State the law of conservation of elecky(jvvt.10zo he2c b4 wmk70ptric charge.

  Is it possible for two ne yuqa z;h5-nr4gative charges to attract each other?

  Is it possible for a67e s0, k.;arscsrejd positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During 4cvacm/+ *xyethe process the glass rod acquires a positivym+/axev c*4ce charge and the silk

  A proton carries a

  The model of the atomm b8cc9--2tbj rz bdl6xt/fq6 shows a

  A neutral atom always has6;fr( h6tnjmm,lz+kh e0x p 6c

  An atom has more electrons than2 k f.bf6lvd8i protons. The atom is

  Materials in which the electrons are hs1;esaj*mp +),iytp +gv0y fbound very tightly to the nuclei are referre,s e1f+ py0;htp+ *)mvijaysg d to as

  Materials in which the electrons are bound very loosely to thec .biwiji2 0cd 13sx-;grm v8h nuclei and can move about freely within the material are referred to asv2ijbsc h wi.cgd ri1m-308x;

  A negatively charged rod is brought near one end of an uncharged meta tfe qu5+:ojap72b ,cdl bar. The end of the metal d :2oqetb,u+ap c5f j7bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are omi8 c 5a/xa)dplaced near each othe/8doi5)m caaxr on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively c:ah4so uo5kx7harged rod charge an electroscope positively?

  An originally neutral electroscope is brieflhyqd)*b p/ e(ly touched with a positively charged glaspqd*b ye/) h(ls rod. The electroscope

  An originally neutral electroscope is grounded lp/iw 31epdhsybi f)/yx6k;5 briefly while a positively charged glass rod is held near lx;)fiype/51k s6wpy h/3 bdiit. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroo x jl3+qt,2rlcf9m o;scope, and the leaves separate. Then a negative objetmfr3o ol2q +c,9lx;jct is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutm ihktxu::je j6)2-cl w74bu bral 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 nega:wkhjbibx- c 62):4 7lt emuujtive 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 consj8e1 0mxr ta5-nmj94q5e rsjp tant $k$, which appears in Coulomb's law?

  Two charged objects are s 59pk6znnerng,2pk6e vas2 h ,eparated by a distance d. The first charge is larger in magnitude than the second cha6p ,r e2ven5 ,2skh6npk9ngzarge.

  Sphere A carries a nemr*c) v 3hn.*bt x47wr3editj1 tkr x;t charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electdx c3t)*4wb. trrie3hn7*jxmrvk1 t; rostatic force between them?

  Two charged objects attract each other with a certain fo4ekfe;y7we7xw n;n j/r376em ez /r jzrce. If the charges on both objects are doubled with no change in separation, the fo zjner7me37nzkwy; /eer6 4fxwj/7;e rce between them

  Two charges are separated by a distance d and exert mutual attractive forces l6u au -b2jx,aof F on each other. If thj2bu6, ax ua-le charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with ;qt;izp8t 6ttza,pg-vvg i/- a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now eq;t,- pg/6 aqi;i-tz8 pgvvzttual to

  An electron and a proton arbpu oa 4q48tbarr+u/ 5e separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed neuaro+uaprq b 4b584 /txt to the first electron?

  An electron and a proton are separat7 moyd0o) jy8ted by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second elec 8y)0td7o jomytron is placed next to the proton?

  An electron and a proton are separate3,0itnz w+s5 ;*rex bhgrn7 led by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is bw nilh,*nrs; e extg50+r73zmoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square.3 1t7(zj)dnts2 g,srt+qvhi v 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, i+rsvj2ts1,7d ng3vtz( iq)thdentical 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 c0jq5b hoqd .op );phd u:4y b.uby(k4of 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 center charge du.q(b dok u4jh54; phyoc)qyu: .b0pdbe to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vecovqs,upih)d- lej3ud6(+w (htor?

