State the law of consjmv rqw9k t.dj4n 0p;4ervation of electric charge.

  Is it possible for two negative charges to attract each h6z4oj)mf1 ,jtvv30+erh f y,lxo, eaother?

  Is it possible for a positive and a negative charge toqug33w/ mybq u +/w1ki h7f)f*9m choc attract each other?

  A glass rod is rubbed with a piecelcyb.xtr:u(:z. s) lm of silk. During the process the glass rod acquires a positive cha t: lb:c.yxlz)us( m.rrge and the silk

  A proton carries a

  The model of the atom s wxtra9fruv. 9jb5hkq w96t53hows a

  A neutral atom always w0bwrj98o zg .yug( /ghas

  An atom has more electrons than protst wsy2. sl65mons. The atom is

  Materials in which the electrons are bound very tightly to t8 vcwgvsiqq8-/ 8ob fmp-m1k5 8/hpvb1 ic2kthe nuclei are referred to a i8/8wbo h1p1mvq2g85vcqk-8 -vipsf b/ kcmts

  Materials in which the elmxuu2jjyk 5:g;*-u gds (w9fbectrons are bound very loosely to the nuclei and can move about freely within the g9f(-sw ;mjux25 : jbuyugd*kmaterial are referred to as

  A negatively charged rodg5 zz) x8o6nc:ctm tb; is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod o)xb;zn86 ctmc5tg :z will be charged

  Sphere A carries a net p1 wwasq 4qme+jkg:1 xh)he6 o(ositive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B ih:qosgk(x6) +j 1qa eh1wme w4s briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elect+ jfit.ymdp9 e:;v f1wroscope positively?

  An originally neutral electroscope is briefly touched with a positively c*g o3pw;j h.feharged glw3 gj;ep*hfo .ass rod. The electroscope

  An originally neutral electroscc,1* :rp,eo8h g hk5 sdt;yjliope is grounded briefly while a positively charged glass rod is held edy tkj;o 8*l g:5pr,,1hh icsnear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and/5a6af7a4n;p3 f twpu(ej tc y the leaves separate. Then a negative ob4tf 3 ae65j7(nwac/u ;fapyptject is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A n/ zutbsaa4v 3iwlbv1/-(al q(eutral 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 rolls forward, but does not touch the negative object. At no tim4/a1(blva z /u(vt-bliq a sw3e does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulo-tclc0 9ezss* y w9do(mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. *f6zmfj xzp, hhb y5-:The first charge is larger in magnitude than the second charge.f:,m* h - ypzzjxh6bf5

  Sphere A carries a net .n y-5echtba*/ sg+cy e4hc)hcharge and sphere B is neutral. They are placed near each other on an insulated table. Which statement b e hh5yccb*sgt -c4y .+)/naheest describes the electrostatic force between them?

  Two charged objects attract each o+r e,ls0aridg v) 7n 0dnw68j jovn-7cther with a certain force. If the charges on both objects are doubled with no change in sepawjod+ 7cd80rvnvis-7a) , 6g nlr0nejration, the force between them

  Two charges are separated by a distance d and exert mutual attr,,1s (/oebyiel)kesk* f fx, hactive forces of F on each other. If the charge *selibye ,o )h,x1k/,(fs efks are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other winwoi p7gs* -tyt4mu86th 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 reduced to one-fourth its original value? The force ism4t8*iypu7to w-6sng now equal to

  An electron and a proton are separated 6w0/btrqa mh)jw1wd3s vbx3 ) by a distance of 1.0 m. What happens to the magnitude q)b)mw whxa 3jwb 16t 0sdr/v3of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to4l.fz ag n1d,b)cm/nc zpgw;1 the magnitude of the force on the first electron if a z n4ga dz)gl;p .m1b1n,/cfcwsecond electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens hbrd 47 immz7k8 ak1/mto the size of the force on the proton if the electro/41 7mhkb am izr8kdm7n is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. nu +th0ipl) )(eyyt/qk. m ve4 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 squa tp( hmn4/0 ivule )y+k.tyq)ere. 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 j/nswn9 oy;fcp)- v+ (ktuou3triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N 9vpu -nc/nj+kw3)yuf t os(;oacts 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;+d0t3r 7wxv 6rsw ob jxpg+(q a vector?

