State the law of conotncb- wu /xzov +-04oservation of electric charge.

  Is it possible for two negi wt0macxz l*al,cf) *1h ol/n)j,7ffative charges to attract each other?

  Is it possible for a positive and a negative charge to attract each oue );s3pmjm o*ther?

  A glass rod is rubbed with y3yxc(6u5nym a piece of silk. During the process the glass rod acquires nx(y u56y3cm ya positive charge and the silk

  A proton carries a

  The model of the atom shq.1rxmy10n*k+m sid8zov5i3(b dul ,w8 nehhows a

  A neutral atom alway9r:ra. jui)oni aju y 6rp:+q(s has

  An atom has more ele kxqi;q3z06fzn+) jbck xy.0c i:ir)v0dj:b mctrons than protons. The atom is

  Materials in which the electrobg0g41z a4aru ns are bound very tightly to the nuclei are referredb0a44uagz g1r to as

  Materials in which the electrons are bound very loosely to the 2 x4ftq3rbzer 67hu f.nuclei and can move about freely within the mat34ezt 6r f.b7h fur2qxerial are referred to as

  A negatively charged rt(dfsx 6;r9 xfu8: /rw4 nkewuod is brought near one end of an uncharged metal bar. The end of the mex (468f ;tn :wxku/rrw 9dusfetal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and s x9rx;rhfc;+f.v sfz8phere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is ground9rhr+s;f .czf8xfxv; ed. Which statement is correct?

  How can a negatively charged roiibr 5)i 1zrk+y8c(jsd charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivzaw605yat4k f+x2 klzely charged glassalx0ykkz64+ wt 5fz2 a rod. The electroscope

  An originally neutral electroscoj 9acefuo 7+7ipe is grounded briefly while a positively charged glass rod is+eoajf7 97iuc held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepas a7n,h d8n2625jz dwb5mayre rate. Then a negative object is brought near the electroscody5rbz,wnam2easj 7 2 56nhd8pe, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insula+0s;rb4j0oyxnxon s 1 ;(k 4 skh,gkdxted 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 objn ,jydo(+g;xxrbs o 41sk skh 4k0;0xnect. What is the final charge on each ball?

  Charge is

  What are the units of the Coulom. 0+dl44l+kw ym prxg7l4 nbixb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanc zb4j.whm+d9 pe d. The first charge is larger in magnitude than the second charg4dhb9m+.p zw je.

  Sphere A carries a net charge and sphere B is neutral. They are placed neg; sbd+2fllh umk hf:m1+b+q /ar each other on an insulated table. Which statement best describes the electrostatic force between thesdf+l ubgk2:mhh+ +f ;mlqb1/m?

  Two charged objects attract each other with a certain force. If thef-ptkdt,0s ly;ufo(t.fh(*4- m u zpm charges on both objects are doubled with no change in separahouk -lt.pfm* fup z4 ;ysft,tm(0d( -tion, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces oft)jw+)7 zzw0g5vy( l r,yusne F onzj7ys lwg)r+wyt n)0(z ve5,u each other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attractl7 iv2kxu5l9w ooar,7 each other with a force F. What happens to the force between them if one charge is dou2 i7x 5uwl97ro a,vlokbled, the other 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 ha-n50u/ tgy dhappens to the magnitude of the fo-ht05 dnaugy /rce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated3p d1+p7;z3ybgnm hg.dnm b6 a by a distance of 1.0 m. What happens to the magnitude of the force on 1npn 3 .b mdy3d6h7bp;ag g+zmthe first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0t5:ry,j64dyy4*oylhx n :pwqn w wm+5 m. What happens to the size of the force on the proton if the electron isy:w4od: 4mq n5,tryxyjl+pww6n*h y5 moved 0.50 m closer to the proton?

  A point charge of +Q ko*u*f. t3je2q7* l+ng4ibxbccs6 fo is placed at the center of a square. When a second point charg3*jotci sb6l x +c*o2bkfe *gn.4f7 que 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 the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at of 89 wpommbdl07:6dfthe centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertic7 lf po6bmfmodd980w:es, 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 the other vertices?

