State the law of conservation of 7-jt:j2 sofh,sop+m aelectric charge.

  Is it possible for two negative charges to a 11s01rd lqlsfttract each other?

  Is it possible for a positive and a negative charge to attract each othez0g8o,8nqc xr; tjc ;vr?

  A glass rod is rubbed with a piece of silk. During the process the glassrgdgnpn + d *b-e-72k,c5 tcpd rod acquires a positive charge and the sil7-*-erg gdcd,+ nnktdp 2p c5bk

  A proton carries a

  The model of the atom shows a,;pgcc8 i4us .pz f4sn

  A neutral atom always hasxi0 rf58 faw:n

  An atom has more electrotkvqq4(m *ytuvkor1 /p ,:vzs4nd,n6rp j;h4ns than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are rg9p+s-fl :8 hl nz:9+5ell x1ongpnyfj:ml .eeferre:js p:+gzl:9xo.n e ll15f8lf-mhngey ln +9pd to as

  Materials in which the )mc;-4nz xv htelectrons are bound very loosely to the nuclei and can moveh4tm ;x)z-cvn about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bn/1pf n(5(mnd9)( hmkmii r1joptf i2 ar. The end ofdhr(n1jo(2np1ifm n5 / imm9t)(ikfp the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They a2f 24gd7iwr kdre placed near each other on ki42 2 rd7gwdfan insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charlqkgh*5 7(isixs7z( o ge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively charged)yzd swtw*w(:, qnpqoi-m 2 (g glass rod. *2( ,zp) motqqws wg-w:yi(nd The electroscope

  An originally neutral elect0qs+thks )lv8w3:;g f,dww/zuch xs0roscope is grounded briefly while a positively charged glass rod is held near it. After the glaskswfdlv 8tz3:h0w / c h+x,0;swuqs) gs rod is removed, the electroscope

  A positive object touches a neutral electrosc(e0 3*rmnocpm ope, and the leaves separate. Then a negative object is brougenmop 30( *crmht near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object iwg 8q y)01 l8gut8gpphnozyj 9w ;u:e1s placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops b p;tgn)hz9pe8gy q:o jl1w8ugu81wy 0 efore 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 Coul9rq)xsc1xy;, d rxh/ romb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charg4yo :75i m6 i:zr;xeksnx1i- l:yesule is larger in magnitu7:si el n-6 l :yiokz14x yemu:i;xr5sde than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near et x*arv j()8snach other on an insulated table. Which sta(8)xrvjsnt * atement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the 1hcu njt 60xf7pt+1k2vi z :alcharges on both objects t7z01jac+ uh6i21 pvftln: xkare doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive foqc//+;tbt+/ jbfn d ehrces of F on each other. If the charges +bq;h/jnb f tc/dt/+e are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. W5xiq9p5os8 l dhat happens to the force between them if one charge is doubled, the other charge is trip9xos58 lp 5iqdled, 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 dfn0vgv u,8 pq f.r c8+3*(etp ony-wtseparated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next tep*v-8tnfdqt(u, + w8 .vrpyfogn0c3 o the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What oy)/kg 2et*9xtp8d grhappens to the magnitude of the forcerg8yd)*k/ gpt29x e ot 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. What1nzf5qs6dv8uf9e qaz a5)y4 j ey ;0zc happens to the size4fe5azjyv8 z9 1qq) n 6a05zyf;suedc of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q i;w bdi)l(8e5t 8ajrf os placed 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 electrostatic 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 oai8fe ;o(r5lwdj bt) 8n the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equil61 -tjq yys.gnateral triangle. When a second charge of +Q i1 6 jtq-sy.nygs placed at one of the triangle's vertices, an electrostatic force 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 not a vecto:x :bmq -sy tbn/f7fz7r?

  At twice the distance from a point charge, the strength of the electric fielzmo 9ph3:1 qvkd

  Is it possible to have a zero elec g vgo3yb8a n6e.uh66ptric field value between a negative and positive cheu 6g6 6. gby8nho3vpaarge along the line joining the two charges?

  Is it possible to have a zero electric field value betjyl4 lhoy8l,tjfg3hji:n/nqfvu) 9 r/e - n+/ween two positive charges along the lin //y lhf+ hetuj)o:j8lf,n / 4 -grnvjyiq9n3le joining the two charges?

  Electric field lines near psitivlwezk4 psh8h8h :- w*je point charges

  The electric field shown zgp -eud*t usu19vff,po3h4 4

  Can electric field lines intersectq9uag,ei0a: 8a g:um:azy1n a in free space?

  A solid block of metal in electrostatic equijmc*xt lev4) nh23qa1librium is placed in a uniform electri2e * 3m4atc)vx jq1nlhc field. 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 ea h2bg bli862 ,zsrw5-ron;jwmch given the same charge, the electric field (E) midway between the center and the surfa-wbw,5i lmbn 6;rsho 282rjg zce is

  A cubic block of aluminum rests on a woodk2j1/ w15d pw2lhisyken table in a region where a uniform electric field is directed straight upward. What can be said concerw1dsh 2k2y w15k/jpli ning the charge on the block's top surface?

  If a conductor is in electrostatarkkcy 61p z(3l 20ebtic equilibrium near an electric charge

  A positive point charge is enclosed in fgzjs; xokf* wgf5 xz-y+/+3c a hollow metallic sphere that is grounded. As compared to the case wz*/wy xz +kfsjo+3f c gg;5fx-ithout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilixh+ (,m)pf m0lyof6f bbrium.

State Gauss's law.

  The charge carried by one electron is 1df. nd xwl/c7$e = -1.6 \times 10^{-19} \; C$. 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. kr eq5r/nf.l 6How many more protons than electrons does this piece o kl6fnqe r/5.rf plastic have?

