State the law of conservationubb 9t9al:z,mrdxxge: cn5 +/ of electric charge.

  Is it possible for two negative chargls639tmj8ikrcani(0 tuof6vd .d.1yes to attract each other?

  Is it possible for a positive and a negative chargeaqnw/,(bs qi 5g4 a1qt to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass r ;-7piyoq liq4od acquires a positive charge and the s4i l7y;o- qpqiilk

  A proton carries a

  The model of the atomy-bml+zl4 ha/ shows a

  A neutral atom always flfy+t5vz z3k+() gp qhas

  An atom has more electrons than protons. The atoms8( 9adw1cvr2 w c/ndv is

  Materials in which the electrons are bound very 1, ri6kiucyw) v;t cdh5a/ +bgtightly to the nuclei are referredi ;5vc1a, ) hr6kcytg/wu idb+ to as

  Materials in which themucs5n- mt0x; electrons are bound very loosely to the nuclei and can move about freely within the material arec0xms m- nut;5 referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar.hg:.c e owq1:p The end of the metal bar farthest from the charged rod will bec gp. w1he::oq charged

  Sphere A carries a net pos-cwna:he1x yjm6 w0ll99 i ti0x.m xk2itive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere-mxl 6klc . nx9ya e9ii2:h0x1t0jwwm B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electgrkdyk7/qq5u 3g:8 bl roscope positively?

  An originally neutral electroscope isi iqeh5 7mn9m7 briefly touched with a positively charged glass rod. The elec9m77iime5hn q troscope

  An originally neutra58hqb6z i61rbi3dvqx0 ta u.fl electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass 6xu3q5. thavrbdqiz0bi 186frod is removed, the electroscope

  A positive object touches3v/o. koa t;fo a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happ3 oo;atv. /fokens to the leaves?

  A large negatively charged object is placed on m mmu ydw ,u1zjuv8,p ;h1j-0aan 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 rolls forward, but does not touch the negative object. A, 1ph,ud;8 v-1jzm m uj0uymawt 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 cohwia .)z -p,xqnstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a djhtu 5* 8n4rgiistance d. The first charge is larger in magnitude than the second ch5irj4ngu t8 h*arge.

  Sphere A carries a nka:1ty +:ifkxet charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the elk x+kt :1f:yiaectrostatic force between them?

  Two charged objects attractaseknck5 :**e b.2.8bhh unvt each other with a certain force. If the charges on both objects are doubled with no change in separkk2hns:vea5et. bunb*8 h* .cation, the force between them

  Two charges are separated by a distanisbk9- 3bltskmyh/erfv45pbk 5 67+c ce d and exert mutual attractive forces of F on each other. 5cp9bb -vtemykk/sfhk 3i7 4ls r+65bIf the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects fqkx:fv4erk sp *7/,i attract 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 dist k :*,7 k4evf/srfqxipance 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 a distance of 1.0 m. .hwhyoc f7e(44gbtp* What happens to the magnitude of the force on the proton if a second e w*obhpg7 t.fyc(44e hlectron is placed next to the first electron?

  An electron and a protoc* anydb3+n 5pn are separated by a distance of 1.0 m. What happens to the magnitude ocb *3+5pn daynf the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton a(hh )tq y+*kvcre separated by a distance of 1.0 m. What happens to the size ofyh()q*t +cvh k the force on the 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. j)cdz 7q- z)yx4 ppay;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 ac- yz py)a4dj7;)xqzcp ts 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 an equilaterg1)*e wh)ffts*qkz e .l6g.rwwkz np w z56e64al 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 magnpk w l.z1r6g)wz5w*h6 6 z gqwn)kt.ef4sfee*itude 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 vecto ybo(p *r *fmj0yzuz/7(- )9+2renobfq eujel r?

  At twice the distance from a poi6y-flmqq 8 gy1. ;gwjnnt charge, the strength of the electric field

  Is it possible to have a zero electric field value beab7h 0nz7d+ zytween a negative and positive charge along the line joining n77+y dhbzaz 0the two charges?

  Is it possible to ha 2yqh5q i(qbgp*defys;ue5y30 z1q4 pve a zero electric field value between two positive charges along the line joining the two ; by5e 4si5p 2qz(eh *1 ypugfyqdqq30charges?

  Electric field lines near psitive p;jo t 73ijwub v)ph02ooint charges

  The electric field shown -2w1r +w5 x2pny;gbh ueuc s)t

  Can electric field lines interr h-ll qqvv(1r9a*:yq sect in free space?

  A solid block of metal in electrostatic equilibrium is placed x 2(ypmkoy2w .in a uniform electric field. Give a statement concerning the e k. o2xyp(y2mwlectric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal fwwbv e /0*np;diameters are each given the fwp0*;nb/wv esame charge, the electric field (E) midway between the center and the surface is

  A cubic block of alumdp,p9hk73u2l ojzm y;xfh9 jwq: i.x,inum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the chd j j.2xzyk;p3um,h:p lf,iq 9w9x7oharge on the block's top surface?

  If a conductor is in electrostatic equilibribo4f xl5 )mbk*um near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thatmgd, u:tr-yi p f 2sd0i7g17ut is grounded. As compared to the case without the hollow spherg t0i7g2 df,7uyts1id :pmu-re, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriuc0kx*8 ffq wd59)h5 gkagnpx to t,n//m.

State Gauss's law.

  The charge carried by one electronv ;e)mg8 hd:pce i6o0i4+ wsly 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 fwz(419mc)cd 7lbyghnet charge of +2.00 mC. How many more protons than electroy 47c1df9(zgcbhm )lwns does this piece of plastic have?

