State the law of conservate;s / x n/svk:8e vnlwl*k;ck:nsm6i, ion of electric charge.

  Is it possible for two negative charges to attract each j-k+hxi6x *sfother?

  Is it possible for a positive and a negative charge to attract each othn pbelxb-x:4ks 01 pk-8.wgirer?

  A glass rod is rubbed with a piece of silk. During the process thelu ,ux;dg*c enw6z 89y glass rod acquires a poyld8, xezu 6ng uc9w;*sitive charge and the silk

  A proton carries a

  The model of the atom shows a a,nnn x ,lp4rc9arx.o3a )p-;0 mwjbt

  A neutral atom alwayqqr zb. / h1+2/covswls;dk l1s has

  An atom has more electrons than protons. The a;z8flt xg7pv7 e+4tbotom is

  Materials in which the electrons are bound very tightlyi4 f up/8 cs2q3rfrvk42sj;si to the nuclei are referre cf82vqsfr 4 psk/jri3 4uis;2d to as

  Materials in which the electrons are bound very loosely 5wr+zq6 kuh +eoc1.lw to the nuclei and can move about freely wit.kcoeww 6z1luq5r +h +hin the material are referred to as

  A negatively charged rod is brought near one end of an uncharglmzf;ljg o4bhkh pqqh1 3ppp.2 )04g 7ed metal bar. The end of the metal bar farthest from the charged rod will bgh2 plkbl hpho 44.gfpm;qqj03z 1)p 7e charged

  Sphere A carries a net positive charge, anld9( rrkw4 z/b;y1fgtd sphere B is neutral. They are placed near each other on an insula b/;twgz 1(kd fy94lrrted table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged ro0ychs9e:nxtf. 7 yv5cd charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positif 0w: )e /7ia5yxmzb:*dehv/s y l-ouyvely charged glass ridzy:0a:/ey7 5esow bvhlu-f/) xym * od. The electroscope

  An originally neutral yflmn:: u3 fcrl0. e,selectroscope is grounded briefly while a positively charged glass rod is heldn.m lyf:c: lre, s3u0f near it. After the glass rod is removed, the electroscope

  A positive object touchesh50)efjwxw wp/f1: am a neutral electroscope, and the leaves separate. Then a negative object is brought near the eljw1 :5p h) wa0ffwe/xmectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged obbm v;u7i4s3gg ject is 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. Whaug47vgi 3;bsm t is the final charge on each ball?

  Charge is

  What are the units of the Coulomb cons dn(b*r:vzau,um u/ssc3 qt4dh 3z2( w4wp)hitant $k$, which appears in Coulomb's law?

  Two charged objects are sepa9bbq-sk*e *- mg:jld crated by a distance d. The first charge is larger in magnitude tdmg-j k:*besqc lb- 9*han the second charge.

  Sphere A carries a net chapr0x3zmi-8y z rge and sphere B is neutral. They are placed near each other o0 3z -izypmxr8n an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a9 9pmicsj5 f7jviha7m)g3q6a certain force. If the charges on both of97 c mq6p)mva7i9ij 5s a3hjgbjects are doubled with no change in separation, the force between them

  Two charges are separate3 fbh/2ywxhkox:t(c)f8cx f5 d by a distance d and exert mutual attractive forces of F on each other. If the charges are separakcw3xx28o :ff (ftyx/cb )h5hted 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 the fo:ebiry qt ej l72h)z -oln7n: 0zf5ws-rce between them if wb 5nejr7ll: z- fye soth02z-)qin:7one charge is doubled, 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 (jtcgz 6l h9d7m. What happens to the magnitude of the force on the proton if a second electron is pt7z( gjd6h lc9laced next to the first electron?

  An electron and a proton are sepat33 e6exq2y1kp w- h 7m8rkfnrrated by a distance of 1.0 m. What happens to the magn8f3-xemtyq1e2w6k7 r h3nrk p itude 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 m. What happebk 4+zezyrj f 96bf+x3ns to the size of the force on the protybef3z b kzx+j9+6r4f on if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is pl2ioi*8q tcsz5l ;zdc- ;wu ho7aced at the center 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 2.0 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 q iz ;iu-whl5 c;o27d8cst*o zon the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an e; t*s w4t kgc;-khk -nn. ,jcyjycn5-fquilateral triangle. When a second charge of +Q is placed at one of the trianglnjnjs ;.c5t c th* -yk4wcn-- k;yfgk,e'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 the other vertices?

