State the law of conser(f )aeykq/y1j 4x uc4nvation of electric charge.

  Is it possible for two negative charges to attract eax-jqyl+6kh8.2va b +wyjguk5ch other?

  Is it possible for a positive and a negative charge to attract each othel (:(ev dac:mc*j+o msr9aq+h r?

  A glass rod is rubbed with a piece of silk. During the procesf75m/p t*kbi2c,(o*b ax s fams the glass rod acquires a positive charge atif5xf*2 opbm b/mk7c *s ,a(and the silk

  A proton carries a

  The model of the atom sho2ntgpksa9 2erw;n )k *ws a

  A neutral atom always hmmcq3a(ov-py j 73l(pas

  An atom has more electrons than protons. The atq2j/ whzr34z /tvuy; :ix fch1om is

  Materials in which the electrons are bound very tightly to the nuclei are re f 3s ;tf4oci/8jpc-meferredcmo 83;pi/ tc-4es jff to as

  Materials in which the electrons are bound very loosely to the nuclei and can moh t6po dxt+0/eve about freely within the materialo p60tdxte/ +h are referred to as

  A negatively charged rod is brought near one e :(w9dbqbol7nx l4;tpcn+y- znd of an uncharged metal bar. The end of the metal bar farthest from the charged 7ylbplod wzb-:q t;+(4cx9nn rod will be charged

  Sphere A carries a net positive charge, and sphere B is netbr0r8k0l tp6;z6xpg utral. They are placed near each other on an insulated tabzrk 66gx rtb8pt l0;p0le. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chargu3,q qox :no9 unbfl,0e an electroscope positively?

  An originally neutral electroscope is briefly to.m50d rphmh6 zuched with a positively charged glash5pzd m rm0.6hs rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively cuu qafd2(lb0 b60wot* harged glass rod is held near it. After t(blab ut0q0d6* fouw2he glass rod is removed, the electroscope

  A positive object touches a neutral el vakciu.3 g+chv+ mdpi06 r*:qectroscope, and the leaves separate. Then a negative objev+ ir kmpga*vu3q c6.+h:c0idct is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged -j3 li+ z0g j1dvr9nkjobject is placed 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 foll- +1ji lj0zk93rdgnv jowed 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 Coulqai6e (yy7 a8mjchx 8)omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by au m +(p9 nc35q,*4vq v4yqkl wedi*npe distance d. The first charge is larger in magq* y34 *eni4pek mvd,5n u9cv(pl+qwqnitude than the second charge.

  Sphere A carries a net charge and sphe.cwp30y2oh sk m4pu ;ure B is neutral. They are placed near each other on an insulated table. Which st.2 upm cu4ok;p0hs3wyatement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges ono3rp41 0h wbgyjuy of 4dj6+9n both objects are doubled p36h +b j o4ndw0jygoy f4r91uwith no change in separation, the force between them

  Two charges are sepa zjp h8qfgex1),e(uw-rated by a distance d and exert mutual attractive forces of F on each other. If the charges are sepahxqzew-gpj( 1, fu8 )erated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forc5 x) d*au4w )7h wt3obpc6kxqke F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between thp 6 )ok )xah4b u7kxw3*cw5tdqeir centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separz g;hh/u a:faf6 60jo8lv0+okh-qh lkated 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 u /lv:h0k0f a 86-fhoqkal6+o;gzhhjthe first electron?

  An electron and a proton arinl e4,ips 5ce3, gdl;e separated by a distance of 1.0 m. What happens to the magnitude l;l ,g53die s,cie p4nof the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are sep7jmf.o c+a wk0arated by a distance of 1.0 m. What happens to t7c.o+am0k jwfhe size of the 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 f)uxgg*t :;qp 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 pos;q ftx*g:pg u)itive 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 the centroid of an el:)za -1x lba(cr9ig ruo7e*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 thirdelo)a- a 17 (gu9r*:rzcl iexb charge of +Q placed at one of the other vertices?

