State the law of conser,kxjchyx;y1 ; vation of electric charge.

  Is it possible for two negative charges to attnf u3.uw6z,c xract each other?

  Is it possible for a positivet2tuq 2x n) p;f6b0sfd6m,ywv and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process tr -t)t9q ;jc)oor;q5y xmzn9f he glass rod acquires a positive charge and tc-)qr rox9;o ;)9jfn qyztm5 the silk

  A proton carries a

  The model of the atom sdc6awxk8moo b2u1rfqm,i q4 f27e.y 1hows a

  A neutral atom alway:z .dipb-zyqbw xm,61s has

  An atom has more electrons than protons. Th*2 c 5hj3wgvwte atom is

  Materials in which the electrons are bou0e7.* 5(e1utaa fmj ne9x6k(heuykdend very tightly to the nuclei are referred tk5 01a .ejtaedy *euh(k9n(6euexf 7mo as

  Materials in which the electrons are hkquf : zsc,;v/ fv.*/(4uq3zhfsruobound very loosely to the nuclei and can move about fr ; zvh:,(s3/hoc4 fr/v zuukqff*. usqeely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged y jpb (5tggqxt2. 3*dmmetal bar. The end of the metal bar farthest from the charg .dxtgybjmt g3pq25(*ed rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They ara3/5eq1x wgnxf9vs n0+jkj )se placed near each other on an insulated table.+s5jn90/3fwsx )jg nxekq va1 Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pos 1h huukj+)h 87nsmcyf-x)h2titively?

  An originally neutra9s+l sscw/k3 ru.e4kzl electroscope is briefly touched with a positively charged glass srwuz/ lscs ek4+3.9k rod. The electroscope

  An originally neutral electroscope is grounded briefly whq**g6 4 j y10dplvfwziile a positively charged glass rod is 6i 1*40*ywpgql djfvzheld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate+mj:nq3uc d 9u. Then a negative object is brought near the electroscope, but dm ud+3q:u9c jnoes not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutrale2jq+9j 3j4 ddahjer . 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 firsthre jj2ddj 9.34eqj+a 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 9 frlvdr,5 b5vz5 uv 9ks-pcj0constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d.tge87y; rck6,od1 evgtn wa;4 The first charge is larger in m6nee,a;r7t o 4tg gwkd1vcy8 ;agnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutra8. dn m2jk- c) 8m v3b4obddnscoam20-4nvynal. They are placed near each other on anmv mn)yn.8do-2sbn04 k-n34 cvdm8j da o 2abc insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract p19 yq i,xpuc9g97we1j(th3 z/r cbou each other with a certain force. If the charges on both objectp/tcou79z xui1hwj139q ,9rcb(py ge s are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attrac ix8 oq)1v 00 aoymfaony8u3i1tive forces of F on each other. If the charges are separated by a distance of d/3, what a10)oi0f yixam1q8ano u3o 8yv re the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the fo b4msy ,mpj-8y1dl82yhyy+srrce between them ifj1- y8yyhss2 ,py48dyrmlb+m one charge 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 xxz-u7c2l mc *m. What happens to the magnitude of the force on the proton if a second electron z7c x*lx2-umcis placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. W6n- vh7*fhpdb7d ao:m hat happens to the magnit7ohb7 * pd:df-nmha6v ude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separagu1cq b7shb+o 9 7br7zted by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is1 7s 7rb7gbzh+bou q9c moved 0.50 m closer to the proton?

  A point charge of +Q i 7f i/xoq;msjiq,ax() s placed 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 electross7(/ai imo;,x xqj fq)tatic 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 centroid of an equilater/uu+tij0m j i4al 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 charge of +Q placed at one of the other vertices?4/i mi+tjuj 0u

  Which of the following is not a vq+ qo8ck (dr4wector?

  At twice the distance from a point charge, the strength of the4uofmw l-0l5+s,lq at electric field

  Is it possible to ha2x sbg1k2 :bfpve a zero electric field value between a negative and positive charge along the line joining txpb1gf: 2sbk 2he two charges?

  Is it possible to have a zero electric field valueh0.; l- vdanxo between two positive charges along the line joining t-nlhdxaov. 0; he two charges?

  Electric field lines near psitive poinpd1p + -zvlyicy91i g+t charges

  The electric field s21txqz j a(vh)z*6gq * ;yxblzhown

  Can electric field lines intersecz.yo ql ;0tztsqna.(;t in free space?

  A solid block of metal in electrostatic equilrrx av2 tq+txlmh*t, w+,g6+ xd ;c.hpibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's intlprtm26 .d+xh,c ha txq t wg+;,*xrv+erior.

  If a solid metal sphere 3j*v *ueeu h9 cw/dqnnn:u8tgw2hn5 (and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between t3nee n / 52j(tqhuunh *v:9g8c*dunww he center and the surface is

  A cubic block of aluminum rests on a wooden table in afj k) 4ywopn, )ay3) xhzs7:zx region where a uniform electric field is directed straight3pzof)awx,h )y 7 kyj :)4xzns upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatt( 9b3t.bvfb2 aoc:e 0zswwz6ic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere thbpnwp rj.)+i 2at is grounded. As compared to the case )2.pnpjr bi+w without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors hpb;5)8e gz 4orkj4cgin static equilibrium.

State Gauss's law.

  The charge carried by one electro .1rvndq +yhpm.vb;x:g7 e 1yon 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 2lous :y xb:*+l.fnn lkf/ )mfa net charge of +2.00 mC. How many more protons than electrons does this pi:f*b)/ of:k2.lmn yfn+xuls lece of plastic have?

