State the law of conservat 0lw7eeq/2 em zqnh a1;yajz,,ion of electric charge.

  Is it possible for two negative charges to aj)pi kburfv - nx:v*4+ttract each other?

  Is it possible for a positive and hhxgo d+ch55 6;t:hiha negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass r,fz7jxje*s h;bf;p q6g6lo7 god acquires a posiogg;q;sb 6p fehj,xlj*7f6z7 tive charge and the silk

  A proton carries a

  The model of the atom show in5jwwmj -9-g)g-wup s a

  A neutral atom always 5qgr:u im2k1dhas

  An atom has more electrons than protonkbzbsonlg+ 8x 53 , vh92n6bees. The atom is

  Materials in which the electrons are bound very tightly to the nuclalaf lz+/s.*z* xo *8fn5p8gm7gqfq zei are referred to /g7zqf s8lf*n gqx+z *f8 p zmaaol5.*as

  Materials in which the electrons a/n d/soo0w6st re bound very loosely to the nuclei and can move about freely within the material are referred sn0oo6ws/ /t dto as

  A negatively charged rod is brought near one end of an ur n b6v2k.p(joncharged metal bar. The end of the metal bar farthest from the charged rod wi.2ok(6 nrjvp bll be charged

  Sphere A carries a net positive charg,3m8fjccvsn,pv*4jv 8s ze r6e, and sphere B is neutral. They are placed near each other on an insulated tc4p8c jevsr,z3mn 86sj* fvv,able. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively ch+ 2x) ial *t; 1:oxgwdumtaxz0arged rod charge an electroscope positively?

  An originally neutral electrnwgk s.xz1h1cfbn: ,9 es: )hooscope is briefly touched with a positively charged glass rod. The ele:)w. n :fsh9socx1ge,zn1 bkhctroscope

  An originally neutral electroscope is grounded briefly while a positively chay;sbny 6ny+gnm9 )x ;arged glass rod is held near it. After the glass rod is remov+nm;ya 6;)xng y y9nsbed, the electroscope

  A positive object touches a neutral electroscope * li/xlibv7*lwl)x1uj*t * fszw 8bp-, and the leaves separate. Then a negative object -uzlwx7lfj1 l pb*s ) vt** x8li/ibw*is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objectfwyq rh9t) h9*78.w cxnpo/7hl (ntht is placed on an insulated table. A neutral met8h/f ( t)77hwh l9y xn9 h.ntp*corwqtallic 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 the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constao*3nc:02gpav hsd;gk/ : xmcgzt xu ;s4 ee+s,nt $k$, which appears in Coulomb's law?

  Two charged objects are sep+9 zl-*ht kuacarated by a distance d. The first charge is larger in magnituua- chz*9+ tlkde than the second charge.

  Sphere A carries a netmj;s+evo83f yi u.; ;lgtrzy0 charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force bet3teg ;lu+ij .rv8 o mzy;sf0y;ween them?

  Two charged objects attract each ok/):ch3qfbsio.8 tnz ther with a certain force. If the charges on both objects are doubled with no change in separation, the force betw it3h)sof /c:zq8bn k.een them

  Two charges are separated by a distance d and exert mutual att3 iembx8t mdx6z /5vo7ractive forces of F on each other. If the charges are separated by a distance78x dtv6mo5 exib3z /m of d/3, what are the new mutual forces?

  Two charged objects attract each other witm5u,w zz4/*wsu1l;q ,y 7mzwakm+zn xh 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 is wmwl,+;1qz xuan yzs4 kz 75 ,u*/zmmwnow equal to

  An electron and a prot(,i bvbq;.vi co(sw 6mon are separated 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 fw.m;i(6vqc oi ,bsvb(irst electron?

  An electron and a proton are separated emb bawo,w:2r,toz )(h6;e e cby a distance of 1.0 m. What happens to the magnitude o2: wceaot6,) eh(b;,mw erzbof the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by:7.lk nntj. 0hf qrh9 igqe)afa,ew-; a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m clo.; 0 fk: fea,nnlj9-h7qaihqgt )r w.eser to the proton?

