State the law of conservation of electric chag)um5xxnrw *l6yeg9 -rge.

  Is it possible for two negative charges to attract eacymijk9/n )vg 64 l2dfch other?

  Is it possible for a positive and a negative charge to attract each otherg * aq3jm72kkbqaqw(,?

  A glass rod is rubbed with a piece of silk. During tfp tr:+:z yh-yyg7s+ khe process the glass rod acquires a positive charge anzkg-++r:ysf7p y hyt: d the silk

  A proton carries a

  The model of the atom showsuxm p*2nw7r 2s a

  A neutral atom always ha0ygjmryr *,w,h4zzx./ n;kkzs

  An atom has more ele) gpw)mf( zg. jr+hwo,ctrons than protons. The atom is

  Materials in which the electrons are bound veryzw d* yzudl)*2rwc,v; tightly to the nuclei are referred to a2)yvzc*l r*,wd zw u;ds

  Materials in which the electrons are bound very loosely to the nuclei afebq;k /-. 85pxjxjphnd can move about freely within the materiaqe-hf5;j8. pjpb /x kxl are referred to as

  A negatively charged rod is brought near onemv2tcx*(o 9.r/ jx iql end of an uncharged metal bar. The end ofovcl.im(9 t*q jxx2r/ the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. izf +jm,)8jfbyk3;owzf* .xlThey are placed near each other on an insulated tabley zxo+*j fbj)8mzf,3ki .wlf;. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively cha(hp 645u eyv /-wwtof42enwyd rged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positive jfnv2 -.m4 vwywi925z2 gellwly charged glass 9z wl25.i2fmwgje n 4y2l vvw-rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positivejgfp 0 3 -r9uf xwqyn.l zui:)p6aoc69ly charged glass rod is held )c:ufgr zo .ap9xfy69up li03qn6w-jnear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and th)by.kd11 zixk e leaves separate. Then a negative object is brought ned.z y 1)1xkkbiar the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tab ; .q)alcr g.;rnjw/xvjjd1m-le. 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 forward,-.djvg.w;mrl/cjr1 njx a);q 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 m6rh *jj;lb2 dlcx9i5 Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Tw kes-w.1s ki0he first charge is larger in magnitude than tw1ss w.ikk-0 ehe second charge.

  Sphere A carries a net charge and sphere B ist 8ogn8- l+-sgp 8nive neutral. They are placed near each other on an insulated table. Which statemeps -t8v8-gen iog8nl+nt best describes the electrostatic force between them?

  Two charged objects attract each ot2z-o *n vn)gszher with a certain force. If the charges on both objects are doubled with no change in separation, the force betweenn ozz vn-)2gs* them

  Two charges are separ/*uor. gman; qated by a distance d and exert mutual attractive forces of F on each other. If the charges are separr a/q umo;.g*nated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othbmk.o x jrl3 sp345f0p 7axy)aer 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 original value? The force is now equa x p3jlxys .rma5)k43 ab7p0ofl to

  An electron and a proton are ozsj4/+4nu kl separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electn j k+lo4zu/4sron is placed next to the first electron?

  An electron and a proton are separated by a dista.vh k5l2bf*zx nce of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the pr.bzxh vl*k52foton?

  An electron and a proton are separated by a distance of j5;r ;-ro 4hfdw0ndkh 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.5 w j n-dkfro4;h5hr;0d0 m closer to the proton?

  A point charge of +Q is placed at the cei)5eds 0v hk)fnter 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 is the magnitude of the net electrostatic force ah)ifd e5k0)vscting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of anwk1b/vje e,.bqq:k ol)sa xtt3- r6g3 equilateral triangle. Whenb1 -oxqw63sq,a/ k).v r tl3tke:jegb 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 placed at one of the other vertices?

  Which of the following is not a vg. h,.hh42e5)t tckdl. dmemqector?

  At twice the distance from a point charge, the strength of the electric fieapt5+vxxbj.4wh5 bz *ld

  Is it possible to have a zero electric9nbv m.iu-di*3v)whw69gk iyh :e,jc field value between a negative and positive charge along the line joining the t3inw*yhi)dv bci-.m: jue 9g6h,w9kvwo charges?

  Is it possible to have a zez35 6ot(h5 q6 qhxkxkero electric field value between two positive charges along the 6 ke 6 ohqx35zhqt(5kxline joining the two charges?

  Electric field lines near psitive point chu,i ga xk.3e/xc)*6nzvy: u jqarges

  The electric field sho fb*kba )1vcesyc64l7 wn

  Can electric field lines intersect xlg c)en.ta59zq6t- y in free space?

  A solid block of metal in electrostatic equilibrium is placeqzls)q+bueq+qnd )mc9s/m a39kv p 16d in a uniform electric field. Give a statement concerning the electric field in the block'sq va1/)9u6qsensl)3+ 9mcmbk +dpq zq interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gb4a0yo,z)d*vdwm*pvg 5ab k- hx f// diven the sm-,dpobz*ka* fwh0y vvb /dx5g /a d)4ame 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 a unis:s(wd( 45oe)k a wmhyform electric field is directed straight upward. What can be said concerning the charge on the block's ma ok es)w(dy4h 5(:swtop surface?

  If a conductor is in electrostatic equilibrium near an electric chargezvax)p .5l m t0h64sov

  A positive point charge is enclosed in a hollmtjf wm+ :ga+dfme 1)i,)6 2xdatv1u now metallic sphere that is grounded. As c nmddj1mat,)++fa6i1ut2 mw vx f:)geompared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties ) n.+cs-elrjrg g1/+ zm)i uhzof conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elect 5urqpvdxrk* k-3,k d0ron 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 pr8ku(w7x98k0texwo s potons than electrons does this piecxk08kp(w8xus w9 t oe7e of plastic have?

