State the law of conservqpcu,;2)d 4.umuotfk /iyi1q ation of electric charge.

  Is it possible for twk zin krs m9:ixq(h1c):u8 z3ko negative charges to attract each other?

  Is it possible for a positive and a negative charge to attrac+4s 7t3 g) -uzuqb.o/y wglvejt each other?

  A glass rod is rubbed with a piece of silk. During th.b2y:a*kp mxlc rh , o7cot(c1e process the glass rod acquire:l7yccm*oa.kr2x ,pc o1bth(s a positive charge and the silk

  A proton carries a

  The model of the atom sohz o775j5n jy2rgr/fhows a

  A neutral atom always has-; m(hoohd-)h/kcm wv

  An atom has more electrons than protons. The atom 0d).r/ exv,rqikvu3qtb, o6lis

  Materials in which the electronifu+a*n 9 k.ars are bound very tightly to the nuclei are referred tuf+r.n iaa9k*o as

  Materials in which thea 2msfx.xpcepp7r45)y kb (9e electrons are bound very loosely to the nuclei and can move about freely within the material are referred ()2sbcp 5r47fp9xe kemx.p a yto as

  A negatively charged rod is brousmqwqa )gnj2 :h:+,sv ght near one end of an uncharged metal bar. The end of the metal bar farthest fromgnv m)q,qj h:w+2s:as the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They ar;k swaf h6ft3 76bqsw7e placed near each okqsw t3wh77f f 66sab;ther on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged r7obz o3uneu 64od charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chargeda9d d)e00m tcy glass rod. The electraec0my9t 0d) doscope

  An originally neutra4nv+ lihtui2s -o5 dy2l electroscope is grounded briefly while a positively charged glass rod is held near it. After the gl o2n+iy 25lv4hi-sud tass rod is removed, the electroscope

  A positive object touches a neutral electroscope, aa,4f 4hgov4 mi;mb n.xnd the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Wi bmxg.o4fah vmn44 ;,hat happens to the leaves?

  A large negatively charged object is placed on an ix:/w klhg ,u j:lo:,b n.aod7u7 d5kqsnsulated table. A neutral metallic ball rolls straight toward the object, but stop:5b l:7 nhg/:os,7d.ok,lkdaw jqu uxs 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 the negative object. What is the final charge on each ball?

  Charge is

  What are the units of 0fmzoc2eq: u4 ts.4zothe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by ak.d+.j mgf/wi distance d. The first charge is larger in magnitude than the sj g+wkm.f.di/econd charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed n vpvbso :1;pbr 5()tb34bn0pc lgkv/ eear each other on an insulated table. Which statemenb0 lt(bgpbrvpc3 epsn5v;1bo) v4k /: t best describes the electrostatic force between them?

  Two charged objects attract each other with a cert 7+k), :+iaaxx; .tn. tpez ufwvs6awtain force. If the charges on both objects are doubled with nwz )va;:e7t+i.wfn. axpk axtts+u6,o change in separation, the force between them

  Two charges are separated by a distance d and exert mut y.1orx s1czo-ual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the ne1oc1. xrzsy -ow mutual forces?

  Two charged objects attract each othetuy,xb :6 3- mfei /oq)hl9euws :tlz*r 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:h q3t6*/tls :omwi )ebf, uyzue l-9x is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distanct- 16kx 2dwz db61q; kgp-v b/xdnso2iy8i8zfe of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first elect o6dfbqgx/-x2iv8n d-kzitp1zw y;s 6 k1d b82ron?

  An electron and a proton are separated by a distance of 1.0 m. What happens t6kols1r x8i xbb+b0owx,.8u q o the magnitude of the force on the first ele081+orq8. b,kxxibbw xus 6ol ctron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance eucy+k5 o 7w )apzr7o4of 1.0 m. What happens to the size of the force on the proton if tw k7yo4r7 z)5ac pe+uohe electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squarewcb t843)w pr1tmmg-j qo7 ..n v:mkal. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic tvt-3m 8qc1wlg npombw .)ka:7.jm4r 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 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 triangle. Whxg ko0+9/.ko zi*6 6pqzxtcl xen a second charge of +Q is placed at one of c px o/t*zoki906q+6. xxgzklthe 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 charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not g/ n:i*d ie+kbehe:x2a vector?

