State the law of conservati,-xyu l auw5q3on of electric charge.

  Is it possible for two negative chargesff3nkuq7u y 2 b8cd te26l4++ui tt2kw to attract each other?

  Is it possible for a positive and 18e*vl7w2 4ivqbc jdr:yr9gta negative charge to attract each other?

  A glass rod is rubbed wr-k2h;t mi(;ax4 zcdsb.v b8dith a piece of silk. During the process the glass rod acquires a positive charge and the m b4 v;.a cbsh8;z k-2ixtddr(silk

  A proton carries a

  The model of the atoo/fsk00y 6xzby uw42ig : lrp6m shows a

  A neutral atom always k8+j:n wn+med has

  An atom has more electrons thanx5nqlhwhj7 m jtb 6/ei - j05y4onz-g9 protons. The atom is

  Materials in which the electrons are bound very tigh-v8 mb,jllezam 7)67r6sv g vdtly to the nuclei are referred to asb7jlgmvz8,6vv r -dels7m6 a)

  Materials in which the electrons are bound very loosely to the nuclei and can m2v*bpxm2 ze +ncfq31move about freely within thfx b*zqpm 2e +31n2mvce material are referred to as

  A negatively charged rod is bro7u h*.i486uoi3)t hvoravw9wic b fh0ught near one end of an uncharged metal bar. The e)hiw4v9u uhvow.t8i*ar7 bh i36ofc0 nd of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge,7p4u3pm m8y*qy o25huu /:lq3dtl stu and sphere B is neutral. They are placed near each other on an i:puyd4*qumlh /238 tmu 35 stpuo7lqy nsulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charg b/aa by)zzyqun68v9, rs(o/ med rod charge an electroscope positively?

  An originally neutral electroscopnpahy kgd/3b2uw0* p 8e is briefly touched with a positively charged glap/0 3*2aubhgwndkp y8 ss rod. The electroscope

  An originally neutral electroscope is grounded briefly while a popex.ecg1w3suz1uh0 ;sitively charged glass rod is held near it. After the1s.w3 p0gu u1zxceh; e glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, andfw2 mn 1d6 1ugu xsij0)xzhm9. the leaves separate. Then a negative object ism11.zsuu ihx6)gd0 wnf 2 x9jm 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. yp,w2: : dg-eijm b6p-ir qjx( 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 first ball, and stops. The first ball rolls forward, but does not touch the negative object. At no time does either ball t imbwqe:p xj,- py:2i(-g r6djouch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constantlri)qop3 kd/sg (d;l+ljn tuw+s6n8 o+:il )n $k$, which appears in Coulomb's law?

  Two charged objects are-0gx-e p0ygn) mr: n olg1z8ir separated by a distance d. The first charge is larger in magnitung 0-empgxr: )ylz- r0o1g8 inde than the second charge.

  Sphere A carries a net charge and sph;r /q acq93 t2n:f6okq/ tvccfere B is neutral. They are placed near each other on an insulated table. Which statement be2o qkc/c v9qqt;:3tc/f6fn arst describes the electrostatic force between them?

  Two charged objects attract each other with a certain tt0.meh2.bar 9njos*force. If the charges on both objects are doubled with no change in separation, the force besmob..ne2ra* h t0j t9tween them

  Two charges are separated by a distance d and exert mut hi/y6z+ow*t tual attractive forces of F on each othery t/6+ ozih*wt. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other wi ti8 g2sit8/ :)vmgxsmth 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 val 8: t8igxmti2 sgv/sm)ue? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happen6snm+-z aw5on s to the magnitude of the force s+5z 6onw-namon the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens uk2ml1hqje48s fj,v 7to the magnitude of the force on the first electro,j84j7 luq2veh1mkfsn if a second electron is placed next to the proton?

  An electron and a proton are separated by a c 5 xv(4hbi -,kb2nmcwdistance of 1.0 m. What happens to the size of the force on the proton if the electr45xih,bv-mckn cw 2( bon is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When c/ngqa )oy0gyfi*.tep 4w35na 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 /yp.w )0*g qe4nyafo cg nt35iacts 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 triangle. Whqxakn:jk1s, io 6*b1men a second charge of +Q is placed at one of the kso1ka1,b6 jqx*:im n 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 the other vertices?

