State the law of conservation of electric char- k d ,l9:f2ljnbkobs1ge.

  Is it possible for tw: cawagfd8 )s2o negative charges to attract each other?

  Is it possible for a positive *4 r3;5trqtjr f pth7zand a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During thp(b(3o 7kt,6t lzn g 04rusikpgz5zv:e process the glass rod acquires a positive charge andp7v5osti6, p r0( gultbn :g3zzk( 4zk the silk

  A proton carries a

  The model of the atom sid gk7qnpz/1/ b rj+e.hows a

  A neutral atom alwaysxw+ 1rmd8 f0jr has

  An atom has more electrons th3,b)p a 0ylpckan protons. The atom is

  Materials in which the electrons are bound ; nb1dbbg8ck9very tightly to the nuclei are referr 8b9b1;dgcknbed to as

  Materials in which the electrons are bound *xelf i;16, *a i-:d xxwfythvxh;-bb2fdx5j very loosely to the nuclei and can move about freely within ti xxdhx2d-vf x;eiw :-*ty*b,l5b6 j xaff h1;he material are referred to as

  A negatively charged rod is brought near one end of an uncharged aqr 9+c *edp,mmetal bar. The end of the metal b q+ 9crdp,a*mear farthest from the charged rod will be charged

  Sphere A carries a net posil2k *d i0tavs1)xtyn5tive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphekt2ixy) *0l tnsvad51 re B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electron 1or*6on ffu3zmsq30 scope positively?

  An originally neutral el8 )sb(bb-cn0h hd llp+ectroscope is briefly touched with a positively charged glass ro -lnbh)+ hlpc0bdsb(8 d. The electroscope

  An originally neutral e qw( lmzi)x:b2y;9v xwx4jv.hlectroscope is grounded briefly while a positively charged glass rod is held vm.j4w (bqxivy:xz9 l;h2) xwnear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral elk+brs-7 kqh- 56 qf1q4kon neuectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What56o7- n4fqbnkhsq1 k+- qukre happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral s1cndwjeg 7 (3metallic 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 forward, but does not touch the negative object. At no time does either ball touch the negative oc1w37(j nsedgbject. What is the final charge on each ball?

  Charge is

  What are the units of t:2 srgicp13bk8(uc bwhe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is lafd5)j7m e4lyhrger in magnitude than y mf7d4j hl5e)the second charge.

  Sphere A carries a net charge and sphere B is nxk5 (9n xva (vqmmm17lg-bg8u eutral. They are placed near each oth-qvm (7 g89gakxn(v1l b 5xmumer on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attr+ e1iouuugoq73.jc0zb g0igi;r00a f act each other with a certain force. If the charges on both objects are doubled wigjuu1i bzr0o af+iog 00iu c;e. 307gqth no change in separation, the force between them

  Two charges are separated by a distance d and exertjn8k.jz +( cb0 g/ooqm mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutualoc m0n8+o g.z(bqjkj/ forces?

  Two charged objects attract each other with a force F. Wha/l mnxj;11pwot happens to the force between them if one charge is doubled, the other char/ponj;lw 1 xm1ge is tripled, and the 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 by a distance of 1.0 m. What(2 k8:getd7 u.orupgi happens to the magnitude of the force on the proton if a gi2p.uu:g7e(kdto8 r second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What 0vlxh/q :x46ud2aqt y happens to the magnitude of the force on the first electron if a second electron is placed nexdty4xx/62 v 0qluqah:t to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happent;mzsv3uz9 e /g/wg, fxqv g6:s to the size of the force on the proton if the electron is moved:3 tfzsmzg9qvgue w/6v/xg ;, 0.50 m closer to the proton?

  A point charge of +Q is placed at the center ot o6 a6/xdyg+df 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 is the magnitude of the net electrostatic force acting onog +6da xdy6t/ the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilo4z fchg yb)fn 6pi47ct2vc- *ateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrost-2n gtfi7c4 fcb *hy4cpz 6v)oatic 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 i3ex; xbl1ltpnq/ .x4g s not a vector?