  Which of the followiv-o3x*4.-bly*zb iz o mbarm +ng is not a vector?

  At twice the distance from a point charge, the sy54m bsut,u 0vtrength of the electric field

  Is it possible to have a zero electric field value between a negative and positi* f0ix4-z /hm2prlfz g wfn)moa;8 zt1ve charge along the linzx w8;gz0 -nofzmhf/1) rf i*42lma tpe joining the two charges?

  Is it possible to have a zero electric field value between two -kr.qilft gd p5l8*l8positive charges along the line joining the8.l lkrf -8pd* g5qlit two charges?

  Electric field lines near sv2ng* hk -8tl 7t) cp71huu hkdvg6f+psitive point charges

  The electric field shown3i i.*d yktdos58 kczpk,4r 1t

  Can electric field lines intersect in fb 5ot7 q;j*k/ vflo-rsree space?

  A solid block of metal in electrostatic equilibrium is placed in a unir;43bn)i tri fv) d;ycycpd0-form electric field. Give a statement concerning the electric field in the block'i-crc); 4 pfdy0yn b3r) ;vidts interior.

  If a solid metal sphere and a hollpx,wz b vcc8b pq h*;:dte0.2eow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the w vhx.qbtec p e:;8bz *c20,dpcenter and the surface is

  A cubic block of aluminum resl :r83 .mx97uvzds g r;wv*jfsts on a wooden table in a region where a uniform electric field is directed straight u; sr.87x r:lwd mvzfuj*g3v9 spward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibr 3 8)f.ytywimrium near an electric charge

  A positive point charge is enclosed in a hollow metaljl p(n t):;wfqvamh 4+lic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point dal4 q fhjmn:t+( ;p)vwirectly above the hollow sphere has

State three properties of conductors in static equilibri ll.en4k62px mum.

State Gauss's law.

  The charge carried by one eoz tf .;nw8rupnx.j37n5o3uhlectron 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 +24rm:g2ao/t cpg*r: /atrh sm 7.00 mC. How many more protons than electrons do: /tog/*m g :ra7raht 4mcp2sres this piece of plastic have?

  What is the charge on 1 kg of protbu;x+o cmv.o0ons?

  An atomic nucleus hawq8 bs84 qhu.q e*z7mis 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 cm, have charge values of 2.0 and -4.0 mC, u,pd:x) v/a:vs0q mjir6ij3z respectively. What is the magnitude of 0x u/da mrvjs:i6q3,jviz):pthe electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0kz- wmx wi523g N. What is the magnitude of the second kmzx3i wwg -52charge?

  Two 1.0-C charges have a foor7tm 33+dwxv r7ps:u rce between them of 1.0 N. How far apart are they?

  The force between a eq1:bx0dm/x1k kbv. i$30 \; mC$ 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 twu we.s+vm4 4jhey are moved to a new separatiowv e4s.jm4w+ un 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. ,a6sia3oc.fpko; hxp2q9k3e 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 direction of the electrostatic force which acts pkfk;sea qop3a6h3co 9 ,i.x2 on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.ti,qaef ym(1 0)h*gnm)o g2ny0 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 magniot12y0m e ()myhg, n) aqfn*igtude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are loczgk l(iy hfmsmeb*0 o8m*: ++jvarhb4hre7(, ated 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 4m0j bk gbefa 7*olhr(+szrmy em*,h:ih+8v (charge?

