State the law of conswk9f o ; h/jk)mhi) awx j1wg4v;-8oq/a3ix ntervation of electric charge.

  Is it possible for two negative cha9yeoh/1 buli1rges to attract each other?

  Is it possible for a positive and a negative charge to attract each oth(*5yzr xc 9mmjer?

  A glass rod is rubbed with a piece of silk. jnqx0hcyn6 x w;(it1(q0ki ;tDuring the process the glass rod acquires a positive charge and the sx q1i6(ny;0; q kxwjct0int(hilk

  A proton carries a

  The model of the atom sho+e)c)n ja5f -mvqoqkw1ng 5, ixjt8-rws a

  A neutral atom always hasguy9x+ 9 o:wt(w7grhg

  An atom has more electrons than protons. The at1gi vy .vx(89thd:lex om is

  Materials in which the electrons are bound very tightly to theu., kc,b36rv m1mvuzevu o8so y:l98l nuclei are referr,uk1 z6lsbyuel:vov8m u,r3cvm 89. oed to as

  Materials in which the electrons are bound very loosely to the nuclei and c1i fm1) e6j0ok 0cnxkoan move about freely within the material are rk c)0f11o0oxjnkm 6i eeferred to as

  A negatively charged rod is brought near one end of asx.. 96tfujr qd5 sg;af1qdf 9n uncharged metal bar. The end of the metal bar farthest from the cha.;d. ju5 sx9rfsf6 f qa19gqdtrged rod will be charged

  Sphere A carries a net positive charge, and sphere B isb/ eejsvj;;bx8rd(wt/.e .rp9 cj 8 qk neutral. They are placed near each other on an insulated table. Sphere B is bri/ptje8x evbkb(9dc.r j 8;j;rw.s/ qeefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope poswz.xa34 t)i2 t nj idhw7:zeo4itively?

  An originally neutral electroscope is b/gdaa hxq-,6driefly touched with a positively charged glass rod. The- aq6 ,gaddh/x electroscope

  An originally neutral-l+s2 j vu; 67w-hhcxhaas zto6+f:pj electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is wh+ juhs-2+lac 7;6 fajx6-z:tsh vpo removed, the electroscope

  A positive object touches a neutral electroscobbhcn ru0j1)7c /j 0pipe, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it0r / )jn0h1iucbjbc7p. What happens to the leaves?

  A large negatively charged o+lax0pp7 y1iq; k /rlpcf yz9m:j- v+wbject is 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 al+iq mk r1 9yfpxjp l;-vc/a70zp:y+wlong 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 Courcmyf /;z,j p/5)qyh9hyt0 pxawk7k+lomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fiu8fk- wzd 8uqoov 5k+f6s.pn.rst charge is larger in magnitude than the second f ..p w +v85oku-8qznod sf6ukcharge.

  Sphere A carries a net charpqo)n( thh19d ge and sphere B is neutral. They are placed near each other on an insulated table. Whichnh d9q ph)to(1 statement best describes the electrostatic force between them?

  Two charged objects attract eos ruo:ihn +.e6on *)rach other with a certain force. If the charges on both objects are drn.hu :seor)ioo * n+6oubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attrzq2hybq2,.h p9m,gt nactive forces of F on each other. If the cha.,g,y 2p h9qtqh2zbm nrges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract ed ,er+z7mqis5 ach other with a force F. What happens to the force between thd,eq 7m5+rs ziem 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 separated by a distance of 1.0 z j2:3jug y2 3qrn,ionm. What happens to the magnitude of the force on the proton if a second electron is placed next u2 gn: 3yr,3ijqjn2oz to the first electron?

  An electron and a proton are separated by a distan-lh-thzxqe kl0k4+k 8h z6x8nce of 1.0 m. What happens to the magnitude of the force on the first electron if a second elxh80x+ knk 4kzht-8z-6l lqehectron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happechg-yr 7qxh)c ;nz94ens to the size of the force on the proton if the electron is q9hg ;n4cy -xe) czh7rmoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center o 72xcunb0)dlq g.js x0l an(j)f 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 ofu 2s)x0gn(j0.cxln jda l)bq7 -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 equilateral triang:r9 e4(zx*mcoj axvc, le. When a second chargv zer9cx4 ,(ax*oc m:je of +Q is 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 v1br o0xsyu-vhy /-)tvector?

