State the law of conservdq( d)hc kn7o3ation of electric charge.

  Is it possible for two negative charges to attract each ot/ v)o(q+4ytu kk+v vmuher?

  Is it possible for a positive and a negative charge toux3m:r) oyid) attract each other?

  A glass rod is rubbed with a piece of silk. During the prs swr*qu)dj19u 9pb9 qi9dmj- ocess the glass rod acquires 9-mbwr*9psd qdjqu19ij9 su )a positive charge and the silk

  A proton carries a

  The model of the atog)x iz ,e(2bh**y euefh m6npih q098wm shows a

  A neutral atom always l1qc7 g3u9cy y: scrlnpx7qn7y3u( )ohas

  An atom has more electrons than 0f rp7 w8+d-d)f zbtyeprotons. The atom is

  Materials in which the electrons are bound very tightly t9+ h1wdn nu,nmo the nuclei are referred tn1,mhu n +9wdno as

  Materials in which the elec n,r:l wx;oab2trons are bound very loosely to the nuclei and can move about free:nr;w,o bx 2ally within the material are referred to as

  A negatively charged rod is brough6f926ww2m :w b) nejxjqdnik9t near one end of an uncharged metal bar. The end of theimkxjq2:d26 6 fnwbe9w j) w9n metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and c pjdpuv06 b1fc f)0w+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. Wh0 1fv +6c)pbuj dc0fpwich statement is correct?

  How can a negatively charged rod charge an electroscope pos)aq*cmdqbve wl.5 ; o3itively?

  An originally neutral electroscope isbalj.r3j/58psbq/od : xx c-m briefly touched with a positively charged glass rod. The el.-rm/ jqo jc/ds b3pl5: b8xaxectroscope

  An originally neutral electroscouba +) *5qc0cux5bzb xzzv,5vpe is grounded briefly while a positively charged glass rod is held near it. After the glass x ,vcz*c 5uxavzqz5bu)b0+b5 rod is removed, the electroscope

  A positive object touches a neutral electroscope, and thecq7veef ovf7a/74-vj. ybze;7j .aom leaves separate. Then a negative object a7ofjb.yceaqevv74.ov 7/ez7 -j; fm is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. hx;w(etrl4bto8eq z 3-d+ -k cc.3 yta 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. What is the fwle tz t+ 3e .8thy-kd-q;x4r3ca(cob inal charge on each ball?

  Charge is

  What are the units of the Coul*gcgsot2n/*j, hlq+t omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separat2u 7tbnwg:wh2x:be b7 ed by a distance d. The first charge is larger in magnitude 22xwt:b:wbgbn7 hu e7than the second charge.

  Sphere A carries a net charge and sphere B is nea5+jjuq8/c)nvdkrc0a gc + v)utral. They are placed near each othe)vqcg/ 08c5+ a ud vjr+a)cknjr on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chargj0x .ilvsyyz*su/x:9es on both objects are doubled with no change in sesu xx 0ily.y s:jv/9*zparation, the force between them

  Two charges are separated by a distance d and exert 0tnhrt)9w81g oa4 t) hht 9endmutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mut4 oga19nwtrt8tneh ) )hd0h9 tual forces?

  Two charged objects at0kw+p8xrzi,mqi h9 +ui 9 akq.tract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation dikiqwrm8 iq.h+xa u 90+k,p9i zstance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a protort)t:xn:hbr 4 -)iiou n are separated by a distance of 1.0 m. What happens to the magnitude of the force on the pi i4r:h-x b)r o)tt:nuroton if a second electron is placed next to the first electron?

  An electron and a proton ara j z0u)bltc)3e separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a c)bzl t)3a0 jusecond electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Whatm4 q5db2-ac)g oq88oi (mbt+fs sqm9 t happens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton?m5- otcqi+( bd 4t8mbq9am2q gos8fs)

  A point charge of +Q is plac31fn ik rc8; y79midwm wre c;v,c3qg8ed at the center of a square. When a second point charge of -Q iy w9ceqm;c gw33 i dvmif;kr178cn,8r s 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 on the positive charge at the center of the square?

  A point charge of +Q is placed at the centc:i(5rlza2e7 pe8r gl roid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N ac5z:e 2e 7glr(aciplr8 ts 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 is not a v a.wibf,:dkr l4u,po8ector?

  At twice the distance from a pdihb).o7k cme4p g** qoint charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and positi het0p/g)js mwgop ;3;ve charge along the line joining thg; g0 3potjwe);mp /she two charges?

  Is it possible to have a zero electric field value between two positive charges zz9qarj f,9 ixbj v5o:,w)hh9along:wj9zzo jv5xibhr f ,h), 9q9a the line joining the two charges?

  Electric field lines near psitive point cham3 qt9tdfv-*u rges

  The electric field shownq6lhpx*45u y b

  Can electric field lines intersect in free spacs;am ,dw 1i:lq s 2n,sspz19uye?

  A solid block of metal in electrostatic equili3r792grq1 yh.pdqdu k0; u tsubrium is placed in a uniform electric field. Give a statement concerning the electric field in the; rq2y730 d tg1h9us kruupd.q block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gizfci 7iddp.j :0;xbt (ven the same charge, the electric 70:zjfbp (;tcd .ixidfield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a u6h4hj8 pe) vhmmms:i n8v4/0ekmszc: niform electric field is directed straight upward. What can be said concerning the charge on the block's top surehimscvhk mhnjm :mp0 :4s )4v86 z8e/face?

  If a conductor is in electrostatic eqv c+q-x(jq p+hqz+4ibxp :*q quilibrium near an electric charge

  A positive point charge io3a; :wtw:n)q 93rvg+va hb7k fox o8as enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow o w9a fntaxra3):v bgv+ ;hk:37wooq8sphere has

State three properties of conductors in se5dzx 1l*6a qctatic equilibrium.

