State the law of conservation of electric char ol8nc0 ees-t) w5qaaexsit;to)o-:.ge.

  Is it possible for two negative charges to attract each obg+xq6 iq )-eu d9/.ki: affbother?

  Is it possible for a positive and a neg4jar(ic:i q3m dul,c5uij:4 3 r hum+bative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gla j;)-d95apzdqklx8mr ss rod acquires a positive ch d9-lxzqa)m 8p;5kr djarge and the silk

  A proton carries a

  The model of the atom sho*r asw u .ie 5ftklot5od l:1i77gwx*8ws a

  A neutral atom always h;filj8z/ +uwqas

  An atom has more electrons than protons. The atom i vm8so zlv1;v ,w9a5eds

  Materials in which the elect4 6sl t/9sbffrrons are bound very tightly to the nuclei are referred tobffls4r /9ts6 as

  Materials in which the electrons are bound very loosely to thee5c go6q92d, vssf)ci nuclei and can move about frv c igo,)62q 5ef9dscseely within the material are referred to as

  A negatively charged rod is brought near on.o ,auoh z7g;.e.osfue end of an uncharged metal bar. The end of to .;o,7.ozfs ea uhgu.he metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral.k -n2jrpzoj9. They are placed near each other on an insrjp-2znkoj9 .ulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charj0w nff+fr:8h c: dsk:ge an electroscope positively?

  An originally neutral elvdhj- iu1iocq 5gtim x.0jno/(l +3t8 ectroscope is briefly touched with a positively charged glass rod.vdic l tqoih 1+x0-8/nmj(ugo i 35.tj The electroscope

  An originally neutral electroscope is grounded briefly while a positively chj2 ovqbu8r-2 ,gkf(liw7is 9ck 2pj+g arged glass rosk(lg7i,pgi 8o22 9c2jujqrv-fbk+wd is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. )8 q /i,r9enn4yoc89x x)s1buxlqzvt Then a negative object is brought near the electroscope, but doeunrx obcs8t8)4 n x9l/,i19 qvy)zq exs not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A n xct +snl)k. xb;)fwkfg6* w0reutral meg)k0flx nwk rbt;+ 6w)c.f*sxtallic 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 touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the t)izuljvlwv..t-)fpo k.ec ,)v 7bro/*ac6 e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance 9t3e-.kgv5 c bif+ewqd. The first charge is larger in m3fkebt v .w5icg-q9+ eagnitude than the second charge.

  Sphere A carries a net charge and sphere Bes/l: )sa;qhj is neutral. They are placed near each other on anqa:;s j/hs)le insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a c2 q5ej+)a/jcwuh4ej)zfmj9hr qh2 8tertain force. If the charges on both objects aqrjjh5 +j)m8h ef)j e4 2aczq92uw/htre doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutu13r6 r swl8l yt l2/fehrnx93hal attractive forces of F on each other. If the charges are separated by a distance of d/3, what are thlr wl39 / 6trsn281lefhhxr3y e new mutual forces?

  Two charged objects attract each other with a force F. Wz:ol 4k1v9ja +/kc aqw scie59hat 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-fouke+k: w1o vi9a9lqs45 zcjc /arth its original value? The force is now equal to

  An electron and a proton are sh nz15 vl*te8leparated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a set z1*lv lnhe58cond electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. .9immyi+ xvqp4 l ukqilewa ..+*1mn+What happens to the magnitude of the fqeny vi wi*+xlp4+.k+m9ai .lu.1qmmorce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 mrk7ygzixia x o (c2+.j(: zp9z. What happens to the size of the force on the proton .oaxzjpzr2 i c g(+yi:x79 z(kif the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed:jko g/t:vrw s/vj 5r: at 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 chak/wovvrg5t s/ j r::j:rges 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. Whenpb 66shlzq f-)qgv0r2 a second charge of +Q is placed at one of the triangle's vertices, an elf6ph2lq) zr0- sq6bv gectrostatic 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 following isdu *gm0u /trr2 not a vector?

  At twice the distance from a point charge, the strength of the elec4et2st 0te)ebef :q2ztric field

  Is it possible to have a zero electric field value between 7x wu: efq3 oz81qv,n(1jleida negative and positive charge along the line joining the two charges?uex qq n 78l1(fjz:,i ed31wov

  Is it possible to have a zero electric field value between two positive char7doy ;b-6 l0aaiynk /iges along the line 7ao d;/6ki-a0lbyiny joining the two charges?

  Electric field lines neajuz8gml ;0l g/r psitive point charges

  The electric field showng -ux :j03jp.0k,s 5qp psnmrl

  Can electric field lines intersect vg))2oy 6/i)as b oazik*,wmq in free space?

  A solid block of metal ezk7;e 2xi d-zin electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric fie;7kxz zeie 2-dld in the block's interior.

  If a solid metal sphere and a hollow metalx++l6k dojvq: sphere of equal diameters are each given the same charge, the electric field (E) midway between the centeq:kxjo+l6+dv r and the surface is

  A cubic block of aluminum rests on a wooden table.f +nqsue + 7ul3+2*eq8pil yt8el hrz in a region where a uniform electric field is directed straight uy l7 qs+.*8 e8+eetihpllr3quuz2n+fpward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an eleu)t7/9edm, wpc jz 7a3nqi 1odsbb88ectric charge

  A positive point charge is enclosed in a hollowzs:h 4srpt* *w metallic sphere that is grounded. As compared to the : *hs w4zpr*tscase without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of ryum k74gor7henbn e)9s16a)ur- -el conductors in static equilibrium.

State Gauss's law.

