State the law of conservationy po,ma,9v n/)hh(jxr,wvr n3 of electric charge.

  Is it possible for twopi1kyip1 6;s m dwk 03m 5laqatgc)/s3 negative charges to attract each other?

  Is it possible for a positive and a nej1hcm + a(6apjgative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodv 2(e2txsou 2o acquires a positive charge and the si (eo2tvu22s xolk

  A proton carries a

  The model of the atom shows d3yx -c)tumtk)e 4+7xxff;j fa

  A neutral atom always ha*psp 5 ll8w6rrr69qyp s

  An atom has more electrons than prm8q2 z j;e )comwk+0anotons. The atom is

  Materials in which the egp8;j3xt 5xc(g9 r yfmlectrons are bound very tightly to the nuclei are referred to agj 5fm3rcytp9g8(x; xs

  Materials in which the electrons ardm);cgo5g3f . d0ayatjtc( v/ e bound very loosely to the nuclei and can move about freely within the materia)mccta.o vt 5; g df(/jgd3ay0l are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar.hsyi6t a6;(ze;7nsh u The end of the metal bar farthest fromu;he6n( azy;t7s h6is the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. g r58e 2t mdotkl5g:m+flq- c+They are placed near each other on an insulated table. Sphere B is briefd f5eg+:ql to k-m2c5r+lg tm8ly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positiybvoq4r9a8al-nxa 5us2 yt 0 ,vely?

  An originally neutral electroscope is briefly touched wit 8q6+d)/srrdwlq rho2 h a positively charged glass rod. Ther2 o rwdhs rq8/ql)d+6 electroscope

  An originally neutral electroscope is grounded briefly while a positively chargegosh4wrx-cz4 ab:- 1zk. ,cnbd glass rod is held kg 4zs o ahw:-cncr-,41zx.bbnear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope,tis.m:llbj *o;0(e qs and the leaves separate. Then a negative object is brought ;sem*(s: ll0.t ibqj onear the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chargedg- (w;nho)ga+y kq:y +d nobn6 object is placed 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 fi6yn da-) hoqbg;+nny+kw(g:o rst 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 constpr*j0(gc d,ccant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is largecm)az 5p1bang q dni969n s;/ly 9oc4ur in magnitude th)o1zc9dpn99 yml6an iubn5cs; q/4 gaan the second charge.

  Sphere A carries a net charge and8u-9 rn9 vtjnh sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force bet-89uhnj tvrn9ween them?

  Two charged objects attract each other with a certain force. If the ch;nwlsro8;o 4uarges on both objects are doubled with n;; sl84r wounoo change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive nu(4zrkq4o qomc oae d 4en5f1:v7,(d forces of F on each other. If the charges are separated by a dist d(de4q41ofnr,: 7(54mo kuvoqaeznc ance of d/3, what are the new mutual forces?

  Two charged objects attra far-:jjl/x ;sct each other 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 valu ;las/:r-jf xje? The force is now equal to

  An electron and a proton are separated by a di818gqko )2 wlbl0wii7iknnr k-5o tlg -hb*l8stance of 1.0 m. What happens to the mi18hl0rkl8 n g2llno)io-k i5*g8bwk q bw -t7agnitude 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 m.s(al0h aq hha7s:w:happens to the magnitude of the force on the first electron if a second electron is placed n(:aqw s a ms0lha.:hh7ext to the proton?

  An electron and a pros gvzij*ue+ qo62 y8dgj;0j+ nton are separated 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 closer to the poyj+v 26u0qej; njsdg8zig*+roton?

  A point charge of +Q is placed at the center of a square. When a sex 91 +)z.vpfqnrz*sr ccond 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+rx nq1*.pvc9r f z)zs 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 centroideu*q) z:s1i fd of an equilateral triangle. When a second charge of +Qd1q)iu e f*zs: 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 vertices?

