State the law of conservation of electric l, u3pjylhp/;wwz k;0 charge.

  Is it possible for two negative charges to attracyn+oujm /d(3a t each other?

  Is it possible for a positive and a negative charge to attractwf2o0(x m ,pde each other?

  A glass rod is rubbed wit;)7xam:w.43 d v+x9brm erqta vt5othn2nmq.h a piece of silk. During the process the glass rod acquires a positive charge anda)haqtvr2e7 v5qrm+ t9o b4w.tn3m.d;xn mx: the silk

  A proton carries a

  The model of the atom shows ako;,c/ c7 g5z0 pimqyu

  A neutral atom alwaysguj-;*yr)kq rg 1bz 9iyvccwj8/0c8s has

  An atom has more electrons than mbvu97n)5aq0yyzf* dprotons. The atom is

  Materials in which the electrons are bound very tightly*avb a ,xqo eq(+b7z.x to the nuclei are referrevo .xabe(xb+ a7q*q,zd to as

  Materials in which the electrons +n92p qfchi8uzb v/ 3ss,j3vrpb1 4jpde4zj: are bound very loosely to the nuclei and can move about freely within the materzd,ppb2z :v94s+1eb/u 3ci4 nv 8jqrp sjf3jhial are referred to as

  A negatively charged rod ismbgma4/th6(jtcv/j7yc - w6 l brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged /gv a 6m4c (tjb/6h tmjcy-w7lrod will be charged

  Sphere A carries a net positive chargcw:*hvmy :99:c uflcs e, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is brim:* cc9lcyf:9vs w u:hefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargefm5qkb)hi9 d xk o2+i4sdkb 95d rod charge an electroscope positively?

  An originally neutral electroscope is briefly toucher3yyrk9wrg, b( vf4srm80kv,o1 t9n ad with a positively charged glass rod. The elecwgom8rya(n 9t94srrk1, ykrv ,3fbv 0troscope

  An originally neutral electroscope i82(who.ssd q ws grounded briefly while a positively charged glasww(so2dhs8 q .s rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches +gpm e7 .a0v uk-jho9na neutral electroscope, and the leaves separate. Then a negative object is brought near the electr-.pvkn+hm jgao 7u 90eoscope, but does not touch it. What happens to the leaves?

  A large negatively charged obji c 6yex9lnix;7v61dlect is placed on an insulated table. A neutral metallic ball rolls straight toward t9;1 e yl6idcilvn7xx6he 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 mrje rhw)guw1l 77o.s05p .it the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fitei1s8fz 4e5 urst charge is larger in magnitude than the second charge te4ze5si 1uf8.

  Sphere A carries a net charge and sphere B is neutral. They are pln vvldt8 7f;p5;dec4d aced near each other on a45p;nevv l87c ;ftdddn insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects adu))v ck-)n9dq(q wre ttract each other with a certain force. If the charges on both objeqnr-kecd()w9) )q u vdcts are doubled with no change in separation, the force between them

  Two charges are separated vlt34cqdna4:by a distance d and exert mutual attractive forces of F on each other. If the charges are separatea v44d:t3 qlncd by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a for69pwg:1r t 9bnz)g(e6 zwqvoq ce F. What happens to the force between them io6p n 1g :v)wwtq9q9rbz6ze (gf 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 separat5bn;zeveq g2+ed by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first ele; 2vnbz qgee+5ctron?

  An electron and a proton are separated by a distance of 1.0 m. What happe-8i roa, jr6onns to tn r ira,oo86j-he magnitude 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 a distsu:c3r ) x:med jm/kg*ance of 1.0 m. What happens to th3 s*ejxgu :)mmk :c/rde size of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a s z1ew/uje vx7(quare. When a second point charge of -Q is placed at one of/vxee1 z7(j uw 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 center of the square?

  A point charge of +Q is placed at the centroid of an equilateral tr l*4p -dk;ag2 1aztnbp)z.kw:n*e xbl iangle. 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 magnitudeg ;-n2zp pkea nl wlbdab4t* 1)xk*z:. 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 0h6irb+/b ucqvector?

  At twice the distance from a point charge, the strength of the electricxc+cdfk (- +vx field

  Is it possible to have a zero electric field value between a negative l:y,+fpwh+j7l4xz ac uqi6) sand positive charge along the line joining the two charg,zj7s w hqfl+x) :46culiap+y es?

  Is it possible to have a zero electric field value between two positive c4(zzg(5grx rql ep 0v+harges along the line joinr0(r zz 4evpq+gx5g(l ing the two charges?

  Electric field lines n t r.ctcl:ak/+ear psitive point charges

  The electric field sho bv0(xaoae-/*gy1x jlihs 17jwn

  Can electric field lines intersect5)r(s u;qu xfilaa*7n in free space?

  A solid block of metal in electrostatic equilib(8 umrnm gzplpes-z c)); x598k q6gszrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's intp s(rgm nkzc ; e)z885gq9l)ms-pz6 xuerior.

  If a solid metal sphere and ajj1; sk-a ,6faer ;cwd hollow metal sphere of equal diameters are each given the same charge, the electr rw 6d1jj ka;a;f,ecs-ic field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tablemneap j9-cz+ig-i( 5*k i*lhl in a region where a uniform electric field is directed straigia--lz(ik *+hmcgp*jle i 5n9ht upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostaticqkn;pzq +1tzp(dik 8 .hi2ol 4te) 0nn equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metay .*b(wlpjl. zllic sphere that is grounded. As compared to the case without the hollow sphere, the electric field zb.l(l* w yp.jat a point directly above the hollow sphere has

State three properties of condumjx,u 6mlsh zizl,56 ;ctors in static equilibrium.

State Gauss's law.

