State the law of conservation of e v8pijadocc4h . 7.j:ylectric charge.

  Is it possible for two negative charges to 1yl,1 f zp /k659j,weejooq )9gtziml attract each other?

  Is it possible for a positive and a negative charge to attract .w89nfu n. qd-7ibm deeach other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodb)z, r+ kzloo6 acqu) r6kzol+oz,b ires a positive charge and the silk

  A proton carries a

  The model of the atom rjb7ugv6r. c836jouc shows a

  A neutral atom always v -2m:gre c5rh;t,k xchas

  An atom has more electrons than protor+psu 8ng)m8en9q0rw ds2 3mons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refetc1k fe+glq879roua4f r, . hn9pea(orred to aspee . fr9 oacrhn(f9q1aukg ,4+o7tl8

  Materials in which the el2je/w/ar je/xzbxh .4ectrons are bound very loosely to the nuclei and can move about freely within the material are referree/z/ erjj w.xb/4x h2ad to as

  A negatively charged rod is brought near r ci :0zm,s7a86tzvqfw* bkm. one end of an uncharged metal bar. The end of the metal bar farthest frof,:rvw mamkb8zcsq *i.7t 6z0 m the charged rod will be charged

  Sphere A carries a net positia,ey8c6:csp l ve charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that isy6,8e s:lcac p grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope popp6w 91mz0yz)dsd5ji0 k1rb6xn0h qq sitively?

  An originally neutral electro++,ekk o p5e3dqr+yddw . c+hqscope is briefly touched with a positively charged glass rod. The electrqoe5+h y 3ddwk++ cq,dr+pke .oscope

  An originally neutral electroscope iszn:zo v3s5 1ts grounded briefly while a positively charged glass rod is held near it. After the gls o sz:5vt31nzass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. T7,5o uqh7k k0hio(8 bcjp;ev bhen a 5jb77b 8ipkcukq0; h, ovheo(negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tablnhjjcfl +y) iono61 wtq xvl7;u+7+ ;le. 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 negat w+n+;joqtu6lf y1);h lnj7+iox lv c7ive 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 Could z2(kyhokt:vxx,4li2 s)d u+omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargemtu/9tvolx 1. is larger in magnitude.ltmtxv 9u/ o1 than the second charge.

  Sphere A carries a net charge and a3x hpxctfov k(m7 5i92 9w5odsphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between thc92ifv9 pw3 oxm5dto5h 7k (axem?

  Two charged objects attract each other with a cergljg o6k:lnt* 0ao)7 stain force. If the charges on both objects are doubled with no change in separatil gkn gsa6oo 7:0)*ltjon, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces iqk*gw;2,yg38 ;xr -clzj spip 1: vfeof F on each other. If the charges are separated by a distance of d/3, what are thex 38ipes1, kf ;vq giwy2cp:*; jgrl-z new mutual forces?

  Two charged objects attrk3pe8.ghflzb6 - noq :pclj52 act 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-fo:on2j8 gefqh5bl3k-.p pclz 6urth its original value? The force is now equal to

  An electron and a proton are separated by a dista:qsj-xh 2g+ yb/ lw(mm2evo:fnce of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is plac(v/hw -xygqm:j 2m 2b+loes:fed next to the first electron?

  An electron and a proton are separated by a distv7;d t:i(1xh*dr; jnc hmah2 nance of 1.0 m. What happens to the magnitud2c i 7ddh(* ;nnx;ahjmvr1:the 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 ate8rw zd 6 k3twke-+/m 6riksty--xe( distance of 1.0 m. What happens to the size of the force on the proton if the electron is s+iz k rk /3td8mxtre ytwe-6w6(-k-emoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poibvev-tiay ,6cj(k2j4 nt 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 on the positive charge at the civvjb e4ya-c26j, k(tenter of the square?

  A point charge of +Q is placed at the centroid of an equilatxp5z:ut05gx v pi :b0ewxt+o+eral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an elew:+0xpogp+ zi5 ut0 exvtx:b5 ctrostatic 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 9g h; (j27cf hj3ezo+zb*qugja vector?

  At twice the distancdy8utb wc8es -7 r/xe, 0jbd8p4o g/kle from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negativuji 7b x0(ltnvh*z)wm.5zw u7 e and positive charge along the line joining the two c7xjwl(0vw hzt)nu i.* uz5m7bharges?

  Is it possible to have a zero electric field value between two posik8vrjx8p (vy; tive charges along the line joining thexvp r;yk( v8j8 two charges?

  Electric field lines near pq-q b .:) 2zi6xym g+81sm9qmnrylr pnsitive point charges

  The electric field showzrxoj , 87qb6xn

  Can electric field lines int4d 7(sd;oq(1chxeg8 -u hitebersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in aiu)kkr82ol 3p0nmp /n uniform electric field. Give a statement concernin0n) /2prol3 mk8 nkuipg the electric field in the block's interior.

  If a solid metal sphere and a hollow met9bkt6ye3 3f 9ffn+ahpal sphere of equal diameters are each given th9ypb9fkn 6h3efatf + 3e 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 unmfe5y)k* :bw riform electric field is directed straight upward. What can be5eyrb * fkw:m) said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near antp4rv4-.(9pmyx h5 l mzvkd*q pkt14 e electric charge

  A positive point charge ico5+d 4lz+tqrs enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a p tr+cqo5lzd+4 oint directly above the hollow sphere has

State three properties of conductors in staticnl.-c ub99tp/cu 1ld i equilibrium.

State Gauss's law.

