State the law of congu4 a/- sl2 ;pf jq*sqnwd:0skservation of electric charge.

  Is it possible for two negative charges to attractcw5b-/nm 1vf9zfb9( gl neh bn+xv0t: each other?

  Is it possible for a positive and a negative chargivc7 q;s1c ro)e to attract each other?

  A glass rod is rubbed with a 63s oj8s89 s/xyrys w/ah0h tnpiece of silk. During the process the glass rod acquires a positive charge and the y 3synh j8a8w ss /sx90tr/ho6silk

  A proton carries a

  The model of the atom showsl ule*)d t:uo 48cph2cm -zdvm9b24ck a

  A neutral atom always hamu6y8pjdl4 ,d+j 3uh6et85k dw5 ais ps

  An atom has more electrons than protonssky:a+yyv7 hac: -wmk2 hqj,5. The atom is

  Materials in which the electrons are bound very 6 .s59aj)mvo1mz(nrd u3glm ntightly to the nuclei are referred tons)g(v5u3mz n. a omrd1mjl9 6 as

  Materials in which the * asal4yw icdjo11ai+og wc37(nf7; welectrons are bound very loosely to the nuclei and can move about freely within the material are reoaa1i4w(;ojs * d37igcayl+1 nwwf7cferred to as

  A negatively charged rod is brought ne*m e/o3sl/*3b+gb gdt4hvz,vl us g(bar one end of an uncharged metal bar. The end of the metal bog*h*d ut/(bblss l43v/g3mezvb+ g,ar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sph9/ yeqliehyh-p(yj *9ere B is neutral. They are placed near each other on an insulated table. *hl ph9ey eqj9 y-i/(y Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chara-rco.t g/b4gi vx25d ge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chan mn1 8s ) jj2wlglz/7hew*kb.rged glass rod. The electroscopejklnjh wb zl7*gwn8se).2/m 1

  An originally neutral electroscope is gij sp5,iqp m3/rounded briefly while a positively charged glass rod is jip5/ i,3smpqheld near it. After the glass rod is removed, the electroscope

  A positive object touchesiv3 lb1f.v 0 n.svdz4kdhshh84)0 hbd a neutral electroscope, and the leaves separate. Then a negative object1h.l .s h4db kfbv0)ds3 h0vzdn 4h8iv is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on a-83j-s, ev aamybgja.03 ze ww wisd,9n insulated table. A neutral 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. . aewv,03wzw3-9 ga,j8b dsias -jmey 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 msp12o)kqr.nd0s r.z p,pauj 4z0:i r the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first u0keju3(g2 id3mn:4: cyaf h2 s pl+btcharge is larger in magnitude than th +3(d:n lu:t 3b4fih ejcpk2 ma2sg0uye second charge.

  Sphere A carries a net charge and sphere B is neutral. T+hsc obx4, q*they are placed near each other on an insulathqs+ 4o,*xc tbed table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If thj i9nf ve5feox28*0) pvyv;hc e charges on both objects are doubled with no change in separation, the force betonvj e825i p;f )x0e9vvhf y*cween them

  Two charges are separated by a distagwxj pp:y p+mqjj8p(ist-j; 21-)c6jrgi.qonce d and exert mutual attractive forces of Fq 8 p jr--g1wjpt2gioj(+p jpiys;)cj. :6qxm on each 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 a force F. d: qln:: 5g+m dve:ghg 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 tge:lmgq +d:h 5:ng:dvo one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a ditn+shpqv, w .8ut8o5cr1h ;ixstance of 1.0 m. What happens to the magnitude of the p5 xc hwsiq8,hn18r+ o.tuv;t force on the proton if a second electron is placed next to the first electron?

  An electron and a proton arxeln 4tqi ,)2plny u5humj8.k1bmc 4,e separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electronu1m5pm4,4li)elh ykcu.xnb 2 tn,8 qj is placed next to the proton?

  An electron and a proton are separ 814z3q a t-.ibny/btyoxlr6sated by a distance of 1.0 m. What happens to the size of the force on the proton if th il.bb zqasx/631tyyt84- rn oe electron is moved 0.50 m closer to the proton?

