State the law of cons- tiab)93.k2i- yz cukykge:dervation of electric charge.

  Is it possible for two negativyfa:0 be2cdm 2e charges to attract each other?

  Is it possible for a positive ant3t dbh h20 ier0.m t:uf;(isgd a negative charge to attract each other?

  A glass rod is rubbe whpb /;d; pyged+9:jjd with a piece of silk. During the process the glass rod acquires a positidb+d;h;y ej9wjg/p p:ve charge and the silk

  A proton carries a

  The model of the atom v.bsuo8n5t ;x shows a

  A neutral atom always hfc ,f1(0c uqmuas

  An atom has more electrons than proti,qp -cr2b l.yons. The atom is

  Materials in which the electrons areary7ard2/z(i /:nbb pkv 8gf8 bound very tightly to the nuclei are referred tr 87pi8gb na:dzr y/a2/vkfb (o as

  Materials in which the electrons are bound verh(gz+.xkpee n (fyr)h13 :iqyy loosely to the nuclei and can move about freely within the material are referred tof: hpx(q ihy )y+.1eerng3(zk as

  A negatively charged rod is brought near one end of an uncharged metal bar. T8;z5lk)y3b p q8zj3 4szlqserhe end of the metal bar fartezkql3;yp) 3s zrs 5lb z8qj84hest from the charged rod will be charged

  Sphere A carries a net positive charge, and h9no rnns826zsphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched n2s 69hoz nn8rwith a wire that is grounded. Which statement is correct?

  How can a negatively charged ron5zgcy- gg2h -d charge an electroscope positively?

  An originally neutral electroscope is briefly touched qxlwh*kw 6p 4t77k4.3nw+g lbb yg5nxwith a positively charged glass rod. The ele.nwywl 3twngkx h4l6k4*x 7g5qbb7+ p ctroscope

  An originally neutral electroscop0 e7 tbrs;j m*j1/zuyce is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electrosco;1*ub/7yj esjmtzr 0c pe

  A positive object touches a neutral electroscope, and the leaves separateb5s omlch .l7,y.chl2-ek8sx j(ybr 3hy6r6m. Then a negative object is brought near the electroscope, but does not touch lk -y hl,my.r (65.bclsc7j m hh2ro byes8x36it. What happens to the leaves?

  A large negatively charged object is placed on an inhu 2oq 2uhp4i /lj-+ozsulated table. 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, strikesu- ophj/2iho4lqu2+z 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 0l gkqh. t 5b9p5rtj xeg6d4i8constant $k$, which appears in Coulomb's law?

  Two charged objects are sep9k ,olul vu1w ic qcxh7xs*g1/p 9t0j3arated by a distance d. The first charge is larger in magnitude than the sc3khvxu wq 1l,xs01 9 *l7toucjig9p/econd charge.

  Sphere A carries a net charge and sphere B is n*x/ q6 ;rqrzbqgnu:+ ceutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic forceq/c q xbrgru*+q6 z;n: between them?

  Two charged objects attract each other with a certain force. If tqd 8n3d/sil(g he charges on both objects are doubled with no 8gls3iqn/d ( dchange in separation, the force between them

  Two charges are separated by a distance d and sb0c faxa4u;-exert mutual attractive forces of F on each other. If the charges are separated by a xu0faba4; s-cdistance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to biir*4:x+ cj;/vg ugv the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced toi+b g* :jv xirugc4v/; 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. Whw- qm60j1kcd sf2,+z aqczm;mat happens to the magnitude of the force qz skd16w-m2mcjaf ,qm +0;z con the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a di3 gyj*riw3in;1am 94 e-zawzwstance of 1.0 m. What happens to tj i-ewaw331gz n9a m*4rz;y wihe magnitude of the force 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 m. What h9x ul (zd iy, bg;;x2vh5+kxzwappens to the size of the force 2;;+dzxvh9, zix xg5lybwuk( on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. ku8dg hmfp8suq ;5-2/g 90q2zo rctqd 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 d o08 s2h-gf pqkrugzmu ;8q9t5d2qc/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 kerqe:xgcvbq9j3 ,/eu6 6q2 wis placed at the 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 center charge due to a third charge of +Q placed at one of the other ve6: qbq,jrw2ckgq/ xv euee93 6rtices?

