State the law of conservation of6 px*porau -q: electric charge.

  Is it possible for two negative charge-x1dzh7vi- pd s to attract each other?

  Is it possible for a positivdiol we+.,p + sj+-zaoda- x.ye and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gexh0w, .:a:ohnz,1 -z gdh iujlass rod acquires a positive char1.h z -godwh: ,hjxu0zei na,:ge and the silk

  A proton carries a

  The model of the atom vm)sju)3o wmn3u v7*lshows a

  A neutral atom always 0)8fgt 0mkapn has

  An atom has more electrons than protons. The at2w+-x98dzp2rb uyjc- m(ib6 qsfux7zom is

  Materials in which the elect g2qb)wqi1/ebrons are bound very tightly to the nuclei are referr1qqw )2/ begibed to as

  Materials in which the electrons are bound very loosely to the nuclei and can hl r kh7muz p80e2vm 6elk;h)/move about freely within the materia2lme )67he8mzk l kh/hv0p;ru l are referred to as

  A negatively charged rod is broughtj2zx,vw7 +pxz,(ilj q near one end of an uncharged metal bar. The end of the x2,z(vw jli xp7,j +zqmetal bar farthest from the charged rod will be charged

  Sphere A carries a nex sexw :l f9m6) :rt/50yfhsrut positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere r6teu) ms5hxy:rflfx90 :s/w B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charg 8vjgqly k7q.4e an electroscope positively?

  An originally neutraeap p+x1ju8u* l electroscope is briefly touched with a positively charged glass rod. T8x*p ejpu+u1a he electroscope

  An originally neutral electroscope is g, rzv60v rvuj twkh9)0rounded briefly while a positively charged glass rod is held near it. Afhjwv v6zu)09kvt,r 0 rter the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, :, a8xjhv8hn8-jt.f vd3jlce and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the le, -8 jv v8:3jhx cahtjf8ned.laves?

  A large negatively charged object is placed on an insulated table. A neutrvq cgz b)san0irlnmmo2 3( v w87ru50(al 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 touc0nv i)g(rsmr3c75lou8q wa0b zvm 2n (h the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb co7 nl;v;d7mu/+ly cln3w-waug nstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The xrq+nz .+ubp) first charge is larger in magnitude than the second charge. rp+u.)x bznq+

  Sphere A carries a net charge and sphere B is nq88i( l9.f sunutej*xeutral. They are placed near each other on an insulated table. Which statement best describes the electrostaticijl e8 *xu.9n t8su(fq force between them?

  Two charged objects arrbc. j z1+7ak :fk*7seqd8 g3c0jykdttract each other with a certain force. If the charges on both objects are doubled with no change+ac:kr dqs.jg yk3dbe 07f1jc78*r kz in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractiv*i0qii l y.r-v7t*vjve forces of F on eachr7 .q*0vtv*ilyviij - other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with p.pzymg7n:2z /ufp(aa force F. What happens to the force between them if one charge is doupn/mpyf:7 az2gu (zp.bled, 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. nm(miwlu1 e3cdb9 x ez)a19d7;pr(a m What happens to the magnitude of d17; aruemd9m39ea)(p n (lc1mbwxz ithe force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are s9-v4 px(fnn 0 nsetu*neparated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a n p-unnsxt *0e(v9n4f second electron is placed next to the proton?

  An electron and a proton are separated by a distance ot9e:uhc o,/cpn hb* o20cwus; f 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the pr/w2 h en,u*ouhsccp 0o; t:9bcoton?

  A point charge of +Q is placed at the center of a square. W-iuxb - jw*q3da0t8k ehen 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 pq 8 ta*-dbjk x03ewu-ilaced 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 ofclxr w3ot :w-kk)i -8r,,pcly an equilateral 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 oc3c,o- ,w l wilpy-k8x:)rtkr f +Q placed at one of the other vertices?

  Which of the followin qsdci 9pe1ki1+6q( oeg is not a vector?

  At twice the distance from a point charge, the strengty c4 csowo* o8v;c x4pkr9.1irh of the electric field

  Is it possible to have a zero electric field val8,5ngobh 3 feque between a negative and positive charge along the line joining the two 3f5q8e hbnog, charges?

  Is it possible to have a3y6n hg/anl. h zero electric field value between two positive charges along the line joininghh/6l n3ag n.y the two charges?

  Electric field lines near psitive point charsr;8jy k9tf)j2p k0fjges

  The electric field shown uqkz 7benp /5; 1i+bzw

  Can electric field lines intersect in fre/)((vctlpxh(8zgau7 v,y x d ce space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform ezr yi7(wz vx0(lectric fixzyvwi( (rz 07eld. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphe nf3of mchw2a0020tvpx ,qy+ure and a hollow metal sphere of equal diameters are each given the same charge, thv,un+3t pwh20f0 oqc2fmy xa0e electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden j(-m qidwv/kcbm2 k1a1-tre, table in a region where a uniform electric fiedwmke-ibr c 21 vt/a (,k1jqm-ld 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 elect5w ea3rtqk+(je:)zkzkr ).yaric charge

  A positive point charge is enclosed i(nwi2,s- ,wt1 (gyt2ayz 2gv t.nxzf wn a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sph2g.n xz ty,t2n1iwa 2f(-yt,(sgvzwwere has

State three properties xfr +yjto/-*l of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one efgzrfyqiq: zjj x,/wz 9cv)+3 2x/r/vlectron 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 prototka e90hnd06- fbrng1ns than electrons does this piece of pl -g9k0tbnranfde061h astic have?