  Which of the followi /:ps wn(ln(v0k:rcom ng is not a vector?

  At twice the distance from a point charge, the strength o*x esj:8hi:) y*sqwbkizv )axwe0( z.f the electric field

  Is it possible to have a zero electric fiel x(:ifl1bep;y d value between a negative and positive charge along the line jei bpy1:lx(; foining the two charges?

  Is it possible to have a z4 tcooq yr;zyp : *zg,nf8d./qero electric field value between two positive charges along the line joining 8c,oo;/.y fpgq*zt4z yqr :dnthe two charges?

  Electric field lines neaa *lqi(:zkp x.9h6obw ote 5n9r psitive point charges

  The electric field shk nb9abyp 6nm-.cma. 4)j+ cyuown

  Can electric field lines intersect ink n9z.wn+ola7axh9d.(/,iw cn e az5x free space?

  A solid block of metal in electrostatic equilibrium is plac dw(yp :u +osp4h4s3wo7it k5sed in a uniform electric field. Give a statement concerning thes4s ypo o sp3uiw5w:dkh74t+( electric field in the block's interior.

  If a solid metal sphere and a)b,jpoa z7- ub*)hh:v:; mkiii/jwx2n u egq 2 hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway betweei aohniw xiv:pj2q*b-b zh:g kj/);7e, m u)u2n the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region+gp pv6g t;be.v2q7gk;gqr p68mx.mq where a uniform electric field is directed straigqg;v 6;p 7grm qeb2vmp.q.tk6px+g 8ght upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neipre*d. /3 za+stvuv;ar an electric charge

  A positive point charge is enclosedi xdd6x- p8mkueko(- ; in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field kdu ikxo6dpx- (m;e8-at a point directly above the hollow sphere has

State three properties of conductors in str 8q/t2n*zmwv9 xo.i ratic equilibrium.

State Gauss's law.

  The charge carried by one efswavzg9kn rsv7y3f q/46b8 8lectron 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 hd am yfq hk,8x(ome(48as a net charge of +2.00 mC. How many more protons than electrons does this piece of plastic have? oka (yfe q,h(dmxm488

  What is the charge on 1 kg o9c pw76oe0e o:iuh wcoo7*(tgf protons?

  An atomic nucleus has avblzq;u g 1f 9q:b*s.h 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 charge valu, tdiwb7q3 w+xjiwd x v7./7bres of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between the,7./vwbtw 77 rxwxb3d +jdiiqm?

  A 1.0-C charge is 15 m frqasqoak :sfc8 17 z*2v(ldzt1om a second charge, and the force between them is 1.0 N. What is the magnitude of the so vq *7lk:a1aqzt8s szd(21cfecond charge?

  Two 1.0-C charges have a qgf5l8ow/i. f force between them of 1.0 N. How far apart are they?

  The force between a szjsdc v2*v 0.$30 \; mC$ 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 fo hk5oxjp;*z 3ndc:u3q rce. If they are moved to dkn*oq5zj:hu 3;pc3x a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC ar qf,uqtx(v5pf9. s9 +q ltrz8je 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 ars 5lx,+rt. t(pfjq9fqq zvu 89e the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axifqvk:/:8zwbgmwxz x,:j 2 uc:s. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and 8wmz:qzb: f:j/x,uk2w cvg x :+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 at the following k2c o.r20,- b:lydeqenuu ga;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 of the force on the 3.00-m 2y.oak0 q2le;dg r-ue,u ncb:C charge?