  A point charge of +Q is placed qy5 )gpdekrsr0z7 o7d tb5a2)zau5 2q at the center of a square. When a second point charge of -aea055 d d skr u pr7g7z)2qo2t5)byzqQ 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 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 triau- alv*,;yeu05pkkyw tfb8c*ngle. 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 magyat0lkv *buf ;uwyk* 8c,5p e-nitude 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 9p6)snr99uc21 fofo hk7a f cuis not a vector?

  At twice the distance from a po-. esko4g 9pcdint charge, the strength of the electric field

  Is it possible to have a ze w2 sgllm)ext(f)-r5s ro electric field value between a negative and positive charge along the line join lf2mew5) (lgrx s)-tsing the two charges?

  Is it possible to have a zero electric field value between two cram dx/.0uc; if71xg4hg7 dxpositive charges along the line joining the t07cx7hm u d.r fg/axigcx14 ;dwo charges?

  Electric field lines ne 81 ecriexedd /:3yla/ar psitive point charges

  The electric field shown ntyj9pq 1 ae92kzle0ik;8wg 8. h4afl

  Can electric field line x+g5, dfxvas2s intersect in free space?

  A solid block of metal in electrostatg7qxzv8ap/u ,ic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in 7pg /va8 qux,zthe block's interior.

  If a solid metal sphere and a hollow metal spmc p gf ,lk*,(/kv/fbhjc8ga)here of equal diameters are each given the same charge, the electric field pjbm ,8a* g/gvkcf/ lhc)f(,k(E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a :w kw+pxjg 24auniform electric field is directed straight upward. What can be said concerning the charge on the block's top surfacp2awwgj 4+k x:e?

  If a conductor is in electrostatic equilibrium near ani5h ge;3z1ehu electric charge

  A positive point charge is enclosed in a hollow metalligxns 6k;)),ib su3c:f i )klxhc sphere that is grounded. As compared to the case without the hollow sphere, the elec;lkx)s)3i)hkx: ,suci gnb6ftric field at a point directly above the hollow sphere has

State three properties of conductors il z wzo-h92h:k7cu/uin static equilibrium.

State Gauss's law.

  The charge carried by o: u h*ah+wjo7xne 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 chiqcroa6yo esx1kfl q -3*pge9 i/)(y2arge of +2.00 mC. How many more protons than ele6 ierieaqkl) y 1oyopqf2(39*gxs/-cctrons does this piece of plastic have?

  What is the charge on 1 kg of protonecij xjmd98g-abg-mf46/+mos?

  An atomic nucleus has mrspgp (m4a7q(j le6 9a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated btvp tif-u 8teg/i8r* n:mq22fy 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force *i2f2tvr- :upgt f8/m qinte8between them?

  A 1.0-C charge is 15 m from a second charge, and the fotv45o bp-k,m arce between them is 1.0 N. What is the magnitude of the second charm,5v 4 kap-obtge?

  Two 1.0-C charges have a force 6wz;25oh fq-kaxd27sn tsfm 2between them of 1.0 N. How far apart are they?

  The force between a gvqyq s .4r2r(iv3c:f$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience aq0: ln vuo ;uv, (abr-*xt5 +wpyau;sp 1.0-N force. If they are moved to a new separation w* n0v+5abl qp;-to,v u(r;sx:yaupuof 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Theomnlokla.54 5lp:u c 0 first charge is at the origin, the second to the right at x = 50 cm5p ollc4uk5 .naol0:m, 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 charge 4cpnz 5s+wdo kv5s/wzx c(: o+of +2.0 mC is placed at the origin, -2.0 m C to the rzpc s+45o+:(wos 5kzcxnvwd/ight 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 :y)gi5chw t4 uuew26 eare located at 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 o2ycu 4h egtw6i:w) 5uef the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, andjdp*mgya, f44wt )qn: 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. Whaf w pa4:4mn,*j)gtqyd t 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 = 8 pf+*6em dc6wt a4iyt-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force + a tmic4wep6*68dfyton the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 fmx:b2 qqsh:tm y06n(= -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). (6xnqtms: bym0 qh: 2fWhat 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 f:uz8 ogs h +mlqi.49ean equilateral triangle which measureqhm9i+fu 4s:ge.ozl8 s 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated f4fyyf93fp b4h 29 bzqby 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the y492h b4fyf9fbfp z 3qelectrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge t7 ex7fiakcvzxp9 ;14 is at x = 4.0 m. Where on the x-axis can a third chargexk47;ixv 7tfe z9 1acp be placed so the net force on it is zero?

