State the law of conservation of electr;fy0wpg0apo 3 ic charge.

  Is it possible for two negative charges to attract e, swbyg by3(74r:6fpwi gw(zi ach other?

  Is it possible for a positive and a negative charge to attract ea,bzssr:y )y4krm ;m ic, i3s9m,xz z/bch other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod ac6 z. jzcst1 :vpay.m9gquires a positive charge an 1gzp 9cjtya..z:smv6d the silk

  A proton carries a

  The model of the atom shoa,a+ +yri.e zaws a

  A neutral atom always hasm5ajxlx250nsu6/(ser bo h k2

  An atom has more electrons than proton.*t di3zu7: jfmvuvj: s. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referrhxlx /qs-cno lk: s37ehx3(-ned to s3 --nk xe:(oqhxl3xcsn/ 7 hlas

  Materials in which the electrons are boun;vy50j tydl 9cd very loosely to the nuclei and can move aboudc9v 0jlty;y5t freely within the material are referred to as

  A negatively charged rod is brought near onez tg9z ( fj-ezf5xm7-f end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be char7-gmt ezf-9f z5(zjxfged

  Sphere A carries a net positive charge, and sphere B is neutral. Th k.6zd0zsoigj *j7y t6ey are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grotzd6*yj07js.ok g z6iunded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelyoy0,q jpt2xe h-i*9jpasc 1d9?

  An originally neutral electroscope is briefly touched with a positively .;de3oismqfwoy, -,k cb)r l z9l4lf( charged glass rod. The ely foc lf-9(bs lr,.dko qi)z3;4lwe,m ectroscope

  An originally neutral electroscope is grounded briefly while a positively chy/;v8;n hfwdm t)h a j9 9xyoj0,ldhm,arged glass rod is held near it. After the glass rod is removed, the electroscop;a y8f;hjyl 90jdhmx,w om tnvd)9,h /e

  A positive object touchek px*s4rtan;d- )q06d)dxkj ns a neutral electroscope, and the leaves separate. Then a negative object is brought nea)dq0;4kad*)nd ps 6xjk- xtr nr the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on.un nu7 zeek6) an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral met nun z.e6u7e)kallic 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 final charge on each ball?

  Charge is

  What are the units of the Coulombwpz))9wjp ll+ constant $k$, which appears in Coulomb's law?

  Two charged objects arx,28 w 4f6v cu1hwpkx-whgie+5 cf8jae separated by a distance d. The first charge is larger in magnitude thwj5,wx h8 wi-g4apcc6eh8 2 1kfx+ vfuan the second charge.

  Sphere A carries a net charge and sphere B 2bb,)efv1zdf is neutral. They are placed near each other on an insulated table. Which statement best describes the elecvfe,1f)d2 zbbtrostatic force between them?

  Two charged objects attract eac sh4-ivx. le.ph other with a certain force. If the charges on both objects are doubled wi -peh.isvx l.4th no change in separation, the force between them

  Two charges are separated by a distance d an/ym -uv+ki- vjs ib)u-d exert mutual attractive forces of F on each other. If the charges are separatebsi/v)+ ki-uvu- j -myd by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a 8+s nyq plho.r(/i6teforce F. What happens to the force between them if one charge is doubled, the othe sn i(ye8tpqh l./+r6or 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 distance of 1.0 m. What hw nf,xfm/nmq 4i5j52jd 2c i1oappens to the magnitude of the force on the proton if a second electron is placed nextm2mqdojw x n5ni2jf/c f5 14,i to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens tobp3 xb(cjc 0o:pn8z u9 the magnitude of the force on the first electron if a second elezb uxj38p(b nc:9 0ocpctron is placed next to the proton?

