State the law of conservation of electric char s5j 97t x476mveyx(di) sqc1n erkpf0ge.

  Is it possible for two negative charges to arvdwqk5t3 h t by5.n5*ttract each other?

  Is it possible for a positive and l)3:g-w9fpkw m wsb:d a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the proces zn.g.:oflc /m )k;ddrs the glass rod acquires ocl:k gzn /rm.df;)d. a positive charge and the silk

  A proton carries a

  The model of the atom s 9 n)xn7lzkx.thows a

  A neutral atom always hasj lg3/u;z.cq e9itz q9

  An atom has more electrons than protons.y vt,v;g d0ud6d i 67; p07iosojx,ylu The atom is

  Materials in which the electrons are bound very tightly to the nuclei are r g yv;g79n7k+oa4 zy/ hdmcv *gu4x*dzeferred to ash*4xg74zcday k m7;o/v dngvu+*9yg z

  Materials in which the electrons are bound very loosely twcph2n:y np4l*)xc l:o the nuclei and can move about freely within the material 2clnwpy n) *:4l :xpchare referred to as

  A negatively charged rod is brought near one end of an q1o7k- 7rtjlnbe/+s:/wfu x bapg f36uncharged metal bar. The end of the metal bar farthest from the charged rod will be charr /3j bfuxo/k-7 eatpn:1 gl7bfsqw+6ged

  Sphere A carries a net positive charge, and sphere B is neoj e:t8xnl, 5kw85ud hutral. They are placed near each other on an insulated table. e8t,j5o 85:hukwdxl n Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge t;eu.k*sy x3n an electroscope positively?

  An originally neutral electroscope is briefly touched wi ooiet(qe dwf-a-ijz44oy ip(0y7 6 8yth a positively charged glass rod.6ej( (i7yo q -8yd wiey0taoo4pz- fi4 The electroscope

  An originally neutral electrosco,g+g*q t j5aybpe is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed,,t +ja qyg5*gb the electroscope

  A positive object touches a ne7.ee,ggy 3 zpo b4.sgph 6:wtjutral electroscope, and the leaves separate. Then a negative object is bropoht 7pg w,b.gzyg4.: sje3e6ught near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an ins:8 lj0p: l 11sd8ofcemb4jroq ulated 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, an0oqd18l8jlop s 4b: rf1m:e cjd stops. The first 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 Couloqt0 z:u2 mptx6mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fir oa69/1snzng)z +vpylst charge is larger in magnitude than the segv1paln+s /)yn6 z9zo cond charge.

  Sphere A carries a net charge and s5;e+f -jtocarphere B is neutral. They are placed near each other on an insulateatefrj; o 5-c+d table. Which statement best describes the electrostatic force between them?

  Two charged objects attract ea*plc/bv,5j *xe u6ghpch other with a certain force. If the charges on both objects are doubled with no change in 5u x pv*e 6cb,ljgh/*pseparation, the force between them

  Two charges are separated by a distance d and exertohx-et 5/,. puyyqo q9 mutual attractive forces of F on each other. If the charges are separax9-yh, q/.uypqto5eo ted by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each ot ivd ude,(b4s4her with a force F. What happens to the force between them if one charge is doubled, the otheus,4d db4i (evr 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 distanc*g6vn x,d:h a7r gbwv)e of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the firsn hbr:v aw7gv6,g*xd)t electron?

  An electron and a proton are separated by a distance of 1.0 00 ,-om72 swmtqbhckdohai 68 m. What happens to the magnitude of the force on the first electron if a 0hibmwa ,s2t67mk qoc8-d0h osecond electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0,cptdo5 3nk2h-- t wfj m. What happens to the size of the force on the proton if the electron is moved 0.50 m cltt wh5-p 3n, of-2kcdjoser to the proton?

