State the law of conseo;wxox 6 sp;t*rvation of electric charge.

  Is it possible for two negative charg.*yl3-ngbx sz kvh5 f:j aomny0 u2r:,es to attract each other?

  Is it possible for a positive and a negative charge to attractzc;i1rrod.qq5y* ;mrkj7 ug, each other?

  A glass rod is rubbed with a piece of silk. During t:.d q)a k rxdy*tx0u;phe process the glass rod acquires a positive charge and the sil yxqdx.t: )pa0r*u ;dkk

  A proton carries a

  The model of the atom shows ox5oyu:n1w( ta

  A neutral atom alwayskjsh7 c9a( qbmd1(.ol has

  An atom has more electrons than proto ii4gm(wst:0wv in06o ns. The atom is

  Materials in which the electrons are bound very tightly to the /,sn jc7g hv7bq am4o1nuclei are referred g m1a,7q bjc/4v oshn7to as

  Materials in which the electrons are bound very loosely to the nuclei ak23 yf97g 7y tuek;nkjnd can move about freely within the material are referny2 77fku3tj ky9eg;k red to as

  A negatively charged rod is bro9) e2mfdc yee6+49u8eqdh jjsught near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be char 6ejjd2d 49ces8 9ehuf+ymeq )ged

  Sphere A carries a net positive chan;x5 hvo)a9m)g2c9wz7qoq m,il byq+rge, and sphere B is neutral. They are placed near each other on an insulated table. Sphereo czmov 7q,wm ;iq2)qh9bxga l)9y 5+n B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod char 3rc zwicp,)q4x g6td5ur9 va.ge an electroscope positively?

  An originally neutral electroscope is briefly touched with a pokb)y. 3lurw2: xnw5ox sitively charged gl)r 3wk5w2yxub nl.:xoass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a posit9v1p l jch1h6*0m hplfively charged glass rod is held near it. After the glass rod is removed, the electrljfhhpp9c0 16vh*ml1oscope

  A positive object touches a neutral electy,w ho oru+al,/e9i b9kxn,k1 i2qr;uroscope, and the leaves separate. Then a negative object is brought neany ,,k/ia ,+i9lhk bur;1xoou92rqwe r the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an in)k7fh xbcd 0e ;/gfu7ysulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the pathhf ; ce7ux7dyb0fk/ g) 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 consd4s.yqt;w v - 95yfzvetant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is bk,-e0 x1,bnmu x) n4a ,9zdbihyu fc5zg/6tqlarger in magnitude thab1tu),09m,- ng5 xf 4,bnbk c6 zhidq ueaxy/zn the second charge.

  Sphere A carries a net charge and sphere B is ned(nrurt m /5t2 84b,zmgt5pz rutral. They are placed near each other on an insulated table. Which statement best describes the electrostatict 4 gub(5r r ,mmt825tzz/rdpn force between them?

  Two charged objects attract each other with :af0 woocbh*orr) 9l5 a certain force. If the charges on bcr 95*o afh ro0l:w)oboth objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutua prkvu.+6oaw4sf /9wh l attractive forces of F on each other. If the cha/voh9kw+ aw6.f spru4 rges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens hon, u )z)x(p9vej (vn:ulm0r 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-fl)jz 0(uh9u)ve(x:p no n,vrmourth its original value? The force is now equal to

  An electron and a prozf)3vz4 pncydqp* 49xxt9i 8ston are separated by a distance of 1.0 m. What happens to the magnitude of the force on 3y4p 8 *fivnx dxqs9c4) t9zzpthe proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dia zkx*m8qlt +a:im09p stance of 1.0 m. What happens to the magniapm8*l90 ia+z ktm:qxtude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a disnm 5-/tksm,b ktance of 1.0 m. What happens to the t-bm5 ,kskm /nsize of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secondsy wv(gx(yqi))i ,wd.mbh 0,e7 7wp jp 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 pp,()yj wseqbyd. (0g7i w 7vxhwm),ipositive 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 atv4alnr-y6vnm gn0 )*tx th9-x the centroid of an 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 acts on the center charge due to a third charge of +Q placed axgr--l)m0ny6v vnn49h t*xt at one of the other vertices?