  Which of the following is nhql7m5 gsavj45zwul.1 70 v zq.ik0 zhot a vector?

  At twice the distance from a point charge, the strength of the electricdmkz uw *zx 4o5+r;p6i field

  Is it possible to have a zero elu+wr hgy,;+:y()jhzvm2+gh p)va n:zah e0glectric field value between a negative and positiv;ahz vw:0 z gph+,hr+ yma+lg)gen)u(2hyj:ve charge along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive charge*:+iw 8m, ; 5eq1kmdmnwqfyves alonqmq: ;e+5w8*m,yvnf1wid mke g the line joining the two charges?

  Electric field lines near psitive point cha6i 3in.-ahb tcrges

  The electric field s cg,zm/+:v6e;dy-ut g d ym9a-t)dzywhown

  Can electric field lines intersect in f t9o)2l/8;s pt zr2*gauag,ikbjt3 dpree space?

  A solid block of metal in electrostatic equilibrium is qdg7g 5kkj07 wplaced in a uniform electric field. Give a statement concerniq77jgw5d g0kk ng the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equa/ ;gm/c qxfyw-l diameters are each given the same cw/ cxqf ;gm-y/harge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tabpo( x8/ttd g3qle in a region where a uniform electric field is directed straight upward. What can be said contg tdpox q3(8/cerning the charge on the block's top surface?

  If a conductor is in electrospqi + n cx*od0(whj98j9uod 5ctatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow met-yy p k.74,m0*2rrnp7k hkigo cihxx: allic sphere that is grounded. As compared to the case without the hollow sphere, the electric fieycorp x ikn hgi4yh7. 702k* rpk-:m,xld at a point directly above the hollow sphere has

State three properties of conductors in static equi zakx2gc 3 pchvfy/ne w*j8:)4librium.

State Gauss's law.

  The charge carried by one elecq oob 6gt;:*xltron 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 manh.:v 2c4qgy0 hlf/ gkwy more protons than electrons docv0/l2 qwg hhk.:yf g4es this piece of plastic have?

  What is the charge on 1 kg of pror-nt:ooaj (3k*edsdw4j,d qyc+-gep/ogk 92 tons?

  An atomic nucleus has uwf121nl 3 1 2r2ipkso-mirtgd+ *em/ 0vgkeda charge 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 values of 2.yxzb-iyj;g m4lbzpj,3 rj g-r;2gn- 9 0 and -4.0 mC, respectively. What is the mi-;j z np-3y;g,j4zmryxgjb9g2b- lragnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and 2iahvl+b tz.vh) :4zwthe force between them is 1.0 N. What is the z4t.bv2lh+a)v :zw ih magnitude of the second charge?

  Two 1.0-C charges have a force betweenw19kpher n 68sjlf1 0j them of 1.0 N. How far apart are they?

  The force between a lf:m7 dt/ * eijsdt:glj2e9 )r$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apartsg txjw52i/ 3 mkm0fn4, experience a 1.0-N force. If they are fjmsx4m/53 k2 0itn wgmoved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on thez- o51; q0xp5wzq *xf gg8abiw 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 mag*gzx;0wxwgqp zfa- 1 855io qbnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-ax ixi n/-o h7pszq2.lu3is. 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 thhizxs-n 7q3uo /p. i2le electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 )0dz8 seidd1d x8o:es= 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1d 81isx0ed :ed8o d)zs.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 y5y 6hj;hppu0 6 ;bywwsquare, 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 charge at the center. What is the magnitude of the force that 0uyyyp6 ; 5jb6wp; whhacts 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 = -1.0z2od mx,s i86a nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What,soi2 d8z6a xm is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = au6pqon) xmqa4 5hgz3(hu(n .d o;)ja5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chargeq nn5aaqah4o);( o ( d6)g.xujmhu3 zp?

  Three identical charges of 3.0 m*gfreq+,v8ph* v0l+ 4bcxid mC 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 thei0 g , 4v*rcmbvpqx+h8dl +*ef charges?