  At twice the distance from a point charge, the strength of the electric fiajkoxn+t347 ield

  Is it possible to have a zwnm9drpa13xgk:+s 6 n ero electric field value between a negative and positive charge alongp3kn wa6:9+xsmnrg1d the line joining the two charges?

  Is it possible to have a zero electric field value between two pos e0; 5n;wfwlm 4ats4zgjl(4qzitive charges along the line joining the tmwz;qlsenz(l 0g fw 4;5aj t44wo charges?

  Electric field lines near psitive1sw :tuw-z9dt*mv9we( lr, zh point charges

  The electric field showa98flgvuz ,l2 n

  Can electric field lzknc- ya+n +:fines intersect in free space?

  A solid block of metal in electrostatic equia9i99zsi zf k ltb*tfb6u*,z3librium is placed in a uniform electric field. Give a statement concerning the elect3bitb69,litzu* 9 faz9sz *fkric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of gb,f,z:m7 a( oschcs ix1.e1g equal diameters are each given the same charge, the electric field (Ex figoh.bcs,, zc17g ( ase:m1) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform;e*p2 libv 7l4nlx:39mm sohfhv 3 4jl electric field isi3b7lxlj 4m4o v*l l;vfe:hmh39np 2s directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in ele6 ttmc-pz9e s)ctrostatic equilibrium near an electric charge

  A positive point charge is enclosed in +:hg5:r klflka hollow metallic sphere that is grounded. As compared to the case : :+5gkrfkhl lwithout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibhe0 bc/q.a w;krium.

State Gauss's law.

  The charge carried by-/r 2d7*v(f/yrmx ct /byh jsz one electron 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 eus m4 r0lgdc*n55ab :1t)tag +2.00 mC. How many more protons than electrons does this piece of par4*cg gn )t5 a1sm dtlue05b:lastic have?

  What is the charge on 1 kg of protpdrh afw1 f wl)wjs+58l:q6m6ons?

  An atomic nucleus haal emtt)y95 5fs a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated byqn, iqlofp3 ;ti3e78 f 1.5 cm, have charge values of 2.0 and -4.0 mC, respectiveifielpotq ;3 3q8n7 f,ly. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them isg1jw5)byj3 j:ctg*pf 1.0 N. What is the magnitude owgc5 *jg jyp: jf1t)3bf the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Howr g*r: b5udmt rzvb/9n*5)ksj far apart are they?

  The force between a bv2vhrooh: 6 u 8vef-/$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. I*9;gqxl vt r m4gj 7p--pg9oskf they are moved to a new separation of 8.0 cm, what is the 9op;-sr9g7mx4 vqg g k-j*tplelectric force between them?

  Three identical point charges of 2.0 mC are plac k-r9b -tqtzx9)a4v loed 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 100 cm mark. What are4 tktovz)- a9br x9-ql the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges awyb8s.yv;awumk- g; z9:n xo k *2wf(xre placed 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 electrostatic force which acts on the charge8;.ua ;(k: x- f9 ws*owx bw2nyzgkvmy at the origin?

  Three point charges are located aot2 q+gdmh7 5ot the following 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 magnitude of the force on the 3.00og5+od 72m hqt-mC charge?

  A point charge of +Q is placed at the center+w5;3 bxlcvbz h stt93q *3her of a square, and a second point charge 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 chars r b +t3ct;eblhhq5z w33v*9xge 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 = 5jdq;s:kpsiw 51iiogp0/2 n i+.0 nC is at (0 ij+si52 1;qin:w/oig dpsp k0, 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, 0.10 m)),ctit:h fz1 j; Q3 = 5.0 nC is at (0, 0). Wh, f)hj:c tzti1at 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 equilatera9rzg* hy,p:aq l triangle which measures 30 cm on a side. What is the magnitude of the y*hq9za :r,gp electrostatic force which acts on any one of the charges?

