State the law of conservation of sh +7zx-dq o.v qs1ya/electric charge.

  Is it possible for two negative charges to a m(+ px*ytlmn)fnsz9-jm 5h es2u:kh9 ttract each other?

  Is it possible for a positive and a negative chmco5k z n4n:7woczdz:jr*0w 2arge to attract each other?

  A glass rod is rubbed with a piece of silk. During the proccws p5:4 zs6dress the glass rod acquires a positive charge and thesr w5ds:6 pz4c silk

  A proton carries a

  The model of the atom sh h9s 0 b(qwdvhxc7p-/zows a

  A neutral atom always k)gupkpx4 np43rucs,u at 8l6(2/ mcx/b 2yklhas

  An atom has more electrons than protons.z hn), ./: pmlidw/muf The atom is

  Materials in which the elec8;gp0 :n d/+lxebixu kj)x 29c*w zmlttrons are bound very tightly to the nuclei are referred to0 xnkm;)bx g+l*8lx9izdp uc/ 2je:wt as

  Materials in which the electrons are boundljo 1l:zgd:rh,k f o79 very loosely to the nuclei and can move about freely within the m:ol hozf,j91:l7rd kgaterial are referred to as

  A negatively charged rod is brought near one e -sn-7 -dxa 7llqx1cstnd of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be nld7s1cx-7 s t-xl -aqcharged

  Sphere A carries a net positive charge, and sphere B is neutrd::q4hbsgsemcx489i tct 6 )kal. They are placed near each other on an insulated table4 eq9 4m:t6kscth c8x ib:)sgd. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged roxj w2+b72vxgrxwnb5c,aexf ) * +bg (vd charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively c l 07 k4:pvwulz51yxenj4qi,dharged glass rod. The ele5y d n4wlv7q:041ui,kpjlz exctroscope

  An originally neutral electroscope is grounded briefly while a posgj u o/,92i8d 0 scsmqoja++glitively charged glass rod is held near it. After the glass rod is reomda+9lg 8sjj2+i0qg /su co ,moved, the electroscope

  A positive object touches a neutral electroscope, and thegsb4.oc -smo8ln*4frh+k s7b leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to thssh8r 74bs-* lo.kgn+fb4 mco e leaves?

  A large negatively charged object is placed on an insula5a(h6s .xh;czl u;qa kted table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along t q5 lkz.xh6u(ha;sc;ahe 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 Coulomb constant nflod2tm 14u8 $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Tmwi n43 bpb)(uy8mt,me0wq/4hu) hgt he first charge is larger in magnitude t, wen 4ph/hy t0m (gbqu)3t8iw mmbu)4han the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near jnjg w if:(0x7each other on an insulated table. Whichg:7nj(i xjfw0 statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If thaxb4ht9.n1usg1 6 mxd3 iink1e charges on both objects are doubled with 1dkxn4g3nix61. m9hb 1u siat no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces 5tid 0 eze+5eknh z0y0of F on each other. If the 0 yzi 5t0den+h5ek0z echarges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects at-h0kq rlm*d/wd v5 kys,7hoq4tract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tr,ld 4h0r/*okqy-v kmd5s q 7whipled, 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 f t u3onbgv);r)kfd01 a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is plg nvutofb rkd0)31);faced next to the first electron?

  An electron and a proton are separated by a diirfj3 d r*w-t38 ea(pbstance of 1.0 m. What happens to j 3p 3dt(bi8r-eafr*wthe magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a pr 3 +g :h5r2+uwc+kjo0 x rby.lj9vjyrpoton are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the pux +h+j 50rrvrj9yobjk yc .2+lp:3gwroton?

  A point charge of +Q is placed at the cbm/rc5inv,qkb ) 8;d7qnm x.wenter of a square. When a second point charge of -Q is plvc .d5wxbr 7)nm ;,8mk/bniqqaced 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 positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of u3hq- jb h9xf+an equilateral triangle. When a second charge of +Q is placed at one of the triangle's ve-uh3 j xhbf9q+rtices, 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 following is not a vecr)f:d wjrj2 d(tor?

