State the law of conservation of elhz(rlmag6 l+lce+2o4ectric charge.

  Is it possible for two ng w tp(g.i2a(nsjoj 23egative charges to attract each other?

  Is it possible for a positive and a negative charge to attract efe(za )ht vm;b kgf53)ach other?

  A glass rod is rubbed with a piece of silk. During the process the glass road vkl55p6ld4bhu4l1 d acquires a positive charge and the sk6lhv5la pd 1d45 u4lbilk

  A proton carries a

  The model of the atom showstht +l4pj0qj kh)sp ek(z(f :) a

  A neutral atom always has,l :iccajb7xyu,og: j1lh n44

  An atom has more electronk3utwl; 2yu1sn )x rfleca-4 ;s than protons. The atom is

  Materials in which the elect(a0kfbnyk+jkh w*7 , brons are bound very tightly to the nuclei are referred to + fk ,07a(j*bnybw kkhas

  Materials in which the electrons are 01-epb nsn8l/sfkws7 bound very loosely to the nuclei and can move about freely within the material are referred to8ns l k7fn/1spe0-sbw as

  A negatively charged rod is brought near one end of an unc b/ h.w:rs.xlyharged metal bar. The end of the metal bar farth/.:r swy.hb xlest from the charged rod will be charged

  Sphere A carries a net positive chargec/8) lu :z6kzdeo )qs*zzr :td, 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 groun zrdd uzs8ez *:lqt c:)z/6k)oded. Which statement is correct?

  How can a negatively charged rod charge an fhk awz8j/9y6ve 1z.v electroscope positively?

  An originally neutral electroscope is briefly touched with av5hm2y +uj5o+mbed)s positively charged glass rod. The elm+y2 u5j) +mvodbse5 hectroscope

  An originally neutral electroscope is grounded briefly while ak ekw9. )dr1 *y;sktja positively charged glass 9k 1t;kjd re*kw y.)sarod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves seobdv o5+d)e1q parate. Then a negative object is brou)1o+5e qdbd voght near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is pl-sjhhk92 ,zv baced 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 negative object. At no time does either ball touch the negative object. What isk,shv-9 jb h2z the final charge on each ball?

  Charge is

  What are the units of the Coulomb conik j/oo m t1v5gs25k7pstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is largetaq,cr2yq at3 o)m 3j:r in magnit3otj m,qa qry)2c at3:ude than the second charge.

  Sphere A carries a net charge and spheru y48fm)outcfj 8z+es(ybk) mz 35c/qe B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrost8bs5m f f zcyjk(4 u)/mcqtze8y+u)o3atic force between them?

  Two charged objects attract each other with a certain force. If the chargetdtf p*4q .t2es on both objects are doub etq2p .t*td4fled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive5e1w sr);k vc6krbt2n forces of F on each other. If the charges are separated by a distance of d/3, what are the nec;5kk1r6tvbsr)2wn e w mutual forces?

  Two charged objects attract each other with a forcr wjvw.m-x95be F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation diswwv 5b-r xj.9mtance 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 dimxnn4y 4d8+xa58u ah nstance of 1.0 m. What happens to the magnitude of the force on the prnxa+8d n4y8nh xm 45auoton if a second electron is placed next to the first electron?

  An electron and a proton ax2 ngi +xyct:3re 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 ne2cgi+x:tn 3 xyxt to the proton?

  An electron and a proton are separated by,j f 9+a)jgpy02okahkq87qml a distance of 1.0 m. What happens to the size of the force on the proton if the elo fqa9kpj 8gl270h,q+mkjay )ectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the ky7x1 vw /)tqjcenter 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 y7)kjq/t1 xwvthe 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 centroh ynemms.hcj./xvqg m0-(rtp0 i+ddje - )g :/id 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 d-()/vjhtjd..m+ p-mn/ cixg y 0qmhr:0egse charge of +Q placed at one of the other vertices?

  Which of the following is not a vev0xa6mp6mlg h9l oa,/ctor?

  At twice the distance from a point charge, the strength of the electri z 0eqv0yfzyaxht g 5rb82.i32c field

  Is it possible to have a zero electric field value betwet,xlfhfh5q 9i) v e,b.a3zf u,mu 3zn yq4ik24en a negative and positive charge along the line9mvq ,f3q,zt,4. h z2y5 ih likff4anxuu) 3be joining the two charges?

  Is it possible to have a zero electric field value between two posi(/ w,hrfgm: fdtive charges along the line f(h /m g:,drfwjoining the two charges?

  Electric field lines near psi 8r (zell )lwp;7cbj+b zbd(w w,hu56ztive point charges

  The electric field shown)15lq,v4go)ft h :w5bjqu weo

  Can electric field lines interseiemrw);( p hj ygj20n7ct in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uzcl. 7a)x kyg c3vsi:/niform electric field. Give a statement conceik3g.) saczvcx/: 7l yrning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are2-3mzsm lb+n n each given the same charge, the electric +ln mzs-b2mn 3field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a ree-in0u6-nvwz s ;w* 8 vyjp(dmgion where a uniform electriiwepjnw (; 6vm su*d0 z-v8yn-c field 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 anwlb wu3n7( qev/fw03i electric charge

  A positive point charge is enclosed in a hollow metallic sphere tha),zzsm);kgy7hfd:pg.t: ye2bk v 7fgt is grounded. As compared to the case without the hollow sphere,mye:k t7 ;) .2z, gsfyz)df7gvkpgbh: the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.-e+idg e7))sg6+0ch uinrf hk

State Gauss's law.

