State the law of conservation of ele )bnnw+g9jj436twle n fv8t0vctric charge.

  Is it possible for two negative chargek2 rwj a.f2w7fs to attract each other?

  Is it possible for a positive and qd )yai:5rye /a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the g/r3 avy 7;+mo6x *wwvw8yfl2w/b0yu yfuk0fi lass rod acquires a positive+ yufw8a0/*iy k/3bmuf ;r6 w20ylv7wowf yxv charge and the silk

  A proton carries a

  The model of the atom showscq,4 x7fuh jf9 ao8l vfu )ufmc2j-(l2*odp/s a

  A neutral atom always hasrq --.dpyv . wmsw+;xi6vf4fd

  An atom has more elecpc ilccy 0qc42 rz 0c:sq9/p0ztrons than protons. The atom is

  Materials in which the eljrm n rz+pd2p931s.oeectrons are bound very tightly to the nuclei are referred tzjo29rr 1+nsepdm 3 p.o as

  Materials in which the electrons are bound vlcfmh6 f856yy ery loosely to the nuclei and can movm6f5hl yf86yc e about freely within the material are referred to as

  A negatively charged rod is/ty4ttmeq*7 ps dfl+) l:vyr0 brought near one end of an uncharged metal bar. The end of the metal bar fartt0m7q4/+t: ryed s*ftylv) lp hest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutramnhyl wz*0q.:ovv g,*l. They are placed near each other on an insulated table. Sphere B is briefly touh*0mn,z:v w. ov *ygqlched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an 2d,u6fe ,esebr6i5 rbelectroscope positively?

  An originally neutral electroscope is briefly touched with a positively ch s6jjd/lirb41arged glass rod. The/bd4i6rs1l jj electroscope

  An originally neutral electrosc4tl.dzn0o*;al mo4xel 5. b01en zhxcope is grounded briefly while a positively charged glass rod is held near it. After the0co .obxm0 nx;4 5 lzn4*l1h.etlze da glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. Thenhz 2,h-laeg5j/ee+dq a negative object q +ee/,25lz-hdhgjae is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatedl0ca c ) -aa-llbl6,rd 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 rc d-lala0lc6a)lb-, 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 oz7ap/1 yn0skyu *v)sconstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charcddo(gehdc4z+rnx(*lab 8h:m 8beil 682x ) o ge is larger in magnitude than the secoxbdob6 o (d88nier4+h lgcmel8xcd*)2 a:zh(nd charge.

  Sphere A carries a net charge and sphere B is neutral. They arepu8o aqj29q:*9irz ra placed near each other on an insulated table. Which statement iqqa:a9 89rruo* z2j pbest describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges onx-of uswmspk;6ps0 61balx :0 both objecuao0 ;pwlbxsxs6m 1s6-:0fk pts are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces of xy)3yr zgrm9.F on each other. If the charges are separatz9r3) . yyrxmged by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the forc(6yivzp.-yx f1jvp 1c-skjms, -ks6ve between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced p(v yp1. s jmxjk-ss 1-yk6,6ic-zvvfto one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a di/a e:/m9 jdbvv /zr6r(ncube 0stance 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 elec 6abn/:/jcdv(err9/vz 0mu eb tron?

  An electron and a proton are separated by a distance of 1.0 m. What happens/0q iocjd 56vi6b txa- to the magnitude of the force on the first elecqoi/50v6 i6b adxt-cj tron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of b2n7s u+kzn6su/wz 5 v1.0 m. What happens to the size of the force on the proton if the electron72uuswsnkz6 n+ /zb5v is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a shy xr1dz/ 3f.bhvx6k *econd 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 the3br.xk/dz1vx y 6fhh* 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 place; . +3-.cn1nivtyts ggw q/efhd at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an elec1wcggie./n-ttqn ys h3.fv; +trostatic 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 ve1q+7n9lg vramctor?

  At twice the distance (3g:,l1ucl+ nd nu;yeij+ jaa from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and poode+3 n8 hh3x3 5shytxsitive3 ntxe8y 5ho3s+3hhxd charge along the line joining the two charges?

  Is it possible to have a zero electric fieljt0ah8)* fpa ud value between two positive charges along the line joining tha)jtpua 0 *8fhe two charges?

  Electric field lines near psitive poi+0* khy8vf2bn 1lhc kknt charges

  The electric field shoeo/ux(qsmq 5/jl5 1lt wn

  Can electric field lines inc53edum . x4tbtersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform ele2zhxix6o6 ap.8 kr 8luoe,(sgfi;rf 6 l4b7atctric field. Give a statement concerning the electric field in the block's o(8g7 4hx2if krepofszbx,ra8 66i 6lu ;.talinterior.

  If a solid metal sphere and a hollow metal sphere of equal diamete-e) /krwek4gnrs are each given the same charge, the electric r w 4n)k-ek/egfield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tap ;h1w nhx zw3x1:6cf 9v9fus pl/ewv1ble in a region where a uniform electric field is dex v f u :1lh1 x3;fwn/cwzp9v1pw69hsirected straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is inmo,zhvr7,t(g ;* uu( pdzt6 lh electrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a ho ikp4xx8p) v.gy 2.x)i*znidu llow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere)2zin vdxgyuxp ) .ipk*8xi4. has

State three properties of conductors in static equilibeapa28bhl 8d (7u (tw:sz8usbrium.

State Gauss's law.

  The charge carried by oii+zh. +-iu obne electron 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 than elehffngr1p) v *)ctrons doep*rgnvf h))f1 s this piece of plastic have?

  What is the charge on 1 fo:i e+l )m-+1hfvbm tkg of protons?