  Which of the following is nof lcrkoo58ft5vgciy.2( 7, mvt a vector?

  At twice the distance from a point charge, the strenb9pwgqc a+(/ny )yi8ngth of the electric field

  Is it possible to have a zero elecsh4j : 5z3zeh0 tqi8nmtric field value between a negative and positive charge along the line joining the two charges5nzqj m0itsh8:he4 z 3?

  Is it possible to have a zero electric field valui)zt6+ku sw: de between two positive charges along the line joining the two charges?ui6ks zd+:t)w

  Electric field lines near psitive pk va(0rza;,eaih5iwj4 8 x6 ;oys( lepoint charges

  The electric field shobq6 mg09q vgy)wn

  Can electric field lines intersect in fre 3 nq*4zdyf he5x:;:8z lavxlre space?

  A solid block of metal in electrostatic equilibrium is plb5 /p7trm t3+kw*lxe raced in a uniform electric field. Give p7r+x e3r5bkttl/ wm*a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equn psvt6t40p )nal diameters are each given the same charge, the electric field (E) midway between the center and the su0ttspp 4)nv n6rface is

  A cubic block of aluminum rests on a wooden table in a reg;bb ;jg c p(o6.h:b8lv qqov2i.a7pmmion where a uniform electric field is directed straight upward. What can be said concerning the charqo.; i jb6vbpq ah7mc.lo8mbp:(;2 gvge on the block's top surface?

  If a conductor is in electrostatic equilibriummb 2 s4 -(kxeurjbc8e. near an electric charge

  A positive point charge is enclosed in a hollow metallic sph6osxa sho 7 sxogcex0;i74jn/vr*t.9 :ymwv8ere that is grounded. As compared to the case without the hollow sphere, th vs9ooyr77se.nx/4imx8 w6g*ahov:tx 0jcs ; e electric field at a point directly above the hollow sphere has

State three properties of cont na1bo+-m/ kr9n7 egaductors in static equilibrium.

State Gauss's law.

  The charge carried by one electriw:j5e eoym2 ,on 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 protonv3fq7n7sq gk/qs pj-yd,l8-us than electronvdkqu7g/q8-,yln7 j sq- ps3fs does this piece of plastic have?

  What is the charge on 1 kg of pyb* bj0( /rvwjrotons?

  An atomic nucleus has a4 l 0ejfd5cx/n charge 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 valueaytr4 buevi;odt:+f/y09 ;q-clu 3 vz s of 2.0 and -4.0 mC, respectively. What is the magnitude of theq l v9yoif3r-bz0 ;;4uc/tetyud +av: electric force between them?

  A 1.0-C charge is 15 m froq1.*n)uo efuf m a second charge, and the force between them is 1.0 N. What is the magnitude of uu)n.e*1qf fothe second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apa*yyb889mn s wl7a qhg/rt are they?

  The force between a ft )5faf fca:f+n7t1 -rxke,b $30 \; mC$ 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 f. *dt1. 9rxu akg*bo.gs*npm gorce. If they are moved to a new separation of 8.0 cm, what is t a.ngx*td1uob.sk *pgr.m 9*ghe electric force between them?

  Three identical point charges okhp0 o3:ysgl* f 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the l*03p: ksg yhoright 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 cj +nxan0ay( ,09yc+i mkj3ytg harge 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 the electrostatic force which acts on the charge at the or+, nxaj0c0ji+y yka (mtn 9y3gigin?

  Three point charges are located at the following posik zx:6t 4.mky6p4b ym5pz,gbhtions: 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. What is the magnitude of the fg,:kxy.mh pyt b6p4b6k4 zm5zorce on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second poino yd +letdtd(8 vcx-nx2/,* ott 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 m d/2ctxe,t(tnv + yxdlo-8*doagnitude 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);odpt 7 w)v(u;z ztm,c(ati,d9 Q3 = 5.0 nC is at (0, 0). What is tmt9top,() ctd;v(zdawz iu,7he magnitude 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 07ah0 2q.fn) hegmcefnC is at (0, 0). What is the direction of the net force on )eg0 hha c.f2qemfn70the 5.0 nC charge?

