State the law of conservation of electric charfy auvg6g12tda;hvg 41n a7;vzou4d;ge.

  Is it possible for two negative c ,9vr8 (vcgykzharges to attract each other?

  Is it possible for a positive and a negative charge to attract each ou;bv y-z8-zar ther?

  A glass rod is rubbed with a piece of silk. During the process the gpi xyg;rjx :(0lass rod acqui0(rix j y;g:pxres a positive charge and the silk

  A proton carries a

  The model of the atom 9b/eoeoc6b9 9mt*y vtshows a

  A neutral atom always hasa,wp5r .ygqk(c p9i )g

  An atom has more electrons than protons. The atom isjrf: axg0dhidip5+cuzm*3 3:)hh x m 8

  Materials in which the electrons are bound very ti )d;jwz:iki g4ghtly to the nuclei are referr)g4k widi;j:z ed to as

  Materials in which the electrons are bok tlvg9,t30-vvc avusvrd ( ;3und very loosely to the nuclei and can move u3-v,vvvg trtv ;l(c sda 093kabout freely within the material are referred to as

  A negatively charged rod z n5pbhkve4vzg66b*tqj h76 po t72;dis brought near one end of an uncharged metal bar. The end of the metal bar farthest from the chargegt;pbv 26jo67hk vp te*bzd n657qz h4d rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral.a3hp/ ),cwm my They are placed near each other on an insulated table. Sphere B is briefly touched with a wire py , aw/)mc3hmthat is grounded. Which statement is correct?

  How can a negatively charged rod charge an h5o 3/la c3o(yk. ,qzlohez (zelectroscope positively?

  An originally neutral electroscope is briefly touched with a posit o8mo4.o q72bs vopwm1ively charged glasb7pwmvso8o1om.2oq4 s rod. The electroscope

  An originally neutral electroscope is groundeoe,u /e7( f2kvxx+s jvd briefly while a positively charged glass rod is x,e72vv+e( sj kxou /fheld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral:p5 iu ca;abh h6d9r2a electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch dpa hc5h2i9:;rub a6a it. What happens to the leaves?

  A large negatively charged object is placed on x+c7s9 xaa fz)nui +:dan 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 th+i7s x9n f:ada)+zc uxe 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.t9xdna xu0 *4- atuta constant $k$, which appears in Coulomb's law?

  Two charged objects are sewsz z;6x.t( ojwee;h,parated by a distance d. The first charge is larger in magnitude than the secondw ozj;(e.wx ;sh6te, z charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near eacmtfuy1g)v3 .0qw lid(w j8 e7tk.bfk8h other on an insulated table. Which statement best describes the electrostatic force between i3 8gtf l.km8wdu)7e by0fkqjv(t.w1them?

  Two charged objects attract eac1uovfc o+b)zsy3c5 b .h other with a certain force. If the charges on both objects are doubled with no change in separat+c51s3o.bcvz fu ob)y ion, the force between them

  Two charges are separated by a7 ix6hf)nt eh; m98smv distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mu8; xhv)e7mh mts6fi9ntual forces?

  Two charged objects attract each other with a force F. What hapx4hj7ze- ;r:r5vdiw t2hw 3n rpens 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 3ertzv;4wrx-i5:whn 2 7jhr doriginal value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happens m q7 c0wq+)jdnto the magnitude of the force on the proton if a qwn)djc0q 7m+ second electron is placed next to the first electron?

  An electron and a pron/ow8sxd+ d3tj v,yq6ton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next n+s txjo yq,83/6d vwdto the proton?

  An electron and a proton q ocxx)c97gxr9gmw807ay 7 -5 fkayvvare separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 mx0r mvqf 9g97c7) agwoy8 xvxa5 k-cy7 closer to the proton?

  A point charge of +Q is placed at the center of un1gu *g n;4i lxl;b7mlq 6si-a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an4mx -6glug;n;lis lq* 1bn7 ui 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 on the positive charge at the center of the square?

