State the law of conservation of electric chae.b0d-xd jd ff pex1*2rge.

  Is it possible for two negative charges to attract ea l1 hr680 .-y;ac7 e6lrryzhplm5yqkm ch other?

  Is it possible for a positive and a negative charge to attux;/.m.ex hk aract each other?

  A glass rod is rubbed with a piece of silk. During the proceaaz)7j.l2g ;oci8emwtpn 7sekg 2 4)bss the glass rod acquires a posit)szgc4lt 2o;a) 7ke2wb jin8g7.eam pive charge and the silk

  A proton carries a

  The model of the atom h )ne;qyo68odq)c-ix v,i js5shows a

  A neutral atom always has pgk2 n omy(bc5ct07v:

  An atom has more electrons than protonsizn;yx)s6:;) 7apf4-w fn vutnn5 c sw. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refqktiwb 34sc 58erred 3ct8ws5 bq4 kito as

  Materials in which the electrons are bound very loosely to the nuclei and can moxwfiyt4vetpan ux:4 d 6:93yd0v fm2)ve about free)4mt padnf24w:x 3u yv06i fyxvt:e9dly within the material are referred to as

  A negatively charged rod is brought near on(0h s xnm*e-d-gzry 4pe end of an uncharged metal bar. The end of the metal bar farthest from the charged rp0xnye-(*-mgzs h4d rod will be charged

  Sphere A carries a net positive charge, and sph9+r-lzef.h hlr*lu )iere B is neutral. They are placed near each other on an insulated tab luz9le*i fh hlr-.r+)le. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge g3kgeh b9c j6,an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively charged rh 7u l0 rbgq7seq2fz k8bv)byy20*4g glass rod. The electroscopeh7 lqy u0sgfqzvgr) 4e*2bk08 rb 7yb2

  An originally neutral electroscope is groundbckph xq ) 10xi5d/1ered briefly while a positively charged glass rod is held near it. After the glar5/b0x dikp hc )1xe1qss rod is removed, the electroscope

  A positive object touches a neutral electrxii+m,0b9ggwd;;f h8 byyi )moscope, and the leaves separate. Then a negative object is brought near the electroschmg 8 b;;x+yi,g)ifd bw09yim ope, but does not touch it. What happens to the leaves?

  A large negatively charged w*oub7cv) /ctgu)fl: object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. f7utc)vg l/w)c* ub o: 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 C 0ng3gwj h04 pljcna190bgglf; trq98oulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is lat*.i mar i(c;rpya*r,wxm:z v3y g3d2rger in magnitude than the secoid(gvr; 2wc3 rp y3 i:mxt*,ra a*yz.mnd charge.

  Sphere A carries a net charge and sphere B is neutral. They are place(g7t r3a3h- a+ iftqojd near each oji aa-q frt3ot7 g(+3hther on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract eac ;zuwhi,o8bc6h other with a certain force. If the charges on both objects are doubled with no change ;hou w,i6 8bczin separation, the force between them

  Two charges are separated by a distanmam 2tc ;c-i-pfg 6 8y.sfg0prce d and exert mutual attractive forces of -r tigcmfy6a 0c.pp;fg82 ms-F on each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each otherz6;x8zsi yu)bk);dtblnkqrv 19 lwtx/( ip/6 with a force F. What happens to the force between them if one charge is doubled, the other charge is trik ziuq1)t;r8w6b lz/l i6t /)dp;by9s(nxkxv pled, 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. What h /doxov)h ):koappens to the magnitude of the forc )v)o o/dxo:hke on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distanceuhc9sp. my x;- of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the proto-uc 9.;hs pmxyn?

  An electron and a proton are separated by a distance ofjee49aqa ktjl ;km*)0 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m clla;t0 kk e4eaj9m* qj)oser to the proton?

  A point charge of +Q is placed atpvs7g k8tldnj u0r))k :)0mmw the 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 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 positi:kvu r8ln7m )wt))0 0jpsmdg kve charge at the center of the square?

  A point charge of +Q is placed at ht* d /i*voy7hthe 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 the th7i oyd* vh*/center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following israfz8 k ;+tx+j not a vector?

  At twice the distance from a point charge, the strength of the elect fw j7ulsg7/y*ric field

  Is it possible to have a zero electric field value between a negative ando :x2xb /,yiy 4plg 1wrm+w jfp6ug zh2w;3,nu positive charge along the line joining the two cha ,4p,yf; o:gyugr whm2u61 w/xlx2jb zni pw3+rges?

  Is it possible to have a z4h;j.+ m6m of hvmp1rrzf0ym a*;;g aqero electric field value between two positive charges along the line joining the two momz0;6f* h+rmmvp q1j;.a;a h gyf 4rcharges?

  Electric field lines near psitk- g38igs*d (fgbdwqga :g m,;ive point charges

  The electric field shod8,w)l/ f dgsiwn

  Can electric field li1m 86 gswvs1wt2tbg(wnes intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elect:t zt;+ n2ugf:4jrgp:pj d+gqric fiel:p g;2j+dr:4qzu gntf:tg p+jd. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere 2 8chebg+-e, wn qrty4k96 dywand a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midwayb n4+6d2yt yhg8rwkqew,9 -ec between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform eo/79)qk4pt ,gr; nh-4w: xhiyg rqw qelectric field is directed straight upg y hw;:/niqtp94,qorxe)4 rh7wg kq-ward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electeztvlf+n g5/w5 y w;/xric charge

  A positive point charge is enid*am0q5z+c mp4 k gii-yw)7bclosed in a hollow metallic sphere that is grounded. As compared to m7+z-w i ciy5p*aikgmb0)qd4 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 equilibriumxs sf9r5fyu5 ;.

State Gauss's law.

