State the law of conservation of electric charge 7pm i76a h0sa)z.lnhl.

  Is it possible for two negative charges to attract cpwozhy co y7uv7o7w*v+ /2wca9dt 1; );oxcjeach other?

  Is it possible for a positiznejzr2hlq.o ;d87 cy, +n3 seve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod y.;s1vm2d,l/sj7twac stqo 1aak )g 8acquires a positive charge and odca l1ssw/gkjy;v7 t .a1m,)q8 a2tsthe silk

  A proton carries a

  The model of the atom sz69s (29 7/tkha0js y yhhvcgvhows a

  A neutral atom always haqpz :u 8g (vgz+z1lv2vs

  An atom has more electrons than protons. ce/k*ji* cu45rq2rw0zf p-t f The atom is

  Materials in which the electrons are bound very tigh,jqxih44 d6py-gk yz(,j a ewi0(/pywtly to the nuclei are referred to(,d jp0iw6yqyz/a gp ,k4xh(yj w-e4i as

  Materials in which the electrons are bound very looselgh zv;) a09bhby to the nuclei and can move about freely within the material are ref b;av)ghh b90zerred to as

  A negatively charged rod is brought near one end of an uncharged metal bardbmtk dm.bu3b/mv44g ;t n 5- kdq:8j g4ppzr,. The end of the metal bar farthest from tktmb/kt5r4nvdp;,gq d 4m d j.b8p 3z:u4b m-ghe charged rod will be charged

  Sphere A carries a net positive charge,)eyc:2z 8 a v88;v aun,tfwliq and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly toucheda q;e f v8i:8acz)n8uvyw2,l t with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elec6q whvl:a6+mu0s,v w3i1rc,xy 4/yb f7m fgzmtroscope positively?

  An originally neutral electroscope is briefly touched with a positt );jqep0 e:y09l pbcvively charged glass rod. The electroscop0: eqpejy;0l9)cb v tpe

  An originally neutral electroscopsde 3.h6 vje(iunu +q5e is grounded briefly while a positively charged glass rod is held near it. After the glass rod is remoq. he dusvu(6n+ jei35ved, the electroscope

  A positive object touches a neutral electroscope, and the leaves si;z lp3u eic22eparate. Then a negative object is brought near the electrosc 2z2 uiep;i3clope, but does not touch it. What happens to the leaves?

  A large negatively chargewag aaxv6 :y78d object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it a7gv8a6w:x ay 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 Coulomb co hz(961sps ud a;t:dugnstant $k$, which appears in Coulomb's law?

  Two charged objects aqh;gi c6rt z 57;ky1ljre separated by a distance d. The first charge is larger in magnitude than tt ky;76qc hgij1;zl r5he second charge.

  Sphere A carries a n1g, lwr2 sg*atet charge and sphere B is neutral. They are placed near each o1*t2slawr g, gther on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain foobd0 hrs 8 vn83,7suxlrce. If the charges on both objbx h73 ol0uvr,nds s88ects are doubled with no change in separation, the force between them

  Two charges are separf*.ah dq /m5m o08 ti0s05z2vmmsfybjated by a distance d and exert mutual attractive forces of F on each other. If b 8q./mt0mozv5ss*a f j fhym020id5 mthe 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. What hapu;1z ; eks2gocpens to the force z1s; c2;ogeuk between them if 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 of 1.w(6rw xbdbb.t htc .)7 qky)/w0 m. What happens to the magnitude of the force on the proto.w kq/cwb 7).tb wrht)yb6xd(n if a second electron is placed next to the first electron?

  An electron and a proton n0c7qcin d ,o8r(x43lzdv9j q4gfrp( are 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 the prolrd 40crc (zn73qpqjgd9v 4f(x n8,ioton?

