State the law of conservation yd(5 pr2f:j3xvv sk9m of electric charge.

  Is it possible for two negative charges to+b9h ofxx h lplu 56hgh6u1.382enk pl attract each other?

  Is it possible for a positive and a negative charge to attract eachzqwwl0o,q3 u67s+u k n other?

  A glass rod is rubbed with a piece of silk. During the process the glaeddms )8s 5ny84nk/id ss rod acquirids dkyn n/88m)d es45es a positive charge and the silk

  A proton carries a

  The model of the atom s sdl.ciro9p8w00 p*pmrrz8y 2fd6wo 8hows a

  A neutral atom always has(a6 zne,aow+m

  An atom has more electrons thadr1 *h pwvpo1.n protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are reso e6g+7j,lp) j oxc7gferrej7 +o7gc6pxgj s)o,le d to as

  Materials in which the el f;3m1ext .gp.hgsdztp w93 :sectrons are bound very loosely to the nuclei and can move about freely w.ewg3m:hz3ts;9fpd p g.1 txsithin the material are referred to as

  A negatively charged r;-:kzti gpj xs u(8;nqhzwa2( od is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be char ju a:z(zknx gh-;st8(;qpi2w ged

  Sphere A carries a net positive charge, and sphere B is q*dygfj/ c3y+ neutral. They are placed near each other on g/q yd*y3cj+fan insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charge-4/npz 9( ia( quhyrcjd rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively c+yic1d / vuqtpa6h pb,y 71z,xharged glass rod. The elecab ,+ qvuzp6x ,i1p1cdh7/tyytroscope

  An originally neutra,hu2* ua/ nftab rt;/rl electroscope is grounded briefly while a positively charged glass rod is held n r*tnurh,/fba; ua/ 2tear it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, an*+suw wrvwyg6,r0 /sl d the leaves separate. Then a negative object is u/,wl +yrs*rvgw0 sw6brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chargeu; 8xr*uot 2bxz4r/ja d 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 no time does either ball touch the negative ojbzou2* rru 4/x;8tx abject. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constanl,qad/i.. btot $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanc7 p05jojzy91)jz m qpoe d. The first charge is larger in magnitude than the second char)qmjoy5zzp70 poj9 j1 ge.

  Sphere A carries a net charge and sphere B is neutralkh0p .wpsl+b +. They are placed near each other on an insulated table. Which statement best describes the electroswk0shl b+ pp.+tatic force between them?

  Two charged objects a qrz. jic) :q.okizk0owxo7 2-ttract each other with a certain force. If the charges on both objects are doubled with no change in separation, the force beiroxw j:ki7q.co0 zo)k.zq- 2tween them

  Two charges are separated by a distance d and exert mutual attractive f)7: 6sj:vwn ,a yoanesorces of F on each other. If the charges are separated by najswan6y7ov:, e):sa distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F.:/b gp1grjzode q-7-v What happens 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 g g-dbj:v1eqro7z p -/its original value? The force is now equal to

  An electron and a proton are separated by a dista;9m qhwtbrlr+oejwr2,p,2 m 4nce of 1.0 m. What happens to the magnitude of the f, h2lp r e m2m4brqj+o9rw;t,worce 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 hapbtfp m2 fdbd +,,n8xa 2qneh1+pens to the magnitude of the force on mb,th28,na+de2qf d+fn 1bxp the first electron if a second electron is placed next to the proton?

  An electron and a protonvwww/ 3 (tod3*z9olcnr 93fb ht/v) fw are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the elfwtvw9w9)tnhor/ 3z 3*w3f bldc/ov ( ectron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. W 8qchvtua3z ;/ow+ 8mohen a second point charge of -Q is placed at one of the square's corners, it is observe u/q8z+a3 ;8mov wtochd 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 electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of,re/a vjm.gn6 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 ce/.6vg, nejram nter charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followize5-7asooyz23 nn h 5sng is not a vector?

