State the law of conservation of electric xpq,em6cc; zw.:9rity3do xm)lji2 .z fz0 h( charge.

  Is it possible for two negative charges t( y axov:2zpza(w(j u0o attract each other?

  Is it possible for a positive and a negative charge to attvm6( xt aw2o9bwtv,biv9g8v7ract each other?

  A glass rod is rubbed with a piecxx 6v3cxm6q)c e of silk. During the process the glass rod acquires a posit vmcx63)xxcq 6ive charge and the silk

  A proton carries a

  The model of the atomaonib +b6m2;k shows a

  A neutral atom always ha nc0svq.2vm 8rs

  An atom has more electrons than p 2n2hr3 z bxmp6mwcv1-rotons. The atom is

  Materials in which the electrons are bound very tig +h odr+e+flcg;p;.uqdc m p)1htly to the nuclei are referred to af;)ph .o+mqd;d +lcug c1per+s

  Materials in which the electrons are bound very loosely to the nuclei and can v a58dphnfd m3g28 ,8w dif6njmove about freely within the material are referred to a,8dw52h vfma 8df gni3jnp6d8 s

  A negatively charged rod is brought near one etfzbv9 7vzbys 1us ce/yx3uh). 4b/)sfy po 5*nd of an uncharged metal bar. The end of the m yybt)/.fcs9bu4v o1bh xsvys p 7e)/fz* u35zetal bar farthest from the charged rod will be charged

  Sphere A carries a net positive p p5+gu+bq/ m some3y(;:lcd jcharge, and sphere B is neutral. They are placed near3pmy/:+ bdo qps(mg +j;eu5l c each other 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 elee plfx 12mctj;xk6- 3octroscope positively?

  An originally neutral electroscope is briefly touched with a positively cha(iiq:d4 etbz/ s2q: vqrged glass rod. T:itb:v/4 sqieq( d z2qhe electroscope

  An originally neutral electroscope is fa8+7hbha+5 /b wwmbngrounded briefly while a positively charged glass rod is held near it.b+hn wf h7m5bwba+/a8 After the glass rod is removed, the electroscope

  A positive object touches a neutral -/)cquc,xrk 9 surv0 belectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Wruc kxr b /cs-)vu9q0,hat happens to the leaves?

  A large negatively charged object is placed on an insulated table.adnax8z- z-j 5 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 rolls forward, bx dz85n-aja-z ut 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 therj50cx eg p zkym;9yxhi /5.n8 Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separe :z.y wj0oy)l:p(zs oated by a distance d. The first charge is larger in magnitude than the se.l: yspy z:e0)zoo(w jcond charge.

  Sphere A carries a net charge andfs3 n(z:y u9rn *cqferw)pgg5+9xnv ) sphere B is neutral. They are placed near each other on an insulated table. Which stargz(q)yec+*sn9g:)wn vu5 rxp3 ffn9 tement best describes the electrostatic force between them?

  Two charged objects attract7zg c/og8u spmu+) (ux each other with a certain force. If the charges on both objects are doubled with no change in separation, the force between(pguo/u8m 7uz+sgcx ) them

  Two charges are separated by a distance d and exert mutual attramq8wpc 2vo;*sctive forces of F on each other. If the charges are separated b p*82qw;svcomy a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other wipiycb9cp* v5m ,+ lo.pth 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 originp .*b l5vop,cip9 ym+cal value? The force is now equal to

  An electron and a proton are sepagn3 ,egqgs;oqsg* r) .rated 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 fgrss.) qg3, ;go*e qngirst electron?

  An electron and a protonj b ihmc jmus(i(,:*sr r+;r6f are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second ermh*6cs j(mbuf:+isr ,; (rijlectron is placed next to the proton?