  What is the charge on 1 k:f*bz gx*v*k 77w ;,oosfmddzg of protons?

  An atomic nucleus has a charge ofw i.et05h a,bq $+40e$. 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 cha,jzs(+ablr 7u rge values of 2.0 and -4.0 mC, respectively. What is the magnitude of thru(7asj+l z b,e electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between theenz;*g zcs qh*/mx 6(nm is 1.0 N. What is the magn*;n nzes(hqcx6z / *mgitude of the second charge?

  Two 1.0-C charges have wjint3o 90z(n7r +czu a force between them of 1.0 N. How far apart are they?

  The force between a 5i9ee nb,ksvxrv2zq p)-8a y5$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, exp;t;ulzxpxwmx. h :5jh1p9 q,uerience a 1.0-N force. If they are moved to a new separation of 8.0 ; ;x xtu1qjl,u9 5mhz:xh.wppcm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first chx-bp4ox .df u4j+r a*farge is atrf.jd*ufbxap 4 xo-4+ the origin, the 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 pg/ vn 3cnkdk6 crn,+7on 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 electrostatic force which acts on the cn/g6+v,cnk 7p cd3rnkharge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at xqd2tdp (eu/.hcyq )0c = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC ah 0d( .d)2cy tueq/cpqt 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 th flc9wt*c 93:ccq9jfme center of a square, and a second point charge of -Q is plaq99 c*:f9cc wftjm3 lcced 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 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 = 5s vuj*x l4/4w-pzn zty1fiy3 5.0 nC is at ( j4nv x4w15sp/3ylyz - tfiuz*0, 0). 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 nC is at (0, 0.15) p1txq(-0 kiu +wzznqsi2a t0 m); Q3 = 5.0 nC is at (0, 0). What is the di50p +)wunz tak2(qi xz1-iqtsrection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertey* 62 h 8k5+xbbg gpbmyv;xb l(c4i:zices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic forcz*ihlx k6yv5:b;b p8 xb4+2e (mggcbye which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separatme;suq0 9o tb4ed by 3.0 m. At what poi sm;9 uo4tebq0nt, on a line between 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 and a +9.0-C chargjxcj g 3e 8rmq(-479w3dl tzyse is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force erq t- c7mlsy9j3xz4gd(8j w3 on it is zero?

  Charge +2q is placed arbfgt5byyr;+,m 0j(q t the origin and charge -q is placed at x = 2a. Where can a third positive charge +,rfbm0b;yj5 tr+ yg(q q be placed so that the force on it is zero?

  A copper penny has a mass of 3.a/ ugx v70kdrvd- t(c-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 a fixe;ylatj; a6,()1qirfm dqomg ;d proton some distance abo1;;6it )ymqda ar og (f,qm;ljve it. How far above the electron is the proton?

  Two 0.20-g metal spheres are9x:jh * grorl5 v90xk(ak 3scymo8ll/ hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion* k gx8 lox jl0rymv(kr3lc/: os9a9h5 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 charge of +40e. What is the magnitude of the electrimk3ri g j+1 g:3(h*hnojtwhe4c field at a distance of 1.0 m frj*o4 mr:hw3ghn3jt(1gk +ieh om the nucleus?

  What are the magnitude and direction of the electric field ac xbbjl kc4bmy: 28i mod1v+0)t a distance of 1.50 mcxdl4bbcjm y0 1)k2: i8o+vbm from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of 32y8cem v6lug the electric field6cvul 8gm2y 3e at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directionq fmoy6/1lmtzojc brs03 ,76x of the electric field?y17,m 0xfj 3/otm6obl szrcq6

  A 5.0-C charge is 10 m from a small ed:z 8x*74bfrc) cmbn test charge. What is the magnitude of the force experienced bc: * r4mxbnzdc8)b7efy a 1.0 nC charge placed at the location of the test charge?

  Two point charges each gjs 6n( s1jgx8have a value of 3.0 C and are separated by a distance of 4.0 m. What is txg1n(gjs86 jshe electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and bb0xnbzq/4 ;6 x ly17h 1 sjza9chd:hoa -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cmsoyb:4x lh 1jb; d/zz xba76cn19hhq0 mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.mkh)3 zunz-z 3 mojo;,0 mC charge is placed at the 50 cm mark. At what point on a lz3 o umz,jk3) mzno-h;ine joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -79l*v-h/vtf 3 lwaoe: e.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of h*evtelaf o v-l3w/9:the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sid- 5ezlfi;z u9ae 0.50 m. The last corner is occup9; -f a5zelzuiied 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./x0f db0 l4czes.hg7 io*xjp5 Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (l.sjzp0fo0/54 idc7e*h gb xx1, 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 unim1 tav:5hffy d1/uo )g9* q/ jmxu2fbuform electric field. What is the magnitude of this electric 1f1hmybu2 dm9 gvoju * qtfx5u a://)ffield?

  A particle with a charge of 4.0 mC has a )3ybxniw erqe48h:z-8ym) un 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 bnjpmf lqb0lgs-z+6mbj0)) vac 0 :f4electric field of 6000 N/C pointing downward. What chlvz:04 g jq) n0s a)f-f6lmbbm+p bcj0arge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge o/kmbau. gewv6;(ba d l u5k2.ef -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 the e./ gu e5dlbb kka uv(6m2e.;awlectric field?

  A metal sphere of ra-uf m;pk .gbmtc9.80h d-b2aeub0sac dius 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric f2agke 8.tm b-hb;p0dcs c0u 9 fb.ma-uield 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the e g05ob 6q.dmjgnt/,jqiz,;ac lectric field 6.0 cm from the center of the sj,ao 0 tg./ g5m,zdnjbqq6ci;phere?