State the law of conse*f+j dtx6ve/1xra5hcwq:d -,e bb sr2rvation of electric charge.

  Is it possible for two negative charges to atvjr;.7d .f kfttract each other?

  Is it possible for a positive and a negatfhv x8hw,o9 sdk75;pw ive charge to attract each other?

  A glass rod is rubbed with a piece of silkhduhl*5r5 .j t. During the process the glass rod acquires a positive charge a t. dhlj5hr*5und the silk

  A proton carries a

  The model of the atom sho-3gzk:fvn/9xz/1 e-xyc np* 9krzwu qws a

  A neutral atom always c)m o s/kl0 41rsc)dx(d4cqp vhas

  An atom has more elem l607yuockzf g f9)c;rdh33ictrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuc oi;*n4gwo4 vulei are referred to a*o4;ovngu i4 ws

  Materials in which the electrons are bound very loosely to the nuclei and can m76ja tf1rv2at :ux+j bove about freely within the material are referred to as+ 2b6atj xat1j 7vuf:r

  A negatively charged rod is brought near one end of an uncharged metal bar./pdrfl78lv r2nwi 6,2-g n6xsb s)rns The end of the metal bar farthest from tvs)8 n g-lw7/ r nxn 6,sr26fpdblri2she charged rod will be charged

  Sphere A carries a net positive charge, and s u(t ll ri/bizg+ok6(*phere B is 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 corre(i r u(bz l6igt+klo*/ct?

  How can a negatively charged rx ;0fz:ricy xkj.wyp4a7. ta0 od charge an electroscope positively?

  An originally neutral electroscope is briefly fs;p 8ola p);y12o iwttouched with a positively charged glass rod. The electro2p;8 ypfl)s1t w;aooi scope

  An originally neutral electroscope is groupzs5 e69o cpxgg3/k/ r s/+)czep(nz rnded briefly while a positively charged glass rod is held near it. After the glass r/6sen/3 xr(kre/p g 5) opgpz9 szz+ccod is removed, the electroscope

  A positive object touches a neutral electroscot af2 jp,b-uspf-d77tvz )(gnpe, and the leaves separate. Then a negative object is brought near the electroscopeb-ftpfp72 (-g7dvt )uj za ,sn, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an inl6jy yisd ohzo,(f1+ +zd7 ao,sulated 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 fz oflis,y,j+1o7( 6 + oddzhayirst 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 of5vi f1/vae,p-r:w gd b the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are sepjpc4qbjxx )b p s a239:iyvb5(arated by a distance d. The first charge is larger in 92p xxj5bs 3ba)c:vp(4yq ijb magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Th:2r9*cj 0 njnoiysne0 ey are placed near each other on an insulated table. Which statement best describes the electrostatic force beti2e 0n:n jnrc9jyo 0s*ween them?

  Two charged objects attract each other with a certain force. 1 y538 l3j:kduq,t :nzepeibu If the charges on both objects are doubled with no change in separatub pl3:q3kezn,dt 18i: y ej5uion, the force between them

  Two charges are separated by a distance d and exert mutual attractive forc(vvu0- a)tqk(wue *zues of F on each other. If the charges are sepa )(zea uq(ku0-* uvvwtrated by a distance of d/3, what are the new mutual forces?

  Two charged objects acet(s/o)l3(dtol:r j8 gmp:b/ot 6)j5crixx ttract each other with a force F. What happens to the force between them if one charge is doubled, the other charge ist( :jcmxro8)5el 6j)gli :(oobct3p /tdsr /x 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 separated by a distance of 1.0 m. Wo ottb -v.0e(dhat happens to the magnto vd.-o teb(0itude of the 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 c1ipe;r;gn or+ cr a2o io e)(u;4p/wpof 1.0 m. What happens to the cw+a/rr) ;(gc4 op r o1ue ;;epion2ipmagnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated9l3ods, vqj36v.v wmi by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to ,q3jows9d6 ilm.vv v3the proton?

