State the law of conservation of electric cha0yq+a 8gtr+a. o :f1x bylqu3hrge.

  Is it possible for two negative charges to x9 1g.p -jhmaa d6syn,attract each other?

  Is it possible for a positive and avjekt 5az, ,r: negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the proces:7 v1qup*hm5u1v1l. pfkijhas the glass rod acquires a positive charge and the sil1v 1vh uph*5p:mui71fjla.k qk

  A proton carries a

  The model of the atom shows ftbj0 h)8hgid l+n/d2 a

  A neutral atom alwayhoxx f+9qhti/+y ti .)s has

  An atom has more electrons than protons. The atom x 1kr /.n(qnyk ( f1wbligh(o0is

  Materials in which the electrons are bound vetjn4(qlz. q/6- rkvy-oc2jhl ry tightly to the nuclei are referred to atqnhlj4(k-26cjoq / vl- ry .zs

  Materials in which the electrons are boundhapjz97b :9kmh dhy/( very loosely to the nuclei and can move about freely within the mypzhkd (ah9/b9j:7 h material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. 2(2sdykks(ynywjz1/1uh*iagn ys 5, .f dt8w The end of the metal bar farthest from the charged rod w* w(.hd 1tn21gyk(z/8y isyakyw j,f5d2nssuill be charged

  Sphere A carries a net positive charge, an*7 ies43xeq*veey g f0d 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. fxgys7 *ie e4ee3*0qv Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelyoeimy 3wf:y-md o6 3ps5nj- y5?

  An originally neutral electroscope is bz,e n apu45mb 7*,pffgu+yv: wriefly touched with a positively charged glass rod. The electr,y4w b*egapup5: n,f+zuv7mf oscope

  An originally neutral electroscope is gro;omw7c4dnm4za1uxl hz y67 9wunded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the cm u4wzn46dowyh79a7 z; xlm1electroscope

  A positive object touches a neutral electroscope, and:)g 9hpmtv oj7 the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What ):o9jgvtp hm7happens to the leaves?

  A large negatively charged object is placed on anz 5l;aq6wl9h ,4 mj+1jnxotsw 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 ; ,slth9n jz45wj6wx1a+qol m 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 final charge on each ball?

  Charge is

  What are the units of the Coulomb constanoou.,oifwqb, 5vlp.xk6n 7y y u- e3*wt $k$, which appears in Coulomb's law?

  Two charged objects are separated by a disnw(-h vpe y;c1tance d. The first charge is larger in magnitude than the ;h-1 wy(en cvpsecond charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nealfe3h7dtzkvy/-0o 8m 6gw 2 nir each other on an insulated table. Which statement best describes the electrostatic force beld2mv8k7iyzwoh3 eg/-0f 6tntween them?

  Two charged objects attract each other with a certain force. If t9 c(;i2 6j(idl 0y oqahsf4xokhe charges on both objects are doubled with no change in separation, the force betw(jskoo 9 6qc iid40(xf2hal;yeen them

  Two charges are separated by a distance er5uzfy.pf (ur 8z86)c epsuj3 zcm// d and exert mutual attractive forces of F on each other. If the cha3zrr8upsu zf5 u (fzc6j/.mp )/yec8erges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attr xen2+ xuiz ud/(0 0m1zbjxoc1act each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the 11bmzij2 xd cu0en0+ (/zxouxseparation 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-e2zg85r5muh a six. zay. oe1e of 1.0 m. What happens to the magnitude of the for8.2.h5 uar oz1sy x-me i5ezgace 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 happeb)g++gn4q trk5c q xev 3;tlk+ns to the magnitude of the force on the r+vk3 )5bl;eq n+k4gct+tq g xfirst electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Whav8bu.gw)/ib mt happens to the size of the force on the proton if t )b v8mwb/gui.he electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a sqe mst:m004coklg-*yg uare. 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 0-emyo msk4*gtcg:l0N 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 equilateral triangle. Whq; gb.p b:r+wpen 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 bgprw:+.bp ;q 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 fxtq4z4(4bfya3ha ,m4 sp;mwis not a vector?

