State the law of conservation of electric cf :j3 xg+5ojejnt.t+lharge.

  Is it possible for two negative charges to attract eavvp5;i 7w6wx1i a7h ixch other?

  Is it possible for a positive and a negative charge to attract ea 1qr draun8 4* de;i*j-w7i.m6rlpx azch other?

  A glass rod is rubbed with a piece of silk. Duri0bm tnoo*-y9ang the process the glass rod acquires a positivo0-y noba* m9te charge and the silk

  A proton carries a

  The model of the atow+n kgl-u9ge t c ves;)u4 q;0*rvwzv7m shows a

  A neutral atom always haaj9u u1k6ak( es

  An atom has more electrons than protons. yaqq56yn:)oa The atom is

  Materials in which the electrons are bound very tightly toc **m) mjy(3 ougfww7c the nuclei are referred w 73ouy(mcfj) m w**cgto as

  Materials in which the electrons are bound very loosely to the nuclei a2l.oc7 b26 h0oty;nk*3qpnotdbe v z/nd can move akv6 beypznt7 do 03 2ct*2on.lhq ;b/obout freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged3ei 31 fe1tf2bd d(wbt metal bar. The end of the metal bar farthest from the charged rod will be charge 31b if1wb3f(edtt de2d

  Sphere A carries a net positive charge, and sphere B i4orxqyj2te +d : gg-i6s neutral. They are placed near each other on antqe y6rg+jo42i- gxd: 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 eleck1vg, f z8oy;-h pme/hj2( dmwtroscope positively?

  An originally neutral ebkj)d1 itabnx 0k8 r v;-9t1aplectroscope is briefly touched with a positively charged glass rj1 bd)rv t;tp1ix -nkaak089bod. The electroscope

  An originally neutral electroscope is grounded b s7-+ v3lqesbtriefly while a positively charged glass rod is held near it. After vq +3elt bss-7the glass rod is removed, the electroscope

  A positive object touches a neutrve. x5vtr8, txevu4ee v+z-g1al electroscope, and the leaves separate. Then a negative object is brought near the electroscoptxr5 vezx 4ev,+1egv 8.e tv-ue, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tablewn.7 rw al2e,( i+ y*cbu7qpkn. 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. At no time does either b b(npq+. 2*n77kwru,ci ealywall touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulom5u*bg-c5un umb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first char.8 (pe hvsvwbsca qo /aw9(w1(ge is larger in magnitosqsvch (ap98 wwe. b/1 a(vw(ude than the second charge.

  Sphere A carries a net charge and spt77ayl(sd)e./(unijzfj l:r jzqu, 8;jc :p uhere B is neutral. They are placed near each other on an insulated table. Which statement bes jzd)(tley :au8uirp;7cuj7lj/ ( ,s fjz.:qnt describes the electrostatic force between them?

  Two charged objects attract each tyw3 5/*bc:ja l 8x4utcttb 3cother with a certain force. If the charges on both objects are doubled witht yct*wx 5 t38:cc/ btl3jaub4 no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive f tn*fi3 )v5l rw,rsy tdb6j;*lasg*2dorces of F on each other. If the*2;jnlf,i*rgld d)t bv3rsa5 *twsy 6 charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to thoi8 1ad6ax5tle force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers xila d5t8 o6a1is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by rp fg mp 8:u:6h7-axiua distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to thp7a:m 8:rxfug u-h6pie first electron?

  An electron and a proton are separated by a distanwwz 6ow6fm 3vu l8ino5svb+w*92la*l ce of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed wo a*vslzbf *6ll8n uv29w3+ m56owiw next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens toru vzyk:yf6r;e: *z u (fpgx+3 the size of the fu6z :f;y zr fgk p*vy3(xer+:uorce on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a 4o/9 .skbfj7*yi e m px)6chttsecond 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 of t.pos4/tek)jc 6*7f9yibmxt hhe square?