  A point charge of +Q is placed at the g*kvez52o yx: 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 ofz* vyoeg5:x k2 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 vectb+h y-bcyu59f/pj j)0 j9; kf zgskjh9or?

  At twice the distance from a point charge, the strength of the elecj.z.o7u h:8ua,4sy,1wip td bujv:chtric field

  Is it possible to have a zero)m:x)t z:w jl 4vyclf/ electric field value between a negative and positive charge along the line jv/: c mw)jlt:xzl4y)foining the two charges?

  Is it possible to have a zer9h+fx bw8s8 lbo electric field value between two positive charges along the line joilbswh9b8+ x8fning the two charges?

  Electric field lines near psi ioxe;a+.lxvjl ox7/,tive point charges

  The electric field s3l c-(kw-ueadw /yrh. osa26ohown

  Can electric field line6nfc+i8 rt7x9; ztfej,3jt jes intersect in free space?

  A solid block of metal in electrostatic equilibrium is pl us4gu3k(dpo+upcz xbum m41(w6q(b- aced in a uniform electric field. Give a statement concerning thpp4ouqsum +u 4gb(1zmbc(w 6u( 3-xdke electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of eqjd z7ww94 w-z6-fevwx 8* zazwual diameters are each given the same charge, the electric field (E) m78 w9fxv z4dzwwzw w6*zja --eidway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region pt zmyu;*j)e 5where a uniform electric field is directed straight upward. What can be said ;p y jum*zt5e)concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electricia kh-kk2t.3u;jk-gi afp6 / c charge

  A positive point charge is enclosed in a hollow metallic sphere that is grouup/sha gwc;0( i;c0k gdo.)nwnded / o;u0isd w)hcagnc. (g0kwp;. 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 conductors in smko)m.6hk9v ltatic equilibrium.

State Gauss's law.

  The charge carried by one eln) pa1 p,*sohiectron 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 m,qnuedl5bm:e a j3 +.gany more protons than electrons does this piece of plastic havng +j3q.lem,u:bade 5e?

  What is the charge on 1 kg odv vroqdr.rt: ji(22 1f protons?

  An atomic nucleus has a charge cjn( ftkg6-8 p0ntvwsrm5 3p,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, hb rxfku)/z e;(o(q 1td+f5 mqcave charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric ;dffco 5zxq +er(k1 / t()mbuqforce between them?

  A 1.0-C charge is 15 m from a second charge, and the force 9em ,,om riakt91 rkgh9-g6sr between them is 1.0 N. What is the m9g9 o s,k9mrgei- r k,ar6mth1agnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apartx(j8 *kb-dft d are they?

  The force between a f-*d ium2p.q - g4*cynt;btc d$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience apsbm0u 0/t8reb w4mm6 1.0-N force. If they are moved to a new separ/wtr e4 m0ms8mb0bup6 ation 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. The first cha.th hmi-ges66ie;j 4m rge is at the origin, the second to the right at x = 50 cm, egt6 4hhmi .jsi6-me;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 placedye5x1px.2 .z;eqiansz: y b-x on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the .bi;ea q5 xz2:yyz1xe.sx pn-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 at the origin?

  Three point charges are located at the following r yl/),u0 5ml ata6kuupositions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What isl ,0ar y/)l u6utamku5 the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of ai/.r1 os6-z65 s sys46btbasl8kbtea square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostat- k6z41tstb6bayeai.5 8ro /s s ssb6lic 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); Q2 = -1.0 nC is at (0, 0.10 m); Q4rjt)ncr xyt 4,)lk 9e4 y;di cq4qho,3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on thetdnc,xrjy44)y r;eiqol )ch 4 , qkt49 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = h2gx ;kj/z47s 2cru;j fwk oe--1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0,x4;f2rw ;jzso jkk g-cu7/eh 2 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at (;ftb* alxj- athe vertices of an equilateral triangle which measures 30 cm on a side. What is the*-lafj x(b;a t magnitude of the electrostatic force which acts on any one of the charges?

