State the law of conservation of electric char wl0( kdi36vxyge.

  Is it possible for two negativk5)j4m0y8/: qroxzvywom(f wqu7;qpe charges to attract each other?

  Is it possible for a positive and a negative charge to attract epbnpkh+ z),hk )e*ix*ach other?

  A glass rod is rubbedsuaf g/0 kvh*)bq*: 0 wrhwuo: with a piece of silk. During the process the glass rod acquires a posit:0rh/ :0*hsg qboufuvw)*awk ive charge and the silk

  A proton carries a

  The model of the atom shows /3qip+gdndx5a

  A neutral atom alwaywa 3,l5xaw+ggn 6zn w(s has

  An atom has more elec5 lu n+jyo he9ef.b0,htrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are re*1t*g gmc4.vt3qh;g7pfs az7w fe 8hl ferred tz hmf *1.sq4 ; hf77te*pwvgta3ggcl8o as

  Materials in which the electrons are bound very loosz.ceox +s6)wrw; y8jqely to the nuclei and can move abor8 swcoyjwzex.6) ;q+ ut freely within the material are referred to as

  A negatively charged rod is brought near one endgql8v-kb219r+e2vo f ck7zok of an uncharged metal bar. The end of the metal barvo 7+g19k zkl8b-cfe2 kvqor2 farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and spiw4 mjqnn1z +( bodp(.here B is neutral. They are placed near ea4zon1 d mqj(pb+(nw. ich other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively t-m9 pdq :*,mxf 8lraxcharged rod charge an electroscope positively?

  An originally neutral electr2kyc0;pv2-p* fv 31ynji) ha8a wychposcope is briefly touched with a positively charged glass an;yy2c 3pv0hh8c-i yvap kw2*) fp j1rod. The electroscope

  An originally neutral electroscope is grounded , vmjsy z.d*7) vs-riobriefly while a positively charged glass rod is held near it. After the glassd. vs-,z7s*ry) ojivm rod is removed, the electroscope

  A positive object touches a neutral electropv+du+c *o4xt,tgb 2s scope, and the leaves separate. Then a negative object 2cgt,udts+o p*vb x4+ is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatedbly/s;zp n/+u u5vc o: table. A neutral metallic ball rolls straight toward the ou:o +n/v5py c /zbslu;bject, 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 con+.sfr.)t imwbsl( yv1stant $k$, which appears in Coulomb's law?

  Two charged objects are separatet,3 +;ibjftzgrv4s0 miud vp7 (w 44mad by a distance d. The first charge is larger in magnitude0vmw,(v;miftsd4+b3ut iaz 7jpr44 g than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are g; l4tcxanp*7;kgjxr*3 6c uwplaced near each other on an insulater7 p lnkcgu*x3 6gt*4;;jac wxd table. Which statement best describes the electrostatic force between them?

  Two charged objects attract eachm.0/ doa4 8oeca rk9;xnh;re q other with a certain force. If the charges on both objects are doubled with no change in separation, the foc ;m9rkhd.o eo e48aa0 n;qx/rrce between them

  Two charges are separate9t1n,xs p mtkjdb,t(8 (i)dq zd by a distance d and exert mutual attractive forces of F on each other.ib kdxtm p)18nd,s,tq9( (jzt If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eacyf(h vrwnds,zcy ws 50 djyn1 2*hwn-l9;i4.ih other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the sejsn-.24i(c;w 0nfhlhrsny, ww19 d* 5iy zdvyparation distance between their centers 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 happen.yb z 2vq:iftg+ ,oaa t*8(xkas to the magnitude of the force on qfx*.ito gyatv (k8z b:a,2+ athe 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 happen.yzle s0by)l9s to the magnitude of the force on the first electron if a second electronyzeb0 ll .y)s9 is placed next to the proton?

  An electron and a proton are sepaj ) pf1s3tyc1crated by a distance of 1.0 m. What happens to the size of the cs3ytj1fc 1 p)force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q b+1.7lf(m8dspzr/w s zlxi,sis placed at the center of a square. When a second point charpslw7xs8br( z/f ismz.,+l1 dge 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 square?

  A point charge of +Q is placed at the centroid of an equilateral trij of* 2hw8dzw0angle. 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 actj2hzd0*w f 8wos on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is( n/ nuoosfr/* not a vector?

  At twice the distance from a point charge, the stw+c-sn 6)q qs2 fomnx1rength of the electric field

  Is it possible to have a zero elec3h,ki3wr*- 5sq0kdt y td w4motric field value between a negative and positive charge along the line joining the two c w*3yo d3qtitkk-s4mh dw,r 05harges?

  Is it possible to hae+v i79 uzr;k+q;r tdxve a zero electric field value between two positive charges along v9ri z +;;ekq+ur7dtx the line joining the two charges?

  Electric field lines near psv94w x4 i78h2qwcqyw mitive point charges

  The electric field sm.m)yd. koh -bhown

  Can electric field lines intersen,zi ;hdtocr4m:oxn -)/ 8pk ect in free space?

  A solid block of metal in electro /jnje6m*/nd9 cal/hl;ur5sostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block'jrsujl;oa5/ e ml6hcn9n /d/*s interior.

  If a solid metal sphere and a hollow metal sphere of equaw af*f:y w0b+ol diameters are each given the same charge, the ele yaf+:wo0w *fbctric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unx+d 2- dc+jxg,qepf9)ex+kfg iform elect, ++ ge pxxcd-fxk)eq+djf92gric 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 electr2gelvid) e2o2smgkh 1v ( o;;sic charge

  A positive point charsb c33)o.pxa0k(vrh ege is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field3b ev0osh(3ax )crk p. at a point directly above the hollow sphere has

State three properties of conductors in static equil*axxs9fa *- 7oazti/ librium.