  At twice the distance from a point cha3 o*/bs(.or hvasfzbus 9c5+crge, the strength of the electric field

  Is it possible to hanx1r /5md6bz7yux x. 1g u2bbbve a zero electric field value between a negative and positive chargz1y bu xb7x.r5 n6b2mbgu/d 1xe along the line joining the two charges?

  Is it possible to have a zero electric field val )jm sv7x1w +3 9xtf.l4/kjbcolukh 5mue between two positive charges along the line joininh5wmc7jbkv l + fm.)o1x4k 93ltx/j sug the two charges?

  Electric field lines near psitive poinf)j; ks )xge2rt charges

  The electric field soyd +4 j8l/dghi.z xe50q yp+rhown

  Can electric field lines intersect in k*h45 i2eruh:3 f mwlt8qd td-free space?

  A solid block of metal in electrostatic equilibrium is placed in p (80;uv:4gj ,uhd n qzyipe+sa uniform electric field. Give a statement concer;zhys4(e,vp:+dg8n ip0 quujning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal s/by-vt670mv07*lh bmyaua hc phere of equal diameters are each given the same charge, hb7my 0vhubt -ym6cvl*a70/a the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table inh uit:r bei* d na+.gvd+: lu;9:tfsw7 a region where a uniform electric field is dihr b*: +d9gi+e i:uv7s.:dnf wtl;uatrected straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in elucuplry:ck6p c5/yo(p/5 94u:ummbiectrostatic equilibrium near an electric charge

  A positive point chargebznxk43p8 z2wrmzn,/s h( s4i is enclosed in a hollow metallic sphere that is grounded. As compared to the cmb zr n4z,2nwsspix(/h zk438ase without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in sfgti5b5ue:c3y9 *z:eo ml f8wtatic equilibrium.

State Gauss's law.

  The charge carried by one electrob1p(jt*.1whcz 4m4c(cvnbh p n 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 +2.0wegh bm.2o*1sjlen k6l* tu +90 mC. How many more protons than electrons does this pu1ems b2.* k tj6 neglwolh+9*iece of plastic have?

  What is the charge on 1 kg ofb,wew +4zr/t /kzm o*f protons?

  An atomic nucleus has a charge ofcy(izdznm1-:q)lc6po9+jx 5 h6 bhh b $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, se zah n5-c)ob9gparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between- )gonabhc9 5z them?

  A 1.0-C charge is 15 m from a second charge, and the force between 9o0dq6iso 6* g7ml07:hyz /m q ivqehgthem is 1.0 N. What is the magnitude of the sec 9 /0molqhvd7*e io:6 ygsqz0qgh76 miond charge?

  Two 1.0-C charges have a force between them of 1.djerxra lw8 fpu5ce)32x(. yt y;h. c;0 N. How far apart are they?

  The force between a i-) m3fu2qsl8t2b/* rpkqs ux$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experieni6tw0n y2m0gkinrk * -*2ysmnce a 1.0-N force. If they aretnkn 6nmw0 2**ygi mir-2 0sky moved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point5zb8 xvxtcw::oyhv) y 56bc;l charges of 2.0 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 xyh vl:ybcxvoz6wb; :t5c8) 5 the origin?