  An electron and a proton are separated by a distan7b y;fl/9uz5asr y + ,yosnqx;ce of 1.0 m. What happens to the size of the force on thf 7qo5ax/yyl ;,yu9 rznss+; be 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. When )wsnr mgoypx2 b2d*s k5rp2: yc:63w qa 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 tq:b2c*2 r oydk py )x2p:wng3s6m5srwhe 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 an equilat:c 8e -a*re4ynfhhnzaae -v13eral 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 chare c*n h8y-e4zhva: re1a-n3 fage due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vecnl1y gt3 1fevc io8/b6tor?

  At twice the distance from a point charge, th t4z 5vcgab:h+e strength of the electric field

  Is it possible to have a6o1a3/ke2 tbm vg wf3/kz*mdr zero electric field value between a negative and positi3 k*f 1z b3krv/mmg6toae/2dwve charge along the line joining the two charges?

  Is it possible to havms h)jrs38+ 1ekzbrk f)/pw 3ve a zero electric field value between two positive charges along th rmkswp) ve/k331b +rh jf8zs)e line joining the two charges?

  Electric field lines near ps9 l7+ a)pdd ahm6d,azkitive point charges

  The electric field shown3agm7t 0etsi/l tlg p45i, at7: vg)ng

  Can electric field lines intersect in free space?f);jjh6arc,u

  A solid block of metal in electrostatic equilibrium 9a-yzx p9nnf,is placed in a uniform electricxnyf,9a -9znp field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of ev8sbeb /1ff 1d*)h,g; bbhx yyqual diameters are each given the samegb;xf/ v1e)ybb y*h hf s81d,b charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests onn7b .(kr9ijlzrczrp )jp7 l- 1 *)oeqc a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's 97p*in)1jzloql7j) e -rc .rp(kc bzrtop surface?

  If a conductor is in electrostatic equilibrium near anl/4m+n blp0ei electric charge

  A positive point charge iqw tyf j55/q9ms enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the holytqwm 5f9 5jq/low sphere has

State three properties of cosgp)v c:com76nductors in static equilibrium.

State Gauss's law.

  The charge carried by one electr ft*u:wm o99ox5:panbon 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.t,isvd4)dqu+6cjq 0sg ( x jr600 mC. How many more protons than electrons does this piece of plastic h g cuj4r6qx0v,sj)idsqd +6t( ave?

  What is the charge on 1 e:5b-*l bc/9fi v1.n exzg ejbkg of protons?

  An atomic nucleus has a b*5kbn/- .jogp xi -3;quathycharge 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 charge values of 2.0 and -4.0 mC, rzzrn2j 7(m/2w7o vjo n,zlh b5espectively. What is the magnitude of the electric force betweenm2v lr nj5(j7oz z2o/ w,7bhzn them?

  A 1.0-C charge is 15 m from 5iq1m(b 4ixe( c8fgl9mrd 2w la second charge, and the force between them is 1.0 N. What is the magnitude of2m48 f qw1dg lr xle59ib((mci the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart a1 swfka*x a:nnk 1p8c393hr mtre they?

  The force between a d99a8s7e uy/jpltpy is .f3t7 ft 3tw6$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm afvrr altoww4n. qbm*.(2wa /-part, experience a 1.0-N force. If they are moved to a new separation of rw b4m/a.2r (tlw.vo*wqan -f 8.0 cm, what is the electric force between them?