  Which of the followingkpnxg qj 91gld ,/qu3* is not a vector?

  At twice the distance fr x5.xth:(ig:wbk0pw gom a point charge, the strength of the electric field

  Is it possible to have a zero electric field value be hyh+c*m6 x8yyx)v u0jtween a negative and positive charge along the line jo+)*yh vjuym 06xxych8ining the two charges?

  Is it possible to have u7h+fc m koy up/2t2w/a zero electric field value between two positive charges along the lin +2ht/fk7m /copu2uwye joining the two charges?

  Electric field lines nea t abs;s1)7kydr psitive point charges

  The electric field su 0l)a2 v.nlo ut,wx)lhown

  Can electric field lines intersect in free*i:8v veenv 6tt fy1y0 space?

  A solid block of metal in ele;vbuu.i7edy gm ) li mv/+b4x*ctrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the elec .gyiu*4b+i vevd;x u7lmm/)btric field in the block's interior.

  If a solid metal sphere and avu dl2-u5r9p f hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center an uu pdlf9v2r-5d the surface is

  A cubic block of aluminum rests on a wooden table in al84 )jz kytr 9;;hl o1 kzzot8jsjq28u region where a uniform electric field is directed straight upward. What can be said concerning the chark9) ;zto8 jqzzr k;jl8y8ut4so 1 lh2jge on the block's top surface?

  If a conductor is in electrostatic equilibrium neaw+g* ;n8t kbta q2j/by./uvbjr an electric charge

  A positive point cha,tl2km,hd7g tfc )x/u rge is enclosed in a hollow metallic sphere that is grounded. As comparedmtxlg)c/ dtk u, 7,2hf to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductorb+lydre9 9 6 7z7m uo*zbe-mwxs in static equilibrium.

State Gauss's law.

  The charge carried by onelu s+yu)fe4 f3 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 net charge of +2.00 mC. How many more protons *sjt-z y 51dxdthan electrons does this piec -jxy sd*dt15ze of plastic have?

  What is the charge on 1 kg of pro /sowyl b:l0 nhap3 j3.x2*6vaa4lll stons?

  An atomic nucleus has a charge o)odovdp y- uuqgq), k5wf,7x3f $+40e$. 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 o jvi- k4hnx69cf 2.0 and -4.0 mC, respectively. What is the magnitude of jxh -6 nkc4v9ithe electric force between them?

  A 1.0-C charge is 15 m frobx2zxsn55qm 7okc8 hs)*nhz3 p5ym(am a second charge, and the force between them is 1.0 N. What is the magnitude of5 7(5)nc 5ony xssxz q2hpkm*83bmahz the second charge?

  Two 1.0-C charges have a force betzusagwo d)7a.m7ho, , ween them of 1.0 N. How far apart are they?

  The force between a 1q+vc* t kcr/o$30 \; mC$ 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 1rxt4xy yd40d+.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force be4x4rt0+y xdd ytween them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first 5l h-g3 f:ddqm+ j b3n,if:lejcharge is at the origin, the second to:f-3gj 5,d :3ieqm+lfjnlb dh the right at x = 50 cm, and the third 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-9/)g l(ihhoxe 4o5 tw,rd)pesaxis. 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 the charge at the origie4) oh /5lopx( gs) re9hidwt,n?

  Three point charges are located at the following positions: Q1 = 2.00 mC at 07l q d4 2vuq75kim-pihv e5xjx = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magd7j5kv2pixqe0-mqvih 7l u 45nitude 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*+y4t;n t9ovw0umpbp2 gdw p/ charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on thwo+ g;9bpt0m4yu n2/tppwd*v e positive 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 (0, 0.10 m); Q3 = 5.0 nC i(ihv1r ocicd0- byki 4 b01i*hs at (0, 0). What is the magnitude of the net force on the 50ryiioh0ci1b (*c b-ikv d1h 4.0 nC charge?

  Q1 = 6.0 nC is at (0.30 me78a ; q;ha( ia:aqvls, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC charg;( a siaaeq; hqv7la:8e?

