State the law of conservati4heb al;2qk 8non of electric charge.

  Is it possible for two negative charges tokfvtd5/y7mwi bg 85r3l;ue k7 attract each other?

  Is it possible for a positive and a negative charge to attractj,y kkm-:*hs2q . quqt each other?

  A glass rod is rubbed with a piece of silk. During th*c vv.i3 )2tf4s 8kmax* prqwie process the glass rod acquires a positive charge and the silkks3 cv*mqiiwtv2.f8*4 rx )pa

  A proton carries a

  The model of the atom showsc-;2b tm (*os yeb(tzo ,gp*bz a

  A neutral atom always ha-xwmmg1xo mh1,/jj 2y s

  An atom has more electhxjsub4-harm6 z9u2 .rons than protons. The atom is

  Materials in which the electrb :+kzwccr hkr/+0 i.3x): wc-ffrojtons are bound very tightly to the nuclei are referrcr0fx+:rf+ w3 ccihrb/z-. k:otjkw ) ed to as

  Materials in which the electrons are bound ve(:yt7huni b7fsw 2n)dry loosely to the nuclei and can move about freely with u2tdw 7nihfb n():7ysin the material are referred to as

  A negatively charged rod is brought near one end of an unch puhu20) 5nzl5.puumkarged metal bar. The end of the metal bar farthest from the charged roupu 2 n 5p.u0h)zl5umkd will be charged

  Sphere A carries a net positive charge,*lyaj+uyj 5i8hii+ rtujx 0k(ae4;5 z and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched wi *xyk lzhai 0+ju55j+u;ae(t rijy 8i4th a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively38/cg o:.gei0f 9 yutlumpe -e?

  An originally neutral electroscope is briefly touched with a positively charg fx*s.hq*hl+p 9 7kbnbed fbpk n sqb* *.hxlh+79glass rod. The electroscope

  An originally neutral electroscope iq/suvms, w 7v4fdw53h3 vs-oa s grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscopevss /f qo,w43hd 37wv-ms5vau

  A positive object touches a a+u2.xmt9,s g3 fvdie neutral electroscope, and the leaves separate. Then a negative objex9us2ga ,fti3e+dm v .ct is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insujyn)3btur -+ xlated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball ro)3ybr-+u njt xlls 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 Coulomb constanthdp ip dvr+5n:r3d,c( $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first(qlttqn*ur0 2 als/+y charge is larger in magn0rnsl+q2t qyt/au (l *itude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near h v -)em35fhpi3u,tl5bijts2each other on an insulated table. Which statement best describes ,5p 5jhbl e -vm)ti3u3fhist 2the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charle+m, 56 sr2xg7oi k1)un8et8j hxh;x r7jmxdges on both obglm),u8e21r xx; hjhk 5s +dn x6erto mi7jx87jects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mug;u a1ui(t k45dz0crhtual attractive forces of F on each other. If the charges are separated by a distance of d/3, what ar(t04a1;5duk iurz cghe the new mutual forces?

  Two charged objects awm) ; lm;jv;5tfqwt0 tttract each other 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);vjmw5f m qw0;tt tl; original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hi1n nzz /0lig+wh,n /happens to the magnitude of the / zihhlnin/0g1z w+n ,force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distan whq:,-eoqo* cce of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to ,-:cwe qhqo o*the proton?

  An electron and a proton are separated by a distance of 1.0 m. wvle;c5 4n m2 jrvtk69What happens to the size of the force on the proton if the electron4je9vrvwmc;n 6t l 2k5 is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center 5 lf ucgyobq+/k32v5bof 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 2q bcy5gb/k5f vu+l o3the 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 equilateral trianezm)hv, h7b:m ,nv b(vgle. When a second charge of +Q is placed at one of the triangle's verticese v:zvhb)n ,m, 7mh(vb, 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 vecton p+qk lg8f9f5r?

  At twice the distance from a point charge, the strength of the electric fieldoh 7 dpgj48-hd9;a nya

  Is it possible to have a zero electric field value betweew3/dz 7ih5zj)t hsb(en a negative and positive charge along the line joining theth z75h s/ d)wze3bi(j two charges?

  Is it possible to have a zero electric field value/4eych5t ir(reawy ( f b9;l/onb.6 kh between two positive charges kyf(rb(ine/ ;ebocl haw6ry4/.9th5 along the line joining the two charges?

  Electric field lines near psitive point charg+ipe: j r n.se6)ci*srz*l3 gv4etiu,es

  The electric field shown f 1um 51w6anuo

  Can electric field lines intersect in free space? v d6fz)71wq;.-lzs cpvlz;mm;fr c+e

  A solid block of metal in e,rl*4 /j3dn3 zecuuork4 9.ncovumu 1lectrostatic equilibrium is placed in a uniform electrnn4u j4ud.m3 /c1zou 9r ko ,3*ulcervic field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sf lg 7 9mzdplla97ny;,phere of equal diameters are each given the same charge, the electric field (E) midway be9; ,7zpl 9gamydlln7f tween the center and the surface is

  A cubic block of aluminum rests on a zb mp+xhlp sfair.+6d( ( lk)+wooden table in a region where a uniform electric fiel (++ b6xfrlp(ial.+)szdhmpk d is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium n 8mcku9n-ju(x; mt(jmear an electric charge

  A positive point charge is enclosed in a hollow /55 o7,gz jtu-sqwhg lmetallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow h5tq/w jzgso7l ,5ug- sphere has

State three properties of conductors in h zxpx6+jor1;static equilibrium.

State Gauss's law.

  The charge carried by onetr q3v0*m ixg8+j1az:mka3jx 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 more protons than u)ze /sngr;k -electrons zn -rs/;gku) edoes this piece of plastic have?