  The charge carried by one electron is *v5hi1 ak)e6 vq.p.zq 9) yw4wb oxair$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2011m5 0 1bj6l9hjrjxpm xt rba.00 mC. How many more protons than electrons does this piece of pjb916lhtj arm5mbp0 10 1xxjrlastic have?

  What is the charge onfdo*fi1g+ o 2s 1 kg of protons?

  An atomic nucleus has a charmplg45vq +v anus+q9 .ge 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 charge values of 2.0 and -4.0-*lf n8zs r +zsd ah8,7g6fglv mC, respectively. What is the magnitd6* slzvf,gn 8fgzlr+ha7-s8 ude of the electric force between them?

  A 1.0-C charge is 15 m ;l7/xdr1a*fr 5wdoei j29b yc from a second charge, and the force between them is 1.0 N. What is th*;7 lf ddxbyawe1/5rjoc2ri 9 e magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How fi/4smf;d0w(0 iatc nv ar apart are they?

  The force between a wha 0 0*igz g+x;*6s8mjizi dm$30 \; mC$ 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. If they a5u1g h.c,u ,(w1sqqe (qxm (e(xu bjjwre moved to a new separation of 8.0 cm, what is the electric forq( 1wcqebw,ugm .(e xusx5uqj((hj1,ce between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. T .d9nm7aoh:oe/oqh:xhe first charge is at the origin, the second to the rig9homndo/xo: . hea:7qht 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?

  Three point charges are placed on the x-axiavh i scz;3hro0hc5-1k rz;8ls. 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 the 100 cm8 -rhcz;hiz0 co1r s 3v;hkal5 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 the following7v-whf7;t vo 1vu kblak9*rr8 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 magnitude o;at*v f7 lrv8hbo9wrk7v -u k1f the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square/.(xcmp e9udu, 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. What is the magnitude of the force that acts on th d eu.9/(xcmpue 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 igmrn onv8+;e,0ro (zds at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the ; + dnoz,g0 e(rrvon8m5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0a; 7b6ithyse/ , 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC ch e6i aybhs/7;targe?

  Three identical charges of 3.0 mC are placed at the vertices of an equilate b4izei1s z/5cral triangle which measures 30 cm on a side. ze5/ c4bzsi 1i 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 separa 9nv4 +c1yfajgted by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -c f9gyj+na1v 4Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and toirvh36(2 ylx(b mc1a +9.0-C charge is at x = 4.0 m. Where on the x-axis v3ctly6h 1mbr2 x( oi(can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. c t6bw+7/y86oy7 ymkm khz;/(nfesa s Where can a third positive charge +q be pla bzos7ek/sf+n7m;(8k/t ym aywc6y 6hced so that the force on it is zero?

  A copper penny has a mass of 3.6-u*yls sg.r eo x0n7*ev: gud0 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 by the b: j.qr6 b hd*ae(ecg/attraction of a fixed proton some distance above/c.r 6eb jbg ehq(d:a* it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point1db 0 n5b6jc 9mlt8cb4omqh:d by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the thrl19cct0mbq65o mj:8b dn4bdh eads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What */tkhjw0((l htbi bs0 is the magnitude of the electric field at a distance of 1.0 m from the nht* (hlbk0t0(b /j swiucleus?

  What are the magnitude and direction3qcx -n,e19dorg qa 5j of the electric field at a distance of 1.50 m from a 50.0-nC charggn r-qc9e 35o,x jdaq1e?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of .s * /luens(yj(hhew+the electric field at the locationh(*u/l. +(sjhyese w n of the test charge?

  A 5.0-C charge is 10 m from a small test charge.g:pkn3k 3k7j)m/c rxfw2iz 4s What is the direction of the electric fielgk c7/2 nziw 3spkx)rj3:4fmkd?

  A 5.0-C charge is 10 m fr0zgkcaa fy22gqo y17/om a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed7 a2ac2o 1kgfzg0y/yq at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separatedne c4ll(bk5 (i c9f6 )(wqurdb by a distance of 4.0 m. What is the electricdlre5)bubw(((i49 lcnfck 6 q field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and j4wg(dmcj-i-zbq 0*s a -4.0 mC charge is placed at the 50 cm mark. What is the ele jiwcjz0(-b4qm*sg -d ctric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0i5 np2 kvc ,tyl8lr0o( cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cmlic0ryopl, 8(vn 5kt 2 mark. At 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 pl e07nx3t,ehl ud0 /rcy0s1pn vaced at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point mid30rnehxtdn0 p vl/ s,7y01cueway between them?

  Three 3.0 mC charges are at the thr9ly* 6y a 4xgx n/fkopyck.;.dee corners of 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 of ; kgno *f9cy6d.xla 4.pxy ky/the square.

  Consider a square which is 1.0 m on a side. o yqknw*ef-x)mx b9+- 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, 1ewb9n-* m y-f)xoq+x k). 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 uniforjy)1o( 2kmmis m electric field. What is the(ksoyi 1)j2mm magnitude of this electric field?

  A particle with a charge of 4.0 mCyscm8g pli.i 6y+ y-t7 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 6000 N/C poi(r2-cg5h q kmznting downward. What charge must be placed on the ball for it tk z2 -q(hgrm5co be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.0a1ypfcd.i /ouv(p v2;0 nC. The ball is placed inside a unifoi/pyp;uv2d cf(1a ov.rm electric 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 c0,t6 w*e2t t3s3+fmfu dfsmbk arries a charge of +2.0 mC. What is the magnitude of the electric fw3 t,fdfftektbss26 3*m+mu 0ield 5.0 cm from the sphere's surface?

  A metal sphere of radius 2. n)lb11 msr8ml0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center)lmm l1 n18bsr of the sphere?