State the law of conservation of elect9 d30zbwq5qcu7cdw 7dric charge.

  Is it possible for two negative charges to attrac4p bjcue4n7k2t each other?

  Is it possible for a positive and a nb gmkv *+0x*ep2-+ yb+up3xefyo1vfgegative charge to attract each other?

  A glass rod is rubbe*ttbdykcl(02t:- rs -6ix r kcd with a piece of silk. During the process the glass rod acquires a positive:t i(0ctyrkt6bsld- c*r 2- kx charge and the silk

  A proton carries a

  The model of the atom shows q,t1 c0vv l ;yt:fbngu,8( tw:c ox4zza

  A neutral atom always hasn d/qkmg4/4l1rngg a 8

  An atom has more electrons t o j6or0u;na,xhan protons. The atom is

  Materials in which the electrons are bound very n2vfrx b(0a y+*k ny;atightly to the nuclei are referred tn+ av *n ;yyfx0b2(akro as

  Materials in which the electrons are bound very loosely to th +sxtl3 2.j .-gmiyfzae nuclei and can move about freely wi.j-i.2 t saylgzf3m +xthin the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. - qm2/j-ck ;age *4 ezt ns(lgovhh()yThe end of the metal bar farthest from the charged- o/)v4 ts khye*(h-gemnq caz2gl(;j rod will be charged

  Sphere A carries a net positive charge, and sphere B isj u:cuy3 tqws8pl (9x h)c8bl0 neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with pchu lyb38w0 xl 8(tj :q9c)sua wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope+kgc.9 deb sgdgw)6q5i3d0 xm positively?

  An originally neutral electroscope is briefly touched with a positivel c2 zxuv0l01r5bbi jq-v8eh j+b+p*mdy charged glass rod. lzu*b1qrv- b2j b mhp+xv+5j0c d80ei The electroscope

  An originally neutral electqywkgk; 6i;0r roscope is grounded briefly while a positively chargeg;0q yr;kw6i kd glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a nv 2nnl8 j3:niknx;g)keutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Whax)jv;l32k8n gnik:nnt happens to the leaves?

  A large negatively charged object is placed on an insuofx e*d -*ak*;bza8ue4ph0yx tthss 1t2o()d lated table. A neutral metallic ball rolls straight toward the object, bux ee 4*8d0b1o *u(kyt h;)txaat p*shzod2s-ft 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 the final charge on each ball?

  Charge is

  What are the units of the Co5h z)g3wj 1x2 tfpha9v*(hsqculomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fiz0zr w0+r+45jh 9hn*yulpfrp 2 to.mgrst charge is larger in magnitude than the s4jh p5r trp z.lm00nwro*+g9f hyz+u 2econd charge.

  Sphere A carries a net char1,1yq 9i2a/gu9tbmdh yfwe w9 ge and sphere B is neutral. They are placed near each other on an insulated tableyi9b edw,2mw9uf9 a /t gqh11y. Which statement best describes the electrostatic force between them?

  Two charged objects attract each otmz6)l82, cps lio1cueher with a certain force. If the charges on both objects are do82 mcp i)1cls6ouz, elubled with no change in separation, the force between them

  Two charges are sepa dlb p+1q0 ng/-)mqninrated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3q)n b/qi+mngd1l0-pn , what are the new mutual forces?

  Two charged objects attra-j4fp,xp5y.iv wwshv0yno ,/t j, -wmct each other with a force F. What happens to the force between them if one charge is do-, /-,p.vjf5ntiw ws0ywx ,phv4ymoj ubled, 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 separatemkfiz/sv 3e/ 0kig)/m d by a distance of 1.0 m. What happens to the magnitude of the force/ m e/z0kmgv)ks 3ii/f on the proton if a second electron is placed next to the first electron?