  The charge carried by one electron i8 zqvs5nzleb/ /) n-wjs $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has)*i(ut lvvhtrec,j ,ps71u q* z-ca q8 a net charge of +2.00 mC. How many more protons than electrons does th,u u8 jl,e p)7vr c*-tz 1tqs*cavqh(iis piece of plastic have?

  What is the charge on 1g815ufrt 1c qo kg of protons?

  An atomic nucleus ha t8t. nt ).9w-ybbpdows 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 val,vy wa xu49b4ebe98aww.; ,vga .fv djues of 2.0 and -4.0 mC, respecti .eg9av 4;f ,w,wvebj9 4buxavwdya.8vely. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15fnh9j)j y l00f m from a second charge, and the force between them is 1.0 N. What is the magnitude of thnjhlff )9j 00ye second charge?

  Two 1.0-C charges have a force between them b- h6: tgq5cxoof 1.0 N. How far apart are they?

  The force between a (alt dpq 96k(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 1.0c k mr91y/j8xig -0ckd p5ed5d-N force. If they are moved to a new separation of 8.0 cm, what is therdx9pj0 5dm1k /5k8- ci egcyd electric force between them?

  Three identical point char0 pqjp3t z 6x2: bng17qc9lfbpges of 2.0 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 at the origi6p xcj qb9 :p70tg2ln1pfzbq3n?

  Three point charges are p)2 trbgs 2l,)zk0d.uwy)dnl nlaced on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to gysu0bl)dkz)d2)2wt rn , .nlthe right at x = 50 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 followiax1cex 7)e 6rcng positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 eccr axe )6x71mC 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 a square, a.zwu cs;re9c7wpr n v0tjh4y+8t3.f ynd a second point charge of -Q is placed at the upper-left corner. Ith +; w08yr.47 .cp cwftestzunv3ryj9 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, 0.10 m); Q3 =mag e5)ar6 5xc 5.0 nC is at (0, 0). What is the gacmr5xa e)5 6magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Qjv -7n,c+- or eb9n:uz6 dmsmr2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, b,s-:v+c7o-6m dner zjn9mur 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed v3 g/atrq r( piv .kecm0h*)z++txmy *at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any+*q)pyc0vmm.ri *a(z g3 kr/tx vth+e one of the charges?

  Consider point charges of +Q and dh.ybmgbi; k( -gsdn*s s.;)y+4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would*b )s-bdy.; gdssik;m. ghyn( 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 a,b jtkl.3rv /nnd a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a kbtrnlj3,. / vthird 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 = 2z0u cf:r)e ruib1ms, 88b-ujha. Where can bc 0h1:ezrs-,i8u)urfm 8ubj a third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3., tho+i2ez 6wjh1j.dw0 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 gravitcv wm lkh::br: o2lg;)02pmpk57fia h y by the attraction of a fixed proton some distance above it. How fhk:;cw)lhrmm:o2 g i f2b: 7 vkp5lpa0ar above the electron is the proton?

  Two 0.20-g metal spheres are hung from apgw af3yb,+w6 common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart un 3pw6aw+b,g fytil the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus hasph 7kd +zhv5 m(tq8fec jqw 4df58,*yp a charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m frp(q,8+e tkjd7 hmpyh58cwv f5zq 4f d*om the nucleus?

  What are the magnitude and direction of the electric field at auvmu: ngv.m 1o.72u sx distance of 1.50 m fro:sm7n.vm vxou.1g 2uum a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is0 lqbpib,+1 0v vzfb*p the magnitude of the electric field at the location ,p q* 0viv1lbp+fbzb0 of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of wh7-evwxb 1t:the electric field?bhetw7v1x- : w

  A 5.0-C charge is 10 m from a smaeyu 6-9,w)( gj; s eitl2sxxjull test charge. What is the magnitude of the force experienced by a 1.0 lx;wusijj ,2ege -ut9 6 xsy)(nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 va *x uihzd:(6C and are separated by a distance of 4.0 m. What is theu (vhaix*zd6: electric field at a point 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 chargvt ay4c m e lej10*d 561b9kby)cnwt*ge is placed at the 50 cm mabd*nc9eg5*mka0)t 11wycbye 6v l4tjrk. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is pla34apr ut8 fk4a nl(64ynyh9 mrced 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 r6ayrumk4 p(tl44f8nya 3nh9 field zero?

  Two point charges of +0 qxs20wty zqj 1(b/pq3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point mi2zsby10xqj/ p 0tqq( wdway between them?

  Three 3.0 mC charges are at the three cornms7q 8 d,e od1mj(dacr.e:)lters of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electd j 1eds:cod8a,t7e)lm(rm .qric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargesp8ey52qr ot5o 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 isopet85 o5 qr2y 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 wg soc61,*p*jyl3j o ia uniform electric field. What is the magnitude of thiwc*6j*g1s ol,p j3 oyis electric field?

  A particle with a charge of hpz;x: :mqk2x 4.0 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 electp(dw f520**vfx x hapsyiqw1 72j1uqkric field of 6000 N/C pointing downward. What c ia(51wx7x*j1qqyp 2wh2ud0 fkfs v*p harge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a cu2guq55 jn8hc harge of -2.00 nC. The ball is placed inside a u qhn5gu852cjuniform electric field, and is 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 +2m2aepapc)9n /q)h 5ut1o 5xhg.0 mC. What is the magnitud t) mpho1q)c2aane/ u5h9 xpg5e of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is thejsv4jg jmik. )ie .*m po)fh4.rc9r7d electric field 6.0 cm from the center of the sp 9 i4mriv jokgpcje sjfh).*74)r..dmhere?