State the law of consv) duj* obp17rcqz*2mx2bd- xervation of electric charge.

  Is it possible for two negative charges to atx5zqgpb4 :vee2z 7u/ttract each other?

  Is it possible for a positiaq2lev d dlr+t;6c8i: ve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the pcm/iw;0ggvgb1 ey*j) rocess the glass rod acquires a g 1yw;e/ g0j)*vbmig cpositive charge and the silk

  A proton carries a

  The model of the atom shows1 - 2pfu7jpe4j fcdll-unug+5 a

  A neutral atom always ha8g8u3x1 ui2xf w )-osaty4caes

  An atom has more elecq-54r o iguz.ktrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nucl ( av)2+a1kyt6q3 esr 9jfc(0vvhhnwpei are referred to ay hv6ar+ 9w ck3j((1 qtvhep f0snva)2s

  Materials in which the electrons are bound very loosely to the nuclei and 5 rv(2itnd/v ,ip yz4pcan move about freely within the material are referred tory,d2ivp(/4 v ntz ip5 as

  A negatively charged rod is brought near one end of an uncharged )f0wyp pve/y,.c twb*/5q+; ybub llhmetal bar. The end of the metal bar farthest from the charged rod will p5elw)wb*p;qy.bc /lu, v +bth0f/yybe charged

  Sphere A carries a net positive charge, and sphere B isk homc sq;*ov82hwoq2 bz--vg9ov0 :5ssa4 bq neutral. They are placed near each other on an insulated table. Sphere B is briefly toucheqs4mh;--8bh2q os5qavoz9scg0:v vo* k2o bw d with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelyf0 mvet:x28mb/fb 5i 9dt4yce?

  An originally neutral electroscope is briefly touv-t t*jmd,z4mched with a positively charged glasj* -zmm,4 tvtds rod. The electroscope

  An originally neutral electroscopeu5w8br;ci9 r a is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, thr8ucw5 i bar;9e electroscope

  A positive object touches a neutral electroscope, and the leaves separate. ( 82lq0r2+ulm dcmpsy Then a negative object is broud2+( sl ym0l q2rumcp8ght 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 neutralitav,a wd:w-- 2.lknkwi+ w,j 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 -, .t iawk aldkvn-2wi+jw: w,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 consxc2m2-7 u9vuwjf w-vg- ole1jtant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The. nif2ty+3(n q9q xyci first charge is larger in magnitude than the second chafq(t3 xy.y in9n+iqc 2rge.

  Sphere A carries a net charge and sphere B is neutral 8cq-ng0ajhqc /hn2:q,g yid,. They are placed near each other on an insulated table. Which statement best describes,ggq n/hc-dhcq 2j,i8an:0y q the electrostatic force between them?

  Two charged objects attract each other with a certain f5sw whhhw0qz; n0ae87g 1atk4hr3m h,orce. If the charges on both objects are doubled with0ww4; mhahh gsa05q rz73hktn,w8 1eh no change in separation, the force between them

  Two charges are separated bypr7a+ 85cxj o9(hgcgr a distance d and exert mutual attractive forces of F on each other. If the charge7hrca8 gpxc gj r(o5+9s are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forc/ xqi5ek-i2 ,y 87akjus zw1lse F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation dys 25i1a 7e/juwksxli-z, kq8 istance 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 f;wci uv*/h 4knkh6rjq-/rf ;a distance of 1.0 m. What happens to the magnitude4wcr*rvfjn-fhk i6;k//uh q ; of the force 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 happens to;kp5ir 3etcf/ the magnitude of the force on the first it/r3f; kc5pe 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. What happens tc.hr:a8qo3e stn9 *qwo the size of the force on the proton if the electron is movedq h.q wntrcs8oe* a93: 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secondfkvux n3.y8h8wc,hcd) 7 w(tvu-mant , gj-6d point charge of -Q is placed at one of the square's corners, it is observed that an electrostatichtcd .k83 w x ),yv6gmcnuh(f nw--,j8tvuda 7 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 the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is p ) ara2ivz8u+olaced at the centroid 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 uar8a)oi 2vz+the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is np kwt)+.zoc qm1z -yrkr/1*ec/v)zfsx6x;dyot a vector?