  What is the charge on 1 kg ofx4;ao7fxya+g protons?

  An atomic nucleus has a charge ojbv6 huf1 fuo/y4,zazh(o t; /f $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 131 (ba ivh6 y umlgseyf7a0- ns..:xuwrlg- 8q.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric 3 1n8sa.waey(70l 6qsu.-lumg y:rb- hgx ivf force between them?

  A 1.0-C charge is 15 m from a si) x1me*mpwu b4yf1ah 62m(gpecond charge, and the force between them is 1.0 N. What is th*x62pafhmy m1( m p ib)1u4gewe magnitude of the second charge?

  Two 1.0-C charges have a force betweenc:c bi:hjcxb5n -a: -edbj5z*5 /ixyj them of 1.0 N. How far apart are they?

  The force between a h kk6zp.n/jbln ;w, q9$30 \; mC$ 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 forj* f4cwkp, v:ai0k77 olfz5nxce. If they are movv fnkj75kf0* i 4 wx,plcz:o7aed 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 +b2- 4xlo ;p*pfnisgp charge ip* +ogl4i -p;bsfnx 2ps 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 origin?

  Three point charges are placed on th rk7x 9*j6lowpbmh6:j e x-axis. 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 and direction ol 6jh9 pxj mow*7r:bk6f the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x =1ugoi8si51lz5lomm k;3d3c e 1.00 m; Q2 = 3.00 mC at 83z3mg 5e1l;o5 1 ilsmckduoi 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 qt-mtub .)sxujf:mb-w + 2fiz4y e7.tthe 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 ce:.zte uq7 ywxifjmt.umb-+tsb2 ) -4fnter 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 (x)-;s wxv.s hu0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the nesw .-u;hxvxs )t force on the 5.0 nC charge?

  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 at;yppnj1 k83pi+( yn ewx ;-rly (0, 0). wp3+kyy-yxj;; p lnn(r8p i e1 What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at t 8a7bsb*snve (he vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whican7b ( vbess*8h acts on any one of the charges?

  Consider point chargeskqduz4 jid sowh(mf9.r2.8 2w of +Q and +4Q, 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 electrostatic su.z284dwik(.2hq 9 dr jofw mforce acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is;oi8 oj trke1+ at x = 4.0 m. Where on the xkoj t81r oi;e+-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -qg9a)tkpt6d 1z 3;htrp is placed at x = 2a. Where can a third positive charge +q be place;1 tpa)hgkr3t p6d9 tzd so that the force on it is zero?

  A copper penny has a mass r( y -haait2j;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 gravity by the attractitpjvw t:oa :va;94e-s on of a fixed proton some distance above it. How far above st vj:w ;atop4 va9-:ethe electron is the proton?

  Two 0.20-g metal spheres are hung from a coy:2ldeml),zj,drmr.0/pk p ymmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until th l:m0/2pe,r lrd,y)mp zjk.yde angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40ewnz: qp.5a+x y r)ij.f. What is the magnitude of the electric field at a distanqp.:w. x5 y) ja+rzfnice of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fi*z-npyge-:7tf1 x aus eld at a distance of 1.50se1gt:x nf-a *u 7y-zp m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude pat3x7oa c-3 iof the ele c3- pita7x3aoctric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. p jf oin0feuxql : x93g)(k+t4What is the direction of the eln(xf9+p )kxi flgt:40eqo 3ujectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of th28x 2uacy2xtse force experienced by a 1.0 nC charge placed at the sc 82xyauxt22 location of the test charge?

  Two point charges each h r8in)c.p l*rw,1r/ywvq af8have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two )* rcql, r.n/ hwwif1yp88rv acharges?

  A 5.0-mC charge is placed at the 0 cm mark of akn9ajh4br0 :h meter stick and a -4.0 mC charge is placed at th: 9hbnk a40jrhe 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 -4yv d d-o61.7 td7 0pnrxna af-fla8us+.0 mC charge is placed at the 50 cm mark. At what pa-xrf -ddov l8n1tsp+.7a6 fu 70dny aoint on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and mbt ox 16+l4kux = 0.20 m. What is the magnitude 16tk lm+b4uox of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The lin 3ee,utsmzkzz( ;feio6 wa*o,4(c 3-fe*ns ast corner is occupied by a -3.0 mC charge. Find the electric field at the center of the sfk4zne 3cei(e6(e*o fit ss mz,oa-wu3zn,*;quare.

  Consider a square which is 1.0 m on a side. Charges are placed at the corneg ed0t9tpgn30c-/ vg ors of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1,tv 0e tggg/pc3n0o-d9 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 placcdsu : 1x4t9fred in a uniform electric field. What is the magn:t1xfduc9 rs 4itude of this electric field?

  A particle with a charge op vajk4 2hv)1,kimfz. f 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 gi bo+g2i8zpl: 2za-y:rque2x is placed in an electric field of 6000 N/C pointing downward. What charge must bezi-ai2+:2r: gpx zo y2 eb8luq placed on the ball for it to be suspended?

  A foam ball of mass qh6r9m 2fe .9yjqbh4 k0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against49q qhye.r m6f2b h9kj the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge gfk/urep-mrj5 vmpqp i028/ lq.y- ,vof +2.0 mC. What is the magnitude of the electric fieldf 2 plmvqvur/rj 8 .e,/q5--g kypp0mi 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of e0*aw dlnd54a 3.0 mC. What is the electric nwld04e d*5aa field 6.0 cm from the center of the sphere?