State the law of conservation of electric ci8h29tcdjvr7 o z uax. vjr96.harge.

  Is it possible for two nz*-f rfzsj unl 6)2:jtegative charges to attract each other?

  Is it possible for a positive and a negative charge t*xxh6d+hog cco, c 5xkc1n:42zqz3et o attract each other?

  A glass rod is rubbed with a pgq4qu/ f 51xhy/ma7zz iece of silk. During the process the glass rod acquires a positive charge and thf5h7qyau4/m1x/ qzz ge silk

  A proton carries a

  The model of the atom showsscbdntt s3q ( ;mv)j8 m)z-z2r a

  A neutral atom always qgo ,2u prpgjh7jn971nehu3h/g.0 qbhas

  An atom has more electrons h6*:x gm-tllwalp v;(m:we t;than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are re4-qwx+ ,5t8 e hn:b4db iyyjsyl5)xvl8u fu8kferred to ylv,xlx8de)jsfk n 4w iuqyhy b8 :55 t48u+-bas

  Materials in which the electrons are bound very loosely z h6x/ avemj/(v.:pleto the nuclei and can move about freely w:he/x(az vp v. /6jmelithin the material are referred to as

  A negatively charged rod is bro1;ajcgk- ofzqg8tg ,zv re* lc 73,han6on 8)kught near one end of an uncharged metal bar. The end of the metal bar fartko z)g jggoa6n3;c8 *vlkctzeqhar-n,7,8f1hest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B i9/ewz nr8 xe esru752ss neutral. They are placed near each other on an/e wuerz n82sx5sr e79 insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elect qlcqi3g 9o-jc;s6c/ hroscope positively?

  An originally neutral electroscope is p6qv4dq1k/x(c px(vxbriefly touched with a positively charged glass rod. The (4v(xpqv /cx61dqk xpelectroscope

  An originally neutra1rv+aq. d hkr8l electroscope is grounded briefly while a positively charged glass rod is held near it. After the glasr a.d1k+rh vq8s rod is removed, the electroscope

  A positive object touches a n(p0xm 0caabck8 4on n+eutral electroscope, and the leaves separate. Then a negative object is brought nearn( mxcc8k0na bp+a0o4 the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. Ao eq6elx wez2n*2 dj0r*put(l 6h+n f6 neutral metallic ball rolls straight toward the object, but z he j*6(p6n6d tel oqxn ur2w0le+2f*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 Coulomb consx/h78yr um nr:8 :jxtetant $k$, which appears in Coulomb's law?

  Two charged objects are 9lapo ..vi -piseparated by a distance d. The first charge is larger in magnitude than the second charge.li.-9vpp io .a

  Sphere A carries a net cn /+*x8iwtj ;gczzmgz 7 cqi7ca4x :(gharge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the+ 8*47g zz(mni :;/zccxtiwg7 xag jcq electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chargesqyc.q5vjyy*1t 8 dg-rv,k af*8b3d p r on both objects are doubled with no change in separation83v,-c jdg8tyrq y*r1*yf p5db.va kq, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces ofmt.e03c2+r fa)qxd 9fm(a lva F on each other. If the charges are separ ft ad03 x(.9vf)e+m2 cqamlarated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eacas g)n9; g r fkno6:tab+c.zw9h other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation dis; 9 t+nargoakn g.6bswz:)9fctance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sd 34rt3 ms8cpzeparated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the firzs4tp 3mc3d8 rst electron?

  An electron and a proton are separated bfcgu:ru0 rago dv 8x;s88a3a;y a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a secac f v:0dsgr u3g8;ur ;o8xa8aond electron is placed next to the proton?

  An electron and a proton are separated by a distance of pqr d.-2xp v1p1.0 m. What happens to the size o1ppr-vq.2d x pf the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at th- l d8/kl+aszvk/dw.xawi) :ce center of a square. 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 o:/c w. 8kivdl-sk)a/lwx az d+n 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 triangle.ut .hn da.))auxn5 yh2 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 placed at one of nh .5axt ).nuyua)d2hthe other vertices?