  At twice the distance from a point charge, the strength of the electh 59xgf+gy gi26du wt.ric field

  Is it possible to have a zero electr ;rzcsy8 e++ 6djg0gvn)w)fiiic field value between a negative and positive charge along the )g if 0d6g8 j+viy)c+zresn;w line joining the two charges?

  Is it possible to have a zero electric field v iq bw+t .xkch0tn/4ys7/ ugo,alue between two positive charges along the line joining the two ,ncqu7wis.g b/ y0/ +4httk oxcharges?

  Electric field lines s 50 zt2*dir nxb5+,ftk a9 1pzo,lvujnear psitive point charges

  The electric field shown f+ oq (3iy(taj et+ij2

  Can electric field lines intersect in free space3 whpq /kout+ gd);3w,q8ltdr ?

  A solid block of metal in electrostatic equilibrium is h(znoh,s g1u: /d gnc v;:zs4qplaced in a uniform electric field. Give a statement concerning the electric f:1hq vn;nz gz4dgscus(:o/ ,h ield in the block's interior.

  If a solid metal sphere and a hollow metal sphere ofan3r,-ybql 9 r equal diameters are each given the same charge, the elect nlqr-3ab ,y9rric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on hvf :brid+ctt5 9uj/3a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top su5/d u3vhtcfb+i9tr :j rface?

  If a conductor is in electrostatic equilibrium near an electric nzgmb 8p 4sat:i)7lq5charge

  A positive point charge is enclosed in a hollow metallic sphe3qz fgw*epyc75f5ep rt8u090/ tbxfqre that is grounded. As compared to the case withou *9rgy0qtetzwx8 f 30cb7 f5up5f/e pqt the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static wshef5s/0eq o7 g02qtequilibrium.

State Gauss's law.

  The charge carried by one electron isu1u0xu q-ryfdpm (*t* $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net c e/sb-xfuzn1: harge of +2.00 mC. How many more protons than elect/ :s xnu-zfeb1rons does this piece of plastic have?

  What is the charge on 1 kg ofks;/u psy:dmnzr0 f,r 2/u2x7l yred) protons?

  An atomic nucleus has a chaifl 4+nr- ,wgkrge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.35dwkw jk9 ax-lvjl 0:r4e2gr5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwed:gekr ra0j 59jl 3wx wvlk4-2en them?

  A 1.0-C charge is 15 m from a sx77 mbg -1ojr l6txuqi/:bv9uecond charge, and the force between them is 1.0 N. What i19bm-:i/7 xvblrg7tuqou x6j s the magnitude of the second charge?

  Two 1.0-C charges have a force between th1hqe u(; h2nztd;zym,em of 1.0 N. How far apart are they?

  The force between a vx*1/f l *ti +sht(92u;zditpi7 tbqt$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experienc - ;5fijvg*s0,vxpmnk3c8gjce a 1.0-N force. If they are moved*m vp58;jccs ji 0,f3xgg v-nk to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 a9v3ho8ncy;b+ fmi z0 mC 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 vah09o yfnzb3 i;8m+ care the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A chargfb l)wvmi9*yu /o 71vbe 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 magnitud1l7 i f)u9w/y*vovmb be 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 rtuu. g*zv. f9+4 cw3ljtaoi j:7j/dvmC 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 on3jdv/fgl..t 4ju v9a+*w iuc:j7tzor the 3.00-mC charge?

  A point charge of +Q is pq.02e y:usl :f / m5dccv3 veftz+pc)ilaced at the center of a square, and a second point charge of -Q is placed at thiv20cylqe3 v.uctc)e5dff:s/:m+pz e upper-left corner. 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 nC is at (0, 0.10 m); Q3 = 5.0 nC is e31b t2kttm-x,e 6nls 0ky f0zat 00ky6e s-lexmz 2nfb1,tttk3 (0, 0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0f l.11oe68je + zy adgnuq22te nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direct+ygeze1 u jaeq8f.no td 622l1ion of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are ,fs.mi +/qzo*llgvo xrk( n*; placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is .iz x,;*llnk+r*fm ( qvos/ogthe magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 mlgbh-pl a9wmp) 72v0l. At what point, on a line between the two chargesgl2 -b7lp0l )a 9vwmhp, 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 =7mpwnb;zkfbc v(he 6p(7/c 5v+dk+ fq 4.0 m. Where on the x-axis can a third charge be placed so the net force on i(pb ck;+c qpfd7/b7w +(mkfv hn6vez 5t is zero?