  An electron and a proton are separated by y ektkg)+z*3l z70bjw 5ia4m ea distance of 1.0 m. What happens to the size of the force on the proton if the electron is mgab)3lmeikj5k+*7z 0wy ze 4toved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. Whc3/zjb+ 0ain bn6xvdd ,c38,-ii sbxven 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 on 8/iv0inan3jc, 3,6+iszbcxb dxv bd- the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triaoezatbl:am.o)kdb 3t**u-n7+rd3 vxngle. 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 actzut*-3m)ao ol . d:exnb3 7vdt+k abr*s on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following i.t g+yfhu;unwk; /w x/z2xs z tqe)gk2)n2c8is not a vector?

  At twice the distance from a point charge, the strength of the electric ;rryx s to.7qn( *gj3vfield

  Is it possible to have a zero electric field value between a negative and po3f9+ yc+v7;ao xnnirp 77h qevsitive chargofyen9xchi +vpna 737v+qr;7e along the line joining the two charges?

  Is it possible to have a zero electric field value between two posl +-wmm07:qel3zi tjp itive charges alozj- lmwlt epi0m37 :q+ng the line joining the two charges?

  Electric field lines near psitive poina(+p*-y9 dtb.okl x/clfmy; ct charges

  The electric field shown :g5xu)f j i-gr

  Can electric field lines inte4z s4gs56 ge6pab eus0km 51iarsect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform eleb+ (m9oa w;grdctric field. Give a statement concerning the electric;9rod(bm+ g wa field in the block's interior.

  If a solid metal sphere and a hollow m97lz;:eio h,hv3m5 )h 7qe ,psarcjewetal sphere of equal diameters are each given the same charge, the electric fi,h w :e jc qzvsoerm35,aeh9l7; 7hp)ield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a un 2q dnhl c+(a3lg2sl-ciform electric field is directed straight upward. What can be said concerning the charge on the block's top 3 +a 2 lhnqld-c(slc2gsurface?

  If a conductor is in electrostatic eqprq17 g7gzfed rbxm9ch2f799uilibrium near an electric charge

  A positive point charge is enclooz7cli,bl r (/sed in a hollow metallic sphere that is grounded. A/b lorz l,(ic7s compared 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 equipjf2yi5)5xc hlibrium.

State Gauss's law.

  The charge carried by one electr,-ykenh:y3rircn-g) on 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 /evs 4 *4/n1psnr h -k1kpxkuithan electrons does this piece of plastic hav/ ih/pkk krus v-44npnx se*11e?

  What is the charge on 1 kg of proto1)y lsf0rpzb /vc8q ryr*83tins?

  An atomic nucleus has a charge of-d7w 0g4e:karyqa wikxz;d29 $+40e$. 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 c4+vkbbhr(z8f wid3..0 mC, respectively. What is the magnitude of the ele83khzrvbb i 4.+ fw(cdctric force between them?

  A 1.0-C charge is 15 m from a6* y ,g(u 1rwblun6tqo second charge, and the force between them is 1.0 N. What isu* g1o6r6(t qwluy,b n the magnitude of the second charge?

  Two 1.0-C charges have a0 +aqlx:cul0 d qwkm7yo q(y+9 force between them of 1.0 N. How far apart are they?

  The force between a h+qmt,/i5ur7wi t h2cl;yajs u4- i4z$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.m(y lxmak,5 4 jzk--xk0 cm apart, experience a 1.0-N force. If they ar (zly-xm-54,xkjk k mae moved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first cfs)kqaurtk0x q;v i dz1a15+7 harge is 7s k1r ak 5ixt;+a)0uqzv1qfdat 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 at the origin?

  Three point charges are placed on the x-axis. A ch uw1vz as*r6z3uxnl7 p;ak c68arge 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 10*zk76xap ;3nua rsl 816c wvzu0 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 3olw.o,kyon; 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 m3wly k;.oon o,agnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second pow rrfkx y(cl (-xa gaouruh9*8;9k4z 4int 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 is placed at the lower-left corner?ry;uu-xwkhx8r9 za4c okar*gf((9 4 l

  Q1 = 6.0 nC is at (0/ts8-zwn se w0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What -twsn0/z wse8 is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.xydig5t m *ezob u tt 9-z lrqzruv5r)9-6:)q)30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net for5q-)i g o5t)xt mzutbuqd* - 6zzvy9relr :)r9ce on the 5.0 nC charge?

