State the law of conservation of elelp:xtd*4f dl-pv)cv .ctric charge.

  Is it possible for two negative charges to attract each *xw bf,(qvcc ;other?

  Is it possible for a positive and a negative/37xd yz7upa- kf:6pwi1 p wdw charge to attract each other?

  A glass rod is rubbed with a piece of silk. Durin mt/4 sk9 ,/sua9phjxng the process the glass rod acquires a positiv/u tas4 ,sh9 9/mnpxkje charge and the silk

  A proton carries a

  The model of the atomk7sxugrd vord ;.o -// shows a

  A neutral atom always hhs 1pk8kjl:8 kas

  An atom has more electrons than 1w f+6a6 slko3zed6cqprotons. The atom is

  Materials in which the electrons are bound ver +8fbicj3 vf9iy tightly to the nuclei are referred to3+fviji8b c 9f as

  Materials in which ts lty9sx.a(6q he electrons are bound very loosely to the nuclei and can move about freellys( 9qxtsa6. y within the material are referred to as

  A negatively charged rod is glmy:)rb3rx o0ro.z,brought near one end of an uncharged metal bar. The end of the metal bar farthest from the g lry)mzrb ,.xor0:3 ocharged rod will be charged

  Sphere A carries a net positive charge, v7qyp kb f8o.s4oz3w 0and sphere B is neutral. They are placed near each other on an insulated table. Sp7osq3 p.0b ykozf wv84here B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chaayy/r1dg f o2.dd7 pk:rged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chlo4.iu2le8ikf :u , mharged glass rod. T8eh l fuo2u4 .,km:ilihe electroscope

  An originally neutral electroscope is grounded briefly while a posi38 n-l9r3pqjvicoa fn)19ecaay a3e5 tively charged glass rod is held near it. A - nc3 n3)eaa3 iroav5f9plcy8jq19 eafter the glass rod is removed, the electroscope

  A positive object touches a cf057 1psp7,gw cw uzbneutral electroscope, and the leaves separate. Then a n71zb sg7c,p wuwfcp05 egative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulaeq) 3j fq .lz8a2z1n:emwlt :fa ;cph2ted 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. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negative object. mj8h)1q:2 ;cel:3ftaenl w2zza qf. p What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb co1 cq0x l:w*rwnnstant $k$, which appears in Coulomb's law?

  Two charged objects are separrq/mv nc pm.3c;ot) )wxn h2t; ki*2oqzk.-blated by a distance d. The first charge is larger in tc ;tr ilhz;m n2bpk-*qqomcwnkx3.. ) 2v) /omagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. T(m. pf,;)cnzmza ar6fhey are placed near each othe 6 mfaz.rpnf ca,m;z()r on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects i9(bp v1fnil1attract each other with a certain force. If the charges on both objects are doubled with no change in seli 1bpf1 vin(9paration, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces vxvzt11p ey+*of F on each other. If the charges are separated by a distance of d/3, what xv+e yt1v p*z1are the new mutual forces?

  Two charged objects attract each other with a force F.z..*w) jqpv)zw-2vhweqs s4 i What happens to the force between them if one charge is doubled, the ) q.-wpw 2)zw.4e*vs jqisvzh 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 ar h4(eipztk9q- e separated 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 elect(k49 eqztihp- ron?

  An electron and a proton are separated by a distance owbb*oxkp 3i1is0tt w(szne8:yttqx321 wv - .f 1.0 m. What happens to the magnitude of the forcewitpnsb1.xbvw 1t3q 8*3si2y w -k(:0otzxet on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 lz)ny621 ci cqm. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton? 6li2zc y1qn)c

  A point charge of +Q is placed at thr78et;wbkb h .e 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 of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting r bkh.t7wb ;8eon the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral trianglee3p*rb-id,ijxn1 x*i ysj oim(:3u(u. 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 placed at one of the other vertice j (i(d*jp o,umnx3yi1i 3es:b-ix r*us?

  Which of the following isxrycz(z:wq zl 3 4sd7 i6b1i-k not a vector?

  At twice the distance from a point charge, the strength of the elec:*dvjtu)2 a-vfg1pz /m at9rt tric field

  Is it possible to have a zero electr1 rn2w2 e,jljkic field value between a negative and positive charge aln22r jwl1je,kong the line joining the two charges?

  Is it possible to have a zero electric field value between two pos6jj9j6*wzg; j/4 t mbf8euwfbitive charges along the line joining the two chaz6ffe*4g wt/ju;8jm9 bb wj j6rges?

  Electric field lines near psitive 2k;:gna jmtuzq;)w) lpoint charges

  The electric field shown shp 3tgl3v8 )jr pt 9(0ng0swi

  Can electric field lines intersect in free spjjm*6*2 b0cua pvjg e5 zx:d*cace?

  A solid block of metal in electrostatic equilibriumtoen0 l:rjxe-tzf3g /qc 9)4zn aqj16 is placed in a uniform electric field. Give a statement concerning the electric field in r- la e:c/)0oje9gfq qt4z6njz3 1xtn the block's interior.

  If a solid metal sphere and a.-mn6vga vn khg/:o 5a hollow metal sphere of equal diameters are each given the same charge, the electric field (E :a -hn6mkvog/g5van.) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifogp 1tbr 6tz z)c*plvqc -u2.k1rm electric field is directed straight upward. What can be said concern2-t)1q z kccrz.*1t6vpglbpuing the charge on the block's top surface?

  If a conductor is in electr/d7zo qiv-nik/0p7 jrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metalli u/nkk9gem+:n c sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above kum/+g9e nkn:the hollow sphere has

State three propertiewxiv.v8ux 2 0(qq d.fbs of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron isq/c l6lz2 .ice $e = -1.6 \times 10^{-19} \; C$. 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 +o3mgpu6o f.tthan ele+pm6f goto.u3ctrons does this piece of plastic have?