  Three point charges are pla (gkrg 7-dmkd-+c5dql1ki 9u eced 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 +4.0d q7(9ick 1dldg umre5 g-k-k+ 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 lu*-g3ki arp(73 uhyt aocated at the following positions: Q1 = 2.00 mC at x = 1.0i-ur3 t(hyau7ga3* pk0 m; Q2 = 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 plac:x-f+aeui vlr0 f7./eh tz;a 0w6qh dged 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 a;h rfglq+vt e7az/ih.eu f wda-:x006 t 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 is at (0, 0.10 m); Q3 = 5.0 nC is at/g) n :04wcd4dln y;g yjbj1ml (0, 0). Wha0/jyd4 c) w;gjg :lm 4n1bnydlt is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 h 3w+l.a cm*z y63djetm, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the nt*+.z6y 3 md lwae3jhcet force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are plaxu i hom7))ee9ced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of tho7)iee9 um)xh e electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.6tvx5 :prb3 wj0 m. At what point, on a lr tx:p wj65vb3ine 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 the origin and a +9.0-C charge is at x = 4.0 m. Wherem-e03qz0, ag430jaxvmwl3n zmu jg9 l on thelua emz-vg30aw0 l,0 3 4njm qjmx9g3z x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x =kajib ,5pr jv- cz(.rd*z6f3y 2a. Where can a third positive cz5,* i3v r(-c.jbdyk6zj pafrharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g.onnik g/9. ,;rolunx( ap2.g c 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 (,rz,g bfilyq/0j)uwpy. (e,y ow3bi gravity by the attraction of a fixed proton some distance above it. How far above the electron is the pgb.l ,3yz yp b,fjwu,io0()qi(ryew/ roton?

  Two 0.20-g metal spheres are hung from a co8:7nnfr: /zilbqdl, bmmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betweenbnl:q zi 8rf,7ndl:/b the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge o2 o 8x5pg0k*lyrvdpf0f +40e. What is the magnitude of the electric field at a distance of 1.0 m from thpkgo rf00pd5*v82l yxe nucleus?

  What are the magnitude and direction of tl ,;s :2pj*sw: fh9wojpku(qs he electric field at a distance of 1.50 m from a 5js(p:hs:qwj9w sk, p;lu fo2*0.0-nC charge?

  A 5.0-C charge is 10 m ddro2n+ z;x0nfrom a small test charge. What is the magnitude of the electric field at the location of the test chazn +o;02rdd nxrge?

  A 5.0-C charge is 10r a qanvx41 2t3h0e(vr m from a small test charge. What is the direction of the electric fierat 2vqa4(vhx1rne0 3ld?

  A 5.0-C charge is 10 m from a small test charge. What pa0k w8t(gm4yis the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test charw0k pg t(a48myge?

  Two point charges each have a value of 3.0 C and are separated b/ empo*z0ua+rhm6 r.azrd +b crs+7: c4v9c bmy a distance of 4.0 m. What is the electric field at a point midway between therhm md/ar r sbvzm+ +. 4cbpc 9a+:r0o*u67ezc two charges?

  A 5.0-mC charge is placed at th*l2 keezhoas d04r *p4xh*3ahe 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 theohza*hrps34e*2 *h0 kxe al4d 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC char+edyt . 2al tr-e0-rghge is placed at the 50 yt+lter.2a d-0g- rhecm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC a oat,7a*7+4 sfjif suind -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at th,jsaffs io4i7+t7u a* e point midway between them?

  Three 3.0 mC charges are at ;tzaiez396th4;qi,b e w: iil the 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 centerqh;i9:4z 6ib;ewt zalti,e3 i of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corq dx( gsa0ju49ners 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 th 0guq49dxsaj( e 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 uniform eleb sr-qg;g7 rtn8);ejtctric field. t sqggej-r;rt8)n b;7What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass o7p3 a9qwce -arf $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed 88hu3ackn5 vqin an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for ikc83h vna85uqt to be suspended?

  A foam ball of mass 0.150 g carries a charf ai5m-)p.7qn6 ps4jhssnp2r ge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Wharpp mq4s6 27ifn .hj5s-n s)apt are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is to+,d r y69eohogd6 na5he magnitude of the electric field 5.0 cm fromadony o 65h gre,+o69d the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What isbhr o*-s91eh duus ;a8 the electric field 6.0 cm from the center of the sphe a8es1hs-dr;u*h 9boure?