State the law of conservation of elecvb9c wkhclb*vq-91h ,tric charge.

  Is it possible for two negative charges to attract each,;gwg l6* c+q.ztdvcuqw vxk95 .6 wky other?

  Is it possible for a positive and a negative charge to attract eqeguod zm n.lok8t.a* 5bp- 9++3ndveach other?

  A glass rod is rubbed with a pie 0;nkpy zwud8c59w.rwce of silk. During the process the glass rod acquires a positz8;p ncwyu wwk0r9.d5ive charge and the silk

  A proton carries a

  The model of the atom show-i0p ,gu iy +(w)jnqiis a

  A neutral atom always haspdt1v 92x,w c0ha)l mj

  An atom has more electrons thanq .d-tdz5-bzk)rf -nu protons. The atom is

  Materials in which the electrons ar+2i ze1z sab79pedb; ae bound very tightly to the nuclei are referred to a bi z;a7e129dp z+aesbs

  Materials in which the electronsnn-xqc f, n)ba :; 6wafmlnn,6 are bound very loosely to the nuclei and can move about fr c nwn;fnqm-6:a,nanbf lx,) 6eely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar0akbde/5ykl , u2-ov pxg3wc5. The end of the metal bar farth2go5 ,x0yv bk/epwcdua 3 5-klest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is :lneb(t (5b)v6h 8: flhctdy lneutral. They are placed near each other on an insulated table. Sphedb:eln:v( 8lyh ) h6flbt(c5tre B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an m ) d*4zt7 ejw6w-pgxhelectroscope positively?

  An originally neutral electroscope is briefly touched with a posii.ib:t3o w ;nnt:czke ;g 9v;ctively charged glass rod. :obne3ivtg.wcnc;i k;9z t; :The electroscope

  An originally neutral electroscope is grounded briefly while a l38jrtg; k1*x1mq znvpositively charged glass roj18tqlx;n zm 1v*kgr3 d is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves)b/lwy twz:vu 1t7pi* separate. Then a negative object is broughtytl/z)vp iwu1b t :*7w near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral myvignb h8057aim k,p; etallic 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 negan p,8y5a0hi7 kmvbi ;gtive 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 x+l1a b pjncja73,5a jconstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargedg yxbr; l9(af,ojv;) is larger in magngy(o9jl) ,drbv;a;x fitude than the second charge.

  Sphere A carries a net charge and sphere B is neuw si+ bvc km:h*w43vweux5:)m tral. They are placed near each other on an insulatev :bu s34*5kww:h vcmx+e )imwd table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each othe0r dhagjq lqk 70u0g /1se;e+kr with a certain force. If the charges on both objects are doubled with no ces/jehq+7 ; krg 0 ad1qkug0l0hange in separation, the force between them

  Two charges are separated by a distanc;za,xlisk*+y e d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual foxs*,ka zy;l i+rces?

  Two charged objects attract each other with a force F. What happens to oook9du12g6q a i m5d7t f*se*the force between them if one charge is doubled, the other charge is trik7f o2a*gs iuqdom9e61 d*o5tpled, 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 m. What happaluqq(w/r i:2ens to the magnitude of the force on the proton if a second electron is placed next to the first el(iraq u2/q w:lectron?

  An electron and a proton are separatedi.zexwg3*))b wx,qre by a distance of 1.0 m. What happens to the magnitude of the force on the first electronq)ewbzeiw3g ,r. x x*) if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Wxb:ioa5*y /x y/ t(dxuhat happens to the size of the force on the proton if the electrd( u:x5xtxoy/a ybi /*on is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cente,t d-v ,.xzfkb8 7qebij :p7fer 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 otherbx eqi,7v.dpf 7-kfjbt8ze : , 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 equil3kvt ld2)1uc+sf. ldb m1k4taateral 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 char v+u1t sb2ld4)lma tk.d1cf3kge of +Q placed at one of the other vertices?