  Three identical point charges of /6. rusotfxdcf78wt5k z2t)p 2.0 mC are placed 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 1rd5 .z 7)f/t8cow ktsfuxt 6p200 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges g7oh*zz(hexa:+(dx s are placed on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C ox: *xasdgz(z hh7( e+to the right at x = 50 cm, 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 following positions:+s(34f0czt )p: bfa1skjan ol Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 41k(:jt)l0bz3+snasfofp ca = -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 se.(2r sz 8witzlcond point charge of -Q is placed at the upper-.(z8z srwi2tlleft 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 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); Q3 = 5.6k, od: +ly jyaymoo aot3z6120 nC is at (0, 0 za2+o3mo6 1ya:jydoot y 6lk,). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 n*gnk a li*gv+8C is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0*ka li+v n8g*g). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilat j8)othg9tyn8 eral triangle which measures 30 cm on a side. What is the mag9 t 8)ntjh8yognitude 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 what enb bez1f*8e o-fwx9- point, on a line between the two charges, would it be possible to place a be8* f9o-e1xbnz-efwcharge 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 p9x4h qvv4 gi*)q-n,tbbir6y oo j3k+eu4a5tat x = 4.0 m. Where on the x-axis can a third qh4q-,rx9 t nyi) abv4kg p+6* o3ivubo5t4ejcharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placedi1t .h 4hhgmf6 at x = 2a. Where can a thirdf 4gi.thh1h6m positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of t*(g sng*qmgp38d 8vf 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 the attraction of+ej:7zrac hrq3a(4 ox a fixed proton some distance above it. How far above the electron is the p r7h(rc4:oxe j+z qaa3roton?

  Two 0.20-g metal spheres +m(/6lldhpxft+)ws f are hung from a common point by nonconducting threads which are 30 cm long. Both are gi6lx+td) /+ lsf( phfmwven identical charges, and the electrostatic 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 ch0j62gsn6 n o mv,xmjo6arge of +40e. What is the magnitude of the electric field at a distance o,6 njoxns 602 mvmj6ogf 1.0 m from the nucleus?

  What are the magnitude and dir. cqv8ydw) sazc;a8b 851elqdc en:o 3ection of the electric field at a distance of 1.50 :.q8an8)s;y 8wcqvclde5b da3ez oc 1m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What i w26ai )qgdj.ms the magnitude of the electric field at the location of the tesjga2d iwm.6 q)t charge?

  A 5.0-C charge is 10hh0xj)rcdj1 p0el -6w/ho;ys; w c7wj m from a small test charge. What is the direction of the electric field7w/-xhw ce1 c ;jrlhyd;w)o0hj6pj s 0?

  A 5.0-C charge is 10 m from a small test charge. mcfu(b 5u,)0k6uxne q What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of t)mcuu,q xkf(neu 05b 6he test charge?

  Two point charges each have a value of 3.0 C and are separated b1fc xirzc2uv.(n a i+2y a distance of 4.0 m. What is the electric field at a point midway between the two chaivi .2fccrzx1(n2+uarges?

  A 5.0-mC charge is placed at the 0 cm marpr v170jh 9ta(; cwc;o yyc0cpk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. W7y co;09rpa ;( hctjy1 w0pvcchat is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick amedcvv8 3 g:4hnd a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the twm48c h veg3vd:o charges is the electric field zero?

  Two point charges of +3.0 mC wpw e3x, x -7.bsoq qnza00ao)and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the mbsxq)o0q o7,0a -x.p naze3ww agnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are atc i7o cibq9b8n5n4 :ia 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 ini 85c :c4ab9ib qno7center of the square.

  Consider a square which is 1.0 m on a side. Charges aru7fs7 xzmz*z1l nw/ /ve placed 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)z1 /7xzsfun7wm zl/v* . 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 elh(ksf5y 1v-n*:1csb tnhj3 ylectric fi *yh1b:sn ykjvfc5thn (s-1l3eld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mas yz1z;pu phqfr.8 p/1)5arvgds 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 l.)1ftc mpf(/ fftc5 wfield of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspendewlm( /f1.5 c)ctf ftpfd?

  A foam ball of mass 0.150 g carries a charge of1wnw,ps kk7h:an /1rf -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Whatsaf 1nh:p7wn /1wkrk, are the magnitude and direction of the electric field?

  A metal sphere of radmrfb 9 (22rmqrhq i93mius 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surmmfh 2 (932r9ibmrqrqface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is kz g u )+u;5bygkr-kh3the electric field 6.0 cm fr)y-+ rh 3;ugkkgzku5bom the center of the sphere?