  What is the charge on 1 kg of x) ; 9h-khvmmmpvh47vprotons?

  An atomic nucleus has a charge mh1y; 7 xzyg8o7 omlbb,r)v8oof $+40e$. 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 8v6gvex zz+(6ysmn ,c and -4.0 mC, respectively. What is the magnitude of the e+8cmeysvx z(v6,n gz 6lectric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force efj b7;; igeb32u1tnnbetween them is 1.0 N. What is the magnitude of ;eb3u jn ;2e17tnifgbthe second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Howne,tknkvu(f25 o o go7grfr( e.tdw r*+1lr1) far apart are they?

  The force between a o*3-y xqwi0lv8sx0+ fqhx b/n$30 \; mC$ 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.z*k89td8q gdai8kk.ysn9j h; 0-N force. If they are moved to.8d8dk9 g zj*hin;a q8k ksty9 a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of vr dwv/td c*- .,x9hqq2.0 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 charge qt*hrd 9 x.-w,vcq dv/at the origin?

  Three point charges are placed on the x-axisy+x-) s k9 hmgm,o5h4: bohcfzoo(rf8. 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 sx4f 5ch-: +rmkofy9hbm8( og) ,zoohcm 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: Q428mwht lro. f09 omzl1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x =wzomr420l.tfl9 m8 o h -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 o2tf r*/b lzxd(f a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive chardt rfbxz/( l2*ge 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, 0.10 m); Q3 = 5.0 n5hsu-e8 )c uvw,.i vdssc.3ji d4loc6C is at (0, 0). What is the magnitude of the net force on the 5.0 nC s4)d 6.-ccv. iusol8wucdjhv s5ie 3, charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 =wqf+8x;m4 wfogau*q g-0z6 ufhvmf 8+ 5.0 nC is at (0, 0). What is the dire +ofwfgxz*4f u8mm86+ gqu qv -aw0h;fction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verticesyw.0;whclq ed(mo -d/ of an equilateral triangle which measures 30 cm on a side. What is the magnitude of thmldh/w; cqo (-.edy 0we electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what p4hul, y(mmn azwmkpyo i/ 0+6*;o h.oloint, on a line between the two charges, would it be possible to m(ml z ,o.*a 6hyno/yhpow;4 ikmu+l0place 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 +9.0jwo/ohp kmk.7t9v56zo(n 1my-C charge is at x = 4.0 m. Where on the x-axis can a third charge bp vm(wmoo 7jk o.51ynht k69z/e placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. 7jg46rt cbss/5 r pqz4Where can a third positive charge +q z/6b4 gcjr5pts7r sq4be placed so that the force on it is zero?

  A copper penny has a mamafe 1 0kvj,p3rm13s oss of 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 gr9uq4egb mzj. 1avity by the attraction of a fixed proton some dist1jzg e9 4qmub.ance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threa,( ng9zv0bf r9eockhv )c-: kkds which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart rv:gkhkbo)k ez9vf(,c-c 9n0 until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of n kc 06 ewljb66r48uab+40e. What is the magnitude of the electric field at a distance ofbjur6 ca 08wkb66le4 n 1.0 m from the nucleus?

  What are the magnitude and d1(5o er0ou co,(ndesbu+-aq5sx5 lb virection of the electric field at a distance of 1.50 m froma1s 55-+ 0bulcu,eno (dor bov5exsq( a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small i4 slln5s)3ed test charge. What is the magnitude of the electric field at)ilsse4l 5dn 3 the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dirdlp.6w 5eyvi j, 1mzv3ection of the electric fiel evmj, dv6p3wy51iz.ld?

  A 5.0-C charge is 10 m from a small test charge. What is the magniz.(ur6et rmh gf;/d+ltude of the force experienced by a 1.0 nC charge placed at the l.t6u/hlrefdr+z;( m gocation of the test charge?

  Two point charges each have a va*hhgl6kmeu r)bp r4;* ,ermk2lue of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point mlrupk *r4;r6)ke*2bhm ,gmheidway between the two charges?

  A 5.0-mC charge is placed at xtf n.8arsm:ydb, 0-gthe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. 8y-x sgbn:afd rt,0.m What is the electric field at the 30 cm mark?

  A 5.0-mC charge is place od4jf6-u( wyfl7u9ga d at 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 z gufu -f4 dwo(y7al96jero?

  Two point charges of +3.0 mC an 2vaocayd0s; (d -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the esc(d0 o y2;aavlectric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a y ak (8fie;r(,j-8e*odfyfc w square of side 0.50 m. The last corner is occupied by a 8jkwfe (r*fdye,8o-c ay(i;f -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 aafjl2,:pft1ku2;( mu +tenl r re placed at the corners of the square as follows: 2 1 m+(pelk2u :u;rtt,a fnjlf +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 uniform elesn. jbj:ls9o k1 +u0cictric field. What is the magnitude of t :uco. 0 nbljik9js1+shis electric field?

  A particle with a charge of 4.0 mC has a mass of;8tkgi. 2hw s j+rrnk* $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is pl7y-lq, kx-w y es;zqxd q7ia2)aced in an electric field of 6000 N/C pointing downward. What charge must be placeelak7y7sx )2q,; w-yqiqd x z-d on the ball for it to be suspended?

  A foam ball of mass 0.15-fm .qp*aui 1rl-n(ra 0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is1pfln r*raa(u.m -q- i 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. W)+tjjd.uo 6flxwjdrgb)9 :-phat is the magnitude of the electjwjd)fj.:t + ou xp )6br9l-dgric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 c y.p ajyj ;q65 .bgozm0;e9mngm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of thoqe.n6a .pj9;;zj gmb50yygm e sphere?