  At twice the distance from a point charge, the strength of the electric fiqlf8q 0 1bo0e8byn/pf eld

  Is it possible to have a zero electric fahbd9z;s- 5ff4:s miyield value between a negative and positive charge along the lineihzm fb5sf4 -a9;yds : joining the two charges?

  Is it possible to have a zero electric fe:hgf:5god v6-b y e2lield value between two positive charges along the line joining the two :g d-6lgbyvhee2of :5charges?

  Electric field lines near bkd),2zd2l n bm9wk(e k. 7pxppsitive point charges

  The electric field sho+ aqfqryimcamd+; qt/3: 9u1a wn

  Can electric field lines *lekx g64m m4yv4dt g*intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a un-vo5eysce ) b,feh9l:i,tf- piform electric field. Give a statement concerning the electric f ,ysoh t,epff5 ecilev9-)-:bield in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters .tf pw2:,x;azb i:slu are each given the s2.i ,tw: :pzbs ualxf;ame charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table innd5hkple.-zgim -b p0 h, +(de a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the bnh(ezh-e ml.5i-pp0dg,k d+b lock's top surface?

  If a conductor is in electros8 r.c,xixsegp ysa5o77 (l. oxx6:vy xtatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere th+jti2,z5pv6 o r j4ahmat is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above4 2 mav,6rh jotipjz5+ the hollow sphere has

State three properties of conductors :9tyy /n1 z0b-wrnjt cin static equilibrium.

State Gauss's law.

  The charge carried by oa ;:t -2;k9 nm ujia4xyljy)aqne 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 more proto:yw9;yi pbw l/ns than electrons do9w lpi ;:/wbyyes this piece of plastic have?

  What is the charge on 1 kg of prsqallf kp u:x5;7ze::/ c9yya-d mg .iotons?

  An atomic nucleus has a q/-t:bd:)ndmen zjf + 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 va5 lp:kls 2tn+dlues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between2 ldl5 :stn+kp them?

  A 1.0-C charge is 15 m from a second charge, -ik;/*bg,ms ;feyh g .3jevvz0v2qpgand the force between them is 1.0 N. What is the magnitude of the second 0b/vvp *k - ,yggehe;.js;q3f zvim2g charge?

  Two 1.0-C charges have a for)1 -fbrgqq.c 5o lcnf53stb;z ce between them of 1.0 N. How far apart are they?

  The force between a ld:few5 wpq tct073 /l 49hmhc$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initialb l/ bovs;+ p3)ll1qpjly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the obpvj1lp)3lq /;b+l selectric force between them?

  Three identical point charges of 2.0 mC are placed on txhtg8cg67g 4tvy7zh6p p7x y/he x-axis. The first charge is at the origin, the second to the 6pvt phc7g8 g 7xthz7/6yx4ygright 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 charge at the origin?

  Three point charges are placed on the x-axis. A charg cyaiucu4(l-6dc -yk8f4. e9oj+rhm xe of +2.0 mC is placed at the origin, -2.0 m C to the right lm+y8euixy4co6(c-r dhac f uk.-49jat x = 50 cm, and +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 aroh.p/(m9nriuw xbd *;n t 9aa3e 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 /wn torb99p3 xan.dhi* a;m(ux = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center ofd43x,d9oi aww 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 at the lower-leiow ,349wdda xft corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0,q1ac62t* xuuv8 wixlmr b ogg/19 hp7+ 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatba9/t1o2u1xi* l rqxg7h+vmpg 8cuw 6 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 at (0, 0.10 m); Q3 = 5.0 nClttd99et2ov 7 is at (0, 0). What is the direction of the net force on the 5.0 nC t7l9t 9d o2evtcharge?