  Charge +2q is placed at the orfr 9so2 +/y+m mblhgt+igin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on i+y/hot9 rbf +mlms g2+t is zero?

  A copper penny has a mass of 3.0 :lu v8:kxr5 vbg. 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 h7e;ech6km + sn4kqg+g, pi3m gravity by the attraction of a fixed proton some distance a+ichmmg 7nsepk+h 4 ;qge ,k63bove it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point bx(uczfkj+zip he- nm.p) 1/q,y nonconducting threads which are 30 cm long. Both are give )pkje+.piq(zu1xn /zhmc f,-n 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. Wb,cwpa.zu//p hat is the magnitude of the electric field at a distcu.p/ /azwp b,ance of 1.0 m from the nucleus?

  What are the magnitude and direction of the grs85*zf7)sml xa7x xo; 5eskelectric field at a distance of 1.50 m from afx57zlas oms8 *x7es 5rg)k;x 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge.4 t- u0+z3nnov h8nea0 tbuem9 What is the magnitude of the electrt o-e03vaem n8unt+04b uznh9ic field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge2fwp/ldzh 5j* s9 /btcy4/pnm. What is the direction of the electr fpl/sz hc9dy 4pj/*n25bwtm/ic field?

  A 5.0-C charge is 10 m from a small test charge. Wha nrmk92n 9ikw5d+j4e0jrn 5pxt is the magnitude of the force experienced by a 1.0 nC charge placed at the locajrj+k 094p25n5kdne 9w rxnmition of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a dihc:94d ohx h5g o5tl;lstance of 4.0 m. W9h;goc:h4 olhtlx d5 5hat is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placvii)e8+f(1awa, gubj s 7qe9zed at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the (egz 1j,w)qi9fa e8b+asi v 7u30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC charstrwy6jo)bj fxm a af,m0 3 o7.f46nhz826eizge is o6ymhi8 062 t wnz.jaax z3 e7bf46ofmrjfs),placed 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 xf c1).zx)prq(0 t xssv)qtg/q = 0.20 m. What is the magnitude of the elctt1sx(q .q)q)f0 rpx svzg) /ectric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square dbs -am: rzj)s *8mk.rof side 0.50 m. The last cornj )m-.s rdasb*kz8mr:er 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. Charges are placed at the b 0* p2lx8xbps-im,g mcorners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC bg,x02b mpi8s p mx*l-at (1, 0); -3.0 mC at (0, 1). What 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 uniform electg;hi5*eqeuxi w.8uy8bo(c, d ric field. What is the magnituwbeix.g8*(yc o ;hqiud8 eu 5,de of this electric field?

  A particle with a char: 5b7 ky:3j/yni lxlzbge of 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 in an electric field of 60g vkl ,q;1 j,;axidtp..lg+lm00 N/C pointing downward. What charge must be pl,;v .pgj dql1t xlal,m.gki; +aced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 -r4jf,y /dtlw/ du.d lnC. The ball is placed inside a uni-fd,rjtwl /y 4 ud/dl.form 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 charge of 3st1nt;q o-x,.fhw b b+2.0 mC. What is the magnitude of the electric fiel;wq3btb ftos ,-1h.nx d 5.0 cm from the sphere's surface?

  A metal sphere of radiufm:fi .ot:n .vs 2.0 cm carries a charge of 3.0 mC. What is the electric f:foif mtn :.v.ield 6.0 cm from the center of the sphere?