  Three identical charges of 3.0 mC are plac((je2v4o t-rvo9u ahbed at the vertices of an equilateral triangle which measures 30 cm on a sid2(9 vro-ou ej4h(t vabe. 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 sep 1b l9b5alo(vlarated 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 f llb9b(ola5 v1orce acting on it would be zero?

  A +3.0-C charge is at thetur 2ttne2arnaf u7 /*tjq1mqlj04)3 origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net fnaq)l3/en2jt j2mqr u7rut t410* taforce on it is zero?

  Charge +2q is placed at the origin andn 6cqx:2m xt-z charge -q is placed at x = 2a. Where can a third positive ctqnzmc26:x x- harge +q be placed so that the force on it is zero?

  A copper penny has a ,s:;8 9z iw.ddk)pfd pmx,eermass 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 attraction of a b-h(yygx2u6 qfixed proton some distance above it. How far above the electron is the pry62uyh qxb- g(oton?

  Two 0.20-g metal spheres are hung from a common po wlyi s/g0o57tint by nonconducting threads which are 30 cm long. Both are given i0tol/yw75si g dentical 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 charge of +40e. What is the magnitude of the electric ujgk;.uf,; 0rty5nngfieldyk;g;, g.uut0nfjr5 n at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at db znrac- k .21cql0cka/6+ab a distance of 1.50 m from a 50a.br01 nkqk zdbc+a 2a/- lcc6.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. Whatnvk2j 58pl rsepf+ r6(,mhtc; is the magnitude of the electric field amh;je5c rfl2nvp s+k( 6tpr 8,t the location of the test charge?

  A 5.0-C charge is 10 m from a small test chan:l9k fjpplm+83jg f7rge. What is the direction of the e +mjfpg: f73pk9lj8l nlectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitud -7vqp1l4awgv 2exj 1p2ryzi *yg8) dre of the force experienced by a 1.0 nC vx7parl4q2p1egd -z1yw 2r j y8 v)ig*charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C ands g9i;1hmiguf;8h.fedl cm+ g;l )o6or1hw8u are separated by a distance of 4.0 m. What is the electric field at a point midway between the two chargfeo+;gluim68.hho1 9r)1igwgsfdh;cl 8 ; umes?

  A 5.0-mC charge is placed at the 0 cm mark of a meter vl9 meb2b5 e8mgx;4ua stick and a -4.0 mC charge is placed at the 50 cm maxbb; 5am4u2e e8l m9vgrk. 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 an :f6l 4thkf,xp 0pjz4td a -4.0 mC charge is placed at the 50 cm mark. At what pointt lpxh6f:t, fzp4k0j4 on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = mubw j9c2)i*tuf4a,f 0.20 m. What iw, * )42jucfumaf9itbs the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners opw xmw s:-u;c/f a square of side 0.50 m. The last- cpu ;x/m:wsw corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are pla vs v9nm)6wg+fced at the corners of f9 6v w+nv)gsmthe 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 0)n7glm: 6 j+zv f/vhhxkf2 nh2nmjw6on a charge of 5.0 mC when it is placed in a uniform electric field. f62mhznlkjfx hn:jvv+gn7) 0 /2hm6w What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of hlp8u+ h*eq) b figf.k08 spl*$5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0:n0p+n wk kjsu)j/d3h .120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placedw) ju3j:+p 0snn/kh kd on the ball for it to be suspended?

  A foam ball of mass 0.150 g)ipcrx r9o w5af:(k3g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are th(3 a 5xrripfc):gkw 9oe magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.b phm alc5+rfb .dy 4,uh2.tg50 mC. What is the magnitude of the electric field 525d,t +gr5hhb4.a mblf upc.y.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a cha 4tyx8p zqqw+.y42fxe rge of 3.0 mC. What is the electric field 6.0 cm from the center eq4x.wt 2 f48+ ypyqzxof the sphere?