  An atomic nucleus has a u5f,ent xc: k,j:tlr3 charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separateic csujks1 i(w ,(e/w5d by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between thew , cie(w5/s jsi(kcu1m?

  A 1.0-C charge is 15 m from a second charge, and the forc1rb+;) nqqe*csb i6hse between them is 1.0 N. What is the;b)si+qhb*cqr6 s ne1 magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart : :o7zwxz*n qplwca2fw4d m ev ;o207fare they?

  The force between a y 0htse j+p)t/qug 35qvpw5f8$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initiallockm-hw jr 7w5d *(d g7e1kx;ny 2.0 cm apart, experience a 1.0-N force. If they are moved k(;c71w-m dw*d nj5kxer h7ogto a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are plac:) 4j5po p(y8p3uljhnfyr4 g sed 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 at4spj ul3fhyo 8ygj5(4pp: n) r the origin?

  Three point charges are placed on t e,w+s nju;/l8 .rdn ba3heuq5he x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, an+s nuej.eahr3unq,l8wb5 /d ;d +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 = 2.00 mCq ca+9,j7v1byql 6 efvy (g8j9rbcsp3 at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 mbvcy91q3 c8 +gj 6vb,qjp eyf9 asl7(r. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a sq3 dxr-f3 bqmo2uare, and a second point charm- b ox3d3fr2qge 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?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at 1lme*6c gi18;j rs qht(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the ma csmei18jrg 6qh*t 1l;gnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC na;1vc:sg4zck + j8ti is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on a tjsc14;gi z :8nc+kvthe 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilattx:g ooqn64g7) f 9adteral triangle which measures 30 cm on a side. What is the magnitude q67gdna9 xtt4f:go)oof the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q 7w 5r xb*hujje w.,;1p2wi2fp kxb5hm and +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 that the electrostatic force acpx*w. e;5bkfxpju2wwi r hmhj2517 ,bting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 6fvm-e8g2a sw 4.0 m. Where on the x-axis can a third charge be placed so the net8a2 fsvw-6 mge force on it is zero?

  Charge +2q is placed at the orsvh 4ulk4.e3d n 2v8oowv bt)(igin and charge -q is placed at x = 2a. Where can a third positive charw 8vosn4ku ho4d.v ( belv)23tge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0nb36 fzdrnp6 *hu09tv*q t5ai 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 against the force of gravitpx*l liz4e5 zc x)6h ob2nz2+tg)6hd xy by the attraction of a fixed proton some distance above it. How far abovez2bl2i nzel gp c+hz hx )6xx45)6tdo* the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by (sgeyqr*v0ltg n1*.1bc xniyj,d7y9nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces t( lg0y1y *b7t ge*.nrc 9qsyxv di,j1nhem 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 +40e(ua( g-gu2 jbfr)7* dxmd) caj. What is the magnitude of the electric field at a distancedju *2(d)fu7ra(j g)a xgcb m- of 1.0 m from the nucleus?

  What are the magnitude and direction of the ec,)oogaif7ig xl j umhx4l3 h4x**/-electric field at a distance of 1.50h- ) l4* xxucixghal3eo g/o*f ,ijm47 m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a smlj+qaqa;l8anhf ve8;8nd0v9all test charge. What is the magnitude of the electric field ;+ 8hd8 vlj0ev9qaana8l; fq nat the location of the test charge?

  A 5.0-C charge is 10 m from a smal2dy )dms w(x4prn(zujqr7,i+l test charge. What is the direction of the electric 7d zs,p)d((quxm4jrr+n yi 2w field?

  A 5.0-C charge is 10 m from a small test chargex3- vct miog. (cw0;zh. What is the magnitude of the force experienced b(w o.v zxi0c g;m3t-chy a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a disu72qz g0mz .w w,jclg5tance of 4.0 m. What is the electric field at a point midway between the two chaljw.u5zc 2 qgm0gz7w ,rges?

  A 5.0-mC charge is placed at the 0 c+ um4ot7jzc( ,v*id lwm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What isc tjwl7 diouz ,4m+*v( the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at d 4 dm-lej1a+athe 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 cha4-je 1+aadd lmrges is the electric field zero?

  Two point charges of +3.0 mC lei1cxg,tc:29fo b. )mld)w lln:;u wand -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at themlt.cnol9c:f xedlwg, wi1u ) 2): l;b point midway between them?

  Three 3.0 mC charges are at thend38yxkp/2 py mk0 t.k 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 of the squ.ypnt8m3xdk 2pkky/0 are.

  Consider a square which is 1.0 m on a side. Charges are placed at tr s0ea5csey; a8vrq+.m;;uglt, b uy:he corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 m;:ussq;cerryu + m 8tyaba.e lv 0;g5,C 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 ele:o*gwgbq / ;rc)p 46yal)rhbyctric field. What is the ;hwrop b/qy*))64cyg:rbg la magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass v8p lc5kce-3 jof $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is plaukozqrza(z /./;ax4 ql z0u(e ced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to0zrxkaz q (a z4le/qu/;.z( uo be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.qat05ukk1g6 e00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of65 aeug q1tk0k 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. ibav+s:zl 1w jcu58g- 9vex(uf3e*sa What is the magnitude of the el -1vu:vle5e *+u3f9c basjsiwz8(agx ectric field 5.0 cm from the sphere's surface?

  A metal sphere of radi 7.zgj z szvaxn**ifz:;n:fv+us 2.0 cm carries a charge of 3.0 mC. What is the electricz+nsnfvfzi a* z;j.:g v*7z:x field 6.0 cm from the center of the sphere?