  At twice the distance from a point charge, th6njst mo (iz a5cuv/6)e strength of the electric field

  Is it possible to have a zero electric field value between a negative z s+ *j7qcm(guand positive charge along the7+( gqusm z*cj line joining the two charges?

  Is it possible to have a zero electric field value between two positive ch20x ig (7ljtvbarges along the line joining tlg7 bx2v t(i0jhe two charges?

  Electric field lines nea181 hsi(z2xuz kt a7xzb:-myf r psitive point charges

  The electric field showhuy8.f yc6.zlx, *qojk94 .9fvx izjt n

  Can electric field lin.2qkeori miaa-.ih4d)0c 0o,m tnb8yes intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed i*md-1/27 +h-thx rkpq(i(v a 0 oxrq4rv zzppin a uniform electric field. Give a statement concerning the electric field in the block's interio2td zpo4phrh1xr0viq /kr( a*m+ (-x izv-p7 qr.

  If a solid metal sphere and a hollow metal *- u/tc.sop:q;ok9dn l (z xsjkti+4isphere of equal diameters are each given the same charge, the enk + po .u/dstczsj* :9i-4itl;o(k qxlectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a b.owgmzmoft* x1 /v0epy x-.3 region where a uniform electric field is direct/.mfe-3zpox * vb1t.owx0my ged straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in eesx z/ l+kl0-tlectrostatic equilibrium near an electric charge

  A positive point charge is enclosed) bb(udzuzkw8f14m xp-mg(5 p*kgw )p 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 spherepm1pg-8 wxgb u5)(ku(w4p* dkz z)bmf has

State three properties of conduct5 dr-r fai6sdt/d6zi6ors in static equilibrium.

State Gauss's law.

  The charge carried by oo/171fpt z(s)xy tdep 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 net charge of +2.00 mC. How many more prot 29qb:0*yxqkbed a;tfons than electrons does thi2b9ed*0 y: b qtx;qfkas piece of plastic have?

  What is the charge on 1- 72 y-pzmjdmh.t b,qr kg of protons?

  An atomic nucleus has a chtxp g5arfz) ta agm* y*3:7pgrg/b :vw(pl3b7arge 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 anfrjil- kn6h* n5zk+tq-n dcpw*ei i ;.jw+7; sd -4.0 mC, respectively. What is the magnitude of the electric force between dkp7w +nqe*l;5cn*rst;-z- 6hj n +.i wfijki them?

  A 1.0-C charge is 15 m/ dindn; bk;h;4bjx* fcx7+qt dqv(y7 from a second charge, and the force between them is 1.0 N. Whd4fn+xb7*v;hc;t qxb 7(nk;q djdiy/at is the magnitude of the second charge?

  Two 1.0-C charges have a forci;/vtjtl0l u5h2k r*j)gk i ;ie between them of 1.0 N. How far apart are they?

  The force between a o:gt +wc.k eq.$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi q3x:je5sj /yxmm s75eence a 1.0-N force. If they are moved to a new separation of 8.0 cm, what i m e5e/:xysj mq5s3x7js the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The f6 b6lgw38 owxw xeq1 :ij*y8stirst charge is at the origin, the secon 6i lqwgseb*8: 31wtwyx8oxj6d 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?

  Three point charges arydwcnh6mp-h9k8r1f8w +; ohp e placed 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 the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on th cdhh fhporm-w+6 pw;188k9n ye charge at the origin?