  Which of the followimfado wq/) fnmpza(:2ikv7) 8ng is not a vector?

  At twice the distance from a po;0lz spk entm797 h(b:ohc 8yqint charge, the strength of the electric field

  Is it possible to have a zero electric field value between a dm u7/; x ,eruh,a2mfvnegative and positive charge along the line joining the two ch2fx deh/mra7;,um uv, arges?

  Is it possible to have a zero elect-ckj,bz1zb mr mm( ovgaa 5e.*h7:pj)ric field value between two positive charges along the line ( jak ,b*vm)oea7.bzpgc1z mjm -:r5hjoining the two charges?

  Electric field lines near psitiv,zi 82nz,9vfn0sop9t.sza q ne point charges

  The electric field showg:j74*yhsxcd eu u2q (n

  Can electric field lines intersect in free a m::mwrh 5ov:space?

  A solid block of metal in electrostatic equilibrium 9apap;cgu j +oc2z48d is placed in a uniform electric field. Give a statement concerning the electric fieldoz;j94+c8pp agd a2cu in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each 9k k6w rs4-uslvtc8 v;given the sa;-kvs4c v9tu8rlw 6s kme charge, the electric field (E) midway between the center and the surface is

  A cubic block of alumik mbny;g8c,hk4yb : o3num rests on a wooden table in a region where a uniform electrio;4gh8:y k3b c mkbyn,c field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an ksvb+ 6l56mw nelectric charge

  A positive point charge is enb-4v ynlr 6rj; 3gi3dxclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow -rrvxi;b46 djyg33ln sphere has

State three properties)ze 2in 9/z+9 octcjwm of conductors in static equilibrium.

State Gauss's law.

  The charge carried by 5voy l*qn6a,a4qsi5v one 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 protons asv y.yj 2-ie+ o4rl0lthan electrons does this pie+elajr4oy-si 20v yl.ce of plastic have?

  What is the charge on 1ibu4.tohfm 9. kg of protons?

  An atomic nucleus has a charge of f,zi.jq m6 67g 84y7i,ur ruknqq;kom$+40e$. 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 andofn6+nkayr-ru*r h45 -4.0 mC, respectively. What+noak r-*nru 5ry4 hf6 is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a sp : m2:rpvqi dx2 zhtzz4r9 0j )b:m4f:s0zzndecond charge, and the force between them is 1.0 N. What is the magnitude of the :zxmrdztzi d4n2p:2rz: h:jv94) qmspzf0b 0 second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theynucj7 o z,r5j3a*q z;u?

  The force between a d w4:yh gl*l-vp/ maxt)2*oel$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, inio,1.jffx*iehkfd+ b)q b3s)itially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is theq)h 1 o+bk )fib,fj*3xies. fd electric force between them?

  Three identical point charge-2o0fa/ kyi wrs of 2.0 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 mai0fya o2 wkr/-rk. 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 charge owa,b24 jip *obpo7)ynb- s*nsf +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, as7s i a*-)yw *op42jbp,bnnbond +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 are located at the followivnr*cvv p; 8c5ng positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5c c;*vvvn85rp .00 mC 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 the center of a square, and a second point che:hyyk5 d2:+/ d0 ,sa tsqsrxsarge of -Q is placed at the upper-ss+e::d 5dsay 2,ysh trk/qx0left 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 = 5.0vmv.r3s+v 2wr nC is at (0, 0). What is the magnitude of the net force rwsmv 2. 3+vvron the 5.0 nC charge?

