State the law of conseg m-qf vko8x,,rvation of electric charge.

  Is it possible for two negative charges to attract each othe,l/zn;og wjb*po wbda-( 7m f.r?

  Is it possible for a positive and a negative f5ek vc5-4n7puax xk5 charge to attract each other?

  A glass rod is rubbed with a piece of silk. During t:kt.wree8o bi: b+k75 rik o*dhe process the glass rod acquires a *kbid7w b+irt:.k 5or:ee o k8positive charge and the silk

  A proton carries a

  The model of the atom shod8 a+w sfk9yezdpu:a2);a-/ ic bdo9 cws a

  A neutral atom always hs*+8 wr.xc6mfdcihv(qk m4*oyvk s( /as

  An atom has more electrons than protons. h,vd .lxt6qamov5/2o The atom is

  Materials in which the electr+*xhwje 4ib *lons are bound very tightly to the nuclei are referred thw *l+xj i4be*o as

  Materials in which the electrons are bound very loosely to the n8 fwhg0lmpv08n4/o (oj sdk7v uclei and can move about freely within the material are referred 0 d whgokvf8 v/mnj84o 0(lp7sto as

  A negatively charged rod is brought near one end of an uc y6(47 lwq4ol dimb5mncharged metal bar. The end of the metal bar farthest from the cha(l4 y6mmc wlod4b i7q5rged rod will be charged

  Sphere A carries a net positive charge, and sphere B is)mj rnvn q(+t( neutral. They are placed near each other on an insulated table. Sphere B is brierm v(+ ()qjtnnfly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?qqso ni(ji imu9f )2 txk3:7)u

  An originally neutral electroscope)8qz lu9)u sov is briefly touched with a positively charged glass rod. The ele8qo v)ul9 )uszctroscope

  An originally neutral el.q*nmq/ y,*jsa o4bgm ectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the elec an4/yq.b mjo*q,g*s mtroscope

  A positive object touches a neutral electroscopc) koy-x0l zth/ xs8(oe, and the leaves separate. Then a negative object is brought near the electro(kh/socx) ty-z0 o8x lscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is pl*yyylwkzvk(i*- f/l 1aced 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. What is -(k z*f/k*1yyylwiv lthe final charge on each ball?

  Charge is

  What are the units of the,rn7 c xvug3h 7 .+8znj9qthcp Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firv:8 o*g ;dv6) l6ob+gwdcnjn a:mrn +bst charge is larger in magnitud bn+gcgn:6 l*8;mr+)vo v:waojdd 6bne than the second charge.

  Sphere A carries a net charge and sphere B if;i(lgwrj ,5 mvab- g838 8ka/pmbthhs neutral. They are placed near each other m gbph8rjg/5wafailh -kmb883(tv;,on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chargexueoii:d)5)t k,u /tg s on both objects are doubled with no ctteoduu xg/:i,)ki5 )hange in separation, the force between them

  Two charges are separated by a distavtwsrtx l4(j2 6r,*fa*hre4j nce d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forctre4x,*4 t( slfajvh6 j r*wr2es?

  Two charged objects attract each other with a force F. What happenr*ent rpha,/.ipvi:i d79 hg0s to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers ispvi9 ,a07hri hri d/ne:t p.g* 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 happens9dn g ptjv./k-0z hq7t to the magnitude of the for/qzgthk 0 .v9pjt7d -nce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happ5yxd juk* 4fv:ens to the magnitude of the fovj k:*5 ufxyd4rce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distsn( a3h0r. grkgwld:;b r+1nrance of 1.0 m. What happens to the size of the force;bs ggr :ah1(3 d nwrk+.nrr0l 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 second 6fcyd x1sy7 b: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 squar:7yxy61dcb fs e'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 pqa, .minj0eq n s5m.,zlaced at the centroid 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 th,0zaq,niejmnq5 s .m .e center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followi 5ivemoqri:(1ng is not a vector?

  At twice the distance from a point charge, the strength of the55+vdmb 6u*l fejne5e electric field

  Is it possible to have a zero electric fieldi- evmtfpe+3t-a6j b) value between a negative and positive charge along the line joiningmte-ja )bpvti+ f6e-3 the two charges?

  Is it possible to have a zero electric field value between y28kiilpx+k 0 two positive charges along the lik0 2i k8yxli+pne joining the two charges?

  Electric field lines near psitive point chargekhfbot7-gsb0psj /a508 o k;ds

  The electric field shoqz 1bu 2a lrrov4(dt; e,1j3enwn

  Can electric field lines intersect inq8mr* s3l x2zhezl+ h- free space?

  A solid block of metal in electrostatic equilibrium is placed/c;d ag60tf d6an1zw9vs:qo q in a uniform electric field. Give a statement concerning/ws; z6nc0va1t qogdaq9fd6: the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters4xmcopex4(vp ;3(l fp are each given the same charge, the electric field (E) midway between thpp (4;v3exlx(pom cf4e center and the surface is

  A cubic block of aluminum rests on a wooden table in a regio vl0011e dvnjkn where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's topk0e lvn1j01v d surface?

  If a conductor is in d0pg1(m bc 3 nmz;gy(jelectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groundab 6yq:zmqgrv6t5obd*v:6m p)a 2 a+t ed. As compared to the case without the hollow sphere, the elm 6t:m)avadygq vr 6q b6+2op*b:t a5zectric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.bzpl:ja9zr,;n gi.*s

State Gauss's law.

  The charge carried by one electrh )u;.eqma-cngi6 fu2 on 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 ma;wbi g eo-9pc1ny more protons than electrons does this; gcp w1o9ei-b piece of plastic have?

