State the law of conservation of *4t 0 *p tgneo,91p:rozkdiwdelectric charge.

  Is it possible for two negative charges to attract each o;lgj;br +37h xe(v cudther?

  Is it possible for a positive and a negativzql5)k;wj 1cxe charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the prox:4cm-nah 3mu );: omzkd +bejcess the glass rod acquires a positive charge and th: md+ )obz makc3h4ujxe ;-:nme silk

  A proton carries a

  The model of the atom shows amf-+e; f9avrv

  A neutral atom always 8 i,1/yazq ffd)dclf;.8uxpx has

  An atom has more electrons than protons. Theca. mfg0v ana c1;5); . zdfbh6xcjuu6 atom is

  Materials in which the electrons arrb4*j3o gneu0 e bound very tightly to the nuclei are referred tor34bg0e*o jnu as

  Materials in which the electrons are bound ve hoe jg9f7(wa,ry loosely to the nuclei and can move about freely within the material are referred to a faohj(e,gw97 s

  A negatively charged rod is brought near one end of an uncharged mel s) be/e e0wjm/cg;4mtal bar. The end of the metal bar farthest frl /jmegbcs e0;)w4me/om the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are place57pyifd8 z8( -x axrhcd near each other on an insulated table. Sphere B isxhid5yc-zp8f a 7(rx8 briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positi) y.8gk;i c*j nug,hcrvely?

  An originally neutral electroscope is briefly t+w qxk xq6h :mph y(6bqgih-cg *6i.5bouched with a positively charged glass rod. The electroscopehyq *56w:bx 6 (q+hhbqi-k6picgm .gx

  An originally neutral electro.) m*mq pbwa5sscope is grounded briefly while a positively charged glass rod is held near it. Aftm.sapb ) 5mq*wer the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepal2;i3zhzw3p n ,kyo f(cfv.i:rate. Then a negative object is brought near the electroscope,fz,.(co;p33yhi wilnk :v2zf but does not touch it. What happens to the leaves?

  A large negatively charged object is placn ufry- lib17cq,/ 2gied on an insulated table. A neutral metallic fyr1 g/c7l i,qnb2i-uball 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 final charge on each ball?

  Charge is

  What are the units ohshlx*7;1eg df the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distan j8zt+zmjqj 34ce d. The first charge is larger in mag j34 zmzq+j8jtnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They ar( xum8 u ;v*xdfla4bb.e placed near each other on an insulated table. m 8 v;.bubx*fad4ulx( Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a xk xp-0e;/le ecertain force. If the charges on both objects are doubled xp0;eek le-x/with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attran c0vi bwyqg6(4q6iw 5ctive forces of F on each oth5 (66ni0 i 4gwwcbvqyqer. 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 force Fh3k.adks gl**. What happens to the force between them if one charge is doubled, the other *l d*as3k.hgkcharge 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 protonvaq5f33bh zc0crc +,a are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second elechq 3bvc0zafrc ,3+ 5actron is placed next to the first electron?

  An electron and a prow y+zut*l *fd;c l;*hyton are separated by a distance of 1.0 m. What happens to the magnitudeu tz*wl*c+y;l dfy*; h of the force 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 1.0a+ l yd4q6pze0 m. What happens to the size of the force on the pro 0z6yl4d +qepaton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squar ;yalm5al6qvnn6gf q6:v6lx4 e. 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 are placed at the other three corners of the square. What is the magnitude of the a6y6 gvx6vl q54fmn ;n qla:l6net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of cpr /2g1rfkn7 71huhdl3x u n4an equilateral triangle. 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.4 nlxcr17huu 1hkf/g p3 7nr2d 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 la*z gzdy0::e ppw8 /vnot a vector?

  At twice the distance fzaehxpff .2qn007 5(v 0xyzvlrom a point charge, the strength of the electric field

  Is it possible to havix* 5ggo ra)h)n 9 tov70jnjz9e a zero electric field value between a negative and positive charge along the line joiningz95n*97j v)aorti hxn jg0g)o the two charges?