  Q1 = 6.0 nC is at (0jq (lfy jd 5f3av6r2f9.30 m, 0); 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 5.0fl9vyj(f3r fqj5 26ad nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilaterp:)8 08o ivjzvm76ff;i bxdpx0pgc+zal triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any oi vmcf0)8bipg0x vp 6fzdop;zx:78+jne of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what po,/q is:x -/- hiwjzjfbint, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting -,//-i qhijz bs wxj:fon it would be zero?

  A +3.0-C charge is at the origin and a +9.0bby. p96;0 rew 8etbxtl,hsm,-C charge is at x = 4.0 m. Where on t b;r8b, 0.bepmw,9sxt6lheythe x-axis 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 = 2a. yi6i* yet-- ch Where can a third positive charge +q be placed so that the force on it is tihe-6ci *yy-zero?

  A copper penny has a zkhj;j-pb vzo u5 2-8zkf0dk(mass 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 gravit ax++ pqynx/g6y by the attraction of a fixed proton some distance above it. How far above the eagxpx+/ nq+y6lectron is the proton?

  Two 0.20-g metal spheres are hung from a c3bz)/g bwi a )u24pgd;e moj*zommon point by nonconducting threads which are 30 cm long. Both are given identical charges3;pz g/4 *wa)z)udeigmobj2b , 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 p,cer:f)wul.wm 2qi0 charge of +40e. What is the magnitude of the electric fimqwu fep:w c,r ).2il0eld at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric fieldfe0xfw)/f*gw at a distance of 1.50 m from a 50.0-x/0)e*ffgf ww nC charge?

  A 5.0-C charge is 10 m from a small test charums3xrvo 36f-g9 .wxpge. What is the magnitude of the electric field at the loca6fv x3 9gx3 pwo-rums.tion of the test charge?

  A 5.0-C charge is 10 m from a s 7 k6x0jl:l8(/lu x-vumo wuyemall test charge. What is the direction of the electric lj0 u(kmul -x ul6xvy7e8o:w /field?

  A 5.0-C charge is 10 m from a small test charge. What is t6coua 0 k*gl1 51w-0ff cm-hlv*lbthahe magnitude of the force experienced by a 1.0 nC charge placed at the location olw o lvh1f*l*0utk1g-chbf -60cama5f the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance ockk23)73 a zaxxok h4mccljv;hn- :(mf 4.0 m. What is the electric field at a point midway between the tw2xcokz43am mj)nk h :v-a7 c;hxlkc(3o charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a,by 4fal u:dx3 -4.0 mC charge is pau4 f dbx,:ly3laced at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm ma0en8, cc j(fvzrk 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 electric fiel0n c8zefcv,j (d zero?

  Two point charges of +3.0 mC a rob:cdp;4(1r-y lilend -7.0 mC are placed at x = 0 and x = 0.20 m. What lpeod r:rbilc(;1y 4 -is the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of *b8lj9fb b2q+ormfo3a square of side 0.50 m. The last corner is occup l3mo+bj* bb8f9qr2 ofied 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 pl li1vkh9r 0/mwy6v oizew;x:5aced 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 electric field at the square's cente kl6vwwxy5riv: io m1;0zhe9/r?

  A force of 10 N acts on a charge of 5.0 /(zmi)dxn7lt;/f-nwf- ha 9zfy uba3.op: hcmC when it is placed in a uniform electric field. What is the magniti)7lzmxfy .(cpwza-hnn93:;ou// hb - a dftfude of this electric field?

  A particle with a charge ofqk cd:ap j7f, ckth *6bs*5m6y 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 0.120kc+l p6x uth )l 26h7ff+chz:q g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed o6cfc6x+ klz+l7u:hf2)hqth pn the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placeddkvg d:r*r3n *;/it ej inside a uniform electric field, and is suspended against the force of gravit/ n*g;:vr kri3 tejdd*y. What are the magnitude and direction of the electric field?

  A metal sphere of radiuv;mr9zzvx1)6t 3p ny zs 10 cm carries a charge of +2.0 mC. What is the magnitude of the )6ntz1v ;xy p9 mvzr3zelectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries acwlx6a +n/ rn+ charge of 3.0 mC. What is the electrirw ++nnc6x /alc field 6.0 cm from the center of the sphere?