State the law of conservation of ejk-bpkne2a:8.;* c jf6b emoylectric charge.

  Is it possible for two negativu g/3v0wgx iktwn:b,:e charges to attract each other?

  Is it possible for a positive and a negao62vw40nbbtfy) ut.q2qn . egr 0g7mxtive charge to attract each other?

  A glass rod is rubbed wija;0a 8orlz x6jtv beqf2*f4 6th a piece of silk. During the process the glass rod acquires a r 8efjaoqv6 fltj 2bx4z60* ;apositive charge and the silk

  A proton carries a

  The model of the atom shws/ 1 )qk mu-zb9)m tnyogg*1hows a

  A neutral atom alwaysxfral .vh7 t fr4e:*9t has

  An atom has more electrons than protons. The ac2kgqhw0 el 9/ido1 qe,k81w 3n)palctom is

  Materials in which the electrons are bound very tightly tyopbqa 3i994h c7(fado the nuclei are referred97a oiyqp9fdah( 43cb to as

  Materials in which the electrons are boundomy k2s q-+*wcpg*d ac5h5ws 3 very loosely to the nuclei and can move about freely withinyca+c wp3 s*gmh5q o5k wsd*2- the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. Tha6z m rvkc0gr3 /(dn7:4g5uax /fl rsie end of the metal bar farthest from the:6(vf0 x3/zsma ua rnirg5 ldkg4/7 rc charged rod will be charged

  Sphere A carries a net positive charge, and :dp8;sx.m;sg::zzkn ntdc j. 0wfg2psphere B is neutral. They are placed near each other on an insulated table. Sx;p0t 8z.d:nsz2d cg m gf; s:wjk.:npphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelysk -w.r*w lg,7 (hryrh?

  An originally neutral electroscope is briefly ts5led1 q 1w jna()e12n n:hclyouched with a positively charged glad15)wnne a(nhyq: lj2e 11slcss rod. The electroscope

  An originally neutral electroscope is grounded briefly whl:b:, jlrx *r p7yt583jmwqk vile a positively charged glass rod is held near it. After the glass rod is removed, the el57 t:jl3q k*xjrbr:,py 8 vmlwectroscope

  A positive object touches a neutral reqcp)j:7h0 x ku4n0pelectroscope, and the leaves separate. Then a negative objecq0kjn) 0x4 pph7c re:ut is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insu1 b+w(dz/tog2ak0 imelated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. 2(t/o0a i+e bd1gwkzm 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 constantkmms j7 .nn:84j *a6q9q tydjdxp7v0q $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The oaqj9t- cq p:qc iwy,0s*y3 e0first charge is larger in magnitude tj,0s-qq c*eoy3a tq: c9i wpy0han the second charge.

  Sphere A carries a nk60;wrc;h vv fet charge and sphere B is neutral. They are placed near eacwrvfk; v 0h6c;h other on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects azhzn f ( x(ki3+p gh09tw2xi9yttract each other with a certain force. If the charges on bothiw(g0phni(3 x9+2z hyk 9f ztx objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractiv aybz+k-l;t y-e forces of F on each other. If the charges are s-ty-l+ za; bykeparated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othoui ;q5hr9ar4c (+pt her with a force 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 is reduced to onrp qthor9 (;ciu+ ha54e-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distancek/8k /j4:hl v ndh)pbu8 t.eje of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is pl4 t)8 / 8uhklj:jdek.en/v hpbaced next to the first electron?

  An electron and a pro wlw0k:9 bm-3ir(cvxtton are separated by a distance of 1.0 m. What happens to the ml0-itbwr:(k 3x9 wm vcagnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a protnx t3/;s4 rmadon are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the elxrd/ m ;4satn3ectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secondsp36 t)nvfbq* 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 is the tn)s* bv63q fpmagnitude 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 ehy skhx iyc m1 )ji h8:hvx6a6ru635-uquilateral 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 fo5 66rxvu:ukc i3 i-6)hy8xh haym js1hrce 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 vectorqbir)r k osdzs q+ 0j3g*b)p5/n)jg- f 5lt2te?

  At twice the distance from a point charge, the strength of the electp3gj z; cle5-xi**osy ric field

  Is it possible to have a zero electric field value 2jri-h,-lb *r9wq cme between a negative and positive charge al 2em c -h,*iq9wjbrl-rong the line joining the two charges?

  Is it possible to have a zero ext-(u8nc1 hz,wxl c 7blectric field value between two positive charges along the line joining theuw8ln(x-c, h1ztxcb7 two charges?

  Electric field lines near psitive point charg4lp4/ dvplj6q es

  The electric field spaos;9t, .v*e xzw*oq+p t g6c o3dd.ohown

  Can electric field lines intersect in fr9c/ha j ln2c/eq k: oi51nbv n5vcs;b/tbv+ :dee space?

  A solid block of metal in electrostatic equilibriu9501lzr-shiz5rx :l pt/ dldem is placed in a uniform electric field. Give a statement concerning the electric field in r-50 tz9 idl xrl1h/5:sld pzethe block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are e i::kt,mf*j2-wv muieach given the same charge, the electric field (E) midway between the e:*mm ijftuk-:w v2i,center and the surface is

  A cubic block of aluminum rbhrb(.:g ( vl -(jfuigests on a wooden table in a region where a uniform electric jrbih: b(gg.f(u -v(lfield is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic-/;ny;vvx ck z equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere 33hkv08 jm3oo b iax/vthat is grounded.m33aiv 8xo/ hovk0jb 3 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 conductors in static equqv2k9t *h p7lqb)bx/r ilibrium.

State Gauss's law.

