State the law of conservgfw-; p;a ul7jation of electric charge.

  Is it possible for two negative cuo k2ldgky jg7 1 +/hho:(kka0harges to attract each other?

  Is it possible for a positive and a negative c8- 1tgpv xwnj9harge to attract each other?

  A glass rod is rubbed with a piece of silk. During the p)(iz*e 81u5nal jw ;elp7kvlk rocess the glass rod acqjzl awpk( 857lek;elv*) 1 uinuires a positive charge and the silk

  A proton carries a

  The model of the atom6j 1eaoti m jy2o yn/ywo:4+(e shows a

  A neutral atom always hae aag+a23wnim (*9vdsox( ya -s

  An atom has more electrons than protons. The atom. hk)3qj(i1.ybv i:oie:d gal lfx(x8 is

  Materials in which the electrons are wp7qorv 0y3 lksf5,qku+u vzn:h x 9.mb+k27nbound very tightly to the nuclei are referred ts xyzq+ h3 7rw pvk2,bul+nnmuf 9kov 7.q50k:o as

  Materials in which the 2m9f yrxf- .v3fh, ,ygum0guselectrons are bound very loosely to the nuclei and can move about freely wit 2-mgf3y9gru sy,0,h .mffxuvhin the material are referred to as

  A negatively charged rod is brought near one end of an unchar6uh,lv( (1ji gdac;ojged metal bar. The end of the meu; lh(6gojjda ,ic1v(tal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. T)hyh5heig mr-w9.i t;bl.xmk 7 k.k z/hey are placed near eachike.. m5k x.ihzhm-/wy; rhg9l)t7 bk other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope 8gj: go7;rtp(lz5 fcc positively?

  An originally neutral electroscope is briefly touched with a positively charc5, )8egvmou-sp 6mib(dc7zr ged s8eu,g(di 6obp5zcc-rm )mv 7glass rod. The electroscope

  An originally neutral electroscope is grounded briefly w(xqc5)eof3 v3 t)lwf while a positively charged glass rod is held near it. After the glass rod is removed, the wv) lt5cff) wq3(e3oxelectroscope

  A positive object touches a neutral electroscope, and thekk0cd1bl i u)- leaves separate. Then a negative object is brought nelc)10kuib dk- ar the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is wxr r i)3u(:: mntcpp3gtc-r(placed on 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 ball, and stops. The first ball rolls forward, but does not touch the negative object. tw:u(ct)-r: g3x nprmp3 r (icAt 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 Coul bv 5sel3th*2l4tod x:omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first9 z .r(pjfjm5 d dts/q3p.q5tw charge is larger in ma( 9mspz3d /qjdt.. w5fj5rp tqgnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are pla/to8rc a*2d elced near each other on an insulated taol edtc8/2r* able. Which statement best describes the electrostatic force between them?

  Two charged objects atzj-0gvkh0zo:1 pwse 1v z8y3 ftract each other with a certain force. If the charges on both objects are doub-vz:y08s1h0 e31zwvgkjz fo p led with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fo;1wcsq 1raj hay7q 9 zrew4oixv5 20r+rces of F on each other. If the charges are separated by aq57hers1aj w4o2;qryc9r w0+xa1 vzi distance of d/3, what are the new mutual forces?

  Two charged objects attract each o,e 5/krs2n uieq ymg0)ther with a force F. What happens to the force between them if one charge is doubled, the other charge is tmr5syu i0ne2gkeq/,)ripled, 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 projtm qqmm h(- onqcfe7.+(8i6kz). wugton are separated by a distance of 1.0 m. What happens to the magn+q .i( tfhg z kcmem-uo qm).6qwj7(8nitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a disa(2/ 5zs sgww8lrv 4mstance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron isw25(zgrw l m8a/vss s4 placed next to the proton?

  An electron and a protonf 6m 0;krs35d7 yklwzr7z0tja are separated by a distance of 1.0 m. What happens to the size of the force on the proton if jmt6 kls 7drz0kzf307r wy5;athe electron is moved 0.50 m closer to the proton?

