State the law of conservation of electric chargn3 mepkeahg*0m c)o3, neqm9,e.

  Is it possible for two negatiz8. scz g(vxas3n 2nqnz kv8*:ve charges to attract each other?

  Is it possible for a positive and a negatiu+ pxoded th5-dwxtw dy*1rp-6 :5/yr ve charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod y. wevv7+ cf*cacquires a positive charge and the s y.wccev 7*v+filk

  A proton carries a

  The model of the atom shows r*o j 3q7um/dw.xq0vu a

  A neutral atom always obag4v e/.ed- ehe +a1has

  An atom has more electrons than protons. The atom ishtwbntx.3s1v)f km+ 8

  Materials in which the electrons are bound very tightly to the nucq1 9kaddnc./t lei are referred to 1/tqnd.d9c kaas

  Materials in which the elecioff:91iyyn tbp a8 +1trons are bound very loosely to the nuclei and can move about freely within the mateit1 byif8a9 pf+: o1nyrial are referred to as

  A negatively charged rod is brought near one end of an uncharged o r02j3nmmtfn76d0 8d(im c himetal bar. The end of the metal bar farthest from the m0h3omjd8 (m0ti26 7rcfd n incharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Theyfyv5/u 7(r)9qcm99rv y fxqyw are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is y rw9vy/y7q5(rvx) q9ucf mf9correct?

  How can a negatively charged rod charge an elecmpbk 4(.pj7vdtroscope positively?

  An originally neutral electroscope is briefly touched with a positively charge 5srnvnd4z-a+0( g zmxd glass rod.4(z mn+0 5-zvga rxsdn The electroscope

  An originally neutral electroscope is grounded tglnrs 772tq +briefly while a positively charged glass rod is held near it. Ag q+l2r7t 7tsnfter the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and+ mbu7j36z , oayuvwh, the leaves separate. Then a negative object is brought nearw67u+3 uvz, ohj ,ybma the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutra muni5* j(cga;l metaciu;mj n5( *gallic 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 Coulogn v(*-*h c7u3yoprer mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first char .ns1ismh7k p:0vid keb4, 3nzge is larger in magnitude than tm bdi,0p 3e.kszkni s 417h:nvhe second charge.

  Sphere A carries a net charge and sphere B ufzhsn6lj fcf-l)*-r *6lv, l.j0ge r is neutral. They are placed near each other on an insulated table. Which statement best describes the eles-.rv*l* fl,fjngel6) r u- jfczlh60 ctrostatic force between them?

  Two charged objects attract each otherwcs9 24bxtfm5q2es y 3 with a certain force. If the charges on both objects are doubled with no change iwmb 2cx29e4t5f qyss 3n separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces of lu /k 3d;w9a(uj820zvq byt7hal uz-x F on each other. If the charges are separated by a distance of d7bqualkd2xtu j90a ;( y vuz8z/ w3l-h/3, what are the new mutual forces?

  Two charged objects attract each otherzbjm2d83ong +m 6s)+ yys06pqk)ycaq with 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 nowc nd6aosk 2)s+qy 8ym0g q)py m+z6bj3 equal to

  An electron and a proton are separated by a distance o; x4jgf pi)kv ;jtb12gf 1.0 m. What happens to the mp ;gt;)f 12kbgjxi v4jagnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are se 198a2 cpkcionparated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the proton?8i 2cpa91 ocnk

  An electron and a proton are separated by a dist6pzhs 5o j(f*fance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the proton(6zff j5*sop h?

  A point charge of +Q is placed at the center of a square. When a secon a .ac-c2pzv2)li3:hg;etdh rd 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 t 2ag.z3lv2cp iahetrcd );:-hhe positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of a 5e 7w7pc0u. z unqmj*u*pgvc;n 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 a 0ncmp *cq zuv.7*pewg5j;uu7 cts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following 98 -7qtscih:ydx nwk6is not a vector?