  An electron and a proton are separt-/i(.k nj4aq x)sdm zated by a distance of 1.0 m. What happens to the size of the force on thi-s. 4t njq/dkzm)ax(e proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second f(-3/(;t voabef izz58hzmkc point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2./vc 5;bkhe z(-z zfi8o3 af(tm0 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 equilatert0s3ypnjn 0 98 *pwbqhal triangle. When a second charge of +Q is placed at one of the triangle's vertices, an yn9 8ps ht*30n0pbqjwelectrostatic 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 vectg3l) .5,yhhrl ld rjuuu.bs+e- y*pt: or?

  At twice the distance from a point charge, the strength of the ele64 vsau: lksp8ctric field

  Is it possible to have a 1 zp,rtb m9zi.)qaxl+zero electric field value between a negative and positive charge along the liqzbr tmz)1.9 pia+l x,ne joining the two charges?

  Is it possible to have a zero electric field value between two pos1) ,cvpme,t3i3bgael psu81 vitive charges a, 3,3te u vlscip18eagbvmp1)long the line joining the two charges?

  Electric field lines near psitibz7(cj3u3fjl ve point charges

  The electric field s(x0frkh v*qg( hown

  Can electric field lines 41f -8ht zy e3baiwbi8intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed i:v kn; 5zi. +xkkdsh4qn a uniform electric field. Give a statement concerning the electric; hkxzi+q:nd s5kk.v4 field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diametp7uf pcxqn(f.fq 2 b+us x(1u;ers are each given the same charge, the electric ppcf u(.;f2 + xuqb(xusqn7f1field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a+(j.bj1 e5 tp:hhr toy uniform electric field is directe5 re( yho jtb:jp+1h.td straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilib n()esrkxm5)v pmg j1.rium near an electric charge

  A positive point charge is enclosed in a hollow metallic 4x)tn uw:std;sphere that is grounded. As compared to the case without xt:;nwt)us4d the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilh .nm/ a7)hqmribrium.

State Gauss's law.

  The charge carried by one elect+u yrf v1,;0 iezxl*c9ntztv- ron 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 +/ vmu u;7ohbi32.00 mC. How many more protons than electroi u7v/;b ohu3mns does this piece of plastic have?

  What is the charge on fqab39o- j7ta6wxa2 b1 kg of protons?

  An atomic nucleus has a-ek 403g- frszj(oa qp 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 mC,t,4kqany03opqd hmijk9* (q9 respectively. What is the magnitude of the electric force between pqy*kkdo9 ,0qjtn4q (93 ha mithem?

  A 1.0-C charge is 15 m from a second chojugzrt p-1hqhe-6hf:. c1.r arge, and the force between them is 1.0 N. What is the magnitude of the se.1hpzc h1oqth.gr- r6-uj :f econd charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apark/b:2b* o h0an y*k:4d kpi:/kmqy gget are they?

  The force between a bp 1 hrr(z(9fp$30 \; mC$ 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 theyvf wqk*o;qd* poo+cd-e/pz: 4 are moved to op: dq zfd; c*+-4e*wkov/qo pa new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. ak nbz3/(7tgx The first charge is at the origin, the second to the right at x = a7 tbn(gx/zk350 cm, and the third is 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 x*xvfn/ ; ju5hd*ts ,hjy94 vrplaced 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 at the 100 cm mark. What are the m;/rjs 4f9n5hh,dj * uv*tyv xxagnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are lo o.a ch1a)ro-hb h) ,5j*f0dg+jpowescated 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 charge 5 0hh j)hodp,+-*w1sco ao.bragjf) e?

  A point charge of +Q is placed at the center of a squqg .7vu:; tbalz0m9na, qe ir8are, and a second point charge of -Q is placed at the up,ge8l7n9:0. vm qr ;baztquiaper-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 (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 s /ietxg veat0kuy13*h+ s82t= 5.0 nC is at (0, 0). What is 8s1gtve t320i tea k*/y+xs uhthe 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 z;xp8hwisl2w) t(aug 3zz8/jis 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 nC cha3(j/ps tl2za u)8wx 8z;zwgihrge?