  At twice the distance from a point charg4sv o.t)vt/r1sd1nl qe, the strength of the electric field

  Is it possible to have a zero electric field value between a negativev on a(a9+ca+;mpg(bj o7 jhs9f2qqq; gzf-g5 and positive charge along the line joining the ;qgbg f+j m+nzaj 9q7o(hgoa9 5cp s-aqvf(;2two charges?

  Is it possible to have a zero ehmytf8vu2 p7 q:7,1g2ijxj lslectric field value between two positive charges along the line joining the two chargesjf,thli7178 pj2g:q2uv y x sm?

  Electric field lines near psitive point charger t. tcvh3vo3nez. )v3s

  The electric field sh7ikge(uaax8e .+ygd 30cf6xu own

  Can electric field lines intersect in fr2khj ,ieeh(u -ee space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform so t;0*g;,h7ctz .gbtll tx+pelectric field. Give a statemel0tbsh *+.g7ot g, t;;lptxzc nt concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters e6n qcc2*q 82mygu qv+2qdbq+ are each given the same charge, the electric field (E) mi++2 dcygq2b2e c8qvunq q6qm *dway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a r465 xqknsvb. vegion where a uniform electric field is directed stra4 s6qbxv5kvn.ight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriumzux8n/.4 :hlwyj qt8e near an electric charge

  A positive point charge 9;1m5e n3ft+awpt*qqr5 wejuis enclosed in a hollow metallic sphere that is grounded. As compared to the case without 5* qw tp an153je wm9r+etf;quthe hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.s z9p8z4ly(ve7 ltc-v

State Gauss's law.

  The charge carried by omy6 y7 :z;)scee4k z7t6 cibiene 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 charge of +2.00 mC. How many x 6d e:w-qv2vpmore protons than electrons does this piece of plqvpxd-e2:v w 6astic have?

  What is the charge on 1 kg of protons: y(rahyx,*cg?

  An atomic nucleus has 0f nesyu i8 ex+ew.egv +(m6/da 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 cm, have charge values of 2.0 and -4.0 mCad)rm:smq ( v*.bza2qpfnj3a) 2w x;s , respectively. What is the magnitude of the .)(mad;qas m q2p2x:*wvn j) a sbrz3felectric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force betweebh 5v *y ibdt:.4/izm yw,,jrcn them is 1.0 N. What iwb5yj4 y:dh v ,. imciz*t,br/s the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theyl 4 o,gr+*bayih gi.7v?

  The force between a akcf.aqo-i.; eeziv q r8h m((cjv-. 1$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experidj3( l k6(zbanence a 1.0-N force. If they are moved to a new separation of 8.0 cm, what(6jk(abl 3dnz is the electric force between them?

  Three identical point charges of 2.0 mC are placed on thiuogid2ewx1r+adc0f* v7v 15 e 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 maw0vfi71 r1i cogeu2+x5a* vd dgnitude 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 mC is placekxw9 oj.f m1f5d 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 magnitude and direction of the electrostatic force which acts onkwf.1xmof j 59 the charge at the origin?

  Three point charges are located at t8 n)jjc38b nj ccru7* 2v7gcim-z6yq vhe following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.78ci8ju7 c-cnngr v2cq3 *)6zbvjmyj00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point chag, fasrc 14l kh-sm*+vjs-3es rge of -Q ke+f s-sss lgm1vh-acj, r3* 4is 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 at the lower-left corner?

  Q1 = 6.0 nC is at (0.xnc)s; qhgl 7rjj wi*e,z0(2g30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is t 7h,x2slqg*j0 rnw ce)(z;gijhe magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, vsew 3 /b+zj,l0); Q2 = -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 the 5.0 nCl /zw,sb3je+v charge?

