State the law of conserv74lyakc2 z:-uuzmfp p b-ft/2ation of electric charge.

  Is it possible for two negative c.aj de 9it 1tw+to ekisdev. *c49jm7)harges to attract each other?

  Is it possible for a positiub zr6a-uoao5an,6 p.ve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk.tp k6 vdfjz y dfy1cn;(0b2 /alc/:2aa During the process the glass rod acquires a positive charge a/dy 2cy6fakj pz (0:nac/tb2f;av 1dlnd the silk

  A proton carries a

  The model of the atompx:gj aeq1p30x ; psg +r-ea1y shows a

  A neutral atom always hauvkx9x)yl)v; s

  An atom has more electvkuv;z h5zxn0a *s46gs4s*kp rons than protons. The atom is

  Materials in which the electrons are bouf il0i)(bzp686zuj e znd very tightly to the nuclei are referred upibiz6 f8(6lz ez0)jto as

  Materials in which the electrons arkh :ec7(w4lf oe bound very loosely to the nuclei and can move aboutck47e(h owl :f freely within the material are referred to as

  A negatively charged rod is br180cq(n8k( nanvljl s p8o ta2ought near one end of an uncharged metal bar. The end of the metal bar farthest from llqn8t jna(os (8ak1nvc8 02 pthe charged rod will be charged

  Sphere A carries a net positive bs)t 5ghzykfw3/h0:z charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correh/ gwt5zy03hk zbf:s)ct?

  How can a negatively charged rod charge an electroscope posi:h0da 19 xh*jrgjuhe(7h1 niitively?

  An originally neutral electroscope is go:wvvps,; 3y briefly touched with a positively charged glass rod. The electro, vp:;wy3ogsvscope

  An originally neutral elr1carb1iy,p. x 3o7i gectroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscop7r3goiar 1pxc .b,i1y e

  A positive object touches a neutral*dc,tu reu(nb 9z a.p3 electroscope, and the leaves separate. Then a negative object is brought neatu3*a,zce b ( drunp.9r the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object issqmw3g4ew .; 7u)okvn 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 object. What is the fiv.73;k4mq) nw euog wsnal charge on each ball?

  Charge is

  What are the units o/9 p3nni/m fpyf the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Tp f zhwz:)slr(guwyh 3 6f:-f0/q :zmqhe first charge is larger in magnitude than the se zpq :wyq:6mu (-:f/s0lgh) fwzz3rhfcond charge.

  Sphere A carries a net charge and spheretcf -vg3 :8hbi B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic vi fb-:g8 h3tcforce between them?

  Two charged objects attract each other with a certain force. If the 7 6up+ifwh ij.charges on both objects are doubled with no change ii6. 7wjpuhfi+ n separation, the force between them

  Two charges are separated by ago6g:am u*nc/-. ,m ryx (zruo distance d and exert mutual attractive forces of F ono(a6 -nrm: g/,c x u.o*yumrgz each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to th7k0rp rg x-,u2*inyb ie force between them if one charge is doubled, the other charge is tripled, and t gib0ik-rxn p2ry7*,uhe 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 diw 09h zpk-0n,qzvqd, tstance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is ,kp h0ndq9 zt-qz,wv0placed next to the first electron?

  An electron and a proton are separated by a2q )e0hncnj0s 5n tq;r distance of 1.0 m. What happens to the magnituren q n2snqh)0t;j05c de of the 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 x:na x;nzu3 a/m. What happens to the size of the force on the proton if thz ;nnxa3:xua/e electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cente /i5csdvrvniwt52 -(br 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.vb s(/r-tvw5i2 5 nidc0 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 centro4 /y ch )kpqlj6no;ec8id of 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 center charge due to a third charge of +Q placed at one of thek 8l6 jq)/eo ch;pync4 other vertices?

  Which of the following is 70m-io1v,jtgfb(tl u 3hui2fnot a vector?