  Which of the following is not a vaqc8zpdc u4r4zu 906/ ywh 0kpector?

  At twice the distance from a point charge, the strength of the electrw +a .g.xtxovjq+/m4 hic field

  Is it possible to have a zero)th5psrsw; 3e electric field value between a negative and positive charge along5ht w e3ssr);p the line joining the two charges?

  Is it possible to have a zero el8otd8rb,1 jx tectric field value between two positive charges along the line joining the two chargex bo,8dt jt1r8s?

  Electric field lines near psitivhh uk0k xgn5tl*e+wlg,e38c 6e point charges

  The electric field showprlu* kkx1g0mb)53b5;vh f+ciu5 qv wn

  Can electric field lines intersect im(dedr eo(k)+h* wjy2oz ; fr1n free space?

  A solid block of metal in electrostatic equilibrium is placed in a un2b0fovxs-uy7 vl km;( iform electric field. Give a s y 72fbum(ol-vvs; x0ktatement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equl);)c m1 f5zhl7pokf pal diameters are each given the same charge, the electric field (E) midway between the cente1 k)7) plfzop;hlfmc5r and the surface is

  A cubic block of aluminum rests j7by-/dbiwa+l9 e2 qpon a wooden table in a region where a uniform electric field is directed straight upward. Whe7 /aw2dyqli9j-p b+bat can be said concerning the charge on the block's top surface?

  If a conductor is in eleu x1f8*htx aioi9)5zectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groun4sc e8;(ah yg s* rzt-t5i*pssded. Ayth-er*t(;*8 5sssp za4c sig s compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conducpiq2me7 o ;.eytors in static equilibrium.

State Gauss's law.

  The charge carried by one elect) .4mm /a riqgo+,njg0qtiqa7 ron 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.,*v3jbksqz f1(t4nxe00 mC. How many more protons than electrons does this pij e ,3v4*zfs(kqxnt1bece of plastic have?

  What is the charge on 1 kg of prot6t u9qh7g vd(sqg.qy:ons?

  An atomic nucleus has a charge of (*:31ctuh.to sclccxcjdn3y i:e )4e $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated 6 s epv0ywh /7+2r 8ahpphjcc/by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectivelyhpy7v e2/rs8+jc p c/hhwa6p 0. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m fromx/+sw jx;m cadh8) +lm a second charge, and the force between them is 1.0 N. What is the magnitude of the second cm/sadh+cxx+; )8 ljwm harge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart zyuxh:+0x/ pi are they?

  The force between a c womh/+7ie)(un5,d vc jcz *a$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart,p77i;3lisl zwtn(b66c 0e5u v.x rtzj experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between tet ;rnbwvu70l zs 3jt76 c.x(l p5izi6hem?

  Three identical point charges of 2.0 mC are placed on the x-axis.xk *slgl21 8ij The first charge is at the origin, the second to the right at x = 50 cm, and the thik l2s1xj l8gi*rd 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 2wkdz6sj 6:yhis placed at the origin, -2.0 m C to the right at x = 50 c:s6yd2h zkj6 wm, 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 at the focjw-k3)m 1y-z/,fw1qpvl i npllowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; ml,kyn3ip-wz 1/q wp1v- j )cfQ3 = -5.00 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 a square, q+sm m.p;ua0 sd4 hvr8and a second point charge of -Q is placed at the upper-left corns;sm 0ph8v qmda .4ru+er. 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, eb5 ( mcwkaz(*kq6*ny 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC cazwkb ((*nqykm56c* e harge?

  Q1 = 6.0 nC is at (0.30 m, g5,4e ailm4n d f/e;epux4jy20); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of t;yid2ag4fp5 eu, exe 44lj /nmhe net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at ta y;d7+x,d6 lcnevfd*he vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on yvcd ; 7l*de a6+ndfx,any one of the charges?

