State the law of conservat/ tbaw*rt+qp06m s(nzion of electric charge.

  Is it possible for two negative charges to attract e-6rfskp,6mp09c7 7xhkmfwb v ach other?

  Is it possible for a positive and a n .cn*ssn7 uq3aegative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the :hshx, j1y4v4p qz/ctijjfv() 6y qj1 glass rod acquires a positive charg hxj:cj,4/ypti)h fqy4zs 11q(j6j vve and the silk

  A proton carries a

  The model of the atom shnr0of-iy u,5a;8z ,o+gh*c .ker eja uows a

  A neutral atom always hay -xyk28m uqz3n p gqk;l6o1x.s

  An atom has more electtj:oizfd; pyj :jb8 ,2rons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are r dki5cj.mg 2ov *bxi;(eferred to5gjv(mo ikd x. *2ic;b as

  Materials in which the electrons are bound very loosely tob- 5rc zldz(,n1wik a/ the nuclei and can movi (5l 1 dabkr,/cz-wnze about freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal 1p;hsru6txnnz: arl)l- 9b n- bar. The end of the metal bar farthest from the charged rzan rursn69 b1hlt;p x-- nl):od will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are place6,bd) bgy-w sfd near each other on an insulated table. Sphere B is briefly touched with a wire that isb,d)w6gb- sfy grounded. Which statement is correct?

  How can a negatively charged rod chanbr *o ,ql(z c)8;qnnxrge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivq :uo9.fgtquh88u9ct ely charged glass rod. The qtghuo f 8c8:9utu.9qelectroscope

  An originally neutral electroscope is grounded briefly while a positively ch emw-ak55 a1gc 2m; qyj.vrma+arged glass r- m gvky.15q +2 m5aaw;acmjerod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral elqz63ptg y;/8qcz z1s fectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but fzzgsz; yqqc186t/ p 3does not touch it. What happens to the leaves?

  A large negatively charged object is placedjyx(gx m2bkt/z94a)r,t -vtb5o:-woe im v7 m 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. Th )5 ktr,b(gtayj zv itb9emx x2:o--wv 74omm/e 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 cu;lciq1 + gj/rypv 9/)ty9f sbonstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fi*d j4xq e7d tdu0pf7g-rst charge is larger in max0uq *7g p7ed 4-fjtddgnitude than the second charge.

  Sphere A carries a n( yiiysm ;yq.4et charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best (i;qyi ms4yy. describes the electrostatic force between them?

  Two charged objects attract e0f. 1jnb+g4cj,(.eeianw kohq*. gx xach other with a certain force. If the charges on both objects are doub *hjx(q0o+n4fw x. bg, je. cgiea1.knled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fo6)uio 0lips/5 yd)oworces of F on each other. If the charges are separated by a distance of d/3, what oilywsd)) 5u6ip /o0oare the new mutual forces?

  Two charged objects attr9 sek+5t7div7cd6 ij 2el(dax)e e 8yract each other with a force 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 its 9 k)vd6 5se7( i8irdc2ad7txe+elejyoriginal value? The force is now equal to

  An electron and a proton ar ) o9i0rq x8hm10iyqjqm (k/fse separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second elect qq oh9/0)f0qmi8rix kymj1s(ron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to,o8lrwes 69pj2lj /g x the magnitude of the force on the first el/wsgpl6o 98r ej, j2lxectron if a second electron is placed next to the proton?

  An electron and a proton are separated 9omao2.n51kk hn0 tkg8( slu- uru 7yeby a distance of 1.0 m. What happens to the size of the force on the protonsku-o u7.0r(5ym2enguh k8 tl9k 1aon 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. When56lfma z ))z xcppg3i;cxqkka2 l2m)) 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 is the magnitude of the net electrostatic force acting on the positive cxaz2k )qaf)6l3gl k ))mip5z;2x cpmcharge at the center of the square?