  Which of the following is not a vect do fe,cx0- 5ki/edh0tor?

  At twice the distance from a point charge, the strength of the epg3erl2m2hm) xjzc/ / lectric field

  Is it possible to have a zero 5 jmib78 ehge:tqgekh d8d5y:ob3t42 electric field value between a negative and positive charjdhb g7yk 8m5 b ogte452:3d8h e:itqege along the line joining the two charges?

  Is it possible to have a zero electric fipcgx *3kj0bck es;7*reld value between two positive charges along the line joining the two char3 g7kkx* e;0c*rcj bpsges?

  Electric field lines near psitive pointecp .qo/xwt .u:ae(xu :ff0cp,n9b ;c charges

  The electric field shoel,d+r0m x 77 )lky 2gi+ijuqgwn

  Can electric field lines intersej:d ev .b1x2dg-c7ry qyuz ;2i zyle50,+h ibkct in free space?

  A solid block of metal in electrostatic equilibriuqw39l kjd)mw1m is placed in a uniform electric field. Give a statement concerning thd w)qjmlwk193e electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diamu* ic0ycg :0eketers are each given th*ciye g0: uk0ce same charge, the electric field (E) midway between the center and the surface is

  A cubic block of alumin zr/cetu2:px,um rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the chargec r:pe2zxtu, / on the block's top surface?

  If a conductor is in eoe n;5:8sbk sg163ourlxm .ujlectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thasf;5btufirj3e:(t)d t is grounded. As cof f(5tt sd rue3)ij:b;mpared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilie16 q y7i0:jxc8fi;np4cfjgl brium.

State Gauss's law.

  The charge carried by one electron b,w ydq8lz3y* 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(s -kdo q a r1if55li -k(rcmtenv7vsu.i)i4 0. How many more protons than electrons does this piece of plastic have?40f r)iq . ksiksrau v1-7it-nc5oi5evd l( (m

  What is the charge on 1 pwo1 f4yck w *u5cbqs(3ka+rdn4/1p r kg of protons?

  An atomic nucleus has lk 7 2iea9)jjths m.3gj:0atia charge 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 chargouj+ p(mao;(f/m*2z fg vpa 2ne values of 2.0 and -4.0 mC, respectively. jf pmgz(* ;np+fuov2mao2a(/What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is-rrbrb uf3e8s o(tif-r5o2 o; 1.0 N. What is the magnitude of the sec(tfoe r5 irb ur-s;o-f 23ob8rond charge?

  Two 1.0-C charges have a force between them5 klkk)e z-(k0q/ fot:bg;hrl asq54i of 1.0 N. How far apart are they?

  The force between a f( 1r)0z,h) fa qji8wt(nofuw$30 \; mC$ 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. 33 czr-4ja/4a qyjrpf If they are moved to a new separation of 8.0 cm, what is the electric force qj4ra4j-pa 33f z rcy/between them?

  Three identical point m9k )pjvlq bl()rnb:82ebfx,charges 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 n:2be)kp)blb 8 q9,(vlf jxrmthe 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 charg2f g xlswly;4(u1sw)gtsvg , -e of +2.0 mC is placed at the origin, 21)4 gg,vg ;lsxls usyfwwt(- -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 force which acts on the charge at the origin?

  Three point charges are located ab3;nf/j glru o:9 mub7dw12lzt 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 the magnitudwl; f2j7b1u3grmb z uon 9:dl/e of the force on the 3.00-mC charge?

  A point charge of +Q is placed at .r+d)bc:jmhi8:4 ztujy /o l t *odoa:the center of a square, and a second point charge of -Q iad4tuj:ojo:z *tch+ l)ymi8:/bor .ds 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 nCnqc4-.ked c7 /8heggb is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on thebck-e nhe gg/qc.d847 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0);5yz6ao3mm ko 8 Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC cham635aky oz8om rge?