  A point charge of +Q is place2 u-+ m.:r0jsf/nk wpn8hqc;.kagrned 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 ar ;jfs0 wprqn/ rknu:+.8k.geca-m2hn e 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 placed at the centroid of an equilateral tria:h;ef6wao m d1d)+bmhew+ c:vngle. 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 acts on the center charge due to a thirv :)m: +h6abofm dc+e 1;ewdhwd charge of +Q placed at one of the other vertices?

  Which of the following 97z zq*s tqgyzs z;4k7is not a vector?

  At twice the distance from a point charge, the strength of the elc-)kmob ::kstqzt4 0tectric field

  Is it possible to have a zero electriee v5 b::s/ bw)k u09ykjussjm6la0+5r,vhu bc field value between a negative and positive charge along the line join uws ,bks+5v)j9yuavu:k:/ b50rej slh6mbe0ing the two charges?

  Is it possible to have a zero eley :e.7a(, /m8 rsd)bapl dufwaqcd.u 9ctric field value between two positive charges along the line joining themdda8asp9eu) ub.yf. l(rq, c:/7dw a two charges?

  Electric field lines near psbe28 0sz+jdet8c7mq l itive point charges

  The electric field showna i n e2ftuhak ):/wqf ehwuw)77w0u))

  Can electric field lines intersect ir4 ghe+4zh j blbzbwl64m)0c8n free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elec,0vzc wdnk kb;w,//tdtric field. Give a statement concerning the electric field inw;bdzc /,dvntk0w / k, the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal dz+twp(u17fd ok b)r -1gobwh p 6fy1,liameters are each given the same charge, the electric field (E) midway between the c )bb opoup1 6w1 (-wtyr7+ l,ffzkhgd1enter and the surface is

  A cubic block of aluminum rests on a wooden table in a reg; t 3b18)j1l h-jltmvy, oc )cg9ramtoion where a uniform electric field is direct-9lt;m8t)mc1r1cl a yhgto 3v,o j)jb ed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibri8pms 4mfw q;h;um near an electric charge

  A positive point charge is enclosed e8:kkw-ke d z1us+5q ir+wmx 7in a hollow metallic sphere that is grounded. As compared to the caqux: d7kezr+kke+w 5w1mi 8 -sse without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static erns/3a) ys0 wd1wocww/ b/0j bquilibrium.

State Gauss's law.

  The charge carried bhr,c8cwgsxn;; d wy).-.) zru s c0qfqy one 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 nr,y )i-dxx4ak2x,u)+ 6hntyr hg+ atthan electronsxn2h xat4n )ai+dyrug,k6y-,)hx t +r does this piece of plastic have?

  What is the charge on 1 kg of protsd9 lc7n9t,mz ons?

  An atomic nucleus has a charwa:ivv jyu/: *p mi+f7*mfzm+ge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sep, wa 3b1 4atfii-q.kvwarated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwk-aq4itv1b. a 3 iww,feen them?

  A 1.0-C charge is 15 m from a second charge, and the force between theor *ltdim;rrj 2ff +ct:51mc1 m is 1.0 N. What is the magnitude of the second crfrcjr1 2mlc1mo*+:t ;5 t difharge?

  Two 1.0-C charges have a fkcsks1a8m y v; b;*6c j rk7 3-ay,0s9myknxqworce between them of 1.0 N. How far apart are they?

  The force between a i4 w2 ywc;ssq6$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initia3us2*70jjd7 i2 )e zkbsxhaoglly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force x07ebo a23jujzi ssh*7dkg)2 between them?

  Three identical point charhpge0 47hd1nh3m m mr4b;ly6 wges of 2.0 mC are placed on the x-axis. The first charge is a dyewhhm4mh1gbm643p0lr n;7t 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 charge of +2oc -v/(ab fu(4m,oi ntkcoj83.0 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 th3f(kv4 c8mnou octb-(jaio, / e electrostatic force which acts on the charge at the origin?

  Three point charges are located at th ku28c l hdo0p/py9kt/qpv7+m zie /n64uh;npe 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 kph m8khnptp 40uyvi9// dcp q7+ u/l6nz2;eoof the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second bd,ox;9shz 8ipoint 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 cor8di 9zh;b, sxoner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5xol zxpye(x -x2pc; 7(.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0xl( zexcp;py (7-x x2o nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 ovskqbp3v ob x: :m.k-bw1;hc/v 3f/g m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0; mc/.1w:g bhvbvobq3 p /s-kvofxk3: nC charge?

