State the law of conservatpjs lnn unej 7hi f;90,(z5oi-ion of electric charge.

  Is it possible for two 6 f qo+ws0i+vxk3f0zz negative charges to attract each other?

  Is it possible for a positive and a negative charge tc,yj8cf t* .avswl66to attract each other?

  A glass rod is rubbed with a piece of silk. Duoi s+xgsv+ c xzlr/k - 31xo-6lo(kt6cxzed-9ring the process the glass rod acquires a positive charge anks/ oelz6kx 3o-v+lc+dz( g9c 6o 1-isxx rtx-d the silk

  A proton carries a

  The model of the atom shows 0vwsyxgo80/bq o k 3ed/0g (,kxom: opa

  A neutral atom always hhb / v x660r w kp33zsgjdpyw+fcf82d8as

  An atom has more electrons than prosy5+t vw3pv u:jd-ot: vu)7q ttons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei 5 62c 9vyhnlktd ;5 o5vvuufl)are referre n;65cu59lfydvo 2hv )5 lkvtud to as

  Materials in which the ele7 j;hjmq k1)koopj 3* 8jkcyw.ctrons are bound very loosely to the nuclei and can move 8kkjkoj;jm 7qp wc.ho*)j1y3 about freely within the material are referred to as

  A negatively charged rod is brought nea.b ;b+m w6qte pk iz4:tr03zxsr one end of an uncharged metal bar. The end of the metal bar farthest from the charge 630kz r+btmt.biq wx4zp;s: ed rod will be charged

  Sphere A carries a net positive ,t1perzb74 1jzp 3yicuwdk6v69 a,dg charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which k ye9b,431 1,uji z6p7rcwtv d6dga pzstatement is correct?

  How can a negatively charged rod charge an electroscope positivel:hr)sc9c. 0 tm8et1sk 0uxiuty?

  An originally neutral electroscope is brievfagq,*p2s xn7; j7e rkn.1gjfly touched with a positively charged glass rod. The electroscojv*,2kn rg.7q pn7 j1 axfg;espe

  An originally neutral electroscope is grounded briefly while a posit4au 5kdc gkhg e(p7-f/ively charged glass rod is held near it. Aftergc 5a7deg hu-/pfk( k4 the glass rod is removed, the electroscope

  A positive object touches a nep 9dq*c(nec*fy cd:/sutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happe(df: py/eqc*cnc*9 dsns to the leaves?

  A large negatively charged object is pv/u bxtr*1sy,b3xk4s(e3drplaced 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 touchyd ub3 (x *x4/ etvkr,s3psr1b 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 -,e0oexfu cq+constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chasr qk6d(bd. gapz :ro s/d69-prge is larger in magnitude 6 sdbg:(sa p -9z. 6/prdqokdrthan the second charge.

  Sphere A carries a net charge and sphere B is neutral. e+p1a hvb8z w7v en+y*They are placed near each other onbe +vyn zveh7a+1w *p8 an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If 41v* xh8q(kqvs reu y9the charges on both objects are doubled with no change in sxrq ( eyqv*4hv1u8k9separation, the force between them

  Two charges are separated by a distance d and exxbd s6i. r;uh sc -z n.j0b39xze7ysc n*k4r6qert mutual attractive forces of F on each other. If the charges are separated by a0b;sz96ecu .isy7jxzrb qkn. *34cdxnh- s6r distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to ezd4-jl1w - fwthe force between them if one charge is doubled, the other charge is tripled, and the separation distance between their cd1wl --ejfz4wenters 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. What happens ry /exan /pr oq/)o/n*to the magnitude of the force on the proto/xnn q/r/) peyooar/ *n if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What haps8uousbz 72k9kx ) s5zpens to the magnitude of the force on the first electron if a second electron is placed next to 5kzo sxsksb u7892u)z the proton?

