State the law of conservation of electric she5wq;i( j0ga3u7lyk r*q +mcharge.

  Is it possible for two negative charges to attrar:/nwl cx;tty rr**9 2q3oyznct each other?

  Is it possible for a positive and a negative charge toz:2/ j ide )w:yp:iktg attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod ac:w6u*pmg/ xsjquires a positive charge axswp/ *g :uj6mnd the silk

  A proton carries a

  The model of the atom show kvtdy6k2jq/k;/i8oh2nt h:w8) b a jhs a

  A neutral atom always ha nj )i)/rq 6aao2j(jvj qh5 fhs8l(t,qs

  An atom has more electrons than protons. The atog1fa1)kh pt1 um is

  Materials in which the electrons are bound very tightly to the nux) yg/sp aex/j*c39zeiqq*+la ;zd7g clei are referred tjzq3apy/ed+l a*c9s*gq z/); 7x gxi eo as

  Materials in which the electrojp njv i)) z20fifr9xeu3n/.ens are bound very loosely to the nuclei and can move about freely within t e.j uzp)2ien0v)3fx/ijfn r9he material are referred to as

  A negatively charged rog27b7vv vt8ezd is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged 8tzvg7 e2bvv 7rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Theyjn+p,0mh e55ah jgi. g are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?5hjg0apj mn,eh i .+g5

  How can a negatively charged rod charge an electroscope positiveln5b1ba1mt4-2 2 qmoiggfc.lzyga8 l 8y?

  An originally neutral electroscope is briefly toiv.sva 1hu0xf( /u:hn uched with a positively charged glass ronv/ v(ah1.s xfi0h:uud. The electroscope

  An originally neutral electroscope is grounded brieflq,9ikl6q:wb0wm)xn x 4vjw 2yco 5e+py while a positively charged glass rod is held near it. After the glass rod is removed, the4w9wq mi2j6v xox e)k5p: blqcy+w0n, electroscope

  A positive object touches a neutral elects* gbq,l)tfg x 8fq-9 bzakc(ko;(/ peroscope, and the leaves separate. Then a negative q qsk cxbk -z;/p*9fbo(()lafgg e,t8object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated ta3q84v:,e 1ltarhw+ oujmfw9w 6f8ymp ble. A neutral metallic ball rolls straight toward the object, but stops 6you:apw+1wwq3et8 9jvl8hfmm fr4 ,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 Coulomb c1:jdlgsjjcvpzrc.r7 8 )/n k2onstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a dpbq9lzn mq b.)m5h6c9 istance d. The first charge is larger in magnitudq.m qp h )6mb5nb9zlc9e than the second charge.

  Sphere A carries a net charge and sphere B is neutral. fqi o07 gla 2yy,puz7* They are placed near each other on an insulated table. Which2 lpuoyyz,i *0q7agf7 statement best describes the electrostatic force between them?

  Two charged objects att7u-7pglb ko:v2s r57k )v jzhzract each other with a certain force. If the charges on both objects are doubled with no change in separatis 77oh5vzzurp -k7:)b2 jkvlgon, the force between them

  Two charges are separated f3dst,3x)oaz by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the ne3t,dx s a)o3zfw mutual forces?

  Two charged objects attract each other with a f xvbqmiko2o (. (ovh0(orce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and tv xoo.2m((q(oib v0k hhe 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 s t89 w,wahr*-ivsw0g5:mtjm by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the gs j-m 0tmwav9is :hw,8wr*t5 first electron?

  An electron and a proton are separated ewe+ 1l6, cutiby a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is ewecl6u+i,t 1 placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to*v :chz9e yin5oua:u rg*(n9.yab:n m the size of the force on the proton if the electron is moved 0.50 m closerz*aoa b(5n v mh :9:uignu:.ny9 r*cye to the proton?

  A point charge of +Q is placed at the center o0f at7i,uwfh4f a square. When a second point chf0fti, 4hw a7uarge 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 the positive charge at the center of the square?

  A point charge of +Q is placed at thea2,z n2 g8ejet centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triaeznt2 ea,g8j 2ngle'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 followinr 5k b*/gr v:t 5zk/ei8zlrg )r7ybtq.g is not a vector?

  At twice the distance from a po/8i4rnsr e*j sint charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negativewflur9g 9i gem d8j/ o8j0o,w kzs3f67 and positive charge along the lifu9 /m,wk 8owe 79frois3j6dgj l80zgne joining the two charges?

  Is it possible to have a zero electric fieldjp,rgj0cnv5z*ab5ui5g ;:n 2sv z ao, value between two positive charges along the line joining i j;2sro5bnzn gcu*z5p: v,5, jva0agthe two charges?

  Electric field lines near psitive pi 1)juv: *xfigs9- fnuoint charges

  The electric field shown qy)1 dg:tmm2l

  Can electric field lines intersect in fredc:aqf7q4 t,- 9(rzcv-ctjx me space?

  A solid block of metal in electrostatic equilibrium is placed in a unik7 s m2u9asu.gform electric field. Givegk um.s27us9a a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sph5z oqe (58hgtuere of equal diameters are each given the same charge, the electric field (E) midway between the center andetgh5q5 zuo 8( the surface is

  A cubic block of aluminu)er1.cmxa-n +)gvso rm rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surfacocsg +r )-mnr1 vax)e.e?

  If a conductor is in electrostatic equilibrium near: ob).2kiksh:l p6 9iacvd uj* an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thatb*poupkg .6l-, j2i gi is grounded. As compared to the case kipu-*g.ojb ip gl 2,6without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conduc:ftb5cn jlc9 .tors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is n9z6ozsw/y 69a/, oeo n h2wg kogr,r/$e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic ha1+d2 g*,n3zpw) ccxqx *cwo nas a net charge of +2.00 mC. How many more protons than electrons does this piecxcqc)gazdo3,* 2cnxn1p+* wwe of plastic have?

