State the law of conservation of electricl9hu4; lo z+e0v- ,tkhdi :qw-s5onlf charge.

  Is it possible for two negative charges to atf 8gzq3z-i-vy9o p,id,4 majdtract each other?

  Is it possible for a positive and a negative charge rcnu oqj,z; ,q1ily o*evo+zsr;5 3i( to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass roxf ,l. c:fw/k.z- hxnmd acquires a pw -n.fczlx:xk,/m h.fositive charge and the silk

  A proton carries a

  The model of the atom shows amq2w 0;5q*ff o60.4gacbs+noc kgi li

  A neutral atom alwayoqhlqwhh25) h235 (dyoar1on s has

  An atom has more electrons th -i 8(ualxa;kv q07j;u xfibh*1tu0lpan protons. The atom is

  Materials in which the electrons are bound very tightly to the nucegid5i 4 j0m,5fo0cp llei are referreg4l,me0cif5 0po5ijdd to as

  Materials in which the electrons are bound very loosely to s7a q-4nnko8cthe nuclei and can move abousk -7qn o48anct freely within the material are referred to as

  A negatively charged rod is brought near one end of9kj foz za8e9dt-,*x v an uncharged metal bar. The end of the metal bar farthest from the charged ro9t, *vkajzfzodx9e -8d will be charged

  Sphere A carries a net positive .e sqm* z6yk3fxrj obso9 7a6;charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a 6a bzr9foox q3e6m *ky.j7s s;wire that is grounded. Which statement is correct?

  How can a negatively charged rod ;w4qe ,rgr lej ajj;4(charge an electroscope positively?

  An originally neutral electroscope isxnt(c ,5jdm; y briefly touched with a positively charged glass rod. The electroscopenj5t,yxd;m( c

  An originally neutral electroscope is grounded brieflyj*rco8a (d)hg qol,q. while a positively charged glass rod is held near it. After the glass r,odgr.*j)q l(c8 haqood is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. utvp(haxza+ q0ik h,(2p5a (x Then a negative object is brought near the electroscope, but does not touch it. What happens to the lea 0k2(,av q (a5zx+p(uhit xphaves?

  A large negatively charged object 5 ,1 fvnxy h:dl:lpguj7f5- xqis 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 firs5gvfx: f57d -pq:j uhl1lyxn,t 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 Coulomb constfnwha 62yh7x8ant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firs.zj) bs,w2j1p3 awn+zl1q2c1hm t qt89 vq urst charge is larger in magnitud1zw u.9j8h 32ct)+ 1s2qvspr zbnwtm, 1laqjqe than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are pla wvn o9d/;c75hvq-ywumlf:;h ced near each other on an insudqm-h 97hf5:l n;;cvuow/yvwlated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain fov; l/amu ,ivt.rce. If the charges on both objects are doubled with no change in sep.u/mli v,t; avaration, the force between them

  Two charges are separated by a distance d and exe4c g4vxei7lqp.;d ew+rt mutual attractive forces of F on4cvlqp ; edixg+ .ew74 each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attc;dysd; zxi-3ract 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 centers is reduced to one-fou;xs-;3zidcy d rth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happwc j 7/j90qif z1zp5xzjis6do( qn9(nens to the magnitude of the force on the proton if a second electron is placed next to the first elq/7djon9xj1i(9czpq0 zsz( j 5 6iwnfectron?

  An electron and a proton are separated by a distance of 1.0 m. What haa)vn7ykv j;b*py 2 7pnppens to the 7jpyn)bv*y72n a vpk;magnitude 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 op/crw.-b wc/ ,/ek/ar1ym vv of 1.0 m. What happens to the size of the force on the proton ifcm ko/vrc./ebry ,ap/w1-w /v the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second point,*;dhf rk / 7yrve: :u7kphgrhy1rzx : charge of -Q is placed at one of the square's corners, it is observed that an electroh:/yrr, 7vkr:h dxkh;y gezr7u :1f*p static 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 *pg)dng,dw-r 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. Whad g-*ndrwp) g,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 fw b,i lvtrm r* d56n0q; e01et*ke yfc(x8iv;is not a vector?

