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 charge on each ball?

  Charge is

  What are the units of the Coulom:az p9bn8u,ep b constant $k$, which appears in Coulomb's law?

  Two charged objects are o+fk7m1pd ur v40q k)gseparated by a distance d. The first charge is larger in magu7+vmpq dgk1 o)f 04krnitude than the second charge.

  Sphere A carries a net charge and sphere B is neu ;r6ponbay2 q 6(pw/wjtral. They are placed near each other on an insulated table. Which statement best descyb/ q6n ; joa62(wpprwribes the electrostatic force between them?

  Two charged objects attract each other with nr5sr os.f/3mary3h34 f,j vd a certain force. If the charges on both objects are doubled with no change in separation, the force befs33myo/s. 5r v,n f43rdhaj rtween them

  Two charges are separated by a distance d and exert mutual attt+0jt2l 0k +xg26ht /l/+xsbxh1 q3 ifekbqj jractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forcess3q+jl 1+g0ktqkh + x t2b2/xle0x/bjihfjt6 ?

  Two charged objects attract each other with a force F. What happens t8je0iwcd b :: 1ov3ledo the forcelvi:b:1cwod38 edj 0e 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 value? The force is now equal to

  An electron and a proton are silr o/a2ad ygt0hyg ./+-+enleparated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electr/tne a a2gl gy+hi l.0oryd+/-on is placed next to the first electron?

  An electron and a prot4 ni6f l(zz-hb w71kmlon are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first elecnbzlf4i7 l(m -6 zw1khtron if a second electron is placed next to the proton?

  An electron and a proton arebg80zb6 -,spoc rjrzn1)4kar separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved jk 06p- 1,z8arncb sgrrb)zo40.50 m closer to the proton?

  A point charge of +Q is placed 5dbp2 j5j kcfoc();f+i7ihqp 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 ele(piqp h)cd5ibff72 5 jco;kj+ ctrostatic 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 i/4g s vba/j-0fti2x tds placed 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. Whatibx0jts2d/4/fgv a -t 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 :tqawf0 o0weyu9r 7sv1s/a,i vector?

  At twice the distance from a point charge, the s/oq( pz *r/(hoa gxsf0(e+lvctrength of the electric field

  Is it possible to have a zero electric field value between a negac.;sx7a94p mosnmig21p jmg8 tive and positive charge along the line joining the two smx.1asn ic;g92pmp 8j7g m o4charges?

  Is it possible to have a zerbojdy*vsio*35/ rhf ,o electric field value between two positive charges along the line rs *dvfj,5i *oby3/oh joining the two charges?

  Electric field lines ne(b7a cv1 k/t,8s ec:ch6eljhpar psitive point charges

  The electric field shownweje/o:4 xn,u

  Can electric field lines intersect in free spacnrvd s,61i* w:gduhz7 e?

  A solid block of metal in electrostatic equilibrium is pla z/el r),1w, kzceioqy9led1m;9 *dd uced in a uniform electric field. Give a statemel1e,1d/q*dd l wez umo;k 9rz,cy9 )eint concerning the electric field in the block's interior.

  If a solid metal sphere a qbdks)f a6yo80o)w,9t evf n(nd a hollow metal sphere of equal diameters are each given 6n,d f f )w(ot0syak9 eq8vbo)the same charge, 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 utig:;f9r w6 ; mxmegv1niform electric field is directed straight uix:gr;mw e1gtmv 6 f9;pward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostat/ -8a7siyjvd 3syhb a:ic equilibrium near an electric charge

  A positive point charge is envc4h: gqr0eo;closed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abogqcr;h4o v0e:ve the hollow sphere has

State three properties of conductors in static equilibchzb*n(h h*dy:i l(6f+ql 9g irium.

State Gauss's law.

  The charge carried by one elec;yu( bz4g:yph - j 8j+znt*jl6q5 unpotron 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 ch5 mnz:48q nw6y6olyy sarge of +2.00 mC. How many more protons than electrons does t qosymzn4 l6:8wn6 yy5his piece of plastic have?

  What is the charge osl jyym(qe*h :brbo6,1vkp1 5 n 1 kg of protons?

  An atomic nucleus has a c9yoo p po57r63vfp +roharge 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 c9 5/.3 wckh*dc zaysxcm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between the3c/k9d czx *5h.yas cwm?

  A 1.0-C charge is 15 m from a second 7axq8--c ,i ug,kf xthcharge, and the force between them is 1.0 N. What is the magnitude of the s x8 i,7g -cqut-faxhk,econd charge?

  Two 1.0-C charges have a forcgbrn(9.c7nq a e between them of 1.0 N. How far apart are they?

