State the law of conserhk ly5as))) /bmqd zb6vation of electric charge.

  Is it possible for tx;p: 3oln:tj lsi*1ybwo negative charges to attract each other?

  Is it possible for a positive and a negative charger,jy p h ,2x2+u ir*mf9tix7gj to attract each other?

  A glass rod is rubbed with a piece of silk. During the procxi11(9 ddv-z32b uc bihlmz9.ad +xkuess the glass rod acquires a positive chargei c1z.x( 93ihlk2zd 9bvu-+ dxmda1ub and the silk

  A proton carries a

  The model of the atom shows ai0y dglu0n(u )

  A neutral atom alwayzth vz/.mks)rp+a )j 3s has

  An atom has more electrons thsle3 3: mhfkc;an protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refh 2c8b2 z*dbou;ea((m1hkn6/oc v fkgerrek 2z6c(2e(hb kd chnba/uf v;o*8m go1d to as

  Materials in which the electrons are bound very loosely to a4fli9x:tpg 6a55 djtthe nuclei and can move about i6la9xa p4tgf5t j5d:freely within the material are referred to as

  A negatively charged rod is brought near one end of an 4wiqu,;f 8wi lrtto3l81dn/uuncharged metal bar. The end of the met1u/wrt ,4fow 8ll uqnd83;iti al bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B9r;93g.u (tuwtjr nn k is neutral. They are placed near each other on an insulated table. Sphere B is br(rnn 3twgr9jk; u9u. tiefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positiveb glx6)5ci v2rly?

  An originally neutral elect1j ,mp f w);en5:bxrzh: ddxu4roscope is briefly touched with a positively charged g;bnhrw5) pjume : 41dx,:fdxz lass rod. The electroscope

  An originally neutralyxf4hvj e b2.p1/yn3t electroscope is grounded briefly while a positively charged glass rod is held near it. After theyv1.j/xy2 bnt3h ep4f glass rod is removed, the electroscope

  A positive object touchekz6:9,geumm f s a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroskf,zm9g e:6mucope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placeq sgx7s2ey:2ek- ;nx bc /sx1qd 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 sx2xeqc; en7g1bsxy2:- /qk s 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 c30, ozfrg3x/qcvzo u9twul(f7r v/x6onstant $k$, which appears in Coulomb's law?

  Two charged objects are separaa mx qf,z j2ofh 9;7n1zp:x/bbted by a distance d. The first charge is larger in magnitude than the a;nf /o :fjx1bzmxph72zbq,9 second charge.

  Sphere A carries a net charge and sphere B is neutral. They are dar1f. snjy(t v4 z4to-+b8jeplaced near each other on an insulated table. Which statement best 84t4ot.ajj b+nyv1 -er(zf d sdescribes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges 0o6: fay2nk m53z nsveon both ob3ko0s:6vf n2ny a5zemjects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert m4 q2y7 vimw:sjutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual y 74:sviqm 2jwforces?

  Two charged objects attract each other with a force F. What happens to the forc y3amc;spq* +2fh;wdb e 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 originayq sbwc+;* 2m;f3dp hal value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happl.vsu0g +qw uu46u2lbens to theuu4 w0suvubl +lq26.g magnitude of the force on the proton 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 hapoi0ce d)p*ifp)h ;d2 hf i9e)gpens to the magnituf ph;oe e)g)i cd)*2pihfdi09de of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are sep17*8wwa*yy / vasnh*;m i rytwarated by 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 clo7msy;nay/**rvwyh w 8i 1at*wser to the proton?

  A point charge of +Q is placeasmem2z (4 x5o12 q fei+s,rkad at the center of a 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 magnitude of the net electrostatic force acting on the positive charge at the center of the s2ao5ksf(i + zm sax14re,2mqequare?

  A point charge of +Q is placed4k5s1r3z e/vigbtl3z at the centroid of an equilateral triangle. When a second charge of +Q is p3zkv3 e5li 1tzbs gr4/laced 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 vertices?

  Which of the following is not a 8,dl5 c8bjkkp t8yxs/vector?

  At twice the distance from a point charge, the strength of the e1 08mrv k+rzehlectric field

  Is it possible to have a zero electric field value e(cd-q z5*f kjw +zb;ubetween a negative and positive charge along the line joi+d;ce5 bzuw *z-f(kq jning the two charges?

  Is it possible to have a zero electric field value between two positive chargeszq:g6 jd-ile k/w/s1ey./ dcb along the line joining /6j-d: dlegy qz/i 1./bswkecthe two charges?

  Electric field lines near psitive poi;grla55 5 , mztsbaro1nt charges

  The electric field shown2wqn -1e1q2*gycnklb

  Can electric field lines intersect in free spaceoy sw jz;kkan7)1 9g y:w,mlh.?

  A solid block of metal in electrostatic equilibrium is placed in a uniform ele8dlmvwh -h a,+;/fpdcctric f 8mv;ahcwdfdp,/-+lh ield. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal 2 ei7rse.( uto7 alna7diameters are each given thene2rt( s7l.eaai 7uo 7 same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a reao+ jgo)k/(gkj 2(wqjgion where a uniform electric field is direct wjk k)/(o2+ q(jogagjed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriuxibk87vv s5 *1x6hzjtm near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere twc 4zvuj+l v54hat is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the ho+4c5 vzu jvl4wllow sphere has

State three properties of conductors :z rgck5gty5 38(4c;qz boglvo 7 6ucmin static equilibrium.