  At twice the distance frokoys8gm 1 6s-xw +(wzsm a point charge, the strength of the electric field

  Is it possible to have a zero electric57k(txg+ (ldz w1p 8yccpsbnux67wv j8xu f95 field value between a negative and positive charge ax6 cbjyzwvsnu+w1785kdp58( x9gxc7( fl utp long the line joining the two charges?

  Is it possible to have a zero electric field value between two positive:0whlwkxu,suq . 9nkl+nc 0w-qb on59 charges along toqw ckl w-9bh0qn,0wsn: 5.u9 ulnkx+he line joining the two charges?

  Electric field lines near psitive po:kqz3q h cqyx*l,f b/u3op;3a.vm ej2int charges

  The electric field sho1 h tsx,zhhg2:wn

  Can electric field lines inju6- u4dh4uyo5(.t e )x-uoezk y,unv tersect in free space?

  A solid block of metal in electrosta0 4wx -qcl 9aanjg:m0ttic equilibrium is placed in a uniform electric fieljlgxc 0:a mn94twa 0-qd. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eg p4utg.+ kcl.ach given the same charge, the electric field (E) midway between the centergcgku4 .lp.t+ and the surface is

  A cubic block of aluminum rests on a wooden table in a regio.x8/rf qo (ub2mbdcudj*4u7 dn where a uniform electric field is directed straight upward. What can be said concerning the charge on 7x r/dub2d*j( ucm.d fb8 u4qothe block's top surface?

  If a conductor is in electrost r;ru( /j8z3ju3 lj/pebl b8olatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grou; m4pf( agfu. 6c2vmlg;a*vmf i e2wx5nded. As compared to tffgp *(w cmi2gv. x6v;;f5mem42ua lahe case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of c93vag,,yfen2s* z p zfs8+onfonductors in static equilibrium.

State Gauss's law.

  The charge carried by one electr g *kttjmy6i*8on 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 more protons than ew: 5 a djn1jpgvn5sje5whh, 37lectrons dwj jw ,n 75hhj5a5se:nvd13p goes this piece of plastic have?

  What is the charge on 1 k67xz r3sv* n8te1qxtmg of protons?

  An atomic nucleus ha)e j/k5c msv9 iic8/tks a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, s4/p ps)f xnmtsyw .b50eparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the ma4nx0 sy/pb mftsw)p5. gnitude 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 Nq 89f8,uvsq nm. What is 9 f q,mnvq8u8sthe magnitude of the second charge?

  Two 1.0-C charges have a force betweens1uwj1ea m:v+avl 312lx7 d te them of 1.0 N. How far apart are they?

  The force between a +7 t)rtq h,v*o)iy-(pcm rndx$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, init.oqnj5yqod(9+ hpgs- ially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, whn-q+sg 5p(qy9 d.ohojat is the electric force between them?

  Three identical point charges of 2.0d:: , rwbvuma0 mC are placed on the 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 electrostatic force which acts on the:b0 u:v,ar mwd charge at the origin?

  Three point charges ar .luw+:zra; jee placed 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 thezul +;aw r:.je 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)gkxhct7h. k /;ntzn3 t *hx0a: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 x x3zg7hn0 ;t.hkt *na ch)k/t= -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 a square, and a second poinqj)x;u :hcry x itzf+/mux)f7 o rg4.:t 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 .7 rxfj oyrh) u+ ;xi4/ugmxtcz)q:f: 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); Q29a: o)ry+p rf)notg: l = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wotr)y )a+l:rg po:f9nhat is the magnitude 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, r w ncrs6c/*,hlfk2i20.10 m); Q3 = 5.0 nC is at (0, 0* fcis/2,l ch6rwk r2n). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at th,ckthao, j t:h59a 91 f ,zmymej1wwq,e vertices of an equilateral triangle which measures 30 cm on a side. What is ttjhak5hcf y om1 9e z:mjw,t, w9a,q,1he magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 qo(ds j+5 gp5tm. At what point, on a line between the two charges, wou+5tgjd(5p qs old it be possible to place 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 az:z* 4aeamf w1qg 0li* +9.0-C charge is at x = 4.0 m. Where on the x-axis can a th41fmziza0*w*a: qgle ird charge be placed so the net force on it is zero?