  Three identical charges of 3.0 mC are py.nj /qzq*b5tlaced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the elect*qqznjtb /5.yrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separoav0;b5uox t 89k 24bpaxq9te k2e a,bated 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 the electrostatic force acting on it would be zerb8o; exa5 xoq0t9b2eb2,9 v4aaupkk to?

  A +3.0-C charge is at the origin and a +9.0-C charge i/5,i*1 bj;nf lmstoc68 wgjobs at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force onw l51fg t*imnj csbj,8;o/ bo6 it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherb d + scqx(gt+8z/8yvre can a third posit+ b/z8t gd (+v8qxcrysive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A2+rsioav8 rl95 :hpyrz 6 hjs( 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 o( sq(ppjk0z ox(y/ )uank0wc(f gravity by the attraction of a fixed proton some distance above it. How far above the electron ipqu oc)js/zp(y 0x(aw k((0nks the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduc4.x 218wg .r tin4ldufv3lbtsting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between tdt12uixf..gw v3n l bl48r st4he threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude obyhzv+*dlwx 1, j8gio/ a 5oi/w (lwn7f the electric field at a distance ofw//l1lvx7,diaw( 8oh jb 5* +nwog iyz 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fi f)urtvq.n0 go3q5z(leld at a distance of 1.50 m from ougl )q 5tv.0n3q(f zra 50.0-nC charge?

  A 5.0-C charge is 10 m from a small tespk-d+nz0:xr - fr(7hie2xylj t charge. What is the magnitude of the electric field at the location of the test chargnlyr--:rp0 e2fx+jkx i (dhz7 e?

  A 5.0-C charge is 10 m from a small test charg4 q.5 k88tvziuq 3pilskn/+gpcn k2+ve. What is the direction of the electr4p 8.vk+un58qn / ktg32 slciiv+pkzq ic field?

  A 5.0-C charge is 10 m from a small teflbp*j hr o-12st charge. What is the magnitude of the forcp 21ofhlr *-bje experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a+rf2w/ti6jc2iqr6i4 ybe8 1mejx n;w value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at wx6e j1ie n 6w28rri4cq2mib+/yftj;a point midway between the two charges?

  A 5.0-mC charge is placed at the e1)a20jfhkv xje 0 s5/f3fqpu 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. W)2u31j /qk0f jfse v0fpx5 ehahat is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a z ;49np6cbh pe 4iasnp i4.hn7meter stick and a -4.0 mC charge is placed at the 50 cm4ii n4zb96spphn.ean 7p4h ;c mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.u 78ya caxg22n0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is u2 ycaa8gn7x2the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners o e - agose)i,0va:(tknf a square of side 0.50 m. The last corner is occupia-:ke0) nigve a(tos ,ed 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 si (wf f4(qu 7s5tr.zlz 1j7prgade. 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); -3.0 mC at (0, 1). What is the magnitude of the electric field at the squar ta7zprgf 54w.f7 1 zjsrq(u(le's center?

  A force of 10 N acts on a charge of 5.0 mC when it is pl8. emn)w*eo sxp (o+coaced in a uniform electric field. What is the magnitude of this electric )we (so * .+nmcpoxoe8field?

  A particle with a charge of 4.0 mC has a mass opotg syc 23.i5xy7 mv6f $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed in an electric x/ cg4-atueuo:b 86r:m grhsc;4feb; field of 6000 N/C pointing downward. What charge must be placedg rtc8aur:;4/ch: u;emoes bf-4 6bx g on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. ;fvo(x:kjk-fqff ys0bi+) .sn jmy)4 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 esqj)v .f o nx yski:(-); mkf4+0bjfyflectric field?

  A metal sphere of radium/y rzj 6l rd8 3olalp;0;kz -nrgg3k6s 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfacln r8-3jk;;dg/6ag0m 3olkr rlzz6py e?

  A metal sphere of radius 2.0 cm carries a cf r3qq+n.2az tp.ago4 harge of 3.0 mC. What is the electric field 6.0 cm 4zrpqao 3tf.+.gqan 2 from the center of the sphere?