State the law of conservation of elec9p+oga9dj8+4n exos wtric charge.

  Is it possible for two negative 2bea0a/ q;nay charges to attract each other?

  Is it possible for a positive andx6gvvns.u7o*5 wrr8h d jd.:b a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodbva (gof 0 .v:hi-qb/w acquires a positive chaqfw 0 vhiv(.a gbo:/b-rge and the silk

  A proton carries a

  The model of the atom shows agvlfws s1*670yshqx 9

  A neutral atom alwaysk1bxq nh1m 0wm-iz/-e +-.inhgapx l7 has

  An atom has more electrons than protons,s0gi9b-z xhy. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referrhg+3tjoz -:idvw9 bk- ed to9o dbgtv:z whj-+-ki3 as

  Materials in which the electrons are bound veua/q+ thju; * 1bjw*ewry loosely to the nuclei and can move about freely wuw * bj/t;*1 haquej+within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. The)p1 6-0jgfhm3xrgi- l6qb ccp end of the metal bar farthest from the charged ro1-pjl6)0c 3-gfm6rhg qci xbpd will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are yfrs4-smu ny34ye9w7 placed near each other on an insulatywn 4s3y ey7u49srfm-ed table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chard-2v/zyhhf 2( z7jrm mge an electroscope positively?

  An originally neutral electroscope is briefly touched icq- .u -10bz;y n0t6f fgddkzwith a positively charged glass rod. Thqydu.z;k-gti6f1 0 fbz0dc-ne electroscope

  An originally neutral electroscope is groundedo mz;,:buj 0y 2gbzi0x briefly while a positively charged glass rod is heldjy xu2ibz,m:0o0 bg;z near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leavi7zpqpd*- +boes separate. Then a negative object is brought near the electroscope, but does not touch it. What hap* q -di7z+obpppens to the leaves?

  A large negatively cha9k/lyu g8* 0qnvkf0vk rged object is 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 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 time does either ball touch tkn/9yvg vq*uf0k k 08lhe negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb c8t* :udvoslj7+(g lw xonstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a y bd2nwao: c b e3w-*;7y4ebyjdistance d. The first charge is larger in magnitude than the second ch nyy*d7bwwe2byj- oaec;: b43 arge.

  Sphere A carries a net charge and sphere B is neutral9yat.)n :yotrn4 v2fq. They are placed near each other on an insulated table. Which sta2f)9 q :yvtnntoy4 .artement best describes the electrostatic force between them?

  Two charged objects attract each other with a certsn *./to q.bmnes4y h73wa)fyain force. If the charges on both*n3ty) s a4qb.sw.y7/ohem fn objects are doubled with no change in separation, the force between them

  Two charges are separaty(yqsni(5 ) c6f i g+gnn5k(hjed by a distance d and exert mutual attractive forces of F on each other. If the charges are separated biyc5kg)i(j5(gny+nh nsf6 q( y a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a fok: 7gl2:pq5bb cqiub1jyh8l8rce F. What happens to the force between them if one charge is doubled, the other charge ilb jk:yq i1c7hqlg2:8bb 8p5 us 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 separated by a distance;g7nu- ikgv090c2s jmrh l9 ur of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to v0 m9n su9;h027c-uilg krgrjthe first electron?

  An electron and a proton are separated by a distan48 qukofu5turhw 4/ x5ce of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed/w u5qf5 txh8r4 4kouu next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happen4p yt./*;xn qubiwzm;s to the size of the force on the proton if the electron is moved 0.50 m closer 4m;uibwx/ ; tp.n*qyz to the proton?

  A point charge of +Q is placed at the center of asf2w5:jq dx8rn( p 5iv 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 magnit5d 2(rvpw5 nfq8xs j:iude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed a nmzr tks2as65pvo;(t8xch + (t the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangleatc2z k;s(prx m+s(t8 on56hv's 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 not a ve+./x)css mbzxctor?

  At twice the distance from a point charge, the strength of the electric fie xfga9rkz14i/cf1.dg ld

  Is it possible to have a zh3mzdb/*w+n1 ;q +n izb lp +pxw5l4zxero electric field value between a negative and positive chargeidz;zbblq+ /z+px1nh4xp3w+w *n 5m l along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive chargjuyu (khm/f 8yxq4 7kam2+zh( es along the line joining the two chargym/kz+myu7qa2 (xkfhu48 j (hes?

  Electric field lines near psitive point charap kx2lm;ch:.x fg .5vges

  The electric field show th/qd:b6(vxx: d2jhc1zf *nzn

  Can electric field lines intersect in fqn +o ife2*5ttree space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elec rf;z ;om4y:yetric field. Give a statement concerning the electric yf4y; rez; om:field in the block's interior.

  If a solid metal sphere and avf jqxu wugef0vy t,jck,ue-u 9/*)(. hollow metal sphere of equal diameters are each given the same charge, (. f0u ej xj*/u9fyvk,c- wue tg,v)uqthe electric field (E) midway between the center and the surface is

  A cubic block of aluminum qj 0+x -92l,mv wlzbjvrests on a wooden table in a region where a uniform electric field is directedvwvx -0l+jbl,m9 q2 zj straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrtya49 6 nwlk10uua+saostatic equilibrium near an electric charge

  A positive point charge is enclosed in a i; g-ne3fr( dovhd4v 8hollow metallic sphere that is grounded. de-8iv roh3d g ;nfv(4 As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in staticksew8u9qd ek2 1 /eu9u equilibrium.

State Gauss's law.