  What is the charge on 1 kg of prot;*ep*t52 hxpy;qd5 io tt-wnkons?

  An atomic nucleus has a cvy-tv2w .dxnxqm;tg/-s rojt( *0 wqjs-vq1 1harge 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.re6 zwei-::/ h9ehm-pph w5 ss0 mC, respectively. What is the magnitude of the electric force 6hhs: i :pre w/w9ep-m5-ehzs between them?

  A 1.0-C charge is 15 m from a sea h));n-f uky;jo 4lmuibt ku ;zo4-4econd charge, and the force between them is 1.0 N. What is the magnitude of the z-oo l- uma4hbfi))j 4;et4kk unu;y;second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart o4dahj 1daee)d:yrn)s y o62(are they?

  The force between a 8p,zpu +kag.;mcr.gc$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ak/ 8 ;w2nq0z1e a ivzb-:xwyjexperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the -nkv12bxqw/ye ;0 :8z iwzjaa electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. T1zvw;n- x4 pcs9hu6t mhe first charge is at the origin, the second to the right at x = 50 cm, and the third is at 9mscu xvwp46;z -nh1t 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 aff, ruc+s. .n4lnygl kj*r w52re placed on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4. ugcnrr+5wkf. n*jyf4 l,s.l2 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 following positions: Q1 = 2.00 mC at x k 3f1p - uzga9qz*g8q dqq;ke (:voj:i= 1.00 m; Q2 =p zi(q8;fqq1qe:kazog-j :gv9 * d3k u 3.00 mC 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 p. l/l),xdy 5pcbb:n4q4a ayn alaced at the center of a square, 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 : .n,ypababln)4ya4c /d5 lxqcenter. 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 arm pi;;544rcx pkovd2 t (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nCrd4pkxmro2vi ;p;45c charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q25ao 2exm/c.o b = -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 5.eboo m/a2c xthe 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilaternqhd6 hw,nfown1 *o 8+r* r00 ;ewu.iubq.nmqal triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whichnmq .6 q rf+rqdo ,wbhnh.0n1i*0; 8weunouw* acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated v4 : jgmwgs4;qby 3.0 m. At what point, on a line between the two charges, would it be posqm4gjws:4 ; gvsible 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 a f kzri,yn125fnd a +9.0-C charge is at x = 4.0 m. Where on the x-axk2f1zrn fy,i5is can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at yp6lg ad9) yg(( kqlvf/7p 8vcgeau,d s61qj,the origin and charge -q is placed at x = 2a. Where can algguk,d,vlef9g(pajq8 1 v (yqp /d s67cy) 6a third positive charge +q be placed so that the force on it is zero?

  A copper penny has a ma e* deju (pw4nt:02xivss of 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 gravity by the attractiog fp 5d 9.mwi( 0khun7yqn*)qkn of a fixed proton some distance abovdkq59q k )unmpghn i.7f*0( wye it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung fr o ch;n+ibm9g:om a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electc9mi+ :;hn ogbrostatic 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 pmf)d7 mg:imt)ny - q:of the electric field yd-:pn t7mim):gfqm)at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a dista: fj7i vkmc5-rnce of 1.50 m from a 50.0-nC charge5fm 7-:jkivc r?

  A 5.0-C charge is 10 m from a small test charge. What iswy* pcsvu67j /y95ot s the magnitude of the electr*scuyst 96y7/5pjov wic field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is:q hf1fp1p 9):ccqc is the direction of the electric fi11:pfcq)q:9 s hp ficceld?

  A 5.0-C charge is 10 m from a small test 0y homhv/(+devz p6;dcharge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the locatim(/;zhyhv dpve6+0 do on of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a dis;jx ffnx ds1h(s,32mb tance of 4.0 m. What is the electric field at a point midway n fhsbd3x(s,f2j1x ;mbetween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a 1j kov(x34;sv)r*mcydfd .nd-4.0 mC charge is placed at the 50 cm mark. ndx)kd d *(vcfo3.yv4s1;r j m What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -t1bio8pj 7uq m:2xlyxz+ 3g9v4.0 mC charge is placed at the 50 cm mark. At what point on a line join:87vu +xpqlg izj3mb 1t92 yoxing the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.8pq8kba,5dw qh/kzr: 0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between the 8kqr/p5a:z8wqk,b hdm?

  Three 3.0 mC charges are at the three corners of a sqtk bhbcovgu60 w/0v6,uare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the st,kv v6 0/6gwhbo 0cbuquare.

  Consider a square which is 1.0 m on a side. Charges are placed at thokwr86udg;wkn69k 6 kf mfr1. e 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 w6n 6kr81.uo6fkfw m9;gdrkkat the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is p/q-obadg+ -*n p9msqb laced in a uniform electric field. What is the magnitude of thi/bgp+- q dbo9nas q-*ms electric field?

  A particle with a charge of 4.0 mC has5wi zes t a84 lqr9,kgo-vca;, 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 an electric f7 uxv)0;q pzbmield of 6000 N/C pointing downward. What charge must be placed on the ball for it toxu;7mq )pzb0v be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.0gu-3mq hxjneh -,m1i *0 nC. The ball is placed inside a uniform electric field, and is suspended against tm3hnuqh ,j1gix m-e-*he force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radiu.rb7h 3 /mu7huqv9sr xs 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphsu9/7qxhr r3 7vb.umh ere's surface?

  A metal sphere of radius 2.0 cm carries a chargelon9l uz(* x2f of 3.0 mC. What is the electric field 6.0 cm from the center of the sz n9f xlol2*(uphere?