State the law of conservatiobrdubwg8 j9:h 4 50*,cwlfveqn of electric charge.

  Is it possible for two negative chargesw;2.wp q 5doxk to attract each other?

  Is it possible for a positive and a negative charge to attjw9.teztc0 )iract each other?

  A glass rod is rubbed with a piece of silk. During the processdw 4jy6oxp 5j/ quml/m::zb3ugof 2-n the glass rod acquires a posit:2 -u uoxnz3q /jlmm4 pw56:yjdofgb/ive charge and the silk

  A proton carries a

  The model of the atom sh; yirmhx9dn+ hb10 7hfows a

  A neutral atom always has7 r 7lefcz.:7wvbn:hkb8+al: .ox fhp

  An atom has more electrons than prot7 z0cygnl s.2jons. The atom is

  Materials in which the electrons are bound very tighnqk4e5rf;8 v,y 0vpn ptly to the nuclei are referrq,p8fv4k5 ve y rn0;nped to as

  Materials in which the electrons are bound very loosely to the nuclei and can 3khefl9 glv8)2dt (g hmove 93dg)k2 efl(v8 hhtl gabout freely within the material are referred to as

  A negatively charged rod is broughin/4skkx 08dmb 6r+npt near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be charge6sx nikrd8m/np+ 04bkd

  Sphere A carries a net vke 5r(gcjbgn+2(hn9i9jeum 9 7:r rxa /pr6zpositive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which st 2g r 9a j(uv :rke/9hgnnp7c(6rebri9zm+x5jatement is correct?

  How can a negatively charged rod charge an electroscope positively?9wp-k,6 q(h* wv6an1jlbnee jva 6(fv

  An originally neutral electroscope is briefly touched with miwgroc6/8 daex58uz rsp 754a positively charged glass rod. The electroscw rs/ga6z u4 ipo8mec7rd 8x55ope

  An originally neutral electroscope is grounded briey1: e./ f)cirpfmht a5fly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscopfce /t1)5hym apif .:re

  A positive object touches a neutral elec *)n 5iw8ogihmtroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens tniiw)o g 58m*ho the leaves?

  A large negatively chargeq vw)g: .ja4e0k jnc+bd object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops befor:jgc)0 k jebw .va4nq+e 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 Couloms3 oy3tewc4c +b constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is la ;6 -m:cgrmiwkbpp/: brger in magnitude than the second w -ipbr:pgm 6k/m:bc ;charge.

  Sphere A carries a net charge and sphere B is neutral. They are p raoyco7;:jf)u 7eg) *ls/ kpdlaced near each other *oj7k fagls:7rdcp))/u;eo yon an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a ta5i zf+r1sg4(sa0z qcertain force. If the charges on both objects are doubled witht(zg05z1+sr 4a f saqi no change in separation, the force between them

  Two charges are separated by a distance d k qqc 3j1qb7e 0tox0f*and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what q7kc0ftx ojb*q 3 0qe1are the new mutual forces?

  Two charged objects attract each other with a foz0 piok3e,da yg 4kl2p27se1srce 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 0 2k as2es7k,p4e3iz goy1l dpits original value? The force is now equal to

  An electron and a proton are separatedm5b hwlmu6/6 a by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second u65/bal mh6wmelectron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happef8 -7cffhm lfv2-wk 5ens to the magnitude of thff5c8f 2 kwe lv-7fmh-e force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What 0rkm h g5u;s/qhappens to the size of the force on the q/;rgh50m kus proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed3ea+bijrd52 y1w - pjd at the center 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 positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. What - i praedybjj51dw2+ 3is 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 trian8y/: mngxmq e1gle. 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 tmx8:/y egn1mqhat acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is f/iig;jhi3t.not a vector?

  At twice the distance from a point charge, th6 k;,i w/sn5xcem kv-ge strength of the electric field

  Is it possible to have a zero electric field value br/elc0ye mbbnh- rj;. e0h.l,etween a negative and positive charge alom ycejb 0hll/h,renb.-;r 0.eng the line joining the two charges?