  Consider point charges of 3 fn/vepa qe5u1li *.v+e 3zxb+Q and +4Q, which are separated by 3.0 m. At what point, ozexivfeb3l/pu*v 1qa n5+e .3 n 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 charge is at5/h6acrd:7- rximj t r x = 4.0 m. Where on the x-axis can a third c rmjc6/t 7hadx5r: i-rharge be placed so the net force on it is zero?

  Charge +2q is placed;of)3-sx tlpga az;r+ at the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so ;ta)+arz o;3 sfgpx -lthat the force on it is zero?

  A copper penny has a mass of 3.0 g. A total:vzne ; lo1whd4f h2u: 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 2jzh1ctf nn,g e3y/+b of a fixed proton some distance above it. How far ny/2 nzc, eh3j +fgb1tabove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductin n4,gloa/0vil1mw *vng threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until4vavm wn,0 i/*go nl1l the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus ha /xw1d9d /.qy 2gdsb9yq4wapxs a charge of +40e. What is the magnitude of the electric fi x sqd /gb49dwp .xwq1/9yda2yeld at a distance of 1.0 m from the nucleus?

  What are the magnitude and directiuip5xb+ o, 7mxj o) )t5/vlevlon of the electric field at a distance of 1.50 m from,pl)oj oxt55 + /vbvume i)7xl a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is thejn4bj* /c:.aei1y y uy magnitude of the electric field at the location of the test 4jeiyycyj:uan.b/ 1 *charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of:f iv7yxal6n9u5r*k n the elrfi7yka5l*u9nn:v6 x ectric field?

  A 5.0-C charge is 10 m from a small testu/w vd3 .x1 7t-ewyagxw qeh6) charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the testxq uwtw7y)eadxwehg./3 6 v-1 charge?

  Two point charges each have a value of 3.0 C and are eg4)6,tu q:l 3hektb1b)uk og separated by a distance of 4.0 m. Wha)g:l4uegu to6 1k qbeh bk,)3tt is the 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 a -4p n(n ,dtzzna4)cuj ;e9by8t4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm m z9c8j t;yzt 4na4ndu(bn)p,eark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick hzsm w*h8 01reand a -4.0 mC charge is placed at the 50 cm mark. At wha81hz0remhsw * t point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mCmlgwc9a:e )e/ and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the elec9gel wm ae/:)ctric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of t.b8w;jw+9r,wab5gh z dmn)(m*azsg qj a7p2 side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the centerwnz;.wq 7*bj8s +(tdwjh ,p zar5gga abm2)9m of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners o em82 o*( o kbych109usu8(xhdwq1 yvwf the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC1b9usv k2(wm(y x88c *hdow0yqh1oue 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 unifp 7hdn8 32ihdv. ty*wy8w(si form electric f7s8tv3 p dw hyy2i h.*wf(ni8dield. What is the magnitude of this electric field?

  A particle with a charge of 4.0act qnry9 40i) ikj+)s mC 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 g is plac838zbsm 6d:hkrj;nlr ed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspendrbr ldk88s6 zj;m:3hned?

  A foam ball of mass ijnt3y.vv/bq d a 6.(v (.kxkj0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspetvb .nkq6i3 .k((a.xjvv y dj/nded against the 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 isx)wbin8fwhze g1u.:qt7 s: 4m the magnitude of the electr sw):ef48m .7ixbthz ug1n:qwic field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm c kg*:;fsb5p2:twfw fy3b 2m,jtgum2a(k k1r farries a charge of 3.0 mC. What is the electric fiey2fm g1 wr*jk wm;tg,(:sf: ffakpu2kb3tb25ld 6.0 cm from the center of the sphere?