State the law of conserd* hk brtkt)xfplf+a0e l27;/ vation of electric charge.

  Is it possible for two negative charges t ,s idwny;v .0l2k8ntto attract each other?

  Is it possible for a positive and a negative charge to att7/ djxig9t;e5 qwz7m nract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rszk8, h n;wsg0od acquires a positive charge z 0ng,hk8;wssand the silk

  A proton carries a

  The model of the atom rxqs +qh ec52c/ww*: qshows a

  A neutral atom always vk(+)ja+ frk jv zx44xy1ay .whas

  An atom has more electrons than proton txanft yj2d/bjm;j3e9)wj93 s. The atom is

  Materials in which the electrons are bou)b:1dp enn:l6h 0gtkc nd very tightly to the nuclei are referred to:6)egp: thnnbkd0 l1c as

  Materials in which tau u,6 rg-(kf1oqff a*he electrons are bound very loosely to the nuclei and can move abouta ufg1f(,fko r6- uqa* freely within the material are referred to as

  A negatively charged rod is brought near one end of an unhuml:y+0q5q imm:mb 6 charged metal bar. The en bq +y mq5hmil:um6:0md of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is n k,wne /bpwtf80/cf1feutral. They are placed near each other on an insulated table. Spherww/b /cffet8p1 ,f0kn e B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge asg:r zx efwy,u0n kj0n(5) b1 yf+-upcn electroscope positively?

  An originally neutral electroscope is briefly touched with a positively charg)bjq6aoq;4z/rkn rq /ed glass rod. The electrooq rz /q;rjnq6 4b/)akscope

  An originally neutraeq3 j6vk5;iq zl electroscope is grounded briefly while a positively charged glass rqz6ki 3e5q j;vod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. e0 +46c tryi7lbh0gakThen a negative object is brought near the electroscope, but 0 ia7e4b0glhy t6r+ckdoes not touch it. What happens to the leaves?

  A large negatively charged objl 662wx4r zdmkdyuj97ect 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 first ball, and stops. The first ball rolls forward, but lz r2km47ju6d6dxwy9 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 co4unrfzg f -;kb /m)oc9nstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is lf9taw-nn1c cky x6+o4mz /w7v arger in magnitude than the second cha/1 y9mfnta+zx7nw-6 4owckc vrge.

  Sphere A carries a net charg:w/h- iupp+jod6in ll+/q k,j e and sphere B is neutral. They are placed near each other on an insulated table. Which statemeji6u ppwid qln:-o,+/ +h klj/nt best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the :*nex,ev zrk)3l4gmcy 1 (d ywcharges on both objects are doubled wit y nz)e mdeyc* :r1lx,w43k(gvh no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual atdva8 6z) y j jk(d5clze.zh fjw8pv173tractive forces of F on each other. If the charges are separated by a distance of d/3, we)1v7jyz6 f.38awz j85pd (dvkcl zjhhat are the new mutual forces?

  Two charged objects attract each other with a force F. What happen9e a*m0j- w2vm-axk pes to the force between them if one charge is doubled, the other charge m 0-meeap2 jw-9kx*v ais tripled, and the separation 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 disyhv.8ai(f8 hq0wl- 4.iczfqvtance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to lz- . (w4f 0icq. 8h8fyvaqhvithe first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happenso3.c3041ex;wypei6od xu fwj8 y 4fvi to the magnitude of the force on the first elejy i46vox.1p8ixu4;fe d3 e3fcw0yowctron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance y:u,kltw1ushe + 44aeof 1.0 m. What happens to the size of the force on the proton if the elect,+heaue1uslk4 y:4t wron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cente 427sl(5qp rl/ri rmpxr 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 positp s/ ml(7i4prq r2lxr5ive 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 tria -g q5bfm*2vq1h i5x)iq vsmh-ngle. 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 acts on the center charge due to a third chxvv g2i sh1q-f-5bmq m qh*5)iarge of +Q placed at one of the other vertices?

