State the law of conservation of electrgb +keh4 v;oefplc0ud- t -(9lic charge.

  Is it possible for two negative charges to attract jzr,,l xjg:xwj0f c6m+ t;0dveach other?

  Is it possible for a positive and a negative charge tow egk odcm;n-fa83lw 1;5 v7ue attract each other?

  A glass rod is rubbed with a w2am2jit tl*uw/ * z+kio))/bjcjj-hpiece of silk. During the process the glass rod acquires a positive charge and t2kz/jl* )h2umaw+ )-*jo twbj/ti ijche silk

  A proton carries a

  The model of the atom i rc3k +2sr-vushows a

  A neutral atom alwayljd4*vb.d f. 0af 7nm96dgfwhs has

  An atom has more electb+p f0gwu,xh r f5l8b2rons than protons. The atom is

  Materials in which the electrons are bound very *mj hh;9u4jiwtightly to the nuclei are referred *9mh i4;uwhj jto as

  Materials in which the electron482gnapmwo.sz+8v h es are bound very loosely to the nuclei and can move about freely within the material are ranzpwh4vme g . +8o8s2eferred to as

  A negatively charged rod is brought near one end uc2**vm j +hpoof an uncharged metal bar. The end of the metal bar farthest from the charged rod j+o2vh *cpmu* will be charged

  Sphere A carries a net positive charls9x/deo cz;ue/le;, ge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which stsl zlc,x e/uoe/;9 ;edatement is correct?

  How can a negatively charged rod charge an electroscope m ;hiolui,v2 . cj7ey.positively?

  An originally neutral *6 b,wwr( koa7db1knu electroscope is briefly touched with a positively charged glasswobkwud(6nrb ,*k7a 1 rod. The electroscope

  An originally neutral electroscope is grounded briewt oqvp6mauo/+m/i36 fly while a positively charged glass rod is held near it. After theowoatu63q m / 6mv/+pi glass rod is removed, the electroscope

  A positive object touches a neutral syu di -of/68ielectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to t y8-/uoidi6fs he leaves?

  A large negatively charged object ;i h; y uxn(n:,x jhg/anujn99oz3a;d96jgruis placed on an insulated 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 followehx,3udh; 9u;inr9n9jag 6xj j gzon/y( :u n;ad 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 th7maw-9j3w6;kdau(tx m*d jlq e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separewvk9d0ccy7ndhn t w/)t g7 8+ated by a distance d. The first charge is larger in magnitude 7ghn+n etv0/)t8dywdcc7w k 9 than the second charge.

  Sphere A carries a net charge ado-y5mhn /-+ sy gx0uand sphere B is neutral. They are placed near each other on an insulated table. Which statement beg+x y s0-o5mdaun y/-hst describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. 4v(jtin,lhb- If the charges on both objects are doubled with no change in separation, the force betweentivnbj4l-h, ( them

  Two charges are separated by a distance d and exert mutual attractive forces of 4l3wtzwl hfcg+g5p9 + F on each other. If the charges arwf35h+wl+zt g4c p 9gle separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forcezhr2r 4.p jc2s F. What happens to the force between them if one charge is doubled, th42s.rh2 jczpr e other charge is tripled, 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 separatedk7 ipe10qvld0 by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first 10 pqk0evlid7 electron?

  An electron and a proton are separated by a distance of 1.0 m. What hapuud*0w9 d22fazrrv*i pens to the magnitude of the force on the first electron if a seconaru2idf2wr**9vud 0 zd electron is placed next to the proton?

  An electron and a proton arcfjmw-rdt/bh /-m clhm5a8 ;.e separated by a distance of 1.0 m. What happens to the size of the force on the proton if the elect/l.t hmd 85-cbm;cr/-hf jwa mron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at 3by ,qsn y(-klthe 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 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 qlyskn(-3 by,center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Whe/uz4skzk*bxoj ao6 (278 glihn a second charge of +Q is placed at one of the triangle's (uako 7k62*zg/8 jsbo lh4xiz 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 following is nots6k.xjo2)adp 80 poyw, gde v2 a vector?

  At twice the distance from a point charge, the strengteakw x(8u0;efvci1mxv7 yf -4h of the electric field

  Is it possible to have a zero electric fizav ( 2;+hsuoleld value between a negative and positive charge along the line joining the+; auszv2(lho two charges?

  Is it possible to have a zero electric field value between two positiveav),(b p/ckdun6zh(: 6m jpyi charges along the line joining t6bjm)k: ,nciaz( d/p6puh(vy he two charges?

  Electric field lines near psitive point chargest- xasinidcr6p49 *x*

  The electric field show.bu *6uxr5holn-lg7y aq8-df n

  Can electric field lines intersect in tid vo,bt 7n36free space?

  A solid block of metal in electrostatic equilibrium is placed in )ywog96.g0jrlxw ;f st6ss y (a uniform electric field. Givrtyjx 60)w(.s9lw 6gfgysso; e a statement concerning the electric field in the block's interior.

  If a solid metal sphere a5kr(*8zh*w r ztemqm ulk11c+nd a hollow metal sphere of equal diameters are each given the same charge, the elect 1*k cr8e*m(krwzz qtu1+5hl mric field (E) midway between the center and the surface is

  A cubic block of aluminum reste-vi o .0juu/gs on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the e uujv0g.-o/icharge on the block's top surface?

  If a conductor is in electrostatic equilibrbz)ob*q59e0wpvb. 8+ qdmpfc ium near an electric charge

  A positive point charge is enclosed in a hollow metalliu,ue7n8 he9czc sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point di 97zu,cnhe8e urectly above the hollow sphere has

State three properties of cvh8r ; 1ngjb8jonductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is(no2k jmh7.4brz w9aj $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net cha rdoouwl45:)p rge of +2.00 mC. How many more protons than electrons does 5)or d4w:lou pthis piece of plastic have?