  Consider point chargen+bt3ybc:ig8jge 0 +w s of +Q and +4Q, which are separated by 3.0 m. At what point, on a linetg+e8nwj :0 bbg c3iy+ 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 =o7.ew/6uz c1 zr5 ,bum fj4iyl 4.0 m. Where on the x-axis can a third ch zf.,6umreo 15uzi4l7 yjb w/carge be placed so the net force on it is zero?

  Charge +2q is placed at the oriaqh/;.fz -qn pgin and charge -q is placed at x = 2a. Where can a third positive charge +qfz/qnp ;aq-. h be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A totalp5cyj6o3/ x r -k3nss3efou7f 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 gravity by the attract yajt-5 a ld 1guu ,yd2;;emg()3bgnhsion of a fixed proton some distance above it. How far above the electron i u y15 nledg,y-2sg)uh g3jbt;;d(a mas the proton?

  Two 0.20-g metal spheres are hung from a common point lml.hw iqtz s/4/,k.w06b/io x *r zguby nonconducting threads which are 30 cm lonm .k4ot i06/lrw.gzs /i q,bzhulx/*w g. 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. What is the magnitude of yin+x)zbo,bu: qnq(7the electric field at a distance of 1.0 m from the nucl+in)xqyb(nq7 , uo:bz eus?

  What are the magnitude and direction of th-::crcrh oee bfj6 p91g-b9krchh,3he electric field at a distance of 1.50 m from a 50.0-nC charge?ch 1bo6gjhhpc99 fc krbe -rr:h3:-,e

  A 5.0-C charge is 10 m from a small ba4q-d.k ucu0rq3evk 4hs/ 4 atest charge. What is the magnitude of the electric field at tr4-kqvu 3e0qaasu4h 4/ cbd.khe location of the test charge?

  A 5.0-C charge is 10 m from a small test chargk xx99j3q elc5e. What is the direction of the electric field?q3lxxe 9 ck59j

  A 5.0-C charge is 10 m from a tm s+q f;yu.6 m.f*xfve- gmr4small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at t fx+-fyfv*.4e u . mmr6q;sgmthe location of the test charge?

  Two point charges each have a vh mduvn -r909e1dq 5ot+g(kj ualue of 3.0 C and are separated by a distance of 4.0 m. What is the electrmj u159ueothqv(9 +0 -dndgk ric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a mete0 mthu0jpx+-cr stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mark+cm0t -juhp x0?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick v k6zly+o )pm+g y*7zlb ,2unhand a -4.0 mC charge is placed at the 50 cmnh+l m67p+ zbgyy kl2*)ovzu, 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 ar6 :3z.n dbekl si7f+coe placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwaf. sonc:+el3z6 d7bkiy between them?

  Three 3.0 mC charges are at the three corners of a square of side 0+:lht,5;wrf0 rl gvds3nu;s u.50 m. The la ds0;r5,lf r ls:+ut hnwuvg3;st corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. 8,w.+gujo m caCharges are placed 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+ a mcg,w8.oju electric field at the square's center?

  A force of 10 N acts on a charge of7 9epx54bjpb(6qt4sk5q xd)mpd0 q g w 5.0 mC when it is placed in a uniform electric fmd4p0d j4xswq5 x65p( bqge) t7p 9qbkield. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of*+ iuaib, qlz9 $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed w/ia-ghuj,vfo; em.0 ea;7 yhin an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it tou, ea- yh.ofgjma0 ;vhe7/w; i be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed bb.o;(*xt uj qvu.er0cz)edeq7ih0* insi**ibeovt0(0.xe bdc )eq7u.qzrhu ;j de a uniform 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 charget q+feh6r:) 1u9bf: 5 bdmmmge of +2.0 mC. What is the magnitude of the electric field 5.q91 m 6der)f:eg+b f:u5hmtmb0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is t+4:verq5 6 :gp lvvo1 wrljf9fhe electric field 6.0 cm from the center of the sphere?w ovlr:q6fre1fvp 49+j vlg5 :