  An electron and a proton are separated by a distance of 1.0 m. Whawj9x x0t3:uh2 lm1jsqt happens to the size of the force on the proton if thes3x9utjhx:j0m w21ql electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. .5 *nij2hssy z 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 magnitude of the ny j.zn*2sis5h et electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is pldre:9w b0p8placed at the centroid of an equilateral 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 charge due to a third charge of +Q placed at one of the other verticesw98 rb:ldpp0e?

  Which of the following is not szwp 0ay7 khdv(z- e7*dm9n:la vector?

  At twice the distance from a point charge, the streng0 k;wq5s: uqfn k09mkcth of the electric field

  Is it possible to have a zero elux ,/(tiw6 pxhdl ,wcwa)+5xzz;. xluectric field value between a negative and positive charge along the l)6xz+w.u;,,hx(5xdza p lci/ wut wxline joining the two charges?

  Is it possible to have a zero electric f- 7qu /amhbzr,ield value between two positive charges along the line joining the ta-7bmhrqz/ , uwo charges?

  Electric field lines near psiting.j.xnkc ayk*fl38)ve point charges

  The electric field sb+not6/v f4vkq8m v)/m iik9mhown

  Can electric field lines intersect in fxljpq2t4/ -vfree space?

  A solid block of metal in electrostatic e1h;uip.-q t1zseui7 +,syp arquilibrium is placed in a uniform electric field.t+1 up huqrp;y7 ,i-z1 i.sesa Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gi +5mra/zxw9r:sb0.de fnkqd(vbn90:xqe ./wm+sk drrfdz a(5en the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tablee2p44qqnfvi 4 in a region where a uniform ele q4v24p4nifeqctric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electricffpv3 6fj so y6p)w/i; charge

  A positive point charge is enclosed in a hollow l,;9kjpc9; az*yhlqqmetallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly pqk,;lqza yjh9l c9;*above the hollow sphere has

State three properties of conductors in static equilibri*yu:u4s98lwzv u;pt sum.

State Gauss's law.

  The charge carried by ecp)fust64s7 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 +2.8f-1279gugaee :w pb dup)rno00 mC. How many more protons than electrons does thi foa7)g:nu9- r81p2u dp wbgees piece of plastic have?

  What is the charge on 1 kg of protons -qk.emnpu30b?

  An atomic nucleus has a charge of/ 6tb2 mv5edz2 prm-fs,or): (yxmsvh $+40e$. 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 t adjy+-8rqzv85c m3g values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betweejqgz8 mr at8d 5+cyv3-n them?

  A 1.0-C charge is 15 m fro(5d06q tzs xkctlu5uh)ge462xyp o +am a second charge, and the force between them is 1.0 N. What is the magn+ 5g62sx)upd4qoltzeu 6tx5yh ak(c 0itude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 bmqb;3vv jg vs oraimi-j554p8x3) 8z N. How far apart are they?

  The force between a f;7 oe+*f +d:k;oiw ap .mynag$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, tl)b dempm1c6jqeg86 vz;4 (lexperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between thed)elz;eg vmcm 66jq4 bl(8t1pm?

  Three identical poinpmcl5: +e8 gui0 ju-hat charges of 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 100 cm mac : +-e05phim8gajuulrk. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placedo/bbbn1ipoi k1 51vt 9 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 electro1 okbbb9oin/tiv1 15p static force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mtt0 z- tijh.8di ov o.lgod4x,i66j1vC at x = 1.,v6l gho6d tiz-v o.t8o1 j4tix .0dij00 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 3.00-mC charge?