  At twice the distance from a point charge, the strength o o*i3v. ubhe8sf the electric field

  Is it possible to have a zero electric field value between a nvdpgs9m8e8qa;bmr 4 ) egative and positive charge along the line joebgq49p; ra)8m8 vmdsining the two charges?

  Is it possible to have a zero electric field value between 85l v3 bl k6vin.qna9 xx,mo1etwo positive charges a. aekl bnxnxv3q,98 51 iolm6vlong the line joining the two charges?

  Electric field lines near e05upp c/kdx /psitive point charges

  The electric field shooj 9zt s6wfes4((u re3wn

  Can electric field lines inte o8thuu)tn75*ll .e.f ndi* rdrsect in free space?

  A solid block of metal in electrostatic equilibrium is placed inh(s(faf e3 oz1 a uniform electric field. sf(o3(zefah1 Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metkk(zlafne/:,ret k+) al sphere of equal diameters are each given the same tnkkef(:/e zk+lar,) 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 region where q4o*4xy4ngz- o:b+ hbis,m eka uniform electric fielz:h bx 4*o y,ik+o44nsmg-q bed is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium fetz-a9 c 3x9oshb0xu e9x; i3near an electric charge

  A positive point charge is enclosed in a hi3 hh+ u5s+ 1grvu4edsollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above thhergvs +s h3+uui 154de hollow sphere has

State three properties of conductosn t x14d;c2)rem/gb grs in static equilibrium.

State Gauss's law.

  The charge carried by one electr3qk +h1 kk fvqo/o9t;)t f9tzron 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 hamd5 u(jq(j6o0,w sd+ ujuc3ogs a net charge of +2.00 mC. How many more protons than electrons does this piece of g (djqcms0jow5(dj,uu 6u3o +plastic have?

  What is the charge on 1 kg of po -nb5b/gyalp :qnkdm)l-6 ;qrotons?

  An atomic nucleus has a charge ofnru7l fna4pma; 3s 52d $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separt ( k0n qs-m 1vjk3kr( w:2x+9bkvmmenated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the elect+k 1q: -m(kmmv 9tb02wvrn jsnexk( 3kric force between them?

  A 1.0-C charge is 15 m from a: tlx7v*u.6slxh k8e tnwu .9w second charge, and the force between them is 1.0 N. Wha76:9 *et.wnv 8llx. hkus xtwut is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0/-s,s 78b axozky6 gqg N. How far apart are they?

  The force between a d-bbhb9 2phs 0$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi9:( 49eodgtrs h0buq. bp*fnspop u u0;2uee,ence a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the9o*( u; sub,rqoues20pu. f t0gbh4nedp:9ep electric force between them?

  Three identical point y u92q)k*nhyy3h4ezjw + .wyh,m an5 wcharges 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 mark. What are the mawyy h54*9m hz,ek.jy a)+3wnw yu2hqngnitude 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 placed av/n6rs;t j3 xres7 3ny ltx2o/b0)qklt 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 whicns q63t so3ltrv7jyb0/)l;/kr2enxx h acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 yg4yg6w9; *qkjy, hgmmC at x = 1.00 m; Q2 = 3.00 mC; k9hygj,g6gqy y wm*4 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 square, and a second point c ;zved4i0 q+rpharge 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 char 0v ie+zrp;q4dge 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 x9g1,m wwc- 3xrito9dat (0, 0.10 m); Q3 = 5.0 nC is at (0, 0crt,dx9w1w 9 x- 3goim). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0yh8 )ym/h5 kxh0gsqt o8pp;/n nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction o 0g)sn/5mxhh; ypytkohq8/8 pf the net force on the 5.0 nC charge?