  Which of the following is not a vecto ap. bnk95jp9j:v,akp7hmh (ur?

  At twice the distance from a point charge, the strength of the elecn5;zm qy y(pdjjl 4/0atric field

  Is it possible to have z*ny1g w; mag.a zero electric field value between a negative and positive c*a.; g gnymw1zharge along the line joining the two charges?

  Is it possible to have a zero electric field value b.fkc4f*nb m9z i u*v78j+yli xetween two positive charges along the line joining the twoz8 f.m4cxib f9j*+v ni yl*uk7 charges?

  Electric field lines near psitive point cc jmy: ed,dq-,harges

  The electric field shown8 hwjqk,vk zi 7b34 /mbtx)5nf

  Can electric field lines interseci4 ifmp0sz qb ffyic9+ 6.11o-w+bjcqt in free space?

  A solid block of metal in electrostatic equilibrium is plaay uwvx3 u-/ga36m;uh 3x+ qohced in a uniform electric field. Give a statoumu- x+3gv6h33x uqw y/ ha;aement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal ivxc ,-3:mw uvdiameters are each given the same charge, the electric field (E) midway between the centexi w3-m:uvvc, r and the surface is

  A cubic block of alumiz1u-, 9cudf1ibp )k0 j ulg8nonum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concernfu0l-co8jik1 ,dg p9) z1ubuning the charge on the block's top surface?

  If a conductor is in electrostatic tfs + . p42u*9gh/uueg jy8ylotqa;.o equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that if3ln/tr1nnnv;xpbu15- ms 8cs grounded. As compared to the case without the hollow sphere, the electric fnm xc15tnfs-;l nvb1/ r3n8p uield at a point directly above the hollow sphere has

State three properties of conductors in yy hsb2gz105+8nzpr l static equilibrium.

State Gauss's law.

  The charge carried b m02+s km/dm aa 1-u.dmbtfir2y 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 ne0o2q9axyidy /u)e 1r at charge of +2.00 mC. How many more protons than electrons does i1r9doq)a xea/0yu2 y this piece of plastic have?

  What is the charge on 1 kg of protonssh cl gr);66op?

  An atomic nucleus has a charge of5)2pm4to ycxg $+40e$. 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 2.0 andp3 l9,iuwl :kb -4.0 mC, respectively. What is the magnitude of the electric force between p w:k9ulib3l,them?

  A 1.0-C charge is 15)aebxkux 7 k17 m from a second charge, and the force between them is 1.0 N. What is the magnitude of the second cakbu1 )ek x7x7harge?

  Two 1.0-C charges have a force between themf n,cgw.ia5t7;. qnca of 1.0 N. How far apart are they?

  The force between a ,1i9bi g0p.cgdqm+4 /i(uxdl/ rs lyb k.nv(p $30 \; mC$ 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 force. f;.vabli ;;s),ltnoc /mmp: (aquw)t If they are moved to a new separation of 8.0 cm, what is the electric force between ta tw i c;m;p)ll aou.stf:)(;m,q vbn/hem?

  Three identical point charges of 2.0 mC are pks;sr+ hke8(a z k5z-ulaced on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the t-+5uhk( sazzsrek ; 8khird 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 mCxrf-+ngr,m:/s 8as zz is placed at the origin, -2.0 m C toarfm+ sxnz ,-:/zs8gr 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 the charge at the origin?

  Three point charges are located at the followum)ed iaz31)ning 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 magnitude of the force )1zen ai) ud3mon the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a sec*pbf ./n, odivqo8n8 kond 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. Wha8dn ,bopvo i/.f8*q nkt 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 = +61jts q9la v qq-k7hy5.0 nC is at (0, 0). What is the magnitude of tys+hjv6q-1 a9k tqlq7 he net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, r+r4g3: bxw,xja qjf00); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction or,r gf0+q:wjj3 a xb4xf the net force on the 5.0 nC charge?

