State the law of conservation of electric chargkua (wtx3+ -bze.

  Is it possible for two negative charges to attract eac qxrg:2e .ax +bfeuootq15o *,goj c5+h other?

  Is it possible for a positive and a negative charge to attrara l42k9jh1: 7hyuo ehct each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod a:p:dhi( z2ryx/n bk4p cquires 2/ znd rixy: bk4(:phpa positive charge and the silk

  A proton carries a

  The model of the atom+0( estj cnn,t shows a

  A neutral atom alwaysmkgf7l zx+n iy( )e:e: has

  An atom has more electrons than protonsl4:zke2z .nfg k j0tpf2 cgl(1b:o;-tve yak:. The atom is

  Materials in which the*uyc1y-uzqiz* ok,k5x 7g5hv electrons are bound very tightly to the nuclei are referred to uu ,7hqz5vk 1kgyoxic *5*y-zas

  Materials in which the electroy c3 vu) pfkc-w5f(3qhns are bound very loosely to the nuclei and can move aboutfwv qp-uc(3h3yc f k5) freely within the material are referred to as

  A negatively charged rod is brought ne p/-ds)(rqrg3pe qfw7 ar one end of an uncharged metal bar. The end of trfrg7qp-p/e )q(d3 wshe metal bar farthest from the charged rod will be charged

  Sphere A carries a nl e kro2(.t3j,use 4eget positive charge, and sphere B is neutral. They are placed slue4.,jk 2(3 rtgeeonear each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chu3lk+x ln(kf+ arged rod charge an electroscope positively?

  An originally neutral electroscope is briefly uoe,u:zui:0 c4pgx5o touched with a positively charged :egi zc 4:05ouuou,xpglass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a ps7*5 tj+7- a bzmrzxyoositively charged glass rod is held near it. Aft7bo7a x- +yj mt*z5zrser the glass rod is removed, the electroscope

  A positive object touches a neutral electrop rf/l1d,n(ly08 qkp pdvs(3 oscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch k0v/yl f( pl3p odr pdsq,1(n8it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral emjfehls r t*,yil,1. +xxz+n+)n a;vmetallic 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+h,s; r1lj*ie n+am en+zlfx.tyv,) x 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 conhlom qluijv -;1w:n *07np i.estant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first ijm-dta6 58hqv :uac 8charge is larger in mag8 au8cj-vdit6 am5q:h nitude than the second charge.

  Sphere A carries a net charge and sphere B is neu emn ;op.l ,-7cscm)uwtral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force b., c p7-lws mm)ceon;uetween them?

  Two charged objects attract each other with a certain forceb c2-ow9oi. at3oqc8 i. If the charges on both objects are doubled with no change in separation, the force between t i3aw8.29o-o qtbcciohem

  Two charges are separated by a distance d and exert mutual attra(y c.o: ,kjjikctive forces of F on each oth,iy:j(ck .kjoer. 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 f,-kr 77cxqnmq orce F. What happens to the force between them iq7 7, r-mnqxkcf one charge is doubled, 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 separated by a distance f,jfac.peq+xa k)jm9(+w c u+ of 1.0 m. What happens to the magnitude of the force on the protfu9+ k(mccf qw.+,p+ aejj x)aon if a second electron is placed next to the first electron?

  An electron and a proton are separatel)h(lh9s5k zix/5n e zd by a distance of 1.0 m. What happens to the magnitude of the for/e shkn9zx55l)li hz( ce 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 m. What happens to li1 rn8neov,8 the size of the force on the proton if,vl r81 oi8enn the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second gah14-k(1k) wpdv im ipoint 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 cornevadhmk( g4-1wi1p) ikrs 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. Whe+o :ndu tpit0 -afz;s-n a second charge of +Q is placed at one o:uda--;0+infsptt oz f 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 is not a vec y(9n 1im:c)+mev6j /8hzbme mj :ynaotor?