  Is it possible to have a zero electric field value between t2h 2 zma,;y(np,sfmsuwo positive charges along the line joining the twyhuz, mm (pns,;a2f2 so charges?

  Electric field lines near psitive x(*ou1v t c5//dj:sbbtvkkg y.lt0j(point charges

  The electric field showvnxa2o(6 vy2,m/la3w;sjj fe n

  Can electric field lines intersect /5 yjme b.l qdzc(m0v.in free space?

  A solid block of metal in electrostatic equilibrium is ptl . 0uryei0dh/+/4pe d6bkxs laced in a uniform electric field. Give a statement concerning the electric field in the t //i. xpydsdlh0k0+e urb 64eblock's interior.

  If a solid metal sphere and a hollow metal sphere of equal dia l p3+3h2zsb, eut(vbdmeters are each given the same charge, the electric field (E) midway between the center and the surfa(p3bt3+se,u 2z b vldhce is

  A cubic block of aluminum rests on a wood ;wrfi2 .*pgwr kqnxplwth7ze9). -.een table in a region where a uniform electric field is directed straight upward. What can be said concerning e.9z*w;f pwn 7r.k2iwe-) plrxtgh.q the charge on the block's top surface?

  If a conductor is in electrostatic equilib wy*qw(4w eei7rium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that ,m 3s vjziew,dwc+l cq7g9* 0qis grounded. As compared to the case without the hollow sphere,3v,s7c,e wlc0*iw+9 zdg j qmq the electric field at a point directly above the hollow sphere has

State three properties of condw+ z g6ih,shjpwu 3+p(uctors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is 9wq l6hehn4m( $e = -1.6 \times 10^{-19} \; C$. 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. +vv (z3 r7aed fbz4nt**cg r0bHow many more protons than electrons does this pie*zge(fnr+ b az43b*d7c0 tvvr ce of plastic have?

  What is the charge on 1 kg kr rimt v2t r )6ow4b3rlj)uic6gr/34of protons?

  An atomic nucleus hasa4t*/w q xp)g-w as9e1ok4bnq a 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.sk 6yet7 +im2zoenuyj( 8 -e(0cj-g sm5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between thymenee 8 u-sio+jzmt2y(g60 js k7-( cem?

  A 1.0-C charge is 15 m from 8. ,)svhaft q72wva lha second charge, and the force between them is 1.0 N. What is the magnitude of the sevw vhla. a,f)827htsq cond charge?

  Two 1.0-C charges have ;0)54bgzah : 6kuniarxn - kfya force between them of 1.0 N. How far apart are they?

  The force between a eq72iml1gpf c(mkp(5)( s jex$30 \; mC$ 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 they arh4:;tsbi3er1r c(vsk) ,rpiwe moved to a new separation of 8.0 cm, what is the electric force bv(i)4;,ck s1 w3restirh :rpbetween them?

  Three identical point charges of 2.0 mC are0pw8 8mo 544uuqebnje 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 u4bjm 8e45 wnu0pqe8othe magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axioui f8y8ay g dl8fr3)+s. A charge 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 charge at the o ui3ya r8+ o)g8dfyl8frigin?