State Gauss's law.

  The charge carried by one qx4yyqu- y8bu(17 flkelectron 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 protons than p2h.;8 ugri ep:k0y hpelectrons dy: kp0hu i; ph2re.p8goes this piece of plastic have?

  What is the charge on 1 k;gvu ed/ . tfsaodi.(l0eo0w*g of protons?

  An atomic nucleus has a char .s k7ruq,gkd3ge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by.d2 p vbv 4+apq*sx1ag 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between t1s v pa*2p+ aqxbgd.4vhem?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1 9u2x7,wu1zq 7: lelep2goi l,qiqr y9.0 N. What is the magnitude of the se,uiq 9egl ,ylz2wexu q:72i9p1lor7 qcond charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are thy 3u l7v 7pmmnf1ta-1cey?

  The force between a mxpx-dl7tbs-y-yd. w ;s +pi,$30 \; mC$ 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 forct61-usgjk- the. If they are moved to a new separation of 8.0 cmsg6uh1t kj--t , what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the xc:w5w9u; put g-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 mawp9uctu; 5g :wgnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the iy8 i3lk8rb)7 fuppkk36g*nn x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cinbukyr*3n8 )8i6kpgkfpl 37m, 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 are located at the following positions: Q1 = 2 x )bi:j9lbqp7tc jieks67)0 d.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 magn9xjiei7bt : bc)kd6jlsq )p07itude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center 1qafxu6+) i*j 6ije wiplv7s.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 pfsevpuq 6l6i*a . )wji1i+x j7ositive 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 (0u rw2zh7hee 7:gh9pg+, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magni7h9pwge+:2ruhg 7 h eztude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, -(kppwjn-j*v 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the(-pwnkj- j* vp direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are z)d19q3w hfi:vw i 1rse4o/ifplaced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force w4 w/i3fr z1sq oh vi9:fwdie1)hich acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At w pczh34fxj8ayox4p5 ;g 3g5an hat point, on a line between the two charges, would it be possible to place a charge of -Q such that the elec5 ;8hp 5gpfnjz3axc 44oxyg3atrostatic force acting on it would be zero?

  A +3.0-C charge is at the l-qi 18pjveu5origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third c i8 -veqjpu1l5harge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x y 4c2kse:yuockpud:f -6 ;t.x= 2a. Where can a third positive charge +q be placed so that the force on it is zd :uuxpce;y2 4 sck- .kyof6t:ero?

  A copper penny has a mass of 3.0 g. xhnn4ra2gcxe 0g-c39m z.,g 7hk q j(oA 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 the force of gravity + l+b eqb kqfyw/g9llm,lw7mf f.7)s ,by the attraction of a fixed proton some d.qfb7l)flq e ybl +, w ms7f,lm9/kw+gistance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductinqf+* otr9 v.cn+cd+kp g threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betwetcn * dp+qr.o+cvk+f9en the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e.-j5r iu :e+t1jluhl 0l What is the magnitude of the electric field at a distance of 1.0 m from the nu 0t lilh5j-le:+ju1 rucleus?

  What are the magnitude and direction of the elpb5ax h3q fgqv v6a6zrpy)5(5ectric field at a distance of 1.50 m from a )b5f yrv(5a3gqpz ap6x 56hv q50.0-nC charge?

  A 5.0-C charge is 10 m from a small test chauwq *ua0g:lx zj;1 ah)rge. What is the magnitude of the electric field at tu 1awj zuqg;ha*):x l0he location of the test charge?

  A 5.0-C charge is 10 m from a small testtiw o9-; 0;re yjhtp0h charge. What is the direction of the electric fier0;w0;o iht9ph-j eyt ld?

  A 5.0-C charge is 10 m from a s1l2ty4nwrvfj) awfl/u7hm4xkh;x 9i 0yeu 3-mall test charge. What is the magnitude of the force y9jwt mf 4 f1lhi3-ux47hkwvrx;ae20y/l) nu experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a vwv4*a7q 7ri zcfl79 qsalue 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 4q7z vcwlf*aqsi77r 9 two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter st)tac0)f,k:k 5kxayc bick and a -4.0 mC charge is placed at the 50 cm mark. What is the electricba,)0ctkca: x k)fyk 5 field at the 30 cm mark?

  A 5.0-mC charge is placed at the ml8(dixrznyj .weip2 * ds8mg 4k;v:-0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the twzkjvnmyg28rl.4i*w:m ;dd 8ei xp(s -o charges is the electric field zero?

  Two point charges of +3.0 mC anw 3 9j08y1b3sggfgishnf/r3ud -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magni f in0wg3ub3gsf gj1s 98h3/rytude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the thlo1p ink/6m8x nzxq: ,ree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the centerl 8xk:x/mqzpnoi n,61 of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corema (ni9g2ctn,n6or 7 ners 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). 2 n9(giennat, rcm67oWhat 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 pb u(bcsu;g *m )i8f)a;wfg0x placed in a uniform electric field. What is thw)c)*ib;ab8 s mug x0(uf;g pfe magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of ta4*n4 6zrzbs38m(mwo7 eqgj6wirn-bloe0 4$5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed in ct:n1bt:2862kl8pabq 2 f(yrqj j i goan electric field of 6000 N/C pointing downward. What charge must be placed on the ball for pb j2bcrgyl2a6fo(8 21 k8t:jn qtq :iit to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. vg( l4l3o6njnm s43du The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnituluol4jgm3sv6 n 34( dnde and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Whli x:gw.:mcj8 3ccjg8 at is the magnitude of the electric field 5.0 cm from m c cjj.3g:c:l wix88gthe sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elect7-bswta i3q2 w 1dcoc()wf,wyric field 6.0 cm from the center of the sphertd3awq ofcw7w,(b- i2)w 1ys ce?