  What is the charge on 1 s4 ;g k7/uyrkikg of protons?

  An atomic nucleus has a charge o*9s h.n44wa nyouo )ysf $+40e$. 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 -rn:;gt/ ukicdd : ,pk1/ kd5 ab4iwa+x4.0 mC, respectively. Wi,ku 1k/dd+a g:; bp r5xt/:wka4incdhat is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, a dffg3n m2,z.fnd the force between them is 1.0 N. W2f3 ff, zgd.mnhat is the magnitude of the second charge?

  Two 1.0-C charges have a force .t0m dfonzbu 9sr q3)2between them of 1.0 N. How far apart are they?

  The force between a flb+,(4ojefb0l/ 0i 8qn juoa b9g.ew$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ehp(r un 3u,2pya7m +.o4wbkmcxperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, wy+ 7.umm2b 3cop (kan4 wu,rhphat is the electric force between them?

  Three identical point charge d ja-.+dt;wphs 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 ele; j.+d- thwdpactrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axir2b0 pr ;wh,ozs. 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 hw rop2zb0 ;r,magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Qx szif -pw1 lkv3p.uq. -),xvv1 = 2.00 mC at x = 1.00 m; Q3 wf)x vkvl 1p-s.q,ui.p- zvx2 = 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 placed at the center of a square, and a second point chzv1i3jun9f6 t;lm pc:arge 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 charge of -Q is placed at the l tfc;:mz vi6jn1u9p3lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 .n.k8rd6r0wjhpv0l nnC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnl6p8vjr nwr .dkn 00.hitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.3kt d+klxllq/ 2m-ky(m* e))sj0 m, 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 net force l))j2kle+lq/ xyt dk(*m ksm- on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed a .rfxrcl(cu, 4t the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the elec culf,4c.(rxrtrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are s;k7 mp7 oo ib)w(uuz4,b1tf xxeparated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge( uxpzkux1to wb; 7bio 4,7fm) 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 95 6g ul8/c1d00phm-)pxlzohh eafiz is at x = 4.0 m. Where on t0hd-oe m la198z6x h/uhpflgzipc)5 0he 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 grr rf/,l6;m1 kkeg3r(cr ef7 x = 2a. Where can a third positive charge +q be placed so tf ,gk1e(; erk6ml7g rc rfr3r/hat the force on it is zero?

  A copper penny has a mass of 3.0 g. A total of gg99zlb7 .xtb7. pxalmvq70i$4.0 \times 10^{12} \; electrons$ 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 thewqb.y55 5weoi force of gravity by the attraction of a fixed proton some distance above it. Howw5w.iyeq b 5o5 far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common pointk-9h2wmu wpcj (gey.p3ai,f ) by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until ij-k9fg.wpyh ,)ecwp ua(2 m3 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 tax 9 .rvb+nkbh0(2loxhe magnitude of the electric field at a distance of 1.9rokvb+0h.x2 n( bl xa0 m from the nucleus?

  What are the magnitude and di: 2by6awh;u+frs1ou drection of the electric field at a distance of 1.50 m from a 5f r;bua6owy1+u d: hs20.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is thm63 ,z2wvq. *y kolmf57n n4gy wah8bee magnitude of the electric field at the location of the test char34ob87ay .yzmn w f2mk,qnhg65e*lwv ge?

  A 5.0-C charge is 10n0icc sf/rz: 1 m from a small test charge. What is the direction of the electric field?1f0c:zrc/ nis

  A 5.0-C charge is 10 m from a small test charge.5rd m-tffzutev:1r. d9 3ab.p What is the magnitude of the force experienced by a 1.0 nC charge placed at the locatf-9zrt .15v ur:ft e3dpabd.mion of the test charge?

  Two point charges each have a value of 3.0 C and are sepaksaqd6+v9 lalen (sk i-5/n9srated by a distance of 4.0 m. What is the electric fieladns ss6k9-(lk/nv l+9 eq 5iad at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stichmz3a1j3 5jmt k and a -4.0 mC charge is placed at the 50 cmm15mj3z ja3 th mark. 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 sti j* bp:3ds(tl8.t(kna s l2byy4gghing 1+hy6 ck and a -4.0 mC charge is placed at the 5yn3 ( hpk(2d:ggti4 n8. bj*s+lsly6a1 bytgh0 cm mark. 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 placwejje7 j6ch:f , cc-6ped at x = 0 and x = 0.20 m. What is the magnitude ofc- jecp76,c6 :j jhewf the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of si9qk*zz;z r1tke 6:fscxrq .2 pde 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cenrxcq61 k2 t *fp.:zrekqs ;zz9ter of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners 7lt6nz psyneci.s.2/ 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 e tnp nc.z/iss2l7.y6is the magnitude of the electric field at the square's center?

  A force of 10 N acts on b ap*;e(gyrsh3t4vo8 a charge of 5.0 mC when it is placed in a uniform electric field. What is thpba4 ho(sy*g3;e rt 8ve magnitude of this electric field?

  A particle with a chap6egg1:fb9: fvm 5oxhrge 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 0.1246myai 4rig;,m o8tce0 g is placed in an electric field of 6000 N/C pointing downward. What e c44ar6gm ioty8mi,;charge 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. T/yk*s-ojp l.n f:0izp he ball is placed inside a u*0/pl zn pi k.-:sfjoyniform 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 cjws4wf-wj b; 0harge of +2.0 mC. What is the magnitude of the electric field 5.0 f;bwjj 0w4- swcm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is thp6r vkk8+r+pi1 6hk.ch 1s:y dh*eq tle electric field 6.0 cm from the center o18chedt6qh vhklr++y*:ksk pri.6 1pf the sphere?