  At twice the distance from a point fpw *kgbx:/squ 1w(t)-*yjwb charge, the strength of the electric field

  Is it possible to have a zero electric field value between afy.;edlncf - 9 negative and positive charge along the line joining the tclf-n 9f y.e;dwo charges?

  Is it possible to have a zero electric field value between two positive chargh0 vg8p h-jz)3vja7vk w,cp0yes along th wkcghp7vj),y 8-3 jvzhvap00 e line joining the two charges?

  Electric field lines near psitivepsz c)7v,/0wn mhzt u/ point charges

  The electric field sm mf33d4xp5 unhown

  Can electric field l2zliezv6cr4,vk1h1 f ines intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elect/ *)be9qs 5o3v stowndric field. Give a statement concerning the electric field in the bw5/et s*b3 )9sonv qodlock's interior.

  If a solid metal sphere and a hollow metal sphere of equalz-:q0 / do8khbxv5lyg diameters are each given the same charge, the elecx:ygoq-8 /v5zdh0 kbltric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tabl(s oegkr7/q:h m ,9true in a region where a uniform electric field is directed straight upward. What can be said contrh k7m/sru (g9q,:oe cerning the charge on the block's top surface?

  If a conductor is in electrostaticunj z*g7) u;ps equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that isil rjxl c;,n:bo)9jn 0 grounded. As compared to the case without the hollow sphere, the electrn)x;:jj , co9l ilb0nric field at a point directly above the hollow sphere has

State three properties of conductors in stan ) *sh;:ij +bp0irvclsvo15d tic equilibrium.

State Gauss's law.

  The charge carried by one ev9o:2jt59mya n t sotx e)w,2rlectron 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 +2.00 mC. How many t2u7 gry)8.:0h-n dqvigzwuh more protons than electrons does this piet8n:yzh)0q7i u-duh2 vrggw .ce of plastic have?

  What is the charge on 1 kg of ;*re(jrb ad/uprotons?

  An atomic nucleus has a charge x5 1/(nn dsatbof $+40e$. 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 charge valu -iuo4ednpq+g 1yek63pp l +7ses of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forcidkyp7peg 6ln+u +3q- o pes41e between them?

  A 1.0-C charge is 15 m from a second charge, and the force bevc(-d1 vdl4iohz.q*zt;o1zd tween them is 1.0 N. What is the magnitdt doq -dl41 z 1zvh*o;(c.izvude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they?ud0 6i1ucb ej8

  The force between a 4 mjd9ial s+9v$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apar0h*3rui/k .zso szrvh pw7 5a*t, experience a 1.0-N force. If they are m 0/.hzskih 5swpa zr*v7o*3ruoved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pla/ qjnzf nj5 0 w)rr-e*rnp7e-jced on the x-axis. The first charge is at the origin, the second to tnnn5qe)0r e/fj -7zj*rrw-jp he 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 charg9 dw3, qyih ;3e(erw:sai*; njg .bfnje 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 electroste wa( 3y .9sgnjdeij;hb*;,qnw r:f3iatic force which acts on the charge at the origin?

  Three point charges are located at the followin6a+x*zstr +hg g positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the mas *txhr++6zgagnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and )s qzk+ 1c*++myloduka second point charge of -Q is placed at the upper-left cor+k omyz+)*ukcl +qd1 sner. 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, 0); Q2 = -1.0 nC is at (0, 0.10 m)6zauz g.o rv5o c8rj2.; Q3 = 5.0 nC is at (0, 0). 6rc.z2.8uz oj5v o rga What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0 ;ba34mao;tadey)5uc ); Q2 = -1.0 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 5.3a;dc5 mubo4 e a)ay;t0 nC charge?

