State the law of conservation of elekb;sy +bmoz6-ctric charge.

  Is it possible for two negativef /oxae6l9j qzl4;kz+ charges to attract each other?

  Is it possible for a positive and a negative charge to attract di68lom) ff.*v5ow ldeach other?

  A glass rod is rubbed with a piece of silk. During the proch:ljkafgyu; a) ,6 a5fg1,phwess the glass rod acquires a positive ch,:h5gh 1apa6j, lu ffg wky;)aarge and the silk

  A proton carries a

  The model of the atom h6al.)xn 8 / *6jmttkw zjst-eshows a

  A neutral atom alwaygy ji:jbtf v/ te(a0/*s has

  An atom has more electrons than protons. Tig wkwt :z6*siht vq21 4wf1k1he atom is

  Materials in which thersp2;8 nv1tf75 5pgecw8 uaq c electrons are bound very tightly to the nuclei are referred87vpe c2wu t8pasc;q1f r5 5ng to as

  Materials in which the electrons are bound very loosely to zt7w: rdlan6qcl9 ; hl*i 2+ptggla7)the nuclei and can move about freely within the material are relzc wtlrl+t7 n ghaqld7a)*6 ;ig9p:2ferred to as

  A negatively charged rod is brought near one end of an uncharged metal bf+4n,;u m0eii6 zxnhcar. The end of the metal bar farthest from the charghx u 6c;+nznfi40m, eied rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They arecqlum35 1 0 -0t 9tmene(ajnr jn:g/gr placed near each other on an insulated table. Sphere B is briefly touched with a wire that is gm10qe0 u9-a jnnmt r3 tr/celjg:g(5nrounded. Which statement is correct?

  How can a negatively charged rlnoje l17, r1 81odwxdod charge an electroscope positively?

  An originally neutral electroscope is briefly tou6u zjg )j1nk:e0 -zaqfched with a positively charged glass rjz0naqf gz)-ek:1u j6od. The electroscope

  An originally neutral elev aeuutk:5iqw)sc,(r.n1 r x0ctroscope is grounded briefly while a positively charged glass rod is held near it. After thk(wn ,c5 q.r0iu1aus:xvret) e glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves se+qk.7n./wr0n e d ljdfyp1c6y parate. Then a negative object is brought near the elect.wy.c+n/ 0jknq 6dyfl 7 pd1erroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. mpj, : :*awxdmA neutral metallic ball rolls straight toward the object, but stops before it touches it. Axam pj, dm:w:* 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 Coulombj,a98l;9gk;ges; b*a0kwi(lp nt lxi constant $k$, which appears in Coulomb's law?

  Two charged objects are w. ( hggo0nqhhc lz v 3z4t2x*rpe lajl+992n2separated by a distance d. The first charge is larger in magnitude than the se+l9wx naczz* glh v3ne l.j 202rotp24(gq9hhcond charge.

  Sphere A carries a net charge a7(m63d doe/rat:lok vnd sphere B is neutral. They are placed near each other on an insulated table. Which d3kr7te(/m odl 6ov:a statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. ri5i lkqos gxz(1; /:qp)yfp(If the charges on both objects are doubled with no change in separation, the force be:rgpqs i i5zy((px/fq )l1o;k tween them

  Two charges are separated by a distance d and exert muturn68 b1 rhmr:val attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutubr1r mh:v68nral forces?

  Two charged objects attract each other with a force F. What happenrpv)yjv p-.s,t/oeh7j .s w +ss to the force 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)p jj.o-et/w sps y7h ,v+vrs. equal to

  An electron and a proton are separated by a distance of 1.0 m. What happens to (b09uavrax w,the magnitude of the0wu9r,a(bxa v force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distancem+1b 5fo aywejc7i2px:, p jt9 of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placedp j5ymi 9x 2p:,twfc+ bj1oea7 next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What u+u62 fks,)ql4xlu,bu : sphahappens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton?al q2 ,4x+luuhpksbf)s6:u, u

  A point charge of +Q is placed at the center of a square. When (m83rnz *ck et:cfrl q5/rgm8a 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 the positive charge at the center zq8:f5r cr8gckm*nm /rl( 3teof the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle.a ,j7y h1h un4rk(0pbv When a second charge of +Q is placed at one of the triangle's vertices, an electrostaticv kbu0p7r,h a1n y(jh4 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 a3ysw ckwmn-yx1; o *s y+4rbz9 vector?

