State the law of conservationi/( olml om.t4 of electric charge.

  Is it possible for two negative charges to attract each ot6p2,f ymhv*p,7xws0jf7 r*k1c . q*kdkkufxyher?

  Is it possible for a positivxw351t3 utlxu;38*potvcb bae and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the prb6d a4)4le cbeocess the glass rod acquires a positive charge a6 bbed4acl)4 end the silk

  A proton carries a

  The model of the atom shof7;fbqc9 oqrhng; z.9/ vhll /ws a

  A neutral atom always ha7t lh,x2u1y6ctm 8ezhs

  An atom has more electrons than protz( g:pa 8oa o7)+acz3ctph(euons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are ref1s 2i2-kggcvfu osw)3 erred to 1 oviwgs-2cg3 u)s2fk as

  Materials in which the electrons are bound very looses9 3n5ynhj -mc k(lz6bly to the nuclei and can move about freelyjnbzs m5yhn3kl(-c 69 within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal b -jp:9yt4nsfo. fwh3 t(jjr3qar. The end of the metal bar farthest fr j(oq.y9tswpn4hf-3rj :tjf3 om the charged rod will be charged

  Sphere A carries a net positid 8ivii+obsvz t(f 6e6 /(eo e+)b1dorve charge, and sphere B is neutral. They are placed near each ie (fiodi (6o1/ bb+ze8s6 v+r vdeo)tother on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope c*8yh 6 p3,grchstxj2) 9hx)rej x/s fpositively?

  An originally neutral electroscope is briefly touched with a positively chzc(; z;na3 dwc7kq2dmarged glass ro7; qac2znmkc3 wdd( ;zd. The electroscope

  An originally neutral electroscope is grounded briefly while rf:1* 6 qvefhsa positively charged glass rod is held near it. After the glass rod qsr:fef6h *1v is removed, the electroscope

  A positive object touches a neutral eleckwuhn(.y4v /j6 dqq5t troscope, and the leaves separate. Then a negative object is brought near the qvnd tw /y56q(4.ukj helectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatez tm7;-6sy po*nfw9 :eugdk6 yd 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 notkw-:m z fy 9y un66sdte*;g7op 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 t,vl;jjuekjtwy6:s 7 9he Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is large b,*( jwaxb,48rt;cy tm2oa ysr in magnitude than th awjr2c(,xtmbtby * a 8o;4ys,e second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed ne0xcs/ c4l8l oiar each other on an insulated tablelo8c/s4 ilx c0. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other 4.xmzb9)zyq2sy o xy8b1dwp 4with a certain force. If the charges on both objects are doubled with no cha4 12zq8 zw bypyb4x.9s)mdxyo nge in separation, the force between them

  Two charges are separated by a distance jyw;51 jbplu9d and exert mutual attractive forces of F on each other. If the charges are separated by a distan bpyj5jlw1;9 uce of d/3, what are the new mutual forces?

  Two charged objects attract each othmas*7pzw(fx d s9kxf+vg*4; j2y lbp2er with a force F. What happens to the force between them if one chax;p flskzym +av( fsj2b4g7 29 dw*px*rge 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 equal to

  An electron and a proton are separated by a distance of 1.0 m. What htms w -njhklr68 1xnda3)i).lappens to the magnit . njaws))i6d h8klt-r3mnxl1ude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happensy1ulp/.ix* vb to the magnitude of the force on the first electron if a second electron is placed next to l iyp*uvx/. 1bthe proton?

  An electron and a proton are separated by a distance o9jbfakr)9r yn7* w afik) (n;mf 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.ybf;fra()kma)9n7jk in w 9r*50 m closer to the proton?

  A point charge of +Q is ptz(/ av 7er7jwlaced at the center 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 el7zr7j /te vwa(ectrostatic 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 tmo.a bn6 c)yp-riangle. 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 charge of +Q placed at one of the other vec yn.6bpa-)omrtices?

  Which of the following is nohqs:g.jtm8 wq4 m+e/zt a vector?

  At twice the distance from a point charge, the strength of the electric field 8ck0wx *j9jnx

  Is it possible to have a zero electric field value betwet/w 0k3rfi updv-in;c( 2rgd( en a negative and positive charge along the line joining the two charvg(udi0 -n2iwdf/p( ctr kr;3ges?

  Is it possible to have a zero electric field value between d,b wa,8 (hlcgtwo positive charges along the line joining the two chargescg w(,8 lhbd,a?

  Electric field lines near psitive point cx73d8x-hs--ucmx umv c 6 tcn)harges

  The electric field s0hdi :lswe8 1ahown

  Can electric field lines intersect in free spach(bft t1* kbp8e?

  A solid block of metal in electrostatic equilibrium is plathr2 )p1 1ok7bh liqn9ced in a uniform electric field. Give a statement concerning the electric field in the i1nptrhq obl1 k7) h92block's interior.

  If a solid metal sphere and a hol3r :)wcu6gb splow metal sphere of equal diameters are each given the same charge, the electrg6pr3c wb:us)ic 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 uniformiisy-c3h rb2g kf)4:h electric field is directed straight upward. What can be said concichf)ks i: -bhg24yr3 erning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chvkdb :ibjn em:g 1q2 v4kt;5c+arge

  A positive point charge i.rapty,,qc2mjr6 r z/ s enclosed in a hollow metallic sphere that is grounded. As compared to the case withoamr2r6r j,,ypcz . /qtut the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equ0p.v +; .1coew jmbycmx)u m+silibrium.

State Gauss's law.

  The charge carried by one38zdc7r++l z cverv 8s 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 mi :k.e5l*9q:n hs)xhg7uy5/xueeoae any more protons than electrons does this piece of plasti ksn5a7o9e:. hey: ux xeei/g)uqh5l*c have?