  The charge carried by one elew88 .+ j(ig5c qoptz ,g;irktae9g0mkctron 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 m kr:v,bo(8+ agr* tnaeC. How many more protons than electrons does thit ,:k*(8an r rba+egovs piece of plastic have?

  What is the charge on or*/s kyhn)j8 1 kg of protons?

  An atomic nucleus ha6q pn,4mwn: dyguo 2r6s a charge 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 ch8k lrg;;w i*a*f (wfglarge values of 2.0 and -4.0 mC, respectively. W *l lf 8rf*;gkgw(w;iahat is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betw8 dva:5 1ngbsueen them is 1.0 N. What is th:nu 5bavs18gde magnitude of the second charge?

  Two 1.0-C charges havemhe9+*dl7 b wze:x ld6 a force between them of 1.0 N. How far apart are they?

  The force between a ,bdp zwu.l-sv)2key.* i cx+j $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, inis gqaim57s0l*0* ye ywk9 :llstially 2.0 cm apart, experience a 1.0-N force. If they are moved to a ne7lsek s0iyg*q9ysl5l a:w*m0w separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The firso 0uvzkx2 4e,et 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 magnitude and direction of the elec2ev ,0 kouzxe4trostatic force which acts on the charge at the origin?

  Three point charges are placed on the(i;: t0wfjb;lv, d1h; cfrtqm x-axis. A charge of +2.0 mC is placed at the origin, 0( c:f tqji;;v;tmdbrlwf1h,-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 charge at the origin?

  Three point charges are located at the folloh*ddxb 1l b0x8wing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -8d db*hl10b xx1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed dry1osp: q um q2b2c5kwf 1ie7paq533at the center of a square, and a second point chare 2q7bfcmyqr25:1qw1dpuips oka35 3 ge 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 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 = 5.0 nC0safcot4ut d hqnd5,mso:m 1,-nvf:2 is at (0, 0). ,m2ddf1 qv:s c -5f0toohatumn:4 n,s 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, 0.10 m); Q3 =o+r35e yeqk. is. nf0i 5.0 nC is at (0, 0). What is the diriqe 0+eyo krs53nf.i .ection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an eqxd,b3) hm2vki2h ua (cuilateral triangle which measures 30 cm on a side. What is the magnitude o3xuh(k) c ibd2,hv2maf the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are se4 ,m;xfcb zxd6parated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of dfx6cmzb ;,x4 -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +dd y(85n va2dtzz,b8m 9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is dd8n v(ab5zyt2d8z , mzero?

  Charge +2q is placed at the origin and charzzeiumo 07u.r-h. 3b y-bj :omge -q is placed at x = 2a. Where can a te-iz7bz: oumy.umo j r-bh.3 0hird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3. 73vjflni2o81p:rk.iz-p alm+ 3b18x da v ctd0 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 fixeg5 n6mj vtb61fh :uc/rm7a9bl* b .zhcd proton some dista5: .vlj mt9cr/ b 67bhba z6f*ucm1ghnnce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point p f( ixbx.d,87mlpg ox9o gq;ln6 1t0eby nonconducting threads which are 30 c lbfp1nm 6x.x (ixtdq,gplg7098e o; om long. Both are given 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 charge of +40e. What is the magni :-x* kkbmz:,4jm shkgtude of the electric field at a distan*g b : zskm4xkhj:-k,mce of 1.0 m from the nucleus?

  What are the magnitude anqgtem hx. ch;z.0( d1cd direction of the electric field at a distance of 1.50 m from a 50.0-nC ch.gq1d0e(mh ;ht c zxc.arge?

  A 5.0-C charge is 10 m f ndlm,q3it6remw5 s4 (rom a small test charge. What is the magnitude of the electric field at the locat,nmrw3t sqle6md(5i 4ion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dir(t ,kj,(ff 1f)zyxnc)jd +fxmection of the electric fiel+z(,myfj xdj ) )ftxc ff(n,k1d?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o w:l ( jx5p01xmtgati 04.ohoff the fx10giha op wx4t0f.t ml(:5ojorce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and6whm-tgg 6gdb(xl 66 d are separated by a distance of 4.0 m. What is the electric field 6 6tgw6 6m -lg(bxddghat a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a wtoel11)idncf):wp ep,* 3sk -4.0 mC charge is placed at the 50 cm mark. What is the elecd o 3epe *sp,1c)wl1t:kwinf) tric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic(w8iw awt: zk/k and a -4.0 mC charge i:/wak iwtz8(ws placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed a8kv*aj5j1ce ut x = 0 and x = 0.20 m. What is the magni ejj5c*1a 8kuvtude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of siks 9t8: 5q.qilvkt) obde 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the eqikt obq8.k9)stl:v 5 lectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed g5rwvm,u; g d0at 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). What is the magnitude of the electric field at t;5guwvg d ,0rmhe square's center?

  A force of 10 N acts on a chargv2:w:d .reqox e of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electr:vdxr e2w:oq. ic field?

  A particle with a charge of 4.0 f.t4ha6 sj7l8k7w lylem:a 0 zi9qz(zmC has a 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 dxxzu(dn z *, 0bw/x6ug is placed in an electric field of 6000 N/C pointing downward. What charge mus60n/,x zuw bxxdd (*uzt 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. The ball is placed i w:okupvsl:1/ nside a uniform electric field, and is suspended against thep1u: k:v /owsl 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 t3c32ehtl:sr6w dhd 9ghe magnitude of the electric field 5.0 cm dc swd2htg6e3r:l39 hfrom the sphere's surface?

  A metal sphere of radza9cj; njqoh gt 4 2yp4/l/e8gius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center4g4;z/l 2ac9 oqpt/ 8 hnjgjey of the sphere?