  Three identical charges of 3.0 mC are pldxd ;iylyr1v6b8f.n3 aced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic f3xv 86d. nbfyly;i1rd orce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separap 3cb0 33 q ysqy34 3n)ns*ncjw)uicdrted 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 for3din0cbu)* 4 3crspyq q3wcyn3jns )3ce acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C h a m-x*odz-qzu:q18 tcharge is at x = 4.0 m. Where on the x-axis can a third charge be placed so ta *--u dtz zoqmhx18:qhe net force on it is zero?

  Charge +2q is placed at the origin and chackm txb75.gu ;og..tu rge -q is placed at x = 2a. Where can a third positive charge +q be plu.bmtg .cuok 5.g7tx ;aced so that the force on it is zero?

  A copper penny has a mass of 3.n cfen nwc4;t pu:(4zjl7i64o 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 against the force of gravity by the attracks.yp 5 g8 rg ptszc,t0xs/h2*tion of a fixed proton some distan25c/p yr8psgkxt s.,0ztgh*sce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres aregg+: )hj4g l ogfbjr*wir;3wyd..,a)lzj *sl hung from a common point by nonconducting threads which are 30 cm long. Both are given idijg.3jol)h;s +dl 4wy*.*g zg wrg)jb,r lfa:entical 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 loq 1u+l y7q0z-.s wuzcharge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nuclew-q .suoqul1zl+y7 0zus?

  What are the magnitude and direction ofpc*0q z/ydd;de uhg, 9s(luy3 the electric field at a distance of 1.50udhz pdd qc( 9* ;yy03lgu,s/e m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of :v qr3s+dv;o;bpxg y 1the electric field at the locatio ;g :;syqvbx v+31pdron of the test charge?

  A 5.0-C charge is 104:iwm; x*x38z ijn9ws8lz smb m from a small test charge. What is the direction of the electric f:;3ss 8i4znzwxx*bm 8 j lw9imield?

  A 5.0-C charge is 10 m from adt8cqg d ;ho:r418 o o;v6dk9*xuzock small test charge. What is the magnitude of the force experienced by 4duohc vz1 kod:8o*6 ro;;gt8c9 xdkqa 1.0 nC charge placed at the location of the test charge?

  Two point charges each hiuo e72( sm5svv*i k5pave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a p 2i vemk u(oisps5*v57oint midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC char-l(c/t tqx1v y*lc*g5 fyyf;v ge is placed at the 50 cm mark. What is the electric fieldc-;gv/t *yfyq v1fl l(5x*cyt at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -u0 c4mnqu3x/t5 )1bw xc+v dtf4.0 mC charge is placed at the 50 cm mark. tn)c/f xt5w14uxq vd+3cum b0 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 ao (cu ,x la1y6ntm:o9at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the ny (am: cato,l9 x1o6upoint midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Thzhy g2qyu40+*olm j;s e last corner is occupied by a -3.0 mC charge. Find the electric hg2ms +u*0oj 4lyqyz; field at the center of the square.

  Consider a square which is 1.0 m on a side. Ch5 upcsm;a)q,a arges 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 e) as ,cm;aqu5plectric field at the square's center?

  A force of 10 N acts majc tm2tg2tuwvs; -.4f 5md)on a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electritamd52fmt-;2 su mv4 jtc)wg.c field?

  A particle with a charge of 4.0 m2bovbbikjvt 7q6 91h4C 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.o nbmp( g2p+n9120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be pbpomgn2(+ 9 nplaced on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The bxqp+ q73l:cy sall is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direyl:ps +xqcq73ction of the electric field?

  A metal sphere of radiusij8 0i.zbll6d 10 cm carries a charge of +2.0 mC. What is the magnitude of the electrid.l0 6j8ilbizc field 5.0 cm from the sphere's surface?

  A metal sphere of ravocj+m8 t/i* v1p:i qadius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center ofvq+*:v/a p 1m ti8ocji the sphere?