  What is the charge on xsr4. ghis. rvkm ig9j.5d+d)1 kg of protons?

  An atomic nucleus has a chargekwdrx056caqz0r/ )q g 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 charg-.cu: ya0 4el hl5losy ag7)5fm fuxv:e values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between ty5yfl. ::guh c 0lvmo 4xea)75lfa-ushem?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1k9lqm3oq8m g9o6oi/ ptp - -ic.0 N. What is thgoil mpqkmt - /c pqooi-96389e magnitude of the second charge?

  Two 1.0-C charges hag: h pv,vgs5a)h2vs)sve a force between them of 1.0 N. How far apart are they?

  The force between a l g/wac1rsb( *d4lul-$30 \; mC$ 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 fon c 7q4c( lp*a8e vfla)tpmbgj12y(g:rce. If they are moved to a new separation of 8.0 cm, what is the eleg:n(j8ev ct q72(gmlyl* abp fa)c4p1ctric force between them?

  Three identical point charges of 2.0 mvno6* 6a1vmlri03qo kC 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 r1 3l o6kv6a0nvqoim*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 charg g9ei7+g getlsvcmbzj-(-z2 g e4( uo;e 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 magnitude and direction of the electrostatic fo-o- eebggm( l(e+9 sjcgt2uz ; 4zvg7irce which acts on the charge at the origin?

  Three point charges are losr x*f4ufzlsan8ts w+5h 7x8dsuo( 4-cated at the 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(s5+h4s*nxx u- fr8szwsloa84uft d7 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 alioqvnd3 z:( ( second point charge of -Q is placed at the upper-len loz3:vi(d( qft 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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10,h dn yjt *s/hg;d2w;)x;dyh i m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on sd,wh;) d;ihyx/ tg *;dh2jynthe 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC isly 4yt,i*:d u ;*nqpiw at (0, 0). What is the dinp u*ld yyq:4,t*iw;irection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilab 4sl5x/hi+mij z*5 qpteral triangle which measures 30 cm l/pb5s 4jmxh+* iiq5 zon 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 zzh3bx .yjm2n7 ;s :kqtkc(4p 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 would be t2(k3p4z b;c nxsy:q j.m7khz zero?

  A +3.0-C charge is at the origin and a +9.0-C chbp/ a2t/ah cd9r b.5nbarge is at x = 4.0 m. Where on the x-axis can a th/rb2bpbn/9ah t.ca d5ird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -izh7xk m 0h+ 78/ggaceq is placed at x = 2a. Where can a third positive charge +q be placed so that the force on 8gm/z x77kh c +aihe0git is zero?

  A copper penny has a maynd yr3f;w ur30n4/e vss of 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 b 3kech,syc 2ie(2(atagainst the force of gravity by the attraction of a fixed proton some tcs2hibc3e 2 ayek((, distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres arbvvu:,+hx: zl e hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repuvhv:,+ bulxz :lsion 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 ofje*s sh. rwalv8kh:, 1og+q ;k fjwp2, the electric field at a distance of 1.0 m from the n owplsvgf,hke.;j a*1 k +h:q s8rw2,jucleus?

  What are the magnitude and direction of the electric field at a distance ofom(4sqo5a y7x )9vf rz 1.50 m fr45(xr9)ym oq vfo7s zaom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is :svn)+v2unez the magnitude of the electric field at the lo nn+vs)2ezv:ucation of the test charge?

  A 5.0-C charge is 10 m from a smal v4izp( bo5-;ytwbfi)zn + /awl test charge. What is the direction of the electric fieli;+ ( t/afpwznb 4z- wvy5)boid?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude n/-(vd 3fl8qwp b 0ozvof the force experienced by a 1.0 nC charge placed at the d8fpvwz- 03lbvno/( qlocation of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a dis8u*yh 59 hn-pvi df hfu2z-7uxtance of 4.0 m. What is the electric field at a point midw827nv hh fu-hzu-ydx* u9 ipf5ay between the two charges?

  A 5.0-mC charge is placed at v sv.pi*8lu/bthe 0 cm mark of a meter stick and a -4.0 mC charge i*s8/.iuvb vl ps 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++w8w ea4pl p:xw ju7l cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. e+wp4:j u 78wplx+aw lAt 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 =ykr16n:e f z5qmyk( ;a 0.20 m. What is the magnitude of the ele qm y:5;ferkk1ynz (6actric field at the point midway between them?

  Three 3.0 mC charges 1hpo / 8rfyyv4are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Finyf/pvo84h1y r d the electric field at the center of the square.

  Consider a square which is+rfbte.lwa) m9(la((:c3p i cif / qgw 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (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 fieldla/cfgw. a3mi (lw t+c(e:9rqfbpi() at the square's center?

  A force of 10 N acts on a charge of rdemn1 )5v+ndr jp-h, 5.0 mC when it is placed in a uniform electric field. What isne5 +r ,nhv1mjr -)ddp the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of .wdq56*sjtwzu8kze ,x 3xj +y$5.0 \times 10^{-3} \; kg$. 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 600qdu-i 12lve4l 0 N/C pointing dow2v-lle d1 i4uqnward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.06; f j4:kgjdmoly)mf- 0 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the 4:-ydmmk;go f jlfj6) electric field?

  A metal sphere of radius 10 cmg ;8 8vbxup4tk carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphe v;gxt8bup8k 4re's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elvpskf(/g6 .wbj.7o eaectric field 6.0 cb6k a(.. /fwpeogs7jv m from the center of the sphere?