  Consider point charges of +Q 0ws43r rj8xwqwj 7e/eand +4Q, which are separated by 3.0 m. At what point, onjr w7exr 80ewq3sj/ 4w a line between the two charges, 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 origin and a +9.0-C charge is at x = 4.0 m. Where oton.aems f/;t r wi;7k- 0urh:n the xkmn;rtw :.et s/au r;7fi-0oh -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 =f4w x 1uq+,cxz 2a. Where can a third positive charge +q be placed so that the force on it x+f4wc1,zuq x is zero?

  A copper penny has a mass of 3.0 g,v7yqgke kva4+ d3ms6ydeb -zki6p2i j.1zw:. 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 thektm 8h3,pb7i2 h20 ym vakln1t force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the t3k 7yab0vi, 2k2m8n1hhltm pproton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads ww72 qr( ax:4lr2 lu,bb)h farvhich are 30 cm long. Both are given identical charges, and the er7 hqf2 u2xa(,w)varb :4rblllectrostatic 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 chai69 mpvbiumg+7or9t 1rge of +40e. What is the magnitude of the electric field at a distance of m 1tgmu9+ipbrv 67o9i 1.0 m from the nucleus?

  What are the magnitude and direction oy)x8.o 9zainrtoszq-p4p /6p f the electric field at a distance of 1.50 m si)4y.n-/z8x pp6rz qp 9t ooafrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small t) i ll )9rz+fguvaq+e:est charge. What is the magnitude of the electric fie9+ze l+)gquialrf v:) ld at the location of the test charge?

  A 5.0-C charge is 10 m fromh i ryo 7dicfx4;dzireq/.+z;b,/jx+ a small test charge. What is the direction of the electric fielqod bi z;7zy/+.ie4x+irj r ,chdfx; /d?

  A 5.0-C charge is 10 m from a small test charg2t*,jn edfn 3ve. What is the magnitude of the force experienced by a 1.0 nC charge placed at the lv*jfd3te nn,2ocation of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a di*(4 xt*dxao ognueu357ijk e )stance of 4.0 m. What is the electric field at axiu57kxeag(ue4d j o3* to)*n point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark d;sp *,dy2bn8x0ur.qx pm*w4u6 dn q aof a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cmxd0q 6.y rb ;*spn8nd*uqm2d4xp uwa, mark?

  A 5.0-mC charge is placed at the 0 cme xn m7ff5u -6ilt1v,m mark of a meter 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 the7 ,m f-ne 5fx1ivmu6tl electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are pey h7tky 0ksx:.:u5 iflaced at x = 0 and x = 0.20 m. What is the magnitude of the electric field at tuti xk.hkfs 5 0:y:ye7he point midway between them?

  Three 3.0 mC charges are at the three corners of a squaizm8- lp*+vng re of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the ele*gvpnm8z-+ l ictric field at the center of the square.

  Consider a square which is 1.0 m on a side.3h 1 6akb.ztux5bo gn) Charges are placed at the corners of the square as fol)51kx z .u36ao bgtbhnlows: +4.0 mC at (0, 0); +4.0 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 on a charge of 5.0 mC when it +r jse3we zh4 n)6gl97efjt,tis placed in a uniform electric field. What is the magnitude of this electric f+ j) e3z6jsn7we rl tge94,htfield?

  A particle with a charge of 4.0 mx6 wb qxc;y. oi+ubd81C 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 plaa+noq 0mjbntpm:1d:;9w:x- cqlhzq shh( .h 7ced in an electric field of 6000 N/C pointing downward. What charge must be placed on the balhq ph cm9l1xqson;d7w j: nmh. b ta::q+-h(0zl for it to be suspended?

  A foam ball of mass 0.150 g carries a j+ dm 4dn15j3ht-kz fhcharge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What anf kmdtd h z3j4-hj+15re the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magn 58ovky jevztm6-z7u 7flf++8 jelg1situde of the electric field 5.0 cm from the jf7 glfky-v 1j v68+ou8zsl 7mze e5+tsphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Wed1hn)6v**o v4 jurezhat is the electric field 6.0 c4*zhvved n 16uero *j)m from the center of the sphere?