  The charge carried by onz891 9g7s ibjma+vq sv8 - dk-ud4jrhne 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 c /qkeky9,dz vp k3wva9iqo9)2harge of +2.00 mC. How many more protons than electrons does this piece of plaswda9,i9vo)k q9eq3vkz2 / kyptic have?

  What is the charge on 1 kg of protouos/xtcb).zb5;; ab xns?

  An atomic nucleus habk;zpc7 8nt j7pa 9r;haq0)l +vu8 uovs a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, se. krz(/ avs t+x7wrbh8parated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force wb8x7a/ +(r stzrhk.v between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.09keh,hjf h29i*-q m2i3qnfxc N. What is the maq22f n ,h* 3 fe9hxji9h-ckmiqgnitude of the second charge?

  Two 1.0-C charges have a force bwt, d tg6w3yx-etween them of 1.0 N. How far apart are they?

  The force between a w mc3)4yp4is rpk 7 +p76bmafd6obsh+$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, q l7koelzk8d7 8 .n/f38agu+0 grtlcvexperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force 03/lut8g+ qf e8kclrdna77vg 8 . zlokbetween them?

  Three identical point charges of 2.0 mC are placed on the x s7 seou,zzw-3-axis. The first charge is at the origin, the second to wu3s,z-e o z7sthe 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 are placed on the x-axis. A charge of +2.0 mC is placed 4jff-s s( )ycs,3st,xri z1mnat 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 forcefs1z(is)jx 4tr,3f ,my sc- ns which acts on the charge at the origin?

  Three point charges are located at the fold4n 03 8wg qyyc i(lo)kwc0wr.lowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 dc 3y roygl8.kw0nqc)i(w4 w0 mC at 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 of txcq n1 ,pg q3**rx jfrpszcc.i.k495 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. What is the magnitude of the force that acts on the center charge if a g cs35ic,91r k4*xx jp qcn. zpft.q*rthird 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 eo7c1o.he2vh xjg9di 9 )l:o u= 5.0 nC is at (0, 0). What isej h:v)9o1uoce l7 d go.hi9x2 the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0) bkam9e7:bn3 nlln 0brk9j18x; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of rlnm nx9jl anb3be 109k:b8k7 the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed2m0cs +sov5+h7 ukm ez at the vertices of an equilateral triangle which measures 30 cm on a side. Whhe5m+oukscv 7sm 2+z0 at 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 what puwng q7 lxlj/-n sp;2au0a)r9. jy fa4oint, on a line between the two charges, would it be possible to pu9n2;xaj rs g4nq uflw-7) 0a.lja/pylace 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 +9.0-C charge is at x = 4.0 m7mi1rcz n op7p) /)sai. Where on i7n)osr i )1cpp/7mzathe x-axis 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. Wgpfe5 .axfqtx*mk kh.a g h-,:f59q9phere can kpgm .fqa.g* ph: 9,9xeqaf f-tx55kha third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of vk8,cf ( -b6y2i npfza3.0 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 fax.v* +a2 sevmba */lporce of gravity by the attraction of a fixed vpl*/a as+m2.eav bx*proton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threue, 3dkyx;dg: ads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle bet ;x3y,dgk:due ween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40jw u, tyz8or7,e. What is the magnitude of the electric field at a distance of 1.0 m fromry,t 7j ,u8woz the nucleus?

  What are the magnitude and direction of the electric field at a di( tq4etem v(5ystance of 1.50 m from a 50.0-tmye( t45q (venC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magtyi2xnqz*i,k t *tff(i0 )e1anitude of the electric field at the location of the fne*t)2y,tf kaz( 0ix*1t iiqtest charge?

  A 5.0-C charge is 10 m from a small test charge. Whatl +w2si::c(:ipeq jlr is the direction of the electric fiesipwj:ql e c+(r il::2ld?

  A 5.0-C charge is 10 m from a small test charge. What is the magw4g 3*jzp sain1l:5 lonitude of the force experienced by a 1.0 z5lawg 4p31:o*ijls nnC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separate/enw 9op/bs;m0 vvv3 qd by a distance of 4.0 m. What is the ele ;bv nm30q/9w/v psveoctric field at a point midway between the two charges?

  A 5.0-mC charge is placed at (jf xr79kpj zgh. z-l3the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is pzg.f (kjzh39j-xrl7 the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a hk;0ija 11dtme(vum3-4.0 mC charge is placed at th0 umedtj1;1k3v hm ai(e 50 cm 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 o,+ a sjf6znpk1+3dv0d m/v3kyeo l-nare placed at x = 0 and x = 0.20 m. What pedvn/nf ,ao1okmd0j y++z-33 s6klvis the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners ig-htu9e+t x: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 the squareu-hx9g+: ite t.

  Consider a square which is 1.0 m on a side. Charges are placed at thq /hh r.srx)/ce 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 x .qrc )//hrsh(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 5.7yox k* ssel04yr, 3zg0 mC when it is placed in a uniform electric field. What is the magnitul 4*,s3s70xy oegzrkyde of this electric field?

  A particle with a charge oucex)vl/s0e 29j di*n f 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 plac( rmms.e796uw*khr7vcd ts:t ed in an electric field of 6000 N/C pointing dow(rtt w .s6 s*7me7mu v:chkd9rnward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carrie;o+c9 -+ zyctxy v:) u+sx 7iomx h.qa(2cddfls a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of grsxf(u aycl9c:xx+z; d cdy v.72ith- om+q )+oavity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is od;+ka4ut*ah the magnitude of the elect kdaua4h*; o+tric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is thavmsbbv87lj3l + v+w2+th+koe electric field 6.0 cm from thelm+av2hk+olbvj+ 8s v7 t bw+3 center of the sphere?