State the law of con5/etue)t1ai, rbj; )gnum p1aservation of electric charge.

  Is it possible for two negative charges to a7jmhcg-s er(e 09t d+ittract each other?

  Is it possible for a positive and a negative charge to attract each other?quwyi7/, i+e;gp .gqe

  A glass rod is rubbed with a piece of silk. Durc-x 6eead/1wumfhk)nh8q+ r ;ing the process the glass rod acquires a positira8e+hweu nf1; x6mh)k-c/dq ve charge and the silk

  A proton carries a

  The model of the atom showi9sgbk4 ,zse1 s a

  A neutral atom alwayr6888/isjxzhe,h 5to; rbodes has

  An atom has more electrons than prt n;-zwdlp -9uotons. The atom is

  Materials in which the electrons are bound very tightly to the vthf6y m 74xvsi, +0lfl .b2ftnuclei are referre b 6mllx+tsyitfvffv2,h4 0 .7d to as

  Materials in which the electrons are bound very loosely to tkq3 s 2q gd*/kzh,s2brh 5nv;mhe nuclei and can move about freely q2nbksz 2h3mv s,5* qd/hrk g;within the material are referred to as

  A negatively charged rod is brought near one end of an uniq3 xfpzcl)n.uwfp-* 0fu/s + charged metal bar. The end is.pf u) -pw0+fn*xf/3qu zlcof the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is docf3)hfwjg7xj *9( vn4sj5s neutral. They are placed near each other on an insulated table. Spng(j fws c7xv)oj 5hsd*3j94 fhere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargevs rzo6ip5- t*mnt y6(d rod charge an electroscope positively?

  An originally neutral electroscope sp 9w)9/*j4,or d xhusf)pzo d/mbw(r is briefly touched with a positively charged glass ror)mspdw(j)z d po/uhr4s,fo9* wx 9/bd. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chawfa ::mj*e ewb8.wa,j rged glass rod is held near it. Awef:j, jm8a*:.weaw bfter the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and tbr )e/oh2). shqpwb,bfg h8k8 he leaves separate. Then a negative /ho 8fr,pb 8qsghh )b2w kb.)eobject is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on vga ownz/dfnt6p*4o41a i(6ynpd99ww 7- lyd an insulated 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 ba p w niyw7oo p9(zvt6-wy4ld19a6nd a/4fd*ngll, 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 confw(, pco(xm80h/se vo: (uru gstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by aq; ;(cvbqfuun z)*qibd(cjkl;; b a-+ distance d. The first charge is larger in magnitude than fqv;z+uncd)(bq a* ;(;lb bu;q-kcji the second charge.

  Sphere A carries a net charge and sphere B is neutral:s kunhy46p:lw 3 ov42x fz9tf. They are placed near each otxw:v 4 642f:tp9kz hofyn s3ulher on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a cera 9j1lx k-q3mtk)aow4tain force. If the charges on both objects are doubled wi-94o)1taj3m qx awl kkth no change in separation, the force between them

  Two charges are separated by a distance2z okaw6md4jy3m0c )i d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, 0 yw6 mkaoic3)zmdj24what are the new mutual forces?

  Two charged objects attract each other with a force F. Wh is80xjgs+b9 q e7lv0tat happens to the force between them if one charge is doubled, the other charge is tripled, and the separaib e09ssg80j+lx q7vttion 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 1.0 m.e. 9sts)dfi z+ What happens to the magnitude of the force on the proton if a second electron is placed next to the firstd.zi)+et sfs9 electron?

  An electron and a proton are separated by a distancwkrccyx19 bug/ )7ylmy:3+ mee of 1.0 m. What happens to the magnitude of the force on the first electrlu:+/ccrg79kym1 x)my e wyb3on if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance f u;0mds :;h dacbz)q1of 1.0 m. What happens to the size of the force on the p 1hs );ducm0;:aqbzfdroton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q isaxu5m6 :-uta w placed 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 :u uatmax56w- 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 plavwc9ju4 h8eads sn+ ( 1b9q9jeced at the centroid of an equilateral triangle. When a second charge of +Q is placed at 1j v9+s8j9beh9sducawq 4 ne(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 center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a if -:zip8pgc 1m37de pvector?

