State the law of conservation of electric chajhnv9y exq:do:r md xw9)(8c)rge.

  Is it possible for two negative chai1,n/y ;rrviznj,msge +s.d.g *fc f )rges to attract each other?

  Is it possible for a positive and a ru6 7 jyf bo+hrk.vk l8 iafed7/u9*w8be)-rpnegative charge to attract each other?

  A glass rod is rubbed with a we87xn js h5(. lq1ntgpiece of silk. During the process the glass rod acquires a positive charge a s(n.x 7jlw1t5n g8qhend the silk

  A proton carries a

  The model of the atom sho.pwud dz/r/mmtc5 27c;sf nf)c.*mqy ws a

  A neutral atom always u:5p.z90bxl:ri e bnphas

  An atom has more electrons than proto7qxvvdk.zm+7s 88nzh ns. The atom is

  Materials in which the electrons are bound very tigh m/5ov6fej7n 1dh,auf,top) g tly to the nuclei are referre/t6gh,,foj)nafm ovp1 d eu5 7d to as

  Materials in which the electrons are bound very loosmxx +jp 7t0)copgr2 2zely to the nuclei and can move about freely within the mat72+r tx o0p)mx2 zpgjcerial are referred to as

  A negatively charged rod is brou;mez+h a* bp5hght near one end of an uncharged metal bar. The end of the metal bar farthe h5mehz+p;b*a st from the charged rod will be charged

  Sphere A carries a net posi80y 9wj0kno yitive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire thatkyj09o8 inw0y is grounded. Which statement is correct?

  How can a negatively charged rod 21sh 0enjmvr;g)ioj0charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivhl. a0ii :iqygy4wk.vl (k6 +cely charged glass rod. The electr :(.4i 60cw.kkqav ygll +hiiyoscope

  An originally neutral electroscope i0c e f0ut-v qs b :puw3e 7w7n:f/bd,bre.:kscs grounded briefly while a positively charged glass rod is held near it. After the:3wnd svwebu -b 0c ,kbs7fp.7fu/c:te0 qr :e glass rod is removed, the electroscope

  A positive object touches a neutral elecn7y9qctbf,fhj w4ad;n :9,ljp g5( evtroscope, and the leaves separate. Then a negative 5,n,9b;vl yeqnf cgw:jpjta d9h74( f object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatgcao,+91r4(h sip( zn* cgssced 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 doa,ho9s*zsggrc(4sn ic 1p ( +ces either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constantdnp:29s/c tmfn dp.8i $k$, which appears in Coulomb's law?

  Two charged objects arez r (qiu3wmj4dzt.0fr kj )a-3 separated by a distance d. The first charge is larger in magniti3zjd)ua rtf0m 3 4.zj r(kq-wude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placebz8u12fp-v4t l 6ay zg/dpie-d near each other on an insulated table. Which statement best describes thepe f idtp8l-1b-y/4g6az zuv2 electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges0:6 ndcnmk q,n on both o,qd0:c 6k mnnnbjects are doubled with no change in separation, the force between them

  Two charges are separated by a ) fje. vi -m3dzr9gs7gdistance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forcesg m7 r9zeg3j)f-.is vd?

  Two charged objects attract each other with a force F. What happens to the f3usp7 iq9bexkq4) uz+orce 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? Tqke4x+)bsqpz7uu9 i3 he force is now equal to

  An electron and a proton are separate-hnz,orxq*k 6 bff.x) d by a distance of 1.0 m. What happens to the *xhqf b6, rokz-x. fn)magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are s tlm10q5c((keq*ffvjgf h 7)u eparated by a distance of 1.0 m. What happens to the magnitude of the force on the j uv 0t7(kqq (5mfe1)*f cfhglfirst electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens twxp, jfy f3* esxk225t -sso2k ywdy(*o the size of the force on the proton if the electron is moved 0.50 m closer to the protonxy (,d5po2f-2 t*23ysyks sxw e kwfj*?

