State the law of conservafdt x7/ z3qt-l i60-io tizgsco*0o2 etion of electric charge.

  Is it possible for t s5t j,a4ozb,mp o/6xywo negative charges to attract each other?

  Is it possible for a positive and n)84dy :tdls: +4y)i).d i hxrdmrcul a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass m-ki2np99o:k -,qtq 5 v egi;adsa(x nrod acqv99g a(t;d iasmqep52k,qonk-xni-:uires a positive charge and the silk

  A proton carries a

  The model of the atom shows do6*kvugqitb)8e v:1 a

  A neutral atom always hahdrhzh7 6w a;t.ie4 )ks

  An atom has more electrons than protons. The atdzn+wvpq 9.th eg h4kf b5r27/om is

  Materials in which the1av9 o vxmrze2cp9+kir74b r4n7d49 nc 8tgpb electrons are bound very tightly to the nuclei are referred t+ekcn v2t4gz874pv1rand 9b7 bri99 4p or cxmo as

  Materials in which the electrons are boun3ss eykq(c 7ay1e 5iq-d very loosely to the nuclei and can move about freely within the material are refey sk ais(e75c- q1q3yerred to as

  A negatively charged rod is brought near one end of(iz/ w5 kt ueda.n(ii33 1np/ lzinvx: an uncharged metal bar. The end of the metal n/3( ixi3 i 1punz zvw kneald/t(.:i5bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neut:ksa ctgr 0u3),x9e ukgl; s+2zh tj4rral. They are placed near each other on an insulated table. S2lsg9 jg0ht3a+xc r,sz4k)u ;t:uk re phere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charge c /d*s ;)s7.*db byd4mc9s1g gxbbvvgd rod charge an electroscope positively?

  An originally neutrag6rib5y , + dj47bdt hu2mv/baz5n)k ol electroscope is briefly touched with a positively charged glmbob6/radz)i75uhy ,2kj+vgb t5 4 dnass rod. The electroscope

  An originally neutral electroscope is groundfyhp62g+xz57 w z-ie4j0rbdg ed briefly while a positively charged glass rod is held near it. After the glass 65zd4yi+0 rfh -g gw 7xjzbpe2rod is removed, the electroscope

  A positive object todxs 2 8yndoypo3px wx/x7e-(4uches a neutral electroscope, and the leaves separate. Then a negative object is brought near the e 4 x(3d2p8yd/ pxn-e7 xoyxswolectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged lh;leedq ) r9.object 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 n;qr eh9 dll.e)o time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulom :k jg(hbwat 7/)+:uhin g)dhzb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cj5pu( r;izba .harge is larger in maz ura;pj.5 i(bgnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near ea2zvwgjm. d,i *-gchi-+ej an2ch other on an insulated table. Which statement best describes tha ci z-g2jn-wv2i.hm j+,e* gde electrostatic force between them?

  Two charged objects attract 0rvt* cy/fg+ y*-cwtzeach other with a certain force. If the charges on both objects are doubled with no change in sepa c+ y**-cttr0y/zw gfvration, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces a b9t /-xuh7 trr6c0ehof F on each other. If the charges are separated by a distance of d/3, what are the newxhc h-tbr e6/atr7u90 mutual forces?

  Two charged objects attract each other with a force F. What happen5k*gvt ,w.dxws to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers iw5.g* d wtxv,ks reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of)lujpu, /umn; /dyr yb-7sc6 r 1.0 m. What happens to the magnitude of tl-/7s ;cuynp dmbur6)j/y ,ru he force 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 happe;x++gcplyd3un f t *;f zw6rl3ns to the magnitude of the force on the first electron if a second electron is placed f63n*gf3 +yr ;wlzux tdl+;c pnext to the proton?

  An electron and a proton are separatekc2u-oejujaek2hru584- w5gd by a distance of 1.0 m. What happens to the size of the force on the proton if the electrojejg5-u w8uu 4e2 ocha2-krk5 n is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cent7 vbsof q; *gtf els.j-a;u3j*er of a square. When a second point charge of -Q is placedf 37g sts l*v.;o*e-aq;jjufb 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 the square?