  At twice the distanceq b;b kp79s9q;q rxmf23*bxgk *j q*mm from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and positim w3eoc; +d,bhve charge along the dowhme+,b ;3cline joining the two charges?

  Is it possible to hav iqvm ea* 0go549)kcsoe a zero electric field value between two positive charges along the line joining the two char9 o0kq)* aoieg45vmscges?

  Electric field lines near 2zs tu8dfh85*( 5rcc etjh.bd psitive point charges

  The electric field showna 1o pdbv20b.i;nltna vj/,o;

  Can electric field lint8ec7s z4 lg/urew.a7es intersect in free space?

  A solid block of metal in elecms7 p k5n)ugsf,i8 7j i uz1tffqt/f75trostatic equilibrium is placed in a uniform electf7ut gf8im7 fszj,k 5fsp 5ui/ t1n7)qric field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hol8 0 jdiiubu6y4efs)c +low metal sphere of equal diameters are each given the same charge, the electric field (i+04j uf6de bcsy )iu8E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tal440z;uif)v m jnd 8mkble in a region where a uniform electric field is directed straight upward. What can be said concerning theu dj0vmm8 );4i 4lfzkn charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near anufap in (l40 z;3s6gel electric charge

  A positive point charge is enclos66rgvtd h( em+de pwr5 2b/.wned in a hollow metallic sphere that is grounded. w6(r. ebmnh/g6e r+v 2ddpt 5wAs compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conduc rtb 9v2rpskxv1 g8t75tors in static equilibrium.

State Gauss's law.

  The charge carried by one elecg,0igrx joaa, *pm7qg.fw0, htron 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 bvc e-eqy 9i17 d0hkr3more protons than elei1ed9bk0 v7 e -qy3rhcctrons does this piece of plastic have?

  What is the charge on 1 nnn2( e+t8iptkg of protons?

  An atomic nucleus has a chae x(9yekmn e30rge 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 valu,f (v(i0sizwces of 2.0 and -4.0 mC, respectivel, vi0(fsc(zwi y. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge,:xqbtztg k u,+xh v.gco2++r9n9e-c*tkva 6c and the force between them is 1.0 N. What is the magnitude of the second chargvq2zhkt rn , au-tc ox:9bc6+x+t9+e cggvk.* e?

  Two 1.0-C charges have a forpdqk 2oye maz* 0f x(wv/*j;l7ce between them of 1.0 N. How far apart are they?

  The force between a qogwz6p2/mff q :i ,y+$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initial5+qj e(js,mde ly 2.0 cm apart, experience a 1.0-N force. If they arj+e em,s (q5jde 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 f1l97c xfb mo/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 m9x 7f olcfb1/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 of +2.0 mC isy9ddf :jtp-gppan :vse k 7iv6qpf4 qf1v4/-/ placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the f4p4spgi-6fpvd a 1q djf/ ::y7epvn /k9 -vtq100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges ar nkc3pz23bbq+iw7 u( ae located at 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 magnitude of the force on the 3.00-w 73cp+nbkaqub3( 2zi mC charge?

  A point charge of +Q is pl0: ovyy2q+ z7pm2e- q 8kjlzpiaced at the center of a square, and a second point charge of -Q is placed at the upper-lefl vzy+pk-j2 qy : 7280qomzpiet 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 (0.30a8p-z hm ;tm:v)l7r ejtxv/ v6 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatv)e:jat6/7mtl rz8v mvh-;xp is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at 1pn0 5lylixx8)kcz:b (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nCly)lbx0 c kp85zx: ni1 charge?