  Which of the following is not a vectorx i86tupeq +0d?

  At twice the distance from a poied*qh/javzm yiu0w4 s)0 .+xont charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negjh*j a9 lo, o16qjm9hwative and positive charge along the line joining the two charge*9h9olq j om,wh6ajj1s?

  Is it possible to have a zero electric fiekrw iarv 3- duumv-/52u(w1sy6xh0m eld value between two positive charges along the1dwavx mhuu/0s-imrw6yrv-k53eu 2 ( line joining the two charges?

  Electric field lines near09z /xd bls1z.joy9 y,vipxt6 psitive point charges

  The electric field shown d7 :st8*rbavp wb;n- d

  Can electric field lines intersect in free space?16tn4etn3vk2hw 7 ung

  A solid block of metal in eqif3.a4 il 0/heje:* 0qizmp ylectrostatic equilibrium is placed in a uniform electric fze 0hea4i 3 iqjlyi:0qp./m* field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each 1entt-8oyqt nunx5 -azvz5 (8given the same charge, the e8 nne-5(qx-tzva 8o5uyn1z ttlectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region j)xqw*p) (ckvw-g 4 vsp+wrr*where a uniform electric field is direcs r+ - p)xww*kc(vj)4*wgqvprted straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an el fji3 yy6aa39fectric charge

  A positive point charge is enclosed in a hollow metallic l1:g y,whnkmh* x /o+n :bvp/gsphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere/lnnx hg:1v ,+kgbomp :hw*y/ has

State three properties of conductors in static equilibrium.p/jc.td ew.b0

State Gauss's law.

  The charge carried by one electx1f 8 oc6(cuue /5eakjron 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 ob;g1,ku 2ub/.c n7knod zgn/eem7 meboi+03a f +2.00 mC. How many more protons than ele3e nmno,;zbnc+2 .0db7uai /1obg mkek/7eugctrons does this piece of plastic have?

  What is the charge on d 2go52xro(ct.b.v5r+ sb l nx1 kg of protons?

  An atomic nucleus has a chdzpq;z 5*o*hi ex(o8earge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5jlcl z;56e.yuf,3csl cm, have charge values of 2.0 and -4.0 mC, respectively. Wha e.uys jczf,;l6 5lcl3t is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betweenex(b8j(a4.awg lkr- q them is 1.0 N. What is the magnitude oxebl8g-r qa(wj4.ak ( f the second charge?

  Two 1.0-C charges have a force between them of 17 gapmx*y 4s*eu8 9qjd* 2*k jftouuh4.0 N. How far apart are they?

  The force between a c*yf1 o2tnyy s ir.63v$30 \; mC$ 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 atb( .lf/ sfr7rq81rigre girr fr /t. (7f8s1lbqmoved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0n5 o4fpf2i 5pe 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 of the electrostatic force which acts on the fipef255op4 ncharge at the origin?

  Three point charges are p7df( .pcsdt 7tlf, sjoq;)z e8laced 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 7ocpdfet , )t q( zsl;jf78ds.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 m;0l xdtt6jw9-z*slq i(/ pmnare located 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 = -1.00 m. What is the magnitude of the force on the 3.00-mC chargei6dp xm9m; ns -*lw/q(ltzj t0?

  A point charge of +Q is placed a he6xx.zn)7 iyt the center of a square, and a second 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. What is the magnitude of the force that acts on the centerh i6xenz 7y.)x charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2q/h*qe dqklo+h 8.g9osy7;dl = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of gh o h9lqy7. sd 8d/*qolq;ke+the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Qr2 vot3di9 3vh2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on otvvdi9r323 h the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equ3o m,cx+cxu(o76dgj* syq 2jv/va0qp ilateral triangle which mou,qx3j/m(v6soc gx+y 2cjdqa 70 *vpeasures 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 and +4Q, which are separated by 3.0 m. At what po.--kgqmv y nd4int, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostat4.md n-vq-ykgic force acting on it would be zero?