  A point charge of +Q is placed at the center of a square.oq,,ka gqwqn6qxz95h+x4 .i h When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic forckzwo.xq +,n iqaq ,hx6 hgq945e 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 cengd+e 7 (dzpbpxujv5 7n7w*yz7troid of an equilateral triangle. When a second charge of +Q is placed at one of thj+x7pb7e(zg7p75udd *vwn yze 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 njx5 t4rr) *cipd (pb.ic.f8. dteig4whc o90rot a vector?

  At twice the distance from a point charge, the strengtq3,ben7 ad7)w0wtyp .yy)gb gh of the electric field

  Is it possible to have a zero electric field value between a nexz ;lrd72srfo c-gkzd8y -7g; gative and positive charge along the line joining the twoyl; 2;co7r dgzdxkgf-7z-8sr charges?

  Is it possible to have a zero elpn(ii5 g6ex- y1 :bkwlectric field value between two positive charges along the lineywpi6 1-(i5lbn gxek: joining the two charges?

  Electric field lines near psitive point chary1tai fjt *-vdo tz*muz55+/ mges

  The electric field shown.d 7/2: jsr73ci 9s rsrjrwtobx3m )fb

  Can electric field lines intersect in free spapua(dfsvxy1u3b8/6zgg. t) 5 z m .chkce?

  A solid block of metal in electrostatic equilibrium is placed 2 wvq4kpx4 c0iin a uniform electric field. Give a statement concerning the electri2qwck0 x4vip 4c field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each ggfsg0 e*scli r 4ixxi15vb/1we*-xn; iven the same charge, the electric fisfg -re1w1ln0i 4s*xv5cgex x;b/ *iield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where ubp,g0.uld-dvp z 9metb1+)ba uniform elecl,p.)mv1gb0ub de -pu tz9bd+tric 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 :z;aw4qpv:l5t v6zcz7 r *tqnelectric charge

  A positive point charge is enclosed in a hollow metallic sp5;pp;dlds 34kf r(*e l zlg(kphere that is grounded. As compared to the case witho d5(spl(*f;plz;rp3kgl e 4 kdut the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of:dxzhm9cce o* ;8nposxx1 :z. conductors in static equilibrium.

State Gauss's law.

  The charge carried by di e9diw8.:,ix uk5j8qd *g(ly avip1 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 +2.00 mC. How many more prorey 66p:+qnl jpkez6tze). 8ntons than electrons does this piece ofrlekqe.z 8 y6n)jt p: 6+e6znp plastic have?

  What is the charge on 1 kg of protonmce-y).n:+tlen r5tlhv 4-pa s?

  An atomic nucleus has a ctf.wc 0qew3w9b 1plq+e pe(8tharge 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 charge vajr4oi.y4 0xu(lsn t 3jlues of 2.0 and -4.0 mC, respect3s4y. j4 rnluji0ot(xively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from yr/w(9 7atv0a wfpxi 3a second charge, and the force between them is 1.0 N. What is a(7v9xr 3/ 0afytiwwp the magnitude of the second charge?

  Two 1.0-C charges have a force between t ds5;fspq: m1x m;rogj8.4 cxmhem of 1.0 N. How far apart are they?

  The force between a cw8eksr, /6 ur$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi4 lpzdtbii2: 3ence a 1.0-N force. If they are moved to a new separation of 8.0 cm, what isbdl t:2 i43izp the electric force between them?

  Three identical point charges of 2.0 mC are placed on.53 ym f3axpd(e7 ++ mnaibobwplk or .60/tqq the x-axis. The first charge is at the or7 fkqopry0 iqb6bxn 3m3+p/+d m5o.a (lae. twigin, 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 on the x-axis. A charge of +2.0 mC is place vbj7 zon4hol11. kbdd xk :7+mznx3.xd 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 magnituzk7kob1xb xdnz+ lnx3d 74h1mvjo ..:de and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x =n5;v qbzky 7d9 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 forcv ykb95nz7dq;e on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a secondk;r/yt:4) x xfi wk0tk 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 yx f/4r)xkt k0 wkit;: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); Q3w,fuwtad;0rj4rs*fz4.g9 bgs, p m; f = 5.0 nC is at (0, 0). What is the magnit; 4wfgr j*sfp04.btz; ,swagd,fr9muude 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,r7+bot g3b9 xf 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC char3xr7btfog+9 bge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral 7v/+sd:- eiu jdi4gas triangle wh7 +d/u4asgiv-i de :sjich measures 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, whicho iuae:o;2vsy o -:h7k are separated by 3.0 m. At what point, uho:sok; vieay-7o2: 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 charge is at p86g4zi)tf z-dfks7a d:5ant x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it- g zz7i486f tad5:n) pfdskat is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.iix wif; ,2 -*nusrbi) Where can a third positive charge +q be placed so that r-b,win 2 )xi;u*s iifthe force on it is zero?