  A point charge of +Q is placed at the center of a square. When a sm9 y,/x dzn+cmecond 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 magnitude of theyn/c,z d9+xm m 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 equi im9 *akcfd qturs71;-lateral 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 s i97*d qrma;kft1uc- 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 vector?,m.fh lv4 . +z1p9rx+ ehmzpqp

  At twice the distance from a pointxp 5ikc8odl )s6wh,l5.-v iuv charge, the strength of the electric field

  Is it possible to have a zero electricgo ww8c1+8 eh tc1ugy. field value between a negative and positive charge along the line joining the two c81h c18tw wyeoc.ugg+harges?

  Is it possible to have a zero electric field value between two positive chargef::6bn(24y 3fi6pi)bcke/cz uch jwxs along the line joining the two charp46xwh(6 y3ucc/c: inefb fb 2j z)i:kges?

  Electric field lines near psitive point charges / cmndi+ ecsg75-)lrv

  The electric field shown bsk. vs*xv2g, n.-s n6:x7sqbu a-vyk

  Can electric field lines intersect iwut- af- e8be:n free space?

  A solid block of metal in electrostatic equilibriuugqe,l )l,xy 4bw-)sog7 yp.rm is placed in a uniform electric field. Give a statement concerning the electric field in the block'-s. ,) xoy,q4l)gg u7bpl wyers interior.

  If a solid metal sphere and a hollow metal sphere oa 8r9eokxy 547sq/xkuf equal diameters are each given the same charge, the electric field (E) midway between the center and the surfkk8eru 7yxs4x 9/5 qoaace is

  A cubic block of aluminum rests on a wooden table in a region where a un xxbjj h)64l ws+x.*k1;o mtrgiform electric field is directed straight upward. What can be said concerning the charge on the block's top sm.xtgjo;w*4 6)x1j bkrsl + hxurface?

  If a conductor is in electrostatic equil,a( 0px w8xo2f4kcvdkqhv: r6 ibrium near an electric charge

  A positive point charge is enclosed in a l2),o2 clnn x6n+wtu shollow metallic sphere that is grounded. As compare6wx tu22o+s,cnnl )nld to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in staq a4algx 1rj fi cv*(q4 ea6v5jg6f*t8tic equilibrium.

State Gauss's law.

  The charge carried by one elect- x)svo p9 skr+f4.wtrron 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. Hbas8w lct kd5pe/z p-k:g0fz :ak2:j -ow many more protons than electrons -jzbklps8 k2/d wac0zt a- gf:ek:p:5does this piece of plastic have?

  What is the charge on 1 kg of :) ojq;5euyyh 30xlu wk1es:ij tg**e protons?

  An atomic nucleus has a charge9 l2fd, nyq* ge:oxw)/5uk dmk of $+40e$. 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 ch;5m xxp28xy zharge values of 2.0 and -4.0 mC, respective52h mzy 8xx;pxly. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 rbh 82wrsh opm 4kgfeq,-u-.2N. What i8 q 2-o .,s4kpbu-e fhw2mrgrhs the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How fac41t:lf k sk+ar apart are they?

  The force between a k h1qo nxxny0ig,+ ;9khvj7(z$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience vt;5k5 zcmpo2*pihv2 a 1.0-N force. If they are moved to a new separation of 8.0 c 5 zopvh22c5pm;ik*vtm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axisdb.c .czb0n) hc29 dug. 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 dc nubhcd0.9z2c gbd. )irection of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC ncmftjd0(v oz4h2m, kcc.v/.is placed at the origin, -2.0 m C to the right at x = 50 cm, and z.ojh4cndv k, /c.0(tvcm2fm+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 lop4z1-tghu o /-eeb6-zt)deeh7h mz 3e cated 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 th3-htdeg e1pe)zm --u ez6z4ohh/b7 tee 3.00-mC charge?

  A point charge of +Q is placed at-ri qb72hbu/ju ,jai2 ,mmo5( nbai8 t 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 center charge if a third charge of -Q is placed i hj2b8(ra/nqo u, ,7tmj 2bmibai-5 uat the lower-left corner?