  A point charge of +Q .6 x wx8sjbj5zis 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 electrostaticsx.6zjxw5bj8 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 triangle. Whtky3o;w8(.jzyct5i yvw2f n9 en a second charge of +Q is placed at39 z2ovti(tj. yn5 fc;wyy k8w 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 io1nad23;vlv3vee8t xo: )z fus not a vector?

  At twice the distance from a point charge, the strength of es8z(a. arj 8ons*p9in 4fq7qthe electric field

  Is it possible to have a zero electric field value betwnst*1s. d oui pch4,5ueen a negative and positive charge along the lio 5shu1c d4.*nui ,tspne joining the two charges?

  Is it possible to have a zero electric field value between t6do-94 a4:t1 r t)ixoqbu cgaqwo positive charges along the line joining the tw)rag:1cxo69 4q t4- ui otqbdao charges?

  Electric field lines near ps6f +lgx)opx)s/e9kk z 6iqrr3 itive point charges

  The electric field shown h:a fdqh2:jyu ; dl)4bp5pb* noz0 +mb

  Can electric field lines interc gi-p) dc,px:6fnd z7sect in free space?

  A solid block of metal in electrostatic equilibrium is +vge (5mua*ebplaced in a uniform electrbevu*m5 a+ e(gic field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters ae8:/syd* 9mvqh*tk :o r1.assn) zsdsre each given the same charge, the electric field (E) midway between the center and the s za)v.r:oyhs /* mdt8de*qk:sn ss1 9surface is

  A cubic block of aluminum rests on a wood+ f:oq-hto9 -l -h zknhr85rt5b,eflj en table in a region where a uniform electric field is directed straight -o -h l:,et8l frz9j5forn 5b+-tqh hkupward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrib5-/x1nh zy * yikeg 2;+sajddum near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that xt j:uhto2aq1j ah.q6e hr3+ 9is grounded. As c2 hqo+r6u ae 9.3:q1hjjxhtt aompared 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 prf.t* ,7y onxequilibrium.

State Gauss's law.

  The charge carried by onezkwcf ,ra ; :hxbe)65x 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 xn b3 7a;d7yctelectrons does this pb nt3y7d7;xac iece of plastic have?

  What is the charge on 1 kr2 a5aciyw 0*eg of protons?

  An atomic nucleus has a charge lt4q;r klxqpd) 6t *-h/q4kjxof $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by u/7x qx gti29y2s ser71.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them?792e r sqyigxusx27t/

  A 1.0-C charge is 15 m from a second charge, and the forcbc7:td f9 fe-9rt7iv de between them is 1.0 N. What is the magnc t97-v7dd it9fr:befitude of the second charge?

  Two 1.0-C charges have a for .enn 9*(nregcce between them of 1.0 N. How far apart are they?

  The force between a ed .non2mva,3chd l2 /$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 ccqctt170y*-jyae/ cb3is.b cm apart, experience a 1.0-N force. If they are mo1c sa07 ci/byc-jeb3qtt*c .yved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are p;lg-qmi/,3a gg +wrfylaced on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the +-iyl 3agg m/r;fqwg,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-axjz0 fadpnp c 6//lyam 4xjqr;fj-:t)1is. A charge of +2.0 mC is placed at the xzpq4dfyl /apj1rc m;):6jj-f 0a/ntorigin, -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 of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the follow;d-qxj/ ) ugbxing positions: Q1 = 2.00 mC at x = 1.0u/ dxjq;-x )bg0 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 the 3.00-mC charge?

  A point charge of +Q is placed at the center os,xuj yh9i/a2/ nkt /kf 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 charge if a third charge of -Q iss /nai ,2yxh9/kjk/tu placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 =ti 00p4c p*i1 .(qllayib/*r8hqn jtl -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is th(/i4yiq1chpia0 .jt plq*0r8l bnt * le magnitude of the net 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 = 5.1vn 8j hxlpmdi3o(87 ht aftol6e,8 9a0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chargexilo86taj(h eht317pf ma8 9nvdo, l 8?