  The charge carried by one electr7jix4oh e 2ba+air /5kz; tx(4m.jo kcon 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 +2.0ei f1) .ywtcsnps()6y 0 mC. How many more protons than electrons does this piece of plasye 1(6tn).fiwcps)s ytic have?

  What is the charge on 1 kg of m zc nmyl62m3t lyy558we+jn-protons?

  An atomic nucleus has ajhg/ ;kbv6 n:z charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sepaib-oe *)pd8p nv8qtt i +gfb8(rated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude(v*f8 - e8ib gnodb+t qit8)pp of the electric force between them?

  A 1.0-C charge is 15 m frompl.tn, 1rf kd 3ye8;hr k//ncx a second charge, and the force between them is 1.0 N. What is the magtepfynk;.hl nr/r1dc/k3 8x , nitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How w58p,j:/dl gs+ *a p 6hwtmfpn-ni+opfar apart are they?

  The force between a odb,v tt:oi- 3$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ex+x de6:y2+ kdig*zt h/r3hpheperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betwe3dpeh+ t+eki*2z dghrh y x6:/en them?

  Three identical point charges of 2.0 mC are plnuu4 pwm 58l5t;4c jay.ru1fg4 tu6mgaced on the x-axis. The first charge isr6 mw5j upg5anc4y fl;g1t.8 umut4u4 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 plac z3a+ j3:jksj4rng4 2b-gq .hrxpm g(ted on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cmzgg tb + 3apr-mx4.jn:q j3j4h(rs2gk, and +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 are located at tztkq*k)eb:qoi+kb 5 2b1v5e q he following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3e5tq : *ekzbi21qbkb v o+)qk5 = -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 2z6sbal,gf /f placed at 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 cha6 ,/fsfabg 2zlrge 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 a1 3spfvrp6 xf -)tdrm0t (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC f1r )rfx3s6tdp0mv p-charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 =q2 b -rn 5aegz;g;z. +vdqr.qg 5.0 nC is at (0, 0). What is the directi;d. rg-qg gab+5n2z.qze q;vron of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at r0uexuvr1pm +a;/gsl v)7-a3w bvo2u the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the p e7ag;u/32)bw1 o v+ravvl 0umurxs-charges?

  Consider point charges of +Q and +0vf :qd rrj2b-4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to placejrq:-bv0fr d 2 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 atu*p4s- 6lfw,btg wsl6 x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is z4t6 lfwsw lpb*u,6sg-ero?

  Charge +2q is placed at the origin and charge -q is plex e;bn,;h fl8aced at x = 2a. Where can a third positive charge +q be placed so that the force on it is zb8nxlefe ,;h;ero?

  A copper penny has a mass of 3.0 g. A totarrqq/; p7f(v hbs- l36vean,,o gw y6fl 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 thh34rekhc921ks+o2.qu fnp jt e attraction of a fixed proton some distance above ishor jc1qt22 he4ku3 9.f kpn+t. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common poijk; edio1xni*d n6 0(ah1*e jjnt by nonconducting threads which are 30 cm long. Both are given identical charges, and the el ;(*j*6hne ixijoe 01ndkajd1 ectrostatic 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. What is the magnitude of the elg/ x06,f 8 ;qz/dgrd1k zbswwlectric field at a distance of 1z gl0zgw8kbqfsd;/x/ 1 ,d6rw.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of 1.t qoq w qxg9)voh+.65p50 m frqx5v h9tqq)owgo+ .6 pom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a spt*uy)+ rzzpf;ji9g4 mall test charge. What is the magnitude of the electric field at the location of ttuz)+yf;*p r ig4jz9 phe test charge?

  A 5.0-C charge is 10 m from a small test charge. vz2 n-//*j0h qtl kiro What is the direction of the electric field?q*v/zki lhorn /-tj20

  A 5.0-C charge is 10 m from 79.f5w l qllqn1hy nm1a small test charge. What is the magnitude of the force experi57 q nqh 1.nylml1flw9enced 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 and are separated b1* qwyhq.;hr;yrmov*t. /v4c d1ogn ay a distance of 4mg4.v;naydr o crq 1v; . 1*wh/qytoh*.0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is pbj r7 wa)kktpi:fi8++laced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What isia kwr:k+8j)pb 7it+ f the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stg9;- pt 5ff:* 7 ctfjxzh6ymosick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a lit;s9tf fjof-y*mpgc :6h7 xz5ne 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 x = evz/9 .lo xpj00.20 m. What is the magnitude of the electric field at thpvj/9zoxl. e0e point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sis5 9c7gfe3w3m xz hpj/de 0.50 m. The last corner is occupied by a -3.0 mC charge. Fin7f 5xeszwm33pcjhg/ 9d the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chab9d sd-jw+9- x(d kb82 xqpqsdrges are placed at the 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 magnitude of the electric field at the square's cenkb +w- 9pqd8-dbj dx9s2xds( qter?

  A force of 10 N acts on a charge o1aj*; ow )e-yyzd 2tbof 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this elyod 1 -at; ez)y2*wojbectric field?

  A particle with a cha a,9mjf 5elnj0rge 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 electric field of 6000 N/Cle- bo2mk(5k hmt l8qv29xt -w pointing downward. What charge must be placed on the ball -8tlqtvk2 mbx5lk-ow2h( me9 for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is c,magfk xnqo)+ z+( y,w4o, hcaf1a2m placed inside a uniform electric field, and is suspended against the force of gravity. Whaoz gmcfn2(, 4,+,)c1k mofxaa+wahq yt are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm cax6vd- go2yn 7crries a charge of +2.0 mC. What is the magnitude of the exg 7d 6c2oyvn-lectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 jmo1 pk)rg vq( wpu26m7b9-4gd+ wlxrcm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center ox+wvjrmg 7) p6pr 9bu o2w(4dgm1qlk-f the sphere?