  A point charge of +Q is placed at the center of a s h2 s5xt*dli78o), 0mjz6 yv rs(qhfuzquare. When a second 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 pqvolz8y, 5h d s*suri2t (xfz6)0mjh 7ositive 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 equilate( dlmd63tubo* ral 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 magnt lmbd6du (3o*itude 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 not a vect3wzlc*vr708dg jxwh4or?

  At twice the distance fru/14k.. j9 uafrsdv0st 1tm ezom a point charge, the strength of the electric field

  Is it possible to have a zero eqh9 z9 )ux aa.9x)vdi r33vwsiejc*z0lectric field value between a negative and positive charge along the line joining )s u3x)i3z9jhidc v xe9.a0vwaz*r9qthe two charges?

  Is it possible to have a zero electricb mcex*mywgku0-uf(0(, o ;pw field value between two positive charges along the line joining the two charkf wu mbomg(,uep0*-c;yw (0xges?

  Electric field lines near psitic) b qgdh -2age7dp72a+i7msjve point charges

  The electric field shown l ubo9elidm9n14l.q :

  Can electric field lines intersect in free spac /)t7ghooxnj) m3l xp)e?

  A solid block of metal io qg.9y:h0n hun electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field nhh9o :y0.q ugin the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eacasc- 0byn::p br c*u(gh given the same charge, the electric field (0pa g cuby-rs(cnb: *:E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wh +hz,;0 3ur3ns0frof+ynyyhhc ez) h8ere a uniform electric field is directed straight upwae;30sc+hyfh,z y0hf)rn u+hnor83zy rd. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic)k x2ba; .yvsmgp b0l df)-o(n equilibrium near an electric charge

  A positive point charge isf7ai.ui : gn601 jcxpg enclosed in a hollow metallic sphere that is grounded. As compared to the c7 g:1x. 6pgafj0iincuase without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static q*iv5kd2h /us0rpur;equilibrium.

State Gauss's law.

  The charge carried bwjx4+f/: f 3 i4ejdmpmy 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 mC. How many qwlw5h 8-9dmwmore protons than electrons do- w9dwhm qw85les this piece of plastic have?

  What is the charge on 1lf k0i16gl-j odo)m3hm n0(zw oxgx qx97n6q( kg of protons?

  An atomic nucleus has a chargicc / +8qau3i,wd kac3e of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, ser bj70om 85buiparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitu0b mou7 irb5j8de of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, andz/ovj(q yd84w z*d(+:v.x:a sz0b 6 afsgthqm the force between them is 1.0 N. What is the m*dz (:sqj mz hgv f0ty vqaz.+a4/8 xd:w6(obsagnitude of the second charge?

  Two 1.0-C charges have a force between them of rxils *ru cac5 sl*xx 6 1f.28e(*ljdw1.0 N. How far apart are they?

  The force between a ) x gtn/sxwe2s*z82g /jlye5m$30 \; mC$ 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*1x+,yi.+b fq rz 5:egb twbyt force. If they are moved to a new separation of 8.0 cm, what is the electribbt geqi5f1zy rwy. +:,bt+*xc force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Thedssej ahl p3)w0:*ir0 first charge is at the origin, the second to the right at x = 50 cm, and the third is at the 100 cwl ji)ea 0hd: 3s0p*srm 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/uqkbv; srw y*vj:78zc )+pfk +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 k*)+bsy fvp:7j k zc;8rv q/uwmark. 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 posi w2r5c mp()/jc+ snztitions: 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 masc(+2wrn5mc/ ij)p ztgnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of o he omj-*b6n0oc/y+c 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. W6 co+ ecomh/*o0ny- bjhat 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 iimr sn.-rjn/3g k++wos at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of thi wg3s m.nk+r+r/onj- e 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, 0.10 m)ik15zlag7) ig ; Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chi)71ka lig5g zarge?