  An electron and a protobw1d;, kr/m :vz2bu wln are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron islbk z/,1wbw2 ;mud:rv placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to e:om215mr 6 shdz;ymj the size of the force on the pr5mmj1ry s2 odzmh:; e6oton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squk iefl:o:( et/are. When a second point charge of -Qeeoi(:/ft :lk 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 the square?

  A point charge of +Q is placed at the centroid of an equilateral t7y.udg gcq.1 sriangle. 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 charge of +Q pl guy. q7dc1.gsaced at one of the other vertices?

  Which of the following il 3 hya71iotv)j v:ve)s not a vector?

  At twice the distance frozfut ,kmc nk8k8-.q0dm926vz/oq rlom a point charge, the strength of the electric field

  Is it possible to have a zero electric fieldfpppcee7 dj2xrkmbc:uz )-., *78u tt value between a negative and positive charge along the lintdu rubec e*)pm c8, zt2kpfx- j:p77.e joining the two charges?

  Is it possible to have a zero electric kvn9lstdhg6(qq1x; )+x k kp7field value between two positive charges along the line joining the two charpvq ltx+6 1qg(n)kk7x9 hsk d;ges?

  Electric field lines near psitive point chargestk s xye(a3k0/;abh.h50zvtf e. ck;h

  The electric field shzp-7 diaz-u +wown

  Can electric field lines 0a*ympj y6q;b intersect in free space?

  A solid block of metal in electrostatic equilizb5zcrnc z*+ 5brium is placed in a uniform electric field. Give a statement concerning the electric field in th55 rznzbc+cz* e block's interior.

  If a solid metal sphere and a hollow metal cpv6umu nx.irtm );8 11st 7besphere of equal diameters are each giveepvx18 )mtn7 6sc1t ui mu;rb.n the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests iy /gbvnh : zn 9xtmh0za i5,yq.6ex8-on a wooden table in a region where a uniform electric field i zy5zxn x/yat9iqg60.bmh-e,n:h vi 8 s directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nm6r4h9 wfj l4lpc d/o0ear an electric charge

  A positive point charge is p alv)hmb ho5fg *426renclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the elec*6hp2b olag4vr)f5 hm tric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibri 1bfk) k.tv :el/h8z9diqgt cw1zfz(5um.

State Gauss's law.

  The charge carried by oy7 coxqfp5(+9wt rvkd/kuu4f1r t0f0 ne 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 netqhuuzxs9t ;5, charge of +2.00 mC. How many more protons than electrons does this piece of plastic hav 9 ztqu;sxhu,5e?

  What is the charge on 1 kg o q9y.byket* 5zf protons?

  An atomic nucleus has a charge jqe /hh9g)xn9of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 10g dfq:bdk(s2 .5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude od:sb 0qk2 f(dgf the electric force between them?

  A 1.0-C charge is 15 mouef +sm ci7f3oo1b89bwyfb+.5v *xo from a second charge, and the force between them is 1.0 N. What is the magnitude o *3+f7fb.omvoc51ofb 9u i bwse8xyo +f the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart ar7ckauws6v:v,7k+g1 ygu 3 r s 9xxd(dce they?

  The force between a l:v0,ie6hm j q$30 \; mC$ 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.wjuae el( zim20f9a5d770 m7z kzt q*y0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force bae9ekz2zjiyaluqwz *0 57 m(m0t7f 7detween them?

  Three identical point charge5u 7vkxb/s9f cs of 2.0 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 the9vc u/5kxb f7s electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of ml4lydixp v85z71w4lld g 0(m+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 the4 0 d1mzxd5l l y4(8ilglmv7pw magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the folll;*rhqc 6ykbui 5nl;4w:*v oy owing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -15* iulk n4vcro:whyqb6*l;y; .00 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, anu g3*p; o*(aa sbtxu,kd a second point char*p s,o(aa3bkg*t ; uuxge 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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is a1rf y17:x2d nl;j1mgtr f rpw5t (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net forcen;2w5lrp1drr1:gfxj 7 y1 mtf on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC ygj 6ms) /(rw 4ifhl0 v9 o.bcsrj6y zj:1dm1his at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force 91j/viyl1mb)40gfz(. r wdj6j hhmo s cr6y:son the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertic9czcvbty2 s9hir2s 6qh ag: v:er82,ses of an equilateral triangle which measures 30 cm on a side. What is the magnitude 2yg,ircs69tvc2: 8hv: qa 9shbz 2 resof the electrostatic force which acts on any one of the charges?

