State the law of conservation of 8ky d(x q3ht 7bss7b2celectric charge.

  Is it possible for two ne oj)ced -13 no5hb7kyvgative charges to attract each other?

  Is it possible for a positiv3e 0)gtvwoic4 8om)o v5s pk1pe and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the aew:spim* 20an b;7 yuprocess the glass rod acquires a positive charge and me:wsaai7 ;*u20nyp bthe silk

  A proton carries a

  The model of the atom shows a 0vqo at8o,lydv.21ha

  A neutral atom alwaysphtv) n*iw7fjod(5h :f55b tv has

  An atom has more electrons than protons. The atom ij9.qx1y. r;kgkndc cdmeie b.)n)0n;*-e zx ns

  Materials in which the electrons are bound very tightly to the nuh0wu5 12idthh c i0q7uclei are referred to iu5td2q10 hwhciu 70h as

  Materials in which the electrw*tk4a1 t6bm;bh,nyyyy,wh: ons are bound very loosely to the nuclei and can move ,4 1yyt ,mnhwtaky6;: *yhbbwabout freely within the material are referred to as

  A negatively charged rod is brought near one end of z j.w.k6 tjpy l8rol 5+i/)jbmot6p5 ian uncharged metal bar. Theoilp)j8w py5+r lztj6k/j.t56 m. i ob end of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere if8n-d24 bnpow.y,gw tdag(vewj)). B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is corridt ov(wn. eynb)j.8gg af 4p2,)-wdwect?

  How can a negatively charg0l mfex-0 uz xuu1y93ked rod charge an electroscope positively?

  An originally neutral electroscope yq t8**jgb 8at4pmut- p,su ;eis briefly touched with a positively charged glass rod. Theau*tqe* y8p pum8,- jt tbs;g4 electroscope

  An originally neutral electroscope is g w9m w exd6.wy)r(xhv7 p:x3sprounded briefly while a positively charged glass rod is held near it. After tv 6ywpw.sm73:rpxx (exd9)h whe glass rod is removed, the electroscope

  A positive object touchemx 8 .j:t/k/xe6 ygzgas a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Wa/z .yx 8x6k/tgmjeg:hat happens to the leaves?

  A large negatively charged object is placed on an insulated t s uy-rim7ier8bj eicgx/0,(2able. 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. Thrmibij yc 8/g 0ie-x ,7sur(2ee 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 Coulo+9xu)l1yhp s psnw 33umb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a d tr 58h+l i:;lis-g5pjbpdux7z1y:*vii sj , eistance d. The first charge is larger in magnitude thaiigl p755*xz-h8y :1ujlevj: tdirbp ,is ;+s n the second charge.

  Sphere A carries a net charg rh8m by(ite+8ydyz6(e and sphere B is neutral. They are placed near each other on an insulated table. Which statedi+y(6meh bzt( yy8 8rment best describes the electrostatic force between them?

  Two charged objects attract each other with a certain for o95egv8bf..9v;zj ls2 l snkbce. If the charges on both objects are doubled with no change in separationb 9lbe.s.j9lvogzn5f; 8 2vsk, the force between them

  Two charges are separated by a distance d and 4b 7*pubhk 0:n ffn7ymq)jf6 wexert mutual attractive forces of F on w47uf: qn n7 f6)fhbk0 by*mpjeach other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract ea v ,k r5.*un3ke3 och+rzhl jcdn-i88cch other with a force F. What happens to the forccrh35+ocjcidl 83k*euv-nh ,8z.k rne 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 equal to

  An electron and a proton are separated by a distance of 1.0 m. What zxb6 0 9hx6m 1v5qj,zusq0egehappens to the magnitude of the force on the proton if a 10 jq0xux 9vzs6qbz 6 hgee,m5second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. Whai 7wyb-fd0l(zt happens to the magnitude of the force on the first electron if a 70ibwd (f ylz-second electron is placed next to the proton?

