State the law of conservation of electric charptv:b0l:g1fn *w hl0a ge.

  Is it possible for two negative charges to agxc f)j aci2c1 s7ca3on(. ;vjttract each other?

  Is it possible for a positive and a negatlgz 06lmbu 2 c-2s,ctduuqk2 6ive charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the proc;,v 8iq ;zzju3 vjn1:z q4zhyless the glass rod acquires a j u; :q1 ,z;inhqjvlzz4yvz8 3positive charge and the silk

  A proton carries a

  The model of the atom shh mbsn8r8eswm 8 4 vb/5rnw6z8ows a

  A neutral atom always hwx*fi(c1d+zqt-j 0 xs as

  An atom has more elecdaomcu .x3 95jtrons than protons. The atom is

  Materials in which the electrons are bow/ t35g1p t *ujyj.6cy/bmnnrund very tightly to the nuclei are referred ujgt cy/.nb61j ntp5 rw/ym*3to as

  Materials in which the electrons are bound very loosely to r7sl:0y; 1ks+xu 8plc)ize iy4r r4r bthe nuclei and can move about freely within the material are referred to a: lcr)r+ yk0yxb;se78i 1 usz4rl ri4ps

  A negatively charged rod 62tu/trl4 o anis brought near one end of an uncharged metal bar. The end of th2nrlt/o au 6t4e metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are place.u9s+1 hzwxg ed .9zx+gu s h1wenear each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod u9wal+tyjd76g70 e/chrxf8 z charge an electroscope positively?

  An originally neutraljdmdq*7 /g5ipq rx19)nfiw7v4q o of5 electroscope is briefly touched with a positively charged glass rod. The electroscoon59d *f 1xmrjpd)i4wf7 /oiqv 5q7q gpe

  An originally neutral electroscope is grounded briefly while a pos9 r /wxkg5xqv2a7*. nwrr fm1vitively charged glass rod is held near it. Aftexq7 v/vmwgf159ran2k rw x*.rr the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. n :-uxd8 n1vzx Then a negative object is brought n: 8unxzn-1x vdear the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an i-jidl.) /2 php itic1snsulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls alhl./i-t 1is)c ppj2idong 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 Coulombud1veyz g8,.au*:k b ub-dw0b constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a di+5mgj/r8-3owt ftkg.z bmn 5 lstance d. The first charge is larger in magnitude tt /gnoj-l8z m+3rm5t.k 5g fbwhan the second charge.

  Sphere A carries a net charge and sphere B is neutral. They a) :o* v4xvalkou-yz-zr 5 g8aare placed near each other on an insulated table. Which statgv)r 8 -ux*azakv z-ooa4:y 5lement best describes the electrostatic force between them?

  Two charged objects attract each other with5 vim7go u.p3t4 qzr;n a certain force. If the charges on both obje ;ngu pz.5o7r3miq4 tvcts are doubled with no change in separation, the force between them

  Two charges are separatedp8x* s lj gbgu,x9,hj) by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a , * jgx9hjl8,)px sugbdistance of d/3, what are the new mutual forces?

  Two charged objects attract each othxvlhu6,r x4 +ber with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distancu+xrxl,vb 4 h6e between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separafd2.3j;y wbw: 8xptoited by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron i pyxdf ;:w38.boj2tiws placed next to the first electron?

  An electron and a proton are separated by a distance of 8t w2na3c ptl(1.0 m. What happens to the magnitude of thtp(a8n lt3wc2 e force on the first electron if a second electron is placed next to the proton?

  An electron and a proton arem/3tsh2;k fu -,dotdj yh /h4k separated by a distance of 1.0 m. What happens to the size of th s3/ju-o;dkhkt /42yt hd ,mfhe 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(1/*)jxmh goxcjr x:q 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 positive charge at the sq/r*:(1)xhjjm xoxq cg uare'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 triz11k:aw dgv(vangle. When a second charge of +Q is placed at one of the triangle'sw:( vvd1agzk 1 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 not a vector51ewh-* ,qa :/b erfar)h w gp )nsy*eg.a)iuc?

  At twice the distance from a point wt h:l92z/mp76s- g+tnhm koecharge, the strength of the electric field

  Is it possible to have a zero electric f zwkk kr3vx9 ,6.8gsfbield value between a negative and positive charge along the line joining the t6 xk3w b9kg,r8 .zkvfswo charges?

  Is it possible to have a zero electric field value between two positxk*q; ln m*w*aive charges along the line joining the tamqw *l*x ;kn*wo charges?

  Electric field lines near psitive p.wsmy d qq6p 5c,*q;0okr,i mcoint charges

  The electric field shown 7a crdac .mizqxul.2w)dz,:*

  Can electric field lines intersect in free space?8*hwlk k2vv n i)ccg-.kesxlw3+ )3ym; e0dfv

  A solid block of metal in electrostatic equilibrium is placed in a uniform els7;ole7 nx:-rwx.zx2hy f ,cuectric field. Give a statement concerning the electric ff; e-,yxs.2r 7ux:cxnwz7 olhield in the block's interior.

  If a solid metal sphere and a hol/ 3uxo cga,ejjp10gc0low metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the s ajo3ugcx0 ej1pc 0g/,urface is

  A cubic block of aluminum rests on a wooden table in so3k(andq7s/ a region where a uniform electric field is direct7dqk sno3(/a sed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in elec8.prz45 mtfs1 .;k5kw/ bd unpo-ocid trostatic equilibrium near an electric charge

  A positive point charge isr )es+dmkb .o, enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point dirr o.k)sbe m+,dectly above the hollow sphere has

State three properties of conductors ipv .f1,ie xk5mn static equilibrium.