  Consider point charges b)pyn 2:rj0jiil rbx 0+8of0etr*k)iof +Q and +4Q, which 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 that the electrostatic force acting on it woulr0yj0ki8 t*pni:) brj f) x20rlbo+eid be zero?

  A +3.0-C charge is at the ortq5gk,e-h:yb m 0t3 iiigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third cegmii:t -q0,h5 t yb3kharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2ac0n,,ylb- :zgp 4p8d3clq bvr. Where can a third posrycb4 -3dvg,qc8p b:p0,l lnzitive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total of r0vw la+bbv 0)$4.0 \times 10^{12} \; electrons$ 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 fi jn ;()p c5w,6irkv4n xi tiju4q0;ixpxed proton som wv5ixi;nj(;6j)4 kixiuqp 40 n,pr cte distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung 2ggbbzs.d24r h8ayt 7from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, aag 7byt2s4bg2z.rh8d nd 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. Whatd 3b gaqco-u*6 is the magnitude of the electric field at a distance of 1.0 m u- qdgbca*o 63from the nucleus?

  What are the magnitude and direction of the electric field at a dip.mjssl89 nk; stance of 1.50 m from js8l.ksnm 9p; a 50.0-nC charge?

  A 5.0-C charge is 10 m from a sman-z (-wecvp grh4/ *sdll test charge. What is the magnitude of the electric field at thze vh-pw-n/4gsr*c( d e location of the test charge?

  A 5.0-C charge is 10 m from a small tes-//8m rxjh m s66sunzot charge. What is the direction of the ehs6or8 6mums j/ zn-x/lectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magn01calxvmf p 5nm(o6:*h j yq2iitude of the force experienvyio56(pj:a0lcqn* mh2 f xm1ced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value o ze))2p ha(tlrf 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two char)( zlrh)2p ateges?

  A 5.0-mC charge is placed 8 a h0,tvpvig3mx1iv:y; r/ spat the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 c;3ivgm/v1t arx p i syp,8:0hvm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a k2y0ckihoxwt q0s;0.e3c :ky-4.0 mC charge is placed at the 50 cm mark. At what peck0tkihw: . o0qy23sc0y;xkoint 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 xt61lt3oa / s jch(ft9o = 0 and x = 0.20 m. What is the magnitude of the electric field t/t3fo(1ca6 s jo9 hltat the point midway between them?

  Three 3.0 mC charges are at the three corners of eitm6xjpl ,g-9 7h)yj 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 gtxe )jhimj -9l7y6p,of the square.

  Consider a square which is 1.0 m on a side. Charges are placed a9cshq2oo: j*z t 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); q os h*z2:ojc9 -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 l 8mwtb1 slj/+electriwml bs1/8j+ tlc field. What is the magnitude of this electric field?

  A particle with a chargfp o 5:,dkjbfdq./f(i e of 4.0 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 field of 69odb zg/wt)w21/qmo*w8xt c c000 N/C pointing downward. What charge must be placed on the ball for it to be su/x /mgc19bqwt two oc 8wd)2z*spended?

  A foam ball of mass 0.150 g carrif6jpw2(r8dv + u1ahhex +*atqes a 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 magp wfd*+a2hj8(h6a+ uqt vx1ernitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a ch/n:lom+*ru omc;, p cvarge of +2.0 mC. What is the magnitude uovpolr/: ;m, cc n*m+of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 8+rk (ek. wacycm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of (rk+yek8.wca the sphere?