  At twice the distance from a point charge, the strength of th1(uf(,.wfwiaxa; ond :p; d jbe electric field

  Is it possible to have a zero electric field value betweenoi7-fru /fy)z a negative and positive char/i )u 7f-yfrzoge along the line joining the two charges?

  Is it possible to have a zero electric field value betxp4eg. t/z+w, -.t edmq(mix wween two positive charges along the lineqe z4d+tx,tp.w-gm ix /w(.me joining the two charges?

  Electric field lines6xr. )bdbr , z7kqr/htxbqn- / near psitive point charges

  The electric field sho 2u3 1xzdwdmbng+l9gz6p4va : wn

  Can electric field lines intersect in fr0rcqv89os elh70/k1wcp+gj zee space?

  A solid block of metal in electrostatic equilibrium is placed in a m. *x) fji;l0 ynqpsy:uniform electric field. Give a statement concerning the electric field in the p my):sqly ni*0j;.x fblock's interior.

  If a solid metal sphere and a hollow metal s7jp .-m e,kp vnnt+j9vphere of equal diameters are each given the same charge, the electric field (E) midway between the-jv,pn97 mkvepn.t j+ center and the surface is

  A cubic block of aluminum rests on a wooden table in a regbvwq9xx 8l(ia2r 16qv ion where a uniform electric field is directed straight upward. What can be said concerning tri 2(x 9aq86w1lx vbqvhe charge on the block's top surface?

  If a conductor is in electrostati.oe9; jaoek z ndt5:w ub41oy0c equilibrium near an electric charge

  A positive point charge is enclosed in aq7fj9vmj:e9 ld lu,q 5 hollow metallic sphere that is grounded. As cu,f9m :lq j79q5 jlvedompared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of cnp9 ;q40sdtmgi)t.nak)z sy 8onductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron i3wp 8 2ttegn 7pp.;p +,gchidrs $e = -1.6 \times 10^{-19} \; C$. 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 prot51npfgiw vl exn (*,5jons than electrons does this piece of plastipv51j5nf wx,(i* egnl c have?

  What is the charge on 1 kg of proton . )0luwb28,z kyce 5pp.nvx2rys-vfls?

  An atomic nucleus has a chargvv v-c1jspkfgu,:7 a) e of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5js+8 qv k3 1 566jk/yknxntlwx cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric for83ns1ynwx v5/j x6jkqkl6 kt+ce between them?

  A 1.0-C charge is 15 m from a second charge, k2g,/mse vnxv-1zi x0and the force between them is 1.0 N. What is the magm1/x xk2 zv evn0,s-ignitude of the second charge?

  Two 1.0-C charges have a ford5qm9b .x qn0uce between them of 1.0 N. How far apart are they?

  The force between a lesoeh -hd2,qw 22oa) $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experien8ayy9o1 fv6jic+r+w t ce a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electr8 y96iyvo1fw+ c+ra jtic force between them?

  Three identical point charges of 2.0 mC are plac .fm2o.wr8hsa ed 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 are the8m .sw2ah .ofr magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed ouyc0su gih-i:e0i b08 xv2ip,n 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 1x,0phv:2c 8yiuii 0-usig b 0e00 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 positions: Q1 = 2.00 q4ue3 b8pc j4 bnl,ud;mC at x = 1.00 m; Q2 = 3.00 mC at x =bq;p 8 4unude3cjb4,l 0; Q3 = -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 sy w,u3e/ bf ;p1t w+bk6po xpzq+iw(uxz3*t+ center of a square, and a second point charge of -Q is placed at the upper-left corner. Ik(wzf +6 ebwpt3b z/oqpu,sxi;x* w +t3yup1+t 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, 0); mk( 8v rn l*o.(fsug8tQ2 = -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 thf gnk ur*8.tvo8ml( (se 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.6bf-6lu(hf *ci gfj5x10 m); Q3 = 5.0 nC is at (0, 0). What is the direction ox* h6f6fcfug5-l bi j(f the net force on the 5.0 nC charge?

