State the law of conserkv.na w nbf;3nm2 ,qv(a:yb8bjai 01jvation of electric charge.

  Is it possible for two negative charges to attract each otheau4*xds7n qun mqz x9f .+p6s4r?

  Is it possible for a positive and a negat 8m0 vumj7c5nkive charge to attract each other?

  A glass rod is rubbed withz 5cu ioq,u6-l a piece of silk. During the process the glass rod acquires a positive charge and the sil,6iq -cuul5o zk

  A proton carries a

  The model of the atom sdu q vg y)b*hw*5-:y tfdrp71yd1ws-shows a

  A neutral atom always h )s:zflu yt o*1vtgti )9jrk7-d(v p7kas

  An atom has more electrons than protons. The atje;mvwu--aq /2ffx5wic 7a3z b)(rhnom is

  Materials in which the electrons are bound very tightly to the nuclei are dl7ageg35 x+zd7 .qgdreferr+dz7q.l5 exd3g gdga7 ed to as

  Materials in which the electrons are bound very loosely to the wsha:(9- - pybwk sw5e y.q;eonuclei and can move about freely within the (pw.o;ak95qy:e swwheb y s-- material are referred to as

  A negatively charged rod is brought nea wl 4.v.z49*f eqtiph opx4bw6r one end of an uncharged metal bar. The end of the metal bar farth*p.p z44etx.lwbhwo 9 4qv 6fiest from the charged rod will be charged

  Sphere A carries a net positive chasj9c ep97 z4ojrge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wij9s9je4 o zpc7re that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pos lr jxsbat+k* 7f05, vhn9qj5uitively?

  An originally neutral electroscope is briefly tocvw / 5/xculm9uched with a positively charged glaw cucxm /9l5/vss rod. The electroscope

  An originally neutral electroscope is grounded 8nk f6ifg yk4 k9 ww/jjy24gnl.bf(6 ibriefly while a positively charged glass rod is held near it. After the glass rod isif n gnk klyj4jk 2/(8g.964fyfwwbi 6 removed, the electroscope

  A positive object toujx4 3gc0ibfpm(6xf, k ches a neutral electroscope, and the leaves separate. Then a negative object is brought near mp0x gfb6icf 3k, xj(4the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulag 8 ya 7zs,-e/o;adsyj)e; ilxted 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 negas,; );7 - xe/lsegzyi8dyoaja tive 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 of0 wsjr /rvv4l8 the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance dia ;mck6 oag rj38mcn*+h7j/ d. The first charge is larger in o mn r78hjm/63*jaa ci+ckdg;magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They ar dvyqogj3vt i3n 8f2a,8j3 aj0e placed near each other on an insulated table. Which statemenj jf noagd8vt,av33y2 8qj3i0t best describes the electrostatic force between them?

  Two charged objects attrachy6ke :yl 11gf0tek5s t each other with a certain force. If the charges on both objects are do 1 l:0f1tseey56kgk hyubled with no change in separation, the force between them

  Two charges are separated by a distance d and exerrwgfbiyd/2 te*n i*zp)h0) u.t mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forcet/)znd*gf0w ih*b) ye. ui 2prs?

  Two charged objects attract each other with a force F. What happens to the forc9cbq tf61ze viyrc61gl:on.) e between them 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 equqc)ni6trebz .cf:6 1lv ygo1 9al to

  An electron and a protc(udlo lx92v*c80jd gon are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to ldo *c8x2 u 9j0cv(gldthe first electron?

  An electron and a proton are separated by a distance of 1. g):u :fqbrlqc4)k oo.0 m. What happens to the magnitude of the force on the first electron if a secondgo::lbquoc) k r.f4 )q electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happvdi1t7cs, b0uens to the size of the force on the proton if the electron is moved 0.50 m cl ,1ib0udsctv7oser to the proton?

  A point charge of +Q is placed at thep1t1+p ad so+j center of a square. When a second point charge ofj1 p1tsa+pdo+ -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 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 equil9nwb*;2elnoi a4 t5seateral triangle. When a second charge of +Q inb 4;a2 9 inte5wesol*s 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?