  A point charge of +Q is placed at the centroid of an equilateral trvm4a7o8 nb .rpo4fv/kiangle. 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 v.vobn 4fra okp/4m78is 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 limht:0jej*vepjr,d -q2b5 3 not a vector?

  At twice the distance from a point charge, the strwdc2 wh( fmg;y28:mv gength of the electric field

  Is it possible to have a zero qsu.sdnr ;h +l4jbm47 electric field value between a negative and positive charge along the line jo4s7.s hqjb; 4nrml+du ining the two charges?

  Is it possible to have a zero electric field value w,r -8 /9ja0sbd0qoy kllmyg5 between two positive charges along the line joining d 8rjs/lwy q0-0 5bm,kgo9yalthe two charges?

  Electric field lines near psitive poifm-y9i xvf k)-amtb bd/cc;8 h5 y2cj6nt charges

  The electric field shobhe 9pv )7d3+ rj0.g cybt+gjfwn

  Can electric field lines intersect ii9lj sm 9k91e 8o3 z9ebcrf8 fzpzlv*/n free space?

  A solid block of metal in electrostatic e9;sc*;m/ x+jdg fjx(vd7mhe r quilibrium is placed in a uniform electric field. Giv9/rmd(; sd;v7ecgmjx+ *hfjxe a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equsr5: kp7abhud3)) / nenk t83v-tewgp al diameters are each givet8wu b: )73/nt hae3pg rkdps -5kevn)n the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wood q5tnfq 7fk+y5en table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top qny57tf5q f k+surface?

  If a conductor is in electrostatic equilibrium ncv10xx ka8 )vktqq,z9ear an electric charge

  A positive point charge is enclosenx1d85zrien6u (9 smkd in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphe krdi9ne (m 1x856usnzre has

State three properties of co6* vrgqw 2hlfo3i6/cl nductors in static equilibrium.

State Gauss's law.

  The charge carried by -iu6*yux*a hloop08t one electron 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 y3,:pwzo)urkeu;kxyl2txn 7j(g+s a05 4gk pmC. How many more protons than electrons does this piece of plastic hg wp)+gypx z t:5ekujkkr7;n0o(3y 4l,sux a2ave?

  What is the charge on 1 kg of mjxwwr 5 /5v.yprotons?

  An atomic nucleus has a chargp. c x3nc56de-x.cs3dcs by9de 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 ch;e/ ds ct.yl /l+ra7nfarge values of 2.0 and -4.0 mC, respecty 7n+d l/sal;.ecfr /tively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a *jwvj)x/d ti.second charge, and the force between them is 1.0 N. Whaj)/tw*dvi.j xt is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 Ncc hr2gb6-sfu3c 6nn 5. How far apart are they?

  The force between a bxw b ;g3ovgm .o:7ew5$30 \; mC$ 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. I jr5i(y9kmz mz jec(+hp (y)n8f they are moved to a new separation of 8.0 cm, what is the electric force bet mpm)8y 9((+5(cnzzkihe jrjyween them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first c,4j t 5v*j,gdgvtol9r harge 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 the electrostatic force which acts on the charge at the origin?og tj59,dtjvl4r g,* v

  Three point charges are brbhxx) z r: 7xz2+g;j 7qut6aplaced on the x-axis. 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 thexj7:xq;2 zx6a+ugbt7 h rrb)z 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 thez);v9s 8w :7dhr / lcslwx spv+nqx1f3 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 the man7q ds +lv ;v9rx1/pc: lzsfw)wsx8h3gnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a squ b088r/kbv cqpare, and a second point charge of -Q is plp vq8cr /bbk08aced 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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.j/gh:3;dromr8 8x z;li+d 3ajy( r bdn0 nC is at (0, 0). g 8i hzrld3d/(o:m y 3adr;8r+ nxbj;j 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 = -tkp*d79 l4cs4 5pc 1iy(ohqr g1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatqp4 4lcp 79ithd5(cyr o 1k*gs is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placpse;8.48zo ez l*/;td xoawk,2w p rqied at the vertices of an equilateral triangle which measures 30 cm on a side. What is*s z4pqd8lxt.;/ker a8,p wzoo e;iw 2 the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are sjkhrf dyh-y:s5 klg -:f *i-0ceparated by 3.0 m. At what point, on a line between the two cldyshf--- f iy0k*g :h:5krjcharges, 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 ,x4bt0)1nen jnw k zyjr3+)pbthe 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 x4wb1jn))y kbn,znr3t+ 0j pe net force on it is zero?