  Consider point charges 0(h ng7vs ;pjmr u( ap6cq:z*bof +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that t(m jg0pz cn;:p a6*7bu( rhqvshe 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 x = 4.0 hf. sx1a2(f tdsax*( a2vila)m. Where on the x-axis can a third*(hisa fa 1)axva xs(t2 .2lfd charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and cm 5kzje5 g,28us4 wrjdharge -q is placed at x = 2a. Where can a third positive charge +q br4kj8de25 5,u jm gzswe placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A top3cvj3g9:1vbb/cluag pf +dl j/t,5 wtal 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 ag*kwu g w(0b/vtainst the force of gravity by the attraction of a fixed proton some di b0u(gww/ktv*stance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threa(kxizm f)n9+ y*p+i smds which are 30 cm long smf+ix z+(mnpy)ki9* . Both are given identical 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 electfm; 4p(g +aiu1rg2gd5fq tgc5ric field at a distance of 1.0 m from t qgcrgaim+u;5fd52pgg( 1ft4 he nucleus?

  What are the magnitude and direction of the electric field atn.xa p zim)3x)pnc )+t a distance of 1.50 m from ax.n)z)p)int c+3mxap 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnit) ymk -t5/ tfcni-c4ve 5q8izvj:rc8rude of the electric field at th8ivnvrkmic:e jcy) ft8455-/zq rt -ce location of the test charge?

  A 5.0-C charge is 10 m frop48+vu xp5 fhucr6z7xm a small test charge. What is the direction of the electp 4pz 8xfx75ru6uh +vcric field?

  A 5.0-C charge is 10 pwvk+sq8d*n 4 tm .cw+0hkaq7 yo 0kf8m from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at th h4 fsvqk.8w wmtk00q*cna8o+dp 7y+ke location of the test charge?

  Two point charges each have a value o+ hkm;e7h rzd)zjmn fplw4 +*1f 3.0 C and are separated by a distance of 4.0 m. What is4m;khwz+h1zpn*7+rm)e l fdj the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickrmg ;olh0 il,*i0q8br and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at th8;l 0*rg 0libro qm,hie 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a me sgk63/f6 s75 e7vpxhmkuj2zrter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the twe762x hfm k/r v65jg3sk7uzspo charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 r:j e-yebr 3r0)a5iyo t/s kb*and x = 0.20 m. What is the magnitude s:bark -be3)/oye0ij*ty5r r of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.5, -myx9iy(i z3 gpft2v7zm )oh0 m. The last corner is occupied by a -3.0 mC charge. Find the f o igt mh3y,v7- 2z)py9xm(izelectric field at the center of the square.

  Consider a square which is 1.0 m on a nw)1jm4ei(gqs 9:fhy i;gz4c side. Charges are 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)ifies9j4)n4g:1y;q cwzmh(g; -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 7 ahv o0o68cicuzk7 5tibr;o2 mC when it is placed in a uniform electric fi7orcui8v ;h06kc5i7 za2o b toeld. What is the magnitude of this electric field?

  A particle with a charge of /0y8sqed 93rpl lwdm/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 8 cwe+6ev3ie)odca (han electric field of 6000 N/C pointing downward. What charge must be placed on th+)w38o6 dvha ccee(iee ball for it to be suspended?

  A foam ball of mass 0.150 g cp6 d lyqwan;n:se k9uh k:.+(sarries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the fkduyaq (sn9 p l;n+s:.e6 hw:korce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carri:nlkxsx e8)a, es a charge of +2.0 mC. What is the magnitude of the electric field 5.0x)e8 lk n,a:xs cm from the sphere's surface?

  A metal sphere of radius 2.0 cf)oqvg4). wuo m carries a charge of 3.0 mC. What is the electric fo.qf gvo4))uwield 6.0 cm from the center of the sphere?