  What is the charge on 1b+/et mk1 v vo1h7*qigmir3.f kg of protons?

  An atomic nucleus has a ch-9pw3/w sllv harge 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 valu3qw)cki2rifg 2rv jov1oi4 (/ es of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force 2i/v4)jkivc w( 1 r 2grioq3fobetween them?

  A 1.0-C charge is 15 m from a second charge, yl wap..fcs71b-y+mi and the force between them is 1.0 N. What is the magnitude of the second ca-m.cy+liyps b f 7.1wharge?

  Two 1.0-C charges have 6x3tr:pz*kl79qq8bh )nzp dua force between them of 1.0 N. How far apart are they?

  The force between a ) 0vn 1b-ocbkt$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expe j 2oq-0j5otp 6v1fbwbrience a 1.0-N force. If they are moved to a new separatiob5j6 0-f12bwqo ovtjp n of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on tsv:f ;dee- y lgif+9 t,w;fm+d d8j9gehe 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 magnitudeegfm 8esdgdwvfj;,d-li9t y:+ 9+;f e and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A ey 1sv/iz0t6a charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, / z1avt6sie0y 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 j( k p;zf, 6gcoeu.cm5are located at the following 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 ofu ,fem6c(cg kjoz;5.p the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a srlm:9z v2,f prexg/ n wo;dtx*7pu09z econd point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic fot,9p9pu zw0fxz ;el:nmo 2vd7r/r gx*rce 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 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); )3 eefr9gn e7ia ,3hl3d.ax0 ldbmpi*Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on th)l 3e.nb3g9 adm 7eed0f a*h3l,pi rxie 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-d x snag;*oe(q:ar-iti0bo 1.0 nC is at (0, 0). W-axa*r;-s iio 0:tgo1b(qendhat is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices krhvac9.; m)3gj:b yw of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which actm)kwch.j9arb3 :vgy; s on any one of the charges?

  Consider point charges aq3tyax7w7wty 0i + y4vet0(yof +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the 7yy e wa74y(+300yqt wixtv tatwo charges, 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 charge is at x = 4.0 m. Where ef :.xfm:x 8fzon the x-axis :z8x e fxf.f:mcan a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and c(pexf:3 - aexeharge -q is placed at x = 2a. Where can a third positive charge +q be placed so that thef: -px(aeex3e force on it is zero?

  A copper penny has a mass of 3.0 g.u c u4re/prqu/i31qr. 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 9lf u vykg*1wzb *t,mia/hm/ze4xq 81force of gravity by the attraction of a fixed proton some distance above it. Ho9x 1f/m,/ vgbzt4wq1mei alu*hy8kz *w far above the electron is the proton?

  Two 0.20-g metal spheres a0h mavmm3;h 3yag -ji-re hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads im3 gh--aa my;30m ivjhs $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e5 iok b:sr :orj*,tng-. What is the magnitude of the electric field at a distance of 1.0k bjo*tr,5n:s -:ogir m from the nucleus?

  What are the magnitude and direc-zhq0zn (f e x2z*-sm x-pff*/izisb 4tion of the electric field at a distance of 1.50 m from a 50.xp0qi z(/zesfnfzshf*- im 4b- *-zx20-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is tb(2j rz1v-wqf3gd ;jehe magnitude of the electric field at the location of the test chbzj-wd3ge 1 fqr( v;2jarge?

  A 5.0-C charge is 10 m from a small test ch7 b yuv*cme;l,arge. What is the direction of the electric filu;e vbym*c,7eld?

  A 5.0-C charge is 10 m from a smallg t51c1)pueeq1*mu t s7cp8cv test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test charge tqesugpc8t117 c1)eucvpm5 *?

  Two point charges each have a value s5b qq8 uo okfadlz*c.g4p9*/ 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 u* gozq5 /ak9 p*.lds4cobq8ftwo charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickm(atj ;u vo v h2o3fxgyc(*q gp1. iw)tm81sl3 and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30s3qjl8 mpox2 vct1yg3)(w*v1f.(ha;mtu igo cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter s*y 4-qgeoe/ gavbis g59g+ke4kf8o5s tick and a -4.0 mC charge is placed at the 50 cm mark. At what point on e59f5 g io*g4 sq+bg 8kag-oske4v/eya line joining the two charges is the electric field zero?

  Two point charges of ylwi* cy2*r k3+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 ati3lyy rk2*cw * the point midway between them?

  Three 3.0 mC charges are at the three co*mav4twch c3w 8.w2 vvrners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fih2wt43mcc a 8v.wvwv* nd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are)+p mbb3 9jx7(q ulqsnm*dx -b placed at the corners of the square as follows: ux msp+ bq3*nqlm 7( bx9d-b)j+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 4wz*3iy p69abw, dun wt*pn 0kxi,4m aon a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this elintd0wn3m4 w9,zp *p *,yaw xubai4 k6ectric field?

  A particle with a charge of)hal ofz .bqw8ry;b2* 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 depv 4u)f8jmr8dud,/( izf(b field of 6000 N/C pointing downwa b /upv( 4)d,(rfzujei8dfmd8rd. 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++drh b) m,zaq nC. The ball is placed inside a uniform electric field, and is suq a,+)zrmd+hbspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radq;e8vbc/aui* )pn1ya ius 10 cm carries a charge of +2.0 mC. What is the magnitud vy naqcuip*eab 1;/8)e of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of r5c/5jemi nkxn0m9(g3.0 mC. What is the electric field 6.0 cm from the x 0 ngj5cn59r/(mekmi center of the sphere?