  Is it possible to have a zero electric field value between two positive9 gu4j7ekby. c charges along the line joining byg7cj94ke .uthe two charges?

  Electric field lineseo6fwbv2q b+e. 5 ci6r near psitive point charges

  The electric field shown ;99kdi-knn; ;eruqi p

  Can electric field lines interfr. br :bb-fr,sect in free space?

  A solid block of metal in electro*84-gl y dournstatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's intu4 d8- yrglon*erior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are v0mv*;ax.yh teach givem.;tya0vx h *vn the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where aod+q. m8bw:q-z vgu38g4 6sfcjy th*i uniform electric field is directed straight upward. What can be said concerning the chargiz48+b jtv cuf6s.3 -mqow8 :hqdy*gge on the block's top surface?

  If a conductor is in e9 s 1blxekcsl6 sk+3v:lectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphertv8kt/x) v/cr e that is grounded. As comparedvt8/ /v)xtkrc to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of co b f:x*r2cl*5 vww m3rllyg68tnductors in static equilibrium.

State Gauss's law.

  The charge carried by oneu ,bl7hmuamxq; 72 ejye+44m n 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 +2gng:k9 igu sddp*.s; *.00 mC. How many more protons than electrons does this pi*;gg gu*sidn dks9 :p.ece of plastic have?

  What is the charge on 1 kg of protonjy(8uz1 z;et/bym -yns?

  An atomic nucleus has a chary79ar0yhnyn/h e r91t5mb ,qkj25enb ge 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 -4.0x(y8aahtas9pj92z v+ l 5zw:f mC, respectively. What is the magnitude of the electric force bj98faat (v a hzp5w+z sy2x:9letween them?

  A 1.0-C charge is 15 m from a second cl;h1xbgej48g- i jma 5harge, and the force between them is 1.0 N. What is the magnitu8m-jj lgxbh5eg4 a1i ;de of the second charge?

  Two 1.0-C charges have aunfw h1:o*8 ff;gjb 7s+mtrh6 force between them of 1.0 N. How far apart are they?

  The force between a uvpa.u(*9kylsv5 cf lk(m1g 6$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi6f z 9ui,f ;ruccut (8fbtm2 ,w10uiqfence a 1.0-N force. If they are moved to a new8uicumr12i9fb6,q 0t ;w fczu,( ffut separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the8x2an) ( mc-xeihxvkiw+q3 t08i-dbt 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 magnitude and direction of the electrostatic fi- )bx(dh i8+08atemqtwk2vnc i x-x3 orce which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge o8gxq5 wx9xpid4bgg;o4 n+ yg0 f +2.0 mC is placed at the origin5qwn0yi+pxog; bxg4xgg8 d4 9 , -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 origin?

  Three point charges are located at the following positicz,k6nnu:e1y wd0v) ule+ sv 7ons: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -:d0e1)vvcw +zlsku7nn y,u6e1.00 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 square, and a vxmti08 xwd7. xoxb: ke 3y**gsecond 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 acts on the center charge if a third chargoy0e38**xg ix:km tb7xwx .vde of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC saq + bvlxt(cl4y*1gdxf * t86is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0*y(b*vg8 fll1tt d6 as4x+cqx nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 -*cocou b6 n9j= 5.0 nC is at (0, 0). What is the dic *9bjuo-ocn 6rection of the net force on the 5.0 nC charge?

  Three identical charge5 (igtqtdat+7ffib( ,eaqtm / (,d0zn1ci,lys of 3.0 mC are placed at the vertices of an equilateral triangle which measures 3ddfai 1im,bia5gt(cfe+(0,/ z ,tt(7tql q ny0 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are sepa2kiq 3pwu,,nr)0 gj syrated by 3.0 m. At what point, on a line between the two charges, would it be , s0gyw)j qki unp3,2rpossible 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 +9o)ob8 lxc b-im(ycuyh*4z im3; 4m5 rz0jhl)r.0-C charge is at x = 4.0 m. Where on the x-axis can a third chargbh(;r-blhmrozyujcx8i icy0 z )*44 3m)o5ml e be placed so the net force on it is zero?