  A point charge of +Q is placed at the7zq ue;er; t4l 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 theq; te;rz lu4e7 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 1 a):tupy1r08 -pahlp5ofualis at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net-5 utalo1aylp hu0)rp1: pf 8a 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 nC i)amt k.,bk cz7s at (0, 0). What is th7 c. ztkk,)abme direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0g*yn h/td06s if utz46 mC are placed at the vertices of an equilateral tr 6ug6ttf nzd4h*0 /isyiangle which measures 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, which are sepi87r9zf- cx0- r ch 5jpihm-m-ax6tddarated by 3.0 m. At what point, on a line between the two charge c jh- pdmr7zmrxha9t0d -xici-8 -56fs, would it be possible 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 = 4.0 m. Where on fp 8 sg1a7dfi-the x-axis can a third charge be -p178fgfiad splaced so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x 1xp2f qhdqxy34al-yht .; ) qn= 2a. Where can a third positive charge +q be placed so that the x;)p-f3x241 q.ntyy ldaqhh q force on it is zero?

  A copper penny has a mass of 3.0 g.q *w /,ws3mmnw 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-- 7kekfgn2eonhs;4b8)f nb u of gravity by the attraction of a fixed proton some distance above it. How far above the electron is theneh 4)-f- nk2;snf bekbug78 o proton?

  Two 0.20-g metal spheres are hung from a common point by noveq:e ov1 i5 aj1 ,effw/3oen-nconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart une:wjee5 o n1i ,qv/avf1 3o-fetil 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 magnitude of r38m osbxv, -bt)e 3jtthe electric field at a distance of 1.0 m from-r 8ojbvbx tt3)s,e 3m the nucleus?

  What are the magnitude and direction of the electric fielv+plz1du/f*uvy8 7 .)h ezvwbd at a distance of 1.50zud u*hv8z)+ wflp1 7evyv.b / m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a smalg **vq qz.4akw n/(cfsl test charge. What is the magnitude of the electric field at the location of tscwnfkq(q .** /zgva4 he test charge?

  A 5.0-C charge is 10 m frompn )douc /-hsna:3,iv a small test charge. What is the direction of the electric fic p,v uds-oi 3h)nna:/eld?

  A 5.0-C charge is 10 m from a smal ;hn8u1zfj79j1 ywdjy l test charge. What is the magnitude of the force experienced by a 1.0 nC chargenj1z8uh9j y dwjf7y;1 placed at the location of the test charge?

  Two point charges each have a va :2zuq cq,b2h/nny 0fdlue of 3.0 C and are separated by a distance of 4.0 m. What is,22:d/ bqu nqcf nyzh0 the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickz-uk2 3/x nh;-ox j etl6.l-(meni fjx and a -4.0 mC charge is placed at the 53le tz/ .j2f-xxiko( ;lxj6m un-eh n-0 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mam/k(:r;7d u*bjn ymxj rk 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*:d;xrmmk/ j (7nju yb the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 anqf+r0i w/df*j577m xj e5fn q(nnydd5 d x = 0.20 m. What is +qr deff*nf( nwq5/j 57y07 dxd5jmn ithe magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50-3a/cbu3n 8cy( bfvsd m. The last corner is occupied by a -3.0 mc3ay v (n3-bcf ubs/8dC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a sibn2rwia4 se .;de. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1);.;s2 nir weab4 +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 lrg(i rj rz-z+8hsf/i lpb9;1holi*(iu2s) dof 5.0 mC when it is placed in a uniform electric fiel (ldi1*( h/j)u;sih l2rrbio psi8 l9g +z-rfzd. What is the magnitude of this electric field?

  A particle with a charge of 7p qpck8 h5iogou6qccc25 i5v9+v 7g y4.0 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 x mv2dvssy -.dh4p1z 4mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to bmhv1d. s-2pvx 4 sy4dze suspended?

  A foam ball of mass 0zba:: k7i1, wf a*xe)u6w znwo kv39fw.150 g 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 magnitude and direction of the electric fieldzfw o :v)bau a31:*wie knxwfw z6,97k?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the- b6hpxtv*1ye magnitude of the electric field 5.0 cm from t*xvhey1p-b6 t he sphere's surface?

  A metal sphere of radius 2.0 cm ndi;hu 10n oi kxn:k30carries a charge of 3.0 mC. What is the electric field 6.i uo hn3x;dnn10 i0kk:0 cm from the center of the sphere?