  Which of the following is not a vec 6y+7w 0rxgb0 buv4iystor?

  At twice the distanc)c4jhap 2x+9vhn;k /2kvogt fe from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between 2v0ufzpv2mdb(,.(y5o hcxq x a negative and positivvh,2(bm .u0 vf o5z(cypd2xx qe charge along the line joining the two charges?

  Is it possible to have a zero electr;gcsxlz:2.n l ic field value between two positive charges along the line joining the twolzg xl ;2n:cs. charges?

  Electric field lines near psitive point chargea/ot30gx6**nbto lt vs

  The electric field show; ;+rntwssn(sn

  Can electric field lines intersect in free npg qm; al(cf p4nfq76ljl+ za77-yrun+: yp:space?

  A solid block of metal in electrostanwr3ba0 ns6(io.p2(g97w:8h3q htyym peil j tic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in thjhs3 tng3qwmp.p2 iyli o(:a wy9r 6b78e0n(he block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each ;xig5w aue49rgiven the same charge, the electric field (E) mid;r eu4iw 5ga9xway between the center and the surface is

  A cubic block of aluminum resojdhzj(wzl(q3g+8u k j d:b00ts on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the cha lq(zhzj w3kd (jou0jd:b 0+g8rge on the block's top surface?

  If a conductor is in electrostatic equilibrlrbt-0mtpw3 h qtojg6kc8r 7a)7lv:sf6 u8s6ium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is 53ar/it1t+vxvaarw 1grounded. As compared to the1ra+v5vtax1a3 t w/i r case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in statit2fa yza ; z-;q6plu,vr 1nvz;c equilibrium.

State Gauss's law.

  The charge carried by os :tqyh; ewk s/ld:g2+ne 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 0uzl(w*jw,8s wz 4x fra net charge of +2.00 mC. How many more protons than electrons xzz0jwf,ww4 u r8(l*s does this piece of plastic have?

  What is the charge on 1 kg of przwnqx-gl .eg; ypg /yxww6 / l01 4dcw)apf/o4otons?

  An atomic nucleus has a charge kqnn :xsarqr/zm-p8 2*ct*qah ;s: + zof $+40e$. 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 charge vvta,l, k*g,e values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forcev,t *,,vl akge between them?

  A 1.0-C charge is 15 m from a second c+xk( fwla, lx 2klu:6aharge, and the force between them is 1.0 N. What is the magnitude of the secw(lxax:f ,2+6lualkk ond charge?

  Two 1.0-C charges have a force between themo-y 9xj3lt9 om of 1.0 N. How far apart are they?

  The force between a j bh5 b;:wz; q0wsfp b/7zzqyll t6u lou955l/$30 \; mC$ 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-a,a;c*fuviz0g 5 .i-e/z uj nwN force. If they are moved to a new separation of 8.0 cm, wha cg5;.unazje *vw-i0 ,ua zif/t is the electric force between them?

  Three identical point charge rjzdxss- 1alj2l/ l-4s of 2.0 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 are the magnitude and direction oxlrjz4-l-j l/s2as d 1f the electrostatic force which acts on the charge at the origin?

  Three point charges are pvjdontxc+7 a6vt ug/jzs,+fi2 p 9-;flaced on the x-axis. A charge of +2.0 mC is placed at the origin,d;txzsn g/9 jt+a7 fvo- j,iuc6pf2v+ -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 force which acts on the charge at the origin?

  Three point charges are located at the followik;txfbs5 p8 ,h;ihr 7jng positions: 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 3.00-mC charis5 h8;b ,hk;p7rjtfxge?

  A point charge of +Q is pin(s7.oh:pn o.xni 1hlaced at the center of a square, and a second point charge of -Q is placed at the upper-left corinohphn:o .71(i .sxn ner. 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 (00qlma s40x8cu.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0l4xsu0 mc0qa 8, 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 = -1.0 nC is at (0, 0.10 m).rau1+b9yhkdfv l.-o; Q3 = 5.0 nC is at (0, 0). What-9 akr.fyubvl.oh1 d+ is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mrq;c3eicg6 yv z f:7-rcbvqa0 :;lwh0C are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatif: cr30q0 a6:qrv-w z7y;h lgvi; cecbc force which acts on any one of the charges?