  At twice the distance from a point charge, the strength of the e0 1sjegrz32q electric field

  Is it possible to have a zero electric field value beoo+w/ as (yb wvv l54 je93jqti-d92hdtween a negative and positive oes 4j3d-9 /j+9i waobh2dwlvqt(v 5 ycharge along the line joining the two charges?

  Is it possible to have a zero electric field value bed109ffphhy; 5om81,ki lbwh ytween two positive charges along the1 0whl 5d9y ,yh8khbp1ofif;m line joining the two charges?

  Electric field lines near psitive point+6-y gv6yhzleo; ghv(o(0vn . lrqru) charges

  The electric field shown (. - zc naxwyo,wz0ys8

  Can electric field lines inr,22ns4 0r+jvloq )vhy 44sl)siedovtersect in free space?

  A solid block of metal in ex .dzxta 1qf8/lectrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the ea8t z1fd./x xqlectric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each t k0q4c-v-s 4rx:cz5xqia.ni given the same charge, the electcqc :ri4 tixk40-5x. svza-q nric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in vjwovd8d / ln*lq+o1i6 uh8 3xzm1)zo*v *ox xa region where a uniform electric field is directed straight upwvx8 6l 3hzx/l*om811d)ooqvuzxv doj +*iwn* ard. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electc wwmj uq8(x0(ric charge

  A positive point charge is enclosed in a hollow metallic sphere that is g d*)r+:3-mgb lo luyqorounded. As compared to the case without the hollow sphere, the electricyr*q) b ol -l:+umog3d field at a point directly above the hollow sphere has

State three properties of conductors in static equxk((xxa x:jp )ilibrium.

State Gauss's law.

  The charge carried by one electron isd( 9ybtb+j:uq z3 )sjms pgc*0 $e = -1.6 \times 10^{-19} \; C$. 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 proer2 - /dxuid,g59 ryp 9qu3knxtons than electrons does this piece od y3e x/x9i2pu,5-k rndqrg u9f plastic have?

  What is the charge on 1 kg of protons qrn9 f38 ol.m(nt9-f5off,vbnxph 7e?

  An atomic nucleus ha vwnmiiwl 25;+s 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 1.5 cm, have chargenfl+ljr5d/z 1 values of 2.0 and -4.0 mC, respecti1+jr lzf5 dln/vely. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betmk meh0vl fv5r3:y )0wx:lil4ween them is 1.0 N. What is the magnitude of the second cha:3yvlx le5h0mvl0 f:)m iw4rkrge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart a4l cg9znc 4crg*v(os -re they?

  The force between a se4/3;ow xtc+jpv s/p93.zv nyr nie:$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 d qok e29+bd7lcm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betweekqb 97dldo+2en them?

  Three identical point charges of 2.0 mC are placed on t04g 7v djjrgr: wnw73khe x-axis. The first charge is at the origin, the second to the right at x w0 jdnkr wjrgv47 :37g= 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-axp1c( (lwtwiu -is. 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 mi1-((l twwcpu agnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following posda(6mdd a//p mitions: 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 mag/ada( m/dp6 dmnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center ex j,i1ie sblr jzw t-.3ti -mn468 )qpx3ky7zof 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 centezi 3zbjnik8i t4jqx13xets m) l.-e-76,r ypwr charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.3//ty sjnsz.;id tm94r 0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0)dtst.nm/ys 4iz;/ rj9. What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q v9h1orfy9hh1-sde(l osc-y 62 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net ls9droy(he 16cs19-o -hhfvy force on the 5.0 nC charge?

