State the law of conserm*i a qjo w(7bz(o.le:vation of electric charge.

  Is it possible for two negative chargp-,.f,a vnoo k3, gh02kmi lzt)eo;oue) 4ovjes to attract each other?

  Is it possible for a positive and a nl)e8mbn5 (bem egative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod acj2 rn6s :vy jig76rwpo+v7o ,1p idu1vquires a positive charge and the s7,y7: r+v6 vpjjogd21i1 s6pw ivruonilk

  A proton carries a

  The model of the atom sh9 u. 5cwj1muipows a

  A neutral atom alway xlxwd* kxp8.8s has

  An atom has more electrons than protons. e/ 1le) 1hvtk8cq7u *zkd6lfmThe atom is

  Materials in which the electrons are bound very tightly to the nuclei kpc:g:6h *1yvb(dufbare referred to 1du v: bcfbk :(6*gpyhas

  Materials in which thqwa tli+2+2 q;n /ns5ynwua n)e electrons are bound very loosely to the nuclei and can move about freely within the material are referred to+;ay +/2tann q) 5lnwsi2nqu w as

  A negatively charged rod is brougr,a1 bik7x240pik wtght near one end of an uncharged metal bar. The end of the metal bar farthest from the chargetk ib2a1r0p4 7giwk,xd rod will be charged

  Sphere A carries a net positive ch z8b:8nw2sfmgarge, 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 grm8wbnf2gz 8: sounded. Which statement is correct?

  How can a negatively charged rod charge an electroscwp ,u-lc hv2n20y4yx i70raviope positively?

  An originally neutral ee82v:ddq8opoy e) es+h 0 p1xllectroscope is briefly touched with a positively charged g oh+eo 8ev8xq ps1p :dl0)d2eylass rod. The electroscope

  An originally neutral electrosczrr8t 79is2wlope is grounded briefly while a positively charged glass rod is held near it. After the glass r28i7szlt9 rwr od is removed, the electroscope

  A positive object touches a neutral elecp53md615xz m 6tqha xitroscope, and the leaves separate. Then a negative object is brought near th66a5x p xi qztd135hmme electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is8s8 x tmuh7r; t+:uuca 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 followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch the nega xu: 8h8u7t m;cstru+ative 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 Cd;wkzl) yv7-mq zwr v1q-ij)( oulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The axi rf4-z4h +kfrxl(b;r, (snfirst charge is larger in magnitude than b+r zfnas i4fl,;4k r-(xx rh(the second charge.

  Sphere A carries a net charge and sphe 0jia7+cy4k nere B is neutral. They are placed near each other on an ins0kna c+4ie7yjulated table. Which statement best describes the electrostatic force between them?

  Two charged objects ar47 mha0b wc-mz8: rjgttract each other with a certain force. If the charges on both objects are doubled with no change in separation, the force between th j 8abrrm4h0cz:wgm7-em

  Two charges are separa9w gfm *1mmbs).v /lplted by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what abmlp m1/9v lf swg*m).re the new mutual forces?

  Two charged objects attract each other with a force F.r80k *; lwj;lxv2s bmwu*xr r rn/l22h 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 n lkrmrx 2jr2v/ n8x0u *2lwhw;*rs;lbow equal to

  An electron and a proton are separated by a distance w xefi z+:6+ hy9fxyl2of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first e 9 +wif6exy+f:zh2ylxlectron?

  An electron and a proton are separated by a distance of 1.0 m. What happenvsu3g; ;t.qw ys to theu3 g; ;v.ywtqs magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m..bx oxt7; 3dh/ ivlu8m What happens to the size of the force on the proton if the electron is moved 0.50x ot8hxm7/d.b u; vil3 m closer to the proton?

