State the law of consrzqqs8oe p3 2x6xcx) ( qi3e.servation of electric charge.

  Is it possible for two negative charges to attract each otx 2xx ydku5 :ps l.6(ebpjz/b.her?

  Is it possible for a positive and a negative cq ;(sl4 vnqymsa2 31rh5 eheb4harge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glas)d o15epruyo/e ;tk o7s rod acquires a positive charge and t/ ok1 e7rpoody;5t )euhe silk

  A proton carries a

  The model of the atom shows )nj cjgp: qu34w(.gkh a

  A neutral atom always h+dtf o1/gdlh )as

  An atom has more electrons than protons. The aw5(bir8 - vmzctom is

  Materials in which the electrons are bound very ti-gkilx4 p7u42ny7 hv :ytt q;kghtly to the nuclei are referred-x ;yity4:thnpk 7 24qg lvku7 to as

  Materials in which the electrons are bound very loosely teo*bvy,7 osy* cl s/ fx7xq-b4o the nuclei and can mo-*vc x4b *x y7sq7bfeoyl,/ osve about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar(z,(x ky5 na nrkh.3lq. The end of the metal bar farthest from the charged rod will ba(3 r5hz,.kx(yknlqn e charged

  Sphere A carries a net positive charge, and sphere B is neh- 3 wdk3 vdwrza5jg16utral. They are placed near each other on an insulated table. Sphere B is briefly touched wk-633 1j rhawd v5dwgzith a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrosh;mzf1l:bvhfw .;c ;z cope positively?

  An originally neutral electroscope is briefly touched with a posit195vg j*ij.zx+n xo 3cp06xg; s rwfopively charged glass rod. The electrr9 ;i. w3j1*p+6xsox f5ozpgn0jgc vx oscope

  An originally neutral electroscope is g+ 1xkrd flh9x ovwcr d,hv026lw,ij(b2q*vp0 rounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electrx,i hk2f2rjlcp, (x *0dvw0v9b +lwoh q r6dv1oscope

  A positive object touches a neutral electroscope, and dd **fp+ aol)n8 d4xqvthe leaves separate. Then a negative object is brought near the electroscope, but does not toucpfdd4lq 8x*)a *dn vo+h it. What happens to the leaves?

  A large negatively charged object is placed on an in9n:mpb 9yu) m.ivg3n4 gfdm s5sulated table. A neutral metallic ball ro:p4ynmmbs vn )d.ufmi g93 5g9lls 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 ball?

  Charge is

  What are the units of the Coulomb conste9*tw)0+ph mxtmtb6d ant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. x;c lzm4hs9rp j((4rs The first charge is larger in magnitude j( h4;9p4 rmr(xlczssthan the second charge.

  Sphere A carries a netb uyd(d .ee 58tpi.ii4 charge and sphere B is neutral. They are placed near each other on an insulated tabldpi5bee(i.8u i 4dy t.e. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the cha:6 1nvvpj ks5jrges on both objects are doubled with no change in separation, the force bej 1knvspj6:v5tween them

  Two charges are separated by a dis +1o .m0jqkyg9.nhqjutance d and exert mutual attractive forces of F on each other. If to. kju9mg 1qnh0 +jq.yhe charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other withc14t*ntdek7 n0mcu q1 a force F. What happens to the force between them if one cha*e q101kntncmudc 47t rge 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 m. What happens to aprnz.ww4oxc5l0 w47the magnitude of the force on the proton if a second electron is placed next to the first elec445wnwp.wco zxra7l 0tron?

  An electron and a proton are separated by a distance of 1.0 m. What happen aoea33e 8dr5houpw,4 j4xop6 s to the magnitude of the force on the first e,p4eu 38a o4od3ewpra6x oj5hlectron if a second electron is placed next to the proton?