  A point charge of +Q is placed at the cen q/uib* t4m:-w6+x gym5kupzn troid 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 plt g4 mkpw:m uxbn uq+y*/iz65-aced at one of the other vertices?

  Which of the following is9dz 4u:6kbven not a vector?

  At twice the distance from a point charge, tf.1+ 5qhuuu9j8dwu ki he strength of the electric field

  Is it possible to have a zero electric field value between a negadt6fbqvvaj zv a.(eh+5fedw8; oc1 /;tive and positive charge along the line joining dav8/vo5q 1hfz +t;6awj ; dbvf.(e cethe two charges?

  Is it possible to have a zero electric field i icl-gn d dm:2m**-tlvalue between two positive charges along :-m ml*-tdig cild2*n the line joining the two charges?

  Electric field lines near psitive point 9wrss+lc w.vn1 y4c cpq0f7i*charges

  The electric field s+bf,rs afvs9 y8 m5p86-gq wfshown

  Can electric field lines inters4vml 0ex ,r./i ,pycqrect in free space?

  A solid block of metal in electr2mpyhsnw;:y tl*i;l;nzed 23 ostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interidpt l;*2y2 n:nzle 3h i;;smwyor.

  If a solid metal sphere and a hollow metal sphere of equal divg)fi1 we2.w k)q/d ynameters are each given the same charge, the electric field (E) midway between the center f1)vq /ydw2 w ik.nge)and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifora.t- :f.lcax;tm 6/*yrx u jozm electric field is directed straight upward. What can be said concerning the cay6. ./ *tr xxl:m;fu zcaj-toharge on the block's top surface?

  If a conductor is in electrostatic eq0;kccbe/:e x luilibrium near an electric charge

  A positive point charge is enclosed in a hollow mfko4. k-mhq(,td-5e2h8kqown /izf eetallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point dirif24.5 eh de(m f-,hwq/onkkt 8q ko-zectly above the hollow sphere has

State three properties of conductors in static eufn, d j7incy29 u+2qvquilibrium.

State Gauss's law.

  The charge carried by one elecph ejz;,- wd)jhtpn,k22 zfx-5n 5r aitron 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 protr9x(uap 78 rt-ymzl6uons than electrons does this piemyr(6z79-uptr8 ul xace of plastic have?

  What is the charge on 1 kg of protonsq:j+ il2u.p ,d.qipfu?

  An atomic nucleus has a chac 77qvhxp)7+ ur+yfpz rge 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 value:gps r ,22z xm3yzpt.vs of 2.0 and -4.0 mC, respectively. What is the magnitude of th v, tzyprg3 2p.mx:z2se electric force between them?

  A 1.0-C charge is 15 m from a second charge, a/j 6ej:)t6 ny4hk jizs7ibv6fnd the force between them is 1.0 N. What is the 6f:b7/ n je6jhs t)6iv kiyzj4magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they?ktw5mten( m0h o5i 8t.

  The force between a pv.1h56o xfn5rvei j 4$30 \; mC$ 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.ans 0:7 ;mu: iowklsf) If they are moved to a new separation of 8.0 cm, what is the electric force between) mki0nauw;f o:ss:l7 them?

  Three identical point charges of 2.0 mC are placed on the x-axis. 1r 7le0p0b4jxsdsw4 ) ekncqy.( jn y3The first charge is at the origin, the second to the right at x = 5k(3l yr0 .ncwbxpnd ejys0 s 14)47jqe0 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-ax kqy5ob *i64av)qcl s/is. 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 q45*oqbl)ay kis6vc/ the electrostatic force which acts on the charge at the origin?

  Three point charges are located at theh)xb: jvi v.*i vb,,ct following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC ahbvjb vvic*i: . ,,tx)t 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 square, and a second point cha9w3i-de+iukaj -wx *yrge of -Q is placed at the upper-left corner. It is observed thd9+ wxe -u*ijwa-k3 iyat 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 charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 y2qi( /cfe 7af9w3uxzo s3jb* = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force onjo /2x( 9* fbyziea3swq c7fu3 the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.(j(h ee xuc+n;8ll.w v10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on +wx encuev (l(8;.jlhthe 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verttq,w ;w.2ta-u oakq- z3z/v bnices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the eq/3ntt2azk.;zvwu b -a, wo q-lectrostatic force which acts on any one of the charges?