  Charge +2q is placed at the origi. ;pyc hwb;0teu2 h7ywcbw(j7 mmva7*n and charge -q is placed at x = 2a. Where can a third positive charge .b;*;mj e tymhu(awc h727vpcwy7w b0 +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A twak :ivbye,1 8s.mjm/otal 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 grav3mpbl 06moo0n ity by the attraction of a fixed proton some diso6 m l30b0opnmtance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point bk4fv0ut ;yg jg+.5*qygz10v;p7j aqu0niu aky nonconducting threads which aqa0 guujgngj vyy az. fkv00q1u;+ i5kp7t4*;re 30 cm 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 magnitude of the electric;5a 6z8hg iawlo2d.jl9w6 drl field at a2 d8l 6z6wdla .o5w g9hja;lir distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the elecpzg4fzl4z39-5e) nt l z4j msstric field at a distance of 1.50 m from a 50.0-nC c5zzne4l tlf-4)zg34s sp mjz9harge?

  A 5.0-C charge is 10 m from a small test ciyrn 1.x c7+isharge. What is the magnitude of the electric field i+x1i.yr csn 7at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction oblf -m1e4 k gjw kg+ar4yp uc+k, hvf3ro-)6o4f the electric fiea-6u3+or)wbvlgreg1fp khm y+44,cf4 -ko kjld?

  A 5.0-C charge is 10 m from a spnf6 jp(l+y.tc1p htx 6 p:j dwr5dn).mall test charge. What is the magnitude of the force 1 5tpnx.d. ppyr6whnt ldfjp6+j c:)(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 and are 9m)qzvz mr,r6*a5i wfseparated by a distance of 4. ,9af) z5z*m vwrrmi6q0 m. What 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 gf6sn( c:1dn*+/h xdif gf p7xstick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm m/f7hf 6n*igp+1 x s:c(dxdgn fark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mn8u1ql0ivt2re.lu ) uq(la7r C charge is placed at the 50 cm mark. At what point on a line joining the two chut8 (lilq0elun2)rra1 qu .v7 arges is the electric field zero?

  Two point charges of +3.0 mC ag 0 d3z*1g2nhofsqx/and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwn*0gqfo2gax3hs/z d 1ay between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50h kuq+dt2n( 5yy 58e64xfkgpq m. The last corner is occupied by a -3.0 mC charge. u( dptkfy q4x562qn+e gky5 h8Find the electric field at the center of the square.

  Consider a square whi3pnvak s m/r92ch is 1.0 m on a side. Charges are 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). What is the magnitude of the electric field at the square's center?9mp/3rk a v2sn

  A force of 10 N acts on a charge of 5.0 mC when it is placed in tsuu5x+ufk x :*) qz)aqvobg 6e;11f ya uniform electric field. What is the magnitude of this electric fiel:1auf;g)tx6 kqyzeq5 u u+ xv*fb)1osd?

  A particle with a charge of 5yfy:ykpkk5vnb3)e r1be 8 k- 4.0 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 placed in ae(atvuom( ml)mz5* 4gn electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to(vetm)u(*g 5 oazmml4 be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.0o,qn2h q6w/ ka-9hx zpm innx;9so9 ,t0 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 electri/h p n9n qa-9,ktq ,6mnzxhowi;2ox 9sc field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What isir;zh7 ,mny3v6ywe* a the magnitude of the electric field 5.0 cm from the sphere'n67 y, *mhrwi zev;ya3s surface?

  A metal sphere of radius 2.0 cm .c v e* /+ukf1lz jyf)ivny( )vfpo)0ccarries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphereiue(pcclj.kvv) ffv+n y y01f o *z)/)?