  Three identical charges of 3.0 mC are placed at the ve6 xt jk-:q.erartices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of tj.6-ek xa t:rqhe electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which akt5z 6x4zw9 vrpg,(bere separated by 3.0 m. At what point, on a lingzr6(bz94k, xwpe5 v te between the two charges, 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 the origin and a o i;lk6pyi0em/i(sh47eokt:y3 l6bg +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge eyeglipo/ktks7 ; o0: h mlby(i366i4be placed so the net force on it is zero?

  Charge +2q is placed at the pmr qkyyfu k(+;+: (hcorigin and charge -q is placed at x = 2a. Where can a third positive chy(;rumkq k: ycpf++ h(arge +q be placed so that the force on it is zero?

  A copper penny has ab3cc+mi-n*slcle q 28 mass 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 against the force of gravity oht* whc5a0 g-by the attraction of a fixed proton some distance above it. How far above the electr-oct hah5gw *0on is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduczz5bo c+h6;p /kz 9wbuting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is+z9c/6u kwb;5bp ohz z $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is thed;b 7+a( jw1 hgb cr5kwshjr0) magnitude of the electric field at a distance of 1.05 sjhh0)djcrrb bk1;(wg a+w7 m from the nucleus?

  What are the magnitude and direction of the electric field q-w :nvo2e6hmi g/6sray1p:nat a distance of 1.50 m from a 50.0-nC chna6s nre o/:g2m1i-wy pq6:hvarge?

  A 5.0-C charge is 10 m from a small test charge. What is the mag60 v/txq 4ozou* *hpqr1for(hnitude of the electric field at the location of the te4qr*hzv o/ 1uhpqt0o * o(rf6xst charge?

  A 5.0-C charge is 10 m from a small tesj. m; d6m5a 3nstuspr6t charge. What is the direction of the etajnm 6dps.;635 sr umlectric field?

  A 5.0-C charge is 10 m from a small test char j lwsg1,g 1 xr7dzmc*5gr08fbge. What is the magnitude of the force experienced by a 1.r fsb g1gw,1l8* rczdm750gjx 0 nC charge placed at the location of the test charge?

  Two point charges each have a value of gs w, p;6cpc,o3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point mi,,;cpsg c6 pwodway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark ofo2vi,c*w * oh 5ypii6f a meter stick and a -4.0 mC charge io*ihvc,52ypwi fo*6 is 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 cm mark2kxj9-z wpusmo8,gs. of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what g.z8swx9uo-,kj2m sppoint on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and ( d9g+e(33ty fzdzrxe-7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of thegxz(dre3 +y 9 e(td3zf electric field at the point midway between them?

  Three 3.0 mC charges 6we,dz0uh1jb are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. ubjz 0,h16dwe Find the electric field at the center of the square.

  Consider a square which is vyez08d9;f ho1.0 m on a side. Charges are placed at the corners of the square a0veyz;9df o8 hs 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 placed in a unax (d9n2;,o5yq 0u d eclpf9tkiform electric field. What is thcd(,f9a ;texln k9 u0o5ydqp 2e magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass obznip :/( 5 huptjao.9f $5.0 \times 10^{-3} \; kg$. 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 60 fy0tnu 6t7++ uouh8lr00 N/C pointing downward. What charge must be placed on the ball for it to be suo 8n6h+l 7+u ft0truuyspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is/(n9qplu)z pu r;**8 mcvhz fp placed inside a uniform electric field, and is suspended r;qu n(pm f9vz*8pul )p*/ zchagainst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm yh8jc -un. ( z-sxbgb4carries a charge of +2.0 mC. What is the magnitude of the electric -nubh 8bg4c yz.j-sx( field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chargei5k5g*n4cc.fsy pd. e of 3.0 mC. What is the electric field 6.0 cm from the center 4cgidc. k5pfse5 . yn*of the sphere?