  Three point charges are located at o m cio fv;- dp2(*bmzx;ml b6,qcg8+fthe following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at6fldq8vmz;p*bfb;2+(xgc- om o,i cm x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center oq 7)dgm 7vf0jof a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force o7dmjf0ov )7qgf 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 at4su dkdr+ul* 5 (0, 0.10 m); Q3 = 5.0 nC is at (0, *ru4u5d+kl sd0). 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 = -1.0 nC is at (0, 0.1yx/lypvs71c j+ k v x9+.la.ok0 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net forp /.+9okjv l.7k x+xl1yays cvce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of guj t5. t2u9qwan equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which actst5 9j 2.utguwq on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated c+w:s 19d i h*dvj5tukby 3.0 m. At what point, on a line between the two charges,cu1 wtd*k9:v+i5hs jd 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 p2mi6 ;a1 (sjrspnx e3origin and a +9.0-C charge is at x = 4.0 m. Where on the i;3epspjr (6asn1xm2 x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the ozlixf/ 89.j whjbey1 6wcer) 2ib gp-tvz. ;:crigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the forpl)ce;- y2 b 6vxzfe:rt98 zbw.1/igh. jwijc ce on it is zero?

  A copper penny has a .81lxsukoa o0mass 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 pfx-u)s) d -(3s o8dnxiii0fvby the attraction of a fixed proton some distance above it. How far above the electron is th)v8d)usn(xi o-dif-ip 3 xf0se proton?

  Two 0.20-g metal spheres are hung lmjj 5tw6emm5yre5 p2kx.1c l2nu 5)hh3eri+ from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces themxrm5 rhn1j+lciy 3lpe2. mwjm6 e )k55 5ueh2t 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 mnfxj; gmp7 4w,r93 wdpagnitude of the electric field at a distance of 1.0 m from ;dfp 9rw,3 mnx j4wg7pthe nucleus?

  What are the magnitude and direction of thwudu-vqdfx .4gr*7dte ik* 03e electric field at a distance of 1.50 m from a 50.0-nC *qrud7.tg4 * 0defuiwdx3- kv charge?

  A 5.0-C charge is 10 m from a shw(7m2 z.;rdz vr as5vud /11bihcm1g mall test charge. What is the magnitude of the electric field at the location of the t (rvgmwri./1szmza572u;1 1 cdvhbd h est charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction o4k8yc c*za- nkf the elecn-z4c*8 kkyactric field?

  A 5.0-C charge is 10 m fro/ybkl,o/t7 l(ako yet x4um0zt+sen2 b3f*2xm a small test charge. What is the magnitude of the force experienced by a0e*+ n4ouof7 b3ytt2y/x 2e,bk/zll m( axtsk 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated byu d(s8jx/,ngz a distance of 4.0 m. s ,8u(zx gn/dj What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a metqc9 9t u/i9.zg v3vs /*pxe8z x4spreaer stick and a -4.0 mC charge is placed at the 50 cm markz.a ce48qe /szv pv9x 9xi9 urtgp3s*/. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickf3d+/p9sktei1: lgbg6v y;js e8 kgm) and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joini)/9psvgk ke 8g:e1 ly3gsd;jmt 6fib+ ng the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed az;oooa8(x op 8gxpb87t x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poib8xzoo p8 o(aog87px;nt midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The sib+,rq + io, r9fwfg,last coqsfir+g , ,r9,iw+f borner 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 side. Charges are pla*65r6sd qc mpbs)ljq1 ced 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, 1). Whlpjb d q51q)rss6m*c6at is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a char7yq(2r)osxrcm luc 2 y57pcq:ge of 5.0 mC when it is placed in a uniform electric field. Whatxqcr(y52suclrm)2 :c7 yo p7 q is the magnitude of this electric field?

  A particle with a charge of 4.0 mC ha h 6gwylzpa)2q6 -cj7as 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 anmwd( dz74 +wci electric field of 6000 N/C pointing downward. What charge must be pl(4dw +cid7z mwaced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is . yi0m8r +c uvqqt.e7oplaced inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of or cvt me.q7.08iy +uqthe electric field?

  A metal sphere of radius 10 cm carries a cha,:en o (3owvhhrge of +2.0 mC. What is the magnitude of the electric hn3,(: vo oehwfield 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.040adtwwg/ fw z*uf+c1 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphered /gf tc0+1ua4 zwwf*w?