  Three identical charges of 3.0 mC are placed at the vertices +b.2dd jv6d1qro -pzw of an equilateral triangle which measures 30 co-b12+j6vd .pzwd q rdm 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. xi+3ub3b5)8 me b 1ag5iervyk At what point, on a line between the two charges, would it be possible to place a charge of -Q such thak8ey5 u+3)xi3g1vbbimreb 5 at 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 =c2d*a1c 17 dghnadzjk p, (lx- 4.0 m. Where on the x-axisc7*a2n x1(zga-,ddp 1jcdhlk 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 pxad62lpk qv3lsp2 )z1laced at x = 2a. Where can a third positive charge +q be placed so that the forcezkap 1d23s62q xll)p v on it is zero?

  A copper penny has a e5lv(tk2nll zl 1/w, nmass 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 against the force of gravity by the attraction of axzt:tew /5 7zq*.w xvq fixed proton some distance above it. How far above the electron 7qwxz.xt:5eq v/*tzw is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductinga) qr7;h.bxujda3q8 05dn hwi threads which are 30 cm long. Both are given i iwq7dh; aa0d5h) bxq3.u njr8dentical 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 charge of +40e. What is tb4ic0tnjam+ r6 nnc2: he magnitude of the electric field at a distance of 1.0 m from th40nn im6+c:canb r2t je nucleus?

  What are the magnitude and direction of the electricq 08 6nbawyv-23g / a,mnva,wadxp1dd field at a distance of 1.50 m from a 50.0-nC -,1 vy wan0pq,/da 6d3nd gaxb 8wmav2charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude /6 7kz c0c,vso5o5ne6n s lakaof the electric fe5/ l5nn as0czko6sv6 ,a7 kocield at the location of the test charge?

  A 5.0-C charge is 10 m from a small test cha flvz,+ls m+(fx-z1 ahrge. What is the direction of the electric fiea1 (lffvlhs-m +z,+ xzld?

  A 5.0-C charge is 10 m fri bmt 7p9.;qhoom a small test charge. What is the magnitude of the force experienced by a 1.0 nC 9qit. m;hb7opcharge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance r 7hfk 6hxm3/oai50bhof 4.0 m. What is the electric field at a point midway between the two hf 0khao6rh73 mi5/bxcharges?

  A 5.0-mC charge is placed at ii 13tn )jt1uk2 wbig-the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm markkjt 1-in)g2iwtu13 bi?

  A 5.0-mC charge is placed at the 0 cm mark of a meter mu6lb5k 72o vestick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two chav 2obem6k5l 7urges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 u+qfwpx,7xez+7;q lu*jxv(zt .tdiug , y(f , and x = 0.20 m. What is the magnitude of the electric field at the point midway betweeteupf,iq v7,7fd.xz q;zx+(jgu(,wt xyul+* n them?

  Three 3.0 mC charges are at thj5 f8 )vj4fs3:xwrox he three corners of a square of side 0.50 m. The last corner i8wj 3fvhx5 s:j xfr)o4s occupied 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 c d+w)uj e+m2o8+puvw g kd0:mplaced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at )vdk80ducwujm+p2+:go +mwe(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 ej3*b;5fz)/ tjj noajon a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude o ;53 ja/*tzbjjfno)jef this electric field?

  A particle with a charge of 4.0 mC has a mass ofi8rp2 ljrul8-g;:vd m k:zy5ns ebw3t53 rfc0 $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.1-yw x7.,/zs e,v d:nrbz+vjod20 g is placed in an electric field of 6000 N/C pointing/-,z +.yd7dz esjnx: r,vo vbw downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 sc1ls*jdv2 -sbeksx : 6e+s1mg carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitbcd- s jsekm*vs+6 2e1ssx:1 lude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the misr+b h;,/xi oagnitude of theii;+bros x,/h electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrihe ap/xoslhc.3 3.5de es a charge of 3.0 mC. What is the electric field 6.0 cm from /ep3 daxchlos5 .he.3 the center of the sphere?