  Three identical charges of 3.0 wer4t d2jx(; anul6ub;*5r iamC are placed at the vertices of an equilateral triangle which meer;wn;uib2* ra 56x4lu(dajt asures 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, whicj8f lmvr5uh sj(c ;7r+7 h-ywph 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 woul7 rym 5chsf8v-j w ;7h(urpjl+d be zero?

  A +3.0-C charge is at the ymm6k jgc ei;18 yn/(dorigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placy;gicj8 e m1/(ndk6ym ed so the net force on it is zero?

  Charge +2q is placed at the1 icf kug7vt )l*lh+x- origin and charge -q is placed at x = 2a. Where can a thtg7* +l) hxvi-cl1ukf ird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3. :iqrv kfwswot 59-b(;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 attractionzt i(sh::9a./jwum xv of a fixed proton some distance above it. Ho 9ihut (m as::/vx.wjzw far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads w-d /*ddad uzdkd1) abl fh4w7(*um3fwhich are 30 cm long. Both are 4 /df(lduawk)7bamd 3 1hddwu*-*dzf 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 has a charge of +40e. What is the magniq ;j+mof;u1fmbx: unw4n; 8kitude of the electric fq 8iu4jkfu+x nf1:w;m; m onb;ield at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a diu5nd:afmg 9s *stance of 1.50 m frodf gmna*9 u:5sm a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is th:ci t x1k 8j )c4zlbc6/f6anxte magnitude of the electric field at the locatijltck:c18/bf iza64tn6c x ) xon of the test charge?

  A 5.0-C charge is 10 m frohwyithcq+4ejaj3y5:qyk2 t 22a 0 p/dm a small test charge. What is the direction of the electric fp0caaj/qh yijt e 252yq+h twykd:342ield?

  A 5.0-C charge is 10 m from apvt*.cqh9ovk:9w i2c small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of th *pk o9hc.:2tw v9vqcie test charge?

  Two point charges each have a value of 3.0 6rdvr;e : ju8q4wj60r4iwi3; eu fli yC and are separated by a distance of 4.0 m. What is the electric field at a point midway between thevyuwjq w j603;lrd4ri e8e4;ufrii :6 two charges?

  A 5.0-mC charge is placed at the 0 cm s)4vau)h;jrtp2 (,di;j cl xezee; ,amark of a meter stick and a -4.0 mC charge is placed at the 50 jx)r 2ihz)at, ; e,e;jcduae;pv(l4scm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at tw 8 k,ddsr3 7qsl:tsa-he 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the elelrs-q w d3s87 ad:skt,ctric field zero?

  Two point charges of +3.0 mC and 1eer0t7jz7 na-7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the nea17j ez0tr7point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side vk xxkuu o 14, 8zk6)+:bqehse0.50 m. The last corne6s ehb 8, qvz+ouxkx1 ukk):4er is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 3iq4/ a fojhss9 - 74z;jzewd2aywcs kgh)8z2 1.0 m on a side. Charges are placed at the corners of the square as foll22 kzawsfoic3j4sz-7h8 w g)z4h a q/9d;esjyows: +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 wre kvh6;ekxh+0cc z ;;y2s9pg8fwgj *hen it is placed in a uniform electric field. What is the magnitude of this electpkj hw2;gh;sf8 06cev grc9+x;zk y *eric field?

  A particle with a charge of 4.0x0:o6 u9py i1 rppz-dv 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 plahxsn 4:owi6 4 yzq6hawy7vh 3/ced in an electric field of 6000 N/C pointing downward. Wh:x in3soh/yz46 4awv7hwq 6yhat charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0,s6deh hg;:p-c6sc bf.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the forc;cf6 bsh6- dh p,seg:ce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radijxcyahp7 jj1d ym ;+ltqijl )f6 :801eus 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sph)qljyjie ydj07 xl;ma:+18t p6jh 1fc ere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What icr0yvo/v29fev fks 4 yo5;(ym0 hqr8 gt9 1iwns the electric field 6.0 cm from the center n(9yo/vy y h0wf m o01sir54gfv92etkc8qr v; of the sphere?