  Three point charges are locwh/6zsie5 s k4 cm)s;vated 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 = -1s;s w)kc54smz/ e v6hi.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center ofe).(5i pjtg .hlvqx5v 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 positive charge at the center. What is the magnitude of the force that acts on the center charge if a third chargep5j( i.vl gt5ve).hq x 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 yws2ojn/7o9) k1f lyv = 5.0 nC is at (0, 0). What is the mag1 j7kyv nf 2loswo9/)ynitude 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 (0, 0.10 m); Q3 rdrsqy11 88cr .xew6,g b7.mq apvr8k= 5.0 nC is at (0, 0). What is t1s8cp 1agrq 8 ryq.,.x6 d7krwm v8erbhe direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an eq so smok6:2 6xu)2myble/h 6dzzg-vo2uilateral triangle which measures 30 cmss o22 zel)mbk/: v6x6y6ug2m-dz oo h on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charg wcj*g,e7z.0hj d8nmzes of +Q 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 acting on it wou gzj7.cemz n,j h8*w0dld be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. 6+kzkht8ph3 c 6 5 l oruf,ryb65ec1gp8dez/g Where on the x-axis can a third charge be placed so the net force on it ipg5h 6kr e8db+35g hzcfyc, l6ptz1 ouekr6 8/s zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where can a7vvtr:a0zdy s30b2j a third positive charge +q be placed so that the force on a7 vva:b30 02jrdty zsit is zero?

  A copper penny has a mass of 3.0d)xzfq(/f18 u r (wmrw 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 gravity by the attrac :;g aggir,a4.0zg7.yogpv uhtion of a fixed proton some distance aboveag,g yigu4.zh.o gag07p ;v r: it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductingrbk,s*.n9y50+rknroum 2us g 7l mz8 k threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle be yg+u9k.kkmln m, r 2s*n70orrbsz58utween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. Wqh8s zx 9(ji;khat is the magnitude of the electric field at a distance of 1.0 m from the nucleuxjis9( 8 hqz;ks?

  What are the magnitude and direction of the electric field at a distanco g44u95chbzke of 1.50 m from 9 5kc4 oghub4za 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of th +q3(kd7;wkxjb7pnq se electric field at the location of the test charge7xk+spj7n(;d 3qkb w q?

  A 5.0-C charge is 10 m from a small test charge.oug sv 9lfc59:swv68 e What is the direction of the electric fiegvw9 ol85cv eufs 9:6sld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the h)k8fgwp)pb ga 7v0yw8p4pl r1r8* n ;-fw xmfforce experiencekgb1pvp 8*) nyrf8r hwppxlf0a m84w7w;-)gfd by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each hatbqu c8g7v)h sv3n3i0ve a value of 3.0 C and are separated by a distance of 4.0 m. What is the eshvc03 b7vt i3gqu 8n)lectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 ug6 g4kwv)j; acm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electriak;6wgv)jgu4 c field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm m4ga14/ml2 j+xjmct ug1qxsu1 ark 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 elsa+2jujx gm4 /ctmlu 1gq 411xectric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. 6huexfd1nu uvw,*t9 , What is the magnitude of the electric field at the point midway betw,u6 eh 9vnt w*f1ud,xueen them?

  Three 3.0 mC charges are at the three corners of a squa8uo,fnamweomo 26 i s si.a-:d)cj5*lre of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the52:*6 8omw sa-m,i udjefs)cnl io.ao electric field at the center of the square.

  Consider a square whi)7zs, arymlo /ch is 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0)yoam7sr,z) l/; +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 it is placed in kdq)d. z1)n:6vdr x csrqb,5f a uniform electric field. What is the magnitude :b ksrq5zq,fr))d x.1d vdc6n of this electric field?

  A particle with a charge of 4.0 mC has g :400 z)sko/vlcfyov 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 el3z o9v3qcqsch i4g6(cectric field of 6000 N/C pointing downward. What charge must be placed on the ball for it t zcc 6v39s(gqc4iqh3 oo be suspended?

  A foam ball of mass 0.150 g carries a charfu:46 e*3 qpho)usy(nhqzo0:dp/w zx ge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agains( z)qo* usf6xp0d:eoh/: pyhzun 43qwt 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 )nlume(4 ug 1z22k40mknkpz *t0mlme +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's suk4mn ( 4lkmtnuue0e12mp2k lz)gz0* mrface?

  A metal sphere of radius 2.0 cm carrie0m+cvi k8yl(x;q v(ses a charge of 3.0 mC. What is the electric field 6.0 cm from the cen vv klxi( ;8ms+(ycq0eter of the sphere?