  Q1 = 6.0 nC is at (0.30pm-cx5klwx(f 6z o.p2qc.i g ( m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitgo.zi fc6cpm(5l-px(. kq wx2ude 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); Q3 = 5.0+l1x( e; 6 fmintpbgcdo+gz91 nC is at (0, 0). What is the direction of the net forcpio 1 e(9 lm+xf6zg;cg1nt+ bde on the 5.0 nC charge?

  Three identical charges of 3.0eailu5 b27 ,ol tkw6f: mC are placed at the vertices 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 ch,5 tli7lke2fabw6: uoarges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 z qhw*b2 mfa+;m. At what point, on a line between the two charges, would it be possibw+ 2 f;*ahmqbzle 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 = i82;bzi .yljy4.0 m. Where on the x-axis can a third charge be placed 2y 8l.yz i;ijbso the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.jnnc8)t/ ,+5 /shai7 l+s)ibzpfurye Where can a third positive charge +q be placed so that the force on it u clzn 5h+)r sapi +8,es/njb)7iyft/is zero?

  A copper penny has a mx++5zq5 jqq9r/l sgzoass of 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 agaiiebh, bm9palfn+u l56j,nn ./ nst the force of gravity by the attraction of a fixed proton som5j6 bnpnml i., ne ,9abulfh/+e distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common pointc /n hvh lcyz1a)436qa by nonconducting threads which are 30 cm long. Both are given identical charges, and th ac3h6c4y1l/ n)avzhq e 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 is the magnitudek w/bbu gs2 3k+-ssxhli71tt5 of the electric field at a distance ofh/t2b3g l75+u1 s k-itwsbxks 1.0 m from the nucleus?

  What are the magnitude and direu9bnh4 bo-,g ec;i7gp ction of the electric field at a distance of 1.50 m from a 509u 4n,gog7 ;ib bhep-c.0-nC charge?

  A 5.0-C charge is 10 m xl8p as6 7y-o3d, 1p1xad/8slq4x bmjjxob1hfrom a small test charge. What is the magnitude of the electric fielb4oms1p ajax x 1ls-7yxl,bpo6j3 d1q8/dx 8h d at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of thec5wqkgsrqzx+(w0 +c 6 electric field?(zc g05ww6q +kq+csxr

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of thera ae4fxfgv-z( y f0-5 force experienced by a 1.0 n fv4 -ayef zrg-axf05(C charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separj bk)8 xlme:xkf5/ lx;ated by a distance of 4.0 m. What is the electric field at a point midway between the t be l5kk):xlj8x/f;xmwo charges?

  A 5.0-mC charge is placed at the 0 cm ma 69z wirg(jeox rm5-1crk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is thm 1o59rjiwgec x6(z-r e electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and zc2mkl wybeh06tg /1,a -4.0 mC charge is placed at the 50 cm mark. At what point ohzb k/twm e2l1,g60cy n a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mCh pi4:pe8a3/n5 btsrh eva;hpj) a,/o are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric fi 8nh)iob/ jpeas,3:;hpa /ra4hepvt5eld at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The l1t2nm 1 eh77vw+ iyj/t iwuh(jast corner is occupied by a -3.0n 7ih ji1wmet72 /+vhuy(w 1tj mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargeuh,u oct0v6c8s 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 atu h,u068tocvc (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts wi7.en p tw42kon a charge of 5.0 mC when it is placed in a uniform electric fie7p2eiwt. nkw4ld. What is the magnitude of this electric field?

  A particle with a charkb j pi6r6gz81ge 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 of6z*i f6ltj1/qk7srgzn w o0d;a67hxb 6000 N/C pointing downward. What charge must be ptwr6/6xgnh;zi 0 fqsad6z 1blko*7 7jlaced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a a2ma,rpc l02h /oii 5xcharge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude a/ h2co5i p,l20raxmia nd direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Whatyn +x- o4be,zrbv uc:w g5)1ez is the magnitude of the electric field - gcx,vzyn wr+u b:bz14 5oe)e5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cyvb kq24uj xynlh:/m -b+ dn;y(u .*wcm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of ty+y/dc;x qu*:.vj2 b 4nkylumn( w-hbhe sphere?