  At twice the distance from a point charge, the strength of the ele ij.; ea3m ohn c 9sa6/(whhqe0a*tv+bctric field

  Is it possible to have a zero electric field value between a negative and)l*rx)ft0h .eo,ib3kks pe4 l positive charge along the line joining the two chrb 3*0sl4kop.)hx e elf i)kt,arges?

  Is it possible to have a zero electric fo i ttxx-89 x2dqq03olield value between two positive charges along thoxx-tlq8xiq d23o0t 9 e line joining the two charges?

  Electric field lines near psitive point 2gzn d1tr:ug4hog:z6 charges

  The electric field shvyyh1 zr dld ;oq* (2wl9zcf0dw:yh-6own

  Can electric field lines intersect in free spacq5kmotw78j+5t ymp7b e?

  A solid block of metal in electrostatic equilibrium is placed in a uniform e7v.f e7z4xh qqlectric field. Give a statement concerning the electric field in the block's interi.v4 efh7q 7qzxor.

  If a solid metal sphere and a hollow metal sphere of equal diameters ar0(p9o7p tvgca.5tcy1y;njdj e each given the same charge, the electric field (E) oadyppt .9cc g 0njv(5j71yt;midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a u y1g(b*+ i/ wagta8ygfniform elecyw*/ ( gag+f8ab 1itygtric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric cha4btbit 0drkg5)*f v9 erge

  A positive point charge is enclosed in a hollow metallic sphere that is g6lubj -os12eo)h roa +y76owgrounded.+ ogoo2e6 1oa7w u-yrsh6bl)j As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conducfwe 55go 2z8*1tepw-zfrl gcp t*s/y.tors in static equilibrium.

State Gauss's law.

  The charge carried by fl/)h wsmabmi/wzk p5w3t 1 3;one electron 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 e jwvwf:we (-x3lectrons does this piece of ww-3ve f(w:xj plastic have?

  What is the charge on 1 kg6 8i3wxwln+qtfb z+2(5zbi qc-w1 rwc of protons?

  An atomic nucleus has a charge of 0pa f)khe4p;blde)t4 $+40e$. 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 charg;u2dv,s3-eb r:v dhy ue values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electriudh esvd3 ; uv-2yr:,bc force between them?

  A 1.0-C charge is 15 m from a secondwg 9 oh/ky8 qgjs x4h6 7e)viw4gp11pp charge, and the force between them is 1.0 N. What is the magnitude of the second 1oh4 vggisp w61p)hg8 9pe4yqx7w j /kcharge?

  Two 1.0-C charges have a force between them17folex 1+cf chac/, x of 1.0 N. How far apart are they?

  The force between a mbm d-rz cbf x:;5eon+to-,k) d,ls8u$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experienc3y1(0jysy8jtu ,hppze a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is(p1 t 0yj,3jyy 8phsuz the electric force between them?

  Three identical point charges of 2af w1r6khdw7e.ojbv5/t o)y/ .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 m.jr75 veykof6/ h wo1)atbd/wark. 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 mCjuq:v mq,kuvz 03o461i- tlpc is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magnco 3vj q qk:p-6,1vl0umuz4 ititude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located awlusu(b;y9r3ly 9ao0v a,nq 3t the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00wqo;330aul9say (9 vry,ub ln 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 charge?