  A copper penny has a mass of 3.0 g. A total ze d:bqry *jsqj 1.1r3of $4.0 \times 10^{12} \; electrons$ 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 againstrhtutxz lpm6ozr;28ef)*, m7 the force of gravity by the attraction of a fixed proton some distance abovermz r8z*o6f;x2 h7tle mutp,) it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconds;6hf31g rtxez+7a zoucting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is h se73rz6a+zt ; 1ofgx$20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is t28 meheb2q* uphe magnitude of the electric field at a distance of 1.0 m from the nuclepu8e 2q*e2 hbmus?

  What are the magnitude and direction of the electric field a+ ss/ 7mhx 7c--3uznqv/znf gqt a distance of 1.50 m from a / g3x-zvmqnn- 7ufq7 cssh/z+ 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chah(xog2v2,z zn 2a )xqurge. What is the magnitude of the electric field at the location vnx, zh)z2xogq2(u2 a of the test charge?

  A 5.0-C charge is 10 m from a small t wvp,)y iy(u9u./dzyi)rp: izest charge. What is the direction of the elez)v:u 9 z pripdi.uyy,)wi/(yctric field?

  A 5.0-C charge is 10 m from w0o y*cy zmy-*a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thyc0*-wy*moz ye test charge?

  Two point charges ea 5 u1 f3+h8rlr5ysfne8pv2xu qch have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the r1r+n5 uxh 58 su8fpflv 2eq3ytwo charges?

  A 5.0-mC charge is placed at ts;st2dlk*,peu.ex q l54+ dzohe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 ez 2q. d;e skdxlo4l5tsp+u*,cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC:hywrlp 596 on 6y:wcv charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electc:rnh6 5owy 9l:vw yp6ric field zero?

  Two point charges of +3.0 mC and -7.0 mCoz.b91l92k/a y)la f+v su4heyv r t4k are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway be )fu/v1kt.k eyz+ 4ohlvlrb y92a4a9 stween them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Thek/: ij frvgvx;7*pgl/ 7pq cns 3)fvy1i4ftj: last corner is occupied by a -3.0 mC charge. Finq ) ffjt3/g4v1nki;l::/g x cpivps 77 vrjf*yd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the coh* ,fvuet4he)8s q04gdal 4herners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3.0a*s4 uhe4f ,h )d l08tvgehq4e 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 charwc46zy45 *uylb k+zwvnto/,p ge of 5.0 mC when it is placed in a uniform electric field. Whatk n,z5 to4wz/ywv6+ *cb4puly is the magnitude of this electric field?

  A particle with a charge of 4.0 /oed3c,ki k 5 il7-rglam21vtmC 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 electric fieldwd8z/a * d+6up oqxqar t4+m.y of 6000 N/C pointino awz dadmr*uxq 8y/.qt 6+4p+g downward. 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 inimar::9wl-w/+u gu s yside a uniform electric field, and is suspauy:ulr9w -ismg + /:wended 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 lz6mb4/w xma;/8wxs kis the magnitude of the electric field 5.0 cm from the sphe;mz x 6w/wmla sb4k/x8re's surface?

  A metal sphere of radius 2.0 cm carries a charao7y k :v)+rbdmx4:qlge of 3.0 mC. What is the electric field 6.0 cm from the center:q+4 x7omdvl)ar: kb y of the sphere?