State the law of conserva-t lk+ pw0 0/mspiea3ytion of electric charge.

  Is it possible for two negative charges togi8ylbe 9l2odf+ 2,o 9jqk8 ee attract each other?

  Is it possible for a positive and a negative charge to attract er5f6uscu , 4h v7ibi)sach other?

  A glass rod is rubbe m qs7fj c;5wgdho-*6)jh/ qrpd with a piece of silk. During the process the glass rod acquireswgcqd /;7f 65mq*-j hr)j hpso a positive charge and the silk

  A proton carries a

  The model of the atom showsf . zwai-39ew usj;9is a

  A neutral atom always h spt8w vxc:-m( wze/;b aajhyh/m:n*(as

  An atom has more electrons than protons. Thv d/s 4iy9xo* pjo9vbk 39a(mwe atom is

  Materials in which the electrons are bound very tightly t)tpgsimx458,ii0 sx uo the nuclei are referred topstm)gi0 4,i5xi8 u sx as

  Materials in which the electrons are bo(l50vll)gtun0. - v0d hzuuak und very loosely to the nuclei and can move about freely within the material are referred to ulltg u5h)v 0n kd. a0-u(zvl0as

  A negatively charged rod is brought near one end of an unch, q9(nrhghc:+ 3f)5j jatyuuc(prp8q arged metal bar. The end of the metal bar farthestg 3cu5hppc(h,j +tjqar8(r: u ny)9fq from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are plzk f.ne3)gu 5laced near each other on an insulated table. S5gfu)ln3e z. kphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged vq xnuoqmig*50 -: w,arod charge an electroscope positively?

  An originally neutral electroscope is briefly touched withe:v9 z,dzndfsu*q6 w :r +7kts a positively charged glass rod. The eleeus zs:,q:7 kr9twd+ zfv6nd* ctroscope

  An originally neutral electroscope is grounded briefly while a positively chtk) k,flhz-a8 arged glass rod is held near it. After thehk8,)atlk fz - glass rod is removed, the electroscope

  A positive object touches a neutral electrvw9ml k.dgutn es6y-l+ +mk)3mhj v+:oscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to +:3yk -9lvgmtnkuw .lm m+v dsj)6+h ethe leaves?

  A large negatively charged object is plapm1(k0d d*qjzwg8js 4ced 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 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 bal4*8qm gj1k jw sz(0ddpl?

  Charge is

  What are the units of the Coulomb con 3 ueue2:yg26hnp pvd.stant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is.n4 qz dksbq qsbnj(/-.xy0 :j larger in magnitude than -b qxj. dy/k.(4 nbzqsqs:j0nthe second charge.

  Sphere A carries a net charge and sphere :hwiv1v v,2lnixb6. w mu0t7uB is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostaticuv2uthi:l 0i .wv x16wn ,v7bm force between them?

  Two charged objects attract each other with a certain force.n:po8 rm**9vlh tbxa9u ha)h/:up9 qm If the charges on both objects are doubled with no change in separatiob ptv 9xoqm8 hu:h: *amhl)rp9/nu*a9n, the force between them

  Two charges are separated by a distance d and exert mutual attractive forcy(k pvx7, as6qzzj p2)es of F on each other. If the charges are separated by a dist ya ,7qxspjz ()pvz26kance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forcd q u,/8jq tnyl;6845p yxicsie 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 isy p5ii;8 /dyx4n8qc6quj ,lt s reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. Whawb zj ef;p4i,5t happens to the magnitude of tfi4 pw; j5be,zhe force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What hapzkn7fpwea)7 : pens to the magnitude of the force on the first electron if a second electron is placed next to f7 kz7 )pwe:nathe proton?

  An electron and a proton are separated bymv(qxcn32 2u c a distance of 1.0 m. What happens to the size of the force on the proton if the electron is mvq x3(cun2m c2oved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. s 39mzi,hk5 wl*wh1;v mr l2evWhen 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 v1ri 3;w,v52mw9hz s hmlle*k 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 centcm,h 2n,q yu)jroid of an equilateral triangle. When a second charge of +Q is pla2y,q),h jumc nced 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 vector?w-ixze:5,ft9qm0 ;oiu *jrqj

  At twice the distance froml xe*n1 nrwp.) a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a nedt(u 1y6u5mgki xn-f0gative and positive charge along the line joining thefx y5 1ki(tnumug 0d-6 two charges?

  Is it possible to have 4j m 0( g u:xdaspgbwu71c,qq7mtypg 9dn53n2a zero electric field value between two positive charges along the line joining n1y 0mgtpdd4,qj57bsgn2u p3ugq9w : 7xm ca (the two charges?

  Electric field lines ned+g4 et,kg1u j;.8eql mmdl ,-zgye/ ibq9l h8ar psitive point charges

  The electric field showrhco(e 96yku.)d: p rp m68uwrn

  Can electric field lines intersect in free space?,3*( sorrug8t5 wajb59 u ks0d7jeg7 aekhco7

  A solid block of metal in electrostahec tgu/fj,rs3ir0 h2:,jh t/tic equilibrium is placed in a uniform electrjr0c/ r 3g i,h:hft/u2thsj, eic field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a ho(l 5bq3n*md udllow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center35* l mbdnu(qd and the surface is

  A cubic block of alumi 2s.8uvbh 3baz qks1-znum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge-k.1 hz8ssbbvz2 a3q u on the block's top surface?

  If a conductor is in electrostatic equilibri/ (1 v*o f.fgpf5pberwum near an electric charge

  A positive point charge x uml5v4t(3xc(nsg96ky ,e c eis enclosed in a hollow metallic sphere that is grounded. As compared to the case wx9x 4,(cs3gnu (l yce5evt6kmithout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties n xcy .+(.spr d5;xtwkof conductors in static equilibrium.

