State the law of conservation of electric chargea,* we ft 0uv)avz8u8j.

  Is it possible for two negative charges to attract each;+ is )/zch ejoer9d2j other?

  Is it possible for a positive and a negativu99/g;si3:i bi lpi ove charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process tla t i:o8v4yk .:z0hhthe glass rod acquires aioat:048.:y hhk l tvz positive charge and the silk

  A proton carries a

  The model of the atom shy9 c1n:ip.,yo d8h p-nql2 kqsows a

  A neutral atom always ha1ddb9e 3j 9xavs

  An atom has more electrons than proton3zd1/ct-q( ma k-h)/dhkhkjq s. The atom is

  Materials in which the2- x e50ddvqrr electrons are bound very tightly to the nuclei are referred t-v drrq5d 20xeo as

  Materials in which the electrons are bound very loosely to thet2inwv du++o/3x z,d5ut l* dct)oh0o nuclei and can move about freely within the material are refeno0iu +dd, )5wt 3cxhlt+*td/vzouo2rred to as

  A negatively charged rod is brought near one end of an uncharged mewdqa3t j 3+9ex+.dhkhtal bar. The end of the metal bar farthest from the charged rod wilqak3e+39jh.x dd wt+h l be charged

  Sphere A carries a net positive charge, and sphere B is neutrp ugwp3(( yd(( i 4csrc6w/groal. They are placed near each r(r gcpu(ws p(g3oi6 ycdw/ (4other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elo) pu4v6ndne .5,qlubectroscope positively?

  An originally neutral electroscope is m2d + r(vxdop4sxuovv/- f3w: h:rt,bbriefly touched with a positively charged glass rod. The h /: r 2o twvx+vb:dos,f4xrm3-dvpu(electroscope

  An originally neutral electroscope is grounz . 8 xx,sgqrj3d86nppded briefly while a positively charged glass rod is held near 6q ,sdn8 ppxr83zg .xjit. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves yw+ dlb+ol;6r eu8)d hseparate. Then a nel)o druy;+d6w bh8l +egative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is plabhf8 /-xtu,nr ced 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 followed by the first ball, strikes the first ball, and stops. The first ball rx -n ftuhr8b/,olls 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 th( ocylzuq;/l 4j dd-g;e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is largzdn0qh kyu )s*ekmf 996jq0:ler in magnitude than the secolkh90nq zfsqm0y)d6*uj:9 k end charge.

  Sphere A carries a net charge and sphere B is neutral. They aas-gmh5ahx : ) yt/dn6re placed near each other on an insulated table. Which statement/dg5nh t h-sma 6ay:x) best describes the electrostatic force between them?

  Two charged objects attract each other with (ehaf5 9t y*nga certain force. If the charges on both objects are doubled with no change in s9enafh(5 tg* yeparation, the force between them

  Two charges are separated bm1 (e43fjdco cnc9l3vy a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual391 c3lo vcfmcdje4 (n forces?

  Two charged objects attrasvt 1gde.dr9s r/ lk-;ct each other with 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 red 9;kvgsd/s-dr1tl er.uced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance4gv;9b sc4kls am1w(*zpe ( pf of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is plac4v;bg1zs pe*lp4maf9k(( csw ed next to the first electron?

  An electron and a proton are separated by a distance of 1.0bn 4rqv/1m(wnpfia/xi1,yw 7 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the protopf/14b (/i ,imxnqwvrnwy71an?

  An electron and a proton are separated by a distance -xhq2n -xiiu- 0u/udg of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m2-iux uhd -x0nq-ug/ i closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poixvh03y(nf*.g n f d:-awzede9 nt 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 othgx 3.:nee* 9-zfhaw v d(nf0dyer 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 a073l (gbod wlpg.z*o;ol t 4mv- ljv5on equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N ag*lzl05- oo7w ;p l dgblmvoj3(ot.4 vcts 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 no8 n;:edpzd;qcwtb;l. *l/ buk. 4fnbwt a vector?

  At twice the distance from 0in x9kx4ugqijsto;5:r 3. wna point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and positiwf)c8st + 2ym t5bksn9ve charge along the line jw8s+ ftst)9 ymc5bnk2oining the two charges?

  Is it possible to have a zero electric4ne07wto lr . y 08ab2t9qshio field value between two positive charges alonr ia0qty 8obsh2 lwn9ot47.e0g the line joining the two charges?

  Electric field lines ne s+/mar2ak he jdgr*,x/a tg))ar psitive point charges

  The electric field sho -pgaf/u+vxu/ 7bjv ;mwn

  Can electric field linescc.y b*a pzc;, intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a un8+z2 qcqrq4x qiform electric field. Give a statement concerning the electric field in the block's iq4 qqqr8 c+z2xnterior.

  If a solid metal sphere and a hollow metal sphere ) /amj(hng5du of equal diameters are each given the same charge, the electric field (E) midwaydnj5mu (a)/ gh between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unioxq - e.movh6:+eb)uq form electric field is directed straight upward. What can h +6oq-meebo:q xuv) .be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium w ba7.m6 8voazhzf3+ v0v5suu near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grooeloz,0 ;5dij unded. As compared to the case without the hoedz;l, ooj5i0llow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilihy/30jpl+hg;*kbvwa 8g ) bnhbrium.

State Gauss's law.

  The charge carried by one electroo-pn: i2g;aobsmzgn 0frh 9* /n 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 oidtw 4c07 ur-dvj8(kcf +2.00 mC. How many more protons than electrons doe dr 84u7tdvcc jk(iw-0s this piece of plastic have?

  What is the charge on 1 kg of7x+ u j8kg*eou9qi6c7eia; j4) ovyxa protons?