  What is the charge on 1sds/9ydb od 6k6c(mnta,fu-7/;zh gq kg of protons?

  An atomic nucleus hassno82k:x uzjytt.z3 8 a charge 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 chagjw a(i:4gwdtgzh s6difr3t3nes:du-;8 4f;rge values of 2.0 and -4.0 mC, respectivel36wjrd4ass3-f du; :ng hf(g ;tzw te:8d4 iigy. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a secopn-,1y rc1g 40 dlkvit1ut 5rnnd charge, and the force between them is 1.0 N. What ip dc14it1t 5n- g1yvnr0k ur,ls the magnitude of the second charge?

  Two 1.0-C charges have a force*ojq 3d;skf:wyfxc 9* between them of 1.0 N. How far apart are they?

  The force between a j8ubv )6yu jjq50ysm9 $30 \; mC$ 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 f gw*1 z2z3yhjoqe, r(rorce. If they are moved to a new separation of 8.0 cm, what is the electric force between tgweyjh*,1(ro qzr3 2zhem?

  Three identical point charges of 2.0 mC are placed on the x-axis. The fo 6kfmlyfx ,*)irst charge is at the origin, the second to the right at x = 50 cm, and the third *f6,mol x )fkyis 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 arebe1wfni9nw*a.j d ++c placed on the x-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. What are9a b+w. if+cne d1*wnj the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.))y-qodeqk y t9iuem+l ,ir(6(z:gdv 00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magniq -)zi6edmqe,( rk v)y( +gu9 tydli:otude of the force on the 3.00-mC charge?

  A point charge of +Q is plat+o6(e0xbj+o uup ; tdced at the center of a square, and a second point charge of -Q is placed at the upper-left c(p b6t +u 0eu+d;ojxotorner. 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 (0.383f;evira*u ( ws)wjovy -d-q0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the masa;u-r i(fvy -qo3w v jd8e*w)gnitude 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 m),bip61-py f99t ob, bm stq-bf; Q3 = 5.0 nC is at (0, sq-yt 6-1bpf ,pmbot,ib99bf0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral s5 3lh*/uw a ms6mktj/tri3ts5 6mh*mu asjw /k/langle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated bywom+ppfy0w :) ff;g7o,nl 4br 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 forcw4 + :,orb; g oppfwfynf)l07me acting on it would be zero?

  A +3.0-C charge is at the origin anosa;.f6 g nc* ,)k ( 5dmsns+i7pxb7fym0pwwyd a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zero soc)0kd(iswgm7yanm,6f7y f5 ; wbs+.*pnxp ?

  Charge +2q is placed at the origin and charge -q is placedxq z6h/1ll q wcbc*.-g at x = 2a. Where can a third positive chargeqbw/-cc1 zl6qlxg . h* +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. 7 :kt9hk4ipue 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 against the forak1/3u w3fojh) og*ubk c4w, rz2)jpuce of gravity by the attraction of a fixed proton some */2 jo33j ha4cz)w fu,1pogb w )rukkudistance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres ,; n5fropbep6are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the an e6o5 bppf,rn;gle 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 elect2byvy2bz3r4z q;maw / ric field at a distance of 1.0 m from the /2vy; z 32wm4arbyqzbnucleus?

  What are the magnitude and j; fm96j s4wxv(xp: +8xrobondirection of the electric field at a distance of 1.50 m frorp(w46mj:xb o 8x+sj fx;n 9vom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magn e,j4zcc 7qu3k r17ap4ktqk*h itude of the electric field a car* t4qkuk37 pz7 ejc1,kh4qt the location of the test charge?

  A 5.0-C charge is 10 m from a small test cx)kitz3ug 0sxt2b,1 ctsv;. j harge. What is the direction of the electric field0;i s xttg,.3j )1usb ckvx2tz?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude ofocdl6cenv30s+ qgta h9o;a4- the force experienced by a 1.0 nC charge p 3shevlcod46to -+90 acga ;nqlaced at the location of the test charge?

  Two point charges each :sf b/ qmrimalo1 mb8v6 p;v(5have a value of 3.0 C and are separated by a distance of 4.f (1;imm5lo8qabpbvr/ ms :v60 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0q4;uc vq y8iu .fjdt(r5oe/p6 mC charge is placed at the 50 cm mark. What is thequ( 8 q4uc/ft6ervdo;.y5 p ij electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mhe :q.gvz ,ko,ges:xjx3 n:o.ark of a meter stick and a -4.0 mC charge is placedx.: ,sgkoex:.:onge vqhj ,z3 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 placed at x = 0 and x = 0.20 9z3l2nokp,wq m. What is the magnitude of the electric field at the point midway be,kzp9 n2owql3tween them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The qt ,x.zz m3tl3-s1iiplast corner is occupied by a -3.0 mC charge. Find the electric field at the cent-. z, s3ipz1q3mtixlter of the square.

  Consider a square which is 1.0 m on a side. Cht ,d+joch m dky;*q.+oarges 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). W ;dc.m jd+,ot*okyq+hhat is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unifo5osg+c g*ein6s(, o j)qx5x,csjs* f brm electric field. W6,* se5sccsx* n fg+5boxijsg(oq, )j hat is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has amzycodr+no02 fdn05 2 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 60005zg-/o5rchro *s3 rqk N/C pointing downward. What charge must be placed on the ball for it to be suspr5r-*/ qrc gsohkoz35 ended?

  A foam ball of mass 0.150 g carries a char vh-:,bctf/z gge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of : ,fh/vzb c-gtgravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnit5iuj+sd5)k v3w ztpx, ude of the electric field 5.0 cm from the spher5iz +t ,udpswv )xj3k5e's surface?

  A metal sphere of radius kx73u3 klwdg 32.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center wuk3d3k gxl73of the sphere?