  Charge +2q is placed at the origin and c3bmp mk xt+u9m+,g3h eharge -q is placed at x = 2a. Where can a third positive charge +u gme ,9m3p+mhbt3 kx+q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot srs;, z4ll8tjal 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 theoj 0xgfb ,8,r hwv8(dt attraction of a fixed proton some distance above it. How far above thehvjftd( 8,w0 bx ,r8og electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by no p)mc9c r8dlt.nconducting threads which are 30 cm long. Both are given identical ptrcm9dl c)8. 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 charkiz6v)zf s8si60d+z ar* 2nrhge of +40e. What is the magnitude of the electric field at a distance of 1.02*n6h+ skrfzzvsr0dz)8 i6a i m from the nucleus?

  What are the magnitude and direction tx pkv.7ey g,;of the electric field at a distance of 1.50 m fryt ve;.kg, px7om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small teste1c;c bulpsn66cny /nd 1 p8n, charge. What is the magnitude of the electric field at the locat pe6 p, nc/bcndyl;s 16nnu18cion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dir5z9dibnan 1,iag pe 6+y6qouzj h +w*0ection of the electric fiel6 1gd bqn,e 0zu+i pj+yi6 w5aohz*an9d?

  A 5.0-C charge is 10 m from a small test charge. Whag yzyxy 95;2alwtv 6:it is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test chl2w: 6g5y v9y yax;tizarge?

  Two point charges each have a value of 3.0 C and are separated by a distance xbk fswf frl- -0o3fkfh84; 0mof 4.0 m. What is the electric field at a point midway between x; 48mfwfsf-lhfo - bkk03rf0 the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chg28li/,ox3t-ucq pu *vrdil,arge is placed at the 50 cm mark. What is the elecip,dr q 3gox/*l 2v,ulc8t-ui tric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark oqv6oljtf(s sb x*8d3 2f a meter stick and a -4.0 mC charge is p 8q(*sfl3 ovb2s6 jtdxlaced at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC andbp 6w4kf8dk:) zsry1(n.wx au -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poi(n u6b1)k.wsfwzpr:yd a k48xnt midway between them?

  Three 3.0 mC charges are atvy i88/m, ge 2hgn(dau, qo1k9not4a w the three corners of a square of side 0.50 m. The last corner is occupied by a -3.(28g t,n8i dgq m,oheku9 ay1a4 wnvo/0 mC charge. Find the electric field at the center of the square.

  Consider a square whics:belqzxmh3j cpw 5yzi br23;(,jy ,(h is 1.0 m on a 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); -3.0 mC at (0, 1). What is the magnitude of thy p(2wy 3 b:5m(j rebljxqzc;3 zs,i,he 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 uy: z;pw.8wwlvniform electric field. What is the magnitudez;wp: wv.8ywl of this electric field?

  A particle with a chargb( w z:7 oa-; aifc.fzdp4bt*je of 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 wjlusq,d5/q7 db 7hk2in an electric field of 6000 N/C pointing downward. What c 77s2q5/kdldjq wh,buharge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ba f+ns zro-q*v0r ,u59bndphshl-i;3 xll is placed inside a uniform electric field, and is sus +oirhs,3u-*qsnb9 fp5n ldr;hx-zv0pended against the force 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 y)foouhfsjia i- 5v1ji)n yml, /-d*. is the magnitude of the elec5yj- i, )jsmyludv)ofi ai hf1.*no-/ tric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3 o 2v *j4)yyqvw/b;xnn.0 mC. What is the electric field 6.0 cm from theyo)4qxnnv*w2/ v j by; center of the sphere?