  Three identical charges ofah.(yiqa(u:+tlv4vp don:d*z e8 y +e 3.0 mC are placed at the vertices of an equilateral triangle which measures 3i:8*dh( . pvzy:na va4lu qedo+te +y(0 cm on a 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. At w,9ectghi 9hi x3ft sg2)+q9qghat point, on a line betw9, cqhg3 i exfq +9sgt9)thi2geen the two charges, would 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 thehm oqqyiu3nbz0/ (w v1dul ;87 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/(dnu;yu 0zqm1w ih7q ob 8lv3 net force on it is zero?

  Charge +2q is placed at y nl(u/*4nj 5jlg mjj;the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the foj5jl ;*n/ym 4nglju(jrce on it is zero?

  A copper penny has a mass oq c c,8/u+kv de-sd0mrf 3.0 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 the6 4/sk9 ror,ohpl,qxj force of gravity by the attraction of a fixed proton some distance above it. How far above the ehlpj ,,oq/4x9 rrk o6slectron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thread.c rg :i r4w1fu z:icu9pt7s6rs which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle i 94:rc1gz7w.fcuustrp r 6i: 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 electr0 g-4 myndt c;hb7 gty+9yom+fic field at a distance of 1.0 yf4-t n79ybgd y+0mm+ocgth; m from the nucleus?

  What are the magnitude and direction of the pprfx:;0i 5 q;+kxuh kelectric field at a distance of 1.50 m froh5ipkru ;: f0 qkxxp;+m a 50.0-nC charge?

  A 5.0-C charge is 10 m fraj c ;n-s4yjt1om a small test charge. What is the magnitude of the electric field at the locationynjj ;-cta14 s of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direct eh dc6r-uogun.0 v6b2ion of the elec6oe02u un g6bh.v-rdctric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thesxu.(ra4 - fkzvip j5nyxwk-4 :t.nr ; force experienced by a 1.0 nC char fr5s ni4.( k-;:4atkr.- xjyuxwn pzvge placed at the location of the test charge?

  Two point charges each hav: 9q0x rzdka*az/o,cs e a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the t*xrc/ 9kdoq aaz:z0,swo charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick a,uh1 2j; xnclvnd a -4.0 mC charge isu,nxj 2cvlh; 1 placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter 8tsz8 viv 6(yzstick and a -4.0 mC charge is placed at the 50 cm mark. vz8svz6t (yi8 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 = 0.2y(1fdh; q22bkyf oq2li: a r*x0 m. What is the magnitude of the electric field ; xrqyiq ad22l :k *o1(fhy2bfat the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 09p;6ssarr xag76*pehu5 scj9.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center o9sucap e6jr6r s59s7* xhpa;g f the square.

  Consider a square which is 1.0 y e *stxl v5 kdeu.3zi;)q;v0gm on a side. Charges are placed at the corners of the square as follows: +4.0 mC ateiud.vt;5 e kxv ;syq)l3g z0* (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 iq/ iy4dqtd t- /d)iv.vt is placed in a uniform electric field. What is the magnitudei4)y/- t/q.vd it ddqv of this electric field?

  A particle with a charge of 4.0 mC has a mass o m.h85cnh libg6n us*;f $5.0 \times 10^{-3} \; kg$. 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 fm/u )1gvi:lubov ,,jo6mj ;lqield of 6000 N/C pointing downward. What charge must be placed on the ball for it toilj /ogu,:v1 ;qum ml6,j)bov be suspended?

  A foam ball of mass 0.15j2e2g 0ee5g f wz.wxcpw.ykttv8 )oa23(u-i t0 g carries 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 tg. 2t(x3a eetuw 0kgwp.2fj 2 yioetzc 8)v5-whe magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2. uw-sud7-677 pgpblmr 0 mC. What is the magnitude of the electric field 5.0 cm from the spherems7 776-gpd-lurbpu w's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the* 7 *y5i+fiwpzjg7goq electric field 6.0 cm from the center of the7 *5zf+jgi*oq7igp yw sphere?