  An electron and a proton are separated by a diotrv4(x, mb 6g5u-j) qu)obvdstance of 1.0 m. What happens to the size of the force on the proton if the ) u(46qbrvt5- ugbx)mdjov, oelectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a sq8 wvqi*g5 (fkhy wxy ud9135ns8lx qs1uare. When a second point charge of -Q is placed at one of the square's co81*i(xw 3y1s95 xvdwhg8knluf ysq q5rners, 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 of the square?

  A point charge of +Q is placed at the centroid of an equilateral w ,lz 9mwinu7( ayg6v) 5kv;titriangle. 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 thirdian kv ;ti75 y9wwl,zgmu6(v) charge of +Q placed at one of the other vertices?

  Which of the following is not a vectolsaccd s, h.1/r?

  At twice the distance from a point charge, the strc2m w (1h3qckr5wtsdt, xs 19length of the electric field

  Is it possible to have a zero electric field value be4j:+f0jh9+ / dnuq6 gcqze 5xm0zosu stween a negative and positive chargesq/ hxe6udjsqu :0c +5fn 0z9zjmgo 4+ along the line joining the two charges?

  Is it possible to have a zero electric field value between two posirf vn7dml/xa:) 20ufhtive charges along the line joining the two cha)f arf2u:0lv 7/xnhd mrges?

  Electric field lines near psitive point chargest tcpy0w9,*ezza,l9 y

  The electric field shownfu 4+h/xntkomk 8 ;q3;m p5uvm*+hs ri

  Can electric field lines i8rbgh nwt90t s--: llentersect in free space?

  A solid block of metal in ele)fwf tbf. nl99ctrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the blof nbw.)tlf9f9 ck's interior.

  If a solid metal sphere and a hollow metal sphere of equal di qiz,ud)y.ed0bt x,5xe5t cukrz .xo:8v 09okameters are each given the same charge, the electric field (E) midway between the center anxt8oidxee:t0vk.yd zru5qu50x,.c)9k o z , bd the surface is

  A cubic block of alumw ln+d:p+ rl8 1.yjitkk5 y-qhinum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the chargiw:phr 5kyj-l+y tk8 dnl. q+1e on the block's top surface?

  If a conductor is in elect(sji++o 3ul0iaib 4xtzw3+l h rostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is -uvw5e(ir,:* *o iydvsdu ac1grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphe,*d-: i* cvyvurwsd1ea uio5(re has

State three properties *au8ew oxwztjz28r*,/i6euu of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elec +y/6dzjikxtyw9tq*- i4 h,sitron 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:m:pw yx+ )mzf +2.00 mC. How many more protons than electrons +:z mwm:yx)fp does this piece of plastic have?

  What is the charge on y fq r;9p(3qqd1 kg of protons?

  An atomic nucleus has-dtlrz xd)h/9 *8sili 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, )xl ,(t*dl rf3kimjn-g -n j4ihave charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric for j (lkd x3gnm,ntii-jfr-4)*lce between them?

  A 1.0-C charge is 15 m from a second charge, and the force between th0 b 5hclp*77;panfnoeem is 1.0 N. What is the magnitude of the secon*fha blp57co7 n;e0npd charge?

  Two 1.0-C charges have a force between them of l8c;duhjz7ya q;qpbz/42gpy . u il,( 1.0 N. How far apart are they?

  The force between a o feu uw63/e bky+8zps(lu *5m$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apagiq; v 7y2z;zm m-vs1+k9 ulpart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between t ku v+ylpza 7-gsq2;mmzv9 1;ihem?

  Three identical point charges of tq(9 nsk r* aj6wkf6,o2.0 mC are 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 the magnitude and direction of (9tq nkajf6s ko*6wr,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 is placed a44(lm ;u tcg esx. cup-va+xh9t the origin, -2.0 m C to the right at x = 50 cm,aes;(l9p+m 44gc u x-u .thvxc 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 origin?