State Gauss's law.

  The charge carried by one ef, r5i8c3webh lectron 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 netdma5wsixo:7;vmgf 0; charge of +2.00 mC. How many more protons than electrons does this piece of plastisva;5;m0d:iox f 7w mgc have?

  What is the charge on 11-llvh 3sqwrfv1n pe5+, 5v lo kg of protons?

  An atomic nucleus has a charg5haay)td2tw / e 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 chap +9 +g5j .p,zquaqzcurge values of 2.0 and -4.0 mC, respectively. What i+q zjz+g9 uc.ppuq,5a s the magnitude of the electric force between them?

  A 1.0-C charge is 15 m e -r(ldc .azv4a*ds d2j3xph(a/cr ,zfrom a second charge, and the force between them is 1.0 N. What is the magnitude of the second chargvpla3e./dja4,crszd *zh2a cd x( r-( e?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are tx-. wh 1jm)et,z-bu s detgoio6i74k5hey?

  The force between a (07 s0glp6ypkx (js ;ieky) xb$30 \; mC$ 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.jp7(ns xo ,w2ul rh7h90-N force. If they are( uhxr7h n9sw72 l,jpo moved 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 the x-axis. The first wm.2h4;l v*cttdt i*c charge is at the origin, the second to the right at x = 50 cm, and the third is at t wc2tt.*i4m *dc vlt;hhe 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 placed on the x-axis. A charge of +2.0 mC is placed cjq +.rkn.or4 at the origin, -2.0 m C to the right at x = 50 cm, and + kj.ro rnc.q4+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 ip3l9/ ura ohv.q v yxw831u-qare located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC h3up x vlo-aq iwv18/qu93yr.charge?

  A point charge of +Q is placed at the center of a square, ankx/ yqtx/zj,60 i2dde d a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N a y2q/6e/dj z 0xkid,xtcts 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 = 5.0 nC is atk we(ss)hnhe .p6 p38c (0, 0). What is the magnitude of the net force on the 5.eh3s)pehpnck ( .6ws8 0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0,pv.i p:f(9ymg/ *5ofu+ ujp kw 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the netwmg j9fo*yv( ki+pu / p5p:.uf force on the 5.0 nC charge?

  Three identical charges of 3.0hjjynj/3 sz)do7 h*5a mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acth hn jasz/7) jo*j35yds on any one of the charges?

  Consider point charges of +Q and +:5:aur.q rt4ou9a7i-b hx oqa4Q, which are separated 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 electrost x rqu:o45aqoi:-9.7hur atabatic force acting on it would be zero?

  A +3.0-C charge is at the origin and 6nf0wb)gxr;x p8fzbl )v z1c,a +9.0-C charge is at x = 4.0 m. Where on thefgx1z8 l;zpn),f6xvw c b0r) b x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed ato 234url(kboj qc -.qa the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so ta2 j( 4.3oqkqobcr u-lhat the force on it is zero?

  A copper penny has a mass0s:)7zt-. spvnmnxx 8xanc1 p 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 ag9iu6yr )u jiefp2 b4.dainst the force of gravity by the attraction of a fixed proton some distanyuufi jep246. 9)idrbce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres a4suwz:eb ;jdot 1 ar*1re hung from a common point by nonconducting threads which are 30 cm long. wjs;dt:1e *u4 o arb1z 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. bbiq m-p4p 7rm )63uzi What is the magnitude of the electric field at a dppub-imqiz )b4 376mristance of 1.0 m from the nucleus?

  What are the magnitude and direcq**80,ynpo m ,jqwolction of the electric field at a distance of 1.50 m from a coq8p m,, 0*wlonqyj*50.0-nC charge?

  A 5.0-C charge is 10 m from a smawd3o2 dqiw4* all test charge. What is the magnitude of the electric field at the location of the awow3dq4i*d 2 test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directionp)mg o4f7wr b 4d(cb0f of the electmprd)fc0 4 b(4og7bw fric field?

  A 5.0-C charge is 10 m from a small test chargeh3 uam 1-txon1. What is the magnitude of the forcth 1-m1xun oa3e experienced 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 ux5 a4q6 7v2au5ziz/sowu tsb,c8 y5e.koe5 pand are separated by a distance of 4.0 m. What is the electric i 5xzub ze6u/swu,72qa 8t 4 copa5ovky55s. efield at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter1pea.*gsi w.j stick and a -4.0 mC charge is plaj. 1p*s.eia wgced at the 50 cm 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 chargew03oq-ssv, ,gyh ,zmk iqm,y -ws ,o3vzs, gkh0s placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC a/htyj+* qlf 0bre placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at theb0q *jlt+h/f y point midway between them?

  Three 3.0 mC charges are at the three corners of a square of swky) w.pm+jd4ide 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the c 4wkpdw m+y)j.enter of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners oa4bra5 o ;k32a 7l2pm zon3uyof 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). W2ba;5o27uroka3ponl4y maz3 hat is the magnitude of the electric field at the square's center?

  A force of 10 N acts ono- 1s9: ziiut w:rnuf4 a charge of 5.0 mC when it is placed in a uniform electric fiel wf1u4tunrs9 -oz i:i:d. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has1cdwj 6mt5cnb +1 0rxd bk3,mc 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 p2hw.: ab,bp gwlaced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to beg 2,w.hbp:awb suspended?

  A foam ball of mass 0.15 iv)(;4*j axicpl yli,i;5ori0 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agi 4v (i,jypai;5r l;oc*li)xi ainst 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 is the magnit5a2 zfx91gzgq ude of the f5 g29azzx1qg electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3 w v/:n(ik1zjum2w9sk.0 mC. What is the electric field 6.0 cm from the center of the sphe:uj z(s9k 2mvw/wnk1ire?