State the law of conservat/qd vb:ryaq6-p n d,y*ion of electric charge.

  Is it possible for two negative charges vui7h3 pd8b5yb* /l0: jhlvr8rw2gy6qslg4o to attract each other?

  Is it possible for a posit ( 8 u,gyiyp7kzq* gb8+fnxvn;ive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glasj/ pg;fo(40pwl2ylw u s rod acquires a positive charge and the silkf2/pp(w;uwj0l4yl g o

  A proton carries a

  The model of the atom s2o3;u( qwc emyhows a

  A neutral atom always 5;vus :okqm(:p 87zlvs 4k mqxhas

  An atom has more electrons than protons. The atom isgy;if24vg 8c d

  Materials in which thu9;lw wewr3jhzv u-3. e electrons are bound very tightly to the nuclei are referred ;w-jue 9wuvwrh 3 l3z.to as

  Materials in which the electrons are 63 yyy5fwg36aprgub /bound very loosely to the nuclei and can move about freely within the material are referr /3buw3yg6r ay yfg65ped to as

  A negatively charged rod is brought near one end of ank pz17:avh+a 1,oruv*/jq bby uncharged metal bar. The end of the metal bar farthest from the charged rod will be ,vb7a/or:q*1vz yak +1jhpubcharged

  Sphere A carries a net positive charge, and sphere B is:px jt:mzv2v ptx.t:(o29 xrm 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 vt:t2(p9 2tmx pxmx:j vzo:.rcorrect?

  How can a negatively cl8*6jtr, xsy pharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched wivkm(hnb(rmcf6w 6gz:+/ i 0gnth a positively charged glass rod. mcgnib +6:zvh /nkgf 60wm((r The electroscope

  An originally neutral electroscope is grtpj6n6wb5u jix, b- ytgo8n/ 7ounded briefly while a positively charged glass rod is held near ittwj 7itouxpyb 6/8 g,6-nb jn5. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the,l.w. r8jl x7sx c.q -2ngpe.dz+opdi leaves separate. Then a negative object is brought near the electroscope, but does nowc d2ljpn zq -...l,7+o8.x drsxpgeit touch it. What happens to the leaves?

  A large negatively charged objecpjsf) 0cj9 *umso)m-ts7qog1 t is 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. At no time does either ball touch the negative object. Wha9mspo ct) f7sqjms*)-0g1u j ot is the final charge on each ball?

  Charge is

  What are the units o dq 0;5*prws2 y:d-ju n:y va98jlykajf the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firsg osna+p7+mkiaird za(0b)8 (t charge is larger in magnitude than the second cha(p skan8og+0 ma)ad7( +zriibrge.

  Sphere A carries a nek0.ymkxa; ai. t charge and sphere B is neutral. They are placed near each other k .x 0;amaiy.kon an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other wiaxv.m* au2j4yazs4,y th a certain force. If the charges on both objej24a yum4xa,yv. *sazcts are doubled with no change in separation, the force between them

  Two charges are separated bv;y 0yyyuw3lwq)j31 xy a distance d and exert mutual attractive forces of F on each other. If the charges0y3;w yq3yxul1 wyj)v are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attracw q 0hfy4hq 9i,j)i9xmt each other with a force F. What happens to the force betx4q whii9f0,hjq)my9ween 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 prot*fd6u1fo drhbwv80/r rl 8 q s9qzgb26on are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron isgz6rf9 2vurw oqb 81/0dl b8q*h s6dfr placed next to the first electron?

  An electron and a proton are separated by a distano1k :,*wjunkp; n m 9qwofo7.fce of 1.0 m. What happens to the magnitude of the7p1o * j:wmfko ;nwk,qfno9 .u 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 1.0 m. What happens toj)tlb:q(0vs ccdc d/0 the size of the force on the proton if the electron is moved 0.50 m /jsld d0)vqc0c (tcb:closer to the proton?