  A point charge of +Q is placed at ther/yrfql*pyv5k)i 4 mzza2 +, b centroid of an equilateral triangle. When a second charge of +Q is placed at oneb2v *,4ai fy/kqy+z mzr)l5rp 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 :l)rk 6 .f,al8lxe::ladj n jh gh5o,mis not a vector?

  At twice the distance from a point charge, the strength of the elect/:a 8q dltvs5gric field

  Is it possible to have a zero electric field value beth5qzah,b* 3caween a negative and positive charge along the line joini*h bca3z a5h,qng the two charges?

  Is it possible to have a zero electric fiert4 3 y-zrpw+old value between two positive charges along t+rtowyr4 z 3p-he line joining the two charges?

  Electric field lines near psitive point3xa8x n .tu,e9osxp4r charges

  The electric field show-ugsj2vfz )ehf*nl9 - n

  Can electric field lines intersect iy-t.uyp :o2u1ml :ij sn free space?

  A solid block of metal in electrostati93bs/ d -teqqk0+qzzpc equilibrium is placed in a uniform electric field. Give a statemezqs 9dezq p+k/ b-3tq0nt concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equbnj4ao5x/;j y al diameters are each given the same cho njb5 x4yj;a/arge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminr2ogi( 4+ pemtum rests on a wooden table in a region where a uniform electpr ( g4+ti2oemric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilk(nsci)5 2vb librium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thaao-5 o0 *2p,bok icp99abh yvmt is grounded. As compared to the case without the hollow sphere, the electric fih-i*ok0o abv yc5,2bp9 ma9poeld at a point directly above the hollow sphere has

State three properties of conductors in static.l,y(j0iit/)crui)u qc+ta i equilibrium.

State Gauss's law.

  The charge carried by one electronn -li 5dyja45p9pf 3kybt/5 lx 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 hazmw4yihr 3o-:s a net charge of +2.00 mC. How many more protons than electrons does this piri3zm4 wo -y:hece of plastic have?

  What is the charge on 1 kg of proeqxp;om /a9r; bu;e2 ntons?

  An atomic nucleus has a charge x y):r+ sf8lbxof $+40e$. 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 values of 2.0 and - mt ffp6a fe-68xt67xv4.0 mC, respectively. What is the magnitude of the electric force between txat-t6fe 86m x67ff pvhem?

  A 1.0-C charge is 15 m from x7y0 rrqv9-pw a second charge, and the force between them is 1.0 N. What is the magnitude of the second charpxw0v7r9 qry-ge?

  Two 1.0-C charges have a force between them of 1.0 N. How *s3 wbowcnfb,k me14: far apart are they?

  The force between a d5vzbx6 1y./0mt 8vq9dv cdz w$30 \; mC$ 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. Imo-hj4z9 o,f (v3mqm tf they are moved to a new separation of 8.0 cm, what isvzh3t(,qfm-o 94omj m the electric force between them?

  Three identical point charges of 2.0 mC are placu* it.6f.c gff-/imeped on the x-axis. The first charge isf -if/fg.upt.6cim e* 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 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 i6w mu9pc+ikl )s placed at the origin, -2.0 m C to thel mkw6i9c p+)u 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 origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC8jg z 5j3+7 6rk 2nualgoga pf1ja/yu6 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-m+a 36/ja82kp fr1j7ogj nl6uguyz a5gC charge?

  A point charge of +Q is placed at the center of a square, and a second point chs/id0nyrb v(idn- 4qe:;qv4o arge 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 c:vq; q i-ib0r/ve4dn dn(y4o sorner?