State Gauss's law.

  The charge carried by one electr 60vmg twfc3ahf1d7,a,(teilon 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 z/fq o7o/xwd)g2+w gd71 ixuymany more protons than electr ifw7/d/)oo27 ux wgx1 +gzdyqons does this piece of plastic have?

  What is the charge on 1 kg ;q9b2xngq 1rxcu4w9zbe .ch 0of protons?

  An atomic nucleus has mxlcsbl rk/s8 za41n4m.2a, fa charge 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 5lb r .f/riwprd.eh +9values of 2.0 and -4.0 mC, respectively. What is the mhrw.brfi rd9e .l5p+/ agnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second chaz7femy*lvw ,1t c+u-wrge, and the force between them is 1.0 N. What is the magnitude of tht*- zvyul+7w ,w mcfe1e second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apit-5kgnox6ltz; d 3i-p:lr 5uart are they?

  The force between a /ona,d) 5apu v$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. I*+si yl/(snfpf they are moved to a new separation of 8.0 cm, what is the electr* i+/snsp fl(yic force between them?

  Three identical poin/ yt9exik8h6 hfi1q29xw u- iot charges 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 magnitut6x fiu/q82xe1 whi -oyk i99hde and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A char, czy 85did./l kolkrfqmp:j)we6 iut1u+e1(ge 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 direction of the electrostatic force which acts on the charrd.+ek ucyf oz:pj/i) 6,kdl( wl8tu qm511iege at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x = dt*0r dkmo/p,1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. d0d*okp, tr/ mWhat is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Qql i,fgpidg cmp+e146-dk 5- o83 udbe is 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 po 6-3- odecpdb,qk4ulg mgi dfp+15e8i sitive 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 w n6ppc s93xg/is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net69 cswnp 3gpx/ force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0)v 2e22ww,0h f7 ,voyj x1yjprj; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direc 7j ,2o0whevx1pr, wjfyvjy22 tion of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC arw3kl/s0a4n9c ;gsp u1;knji x e placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force skj3 sg4u1nap; l9xcw0;/ikn which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what pojb: csht4v:0b- j 2tzmint, on a line between the two charges, would it be possb4bmhjvj z t:c02:- tsible 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 (dvmh5hj zi8*g 3o) kg+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be p)hd igvkh(* 5jg3m8ozlaced so the net force on it is zero?

  Charge +2q is placed at the origin and chaif- nnlv rlzrldc(i91bu ,w.b:19 q0grge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zerli9rf -0:dg zwr1c9n(.vuqnbib l l,1o?

  A copper penny has a mass of 3.0 lnoi 5f2(4 ykeg. 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 gravity by the attraction of avw;36s w ism,q fixed proton some distance above it. How far above the electron is the protv,ww;i 3m6ss qon?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads9wd rv9cn ,2ni which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apa 2riw,9n 9dvcnrt 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. Whab6q obad a,6u9s2qh i9t is the magnitude of the electric field at a distance of 1.0 m from hd 2ab,9qqub is6a69 othe nucleus?

  What are the magnitude and direction of the electric field at aph ()6uyn f9im distance of 1.50 m from a 50.0-nC charpyh )9m( f6nuige?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of th4km:pl +xy6ih e electric field at the location of the test char 4implhk:6y +xge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction mhar3o:7p55q0 nn8aa) qo)bx9swn ic of the electrioax7 )ciwbn)5mqn9q85 nr3a0 h:sopac field?

  A 5.0-C charge is 10 m from a small test charge. What is the magj;7m, 4x,oaob s gpts7nitude of the force experienced by a 1.0 nC charge placed at the location of the tests 77bp 4 g;xms,,atjoo charge?

  Two point charges each have a value of 3.0 C and are separated b0uy.dx5ghodruei /9 (y a distance of 4.0 m.e0o9( dx.u/idyh g 5ur What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a vtjb6 2n1:aeztcml7o+o) :x emeter stick and a -4.0 mC charge ): o2ox+tbt:6anl meezvc j17 is placed 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 stick and a -4.0 mC gp tf(.w4uf ,bnit.c uu(*se)charge is placed at the 50 b wugct (.f.4i t fs*,uu(n)epcm 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 at /ox s+6xoq- ydr lj/k(x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betwq(y+6-rdj losk /x/ oxeen them?

  Three 3.0 mC charges are at th5ssnxe6zh(ghf1 qlh f);;vp0t9d; m fe three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of6 hfnffvs1hxgqt9p5e( ;z;s; 0h)ml d the square.

  Consider a square which i 2arngafxn n36lfh41fk,9- pes 1.0 m on a side. Charges 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 atarh 4kx 9 gn6ef2apn n3,-ff1l (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 i2db gquag s+z + -)j8q(d*ziwit is placed in a uniform electric field. What is the magnituau8 d+js 2 giq)+gizqwd(z *-bde of this electric field?

  A particle with a charge of 4.0 mC has a mass oykd7 h l2(f;mwx:gj4mf $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed in crc 8/o4z;ao 4 c*dkzq z.0hovan electric field of 6000 N/C pointing downward. What charge musc h0o8. dkccozz*4o;/aqr4 zvt 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. Th.l; 6sl* 8out i:/hzzgtwx5idp fwe*7e ball is placed inside a uniform electric field, and is 6xd/gst.ze l tu7hofi;z w:lw*i *p58suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charmpz s v *(,wxi)kb9/dfge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's s,x sd9v)f kpw(zim/*b urface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the( 8eh- n)s, zesf.sdiz electric fi n8-. (e e)szh,sdifszeld 6.0 cm from the center of the sphere?