  Charge +2q is placed at pw(0k )/on -sitgf;unthe origin and charge -q is placed at x = 2a. Where can a third positive ch wf nks;-ng t/iu0(po)arge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.b/ uv(zz0*0 tc9 svmpz0 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 ofyk*.oi qjf0 ;sk urr:, gravity by the attraction of a fixed proton some distjqiykrf.,*0o :sr k u;ance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common p ;s 4c/mu1dcrmoint by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forced r;m4s/cmu 1cs them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a cql+ydkm 50 g4ab8v9w uharge of +40e. What is the magnitude of the electric field a8klbvq d9 u4ga5y+wm0t a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of i+yac:jm,k: qthe electric field at a distance of 1.50 m from a 50.0-nC char ay:,jim+k cq:ge?

  A 5.0-C charge is 10 m from a small test4obl2utn1l 5m charge. What is the magnitude of the electrb412 nu5ol lmtic field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Whavx+gfrxo)1c 0 t is the direction of the electr 1xgc+xfrv 0o)ic field?

  A 5.0-C charge is 10 m from a small test charge. What is the magu eq/:job v nn.uka5 yuzr--qo:,,d c:nitude of the force experienced by a 1.0 nC charge.j:an -ye:oq5vqcn :uo,kuub/ r-z , d placed at the location of the test charge?

  Two point charges each hqnw5 s*0fa hj8oeeut-y 12mom/h 2xp7ave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field a2a *o18q2t7j5uwhpf /yesn hox 0em-mt a point midway between the two charges?

  A 5.0-mC charge is placed at thedle ;yf4b 2n8l 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is th8f;4dble 2lny e electric field at the 30 cm mark?

  A 5.0-mC charge is placed a,gaam(vrt cw)-/4egsbti 68v d8hlm* t 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 the two charges is the electric field ze/gbm8rligt 8c(e-,d vtva4 )6hm ws*aro?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. Wh3 gaiqxg 1 fv 81)zkk//m15j7qedawx sat is the magnitude of the electric field at the point k1zq7m 1q3 vi 5xgf1g/ sjax /k)a8wdemidway between them?

  Three 3.0 mC charges are mug e-r(l/hw :5f-hf4- xn elhat the three corners of a square of side 0.50 m. The las( e u rl 5fg4hx-mn-/lf-ehh:wt corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a sy+ 1uc(un(j:: fo-bsgi4abhd ide. Charges are placed at the corners of th(i +(afsyb:oh1 c-g4b: un jude 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 field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is plac: us)7uu a; +we ze).bls:ahhced in a uniform electric field. What is the magnitude of tsa )e:)sh;zuuc7whe +b.u a:lhis electric field?

  A particle with a charge of 4.0ux erju . 2qlg7+:l)cx mC 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 f8 7zjx:jibx5qield of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspenbjix :zq58jx7 ded?

  A foam ball of mass 0.150 g carries a -x(uezly/u ez) b3jo7 charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and7/z )e-o3uuy z bjxe(l direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +9c,n 2,nca+h, a cnxvt2.0 mC. What is the magnitude of the electric field 5.0 cm from the+, c 2vtnnach9,an ,cx sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the ela1dhftf4b k72w jnr42x0+ ;mteu;l cc ectric field 6.0 cm fr0ftc2 tm12rul 4; jk4hbnxd f7ew a;c+om the center of the sphere?