  Three identical chari/4rg7ewu rh8w ihu01xp2-so ges of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the ele0gw1ox4h /r whius27e-p8ru ictrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m3 k81kgtve7r6*t iale . At what point, on a line between the two charges, would it be possible to place a charge of -Q such tha 1avetg87 i *36krtelkt 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 x = 4.eu8vxsb, +u;m 0 m. Where on the x-axis can a third charge be placed so the net f;us,x+uve8 mborce on it is zero?

  Charge +2q is placed at the origin and charge bh)zm n72y o(zp us:9/6t ;mi,yklwex -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zerob hzkyzl ) /7um2(: 6p;si eyt,mnow9x?

  A copper penny has a mass of 3.0 g.x s*tg( lkf+n; bzh-u4 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 gravity by the attram5cvpjx98i, zqij .n )r*zlxln *i4u ;ction of a fixed proton some distance above it. How far above the electron iri vmqp8xn zzx ;jlc,i 94* ).*lniu5js the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads kgre;z vz wrmi7iwz: )/p.r 82which are 30 cm long. Both are giv;rk7: mg.rpiz2w/wrzi8 )e zven 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 magnitfshq/dgedq - eia go ).p5-/0jdw2 +mgude of the electric fif /-djgh)qgdide2w.5-s p om/g0+ eqaeld at a distance of 1.0 m from the nucleus?

  What are the magnitude anrbf,snw273 dv5 ox3uh tk;b i.d direction of the electric field at a distance of 1.50 m fromt r2ohwvuin. b,;kb37fd s53x a 50.0-nC charge?

  A 5.0-C charge is 10 m fr3-tqtvw9/v ) h.t3he6xzqh j bom a small test charge. What is the magnitude of the electric field at the qvh.qth jv9/tht)wxb6-3 z 3elocation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of th2 n9v(en) xy7xd 4lv3rh ekr)pe electric fieldpx297 )e xk3envrl4hyvr)dn( ?

  A 5.0-C charge is 10 m from a small test charge*/qb xfia myf2j/4pc,. What is the magnitude of the force experienced by a 1.0 n/ x,fpmf42jq abcy* /iC charge placed at the location of the test charge?

  Two point charges each have a value ob; (hqook7 j3rf 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between rb3 h7jk;oo(qthe two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic1a:b 4t:ipurhw/r2wc k and a -4.0 mC charge is placed at the 50 cm mark. What is rrbtca4/ w2 w:u:iph1 the electric field at the 30 cm mark?

  A 5.0-mC charge is pl.4rgdrv6 m5 hnj,d-hf 9sx e;zaced at 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 ch er- dzhv.6mr9g4hnx ,jfs; 5darges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x =0hor 6d71eira 0.20 m. What is the magnitude of the electric field at the6 0rore7d1ih a point midway between them?

  Three 3.0 mC charges are at the three cortsokgemmv:lki d+l2h( -c7n: 92fc m -ners of a square of side 0.50 m. The last cor2:9 7 ksiml+-m-vcfth k co(g2dm e:nlner 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. 7+unys0) ma-nhz g)x q Charges are placed at the corners of the square as follows: +4.0 mC at (0,xq+ h)gy-)n 0uzasmn7 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 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 mns *skme 9sg4)k.np0,f-fbe electric field. What im,np-kgs4n9fsf )0 .sm *eekbs the magnitude of this electric field?

  A particle with a charge of 4.0 mC has ax js8uj h)s2z8s/0v:1g z+/vdh xohbp 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 plac 4;kfxncn (gm9ed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball foxkn (4fgcm;n9r it to be suspended?

  A foam ball of mass i5 za )f3 pk.iqzm9tk-vmm6 4p0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the mi tk.)q6m4fpvp kma5-z9zi3force 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 is the ma e7p:ng*ip2t21u :jm; abnvsygnitude of the electric field 5.0 cm from the sph np1*tv:j; :pieb 2ygnsau2 7mere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elet k1va8dn 8w:q6n9k kmctric field 6.0 cm from ttadk: qm8n86v1kn k9w he center of the sphere?