  Three identical charges of 3.0k ys5 3jwyxo-*veu8t- mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on-3*yt kwoyvxje-s8u 5 any one of the charges?

  Consider point charges of +Q and +4Q, which ary d 58 9h4yeqrw c.p/,pnjwb2he 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,92ydn hjpypbc.q/w 8wh 54er would be zero?

  A +3.0-C charge is at theqkwm*4e iefvyk)8 *r( origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the ney )mf**ekwe 4iqkv 8r(t force on it is zero?

  Charge +2q is placed at the origin and charge7jkc0;wh 1a mk -q is placed at x = 2a. Where can a third positive charge +7k; ahwkm 01cjq be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totalj54s/awqjd u-2gm:nh 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,n6(we4cpic24e(6tk+bvu .o wd viwd the attraction of a fixed proton some distance above it. How far (6ui, b6.k oivdc24epwdvn 4w+tw(ecabove the electron is the proton?

  Two 0.20-g metal spheres are hung fr.uo1o3tat:0fi sh c7ywkxn+ 3mj-qb: om a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic oxt 7-ubw: sh .:nma3+oqtk3j0iyf1c 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 is the magnitude of the ea vqxs z1j5x/u0cc+i(lectric field at xxu/5qc+ ja(1s0i zcva distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric/4e y 8rt+/;boetqnkp field at a distance of 1.50 m from a 50.0-nC qrtb p+et//4;ko8n y e charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of t6q/4hp+ rt wl0l34kh zels5o+aqt4erhe electric field at 4etl zs0 r4 64eloh+lw+kq /pqr5aht3the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Whamzjuh (r0c-v,6 o.u iut is the direction of the el6h.-o0u (,mj curuvziectric field?

  A 5.0-C charge is 10 m from cdiv* /xs tg+5u/giap1f9*m 1(jo s gya small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test/d9ju *1 gy+5gif/ 1vtc agssx*i(pmo charge?

  Two point charges each have a value of 3.0 C and are sln ig7e d.(eq6 kk2,mveparated by a distance of 4.0 m. What is the electric field at a point midway between the two chaglik m(26 q.,e7dekvnrges?

  A 5.0-mC charge is placed at thev(bddc1p* n en*2)qcr *ga3xh 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at 3qnd*n*a gbvh(cde)1x *p2cr the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a met0)or8 wh;o .lse.nhzver stick and a -4.0 mC charge is placed at the 50 cm mark;0 ozl)h8 w.h vsn.roe. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7qx6z( 80bcy w7jrhgw -h; m*hz.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between themw6 0 grzqw*;7yhb-mzcx hh(j8?

  Three 3.0 mC charges are at the three corners of a s:o6z e6k94qnfau,huu quare of side 0.50 m. The l6oaq h : ku,fz49uu6neast corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at thj79(y(ujoo,q n0f2gwfmx r *ie corners of the square as follows: +4.0 mC at (0, 0); +4.9o2ifnx q*, gj7yf(m(jowr0 u0 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 i l6 q1d4viu) hgz;ag*h)dw95h3 begxtt is placed in a uniform electric field. Whibv4; 9 )hdggl3xd tg6qe*1ahhw zu)5at is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass 9y h,usfia l.l5rs9.w 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 uw- ub88 7w( (ggd jos-ye ek,c-pyw,n0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be-u( ej 7dg-cy-8ws(ogu, 8,ye nwpwbk suspended?

  A foam ball of mass 0.150 g carrigeh6 8ovb;wz*es a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direc8ez w*; 6hogbvtion of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is r( us6vvk2j(mp6m(c1 7 nyrotthe magnitude of the electric field 5.0pk7y( v2tnco(u6 6ms( mrjrv1 cm from the sphere's surface?

  A metal sphere of radiu;p5e zu,k fro,.1hl b/n/k. ch: dsbehs 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphelknebk. oc,h/h:ef 1rz,/ d;s.h p5ub re?