State the law of consed c3ku2jf4cj7rvation of electric charge.

  Is it possible for two negative charges to)rs xl .+twm;-pf ci/p attract each other?

  Is it possible for a positive andr 4orw wlw91n7lh vmri-()mb6 a negative charge to attract each other?

  A glass rod is rubbed wit2la. +a(y qwwhh a piece of silk. During the process the glass rod acquires a positive chhlq+awy aw2(.arge and the silk

  A proton carries a

  The model of the atom sq1v pca7 bv /tnce)t ci8ht.87hows a

  A neutral atom always :f*y2oslq(ov has

  An atom has more electrons tha z(yf )f-lzk1je ,efcvy pucr;z)2 5f3n protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei t jpmr e8phg(t3(l z.j(x3 *;ifl 7aeoare referred j7j xh pze(3r;ga38opm (*ilt(l ef.t to as

  Materials in which the electrons pg cs)+p cr*s lc3z/v.are bound very loosely to the nuclei and can move about freely within the material are referrsgscr3zpvp *c/).l+c ed to as

  A negatively charged rod is brought near one en/d6bg v+s;w o )l;oyybd of an uncharged metal bar. The end of the metal bar farthest from the cbwg+ /y ;)6dy vobosl;harged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thwn94l0d3j:hhcr3 j njey are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is corr4nnjr9 3c l0:djw h3hject?

  How can a negatively cjz 8m)x 2/p;da;uln z,m tp 6hyskw0.nharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivj( ea2 vr/f +v f(pvuuf+3kqb6ely charged glassuvjpfav(u (ffr +k36q2/e+b v rod. The electroscope

  An originally neutral ezz mb:s(6uo:o 4g)xnilectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscopegoi):msou:n x 4z(z6b

  A positive object touches a neutral eahg6x bt:p*fegx3x-is5/ 4zc lectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. Wt6 5bp*x3ife/g 4x- gcxhz: ashat happens to the leaves?

  A large negatively charge+zccld gm 4-qm(j:7bod object is placed 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 n z(-: 4l cjgb7qmom+dco 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 constant j j puz19 12.7nnmb.p9 bf7-jpfhklkr $k$, which appears in Coulomb's law?

  Two charged objects are separated by a dlb;sz0ua8ik 4 istance d. The first charge is larger in szbiu k40al ;8magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are place74qj4ckvu riie9ae * ajs1a- +d near each other on an insulated table. Which statement best describes therec4 s v4ek q1ija9u-i *a7aj+ electrostatic force between them?

  Two charged objects attract each other with a certain force. Ixe :c . icy)qx3ul3ma*f the charges on both objects 3:cyix l)3a mc eq*u.xare doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces of(;t; ih- cm1qgln7lr m F on each other. If the m;-; qc hr7l(ign ml1tcharges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eac7syirzq /my , r,j wk- opw;mpb0-9/ish other with a force F. What happens to the force between tm,7so msrw- iyzp9jb /yi,p;q/0rkw -hem if 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 ar.cdd n(*rk;ap e separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electro.rk (*dac pdn;n is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happenbr24qvey y6e9if *8z8c1nqc zwmh(8mue ;( i ls to the magnitude of th(y4w ieh q1qz(cz v e9n8il8fb86;2 mc *yuerme force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m;k69*gxa-j) vytekncr (y: wk. What happens to the size of the force o):rywnx-yvej ac k*kg6k ( t;9n the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed an9hq,ac9 , a;*ryjsj +qd7cznt 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 magnit*dhnq7r ;a9 9an,j +ycjqzc,sude 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 a8vylsbgdq-;;x q /)q 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 thed/)- a8;qs;lqxqbgyv center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is no mi h2anf;40jv v4zdx3mvq()gt a vector?

  At twice the distance fro62knw5 twz;sa /j3d2nc fs j0nm a point charge, the strength of the electric field

  Is it possible to have a zero electric field value 2lrsp r 9 mpsm(31-puybetween a negative and positive pr 2y( sls mr39pupm1-charge along the line joining the two charges?

  Is it possible to have a zero electric fi 4.9r8bzo yshbarf/6c eld value between two positive charges along the line joining 6 .hzrr cob9 /4bysfa8the two charges?

  Electric field lines near pvj( -f/dk6ch rsitive point charges

  The electric field showh6ra-8,s gh+ yyrpk4 1r serli6v .rk:n

  Can electric field lines int80 jux j))oexbc br,ugca *qt1,3fwu* ersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elo,71s -+(4 no *y/-ri 3hlyk ogtweha4mgwfmqectric field. Give a statement concerning the eleow,qf* yk-srahi nmt+e l43 -7g 1oow/ y4mh(gctric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each g(oz1, 8 cwloioiven the same charge, the electric field (E) midway 8,oc( zowol i1between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a un nls-xws1;7tbwrqkk2v 3yw25iform electriq slkk1ws 7w;-53 tbwr 22nvxyc 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 an electric g u-ep- c0+1ur9ghlar charge

  A positive point charge is enclosed in a hollow metalkt 4sft0 0ee 5ur-yq/w gp rb,6x/kd9mlic sphere that is grounded. As compared to the c/bp rkm,krq s0ude40wtx9fgy/-5 e 6tase without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in statlp3dt ug 8u9t*ic equilibrium.

State Gauss's law.

  The charge carried by one electqgm8 9rf2be 5yron 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 protv0 vzehld1avn8t 0xrgo0. , )sons than elecasv8. nlx0d0htzv )o10v reg ,trons does this piece of plastic have?

  What is the charge on 1 kg of (i2dy4hrq,odprotons?

