State the law of conservation of electric ch 3e6v4. fl2xoq7x; edqjhc 0dkarge.

  Is it possible for two negative charges t3o 0vs*frk,nq o attract each other?

  Is it possible for a positive anzhit-)pzd j dzx/6.4 od a negative charge to attract each other?

  A glass rod is rubbed with a 1f h-v/ri.cuhpiece of silk. During the process the glass rod acq c.riu /hhvf-1uires a positive charge and the silk

  A proton carries a

  The model of the atom snciydr, 7t 1awq,h- ..6pq ipyhows a

  A neutral atom alway zw+8zew s nlr78-16 e*rcuergs has

  An atom has more electrons than pxrp;u ;)xva: e4k;5xqp nsh/ arotons. The atom is

  Materials in which the electrons are bound veo(h3rwo *xzs )ry tightly to the nuclei are referre(r 3)hw *oozsxd to as

  Materials in which the electrons are bound very loosely to the ; j* qbwiydj4y-8gzx9 nuclei and can move about freely within the miwgjd j8;yy-bz q 4x9*aterial are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. Ths )7gclsvph:y1ms6 d)e end of the metal bar farthest fhgs v l)s ):617yspcdmrom the charged rod will be charged

  Sphere A carries a net positive f;nh4czdh4i6 k 3t.nenz7-b zcharge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement i6n ;bzhnztekd7 .zfh n4-43ci s correct?

  How can a negatively charged rod charge 4o3/dl (fe;jmdvuuw 0 an electroscope positively?

  An originally neutral elec(9.ijncacuy /troscope is briefly touched with a positively charged glass rod. Tu9(aci /nyj c.he electroscope

  An originally neutral electroscope is grvvtqy ( u8fqv8f()q). lzck8vounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the 8( qq)vf(fvk)lc y vzuv8qt.8 electroscope

  A positive object touches a neutral electroscope, and the leaves ;l2x-q vimw+4fo ihxdg* p:o/separate. Then a negative object - o*g xwmq2; ilx4/dpf:o+vh iis brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on /m bj 4kju/n.j gyzkj8m4 (ym6an insulated table. A neutral metallic ball rj j4 8k6mybuk.n g(yz m/4jm/jolls 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. What is the final charge on each ball?

  Charge is

  What are the units of the Coulo n tbg6s:iz vo/:d8g (3eag7ucmb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargj nefo l :sp8g6qy2o:)e is larger in magnitude than the second char)j8s6nqyl g : ef2p:ooge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nzndb2c9kc) r4d93 glq ear each other on an insulak4 3qdl9cb )g zc9nrd2ted table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a ceaecf5 q cr96/vrtain force. If the charges on both objects are doubled with no change in separation, the force /c56ea9rfvcqbetween them

  Two charges are separated by a duz* hn*uyu:e c gu0q8*i9 d7axistance d and exert mutual attractive forces of F on each other. If the charges are separated *908uen7u y** ux: zq cghiduaby a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. Wh.9w-pezmd n*a evl/3eat happens to the force between them if one charge is double 9*-z/vpelen ed 3m.awd, 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 separ69sswn1gj jv7ated 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 elg 9vsj6n1jsw7 ectron?

  An electron and a proton a : iwcs/mhqr1sqv0k h8:20y gire separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to m1 g/w h0 sq2k0h: ycrqv:ii8sthe proton?

  An electron and a proton af1/hsc sm8 z*3szjvho//k k6p7v uya/re separated by a distance of 1.0 m. What happens to the size of the force on the pro /s3o shm8hz//p k v1fcz7v*uayjk/6ston if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placedlixj1m tss t0*7s j04s 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 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 oxss4 *07j0m s1s littjf 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 equil d obc*0m3 maj:prow2u86mp 9zateral 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 centp026rdwam 9:8um3om z jc po*ber charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vectep l3j7(2mtd)wd -)pzgu zb5 ior?

  At twice the distance from a point charge, the strength of the el8o-7tf/q f7ad o(l3cnkwce u/ a88pykectric field

  Is it possible to have a zero elecueigmzv s20py+ 14/ dstric field value between a negative and positive charg2 up+0 s /vi1ymeds4gze along the line joining the two charges?

  Is it possible to have a zero electric field valu qj.fstzs- z4.e between two positive charges along the line joining theqzs.jzt f -.4s two charges?

  Electric field lines near psitive point charges8wez jhj)u-70n5hv:w lfiac8

  The electric field showo99b.a r+pmq d07q gnen

  Can electric field lines intersect in freebc4a0byke) 0 e.wj e9e space?

  A solid block of metal in electrostatic ee)2(ztas y4l bquilibrium is placed in a uniform electric field. Give a statement concerning the electric fi2ly )s4ea zt(beld in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal dv;f:5(lwi6i ss1od 7qbam)a i x.(yxaiameters are each given the same charge, the ela1.lqwx(oxy siivb6 : ;7a)if(5d msaectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden t 6ygstkw, r/ovru)s ,5able in a region where a uniform electric field is directed straight upward. What can be said concernio)r 6vtw5,r, gkssuy/ng the charge on the block's top surface?

  If a conductor is in electrostatic eqtiwcdhs/b5,5be y*3uq *,jiwuilibrium near an electric charge

  A positive point charge ies+ a uuq3x-.;i pf xov xtm)/t(1dc;js enclosed in a hollow metallic sphere that is grounded. As compared to the case wt( /jmp3- au ;i)s1fvoectx.d;qxu x+ ithout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties ofynk6g+) gym q: conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron ises;s gk019hpfsx p 7r. $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a sjc4* uthi 0 ki,d*gk/net charge of +2.00 mC. How many more protons than electrons does tgi jth,k *si0k4uc/d*his piece of plastic have?