  At twice the distance from a point cha6h ur+m:ldth vtk(v9vic- 6 1frge, the strength of the electric field

  Is it possible to have a zero electric field value betwee6+8khnf- r3wi xane 7fn a negative and positive charge along 8xfa63 7if-hnrkne+ wthe line joining the two charges?

  Is it possible to have a zero electric field value between two p jyus;m ztpto 7 p25z(0-ieds9.rh1mjositive charges along the lj.yr5ps 9 e2 m-7zoz01tsm(h ud; tpjiine joining the two charges?

  Electric field lines near psitive point chargewo8 dl4k7ylj e5/vz l:s

  The electric field shown6dxquh2ed /q j dx 32rnou4j3-

  Can electric field lines intersect in freefcf9 ; 1dmm:) tglvty, space?

  A solid block of metal in electrostatic equilibrium is placed in a uniformc5g n++e uykv5/sx kwkzi6;)e electric field. Give a statement concerning the electric field in the block's interior )k is5/;ce5v+zn+6w gkyuekx .

  If a solid metal sphere and a hollow metal sphere of equal diame2 oiz-dytgq.b,)nulet*n 2m g (0qav7ters are each given the same charge, the electric field (E) midway between the centnvqa2.dge*(l, ib27z tqont) 0ym g- uer and the surface is

  A cubic block of aluminum rests on a wooden table in a region whe+ dtz zx7q0g lzc:1z6qre a uniform electric field is directed straight upward. What can be said concerning the cha067z:zqtglcdq1 zz x+rge on the block's top surface?

  If a conductor is in electroa+vnqb 5yl-.mstatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere idl-wfk0kea,y*6 z k-that is grounded. As compared to the case without the hollow sphere, the electric field at a point dirykik6,a l d-wzk*e 0-fectly above the hollow sphere has

State three properties of con8wmgaa9 6xp4: dyer8c ductors in static equilibrium.

State Gauss's law.

  The charge carried by ogago6ein .oj ci,3m 8+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 a net char,zr*seb7zc i *ic-/w) e7 (mrb rrr1aoge of +2.00 mC. How many more protons than elect-wmie*irso b,*7)7(1/ebzr r ac zrrcrons does this piece of plastic have?

  What is the charge on 1 kg of protoxs-4t8)qn3ifi ki o9cns?

  An atomic nucleus hadc u24( fo9k6lxohd3;i-cjy g s a charge 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 c4svt ih)i d1cv.r.d)e m, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forcet vhi4s1 v. de.)r)idc between them?

  A 1.0-C charge is 15zhfak /n a2a66 m from a second charge, and the force between them is 1.0 N. What is the magnitude of the faa6a/kh6nz 2 second charge?

  Two 1.0-C charges have a forct(lfeiz. /sf( e between them of 1.0 N. How far apart are they?

  The force between a cif- i. 7q96 t1 7upwxd2ytyxb$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 3g 0a4dd8p8m cjogf7vcm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric forcgdj7a dfo0 gcp8v834me between them?

  Three identical point charges of 2.2n s -zg)x3z7a 0rd ,ohzlf5uw0 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. Wha-0 alg 7zs3r5,x 2ud)hzon fwzt are 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 charge of +2.0 mbrt x, da1ua:sk/g:3b8mgeaj+,y6+ q l9si iyC 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 magnitud s:+ /9eas 6ibq bagl, uda,xgjtyk 3i+:ry81me and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 mu 2s+bic47 v8mbo 7bo:qm zr8= 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mrmbvo 7zibmo2m:8 8sq47bu+c C at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at zadpruz gzp:69:p 0n* 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 centerur9 0pad:*pz: znzg6p . 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 atit dfr2 j-i it)e(r+5zie 9 0)dbxyor0 (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatrii)terd 0xer)y it02z-5( d bi+f9 oj 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 a:p 60qlt0ud zet (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the t6u 0lq :d0epznet force on the 5.0 nC charge?