  A point charge of +Q is placed at the center of a square. When a xcjh o2w af(u .n1h:2usecond 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 ce 2uuhhw :n(c.fxoa12j nter. 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 ca6 g z/:sx5bcibn8iqzf ,:06ldu 0k zpentroid of an 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. What is the magnitude of the force that acts on the center charge due to a third cz:6xz5/ uz6lis 0dc0,pkgqa:n b8fbi harge of +Q placed at one of the other vertices?

  Which of the following is not a vector5m+mwsyon wh+y64) ez oszp62?

  At twice the distance from a point charge, the strenp 5mxj 7;7lfndgth of the electric field

  Is it possible to have a zero n 1h0lgd 1z6cs,tjest; rqf+5electric field value between a negative and positive charge along the line joining the 6t; sgejcl +, 1hn15sqr0dztftwo charges?

  Is it possible to have a zero xw1kneit8: 8q electric field value between two positive charges along the line joininwq88 1 :tikxneg the two charges?

  Electric field lines near p1o)zt kl,hi/m gc v; qc)(ggk,sitive point charges

  The electric field shownx1ukwtk(v-cvo0 k2 u)

  Can electric field lines intersect in free space?3 o5ft8r7in cb5uyl+ehhxs9n*- 8 cuf7sx(dn

  A solid block of metal in electrostatic eo ;g1 xj1d(-dk)zz akrquilibrium is placed in a uniform electric field.x g(adkj;rkz-1 1od )z Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diametv5; cii:anh3bop oa, kaq*52 :il 1wwders are each given the same charge, the electric field (E) midway between the center andwki ap5h2;c:an51b3 w :vlooi ,diaq* the surface is

  A cubic block of aluminum rests on a wooden table in a regioe4, 7,z8xjmw ;p homeqn where a uniform electric field is directed straight upward. What can be said concerning the charge h,oj z ;84,wx7pemme qon the block's top surface?

  If a conductor is in electrostatic equilibrium near .r9:+;b2t0y kjuqvmbkboe .yan electric charge

  A positive point charge is enclosed in a hollow metallic sphere thy-r, /3u sn/. bzifol7dqv; puat is grounded. As compared to the case without the hov,3nbyopfdlu-;.r i s/ /uz7q llow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in stbhr *t +8jgn6gatic equilibrium.

State Gauss's law.

  The charge carried by one electron izer :,o8xtz0 c(5( mhsuviv+ zs $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net chargt1:(:ado y v:.u lwoote of +2.00 mC. How many more protons than electrons does this piece of plastic :u ow a:lotd(t.voy:1 have?

  What is the charge on 1 kg8 *e81u ep* ;tbobgkgkfy63ea of protons?

  An atomic nucleus has a charge oditym*tg 2-ys g0j,3)ai0pbbc knbw b)/6m)jf $+40e$. 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 26utr0 3f5lq (c klbc2g.av1bz.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwee6 fu30 k(.gl2tccq avblb15zr n them?

  A 1.0-C charge is 15 m from a second cha*bp (i m0sr vewdn31lhb5s1( xrge, and the force between them is 1.0 N. What is the magnitude of the secondb3lwb1dv( 5(hn spsi0* rm1ex charge?

  Two 1.0-C charges have a force between them of/4ni+/xtk ghb 1.0 N. How far apart are they?

  The force between a e+kb fic lr*n) gni98;b 5-eu2p+/yx.lrwzsy$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, epf:7flbx ,e () kernw;xperience a 1.0-N force. If they are ewf)peknxrl7;:f,( b moved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. 38du g y y8:h9bwp2wgc The first charge is at the origin, the second tob8y wcwg:9y gphd823u 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. yi +en+nu4ds969cykiot9 fjo8+rl*p A charge of +2.0 mC is placed at the origin, -2.0 m 6*co+8+ys ir n9+onp94iu 9df ltkjeyC 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 origin?

  Three point charges are located at the ftb ).z 5d/:q4zzzjaa am7w* +ctm 4+laxtoxg 9ollowing positions: Q1 = 2.00 mC at x = 1.0azt4 74xm+za:.wjl t/t x9 )b gq zaoma5c*zd+0 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-mC charge?