  A +3.0-C charge is at the origjmmww63suur c(jp bh7)e*as n )94 fx:ma19npin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so th4wnn3j)m79 mbar ju pm shxa9u1(wef6:s*)cpe net force on it is zero?

  Charge +2q is placed at the origin ani04ob-uk n vm1aqf3o 1a;d: (qhac1ted charge -q is placed at x = 2a. Where can a third positive charge +q be plab0a;d3v :t(qco ouf 1q ek4ihan1a1 -mced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total6lxpz)6:euxjnjgq ;b x8 qu5 8 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 ufum)t,ml n 7-.h-nmt tp against the force of gravity by the attraction of a fixed proton some distance above it. How far above the electro h-,tfu-t tn7l.mmmn)n is the proton?

  Two 0.20-g metal spheres are hung fiv*7/ xqc+2wi)g lsaxrom a common point by nonconducting threads which are 30 cm long. Bothxxsic )iqlv7 ag+2/ w* 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 ha9/ku/ b bkf0j xet a)c-wehb0.s a charge of +40e. What is the magnitude of the electric field 9btaf/b0).xkhc-weu 0k / ebj at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distan)es 7raxptj ki;zc ;8zc.5k7vce of 1.50 m from a cizz57xv)sj c7tap8kk;r.;e50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the maglp5310 c 87szilmugkhnitude of the electric field 8mlchip7 lk1g3 s uz50at the location of the test charge?

  A 5.0-C charge is 10 mys lry rudtk6oa yl457y)0b03 from a small test charge. What is the direction of the electric f3b0r kus4y 5tyla)d70 yo6lyrield?

  A 5.0-C charge is 10 m from a small test charge. What is the magq5fwze- 5 dwl:nitude of the force experienced by a 1.0 nC charge placed at the location of the tw5el-w f5qd:z est charge?

  Two point charges each have a value of 3.0 C and are8m2 7 bjm8+ ggbndb )fne*bqv; separated by a distance of 4.0 m. What is the electric field at a point midway between th)vn+2 g7fbgb mqb meb8j 8d;*ne two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter smg3xhw 8y;z-r, k5f batick and a -4.0 mC charge is placed at the 50 cm mark. What isx; bafw 5gm,z8kry -h3 the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark o -3qf8aq v7lbo4z in6 psp1a,ef a meter stick and a -4.0 mC charge is place n a43vpbpqf7 6-1oiq 8saze,ld 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 j jqtzy8y e.mn.4 gv;3wwsu;)-7.0 mC are placed at x = 0 and x = 0.20 m. What is the magn u)4.3we;gwnm yy v8;zjt .jsqitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the thrn+he9md +v*.cm g fz qbxz:,3pee corners of a square of side 0.50 m. The last corner is occupied xd,h9ev3 zmmzqf + gpb: n*.c+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 py)t+mu pi wt(a8v3a+.m un:yrlaced at the corners of tp 3yuu vmmti++y)8taa .wn(r:he 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 square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unirz d2u2 +id ;k(qe b.vvu73jkdform electric field. What is the magnitude ofjuuq ke(d 3vd d;vi27z2. bkr+ this electric field?

  A particle with a charge of 4.0 mC has a mass of h zkphk3d /;n1$5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of m/ ntrc8ap9 .xj(ls3ye, thf +bass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge mubt.x(slhy n/r ft,c8p+9 3ej ast be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2eg+l0 flk1d3.t:avv b.00 nC. The ball is placed inside a uniform electr 1gf3da. lv+ lkt0b:veic 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 +2.0 mC. What is the magnit9obh -svlb8q 3ude of the electric field 5q8bhov s -9b3l.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 electrzjww*lxe idaql u73jdif*e/52w0( x+ic field 6.0 cm from the center of the sphel+ju*jx53 a we qww/(2d0lfiz*7 exdire?