  The charge carried by one el7fm 1nj )wrhf.ectron 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 .d 9rahxbjt- ww6 ga7.many more protons than electrons does g tb9.6j7.wx-ardwha this piece of plastic have?

  What is the charge on 1 kg of p5jlfs) nff)m6 rotons?

  An atomic nucleus has a chargeskt00)v l3hui 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 valq5 4upm zwfe6u91.gxbcwp.n8 ues of 2.0 and -4.0 mC, respectively. What is the magnitud69mu zxcp1.f5g qbp4 wnwe 8u.e of the electric force between them?

  A 1.0-C charge is 15 pppb0zg4o7*i) nt 7bfm from a second charge, and the force between them is 1.0 N. What is the magnitude of the 7pbgp7nob0*izp4 )tfsecond charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theyxhj0kzc frk6/v zqlq+o-e2*1?

  The force between a ;i. lgnaf+s8o$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expes,- 3ult853 y2jt h*c vndvydqrience a 1.0-N force. If they are moved to a nev,ysqln8jdhdc3y 5tu tv2*3 -w separation of 8.0 cm, what is the electric force between them?

  Three identical point chay 9 wa2skll9*zrges 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 thel9szl w 2*yak9 charge at the origin?

  Three point charges are placed on the x-axis. wa-lgv v 5+e 6/b9ulux 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 directionvgb5 -6wa/+l l x9uevu of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following p;yc3xr opfu1-ositions: 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.xuf-po;ry1 3 c What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed 2b gxf:bkn 97 s0x7 ox1 6boy.qjg3wfiat the 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 tn k1qbxf7oo:xwyf70. 3jixg 2 6bs9gb he 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 is8u 9/ vpyw7 w75mxhs 6qdx*xdz at (0, 0). What is the magnitude of the net forc 5 w6s798hmpwdquxx7/xd v*y ze on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1d p *aq)a )q; idk31u2qe4snm-y g-bnf.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chargen qq1bu ;g2*apkm-3 a4nide qd)fy-s )?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral tgou4jv1zet( kk: mzc+(/naxx96 2tu ariangle which measures 30 cm on a side. What is the magnitude of thek( uvznco/4t9ta x2jg 1(xk:ae+mz u 6 electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separa+r k3ge7sihcamn;- s3ted by 3.0 m. At what point, on a line between the two ch ;sm +-3hnkgacsir73 earges, 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 chau;*j4nn4mo k prge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net fo pu;4o m*njk4nrce on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where p:z i-kuo)o gh)4m/4+,nikz -h1fhe r mv n;bvcan a third positive charge +q be placed so that thkr)h4z4m+/ v;i,mv n hzopk hbn)uf :i- e1-goe force on it is zero?

  A copper penny has a massr1geeeikm 1onel( 4-, lix/q( 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 gravityh8 58i8g ckl(0iamt om by the attraction of a fixed pr5h8o8 08tcm(gkailmioton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduc(8s vj6keot e9ting threads which are 30 cm long. Both are given identical charges, and the electrostatic rep6 (v9sejk ote8ulsion 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 o s8;piz yki() ppa6p9nf +40e. What is the magnitude of the electric field at a distance of 1.0 m frp89iip(y p sa k)6nz;pom the nucleus?

  What are the magnitude and direction of the electric field at a distap.qk .xmm j :y7ov )d;9ljjg2ynce of 1.50 jjq y) d. :;kp.ml2jgmoxy9 7vm from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is th9u4ch2n xsub7 ww.z(ze magnitude of the electric field at the loh(us wu2bx974 nz.wzccation of the test charge?

  A 5.0-C charge is 10 m fromla j5(fz41(*m dgbl:5nijcr f w44wgl a small test charge. What is the direction of the elect famw ifc5l4 l5g *nrbd4((zjg1w:l4jric field?

  A 5.0-C charge is 10 m from a smalvsi(wd b u* 7f*eps9u6l test charge. What is the magnitude of the force experienced b(ude9b spsf w76v*ui *y a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and ay*t51g cf6vk j-c vz(mre separated by a distance of 4.0 m. What is the electric fjk cz6g1tf5yvcv*( -mield at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mak3(mm6* d e bppx0kyl6rk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fiel* m3p kmbl e6kd0x6yp(d at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4uvf)2tk q:*ffne0kdu .a/ e8m.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the d8kt. 2ka:vem n)qf0*u /uffeelectric field zero?

  Two point charges of g ji9pe(*;li; jgjz c4+3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at t i j;;plz g*gc9jie4j(he point midway between them?

  Three 3.0 mC charges are at the three corners: e*c4d2 sh+ :hdfxjes of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fielj:d*e2: dcfhh 4xss +ed at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are p6b:q9z hg.vb3g3hc vlxz e2.nlaced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mCh e2.n9vbvgb.qc6ghx z 3z 3:l 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 a charge of 5.0 mC when it is placed)o*eg lwl + 0u6;p1pd a6srvrv in a uniform electric field. What is the magllv)1wpuev+6p * r oa 0sd;r6gnitude of this electric field?

  A particle with a charge of 4.0 mC 1xho7-(afwd5t y1 t qnhas 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 ayul.l )w2*;a n zvczn;n electric field of 6000 N/C pointing dyz v;.wu2zn*) ca;ln lownward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. yh6,spkq4g x ybzop+w6bu*2/ The ball is placed inside a uniform electric field, and is suspended against the f6up4,/xgkqyb +wo 2zh s b6*pyorce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charrv/i) x4(bpkn ge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfac/rn ( v4ik)bpxe?

  A metal sphere of radius 2.0 cm carries a charg6 oe.eete6, ulu6o w15z5wj p5bz yf;re of 3.0 mC. What is the electric field 6.0 cm ;be5ep 6 yflow 6 uu,e1j5 e6t5zr.wozfrom the center of the sphere?