  What is the charge on 1 kg of prot0o hpt/ yor- *ef/fdl7ons?

  An atomic nucleus has a charge of n*p7n lg an+ *p.778nyqioomf$+40e$. 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 chsyutha:r )mz(rs,i95k9 e 1h+xzpm*oarge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force b usx :rohry95*1 mi(semkh,) ptaz9z+etween them?

  A 1.0-C charge is 15 m from a sku o ad9ar+ *kw5akmzau 27js1+ v-z)becond charge, and the force between them is 1.0 N. What is thek *a7a2)-uz9u +j 1mkrads owb5 zav+k magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 Nh0 fx/.c yy . vw xn3,r+i o0ghwfq89p4srv*nx. How far apart are they?

  The force between a t( ijm1e)1 ea/wyfkw:( ui;iv$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart-(3 3ir oy2bmiezld,aj*aw ;s , experience a 1.0-N force. If they are move3i ;dw ar3z (e2j*o-ls,aybmi d to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are 4. 8c9fbu.6v-n1qcji syq p1g cni4azplaced 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 the mg6fnzcans c.4jy q1 1icu4-v.ib pq98agnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges ag7+xx;3c aplylj+x 10u,oikdre 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 are the magnitude an71kxa;+jyl l 0u,ixg3xo pc +dd direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are locvfdhik690 gp6yb)ye nq,5x m4ated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00fby hq0596, dip6mgy 4kvx)ne 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 (nx;l5 biop :-no6 ++hvozb(g5hjcab a second point charge of -Q is placed at the upper-left corner. It is observed that an electrosbnh(ih5+-a; co5v bp oon: g+x6j(lbztatic 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, yw2l;ih c:hekw ,.*1 bgox;5h 2ftguk0); Q2 = -1.0 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 5.0 nC charge h 52*1gu ,.yceihx;okhltgwbk:;wf 2 ?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, scdstp eqt5d,-1 bq35d 2xq.d 0.10 m); Q3 = 5.0 nC is at- t,spq3t2dddq.1 5qbe d5 xsc (0, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 ww jad333vqb;mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What vj;w3 aq3wbd3 is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of t *g6cy5 iduje4;4xcpen.n 2u+Q and +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 elegxn5npy*4.d j u6;i 2u4c eetcctrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a + d.fjn3)xs0g7ppa nj 111.h eip4vfpq 9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net .s 0q x 431 7adppnj1f ghn)eipjfp1v.force on it is zero?

  Charge +2q is placed at the xi7w *lduyhmf/ww4-mjyn5* b x :3n4korigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is3-wudynn w iy7fjkm 4mx:hl*x5 4*/wb zero?

  A copper penny has a mass of n f yb;*.qdpc*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 the attraction of a fix bs2(sj.w sdm)ed proton some distance above ss2bd(s). mwj it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from ajqmo/ fqkwg;o cur*.oo)x3jj;):/ ce common point by nonconducting threads which are 30 cm luo jjq ) ck ocmgo*qj)o;/x ;3we./r:fong. 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 iges- ci04u( dhs the magnitude of the electric field at a distance of 1.0 m from th 0 4hug(s-diece nucleus?

  What are the magnitude and direction of the electric field at a distance om eju4h;l6 n6;8 oj p1a+jceppf 1.50 m86jumpp6njcj e+4l a1e; po ;h from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small r7qujz e.3j-ztest charge. What is the magnitude of the electric field atjrz.qe ju 73-z the location of the test charge?

  A 5.0-C charge is 10 m from a sma o/n3ua.+ ymfoll test charge. What is the direction of the elec an/.fyom+uo 3tric field?

  A 5.0-C charge is 10 m from a small test charge. What a- i1vo/qw/ nvis the magnitude of the force experienced b-v owa/i1vq /ny a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have ey6tep0 l s)0,bmk k(bcb ,ox;gdrc-+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 t,b0cko;-mdbsr0xe)(k+l p e ycgb, 6between the two charges?

  A 5.0-mC charge is placed at the 0 cm m h/ t7p fli28hibc-n4zark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. /hh-zin47l it2cf b8p What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a md bki8m)kj q5)eter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zer d b8)k)ikqm5jo?

  Two point charges of +3.0 .mj n-hl hw00u)msxx:mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of th0-jxxm lwu.n )m0s:hhe electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners ofofrdlep2(57a l. a h5y a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field dre5flh (pal ao.5y72 at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placedu):bwgept/ z2 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 zg/tbue2)p :w 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 o,pjh il(a 93: iutms1uniform electric field. What is the magnitude:al,3oim ist(9u 1ph j of this electric field?

  A particle with a charge of 4.0 mC has a mas u6do:vo02cles 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 electri8i4ind jzza q(c:.g+ sc field of 6000 N/C pointing downward. What charge must be placed on the ball forsi:zqc (nz4i j. g+ad8 it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The bai83+pg y(w8 r.poiwp ill is placed inside a uniform electric field, and is suspended against the force of gravity. What ai+ wg.yw po3ip 8(pir8re the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is0c- z f79lfk7 j efq3i4nz0tpj the magnitude of the electric field-jt0l7fkpq9 fz 430 cij z7nef 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the eleck ,ajgnt*o2 o7wy,;qqtric field 6.0 cm from the centej k2o 7,;qw ytgoaq,n*r of the sphere?