  An atomic nucleus has a chargeyt,- )slr7 q2s1e4deq qqb* tp 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 cl,/.16mj6qyh dxq b vmharge values of 2.0 and -4.0 mC, respectively. What is ,6vm1 m6 dqlb/q.jhyx the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a s)oh*)5s4rcc) qza vweecond charge, and the force between them is 1.0 N. What is the magnitude of the seconds*cw )5) hreo )a4vqcz charge?

  Two 1.0-C charges have a force between them of 1.0 N. How fare/aj(g9bwy*c; zt.ex o02 wik apart are they?

  The force between a eidr17w5cr m6cv .l0j$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ex6)wez kz+ okj/qcwy2ze/, mokv79+baperience a 1.0-N force. If they are moved to a new sepa/+6) kebqw /z jzveo97ow ka,c+ my2zkration of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed yarj4h4 t5bo-vf m(p 6on 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 the m j-ftv 64b oa5(ry4hmpagnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are plwr73 l2g6a a/dxh w;9t4h mpfgm7h;wn aced on 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 100 cm mark. What are the magnitude and direction of the electrostag6a7hhn9 / mtx w4;lwf732p;gwamd rhtic force which acts on the charge at the origin?

  Three point charges are located at the+vs lm,dnl.b 8s/h b/e following positions: Q1 = 2.00 mC at x = 1.00 m;n 8 .s/,/es+bmdb lhvl 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-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point c8pdsb vf8b :op bhfd64)3m 9peharge 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 o 9d4bp8)b f :efbpsvhd3m68pthat 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.z8ikq dmn.-; z10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the.zdz -n8;mkqi 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -,ems yvvn:s(f;7f3j p1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC( s;nvejys m3 p,7fvf: charge?

  Three identical charges of 3.0 mC are plaf sxx*e8jd3 7aced at the vertices of an equilateral triangle which measures 30 cm on a sidfxa 3dsjx 8*e7e. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are se6l xwk .8eog/uemlux hh) 29g/parated by 3.0 m. At what point, on a line between the two charges, would it be possible to p6hwo/ xege/k )8l9mgux2u hl.lace a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the or5m5wna g2,uraw; *p dmigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge beww a*m2dr5 napg,;m 5u placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where cr 8+nmb+p)kk*qv dit4an a third positive charge +q be placed so tt8 kq +m d4nkir)pv*b+hat the force on it is zero?

  A copper penny has a mass of 3.0 g. A tj b d46025gxkbzl-jwbotal 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 attrazg(al2tr7 mz 0ction of a fixed proton some distance above it. How far above the electron is the2tzzrg7alm 0( proton?

  Two 0.20-g metal spheres are hung from a common point by npba(gybq7uc p/79ope3 b .q7 i2e2dzy onconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion fore79p3p2/o gb( 2y7q qzbu abdi7.cp eyces them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a chkhs;-.7wrs sq n-:ubpax7+nn*9pc xd arge of +40e. What is the magnitude of the electric fies u sn;ahxx7 *w-kn:cdb 9pnp+r-7.qs ld at a distance of 1.0 m from the nucleus?

  What are the magnitude 9ex6dd2gp )5peq *thhj uvi- /3 /ccpdand direction of the electric field at a distance of 1.50 m from a 50.0-nt/2e)5uj p6 xicc dh-9hd/pgp *dev3qC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magniou(j1ny ; a+t.ddz0y xib +mi)bb9,lc tude of the electric field at the location of the.bl ) ioiut+x9m ;(+y c1az0dbd, byjn test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of thep.4yqn6l 2c8vfug cy+u,xx hd **td g* el*cd u2xtq **d lvg84 ,uhp y.y+gfnx6cectric field?

  A 5.0-C charge is 10 m from a small tesr tl/ts3:l. dj0- j)ipven6/z:i eb pit charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test charge?e03b)zsi :tpl r:ip/ lvj/6 ji. ed-tn

  Two point charges each have a value of 3.0 C and are separated by a distance of tqwzoe915j66 iunj( pun2 9gl4.0 m. What is the electric field at a point m q5npj uu9j(l21zi 6o6gtwn9eidway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter s;t8ywgq c h4+gtick and a -4.0 mC charge is placed at the wg cq h8+y4;gt50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cjcmphr6pkky45zx8ddd.7, f l8) .gvfm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what poin. 8k6j rfvpd 4xl p)y5h,d .8kd7czmgft on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0*;1: l bnwd 1yzykfe34n1b dpl mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric fie*bn:y 1ldl 1 pbwfzk3y1 4n;edld at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Tzgm9fg4 j; dnh8 bxh.n2;wn4 jhe last corner is occupie2nnhxb4n.g 89z;gjwhf 4j m;dd by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cornersqsxz :k,z5k f7 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 magnitude of the electric field at the sqfx kszk7q5 :z,uare's center?

  A force of 10 N acts on a charge of 5.0 mC 22aio q nc29dl5,;nqli js)ie when it is placed in a uniform electric field. What is the magnitude of this electricjd a5c 9qii22nqol 2s iel,);n field?

  A particle with a charge of 4.0 mC has a mass of crahbk9oke5f*/b;d -e/qz: i $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placedf; o-066dsdgp2+ua6sdf8-dtq m p yxg in an electric field of 6000 N/C pointing downward. What charge must be placed o6oqd2sd 6tdx- py g gu+60;ff m-pas8dn the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a 9i8r ik(ru)d rcharge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of thdi8 9)ik urr(re electric field?

  A metal sphere of ra ukrod8x1)+*yjr t3t0u b :caqdius 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the t+13 x:ja*uro bk0yc)rudt8qsphere's surface?

  A metal sphere of radius 2.0 cm carries a/ a pkwcj0g/7y charge of 3.0 mC. What is the electric fiegpw0 7//jakc yld 6.0 cm from the center of the sphere?