  A point charge of +Q is placed at the center of a square. Wheukfhym89kv 3( q(4)dyrf * tagn 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 n4d y(y93(v ht)*fa rgkkum8fqet 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 equilatvhb p7tep9y1wk o43- deral 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 bo- 4kwyd3phe1 79 pvtthe 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 +hz0 wew: cixwszk0i-4i l*h)zh9;::q cvwwc vector?

  At twice the distance from a po b)j7hw*mh j,wint charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and positi9j kwf:8xih xjq)2q*wgu4jr1ve charge along the line joining the two char )j9:whjx 21qri u qkf4xw8*gjges?

  Is it possible to have a zero e8 wyxz; a)jlg*l+,aby 8ndaa nat,+6 clectric field value between two positive charges along the line j;w,llan zcaat 6 y*)+aa 8dxygb8j+,n oining the two charges?

  Electric field lines ncpxn4a)e6j9phy9 : jfear psitive point charges

  The electric field shc3qoxa)nv7f,e0 qcev (z (d;bown

  Can electric field lines k-algw jw)*si5:vv tg( )gz-cintersect in free space?

  A solid block of metal in electrostattjvgc;i. bncu5)frl d 0fo89c2uv )c.ic equilibrium is placed in a uniform electric field. Give a statement concernid9 b 8.vtrcc vc0uj)oilfnc );fug.25 ng the electric field in the block's interior.

  If a solid metal sphere anda n.vhngnpb :. t6p2a; a hollow metal sphere of equal diameters are each given the same chbagph:6.2anv n.; tpnarge, 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 unifo(fi setkb81m7rm electric 8 ef7(tbkim s1field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric charxm kcn3 4vunf;xkop) +ah*,n,ge

  A positive point charge is enclosed in a hollow mewo(kp /k8xk*vd;-*crk 4 q:e;yj k giktallic sphere that is grounded. As compared to the case without the hollokj 4 pqd kyo*kck -er:8;* ig/;v(wxkkw sphere, the electric field at a point directly above the hollow sphere has

State three properties of conducto ,nb)orz8s6 pars in static equilibrium.

State Gauss's law.

  The charge carried by one elewlb;( x7 bvvi1o zs9:*xl5jsnctron 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 t d0i-.ne gb.e+2.00 mC. How many more protons than electrons does this piece of plastic ha.e g ne-d0b.itve?

  What is the charge on 1 kg owa; m9n +(fu33u efx5llebmjb+, 6cpcf protons?

  An atomic nucleus has a chflief 5m(5klir5 p) .oarge 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 values of 2.0 and -4.0 mC, og 1c t5r jp7c9yi2.uorespectively. What is the magnitude of theoc5 ic. 7tyo9pr1j2gu electric force between them?

  A 1.0-C charge is 15 m from a second cha; 3fwcar uyd2f4hw;m wv7*3 lqrge, and the force between them is 1.0 N. What ma7df;3*;q4cwu2ly hw fr3wv is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. Hs()g * rhystg6ow far apart are they?

  The force between a ao 8+7p 1ukihjjzd1 l1$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm ap3jhzincdwouo, ( (v+5 art, experience a 1.0-N force. If they are moved to a d(uj(5 h v+cw3,zio nonew separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Th5pi nwz* 8ww/n1ga z y88zbqqx72t- vbe 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 chbq7z 2n8wv8y nqt1w a/x-g zi5p8b zw*arge at the origin?

  Three point charges are placed on the xs,kk0ch 5fs)u*;n k th-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. ku)t ;skn5c h,0khfs* What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located kf1h ,lg. uzx;at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -zkx1,hu .; lfg5.00 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 cen/xws : jbzvx l*t .cq6+8)offater 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 at the center. What is thwfast. vofxcq /b j8+* 6:z)xle 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 gcs:sm ;;g7,.p9po vlu)leq a(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the gm seo;g );pcu:7. l9spa vq,lmagnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0gr(z/) r6 f52,wg0 dau axdmgn); 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 on the 5.0 nC chau r0zg)d x/mda(25gg6anrf,w rge?