  Three identical charges of 3.0 mC are placed at the vertices of anqw/zoyvkr1v bo b)7. sl e:-l*3u,nim equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrost *s:vw i7 .rblm)eoy 3vl,zub/1-k qonatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separate+ -9 hme dw6l:,*pfm/ycwys gdd by 3.0 m. At what point, on a line between the two charges, wouldmdm6cdwyyhf+ sw,/gp* 9e :-l 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 ajn u1/brx4 a yah13cc)nd 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 on iau)1cbh/ rjc1xy 3n 4at is zero?

  Charge +2q is placed at the origin and charge -q is placed at x 8(lt,8 bjw( g iqsfdo/= 2a. Where can a third positive charge +q be placed so that the force on it is(, tifo8/ wjs lb8dgq( zero?

  A copper penny has a mass of 3.0 g. A te 5s v.qqj93/fy 9rydmotal 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 x2xalxhf/3m f:0vhf*the force of gravity by the attraction of a fixed proton some distance above it. How far a:f3mv 2f*lhx0/ axhfxbove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threonu*y 7w)np w +sdl-0oads which are 30 cm long. Both are gdpyow wn)u-0+o7l*n s iven 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 +40e. What is1sh4nh ,bk* yo)sul20hj(vt x the magnitude of the electric field at a distance of 1.0 m from the nuk1thnh b4y 2hs () xls0vo*,jucleus?

  What are the magnitu0eb8)mwc4rz s de and direction of the electric field at a distance of 1.50 m from a 50.0-nC emz sbcwr084) charge?

  A 5.0-C charge is 10 m from a small test charge. What is7;*.uzix9m9q mntk a hcj.p x. the magnitude of the electric field atxac;qj7*z pmh9.ximuk.t n9. the location of the test charge?

  A 5.0-C charge is 10 m from a smallw-mjp+3 yrho ; test charge. What is the direction of the electric w;o h+3jpmyr- field?

  A 5.0-C charge is 10 m fro))cw pbt:dx)jg6xofom1lp7 /m a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the locationx7b owgdt)1) :x)pj6 pflmo /c of the test charge?

  Two point charges each have a val/apn 5rsq7c egkm3d9/ue of 3.0 C and are separated by a distance of 4.0 m. What irc/g5dkn sep93 q /ma7s the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark ok 9ro;(qzk z0of a meter stick and a -4.0 mC charge is placed at the z;q(zr9 k 0koo50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed t lych-g*;e:d at the 0 cm mark of a meter stick and a -4.0 mC charge*:hcdt y;le-g is placed at the 50 cm 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 x = 0 and x = 0.208r +tf52kh 8st df3erge/og,i m. What is the magnitude of the electric field at the point midwarg 2/rtgedisf8 hk,+3 8tof 5ey between them?

  Three 3.0 mC charges are at the three corn(4d/f8sbk e tjers of a square of side 0.50 m. The last corner is occupied by a -3(/dj b fkt84es.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges zg)xj t8k*m,q1 jd5 veare placed at the corners of the square as fdq1v j 5k8xetmz ,gj*)ollows: +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 -fe:rg+imywi-v)2k/v vnl b(it is placed in a uniform electric field. What is the magnitude of this electric fyr:w( vvk)b-lve g2/-mi +nifield?

  A particle with a charge of 4.0h9f+aeexue szxrqy1 z-a (7 (; 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 :0eil-jdt e/ jm3qv8x N/C pointing downward. What charge mut8iqj:v/mx-0e3e jld st 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 balhtn 7 zealow)r4:p-r2oia nbp; v/79ll is placed inside a uniform el4 z nnle7tp- ; 2r9i:ho/av ao7)wrplbectric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chav(6-dbecabq 3z2md5oz qno -:rge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surface?- abv(z o2dnqc m-e :zq6bo3d5

  A metal sphere of radius 2.0 cm car xyjxt2y, 6c0cries a charge of 3.0 mC. What is the electric field 6.0 cm from t0 txyj6xy, 2cche center of the sphere?