  Charge +2q is placed at theg9msps0u /bqa*lwqp+i r; 4f9 origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is ;um wri0pasq* +/lb 99gq4fps zero?

  A copper penny has a mass osrz*e1//3y f mdd)j ohf 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 attractioiw(d 4q:r cs zge u:5ohwhnzi.8db 802n of a fixed proton some distance above it. How far above the electron is the pr8u(cird4 5 hno:d:he.b qi2swg 8zz0woton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threap) r8 2vnu+qulj5vff, m5fyg4rn9s-zds which are 30 cm long. Both are given injrp+5 flug94f -ynuzm2q,f)r8v sv5 dentical 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 of the elecd)( cw*qa20k udkvb0 jtric field at a distance of 1.0 m from v (ubwd qd0k)j0ka2c*the nucleus?

  What are the magnitude anqvotoieq -1p4+ ni,44ffq: iu d direction of the electric field at a distance of 1.50 m f 1e 4 f nq4:uqtpfi4+qiov,oi-rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is theooz4 /ptk2p3o*g q )qi magnitude of the electric field at the location of the testtqoogq 4)pi/pkzo*3 2 charge?

  A 5.0-C charge is 10 m fri:ep7oee xt; 7inr*, 2-w kvmqom a small test charge. What is the direction of the el ; eiq,n:t-7*oei7x v2epwmkrectric field?

  A 5.0-C charge is 10 m from a small test chamy5r3hyy 49 7lxy4ewqrge. What is the magnitude of the force exqhy7e45 yl xrm3y 94wyperienced 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 separated by a d bfro+nzrxaekpy(ze j12 /84a. 8w+d distance of 4.0 m. What is the electric field at a point b81 ky +jxn p+(/e.2zd4ade8rfr wzoa midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick ; a8l4sp7/hneh:nizjand a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cmhla87 4jzs n;eniph :/ mark?

  A 5.0-mC charge is placed au0 68 q ho()ua2l san/ypl9cgw7td+c 30epupet the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero(utc9)wp 8 0e 07gl6+opy/pd2ns hecul qau a3?

  Two point charges of +3.0 mC b c4k: tbgc5g1and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the kgbc 54t gb:c1electric field at the point midway between them?

  Three 3.0 mC charges are at the three corneym/n 1r3xtw :(kc8xe9kwhyqyy*1 f,d rs of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electn* 1k,8 qywfr:3(wxykc /dxht1 e9yymric field at the center of the square.

  Consider a square which is 1.txl ur:,df/zd3g.7pu e 53eoy0 m on a side. Charges 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, 0u5urf,t pg o ydx3l.eze/d7:3); -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 pkgqpr6p0l cra3( u7n4em*)u glaced in a uniform electric field. What is the magnitude of this p k7(grgn6eu0cl )amqpr4 *u 3electric field?

  A particle with a charge of 4.0 mC has a massi5eowi8cj/c 16 g8don 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 gesb s a:v8 ho-3g7q 3tuf/g0ge is placed in an electric field of 6000 N/C pointing downward. What charge must be pla3gbofqe8-0 u7v s/egta:g3 s hced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carriec a;v..k96gc psl6 b t:he7yvps a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the elec9 vcbp.l:6 6gk7sv;cet. yahptric field?

  A metal sphere of radius 10 cm carries a charge of +2.+)mfq7bzz m) p ,gsk,v0 mC. What is the magnitude of the electric field 5.0)m pf7qs,g,z vzk mb+) cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 5v +8r .t-arjb3 izh ohcd72ay3bod/i 3.0 mC. What is the electric field 6.0 cm from the center of the drjz /atbcv.oibi3ahy5o d8 h+732 r-sphere?