  Consider point charges of +Q anthc968 jyv5wl4n k*elz8c+ krd +4Q, which are separated by 3.0 m. At what point, on a line4t lk lcy+h6 8kcw59 vznjr*8e between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at tht/(1 t;0m v0sfcrgtg se origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be pla0(/ sg0cs f1rttm g;tvced so the net force on it is zero?

  Charge +2q is placed at the origin andnk p15tv9 +bpk charge -q is placed at x = 2a. Where can a third popv95 +t1bkkpn sitive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. Ad eo9i5az0q s-m)cs3w 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)a2jqejnw(s kk7 2 2yc the force of gravity by the attraction of a fixed proton some distance above it. How far above the el7) 2y2e j(kcajwk qn2sectron is the proton?

  Two 0.20-g metal spheres are hung from a common point by- obr+hct ys0q15)9*jq99gg khudg jn nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic)+qsbtundo5k9- 9y0g*1 q hjj9hggcr 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 ma gdd4+45vgmopgnitude of the electric fieldggd4o v4mp 5d+ at a distance of 1.0 m from the nucleus?

  What are the magnitude and dir lr.2-u8m gh *ucamc;dection of the electric field at a distance of 1.50 m from a 50.0-. ac*g8mlrdu;hu2m -c nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnix+h:lhs c5n4lh /qx (ntude of the electric fieldh:c/nx45hl(sl hnq+x at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of(oj tuvb8vg )z6 (9tf2qme4gh the electric v(t9g2z gv htbj(u8f qo6)e4mfield?

  A 5.0-C charge is 10 m from a small test charge. What is the *kgo6jiy2 c;zmagnitude of the force experienced by a 1.0 nC charge plac2*o6ycij gzk ;ed at the location of the test charge?

  Two point charges each have a value of 3.0 C and arh jjggy *o+1nw:t5cd (e separated by a distance of gyhgj*5n :wdtj+(co 14.0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed hq 4l+(*ubm nu/r w:bum17ky hat 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 field wmu1q 4hn (r/7kbyh:+ ubm*lu at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a ,uf7k; lck, *ruuf g+w-4.0 mC charge is placed at the 50 cm mark. At what p;uku+k,rug, w lff7c* oint on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC ane) 0qq-n8augnn +g.dccyhie 83.a-yt d -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwa)ynycaq0-c+ega..u- 3t niqeg8h8nd y between them?

  Three 3.0 mC charges are at the threb06zi* ynd6cw r q;t6(weh,zne corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the e 6q(nwh b*6d6c;nyztzi, er w0lectric field at the center of the square.

  Consider a square which irfndz6 3lzc /mmby/ggj4)f5 8 s 1.0 m on a side. Charges are placed at the corners of the squarenl4zgcr8b df/) ygz /j5fm6m3 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 placed in a unifylg x sw+.b1u4orm electric field. What is the magnitude of this electric field?u+lg1b4w. ysx

  A particle with a charge ofd . i+2.y3c0z/a itbnjcznijk0x+pfoey- 07r 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 in)n.myom1g,y8a og w8d an electric field of 6000 N/C pointing downwarw 8.go dyo1)m ygn8,amd. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g wcf5 q 4js9nf-carries a charge of -2.00 nC. The ball is placed inside a un 5nfj9fq -4swciform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a cc 1dqph-rb+d2harge of +2.0 mC. What is the magnitude of the electric field 5.0 rd - hd1b2qcp+cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What isynv00x hgo:d5)v qq 1p the electric field 6.0 cm from the center of th v1 :v)h q0gd0nxq5oype sphere?