  Three identical charges of 3.0 m glc7hvrkt; 4:C are placed at the vertices of an equilateral triangle which v4rt7 k:lhg;cmeasures 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, whicceaqvd sa88y+mj.5 t3tsp2kn bh.88y h are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero858d jas38hqa.p+ntytb8c2 e syv km.?

  A +3.0-C charge is at the op8;sfj8xw8 sbrigin and a +9.0-C charge is at x = 4.0 m. Where on the x-ax x88ss8f;pbj wis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x 0dxm*t4bwz yb+3 nmr *uc3tc 1= 2a. Where can a third positive charge +q be placed so t0zyrc41 tmcxdb u b*tw* +m33nhat the force on it is zero?

  A copper penny has a mass of 3.0 g. A t) z k-a0hr1ee ;gegts5otal 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 attrany zkwha)18q dweyp ))w8ew 2(ction of a fixed proton some distance above it. How far above the ea() 1ny8 wzde8wkh w) )wq2epylectron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nond5p ttr(91qzz y7f0 hdik1 ut4conducting threads which are 30 cm long. Both are given identical charges, and the f0z97y t hitq5tr z11(du4dkpelectrostatic 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 magn ;j dr2sos-kqf:e.0 ybitude of the electric field at a distance of 1.0 m from:.;2sdoqfy-k bsr ej0 the nucleus?

  What are the magnitude and direction of the electric field at a distancw rzi/sxk u:(0e of 1.50 m from a 50.0-nC chk ( wiu/xz:0rsarge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudxq)5knsi , f(re of the electric field at the location of the test chargnkr(,f )i5sqx e?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the +n+ubzbrx.20/so k jgelectric field?u+b0b+n/.zojk xrgs2

  A 5.0-C charge is 10 m from a small om:7 80*fmnlcso sq(/ t;d4uvc 0 likptest charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test ch;ks8/m ulq*0p omol:0c if (v4sdc7t narge?

  Two point charges each have a value o)kugnwc )v0asb r:ni/9gx5-t f 3.0 C and are separated by a distance of 4.0 m. What is the e/gck0- vb:)r s)gn 9i wnaxut5lectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a me( -5fc0srir;m t/uuvga.tzal:z2i5 qter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cmrs zt/u5u ta.rz5 m2:iig q-(lcf; 0va mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sy90uq q)eo+ta+jay o 4tick and a -4.0 mC charge is placed at the 50 cm mark. At what oq0jt+uo y+e4 ya9aq)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 placed3/4 t)6av mwd)ae+)sd pchdmf at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwaytmdc se4)6 hdd)apm/v) +a3wf between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Twfa 5ps.my72b *jjfy .he last corner is occupied by a -3.0 mC charge. Find the electricamybp.ff2j .ws *jy 75 field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the y vgeja,7s9 sik6l75ob+ +w8ekhb: sn corners of the square vn+gkb j,k 7io9es5law:7hy+ses b86as 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 actsoz /+s jj.yqi7fii58x on a charge of 5.0 mC when it is placed in a uniform electric field. What i+ix5ij7 zi. q/j8syofs the magnitude of this electric field?

  A particle with a charge o zti.5q) d gqg28k,bo)rlxcp7 od5p: hf 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 e0moovi 07v;4 rksl9cl lectric field of 6000 N/C pointing9 vllmos0vr04;c7o ik downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 + (xf -5mnvbjkg carries a charge of -2.00 nC. The ball is placed inside avb-(jnk 5f xm+ uniform 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 +2.0 mC. Wha q 0xvuxeai zu1crid ; j86i4cx641.ngt is the magnitude oqvi z.igieaj6 4cn6x0 ;rd118 xu4ucxf the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What ilk0j+sqt v 5k)s the electric fiejlk+ q0 )t5ksvld 6.0 cm from the center of the sphere?