State the law of connjx-. h6wbld:yv, ) rgservation of electric charge.

  Is it possible for two negative c +)*rvk/gpnhlharges to attract each other?

  Is it possible for a positive and a negative charge to attract eanwky .x+y4 x-tch other?

  A glass rod is rubbed withdi)* vq jj5yp0 kov39l a piece of silk. During the process the glass rod ac)k*d93o j 05vjpyqilvquires a positive charge and the silk

  A proton carries a

  The model of the atom syj2j(n (9h s) wmfka,bhows a

  A neutral atom always has7e /fqx9g:jrk

  An atom has more electronf23,k1q+n d /uvf qrsmx v(3ftddp-1bs than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referrt:w8inelk190/od tea: 2wwutp 8l y5f ed tow: tne08f/l2aptdw lyi ue9k8:o 5tw1 as

  Materials in which the electrons are bound very loosely to the nuclei aivh:c-3l74obz oyf7+az )k5 98dfnbe obx0 i nnd can move about freely within the mz3b7b) i -dni587 eoxolon+c :bh4f9fay 0kzvaterial are referred to as

  A negatively charged rod is brought near v9f-n a(fg pca m4wco -/pg6r/-8 hldz3f9nmbone end of an uncharged metal bar. The end of the metal bar farthest from the 9p3 -pf9/n haro6 c fg8-gadmnlvw/(cb-fm4 zcharged rod will be charged

  Sphere A carries a net n /vlj97p.pj fpositive 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 statemenp7vjjlp9/ .nf t is correct?

  How can a negatively charged rod charge an edeu /22yvm gml:q*:io lectroscope positively?

  An originally neutral electroscope is briefly touched with a pos /w9n iypwmn 8w-si)m/itively charged glass rod. 9m/wsiiww np-8)/m n yThe electroscope

  An originally neutral electroscope is grounded briefly while a poi-d .s7t6 kpd *;+f z);hx*qbai3gp 9q nekvupsitively charged glass rod is held near it. After the glassf)7q zpqbi;6ektp *u xvpgid k ;s+3.-a9n* hd rod is removed, the electroscope

  A positive object touches a neutral electroscopeoc3 0kn, ,wrlxjdv/ ;oasv9 us7d g3q3, and the leaves separate. Then a negative object is brought near theokgn,dsvra,739jv0 3w/sq d; 3u cx ol electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. jgz dr0)w dm(/p8yg1s 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. The first ball rolls dg0 1mzgwjrps(d)/8y 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 C 5aa .( 35;8xbqpof ;gg (whj7zwcqdgmoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a disvbdf- 7qq- ar.tance d. The first charge is larger iv-7q.afdrbq -n magnitude than the second charge.

  Sphere A carries a net charge and sphere B is ne-4 ty4d:rjoreutral. They are placed near each other on an insula4 yo-t4:erjd rted table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain n7wzyziz c-o2*21vyh 4 +q r5i rw(bjoforce. If the charges on both objects are doubled with 2ihi 5*yr7c4(bq oron2v-y+zz1jwz wno change in separation, the force between them

  Two charges are separated by a dis (e b-wau0b 4y*fjaom1tance d and exert mutual attractive forces of F on each other. Iafbme 1-w0b(4yj a o*uf the charges 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 to the ,aol9s8j0e c4tje v:qforce between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth it8qe tlo04ea:,cs vjj9s original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. qvu(sd5.ehg +ob7 6ob What happens to the magnitude of the force on the protonudq .oebb ov7 5+g6(sh if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dispz/:htj)i k-an,z+c btance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed t:kph/j)i n za,bc-+z next to the proton?

  An electron and a proton are separated by a d,didl:0 :kcuhistance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closu :c 0ldh,:kdier to the proton?

  A point charge of +Q is placed at the center of a squay*w1zfn joidn-r- .lg;ax 60 fre. 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 is the magnitude of the net electrostatic force acting on tw .lgjna--1y 6r*nzdof f;0xihe positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral tria9pbds0m1t i7q ngle. When a second charge of +Q is placed at one of the triangle's vertices, an electrosta7qb0td p ism19tic 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 vecn,26i;c dto /yfrmx :qtor?