  At twice the distance from a point charge, the strength of the tk/vogtwo l:a.l*)j(electric field

  Is it possible to have a zero electric field value between a negative and h2 y-am)wrik4u9rtj 1positive charge along-w1m)4ry 29ah jrkui t the line joining the two charges?

  Is it possible to have a 8gdh )(finu/ 4svhq2 8yd.vkb2 lv.bmzero electric field value between two positive charges along the line joining the vbd)si k du.b2y4f vmhh288(v lq n/g.two charges?

  Electric field lines near psiti5-cveowr h) d50hx4y fve point charges

  The electric field showex: pr.9f hqqkn* kha9wj.)h:t,xqt5n

  Can electric field lines intersect in free spa7dnn(ssb +j, wdcvo ujn9708 fce?

  A solid block of metal in electrostatic equilibrium is placed in a uniforc+xk nm (v*irv 2wc61rm electric field. Gik2r*n+v 6cxv m1iw (crve a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollo c5d3qy2e hf99q jpun*w metal sphere of equal diameters are each given the same charge, the electric field (E) mid n9pqj95*qfh2eu c3dyway between the center and the surface is

  A cubic block of aluminum resrxh4/stfcazu h nl7:+/b:j )bw m(e/o ts on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's zhsb xt/7:hbc rmu4(ao : /j/fw+l ne)top surface?

  If a conductor is in electrosmv1 h+hr: olo(o1kc(jtatic equilibrium near an electric charge

  A positive point charge is encltaex 62tsj1k:la ni/9osed in a hollow metallic sphere that is grounded. As compared to the case without the holle/j 6tl92 naki1a :stxow sphere, the electric field at a point directly above the hollow sphere has

State three properties of cjp n zl)tz3-qm23 e.dyi)cuqp/j1, f qonductors in static equilibrium.

State Gauss's law.

  The charge carried by one electr r cm o (4;emv)d5v(07guvgxwxon 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 .knv3r gpfu5.+2.00 mC. How many more protons than electrons n5.urv k.3g pfdoes this piece of plastic have?

  What is the charge on 1 kg of protons; u ;dazid1 *k73yif tdr3+rd7n ce5bx?

  An atomic nucleus has a chats)x9ae 5qko-(3exy grge 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 charge9(hngtg4 35p9ymj q xy values of 2.0 and -4.0 mC, respectively. What is the magnitu9xh 9t(5 4yq npm3ygjgde of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1/ 5m skdthgn91.0 N. What is the magnitude of the1tg 59sm h/dnk second charge?

  Two 1.0-C charges have a fotum:b6a,5tc n 8 6hsjhrce between them of 1.0 N. How far apart are they?

  The force between a thqx)oyo;r otrs de )r9uqy6 v9:3a/7$30 \; mC$ 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. If the1pv m nkv2m9-dy are moved to a new separation of 8.0 cm, what is the electric force betwee 1pmd29-vnkm vn them?

  Three identical point charges of 2.0 mC are placed on the x-axis. i 5nz ma*/k9dv The first charge is at the origin, the second to td9*im vn/ kaz5he 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 placed on the x-axis. A charge -oc7o+jh h)dis *l4fs of +2.0 mC is placed at the origin, -2.0 m C to the right at x = hd+ilj4 os)o*-shc7 f50 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 followincbl)g xjj; 5rme-axy41 p3d v5 ynd3j3g positions: Q1 = 2.00 mC at x = 1.00 m; Q2 45e5b;3 d cljr3vjdxymjx a) g-pn13y = 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 cente*ts e4(ww .:w3hc i1jyxx)krgr of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electroie(wrhx)* jswt.x4c3kwgy 1:static 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 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 = fqfpfo,rzi)/ 7khi0x, z6 4ak5.0 nC is at (0, 0). What is the magnitufo6zk4 prf,/0z ii7akqf) ,xhde of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 mw() j-t:ezuz p4ngayh ;r89ea 1:fvm i, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the zmtyeven(:u-ip;f8w :1gr jh4)aa 9 zdirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of9w xpxy3e)ds)k r 9hh+ an equilateral triangle which measures 30 cm on a sidex e9r3kydhws+hxp9 )). 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. Acy )r43xhnh 7dt what point, on a line between the7d)34xcr n hyh two 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 on 3ml ggrlkx2c .z8 :h3athe x-axis can a third chargc a3:lg2m hrgxkl38.z e be placed so the net force on it is zero?