  A point charge of +Q is placedo. szo hm6q 1a:g,y/su at the center of 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 tz,qys:a 6 1/o.msohug he 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 = -1.0 nC is at ;r+19e qf cjjb2fth,b(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?jq;rc 1+, jbt92ffhbe

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3i4bx,g uea) un ;+0gjsixmx4* = 5.0 nC is at (+m *)ax u,sex4ijx0ui4b gn;g0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC bkymim 8x u*53are placed at the vertices of an equilateral triangle 5kx3iybu* m8mwhich 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, whicht/ nfpyvky v20z;a x4q0s5c2 r 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 th s/22c4 ayqrynvk0zv ;fx05ptat 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 o1vfd33ui 32(qu s w6fcb2iogln the x-axis can a third charge be placed 3 fq wvu o3fg62ids1lb(u 32ciso the net force on it is zero?

  Charge +2q is placed at the orujw5c s0ik -1w*bcu *tuqw+ f2yl 20pkigin and charge -q is placed at x = 2a. Where can a third posiwq 0 i+bwc *ktf2-5ul1sujup2 yck0w *tive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of x-x(rjm3gzp* (cn r m*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 the force of gvu8rvj5+5c6of yg iw2ravity by the attraction of a fixed proton some distance above it. How far above r5ywo c+ 2 8fjviu6v5gthe electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting tq8qc7muv)ds8tn*i, z hreads which are 30 cm long. Both are given identical charges, and the electrostati*zt8)7 m8dqs,i nvq cuc 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 8 blwa8.jctr p3k( s:zfield t c(sjb.l pwazr:8k83 at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fieqpf / k3nv8v. *ozyah/ld at a distance of 1.50 m from a 50.0-nC cha3*qfv y.vokh a 8np/z/rge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of2me5rka,-pv v the electric f2k5amre-,vp vield at the location of the test charge?

  A 5.0-C charge is 10q )no o*vapls3 julm)47t:e1v m from a small test charge. What is the direction of the electric fiellsoptn)1vo: 4q7)eul *av m 3jd?

  A 5.0-C charge is 10 m from a small test charge. W7lx3rzp ,;sl ghat is the magnitude of the force experienced by a 1.0llpr ;,g73szx nC charge placed at the location of the test charge?

  Two point charges eac 4w/tf,e yzf,qh have a value of 3.0 C and are separated by a distance of 4.0 m. What is ttez q,4ff,w/ yhe electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of.g( 4jz 1eeycd a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the (c1j4zy.gee delectric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a8 crg +8x:ao4eisb/zh meter stick and a -4.0 mC charge 8:8h e igxr azo/b4c+sis placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.59w4ig+gd 8su l/re(uy7ywu r 0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at theygl5ur8e/ i4+u7uyw(g d sw9r point midway between them?

  Three 3.0 mC charges are at the thre4vch 1.,y l0ii.ntw zke 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 centewiy1v.,0i 4l.t znhk cr of the square.

  Consider a square which is 1.0 m on a si3td;2 irkaix vw) f g1nvd/3,ide. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1nv)2v3idt i gfxra;/iw,3 1dk ); +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 l; ccr(lf+3qe2 swgef 8 c-ow8when it is placed in a uniform electric field. What is the magnitude of thisw2gq-e+l( c38;lrc 8scfoef w electric field?

  A particle with a charge of 4.0 mC has-yf/tk;8xi(q d, ocfu 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 +a6 qhw-3ti2i v 4;pond 0uqdoelectric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspendvdton-4h 32oi;q6di paw q0+ued?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball isfo 1/ b-,wpdatln.k-v placed inside a uniform electric field, and is a-1,/ t.oblndfw-vpksuspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 co-,i7 kwwq)n qly3m,um carries a charge of +2.0 mC. What is the magnitude of the -y,l )wwnkiqmo,uq37 electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries adj-.efw ,+a jitn;3tq charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphenfw. ej3, t-+tqjad i;re?