  A point charge of +Q is placed at the center of a syzt.j/nkpbq:t4 4 v v1quare, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force opvzk4.41yv: jb nq/t tf 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 nC is gu1 a:tbydjn:f 0))l gat (0, 0). What is the magnitude of the net force on the 5.0 n))n ltbd:gj:10uyfagC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m)9vi;v lbl8 oh*; Q3 = 5.0 nC is at (;hb*ovvl 8il9 0, 0). 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 equilateralh tw1x/ff0oydmsk 896 triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the hofk t09fm x8/6dy1wscharges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what p m:t3+mz68b,v4uyvww d l vis0/l,xgpoint, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting :dxvzm,/g ivw3v yl0 tw8u m +bp,l6s4on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chdvq l/ pbwe9+r.0.hs karge is at x = 4.0 m. Where on the x-axis can a third0dr e 9+ psq/vbhlkw.. charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = jsh ;/tsimqi85 yfz- /2a. Where can a third positive chargy//8jmizsst; 5 fqih-e +q be placed so that the force on it is zero?

  A copper penny has anrxvpmt )w;( 4 mass of 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 m.v/y3gyr5b lqxf) .dt 7dtd4 pmxa0, the force of gravity by the attraction of a fixed proton some distance above it. How far above the elecldb a.)4xd qm0v3y 7 ty5,pgdfm/xtr. tron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nu v:h t)hj(p0rf7s6 -veinp e-onconducting threads which are 30 cm long. Both are given ihr)fi7 ph -0( p6jteunvevs-:dentical 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 magnituderor - 9ywf n/tz*(h,fd of the electric field at a distanchn f(/or,t*f wd 9yzr-e of 1.0 m from the nucleus?

  What are the magnitude and direction of t:e+b6fql fq*mhe electric field at a distance of 1.50 m from am ef l6*qf:b+q 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What q 4 /kssz4hka vci((.h :hmf/z3 wcso2is the magnitude of the electric field at the locack 3 hz hhow4/(cz/ kisqfs.s v:m4(2ation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction glyzk3 t bp+/kj,1+ y3 p3cpnbof the electric fielpbl3,pt yk 3ybzj+/ng1kp3c+ d?

  A 5.0-C charge is 10 m from a smalz-08hxlgix:xj/ 5u6 az och+ll test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the xz:i+ xh5xco6 0l a8zlu/gj-hlocation of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a d -fnbku07fsn2 icjqj1+n9p.oistance of 4.0 m. What is the electric field at a0q u+.sjc-nik 7b2n9n jpo ff1 point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter6*jh5+ / oyejzhj+ wsr stick and a -4.0 mC charge is placed at the 50 cm mark. Wha+rjh6* s jjh5wzyo+ e/t is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark ,pq qb tbuz :re 5i*pu*n;a+ bpi6e8x8of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the qbn*p65rt xu eu:p*ai q,8;8 eb +zpbielectric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and xlgnfn1)d4x c2 = 0.20 m. What is the magnitude of the electric field at the point mid f24cn1 ng)lxdway between them?

  Three 3.0 mC charges are at the three corners of lib16 3uyqs/u8*l gola square of side 0.50 m. The last corner is occupiedyb ouqi *sl8gl/lu361 by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m oo mc yu02c*b5z:6zzg)k ywg *zn a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1wcc z2buzz0g)6 5m:*yyk*z go , 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 jk s6c5hv5q4kp z g9oj)u (cf)in a uniform electric field. What is the magnitude of this elect)g(jsup kh 5f)k 45cc6voq9jzric field?

  A particle with a charge27 txvjpmsvq +r(z+ t4e:do1c .yt:o d of 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 an ex +bck:(f6 10jvdwj gklectric field of 6000 N/C pointing +(1: xfgvd w0kj6c jkbdownward. What charge must 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 ij3p ,;tz 3tmci x6f fpizt45l+nside a uniform electric field, and is suspended agz il6 3,cpift pz 35tm4txj+;fainst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charg lroj 0 rqn2nbxwlw fu0 c;m(/,4szj+4e of +2.0 mC. What is the magnitude of the electric field 5.0 cm fnux4b4f(m l n+sqc rwl0rj2;w oj0,z /rom the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the electf hx+er1wzrso6:l/,*zzgr .r; -nsqw ric field 6.0 cm fr:;xqrl rge1z-s.+ z*nz hr6w /r,wsfoom the center of the sphere?