State the law of conservation of electric ch7kac;mrrf * k3arge.

  Is it possible for two negative charf4t 1iavr+ el+q-x0fzges to attract each other?

  Is it possible for a positive and a negative charge to attract each other? 5ej-yk4-, hfy bkkffh*w,pu0

  A glass rod is rubbed with a piece of silk. Duri*mp2tpe *v o5dtz/u;y ng the process the glass rod acquires a positive vt z 52 o*put/;*dypmecharge and the silk

  A proton carries a

  The model of the atom shoufd 5y2yr b16wws a

  A neutral atom alwayq *8z5f .v:-gvj nj.l*t upteys has

  An atom has more electrons thatw vq j:ko1+-)b jm,upn protons. The atom is

  Materials in which the electrons are bound very tightly qt(7bb1 piqyoo f3d)9 to the nuclei are referred to ybo d39pt qo)i b(7fq1as

  Materials in which the electk:pfofy7s0t hvkw *14rons are bound very loosely to the nuclei and can move abou o0fs: w4hyptk 7k*f1vt freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged mehxjz79:g h/ wb 2n;rhgtal bar. The end of the metal bar farthest fromw97/b :;hhgj2n xzhrg the charged rod will be charged

  Sphere A carries a net positive charg2dglew 5zqq -)e9bkhi4xu;)x dg0x )re, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wir95 );x gk)dlzd 4r-eg0 huxxi2b qe)wqe that is grounded. Which statement is correct?

  How can a negatively charged rod charge e40x/f x8rspe an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively charged 5pg9ar s-m6lug: dhn7gpnug-7:5 9d lm6 asghrlass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a p76uw0m : j1xwuc uklm0ositively charged glass rod is held 7kj mu6:1xwcl00uwmu near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separ 3mp51 0twmymqate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the tqm0y 3mp5wm 1leaves?

  A large negatively charged object is placed on an insulated tagp -vgi/1,kghobu (pto wu/(, ble. A neutral metallic ball rolls straight toward the object, buv, 1h k(gpuu tgp(wb,g-/o/iot 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 object. What is the final charge on each ball?

  Charge is

  What are the units of the dcjmrtzdr1 q7d , qf*i2,12fdCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are zg (bi bm)d3,px*6 n s4ps-0idmku4wq separated by a distance d. The first charge is larger in magnitude than the second s)qd bspm xu 4-dn*gb0i k63izw,p(4mcharge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near h6wrq- sm:c2jeach other on an insulated table. Which statement best describes the electrostat 2-smc:6wrjqh ic force between them?

  Two charged objects attract each other with a certain force. If the chargea(x6gzrbz 7m2k r/b6ns on both objects are dobx2 gzr z(/n66k7amrb ubled with no change in separation, the force between them

  Two charges are separd2z0r7 ; 1eqqs .jqotyated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance o. t2 1qq7;rsyjoq0e dzf d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. *gce6e6s1b lp2 t5nl++zxt jm8yd ;ck 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-s1cy5cxlt8zj tn6;de6 g 2pk+mb l+e*fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. ajypuhe 89(b, What happens to the magni,8uh(b 9jpa eytude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separate1a,u 8aidak3 ld by a distance of 1.0 m. What happens to the mad 1a au3,a8kilgnitude 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. What happtm ldv00 vu4n7ens to the size of the force on the proton if the electron is moved 0.50 m closer to the7vntul vd0m40 proton?

  A point charge of +Q is placed at the center of a square n/ *hqai4n,.(iymgo b. 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 *b,yao/ i nnq4gmhi(. 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 a/o: dxm;g-y rat the centroid of an 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 third ch/:daogx mry-; arge of +Q placed at one of the other vertices?

  Which of the following :xm/bxoql 2(e is not a vector?

  At twice the distance from a poin7avfqr84c; . tmu cmxrz:rowgk)*v *4t charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and4 r5yccr s b0*s5dmduvd1),jz positive charge along the line joining the0 c,1j udd)ss rzrv*54m dcby5 two charges?

  Is it possible to have a zero electric fiela 3m4hzeuac;4d value between two positive charges a;3eucm4 a zah4long the line joining the two charges?

  Electric field lines near psitive point cha)ww* nz9il35zoo+wi r rges

  The electric field sh*dc:w*z hrbbg1s/ v-zown

  Can electric field linesxekz7; b+ii5yae xq)/ intersect in free space?

  A solid block of metal in electrostatic equilibrium is plat1uhs t gtp:;8(usip8 qis/b6( pzk9x ced in a uniform electric field. Give a statement con g kt9pi 6pt ztbxh/(ss1s:;i8p (uu8qcerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are 2g cri,a8b0l+ ;q8sq1p/wcs dam x 5nyeach given the same charge, the ea/ ins0gymrwxca 5+q,qsc l81bd2 p ;8lectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a regio p( - 2g(fa/o.n7 aecs7brbtlrn where a uniform electric field is directed straight upward. What can(/7flarg pc7 -e(oa.2btsnb r be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chj,h hbk5f s 4eg 1v;iw0lsuw(5arge

  A positive point charge is i4qq (8od 4lg*,cgq) y2aybebenclosed in a hollow metallic sphere that is grounded. il gy44b*)(cq go bqd2,yq8ea As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conduo;mfu9*ag.q6ypx v9q9gzep* s b9 l ,gctors in static equilibrium.

State Gauss's law.

  The charge carried by one 7 b r0ad.p)rq0t)y t;9qcvkcm electron 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 mdoj wd; se*a) 3y3fm3u(tlk0m ore protons than electrons does this piece oe;u o(*w 30dkmlmy3st3)jfadf plastic have?