  At twice the distance fro4,xg:vft3if6 a s4w iam a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a nega*/p xo5-)m poahfrrm,tive and positive charge along the line joinio5 rfo*pha )m/xrm -p,ng the two charges?

  Is it possible to have a zero electric field value between two po9zj)qfb*be6hce kc ,* sitive charges *bbe* )qke9hj ,6fcc zalong the line joining the two charges?

  Electric field lines near psitive point charg1mpgk 2p5jb enu*q r-0o2 ea9ies

  The electric field sht)mxcc;,v iqunb i5c i0m-i+ 9own

  Can electric field lines intersect in free space?et/ uil r57ke+

  A solid block of metal in electrostatic equilibrium is pl2;mij)4-za o6 buforms -ie2maced in a uniform electrioz6 2-uirm o i)fe-4; abmjsm2c field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hol2jqy17fd79o -jr3j2k qp k kqplow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center an k 93jrq-p2j2o1q7qpy7 d fkjkd the surface is

  A cubic block of aluminum rests on a wooden t/krx+35o8(vdrj dtgyjl+p 1 table in a region where a uniform electric field is directed straight upward. What can be said concerrttdod8y 3xkjv/15+j+gpl(r ning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrifbiw;c; 3 :zekum near an electric charge

  A positive point charge is enclosed in a hollow metall rtt6it z*/c*+gnb )(n9cj48ougyle bic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a b*g(i9*ou jbt cl 86gc4)t/ezyn +rntpoint directly above the hollow sphere has

State three properties of conductorp.)d :;kgh wjxs in static equilibrium.

State Gauss's law.

  The charge carried by one electron is -6ecjuswyx )9bll/g4 $e = -1.6 \times 10^{-19} \; C$. 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 5z4nup-z 0y(s+w i*r 4d hygvrmC. How many more protons than electrons does gzv-w 5hupzs y*(4ir yr4dn+0this piece of plastic have?

  What is the charge on 1y h50(vu0e; 0zdawqq f8y9u hx kg of protons?

  An atomic nucleus has a charge ofad(3mu7m, o qc $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sep1u vudv)vv(un h6h7k 1arated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force vu1 6v hvn17)vkd(huubetween them?

  A 1.0-C charge is 15 m from a second chargex 7vxfphlr:b qdv3k 1eqzqhj, 2 6*k);, and the force between them is 1.0 N. What is the magnitude jevq21: rxfl hp) kkbq vdh3,;z*6xq7 of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. H: )3o b:uxwejxx9nj( how far apart are they?

  The force between a 5ht hpprx;x/:e/x )h e 0nenp4$30 \; mC$ 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.+ r2o5lcpin9s If they are moved tc i+l925 pnrsoo a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.9ppj9m-n*l un 0 mC are placed on the 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 force which acts on the charge at the orim9lju9 * pn-npgin?

  Three point charges are placed on the x-axis. A charge of js + nrj*wz4w.+2.0 mC is placed at the origin, -2.0 m C to the rightnwz.js+wj* r4 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 look7dn8zghi1k34,i j*k r uu lkvy1 p-1cated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. -11v3lnku 8*khpjd47zo kku gi i1,ry 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 poin 60(bk7,3hob bluzbj lt charge of -Q b3o(bbu,lj b06zkl7his 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 charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC e(3h 8 vanz;js30me/x2i zs)cl zdyl8is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magni)0z 8 zild xae/jm3v(s; sln2c3ye z8htude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 aw7:x58. v9jqqny uk1l isr;gnC is at (0, 0). What is the r8 v;9nj is uqla71ykg5:wqx.direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an eq,jd xj852 csexuilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on asx2 cjj85,dexny one of the charges?