  Consider point charges of +Q and 9ep6mw 7bpey, +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a9emy p6, p7bew 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 = 4.0 m. m91xm;/x. fg;oqvh) r gv4jjf5z fm.w Where on the x-axis can a third charge be placed so the net force on it;x5v;94 jxf.j rqmf 1hof.w)/gmg zmv is zero?

  Charge +2q is placed at the origin and charg 9q sbhjxuf5*hel0a8v++m8r ge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on+ml8h *sg095hx rjbq+f8ua v e it is zero?

  A copper penny has a mass of 3.0 g. A total a oenz. )wnu/ u9ta:(bof $4.0 \times 10^{12} \; electrons$ 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 2uv du:s jh 1krlel8yut(l-;(by the attraction of a fixed proton some distjvlu ;1el:(ks (l-2yht d u8urance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common po2zh yy5kp,;a sj t6 r(-x9(th adm;hgoint by nonconducting threads which are 30 cm long. Both are given identical charges, and the e; kay9t5hor z 6yj-, m(a;hh d(xsg2tplectrostatic 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 chargek,8j0:hx yb4bsj 7s cm of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nu8 mh7 ks,4cys:jjx bb0cleus?

  What are the magnitude a 3:7yn1 emylpdnd direction of the electric field at a distance of 1.50 m from a 50.0-nC charge?1n3 y7ed:ymp l

  A 5.0-C charge is 10 m from a small test charge. What is the m5cgw ,zs5q *nq :bp/ ustu4uv.agnitude of the elecuss, q/ c45ng upz utv.*w:5qbtric field at the location of the test charge?

  A 5.0-C charge is 10 m from a 5 p22rnai(rquff 91lta k.l: jsmall test charge. What is the direction of the electric ka.iqrlj5 tf(u fn2:9p2ar1l field?

  A 5.0-C charge is 10 m from a small tesp6y)j+qu1b yrt charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the lou1y j qbpr+)6ycation of the test charge?

  Two point charges each have a value of 3.0 C anya izc.o)kv p(pj05f y)+3diod are separated by a distance of 4.0 m. What is the electric field at a point midway betw30)p y .f ki5yiodzojpv(c+)a een the two charges?

  A 5.0-mC charge is placed at tnh08 3j7vk8.k ldr rlihe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric fik .lk 8 d8rni7rlvh30jeld at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stc;kl4d dq+ +bqick and a -4.0 mC charge is plq+c4k ;l+dbdqaced 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 = jbra gr+ wg: w7l;ca330 and x = 0.20 m. What is gw7:;rjbar3 wg+l3ca the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sidjfah3z y+8p/y e 0.50 m. The last corner is occupied by a -3.0 mC charge. Find thezfyah j8p/ +y3 electric field at the center of the square.

  Consider a square which is 1.0 m o2f*tv.0rh bfq7 hs 9pdn a side. 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). What is the magnitude of the electric field at the bh*9p2 .qhds70tffrv square's center?

  A force of 10 N acts on a charge of 5.0 mC wzaqw1m4et0 v,+o fy( zhen it is placed in a uniform electric field. Wha0qo,zfvm 1yztew+(4 at is the magnitude of this electric field?

  A particle with a charge o9;-sq4 zex ph5i v ddk2k0opr;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 plaw//*3 7l;c epbsscdpl ced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball fo cl*s3sdblwp;7 c /ep/r it to be suspended?

  A foam ball of mass 0.150 g carries a charge ofp7 e;/wd ds-jn -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction nd; j/7s ped-wof the electric field?

  A metal sphere of radius 10 cm carries a charge oxo6sd:isy9b. ) n*4liryxb, t f +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sp6bs x):ir yibx9 *d,.4nltos yhere's surface?

  A metal sphere of radius 2.0 cc0p7o2v ykkyj6 s4phcso:h,f8,agz*m carries a charge of 3.0 mC. What is the electric field 6.0 cm from the*oap2vc o0 46yh7 ksgh8s:ckf ,jpz,y center of the sphere?