  Three identical charges of 3.0e +y6aq-l8ev+ev1oj .jaht8 s mC are placed at the vertices of an equilateral triangle which measures 30 cm on l.e+1ja es 6eah qv88to jv+-ya 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. met.sql : 5mo/At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force am: eotl.m/ 5qscting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C cha*sys64qj8 kkf85gkr orge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net forj6o gsy58qs*r8kk f k4ce on it is zero?

  Charge +2q is placed at the origin an, ime-11hx f1 uo;jrcud charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it ,ihufe1xum;jo 11 -rc is zero?

  A copper penny has a mass of 3.0 g. A to)-ie( y )h8i(/bn 1mdnpjvahy tal 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 t/jj -y3qn,y+2pqukt ( c)rcxof a fixed proton some distance above it. How far above the electrokuj,y -q)cx nj/(c +pyr23qttn is the proton?

  Two 0.20-g metal spheres are hung from a common point bld; 08htfnwb7d) f 5bly nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulswht87 05nld flbbf; )dion 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 +4)*yi0cn bj*i 8m yrjg*0e. What is the magnitude of the electric field at a distance of 1.0 **gyjij8m0yr* ncib)m from the nucleus?

  What are the magnitude and direction of the electric fe- u +sefoc73i1nw23 hduxar)ield at a distance of 1.50 m from a 50.0-nC charge?+d-sfe)hen7x21au 3o r c3iwu

  A 5.0-C charge is 10 m from a small test charge. What is thda,cr 4 f/yj *;wvsip-e magnitude of the electrrswcj v/; -,4y fid*paic field at the location of the test charge?

  A 5.0-C charge is 102,ghfa3b* n;.ifk)ptmru-n + wlta / k m from a small test charge. What is the direction of the electric fiitah )m, 2fp+k3* rutg.f; nlakw -b/neld?

  A 5.0-C charge is 10 m from a4n-hqgyoua 0 9iabd 03 small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed 0 ai-u4b0odn93hq ygaat the location of the test charge?

  Two point charges each have a value ,4 :*vvvc/;+k,sjkgn mdr k haof 3.0 C and are separated by a distance of 4.0 m. What is the electric f;hns 4va ,kv,cmr /k:dgv k+j*ield at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark ordxlfw 4wk:-rk 2am1 ,f a meter stick and a -4.0 mC charge is placed at the 50 cm mark. rk lr1: a dxwfm,42w-k What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at t.zdj6 p)zknl l7f-:mm he 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on f:. lnmljkdzp- 7z6)ma line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and --pf / on szdf8sw:9vv-7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at f:f/-dv vo9nsws- 8pz the point midway between them?

  Three 3.0 mC charges are at the three corners of a squal fq o)p z/6c q6-potves7 :fup:9rc(bre of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the censrcl-t7 p::qq(v) z e6oo f6p /fcu9pbter of the square.

  Consider a square which is 1.0 my:. xtmf vz04ytd5 n;e on a side. Charges are placed at the corners of the :;t0d .yty5 4xfzv enmsquare 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 w bhz,ph/j;(8vks/s d vhen it is placed in a uniform electric field. What is the magn d//v ;vhps(,sbzjkh8 itude of this electric field?

  A particle with a chara0 pvb)) l 4e1ab(bt(pijygqyb9k0 y+ ge of 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 field of 6000 N/C gpqdok684)m,t.z rn upointing downward. Wh6 z d8,rpk utm.qgo)4nat 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 nC. The ball is placp:sk 5-8bnnpeed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and dirne:8pn -pbks 5ection of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2a+ m+ajybz tu oxp/(a6s8ye6 ;qcy0n*.0 mC. What is the magnitude of the electric fieln0;e sobx*+6yaac y6 ju(y/q ap+mzt8d 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 the el-8j50 cth +s ja0bue g3uwqy)lectric field 6.0 cm from the cent 80+b jcguqje5ya-us)30l htwer of the sphere?