State Gauss's law.

  The charge carried by one electronmr1n* 0m 0l/os xuj3kj 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 man9mj ckzlufgv,g x9;;:y more protons than electronsm;g c,zuflk:j9 g9x v; does this piece of plastic have?

  What is the charge on 1 kg of lbusfd9f o/iwi *79x. protons?

  An atomic nucleus has a chargkl 584xex /3yt 9 x:sw0bixmroe 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 2.0 and -4.07o3/vgvb5s5c4h n jww mC, respectively. What is the magnitude of the electric force betwj5 cwh7vsnovwg4 /b35een them?

  A 1.0-C charge is 15 m fg56fahzdj 30 a0a oe(h kis0b,rom a second charge, and the force between them is 1.0 N. What is the magnitude of the second chargeifo 6jhbgea3(5 ks,a 0dh0z0a ?

  Two 1.0-C charges have a force between them o1 fdipi e(fz,3f 1.0 N. How far apart are they?

  The force between a 9ar+dt4 - 5mij k:xqbg$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initial/.u gzeku:kkx(wpu 05ly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 k uuuw/05x(k.egz : pkcm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. p tsd23t *ar-r The first chart *rat-sdrp 32ge 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 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 mC is pla s.has*5mm35a47juum4t wx r aced at the origin, -2.0 m C to thea4hjmasax5 w u m ts7*4u3.5rm 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 follo ..5s2q*a3 plfnpdfs(tq kx2lwing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC a(fp.q l3k5 a 22dqx nt*s.pslft 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 sqoonq5,1uk n,ej8wtq4(fs0e zuare, 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 cen4fn,keeu1n oz w 8 (0,5jqostqter. 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)p gbpa o8qw2(tjsj) -1; Q3 = 5.0 nC is at (0, jtb p8a1o- p2) wqsjg(0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0dbt /no6zx/ e:xo(9:r ggxv/u); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). tdno /zxgxo/r(v 9 ::gb6uxe / What is the direction of the net force on the 5.0 nC charge?

  Three identical charges ofcvx*;c / 6lceksc5t 9e 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude9*ceelc t /kcc;5x6s v of the electrostatic force which acts on any one of the charges?

  Consider point charges of .to tqdrju b0:wkz8f/t)-9 l6tps mr9+Q and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be jqt 9ukr dftl0o86 z/)p9.- bw:rm sttpossible 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 a njxvp3fui kyu.c /d ).3f85 gm+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on nf8) 3cx5g fdupj .ivmy/u.k3 it is zero?

  Charge +2q is placed at the origin and chargear:zrwjd *; *p.dmyx 8 -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zw *pxd:*ma.rjd yr;8 zero?

  A copper penny has a mass oysc1(k t/c8kl i-4 b/x8, gz2cth nylaf 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 o9w v:s2: laokof gravity by the attraction of a fixed:o:s olv92wak proton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point )s2ban n mz+;oby nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion fosaz+) n ;obn2mrces 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(g,rls by buh5xa x, yj.z)-+nric field at a distazb 5yrjgu)h,s x+nl ,b(.y-xa nce of 1.0 m from the nucleus?

  What are the magnitude and direction ofn5+qoxaif5m +3 r3 gtw8he,jz b;zb-/uo 0gwi the electric field at a distance of 1.50 m from a 50.0-nC m3 z bh aiq z8regx +o,5/tg0uwbw5 fio;nj-3+ charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thexzp d6u 6dy 20e,/mt d0scce+e elczdp00m2xd 6 /+suec y6e ,tedectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge.hs 4vb j+*(otaa;.jmr What is the direction of the electrir j 4 aaovs*jmb.h+t;(c field?

  A 5.0-C charge is 10 m from a small test charge. What is the mag)r k:ed0 ha fy/q8t*arnitude of the force experienced by a 1.0 nC chargeaf:yek d /q*rtah 0r)8 placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by 4xgim7c /igii,-p 0xxa distance of 4.0 m. im i0i i- /p,xx7g4xgcWhat is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed/i35lw f9zndmeh5y ;y at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric zi5/3f ;yh myed5 l9nwfield at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic6tk dmprki8.-k and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zerkd . mikp6-8tro?

  Two point charges of +3.0 mC and -7.0 mC et7 7ldx n;gu h12r4tiare placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field a;g7 rd4xn he2tu1 7tilt the point midway between them?

  Three 3.0 mC charges are at the thrx4 (cvq,,)dsw f9 ypz6gkvbr5 ee 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 center ofpw(, , b4fq5ykz d9sv6)gcvrx the square.

  Consider a square which is 1.0 m on a side. Charges are placcyuf0u tu h .,go*wdvv m-a55- 1 ooza5n3bf,eed at the corners of theowv5u0--5f *3be v myoau5o ,autg,zfn1h. cd 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 square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placb bs m.lr.8yxq(+ z)dtar pd. 1vqim+,ed in a uniform electric field. What is the magnitude of this eivzl)qt.pq1..8+,d( s m ar brbyd+m xlectric field?

  A particle with a charge of 4.0 mC has a maw7kjp:xj g9x7 ss of $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of msd9 x ps8r8v5pass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be pla 98rpvsp 8s5xdced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placnto5 * xh.zsjdrcz 89ilk7y1;ed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and y zks c;n7 dh1lx*.oj5r8 9tzidirection of the electric field?

  A metal sphere of radius 10 cm carriesm z;sq5fb( vrm2fk*3z a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm frbkz2rf v 53;fzmq*s m(om the sphere's surface?

  A metal sphere of radius 2.0 crb5bz j4k1j)fz99 tzpm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the s 1 4jj9 z95pb)fzztbrkphere?