  What is the charge on 1 kg of proton57xt h2)dg slhw bh/h3s?

  An atomic nucleus has a charge/qlel.oz2 8 br0cnw1y 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-5st7e8 puxfx, respectively. What is -xxu7e8fts p 5the magnitude of the electric force between them?

  A 1.0-C charge is 15 m fro4kwuwa qay3 y*79vq s(m a second charge, and the force between them is 1.0 N. What is the qa(k wv4sq* 7yya w39umagnitude of the second charge?

  Two 1.0-C charges have a force betweej ,i qmyssde3e 92u69b9/wvwq n them of 1.0 N. How far apart are they?

  The force between a )u rf cc*s3,fyrs(f w0$30 \; mC$ 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 forc k31 5nepptpx,pjkm5h; lg) :fzf.4oke. If they are moved to a new separation of 8.0 cm, what is the electric fx1.f jh)gp3opfn,t:zp 4mep;5k5 kl korce between them?

  Three identical point charges of 2.0 mC are placed on the x-*o jv;3m-vimdnb ;uzels+5b )axis. The first charge is at the-in5bd3mlv u)jvmso;*+; e zb 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 the origin?

  Three point charges are placed on the x-axis. A charge o ;e q)(v9w5behbja hc;f +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 q);9 whj;ec5evab hb( at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC t db/)q9m bm0 riea+f wgf: eaw96;,vrat x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 m+ab,/f6da:qm09 rriw;b e9gm) ev tfwC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placetmw 22mvrr-islh )m63o th c:1d 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 at the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is place)c hlwmm: 1hrvi32t- rot6sm2d at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 ys-*g c.x2yrh.cfqng *t+y* 1vd m h/fm, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What ihcgx*vt2*gy q .f.1/s+ yf rmydnc*-h s the 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 wyo4 o8 u uhwl+kx23c-/6wwnym); Q3 = 5.0 nC is at (0, 0). What is the d2-hw8y nxk6/w + yc3o wuwoul4irection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC a0 5cb9oo3 qz,xkbfny /re placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on anyk5b foc zo /yq3bx90n, one of the charges?

  Consider point charges of +Q anditwtz.6snv t38fs 2+ g +4Q, which are separated 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 force actinz2 6wt.i+tvfgn st83s g on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chargls0ahk/;tz0 ue is at x = 4.0 m. Where on the x-axis can a third charge be placed so the ah 0s;kul/z0 tnet force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at (1j)ca5jh v nfmbhv0 8x = 2a. Where can a third positive charge +q be placed so that the force on it hv()na1cj5mhv b0f8jis zero?

  A copper penny has a mass of 3.0 g. A-,h:cr)v8 m aksys,g5vv )rqx 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 0xidm;.57hslfij 8 hcforce of gravity by the attraction of a fixed proton some distance d 7xi058fcimh lhj;.sabove it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by n:be w ,m/j2)avgczbcsz(12o u onconducting threads which are 30 cm long. Both are given identical charges, andw ube21zgjc )(,cva:m2b/ osz 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 efoxk en, ;l*.alectric field at a distance of 1.0 m f,;o *.kelxn afrom the nucleus?

  What are the magnitude and directiona;wta(+2 bz;.ffq ldzuy 1k q0 of the electric field at a distance of 1.50 m from a 50.0-t.wf ;a2buy 0(qadf z+ 1;lkqznC charge?

  A 5.0-C charge is 10 m from a l0hx;0vuouyk5 :lrxgtvv):: y uh;/v py sa 6-small test charge. What is the magnitude of the electrxu:)tk axyuu: : ol50v;g pl0yvh-; r6v y/hvsic field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction ob3)cx 0c0fjpf iq2t l4av/t.qf the electric0/ic2 qq fl xcjt. )vft430bap field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudeq .tmq4ao8 tp1.bm/ ac of the force experienced by a 1.0 nC cham8q1pb.a / camt 4ot.qrge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and arzcwpbxr6iar j8 ma07; 57(;riyjjg;ny *gn8re separated by a distance of 4.0 m. What is the electric field at a point midway betweenj;wgcrz p0;xb8a;nj8rr* 5 a r7 m 7i6gynjy(i the two charges?

  A 5.0-mC charge is plaa0sfe ( ;b -m0 .f/4umdxqyyhoced at the 0 cm mark of a meter stick and a -4.0 mC charge is placx4amq- (0u yh; fodfsy /me.b0ed 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 markyg 5yeurtku *u0+ :bl- of a meter stick and a -4.0 mC charge is placr5ubg u -k:etuyy+0 l*ed at the 50 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/php.a 2sjbe0 placed at x = 0 and x = 0.20 m. What is es2bj/ah p0.p the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of apdjt p9-vj* 2x square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cenjjpt pv9xd*- 2ter of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cornz7( 4i(u2s8x; vzifv xg2laj ters 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 4l7jv((u svxz2ft 82iaz;xgiis the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0uy8;56 pftp 3d1tiny42ydn pv mC when it is placed in a uniform electric field.ity vtp6 p2 8f4nyy1n53d dp;u What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has (brjo n+z 7c;:8cob* gxtfbe8 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 j yrf 3j5(57 tcgru/2:wweezuin an electric field of 6000 N/C pointing uc/ r: w5yjz 7uwr35eg tfe(j2downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries p4zs-ls(gdwlt(c*u klc )2/qa charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction o /k2csldtz *clw)lu( q-g4(spf the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Whamsg,u zgs..a*t is the magnitude of the electric field 5.0 cm from the sphere's surfa.asm, u.g gzs*ce?

  A metal sphere of radius 2.0 ctoa5a ;-0b)egb c1notm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of acbg01- to5ebat o;)n the sphere?