  What is the charge on 1 kg of protfpb yka* v6,6.kte9 lwons?

  An atomic nucleus has stobo :cr42l:wa,3mm a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separaqvoe2ce;q dfjc6rouf.se0//ixf ; (; ted by 1.5 cm, have charge values of 2.0 and -4.0 mC, respsci;.6 rf c2xo /ve/(ufq ede;0qojf;ectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second ch0tvw cwdtm0 75arge, and the force between them is 1.0 N. What is the magncv0 w0t75tdwmitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are the8fdu(l 4o;) t( wrpzvtd)pn9 fy?

  The force between a wnp-6q2cdb63g*fj 2vaza q) d$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initt3 hc0pkyi+a3 x i3s,eially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of0p ,ah 3i texsc3k3+iy 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pl0- +w kkx*pwx5;hw2delz9l0g, y+go 7xjqvhwaced 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 theo edpw ,7wjk9qw0h2+gxkl- ;lw * hv5gx0z+xy 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 charge of +2.0 mC is + yd)gu2yf 0q 6mlhg4kplaced 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 thel42 mqg )kf0yuy+hg 6d magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the followizl, m y4kn3s8kng positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = n84 zyskm ,lk33.00 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 x2ya :nbyae;.r3 l,gwsecond point charge of -Q is pla2eyxb y:gar;awl, 3n .ced 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);: 4s */wqqigbd 1.trjy Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the n*it. d1jq gr4q yb/s:wet force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is ati5bqdgkiupu;h3 5 p9 .pw;xxo/0ckw1 (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net ford;wop3kk1u;h gxq i05w /bc5px .ip9uce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are wdgq 0gox/7.r)wr yf.placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force wry)w /r.0gg7f qxw. odhich acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At whasb2lden1d .0u ti-i u0t point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic f1-lieddu0.b inst0 2uorce acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at1*m37bu vrioz x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zer vb1iz7umo *3ro?

  Charge +2q is placed at the origin and charge -q is placedf(no0 z1h;/0t up fusq at x = 2a. Where can a third positive charge +q be placed so thusz/f0hqpf(1 o ut n0;at the force on it is zero?

  A copper penny has a mass of 3.0 g. A t22thb ;y7zozi 3ajac, otal 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 fo2f14)3w jlu*qgkixjo rce of gravity by the attraction of a fixed proton some dis g3w)*2j 4xq i1kjufoltance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hz(,vlnw cumz+b5:4 prhj0/ ztung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the elect,/ bvhzp ucz:+0rlzm5 j w4(ntrostatic 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 +40e2br9u ll) )r7qqjbvln:6 cj(p. What is the magnitude of the electric field at a distance of 1.0 m from the nucl)7j(vb6rc ju)blqqr9l2l p : neus?

  What are the magnitudei;jh x v7.n2pm and direction of the electric field at a distance of 1.50 mix;2vphnm7 .j from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thed +3jrv2m8hsq3uc ov* electric fs3qvhmjo+8 uv* c3r d2ield at the location of the test charge?

  A 5.0-C charge is 10 m from as-a hpo -*e9vzyq ycg7+.etk8 small test charge. What is the direction of the electric field?oqzcvh +y -a gey.97*s -e8ktp

  A 5.0-C charge is 10 m from a small test c rk:rorp+guumd7 141bharge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test chargedmgpru :7u1 +bk r1o4r?

  Two point charges each hx rfpb,37b fm5rue/i:ave 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 thefb/x,7m 5ub:f rper 3i two charges?

  A 5.0-mC charge is plap:dn 8 x1(ts(uu)vq:vhie pp5ced at the 0 cm mark of a meter stick and a -4.0 mC charge is place)npipsqp:v8u:e ud((txh v 15d at the 50 cm 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 stick and a -4.0 mC wc+ix w7 d1ku)charge is placed at the 50 cm mark. At what point on a line joininiuc wdw 71+xk)g the two charges is the electric field zero?

  Two point charges of +3.0 mC andcswq:tuoxbw*/, np,( .n6y i gsbcm;5 -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between t bm ugws:/q;b.t6ipo(* yc5xnws, ,nchem?

  Three 3.0 mC charges are at the ipc;fg)ktn3 8- )tmtryqm-9f9n m g4rthree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fieldc3frm- nftmtngmi)4)r9p g8;qy-k 9t at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed pkoy/n0 ijo 84und1l. 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). What is the magnitude of the electric field at the square'sn ijk/louo0p .ynd1 84 center?

  A force of 10 N acts on a charge of 5.0 mCf .mw x3 nt0paasgfp0.. 1,in4gu+3b9g cagpb when it is placed in a uniform electric field. What is x3g1 9nwbfp3+.a 4igma nbggu c,psf.t.pa00 the magnitude of this electric field?

  A particle with a charge of 4.0 mC y2l di+5f.8(w yievtnhas 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 60v p(xmib gmp 7x1(h-/a00 N/C pointing downward. What charge must be placed on the ball for it to be b1vx7m- (/ighm xpap( suspended?

  A foam ball of mass 0.150 g carriemsl;w qq5yaq:pu17tj/e*pz) g z 8,drs a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against thez:s) ,g ;5e8dpjut *mz1wq/7rpqlyq a force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge zuhksektm 93o(fm( qq*;p6, o of +2.0 mC. What is the magnitude of the electric field 5.0 cm frouos opq3t( m,h;6 ( mfez9k*qkm the sphere's surface?

  A metal sphere of radius 2.0 c, )vfw qyy*lwi(9vtx-m carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of y,vfqy) *x9tw v(- wlithe sphere?