  What is the charge on 1 kg ofkxf6ik abfj6) q:f*;5kwv *pst(oe m( protons?

  An atomic nucleus has a cha1nm v1 ;bc6kbnrge 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 values of 2.0 and -4.i ;/o;7s tsns2msz0 uy0 mC, respectively. What is the magnitude of the electric force betwsos0n;7ut yi2zms/ ;seen them?

  A 1.0-C charge is 15 m from a second charge, and thez7d27) ot j0bu+rtv ec force between them is 1.0 N. Whate+02c 7zrvj)uttb7do is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apar b b*juc c2k7-w(,)h1m-rlb/kazbyl lt are they?

  The force between a duuz8( +xc+b ys/+kws$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initc7,c.hwj 35s3 v7kvm:iclg noially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0, nw m3si3h vocc7.klj:5g 7cv cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are p4((3f-r jzl5f zpdt kt yzv7(mlaced 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 the charge f(yt 4p(zlkzv 5t -fmd3 7(zrjat the origin?

  Three point charges ar1c-o.i+c 2gn c -bqmare placed on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C toirc 2 -g-.nqcamco+b1 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 following positions: Q1 =g:3mrk2 tz1 tui6h hky)fyw ., 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m.2z6iykyfk ur 3ht,g . thm:w)1 What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at blq4 .(bpo a)g9zu( ov1 uyg8c;jith1the 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 q1t)y;gh jvap b z4g8(cbui1u 9.oo(l 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); Q3 = 5.0 nrow 4:a)zk* ul kadh(8C is at (0, 0). What is the magnitude of the net force on the 5.0:z4 dra )a8kw(ko lhu* nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 3bnnz 1 vg/ep9ba7hz9 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0)z3vp/ga9h bz9en7b1n . What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertx frm:2(j8n:jvbj7ou8gg :tkices of an equilateral triangle which measures 30 cm on a side. Whaf::g 8n( mjjk8:o2ubjx vt r7gt is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q kjy v8r. 8i2v,y0szgeo8r,aw( b zt(land +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 thatitrgz8.v ,l zw0v8 j8kbo,e y((arys2 the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origix 6s. ixcul90wn and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force xs0l cuxi9 w.6on it is zero?

  Charge +2q is placed at the origin and chargmp-;/o10faflb dcda( e -q is placed at x = 2a. Where can a third positive charge +q be placed sob l1fpfdc;-aa(0 dm/o that the force on it is zero?

  A copper penny has a mass of 3.0 g. Au octq/mp;qv(no)v/ sx 3wm(6 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 attraction of avxb6of;d .n(oat ier3a9 -k 1d fixed 1ri6a ;k-nd tx93o dba(o .fveproton 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 nonconducting lst83m2y b6/p )1/yk dnbunmulknz (*threads which akn83kzu2my 1)/s d/plmn6nu(lt by *bre 30 cm long. Both are given identical charges, and the electrostatic 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 ib,k b0:v ys9j+40e. What is the magnitude of the electric field at a distance of 1.0 m from t b:,kjvby90 sihe nucleus?

  What are the magnitude and direction ofk r4 fgig(kxl p(s y)v+p9u-b5 the electric field at a distance of 1.50 m(ig94b k5g)-l(xpp+ uy kfvsr from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is *v7ps+ si.t 4enlb jpos0(r :uthe magnitude of the electric field at the location of the test cha st.ovul+(e:br s i4ps*p0j7n rge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of th*v q hi*zo:pc- gbi6lgvz2+,d(sxdw8e electric fil 2g -(gbx*+*sdq z c,z: i6iovdvpwh8eld?

  A 5.0-C charge is 10 m from a small test char6uq-f:dg9q *1r:lngl y x5ds sge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thry:-qs* ugldqlx165fn : gsd9e test charge?

  Two point charges each have a value of 3.0 C and are separated by a distaxwm z;r4 v7e; pdb(,(8jav+3mwqryze z- b2a jnce of 4.0 m. What is the -e8q xzj2 zpy 4bvm+b,a m7wa er;(v;zdr(3jwelectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 dnks) kg6(7(wmt j/bimC charge is plab(6j/g7i tmks) nk d(wced at the 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 stq4 )n64giq kbv2 y g.jt8f2wrmick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two)m8yk2jwr 6g2f 4 ivtqg b4n.q charges is the electric field zero?

  Two point charges of +3.0 mC and8wff w)0qxt96,las ac -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric fiel9 qwxfc)f w0,6tsa8lad at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0 zqz( )jav phe6c88:gv.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the sq) zvhjeca 8(v 6pzg:8quare.

  Consider a square which is 1.0 m osxj-w9rzp,- on a side. Charges are placed at the corners of the,-w s9orz xpj- 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 center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform elecj7g9 jum2f4n5) m1fao0z eqwztric field. What is the magnitude of this em7jaw zo f51zf u mj0ne24)qg9lectric field?

  A particle with a charge of 4. h(wzo8 a 0855brjapld0 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 xu9o 25dgff e*k+zc4fN/C pointing downward. What charge must be placed on the ball for it to beff +e koudc*g4z29x5f suspended?

  A foam ball of mass 0.150 g carries a jhdl dv- )ohf/+:or96bklia: charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric fieaiblhl-h d/:6+v d)kr:f 9ojold?

  A metal sphere of radius 10 cm clbx/7: )guyjf arries a charge of +2.0 mC. What is the magnitudeg7ub)fyx j: /l of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carriazb*by( o*ki y9c o+,oz.gm* fe/-rpzes a charge of 3.0 mC. What is the electric field 6.0 cm from the ce o/ zyo z(*ofb*rk.c9m+gyp*-ibaze, nter of the sphere?