  Consider point charges of +Q and +4Q, iwl.ce ubhhj5;+ 5c 7lwhich are separated 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 w; i5bu+jh57e. clch lwould be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. Whetl wi iey3 yl;c1i;h-qem 0uci8wp.4f k(s2i)re on the x-axis can a third charge sqi(lke;f ccwpyl wi-hm)it;1 y28iue3 0i .4be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q i3- p)ochmp ;kljx uf7r e4d;(ls placed at x = 2a. Where can a third positive charge +q be placed so that the )4lj 3hcmkferd pu p;o;x-l( 7force on it is zero?

  A copper penny has a mass of 3.0 g. A total j:zrn9 dnv+mj+la 09gjh2x6 /afmw4xof $4.0 \times 10^{12} \; electrons$ 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 uppu se 44fkcd5u c2*,yr against the force of gravity by the attraction of a fixed proton some distance above it. ,5c2*s dyufec4k4r up How far above the electron is the proton?

  Two 0.20-g metal spheres are hun+x p3 .ad,a st*qd9 l5toto13xcf2iubg from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angpua. o1d at3 fxcitbd2lt5 ox9+q,*s3le 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 magnitudg03u h;gghc/ de of the electric field at a distance of 1.0 m from the ch0/u gg ;hg3dnucleus?

  What are the magnitude and direction of the electric field at a disgq)8)grkb9s4der vk 2tance of 1.50 m fr8 9g4 edk)skrvrq2 gb)om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What (ww6eq zpo yxr9cl3 /*is the magnitude of the electric field at the location 3l* /qy6 wc(owpzxe 9rof the test charge?

  A 5.0-C charge is 10 m fr7qhpr 2)mp v 2ehn*5kd5pebe9q7r8bvom a small test charge. What is the direction of the electric field?*2neqb)bmvhpkrd7 2v78er5php e 5q9

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of t-ll/( .7 nw uj)jurmybjs4rus r a:;d6he force exper; jy(ws:4rs7md nl-/bu6 uuj)rl.r jaienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each ge. f28zb-in nhave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the twzb n. 8f2ie-gno charges?

  A 5.0-mC charge is placed at thy n62ic p.bmvigcm d58a5 n ekgs*;0h,e 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 at the 30 cm mark?dib yvie*n,n8macs55 k6hg0p 2. ;mgc

  A 5.0-mC charge is placed at the 0 cm mark of a metxnzq ek s c7zr;6p;7nn49q bt2er stick and a -4.0 mC charge is placed at the 50 cm mark n ex ;b9rstqzz knp6;4q72c7n. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are pl2qqdea9gd/x6 : 07ji2i erwstaced at x = 0 and x = 0.20 m. What is the magnitudeq2er:ig/adxi 7swet629jd 0q of the electric field at the point midway between them?

  Three 3.0 mC charges are at 0xtijg, j(va bz s.l/8the three 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 of .s,l0iv z xg/ajj8t (bthe square.

  Consider a square which is 1.0 m on a side. v jqoc q8 mym/cn9cim13z9(k5 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). (9m c3cnom 8yvqim/9z cjq15k 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 ww v*,4vp- k1vv fxut-k v4xv+rhen it is placed in a uniform electric field. What is the magnitude f+- k4v-xxuwtv1p v*v,v 4rvkof this electric field?

  A particle with a charge of 4.0 mC h.x; wz ekq8s8wze6* cbcwgz ;+(l7iwhas 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 field of 6000 N/(uxfxob 06u,xmfr+ 2o b2sg.yC pointing downward. What charge must be placed on the baloufrg y(s02,uo f 2xb+xb. 6mxl for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.sxv4hft *c(y 500 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude fh*x5t (cv4ysand direction of the electric field?

  A metal sphere of radius 10 cm carries a fp e (kg)a9sy-j5 jb8j ahk/g:charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from a5(/ga8kk) h efb9s :p-yjjjgthe sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is tha*kxgl p87,b :+eixrb2v xi ,pe electric field 6.0 c b 27x:v,ixb pxie*lk,r p8ag+m from the center of the sphere?