  Three identical charges of 3.0 mf(.z c c,8alsmC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the.8cmzlf (cs a, magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charg3fi(q mz :rz6wyoz4bzhfje5)q 1m/ (zes of +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the hq1/e45mff zom((izjqz )6yz :zbw3rtwo 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 chargep k:g(5x p*jsre20 wn8 ubxo9j is at x = 4.0 m. Where on the x-axis can a third charge beprx(e05ub:2w*p gk9nxos 8j j placed so the net force on it is zero?

  Charge +2q is placed at t;rcfoq2 ttwv r: lig84g m5.z.he origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that theitft4;r 8cz. grq.o:5w 2l gmv force on it is zero?

  A copper penny has a mass of q+-(w k2 u3uy/fh/jz 2ud ixz6c yclk;3.0 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 dv4u0(.vx olsthe attraction of a fixed proton some distance above it. 4l vsux( o.d0v How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncon xkgyr23bd22b*j0u0mplhv f ;ducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle bed00u2ghr; fm2 k vl b2jbx*3pytween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a chah5uz*m e5bvx. rge of +40e. What is the magnitude of the electric field at a dist*mx z.eu55bvhance of 1.0 m from the nucleus?

  What are the magnitud/3pwf1mflkx q6 :fy6b ) c6psul 0d)xte and direction of the electric field at a distance of 1.50 m f)xpwcx l6ptfqd63 6u/s ):ykf0bl m f1rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a ;d7 xkx a1d(kdsmall test charge. What is the magnitude of the electric field ax1a7xdd;dk (k t the location of the test charge?

  A 5.0-C charge is 10 m from a small test chamu3u7x b*ron v/xg0oe x g2d:.rge. What is the direction of the elect2 vmu0/xb3 .xd7urgon oxg:*eric field?

  A 5.0-C charge is 10 m from a small test charge./0pnsx zw :.rh What is the magnitude of the force experienced by a 1.0 nC charge placed at /.rzp:sxh0wn the location of the test charge?

  Two point charges each have a value of 3.0 C and are separ ,px(xb snja5/ated by a distance of 4.0 m. What is the electric field at a point midway between the twoj(pab,x/ 5x ns charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC t /up hdeq9 n788gqohfz*j,l 2charge is placed at the 50 cm mark. Who9g8zlq, 2 f u/*tqh7nhjdp e8at is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm markx8-7f7 cxa ,xy)nrn oi 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 the electric firfx 7xocany8) nxi- 7,eld zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x =+e7x(iha, xm .p us;couy-mcl,)zk+h 0.20 m. Whats+ ceu z. chxm+)-y, ;ipmoa(lu,h kx7 is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at th wqw/6nl( rll-e 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 center of the sw-rq/wl6ll( nquare.

  Consider a square which is 1.0 m on a sisy:/c8ywunpb t6 ti29 de. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC a62wbytu yi:c 9snt8 /pt (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 is placed in a uniform electr7d (6ghgmr f0.oesz,qic field. What is the magnitude of this elecg o,0z r fq.dsh(7meg6tric field?

  A particle with a charge of 4.0 mC has aexc -3 qbic4y4 w b685mcxk(af 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 placed in an electric tie hd+;r15tffield of 6000 N/C pointing downwae+tfi t5;1 rhdrd. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. t di(2ll u)uw(fdga( 8 d,gqv9u ;h.kfThe ball is placed inside a uniform electriugla uql 29h,8tf(k df d((udv);iwg.c field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius wp 9n5 h/p mirn5-nk2b10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfk mpn5b i2hw 9n/np-r5ace?

  A metal sphere of radius 2.0 cm carries a charge of 3.xrrtt 9nsj*bc7 0s .dz;us.;4w ey7 qxdx a6i/0 mC. What is the electric field 6.0 cm from the center of the sphx7xjc sw 7az/6s49y trbu*qdx;0nis;.d. rt eere?