  An atomic nucleus has a charge)yjhpy4yn 59l of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separ1r,y +5txrgb f- zip b1nb;i+t.y+pynated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude; gbitty 1i +b+yr-n,y.z nf5+xbp1pr of the electric force between them?

  A 1.0-C charge is 15 m from a setc)ysjx .)a1w u8 pgpi,5csq 1cond charge, and the force between them is 1.0 N. What is tjy1pu s5sg.,)) c8ai1xqp tw che magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How vw3f*j8z i-xip, x et:6eg xf:far apart are they?

  The force between a 0di ;m8nwp +xu2a.uh k$30 \; mC$ 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 force. If they alcbb)/m4+ qgg re moved to a4)g ql/ bg+bmc new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 m 3) cgxuel0q7vC are placed 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 magnitude and direction of the electrostatic force whic7g l0xue)c3 qvh acts on the charge at the origin?

  Three point charges are placed on the x-axis. oj:k,-(yljoh 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 and direction of the electrostatic j-y:jo ,kho( lforce which acts on the charge at the origin?

  Three point charges are located at the following position(oiif (o1-o c7 osm eq-co-it4s: 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 is the magnitude of the force on the 3.ce (( ioo-qtoi1- mocfso7-i4 00-mC charge?

  A point charge of +Q is placed at the center of a square, and a ;a:hs/ (te ktesecond 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. et( ;hsea t:/k 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); Q3 = 6 zu,k8 nn6x,vpubp1 u5.0 nC is at (0, 0). What is the magnitude of tnu1u,k 66 8bn zupxvp,he 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); Q3 = 5.0 nqjq4. hyzpc) 3C is at (0, 0). What is the direction of the net force on the 5.0 nC charg)yq4h qzj.3p ce?

  Three identical charges of 3.0 mC are placed at the vert kuz n 7it2qj)3-qmbp;f;p6lsices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the cm7 n6jsl qt)pp;;i2u b3f- qkzharges?

  Consider point charges ;lar,91jybdrzs m q0 6of +Q and +4Q, which are separated by 3.0 m. At what point, on a line ;ra60yzs1 q bjml,dr 9between 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 origin5j59g7 nv thnu and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed jh7t5g9v5 nun so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where canes ,x,i,(awt y a third positive charge +q be placed so that the force onawet yi,,s(x, it is zero?

  A copper penny has a mass of 3.0 bk87/87obc yyzc umx,bkdh i48 b8o+gg. 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 aq np ztbx)4f8;hu+2 ukvgng41 fixed proton some distance above it. How far above tq1ut h +z k42;b8vxfnggnup4 )he electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncondud,ajsy 9 3z,cpcting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threadsy3dzsjp9,c a, is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitm0 lmoj /8+g06j1w:parh uampude of the electric field at a distance of 1.0 m from the woma ljupmgr6j180h+p/ :m0 a nucleus?

  What are the magnitude and direction of the electric field at a distanw k1w v2-5knol1lqu7ni 16flece of 1.50 m from a 16-i e q2 k15uonvwnlll7w1fk50.0-nC charge?

  A 5.0-C charge is 10 m from a s :l i.imz(u5hrmall test charge. What is the magnitude of the electric fiel(i hi:lru5z.m d at the location of the test charge?

  A 5.0-C charge is 10 m from a small z0h2l4 epo mmqo w166ctest charge. What is the direction of the electric fielhq6m6l mw40 eoo cp21zd?

  A 5.0-C charge is 10 m from a small test charge. What is the magnit5tjv/ nje,6 soude of the force experienced by a 1.0 nC charge placed at the loe, vs5j ojnt6/cation of the test charge?

  Two point charges eachn /ny7uz;ym z* 5zs3cq have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a pointy zun3s n7zmy;/q5*zc midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and 5j* of7w8vasb ;bgn,b a -4.0 mC charge is placed at7w,* ab; bj5n bsgo8fv 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 mark of a meter u7 pxzpnda3s+w8qs8b +)yz4i stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two chargeyq +84bd ) ni8+zu3w7 sxpaspzs is the electric field zero?

  Two point charges of +3.0 mC and -7.0 y2 gu988lua.ikxx +gf mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway beg 8g82iyfxluu.+a9kx tween them?

  Three 3.0 mC charges are at the thr(pcw0s 9t dw9 xg*lhucj n7:w.ee corners of a square of side 0.50 m. The last corner is occupied byj9*ncg p9 :xt. dc0ws(7wuhwl 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. Chae),jev9- ae :suqu :,io2 yaqnrges 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 e2:uv ,qes9eyu jaeonaq):i,- lectric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed icxpnvc 9 a7e*8s 4vye/n a uniform electric field. What is the m/n pcc9eavsx* 748vy eagnitude of this electric field?

  A particle with a charge opux 3y7bqb 6s.f 4.0 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 in7al b:e/vhss(j4 wkz ;f.e /if an electric field of 6000 N/C pointing downward. What charge mub7e:4/e ; kawlv/h(fjfs.zsist be placed on the ball for it to be suspended?

  A foam ball of mass 0.su7zl0r ) vgkk(n*co2s5xf:j150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, a kngsx7 20k(s v)u*rzo lfc:j5nd 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. What is the ma.htaq395z2e-p9hmmeymcs f *gnitude of the electric field 5.0 cm from the sphere's surfa5 -*ezm3fycmh9 .qph at9m 2esce?

  A metal sphere of radius 2.0 cm carries a chab8rgrge6sf 3:rge of 3.0 mC. What is the electric sreb: r3gf86gfield 6.0 cm from the center of the sphere?