  Three point charges are located at the following positl,q xb(q d44niions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.004(,n q4bid qxl m. 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 square, and a secoc*/s0oo ztd 5q(kyv:znd 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 magnitu( d5oyvqo/:s*0 cztzkde 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 = -1.0yk,+a ) djld goi3aw;3 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). d o+)3a awji;kldg, 3y What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 =j ax 23uh)t7dp -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.t a2px h73ujd)0 nC charge?

  Three identical charges of 3.0 mC are q-6 aw2tfhvj ,;t3qjbplaced at the vertices of an equilateral trianghjqfbwa2tt6- 3 ;q,jv le which measures 30 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 mzu+cr41ll4i:r or1 ez. At what point, on a line between the two charges, would it be possible to pl1zr r lci4uo: 1ez4+lrace a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. Where on i s/g7cxh42um the x-axis can a third charuhxig sm7 /2c4ge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -qnpzat(,5cb q3 is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is ze b(3a pqnz5tc,ro?

  A copper penny has a mass of 3.0 g. A total ofzn0tp(aqb:lh e3y x50 $4.0 \times 10^{12} \; electrons$ 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 i98 tofi8 n .)hk;hhvaattraction of a fixed proton some distance above it. hnto 88ikvi9 fa);.hh How far above the electron is the proton?

  Two 0.20-g metal spheres are hung4j0x, bgy7 snq from a common point by nonconducting threads which are 30 cm long. Both are g47 gnqy,s 0jxbiven 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 is the magnitude of the electric ef8p3yil0c6b fieldcf e 03bipy8l6 at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the e:*njm4x ra(.y4u fyailectric field at a distance of 1.50 m from (nyra4yf.*iu:m4ja x a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. nl-sv+wtx 10 l f:h()jn ya:thWhat is the magnitude of the electric f) :slyj-+xv1 f0( tl:n tnhwhaield at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction z u /pwapv2ly4:: b+qds /tgd1dpzj *)of the electr*djbqv u1ldyp:ga z )s/td+/4p:p2z wic field?

  A 5.0-C charge is 10 m+i7)rqjjw s8)y+v.oj1 numov from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the . )vn +y qvjjowj8ruo)71 +imslocation of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a d*74ojqe i- 6 uuxfg6piistance of 4.0 m. What is the electric field at a point midway between the two cha*o upf-6ui 76e4ij qgxrges?

  A 5.0-mC charge is plawj6af+ok11 xf19xfz) o v8i paced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at t+9p xi)6f8f1ovkjoxa za1 f1whe 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed ahu/k 8(nqsredq8- 4 obt the 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 o/s(8d ehb-ku4nq8rq the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC areppdjr79:dg 5dst 0iu 3 placed at x = 0 and x = 0.20 m. What is tij 7td psd:udgp5r 390he magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three cornerbvfm 6- dlc.k:s of a square of side 0.50 m. The last corner is occupied by a -3.0 mC chargem.6fb d-c: klv. 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 theoh,2dau(2j e4*f je3ppwp.el corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at 2jal34 p, dfj 2(pewh.*oeupe (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 a uniform electrqk:xpvm k;r zs u;5:;bic field. What is the magnitude of this m;xv:kb k; ;uz:5r qspelectric field?

  A particle with a charge of 4.0 mC h omsy1j3 ddv;:as 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 electrice69p*pc gpj2 7k5nfz b field of 6000 N/C pointing downward. Whppb9cg 26pez7*5nj k fat charge must 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 balln6*3a; tu.-adco9e kspif4i n is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and directondct-iu4efa *9s ;nk. p3i a6ion of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magsn5k).x.p /vq2cl 7j7nhzbtqis4p;nh4s a 9xnitude of the electric field 5.0 cm from the sphere's sur4l7z j.ann4 i9pxscsvp q2bthx)/qhs5 n; k.7 face?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the e7ute l6cd,ax7 lectric field 6.0 cm from the center of the sph e,7dulc at76xere?