  The force between a 8,md:pjdg6 qn9bo2of/ sgm+ a$30 \; mC$ 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 1sfs gb-(;/: gxvtsqp8.0-N force. If they are mov:qsf pgs8xv-gbt;s(/ ed to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on 2 pd;qi.tqf j8the 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 dirq2 .tqp f8j;idection of the electrostatic force which acts on the charge at the origin?

  Three point charges are plcm h 3*mu1b6ddrt4h/f aced on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 506mdfth urm* 1d4b3 c/h cm, and +4.0 mC 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 located at the following positions: Q1 = 2.0+ so3 buqo5fxj* b*iex7yap (40 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is b4y3i(7*5o xeu*qbpox safj+ the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, an:.yi3nvc.ty* sn f5whb7 wp(qd a second point charge of -Q is 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 thh5yb.wvpiq fn* nwc3:7.y(s te 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 gw +iz.,p g q0yt4dpobbv)4 i.is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitu.wbqp4 ibd yzv4ti p.,0 go+)gde of the net 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 .va, jq.pwh 2,qa:y blm); Q3 = 5.0 nC is at (0, 0). Whaa,yvhw,l : .qqb. a2pjt is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of (,.h4jzhyfe b an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charge,z.4hfeh j (ybs?

  Consider point charges of +Q and +4Q, which are separatedhvj x; np(:pgpif7n15c ;7zp m 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 elect 1: p7i(vmfpj 5 ;znph;7xgpcnrostatic 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. l4xaao0 0i*jcWhere on the x-axis cax*0 aij 4l0ocan a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. ,2j r1ft10(;z* y )aheqosey /dgo qlv Where can a third positive charge +q be pla e12zayf;qeo vqysj0/gh(o *tr1 ,l d)ced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A)iw+mbwia /+ u 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 b-zqa+ 1l 2saja s( io9wd-xt)fy the attraction of a fixed proton some distance above it. How w1qa sl i9 s2a+t-of) ajd-z(xfar above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by no+d7 so-d9z pwinconducting threads which are 9 diw-do s7z+p30 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(au 03xxu.3 vh5e8b)nzsmp fx is the magnitude of the electric field at a distance of 1.0 m froza 5(uux03xhxpm vf38ens. b)m the nucleus?

  What are the magnitude and direction of the electrwfv4 p81*aw cuic field at a distance of 1.50 m from a 50.0-fuc1 wv84wa*pnC charge?

  A 5.0-C charge is 10 m from a small test chargem( qobk- xdq wcv74h/8. What is the magnitude of the electric field at the location of the td (kq-hcmqx/ o74bw 8vest charge?

  A 5.0-C charge is 10 m from a small test chargf* p9dhxii:;att 5i5ae. What is the direction of the electric fi 5*ahdfit;xt ip5i9a :eld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnituxgsyjy8f)8d v ih pjx;( 2h m64buw5q.de of the force experienced by hy4uv jxsgjb.xh2qf8(;8w5my6p)dia 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value okr+clc5naw *kt*i ,0 hf 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point+ trc w*0n5ikh kca,*l midway between the two charges?

  A 5.0-mC charge is placezawhctm(,k b+:vmgoxvg *p/) xptio)5r0( o2d at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 irpbom 5wm(t) vo/ gg0h *( +ozvk):x2,tacxpcm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chargx3( hhpi0x(;x1lwkoi w :s lc*e is placed at the 50 cm mark. At what point on a line joining the tl 3ix:*(ww0iphh1 ;lsx(x ckowo charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x aog( pkqtko 6*5.*7 3nv3jxikk re- jx= 0.20 m. What is the magnitude of the electric field * j-xxk(3req*nk. k oi av53 7gjopk6tat the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 o5ho dr 5r;xf46q;bt tm. The last corner is occupied by a -3qo h4o65; rd;rbtx5t f.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargos yt8 gz1r.y6peq9 /tt*oh5yes are placed 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 mazy 5soy9 toqe t81p. *ryg/6thgnitude 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 ujx-p zku;zb8w;umt 14 niform electric field. What is the magnitude of thiszbp8 uxj ;kz;t1-4uwm electric field?

  A particle with a charge of 4.0ym:fl(bd c 4hohbj0); vq26q-wmkji7 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 electric field ofxqjx2w a- ndq13ttz5bafk1(ui-td 3- 6000 N/C pointing downward. What charge must be pzuq 3df 5q- x-dbta3-t12 xna ki(1wtjlaced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed -yqg 4wp il-e*inside a uniform electric field, and is 4-wg*y pie- lqsuspended 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 i8g9ad 4o4iupes7s : ) k4fbcvjs the magnitude of the electric field 5.0 cm from the vp8)4g4e9 k:jcsf7 b 4oidaussphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elect/ hsnsq-m h,2w f6h*dkric fieldhhh2k n d/s,m-6wsfq* 6.0 cm from the center of the sphere?