  Q1 = 6.0 nC is at (0.3yux)gi58zqn . 0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whynqzu i5xg8).at 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 (0,gvc2,/ar9)n )ab xwq t 0.10 m); Q3 = 5.0 nC is at (0, 0). What is theq)ar2c)gw , b9a/tnvx 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 equilateral k4:cl, -cwrf fi. n0pctriangle which measures 30 cm on a side. What is the magnitude of the electrostfli,c4pc.wkc f -0:n ratic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separh .ejl-ou: tl/.woph8 ated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q su.jpo:l w ht8ho u/l.-ech that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the o(ah6kg2qw9r4 wnjrux/0gx( a rigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be p6r/n2 0hk9qx4 (ag(jurxwgw alaced so the net force on it is zero?

  Charge +2q is placed aub6..*vkrz4o fl/t k qt the origin and charge -q is placed at x = 2a. Where can a third positivero4/*tvz6k ul.f k.q b charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. ia(,, afr 4fqwpar ;v jl;91mc 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 attraction of a fiisetr+ 0,p3 4ynzgt m)xed proton some distance above it. How far above the electron is 4g, n)z +ts0yipr3mtethe proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thtxq xd+vi. bo-tm7a:4.pj3lh 4l x)bpreads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them a pl.j3b4)b+to.xdx lqp7ah xm i4t:v-part 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 electrith4;30lcb /ov-yzb wmc field -m0 b4tlz hy;/c3owbv at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electrwg:/rliqr9j :m 2w8w yic field at a distance of 1.50 m frorjwm :98ri /w2ylq:w gm a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitux, -1piq 9p38 6ax*xjl:lyhob gmxu9zde of the electric field at the location of the test charge 91u6qx- 8x93zy imlxgjlb paox,*p:h ?

  A 5.0-C charge is 10 m g ttzbi6mm0(37psug 0 from a small test charge. What is the direction of the electric field?gttp7 03 m smz(g6ub0i

  A 5.0-C charge is 10 m from a small test charge. 2 hco -bqo u6qmg5u)4h(n;sw8wxuxm 3 What is the magnitude of the force experienced by a 1.0 nC charge placed at q6w ;m4sow- uhn2x cbgu53qh(8 xom)uthe location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancec+k ic3r;kut /c-s+7jgp4q21 quhj by of 4.0 m. What is the electrigc kbut7hscy4j;+2c/ru+ 3i1k pq q-jc field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm maj4ja 8ck+( c fjlo35yi n9nuv:rk of a meter stick and a -4.0 mC charge is placed at thjk3cc 8:yn5lfnjv 9i(uj+ 4 oae 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 memojek1 f14g2 uter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joini1juk om1e g2f4ng 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 = 0.20 m. kqk8 4u hlq j;ofu424c What is the magnitude4ucqlhk82j;q u4o f4k of the electric field at the point midway between them?

  Three 3.0 mC charges are at k9e ugr-/y9egthe three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the 9 ke9-e g/yugrsquare.

  Consider a square which is 1.0 m on a side. Charges are placed atj fy2ri1ydvd .0,)hpx.o5 pj jo)mb0y the corners of the square as follows: +4.0 mC at yjirx d h,.ov.02o0mbppj f1y )jy d5)(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 it is placed in a unifoiw6ft fqh2uf0ybu8. - rm electric field. iuw 6f8 q0.2fyhf t-bu What is the magnitude of this electric field?

  A particle with a charge of 4.0 vxc r1x 2pg6jd .r:jl. 262d-xxqq acemC 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 N/C po;.msayu-u(y:e0vo7 yglm j.e9 mp4nsinting downward. What charge must be placed on the9: myeljo p( y..emm-;u sgsu7 4n0yva ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placedjn. i9att+dx9 inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric j+tt9xd .n9aifield?

  A metal sphere of radius 10 cm carri1yv otgkngebe iyo42/hm057 s il9:e ,es a charge of +2.0 mC. What is the magnitude of the electric ihko9esg,54eeb y v71il moygt2:/0n field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. W o6p:8piquuf(yp). 2 bo w0vhuhat is the electric field oq.o:p2bp 806uui f vw)(py hu6.0 cm from the center of the sphere?