  What is the charge on 1 +hv+2i(7u v -hsbwgmskg of protons?

  An atomic nucleus has a ch,06 t;a1 *hqaxns rnnc5hhe8narge 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 chp3*:z u2cw cbdarge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them*w :p2d3bczu c?

  A 1.0-C charge is 15 m from a second p9y.qd 33azxix9w4h qcharge, and the force between them is 1.0 N. What is td4h y 3 qpxi99za.wx3qhe magnitude of the second charge?

  Two 1.0-C charges have a force 06v zoasah .c2between them of 1.0 N. How far apart are they?

  The force between a i w-fjb;kn cg/ ydo28p7a4rk0 $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 6cu(18ldktlfr 35gxx cm apart, experience a 1.0-N force. If they are moved to a new sep3x5(6flcurgk1 t l dx8aration of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC cq/:3)fmy zzc03vsxk -k0vqk are placed on the x-axis. The first charge is at the origin, thf0vs3k)q 3 :k-yq0ckxzvm z/ce second 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 are placed on the x-axis. A chargl2,4 y3mfep jte 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 magnitu2ty p,jef43l mde and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are caf,-*++it hrf7*aqs huy0(ijzn l9nlocated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC atru-9h*ty(h qn+jzia7+ f*f s,n0i acl x = 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 center of a square, and a0viu/)i 6o t gf8dzyk*oody43 om- av5 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 oni)oo 8uyovktddf-m*o 3i4 06yv/z 5ag the center charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30j ev,q 8akgy)ak;km 22 m, 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 foa,ka )jekm vgyq;228k rce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1mtu,8lu k , 3rh0uzfa-.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net forc,humt8f3-lr zu u,0ak e on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of 5x 5jyb0c( xuiq 1ud+can equilateral triangle which measures 30 cm on a side. Whaxc55+ubuc( dqjiy0 1xt is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, whi.zb igg/5 gerx* xld*7ch are separated by 3.0 m. At what point, on a line betweeb.57er/zx *xgigdg*l n 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 anka n;1s r9o0xid a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed siax 9;s1kro n0o the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is plooyn3i7vfl/.u8 w 0xwaced at x = 2a. Where can a third positive charge +q be placed so that the forc /nwoo803lf x 7i.vywue on it is zero?

  A copper penny has a mass of 3z:f1d7ouz, ur .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 the attro lz;fi/s 1669avtxi oaction of a fixed pro9ax;ot l/ vof 6zi61siton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common ywf h7lx(23gqc)2 iz l(dfblnrd*9y9; zqb :fpoint by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces theddf9cl*il : (q hlz2qyb)n(xff9 g3w7y;r2 bzm 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 6j;0iuucl*it a;z: o (fb .izimagnitude of the electric field at a distanc:zizlui* u06af ;oj(;bt.i ice of 1.0 m from the nucleus?

  What are the magnitugox ,kd5guq1*m h.3 yide and direction of the electric field at a distance of 1.50 m from a 50.0-n3 gmx*oiuk.g ,h15q dyC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the mag,qpk 6qhqdkslz0;(89ev xdq o:dj*;qnitude of the electric06dkk8, : pqd9*;l;(z ovqqqdes hxqj field at the location of the test charge?

  A 5.0-C charge is 10 m from a small testh6agq+)1:o vqe wh9a;hakb w5 charge. What is the direction of the electric fieeh 1k6 aaq+wao)qhh ;95b w:gvld?

  A 5.0-C charge is 10 m from a small test charge.9kk gyu(m k hf(f32)oe What is the magnitude of the force experienced by a 1.0 )fghkeuyk k(om3 29(f nC charge placed at the location of the test charge?

  Two point charges each have a value of 3swfvgv; v3+vgr6 yyl8 s z :2aq/b7o-d.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between gsg:adl8r6vv+-72/wfzv ; boqyvy3 s the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter skdxi,: zr7 ok25a uy4ztick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at td5zui 7xyk 2 rkz4:oa,he 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chw4/,kpl.ql r uarge is placed at the 50 cm mark. At what point on a line joining the two charges is,p/wul.rkq l4 the electric field zero?

  Two point charges of +3.0 mC and -7.0 mCg pdhro426fu( are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poir(pfod 64u2hg nt midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.5 k6 1.nk6crych0 m. The last6.kk1rhc6y nc corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1./+5ni;q)r zr-q u 2ufhea s (ajn+mlu.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC an-fem/ q;5ui2 sur)ahrjun+(+qza l. t (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 char1q8)e ishhg1 p8p0egr ge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this ehhsre8gpq e i118 )0gplectric field?

  A particle with a charge of 4.0 mC has awp:zc4a)sl hs7(yjus)* 0xsv 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 l fx5q+3gsrn dmte8a+ n6 t3c30.120 g is placed in an electric field of 6000 N/C pointing downward.t3 enqrm++t s8x l5ad6cn 3g3f What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.117d6 pmiq.ej9t,o* ddlu la9g50 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspende edmj* 96ol1ldtp iaqg9u7d.,d against the force of gravity. 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 the)3e/lm) +nlgkvwrg2+l)dbiwo r j m+ ; magnitude of the electric field 5.0 cm from the sl3d2rv be)igwmnl+)g/wm ;) ok++rlj phere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3y9mp)0(pwnbcr9w9 atn c 9gcjp(.r* d.0 mC. What is the electri9 pwtp.)w gr(bjr9d cc90y p*ac(mn9nc field 6.0 cm from the center of the sphere?