  Three identical charges of 3.0 mC are placed at the vertices of an equjna hw:0v5u9 filateral triangle which measures 30 cm on an0:ah9uv5w j f side. What is 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 f-dkab:sw.3l what point, on a line between the two charges, would it be possibla-:w dfsbkl.3e 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. b jyf shb-4nt t;jv w w7ratja;+v.(n*gd81c5Where on the x-axis can a third charge be placed so the net force on it isdvtw1vr;b f - t5tj; bn+ajc* 8n.jgh 74awy(s zero?

  Charge +2q is placed at the origin ab ayn**kvkcbtg79l *; nd charge -q is placed at x = 2a. Where can a third positive charge +q be placed so thal k9c;yt*n7vgb* a b*kt the force on it is zero?

  A copper penny has a mass ofwmcw-m/;f 98hj9s xy*ew 1oui 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 upc,qfah)cwt)tqn)m7 03/ o,i6qms gco against the force of gravity by the attraction of a fixed proton some dimo)fan)cs,/)mio0qt tw gq 6,c37h qcstance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by ns/bdjr6v 4m1uv6n y .gonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion mrnv6vsu.46 gd j/yb1 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 magnitudeh .go ug2r ah i.bihh2xyus8y* 4z*n52 of the electric field at a distance of 1ui gaixn b*s2uh2.h.zgy*yoh 285h r4.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distancmm7d p: s;r6 zb/gpwvxo0f:s.e of 1.50 m from a 50.0-m:spxs7z:;o0/ .b d6gmfvpwrnC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thj2h;z r2j 7i(g v d;ldn8oe7gge electric field at the looz 78v (;lnhij2g rg2ej7;dgdcation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of ;on(wfdcon4fk4 5 0lvthe electric field44 5do(cfkfwl n ;on0v?

  A 5.0-C charge is 10 m from a stubmp;xrp v0l:wlr1, *,q 4zrmall test charge. What is the magnitude of the f0pl ; : rp,,rbxmtzq1v4*ur wlorce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value ofhxi s4k cr2*)h 3.0 C and are separated by a distance of 4.0 m. What is the 4ichrx2s *k)h electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meterhsf4mg 2rp15 r stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm markmr1pgh f45rs2?

  A 5.0-mC charge is pla66 gtbf*khm6y+. sf0 2 rmqbodced at the 0 cm mark of a meter stick and a -4.0 mC charge b6b+s.6ohtq *6rmmydk 2f 0gfis placed at the 50 cm 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 mC are placed atfwshnmu33 rkm 1,c)j: x = 0 and x = 0.20 m. What is the magnitude of the electric field at thcuh3 fr3j,:nk ms)m 1we point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Tyek0 sguz2a.t/vv90 p he lasy0/.2zeup vk0 v9t gast corner is occupied 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 the cor wnv pbu333i(32fooaoners of the square as follbopu3 no vfaiw 33(2o3ows: +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 center?

  A force of 10 N acts on a chargv bhj+ig71a o5e of 5.0 mC when it is placed in a uniform electric field. What is tha+ hiv7 b5goj1e magnitude of this electric field?

  A particle with a charge of 4.0 mC haff.:z5omqplyj c9z0 mbh*h) sxla- y17ad .t2 s 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/C poi8dxxz9-mrq 7tz5u 9fy.h: xpk nting downward. Wx.8:rdx99p f5 xqkh7mty-zzu hat charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a chaeaftl 79u mfd4 ib)x6;q6ii- 2/pycf drge of -2.00 nC. The ball is placed inside a uniform electric fieldft fi2 dx-bilq6 6ui/a4c;m)9ye fp7d, 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 p;2ua3/rmsvede of the electric field 5.0 cm from the spsup2; v3 e/mrahere's surface?

  A metal sphere of radius 2.0 cm carries a chargtgj ,xt09gr02 gp hxonp/*i7ke of 3.0 mC. What is the electric field 6.0 cm from the center of the spherei0o2nrt9 / ,hggx0xjt p7p*kg?