State Gauss's law.

  The charge carried by one el6 ntu*a6b ssg*ectron 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 7l9f l32pbltx a net charge of +2.00 mC. How many more protons than electxlbl3 ptlf9 27rons does this piece of plastic have?

  What is the charge on 1 ktcqmw6t .-,o* xdwbr0g of protons?

  An atomic nucleus has a charge of0o+9wlg)w :hv8b heiw $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separas8x sd6kw9fd :ted by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What9:6d xd sskf8w is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betwe t/6;w.nwipuiodx ptw b(e*76en them is 1.0 N. What is the magnitude of the second cha xped;o w( *7ui6i.tbn6/tpw wrge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart areud5y,ep* p( fkpy+plsw-;t y6 bvsv/ ) they?

  The force between a dn qp8)1e81q4yizxub t x 86lc$30 \; mC$ 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 force5a6s m4c. y- ytit/ve6v ecstd47o 4ul. If they are moved to a new separation of 8.0 cm, set5- v/4e6tdy ccuso4 t.67a 4myi vlwhat is the electric force between them?

  Three identical point charges of 2.0 mC nf eg;t86umvqg l0e *.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 mark. What are the magnim.6gu0 ve8tg*l ;eqfntude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. 8/jgy.avy 5zc 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 th aczy.g8/v5j ye charge at the origin?

  Three point charges are locazvowugz 8 ucdzh4b ;xg371e+9p4 l ya9ted 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 mad1u9x o 8lgw94bp7+3zhc uav; 4gzyzegnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at thevbxcfj/+(tgz2 7s:f h-8 egxr center 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 cha :xrbh gg /ev-(c+s2 jtx8fzf7rge 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 abcz;76g2 hnuk t (0, 0). What is the magnitud gn2hc7kbzu6 ;e 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); Qf9*5:u fbofq/e us;kd 3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC fkqf b:fd*uo59u/; secharge?

  Three identical charges of 3.0 mC yths*3y s bgm44 i+5h*hu1bm .t;oknz are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the cht 3hmyt4h zko1ms5;gsbyub. *h*n+4i arges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At u2s4uf5* vqnik1x 1v twhat point, on a *skvu4tx1v21fui5q nline 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 / t dlfjiyeq+ )/m2ru1origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so th1m)qluj/itf/d+ e y r2e net force on it is zero?

  Charge +2q is placed at the origin and charrnzc gc v/+d 6--ri2qrge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero?/v+q-ng-2cdcr6i r zr

  A copper penny has a massnybmtczr-(,()c-pu l 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 aga0ij8nua .c7u w(x2j fbinst the force of gravity by the attraction of a fixed proton some distancei.w7(u u8b 0 xcjfjan2 above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threadsbxh fg.)5u y zw:;vrf3 which are 30 cm long. Both are given identical charges, and the ehfuf)3ygw zv.;5 :bxr lectrostatic 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 i5,q5 usfh,-swsq6c: qb6j pgzs the magnitude of the electric field at a distance of 1.065 fsp ,zc:5,qu -g 6bsjqqhsw m from the nucleus?

  What are the magnitude and direction of the electric field at a distancsc-16sl,byga h k1uw 8e of 1.50 m from a 50.0-nC cha68a uc11gkbs,-hlsw y rge?

  A 5.0-C charge is 10 m from a small test chargek /lbym pn9z2,. What is the magnitude of the ek9mb,yn /p z2llectric field at the location of the test charge?

  A 5.0-C charge is 10 6dyi5h4w i --7hcdetbm from a small test charge. What is the direction of the electric fdwbtc5y6-idi -e4h7h ield?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of22obxh ykp b 7t1j)i7g the force experienced by a 1.pb2b)7yjg k7o hit21 x0 nC charge placed at the location of the test charge?

  Two point charges each have a value ognj: i7 s(ofw8f 3.0 C and are separated by a distance of 4.0 m. What is the electrisw7:jg 8 fon(ic 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 aq4 ob.+pa a76/ 5eragmvph8n-edux6f 3 xl+mm -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30a5vfaexo ngxrm6+p 34.86m7 /bpdea qmuh-l+ cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a n()svhp7u )/l 5q odfhmeter stick and a -4.0 mC charge is placed at t l5upfq(ohv)/ sdn)7hhe 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 at x = 0 g e4pj ca(//ltand x = 0.20 m. What is the magnitude oflg / 4tc/eapj( the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of ai, pi *we.ynl*+0 dzrs square of side 0.50 m. The last0nwii* , .epy+*rdzsl corner is occupied by a -3.0 mC charge. Find 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 corneo6)sfqv 9f i5irs 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 (05sq6fi9 f) ivo, 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 uniform elecm d:ryk 8eo1k0muh)2wtric field. uykk :82hr1)m0m owdeWhat is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a masytkl9 q,qwu+rf3 c 1(a9z zd0y-9fzszs 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 ildplo7waz6 9fl ,7n*9gsmfl 3s placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the 7p93wl *alzlf,fgmlsd69no7 ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge o1k,ljy4l sq ,nf -2.00 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 elecj,nq4s,1k ll ytric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is th alcimfp7 0w1sk:/ede 9j66hge magnitude of the eledm6ae6 sfwj :i79eh0c1/ pl kgctric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm cayhif;r ray8j x6islw:-* qc, +rries a charge of 3.0 mC. What is the electric field 6.0 cm from the cen6 s:cj*rhw,y+f;xal r q-8yiiter of the sphere?