  Three identical charges of 3t.639 +bdqaj z/fjdhc.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude jh3cdj 9 .btdafz6q /+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 whaup /p;csd h65b5 e(kpxt point, on a line between the two charges, would it be possible to place a charge of -Q such tp (u5/5d6bhse kpc px;hat 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 on8x ge2c fs,m3a the x-axis can a third c ma ,gc3x8e2sfharge be placed so the net force on it is zero?

  Charge +2q is placed at thezj0yg6 l2 lqgdk+mh34 origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero?djl6g24lh+g qk y m3z0

  A copper penny has a mass of 3.0 g. A t p/1ncc1hs0 i/a)xt rootal 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 hj7 xrxu.l*3 cattraction of a fixed proton some distance above it. How far c7uh *lxxj.r3 above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common )jpwv:+*qb ucpoint by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them w)jbp*+:cq uvapart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has aqo kzllp0+kh 1e3z3 p* charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nucl+0lozqe3hzl* k 1p3p keus?

  What are the magnitude and direction of the electmz2h8b 3w 5edh6 lui: 24bpurjxox5c*ric field at a distance of 1.50 rb 2eo5 uhmwui463z:lp xj2c*5 b8 dxhm from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a sdazten/7/( *+*nti.ul dmpo76kqksemall test charge. What is the magnitude of the electric field at the +7p 67nzl/qm*.ketteku d /isdoa*n(location of the test charge?

  A 5.0-C charge is 10 m from ig)70 i iwy5;9jo1-cfngekys a small test charge. What is the direction of the electric field?gkgj1yfn50y 9-i c;ieo s )w7i

  A 5.0-C charge is 10 m from a small test charge. What is 1. g/y6 poigu th5q+s e91lrd v/dhr)pthe magnitude of the force experienced by a 1.0 nC charge placed at the location of the test h1pi1 /+)ov 9/r5guy.6t g eqlhrpds dcharge?

  Two point charges each have a value of; hfq v-lbttgl+9o, +q 3.0 C and are separated by a distance of 4.0 m. What is the electric field at b;gt +fh+o l- q,qtvl9a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter * udf8x 9oo.1fz.xgk; sgo5aestick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 kx5uxo .f.8 gsz fo; 9ge1aod*cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stir275m dg3epmbor p6 e socq:88ck and a -4.0 mC charge is placed at the 50 cm mark. At w6ds qp3 b7: 8gmcp or28e5ermohat point on a line joining the two charges is the electric field zero?

  Two point charges of +3.bid+ fh977y ve+ p7y9beh3 r;lxin*py0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electv9epih 7*;yhly+yp9xfi7 b +r 3b e7dnric field at the point midway between them?

  Three 3.0 mC charges are ahd6h; +enw:6u ym)d ezt the three 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 chey)6+;mud e:6n dwzhenter of the square.

  Consider a square which is 1.0 m on a side. Charges are placbjr0t(ii8 (r8cy eh o+ed 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). What is the magnith8r(ce(+ 8yir bi j0otude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mx;h7uza 2i 2skC when it is placed in a uniform electric field. What is the magnitude of this 2shx2ai;kz 7uelectric field?

  A particle with a charge of 4.0 mC has a t687rj habt /- xwxm2setqf7) 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 mast)sz9 xxt3r7ws 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be z3s9x )7rtwtxplaced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a chargm;xn : (uqvxuyaaa9+,r,- omde of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the +vod 9a ax;:,mxq-a,ry num(uforce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge zr,s.pz4vadzws 58z8of +2.0 mC. What is the magnitude ozprsd 4a ,zz8 .5wzv8sf the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrv)7n yf v3:lfjies a charge of 3.0 mC. What is the electri v3vjfyn7f:) lc field 6.0 cm from the center of the sphere?