  A point charge of +Q is placed at the center of a square, and a sewq yltvy.d2k-e3tyqqc z:5o ,f4: e 5kcond 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 cente5z-eq,v. o5qw 3d2tek lq::4ycyyk ftr. 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 = 3ug bfjz:n+(xrlo55 b-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net fon:j+5bu(lrg3zb x5fo rce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.3p2 mu2d5pwf-xb - fb.i0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force pdu2 w2bp--xf .b5imf on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the*qotuho )nk3 : vertices of an equilateral triangle which measures 30 cm on a side. What q)knou tho:3* is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are o..heiirotg .dy zks 6yj(6 ,)separated by 3.0 m. At what point, on a line between the two chyhsor izy.6dkoej6i..g (t), arges, would 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 a +9.0-C charge is at x = 4.0 m. Where on3n7xf nfbo 27 iyr2kc3 the x-axis can a thixro 32bnk3fi2 7cf7nyrd charge be placed so the net force on it is zero?

  Charge +2q is placed at trq+wd 0t/-p,ym iss.2xc:kazhe origin and charge -q is placed at x = 2a. Where can a third posiw-q y .t+mzda:,cs0k/six 2 prtive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totqas mp7; 67nccajbi*-al 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 attragjsa5f- e n1h,ction of a fixed proton some distance above it. How far above the electron s, jaf-eg 5hn1is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconwit)ds9 4y)gt ducting threads which are 30 cm long. Both are given identical charges, and the ele4t))igsw ty9 dctrostatic 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 char*gvy*pd,v - rnge of +40e. What is the magnitude of the electric field at a distance of 1.0 v,rdn*vyp-g *m from the nucleus?

  What are the magnitude and direction of the electric field odgzb0k e.b:7at a distance of 1.50 m froe :obdkb07 gz.m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small tes02u3vvpl bcr,jpb 7zl-urt5 +h)-yua t charge. What is the magnitude of the electric field a t+pzr,-3 5rbhapcl2u) jl7u u b-vyv0t the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. jq00hvjnnzx*4+s.r e 9ps lo0+2z m6+sh dwofWhat is the direction of the electric fie0fhs0ls* +v6+ x0 z. hjw 4jeod zrq9on2+npsmld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudeqif5g;xz-*): vd -ybixm hb0ps*qmxy+1 hro9 of the force experienced by fr m mxgvpbs;zdbq)hy-91i: i-o +0* 5 *hxxyqa 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 sepese,; bwsvjw, q647pen qe lg()):gwiarated by a distance of 4.0 m. What is the electric field at a point midwayeqvlep7;w)q s i,,4gn 6 b(sjwge):e w between the two charges?

  A 5.0-mC charge is placed vl() n8x q06kz a7b-7qcbiv ooat the 0 cm mark of a meter stick and a -4.0 mC charge is placed at 8a)o vqlqnv7b(0-kcx o 7b6iz 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 krc5bd i)i:hz: .c tz5and a -4.0 mC charge is placed at the 50 ci:5 b)rzic:chzkd. t5m 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 r+yi s-2 ,p-nnz1 s73eemiokcq5ma z)mC are placed at x = 0 and x = 0.20 m. What is the magnitude in5+er2ms1zq z)mo -s-aien 7ky3 p,cof the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side6rg fhq4ed.* q 0.50 m. The last corner is oc.grq4 h6dfq e*cupied by a -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 are placed at thcnb6xfb/ eu 6;e 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 mafu6/bc 6 xneb;gnitude of the electric field at the square's center?

  A force of 10 N acts2j9 2cuuhft4 nqdw8b6 on a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electric f826whnuftuc9q jd4 2 bield?

  A particle with a chargv7/:mgf-.c -s uauotwe of 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 electri j jqe (ch/1lpt.m)rf(c field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspend.1j(( pmlceqjhr t) f/ed?

  A foam ball of mass 0.150 g carru(v8rpo4e(7 (geygj eies a charge of -2.00 nC. The ball is placed inside a unv7 (e((oey8 j rpeggu4iform 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 +2sr.idzt 1j l l)ty:u++.0 mC. What is the magnitude ol+zrt)d1 u: .+iyslj tf the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrie dr2r euid;a+5qh n:h+ji d41 bjro..w;azug8s a charge of 3.0 mC. What is the electric field 6.0 cm from the cente a:d.wr+nu u r; jri.d; +h1h2dob5azij84qg er of the sphere?