  The charge carried by one elehtv x wqu2nbb29-3w/u ctron 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 3zosbl3fou/lfnf 5+ ,any more protons than electrons does this pieceusf5fzb+ o/,fo 3nl3l of plastic have?

  What is the charge o5)zj -hf8j 0v tl +.bhthzcj+gn 1 kg of protons?

  An atomic nucleus has a cqs/i3d r 49tcmharge 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 chargm)8*pf ahk; 2*placf fe values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betweenf2*8l*mp a; fpafc )hk them?

  A 1.0-C charge is 15 m from a suszvz);)xe rk5a3m/oecond charge, and the force between them is 1.0 N. What is the mag3)ezz/; ok xsm5 )ravunitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0zp9t gog cr7n:t.--p : 8jrixl N. How far apart are they?

  The force between a + pg7dhed3h;qm ) u l)p1ty0th$30 \; mC$ 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 forwqq:bi b :ug*b/p-rp8ce. If they are moved to a new sequ* :b8p: rib/ bpqwg-paration of 8.0 cm, what is the electric force between them?

  Three identical point *) upeo .wrk 2o8uua4dt m/un/charges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second tot8.d p u2ma *)/4u/uenurok wo 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;5.ote(bj k :,gh spez-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 5be5zh ko;,e(. g sjp:t0 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 positions: Q1 = 2.00 mC at;zmh9i:ss( sj-o:7f op zm*ut x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 =jizszm: :o uosph;tm 9-(*7s f -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 uucea,eqr pkazxg; (+mcew9*yg :lfo:/ 0r *5 is placed at the center of a square, and a second point charge of -Q is placed at the upper-left corner.x(uoaa; ee*g lwgkfp:+zr,q c *:9 y05ruecm/ 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); Q2 = -1.0 z j;a)dqa+.bq nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5b qdzj)aq;a .+.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 =o z*tez:k 3ff* 5.0 nC is at (0, 0). What is the di*k3e*f ftzzo:rection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices o0/.cwiar c. epf an equilateral triac./eicr. p 0awngle 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 *dksxq-a a/,:3 rgea gand +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 actink x,rsg 3:g*da /a-aqeg on it would be zero?

  A +3.0-C charge is at the origin ulwo gl,e7b +85pm+qsand 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 87l ++seq bm5,lgupwo on it is zero?

  Charge +2q is placed at 7estk ,wrk z8)i xy/9othe origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed /rxz y9swktik7)8,oeso that the force on it is zero?

  A copper penny has a mass z2y 7d2kozatp :2v/tmof 3.0 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 against the force of gravity by t 23ufsfahb,3 ugkd/;i3k-b xuhe attraction of a fixed proton some distance above it. How far above the electrof3s k,/ dugixa2bh3uf3k;b-un is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threada.m3 m*e w/bpds which are 30 cm lo w pd/3ab*em.mng. 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 thv- tkgp 5pax)3q(elap-5s u9qe magnitude of the electric field at a distance of 1.0 m from the nucle pp 9sl3-tv(kp)gqxq u55a-aeus?

  What are the magnitude and direction of the electric fytrc hmw4k)*chq0 wuur w099bwx-3 7pield at a distance of 1.50 m from a)3q94hwcyhcwrtk u9rb007x -upm w w* 50.0-nC charge?

  A 5.0-C charge is 10 m from a smv:17;xzs b sgdall test charge. What is the magnitude of the electric field at the location of thebdv1sg;x7:z s test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directi tklbnyrm +8m+7-0hyvon of the electric fie8+ylk- bmhyrvmt+7n 0ld?

  A 5.0-C charge is 10 m from a small test charge. mgcj af.l4 1bi6jh ()rWhat is the magnitude of the force experienced by a)bl1ga4h(rm 6 ijcj.f 1.0 nC charge placed at the location of the test charge?

  Two point charges eac-xouzi . c35we2lik/ 4lgoe(eh have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a pointc3x 2g-lei oe lui(/5e.4wokz midway between the two charges?

  A 5.0-mC charge is pg ;/eyb :yasr 44pfqkz29-gfvlaced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is vb-pf;zayf r:e29k4ggys/4q the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a 009xv xy q8vvpmeter stick and a -4.0 mC charge is placed at the v9y vqpx80vx0 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.g w yhzo9qn.o .1;*s6bgph:4s(za mji20 m. What is the magnitude of t sigmhpqgsbo( *.h9z :ayn1z wo j6.4;he electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a idq8bkhp ncxw;8 *y +4square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field ph qi;8y*wd+n4b cxk8at the center of the square.

  Consider a square which is 1.0 m on a ig8spk5 y5l cmoqc;e mu6:7o1side. Charges 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) cs5g815il6cp e oo: ;7umqkym. What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a cm+oo v5l2p2 gpco)7wu harge of 5.0 mC when it is placed in a uniform electric field. What is the magniw)goovcp m ul 27p5+o2tude of this electric field?

  A particle with a charge of 4.0*4j(h imbzy8qog s( 4a mC has 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 o 3t8rh:cyf t3in an electric field of 6000 N/C pointing downward. What chargyf 3h c:ot38rte must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carriar1a o7uu1bwj.* dz,zes a charge of -2.00 nC. The ball is placed inside a uniform electric fiel,jda1 wau*r. ob7 u1zzd, 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 charge of +2.0 mC. Wha-when p *;(.b 0zzaniqt is the magnitude of the electric field 5.0 cm from the sphere's supe* qzin .z(0-an;hbwrface?

  A metal sphere of radiwhd e*d3mc,2 ;g7raysus 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.e72d h;da*c3 ,rgyw ms0 cm from the center of the sphere?