  A point charge of +Q is placed at the center of a dt3+xau 9+pbi z.u ag5square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an elb5.gat+ xi3p dauz9+ uectrostatic 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 at (0, 0.10 m); Q3 = 5.0 nC q wvm:;,b2b *scsh0+r mfitz /is at (0, 0). What is t:,+*h cf2 /rsmszqi;t 0 mwvbbhe 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, 0.10 m); Q3 = 5.0dg; san )65* ratdxd8x nC is at (0, 0). What is the direction;n6*)sd5x xtgard8 a d of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertic .n5/wf rbhz,djd1z6zes of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any oz z5h dj1dr,/bz nwf6.ne of the charges?

  Consider point charges of +Q and +4Q, which are separated by +7knpe3mqtf .3.0 m. At what point, on a line between the two charges, woul7k. q+3tef mpnd 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 + ( ,-ghspfazve :-de)oa jl*j+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed*:e)(sgeav --j pfhol a, dzj+ so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where can yqy; +sr wp6vh.wd*o; a third positive.qw+ py*;dhvwoyrs ; 6 charge +q be placed so that the force on it is zero?

  A copper penny has a massk ii vqd++u6a k8l rk+4jn/,oi 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 by t eixzw: zs90;the attraction of a fixed proton some distance a ;0zx wizst:e9bove it. How far above the electron is the proton?

  Two 0.20-g metal spheres are-rh6r 1yuj-cz yxjv-xh-(:m c.;enpw hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle bev yr--6uchr1-:ymxpn-xchjz jw ;.( etween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What islsnn1; z ,fl*n the magnitude of the electric field at a distance oln1; l*z ,fnsnf 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance owz3xqw+ -gc:1 s/ igjm niv+k(f 1.50 m from a 50.0-nC chav m+:zwcjnk(gg-+ iw 3sq1/xi rge?

  A 5.0-C charge is 10 m from a small test charge. What i/3jh89 kdon0rzjy mg4bw3 k l(s the magnitude of the electric field at the locatio/834on0klr(jhjbzkg w d 9ym3n of the test charge?

  A 5.0-C charge is 10 m from a sma-.yu fgpujfi93v i e.;ll test charge. What is the direction of the elect e 3jf;i..vp-uigy 9ufric field?

  A 5.0-C charge is 10:+do n(pra( cb m from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed adpna(+b :( ocrt the location of the test charge?

  Two point charges each have a value of 3.0 C gl8 -(gi-;kf mxm,ttq and are separated by a distance of 4.0 m. What is the electric field at a pointf-m( k t;g8gt lq-,xmi midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark o*i j1cbcvg )56;mmbyzf a meter stick and a -4.0 mC charge is placed at tj*z5vbcgc;yb)6mm i 1 he 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a nbv /7xvb q17)3 tn,h w.eqaupmeter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the elecvbnxave3)7qubt1 p,7. n whq/tric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 g1ax xj-* d1;8( zy+yi.of ldhx3x jx* qqs1sqand x = 0.20 m. What is the magnitude of the electrjs*x(h+ dqx1.qy yxd-fa zxq;g13ljxs8 1 o*i ic field at the point midway between them?

  Three 3.0 mC charges are at the three corngcwhz5*m5t: n ers of a square of side 0.50 m. The last corne*5mchn 5gw: tzr is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square whi5thw, lb0xthm ,e0 ij.ch is 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 e0twi,l,5 hxm b.0jht 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 o9tnfv h0y2j, yn a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of thif nhvyj9y2,0t s electric field?

  A particle with a charge of 4.0 mC has m zrirt/yu0uf(37qe+ 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 fiel t e6r3ea6)xh5 x4atkod of 6000 N/C pointing downward. What charge must be placex3eta5th x o4ear k66)d on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.y;i)w bz7*.mluo/hjytqh+ y2s o9/fj00 nC. The ball is placed inside a uniform electric field, and is suspended zq7o/s/9yht; *.+joiy) bjwy2hulf magainst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cuq( ;/k gs;d/44vn i hfd.bpzfm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from th .d bdu4;;zfq//4 hfkpn(sgive sphere's surface?

  A metal sphere of radius 2.0 cm cadpqbc(o y /;xfc0l2qf bj.6u/ rries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of t/62fdbb fjquyc /(oqlc0.px;he sphere?