  Three identical charges of 3.b9qnzm77gw ;; d mo 3l0ln,hccy 7tce50 mC are placed at the vertices of an equilateral triangle which measures 30 cm onqylz,c; wc ;n77nh l b9t5m37om0dcge 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 se; 2xv.o nje9ntdr ek np*e9*5tparated by 3.0 m. At what point, on a line between thertn9k dt;e.e nvo*xnj5 pe92* 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 ahemefnt;v,i 1n-uv;s 3,n .jx +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third chaxv f, ;i-e,vhue3s;m.tjn1 nnrge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x =bf+ft p*tgnlluq11h*/.j nh2 c*sg d3 2a. Where can a third positive charcnhftg+bustl1**g. 3plf2jq1d n /h* ge +q be placed so that the force on it is zero?

  A copper penny has a mass ofoma x5s 4ixx0 :q1cc1v 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 the force of kn dl/tm 3+hqv0klq*,gravity by the attraction of a fixed proton some distance abov3/k0*m +v hltdknl,q qe it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thlj7grdhy::cjp6 bkw (1 g*le(reads which are 30 cm long. Both are given identil:l kc*w7p:d 6(ghjjer gy b(1cal 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 elect/ 1go.phm4fibg,kg8y ,zfp*a:aw qj,ric field at a dih,p foa,8m g/iwa* k ,byg.q4:jfzp1 gstance of 1.0 m from the nucleus?

  What are the magnitude and directionf 5vu9/ vdt2ne rux,iz vet1 rd5)0t0d of the electric field at a distance of 1.50 m frv1 0u 5rtnf2)vtiu50td e/v, re dxzd9om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of theme6 6rcyjej6 6 electric field at thmj rjcy 666e6ee location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the ukal- d-umpbdm2o..h4s0z n a4.rc 2)2ogmuwdirection of the electr.k4cu2ua.s um 4z 2gbpdnh2.m)o 0m wdoar -l-ic field?

  A 5.0-C charge is 10 m from a small testt ub n8u+9i*w u:rx(k5,mr4a yyt(rn b charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at tnbrt9rity8 (wuux4 nua, k5*r ( y+:bmhe location of the test charge?

  Two point charges each have a vt3 tmm.) -fnpwalue of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between th p.mwt)tnfm3-e two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and zk120ps8i bm uw :67qyc9 ewsa itp)g7a -4.0 mC charge is placed sib: q2i7 1g)epws6 cm 97p0 zu8wkytaat the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed a pgb(m+axw(d rnx5x5q 2eqm46 t the 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 two charges xe(xq5n a6m 4+b(q5 rxdwg2pmis the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 mr(:vzdp3f mwoot1 c,+ . What is the magnitude of the electric field at the point midway between t1(r twdofm3: + pz,ocvhem?

  Three 3.0 mC charges -en k)kt)dgfs fb rj38r-6 ;zmare at the three 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 th)gms8 )zk- 3nfjt b;d-f6rrk ee center of the square.

  Consider a square which is 1.0 m on a side. Charges are 5fyed omvnr +c/r47h,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 elv5 en,fc/7r dmy4rho+ectric field at the square's center?

  A force of 10 N acts on a ch( yx4:c1b rni.r1k sv2bj q7 i07dz.dcyfwf/targe of 5.0 mC when it is placed in a uniform electric field. 4jq rfv:fi1w7b/ 1r yxny 0 . zbtki.sddc(27c What is the magnitude of this electric field?

  A particle with a charge b3 uwz.ahx) ;fh-jx l+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 4ki s431 k0mmx p;srrtw8 ido/g is placed in an electric field of 6000 N/C pointing downward. What charge ;0o4mxp814wr3m krd ksi/i tsmust 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. Th +,kptui(rb2wce o/2j e ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction ofw/ r+o(i p bekc22t,uj the electric field?

  A metal sphere of radim.gnk ve54 x-tus 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphereg k vx5.t-4mne's surface?

  A metal sphere of radius 2.01sm 1d mw)n/gv cm carries a charge of 3.0 mC. What is the electric field 6.0 cm wsdm)ng1v1 /mfrom the center of the sphere?