  An electron and a proton are,xo;j)vl5d3:mkmrlg a j; g9 0h)mivi separated by a distance of 1.0 m. What happens to the size of the force on t or;:dm)hkillimg3jja ,905vxg);mv he proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q ivm53cb pf ;*6phh 6 afqod/l8is 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 o3la/8o hv5 pmdqf6 bhc6;pf*if -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 e; 7j* e7jnzw uflt/ow hw4*h-dquilateral 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. What is the magnitude of the force that acts on the center charge due to a third charge of +Q place- edn/hjfhwt* l7jo7*;uz 4wwd at one of the other vertices?

  Which of the following is not a ve(uzv5jz3bm8( 8 gr/fmrg:t pgctor?

  At twice the distance from a point charge, the strength of the eg8ou5 ;1jbsk electric field

  Is it possible to have a zero electric field valu91sube wai il,85p y6je between a negative and positive charge along the 8p9i1bijwe y5usl6 a,line joining the two charges?

  Is it possible to have a zero electric field value between two positlr0p*wv :t ;,gjitn.t ive charges alolvt g0tj itnw.: *;p,rng the line joining the two charges?

  Electric field lines near psitive point chargf1/(yfsl i8b)zx6 qnles

  The electric field shown bkz0 d7n4n6knxi-zw 7

  Can electric field l(s6lgc)it f 2eines intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed inemaddf7dn1 0*+xg*s/jyl 4 xx a uniform electric field. Give a statement concerning the electric field in thjg ddx1 an*/xsl+4fey*d0m 7x e block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are ebdy 9gyzg: nmsqx/49,ach given the same charge, the electric field (E) midway between the /g my9s:d,4z9 xygnbq center and the surface is

  A cubic block of aluminum rests on a 0) esxx m//qktwooden table in a region where a uniform electric field is directed straight upward. What can be said conxse /k 0tm/qx)cerning the charge on the block's top surface?

  If a conductor is in electrostatic equili,oupg.2cb z(o*vad /t brium near an electric charge

  A positive point charge is enclom c mit-r(og*(sed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abi (mortm- c*(gove the hollow sphere has

State three properties of conductors h /7u gyz.7srpin static equilibrium.

State Gauss's law.

  The charge carried by one elejczkg16c 5 :4f7ipb obctron 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 ha; ez:p+nbsx3js a net charge of +2.00 mC. How many more protons than electrons does thi zjebnx 3sp+:;s piece of plastic have?

  What is the charge on 1 kg of plhizlae7jtsc9k58): rotons?

  An atomic nucleus has a chargp2ch 87wlh8k f 0xz0,kb zh)mre 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 valum//g -jgb+n pies of 2.0 and -4.0 mC, respectively. What is the magnigb/p+- gnjmi/ tude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them ic9 sblggz2 3wju30u jw5+pea2s 1.0 N. What is the magnitude of tw us g0 lcbzwg22j3eu+95j3aphe second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How 9x y +s)1hotlzfar apart are they?

  The force between a 7 f7vc;uoi9i7,h bpkg$30 \; mC$ 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 1.0-N force. If they b w9ih), /bba.7x cirmc8fn 5kare moved to a new separation of 8.iibx)rk9c8bb fa,./7nw c 5mh 0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The fir4 lw wo6usd+ 34ujo-bhst charge is at the origin, the second to the right at x = 50 cm, and the jl4ubsu6+-4od3who w third is 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 placed on the x-q,xm/(p se biigvx3:z ;l-n.paxis. 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 cm mark. What are the magnitude x,.pp zv ;qxeln:b /i 3-i(gmsand direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the followgf)mwv/yrsiq(v) -8n+( wr coing 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 +-w)g8 (o qirfrvm snw (y/vc)the 3.00-mC charge?