  Three identical charges of 3.0 mC wt ms78cb( - xr8q7zg9gfzx/f are placed at the vertices of an equilateral triangle which measures 30 c9(-8qwsz7 gx7 8 zftxm /rfbcgm 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, which are separated by 3.0 m. At goiz a+pm3*wywh 87:3skd c7 *qsel3dwhat point, on a line between the two charges, would it be possible to pedqy g*si 3pz38a+:w cmodlw h77 s3*klace a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin anhjd9b5jj u c(pq-8d0a d a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a t8jhj0u5qp jd9c d -ba(hird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and chargiuug. (j9 p4pbe -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is9.up gujbp(i4 zero?

  A copper penny has a moz feg,d 9)+fbw* )vwtass 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 thszojy:q-gez kg2 m1-ma,4o )g gj*-hxe force of gravity by the attraction of a fixed proton so,-gj:-e4o j1o gkmxs)2z-azyhq mgg* me distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common po8nb1 zj(vosk,i1:is guk/6 uhint by nonconducting threads which are 30 cm long. Both are giv/:bkj s1vokh u s8 iign6,(1zuen identical charges, and 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. What is the magnitude of the eleczn2gwb(dpjy3 eid,4,tric field at a distance of 1.0 m db j4,pden32,( iywzgfrom the nucleus?

  What are the magnitude and direction of the electric field at a distan6zv,c 4ny2ni q9 ,+irm8yqtwvce of 1.50 m from a 50.0-nC ch9iy24 vtc+nzmwq,i68r nyqv, arge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude ofra**i 7kq c,kt4 yux/y the electric fieldq4y ck/ * a*rki7xy,ut at the location of the test charge?

  A 5.0-C charge is 10 m from(v k4 t/ teascgv0(mq .lj2iz+mron*+ a small test charge. What is the direction of the electric fieok* (mm+lsrz(q 4.+tnj ac2tvg/0v ield?

  A 5.0-C charge is 10 m from a small test charge. What is the magzjj bx2/n:*rd nitude of the force experienced by a 1.0 nC charge placed at thn jbj/*:zx2rde location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by xb+jwu9s;4znd f/ gqyf -p;;za distance of 4.0 m. What is the electric field at a pod -nj+4 pgq;bwx9s/zu ;fy;zf int midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma.gd yvhx s1ro*m/3.xf rk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the gd 3v y* /mh1rxx.of.s30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick an zh 2wyv9*-fo/k kvs(xmus 88rd 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 w89v8u-*(/xkvyho szs k r2fm field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 mcag )- ,z6t2dm:ejhzw . What is th h2t-:agwm,dz)c ejz6e magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three cos+squf4w 2x aaojz*1*(c k 3kxrners of a square of side 0.50 m. The last corner is occupoxcj3uza1w*k*x2fqsk + as4( ied 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 side. Charges are placefj pxp9ug7er1/ vqlic0.s9,k d at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 k09jsle1rf 7cx pg,i u.v9/q pmC 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 a8*eyyjwfs ok31( 1 mda charge of 5.0 mC when it is placed in a uniform electric field. What is the magnmy *k s wje1(d3y8fa1oitude of this electric field?

  A particle with a chf cnh pc0j81r3arge 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 electrid 9o h(asu48w-bh kb+dc field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspenw8 do(sh d4b9uka-h+b ded?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is p str-*u6v icd6anu5 2tr btu5: gt9,uwlaced inside a uniform electricru:6uc-ttr ua*562 i wbtstn 9ud5v,g field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriewht y:s1k0 qc:e vvd(p,/h7f es a charge of +2.0 mC. What is the magnituw ,c 1(0dvt e:hhp:f yes7qv/kde of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a c k6eplb n(,qs)psgf./vl ox18harge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphere?s 1vo/f6)ps(e lb .lx,gknq8p