  Three identical charges of 8kzwy5y(6d c or l0xj/3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which act(0zc5y6j dlw 8/orkx ys on any one of the charges?

  Consider point charges of +Q and +4Q, whichabh0ud f()j 4q are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place aqbja 4df0uh() charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin andto0of+:g m4n p a +9.0-C charge is at x = 4.0 m. Where on the x-axis caom+04po f:t gnn a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the )1 xaglo, gf3oqnq1. (qi4h;krymy6gorigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the )6yf gmhyqa ;xkl4o (qrgn1.i13 ,qgoforce on it is zero?

  A copper penny has a mass of 3.(mz5u if djt(80 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 againwflx g-b./v2i st the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron ig x2.v-i fbl/ws the proton?

  Two 0.20-g metal spheres arjd85kad cm .9ry7n8zle hung from a common point by nonconducting threads which are 30 cm lonk7 9rzmnd jya85.dl 8cg. Both are given identical 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. Wr qmf8uup vx59m4(zq :hat is the magnitude of the electric fieldmuq x5:4(r qfpuzmv8 9 at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the qh13-,w6rfhf5p m2ocn zm-z aelectric field at a distance of 1.50 m from aof-,nr6whz2qp m -f3mazh 5c1 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudeor 4,reiov37r m1awk*auy2 q. of the electric field at the locatkr 7r*4uaq.ie ,m2wa3 yrvoo 1ion of the test charge?

  A 5.0-C charge is 10 m from a small test charaon+iqau (*/9xkt*h8rp1q i oge. What is the direction of the electric fielu1*8rqp ai9a t +h(ioxkq*/ ond?

  A 5.0-C charge is 10 m from a small test charge. What is thynck f-2bw2e +k a;g5me magnitude of the force experienced by a 1.0 nC charge placed at the location f; c2 wk+n5g2amey-kbof the test charge?

  Two point charges each have a v:o 4twrnk 8 ty 9g6zcns,m.9bdalue of 3.0 C and are separated by a distance of 4.0 m. What is the electric fi .cyrt 4 ko6d,tzsmwgb9:nn89eld at a point midway between the two charges?

  A 5.0-mC charge is placed at the hmt,rbidg/ 9wo )gda1m k7t 2-vb1qe 40 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm g g4eabd/1129o vqh7itdrwmmk b,)-tmark. 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 1e4;ueos.ni3j g9o4rm mk c l-w vr2n.and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the tr.r 1;ek jlw-o e m2 usnogi.3v94nmc4wo charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 an (qejz6jfj6i:d x = 0.20 m. What is the magnitude of the elejze: ij6qj f(6ctric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0;)h5x e cy6ehj.50 m. The last corner is occupied by a -3.0 mC charge. Find tx hhe jc5ye6);he electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corneric5rl4: ty s(qy4p;wu s 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 the magnitude of the electric field at the square's w ;54l( ps4yurqiy:c tcenter?

  A force of 10 N acts on a charge of 5.0 mC wr(wxcis(uvntdd ;88 yd 0n+.nhen it is placed in a uniform electric field. What is the magnitude of this elv 8+dnutxc0(.ir;dys d (wn 8nectric field?

  A particle with a charge of 4.0 mC has aza0 uf nindv1c/ r (8gen;di s.:(h 2m9wmeq*z 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 fimtmt+bo)0 vht+p6 ;o zeld of 6000 N/C pointing downward. What charge must be placed on the ball for it to +t)ptm+0tm6ob ;vzo h be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.02l.ctjo wt;e:0 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and directi e.l;to:c twj2on of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the mag*j:cb o:0bbum1zr4q yd6+mvmnitude of the elc1mobq 60 bzjv:d 4ryum:+*bmectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the ele;2a2ii3-vbx.yo p lx bctric ix3y2 xvi-2pb o bal;.field 6.0 cm from the center of the sphere?