  A point charge of +Q is placed at l7 g2jpitl,;i3gu x, rthe center of 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 charge at the center. What is the magnitude of the force that acts on the center chargejiux ;g,lig7,3p2 ltr 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); Qn1l iqgnrblmn24.ae cd *;:(x3 = 5.0 nC is at (0, 0). Whaterq *mnlla 1:2c n;nb(.g4xd i 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 n63.yla 2waxbaC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the dia6 w.l3 a2yabxrection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed + iwd h/sueqnq/)h38+mg : t ztjlla*)at the vertices of an equilateral triangle which measures 30 cm on a side. What is +itqehjg/ t):u3/asm +*lqn)l w8zhd the 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 m. At what poglmh0- l,cns, int, on a line between the two charges, would it be possible to place a charge of -Q such that t lhn mls,g,0-che 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. W 2vkr bzn;-k g)kw7xh+here on the x-axis can a third charge be placed so the net fzb hrn;wgkk2 +-x 7)kvorce on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. sed u)fe jhumzy4ots,p 26215Where can a third positive charge +q be pdz)24 ,meh1su u 5toj6 fe2ysplaced so that the force on it is zero?

  A copper penny has a mk6coaa h,.(djsii vv2 /;l:ruass 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 gravixby-4o7vf(h4avg i2 tty by the attraction of a fixed proton some dista gvt-2 4xfoa4ivbh7(ynce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncondueoe k q; -7naxv 0a9c8da9yjv)ga4 tw)cting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the-ga w9a q) vac )04d;joneea8vk t9xy7 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 mon83wv;lwfm.l,4- q)y an zkof the electric field at a distance oklw) nv3.w,zm8f lq4yn ;mo-a f 1.0 m from the nucleus?

  What are the magnitude and direction of tt,rpgr ,p :(xffs lw91he electric field at a distance of 1.50 m from a 50.0-nC charp 1xp9rfgs:,tflw r(,ge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thelq2/brt( i jx-4 ;wmlp electtqmi-/lr l w(b2pjx ;4ric field at the location of the test charge?

  A 5.0-C charge is 10 m from a s yxxs lrf22/: y+)t xuwf2wur/mall test charge. What is the direction of the electric ffuxw/22t/xrry: w2s)l yf+xu ield?

  A 5.0-C charge is 10 m from a small test cha+, xlyr v d n1ghh(:wr3v++sfvrge. What is the magnitude of the force experienced by a 1.0 nC charge placed at thev13d+ygr,(x+vs + fnh:r hlwv location of the test charge?

  Two point charges each have a value of 3.0 C and are se( +ihas..ipo:9n ytr4j vy4ygparated by a distance of 4.0 m. What i4 sgpa io.vtyj .9iyr:(+4y nhs the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at6ss/:j0ylvf z+m-6piq 7 hwt kd:-sr s the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field atf0ms+rkp6i-w7/ : svsjd-lh zsqt:6y the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cml6g vd9im p+ysq h47/p 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 chargeh yid7 qppgsl4/m+6v 9s is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 hrr:;jrok br q2oe::7m. What is thej:7 hrbror :2q :r;oek magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a 7k7isy5n9m o esquare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric f5n9 ke 7oiysm7ield at the center of the square.

  Consider a square which is 1.0 m o-tyoyv66 e .7q c2phoulzq 1z2n a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); c h.u v e6-qzz17o26ot p2yqly +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 a6jfoq.-i rfx4s p.x0j charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this epfjx-ox.6r s4 f q0ij.lectric field?

  A particle with a charge of 4.0 mC has a masq-(cekird*ed1 h xz6fv(3mo2 (wnby5s 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 electric z8 pwj/bvdc t.0il)2s36oow9ws p,nefield of 6000 N/C pointing downward. What charge must be placed on the ball for it to 890ncwidvp s/2 pw)jb et6w3s,looz.be suspended?

  A foam ball of mass 0.15d o-n7ilqr wu/d1 0pc7 *r6vsi0 g carries a charge of -2.00 nC. The ball is placed inside a uniform elecr 7dnq0 /ipidru6v lws7c-1o *tric 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 +2.0 mC. What is the magnitu+anjoya g0dult 84+fqc /4x7ade of the electric tn0+8q4adaau/ 4fo+cjg7x lyfield 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries67xwx 0e0:wwiul,8hc k;i y uq a charge of 3.0 mC. What is the electric fiel 86hekwlcq iu;:ww7ixu0 0y,x d 6.0 cm from the center of the sphere?