  Charge +2q is placed at the origin azi:n+ p60o;vzbf ( lqvnd charge -q is placed at x = 2a. Where can a third positive co qi:vp 0zvz n6;f+bl(harge +q be placed so that the force on it is zero?

  A copper penny has a mass o:h 5dwduxnaxu4l74z m bfx+ *9f 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 up ahkwns. ;g ;wbo37yo9k ( ey:rigainst the force of gravity by the attraction of a fixed proton some distance above it. How far above th3rbi w(k sy:9k;e; oy.owgn7h e electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threadp41ro;) x(p1pbbbw g,f :hszas which are 30 cm long. Both are given identical charges, as: ,;1 fzab4xpg)1opr bbhw(p nd 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 charge3v o4h9nera96tc(:ox( ky/p lr t8zry of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nucl3p :kz94ryx(9 o6ra th 8onyvlr e/(tceus?

  What are the magnitude and direction of the electric fielqg/dgq +owobt0lw4 8ibt;u).d at a distance of 1.50 m .bolq /q+ 4wb 8ut)o tg;g0dwifrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. Wh.v2epw+d 0g skat is the magnitude of the electric field at the location of the tes0. s+ edpg2vkwt charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the e-zsf,ti(04gf vwl ox9lecw4-s0f ix,zl gvot(f9tric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of 7k6m yi37gpbt ftj8 vxa56 pw;the force experienced by a 1.0 nC charge placed at tt 8yf6jxm b 3a7w7t5ppkg i;6vhe location of the test charge?

  Two point charges each have a ,9yyl*ka7n qqds1nswr u u+6 7od80vxvalue of 3.0 C and are separated by a distance of 4.0 m. What is the electric fisvnw9syrud q017 7dnu6 a* +y,kolq 8xeld at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter74ai3dio:i4vx theg, kr3t*r stick and a -4.0 mC charge is placed at the 50 cm mark. What ixg*:hei irrv4to, tda7 343k is the electric field at the 30 cm mark?

  A 5.0-mC charge is pl6h o3-2gg:asmjgu/m uaced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zegmo26j: u /3mgasugh-ro?

  Two point charges of +3.0 mC and -4ql8kw * zuga4ek ;2mo7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betwkqmuz4g wl28;k4oea * een them?

  Three 3.0 mC charges are at tgyc9)gvv +/r e+xov2 ahe three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC ch+/ygear2go x9+v )c vvarge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargesmnj-ann u ;;zr-gv:d7 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 squaau-rn-mjgd n;;vn:z 7re's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placew(j8(kf l(tet8b)na( 8fefc:8 ubb5zmm u a 4md in a uniform electric field. What is the magnitude o(u8mebj()bzn ffa5f (mea tclbu4( 8km8:tw8f this electric field?

  A particle with a charge oliex6cj9 zead s:fnt e:/( y*;mw(9dzf 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 fkdmj s;2)7c/w(pewiz 7far+ 0.120 g is placed in an electric field of 6000 N/C pointing downward.ezs 7a;/ff k7m(i+cd j2rw)pw What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a chaeg1ig *3m+x+nbf7djz4/ me pbmrw 26 rrge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended a rf4dpg2 1zr3m7+g *ebnmjx /e+w6ibmgainst 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 thj h u96 vi5)b.harbeg+al 3ok;e magnitudeg e bou9alk3+ra 65h vhijb;.) of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is thcs1qfu )c *u97ty. y*)o jgwdflejx/ .e electric ue l1x7yy gfjw/fd* .t)cs.9cj)* u oqfield 6.0 cm from the center of the sphere?