State the law of conservatig;tz ;15bxo(i cdr3bton of electric charge.

  Is it possible for two negative charg w/,f )ndv viua*uwdupy40 x+:es to attract each other?

  Is it possible for a positive and a negative cha0/fttjrj2;ez)v. p0npx r;h srge to attract each other?

  A glass rod is rubbed with a piece of silk. Durinwjpxhxm1:nhu6 kdqiig.7 ,2;g the process the glass rod acquires a positive charge and id ,ju ;.wq6k21npmihgxx:h7 the silk

  A proton carries a

  The model of the atomsm1l pi* zr) axmc)s(5yo c3+m shows a

  A neutral atom always ha6orf ;hg-fq4h s

  An atom has more electrons thaask d8:sw ;l6d 5lp.qqn protons. The atom is

  Materials in which the electrons xzbqc 5xr g;,;4(vlmi, b2gz9 cb5vmr are bound very tightly to the nuclei are referred to a vrglc9z ixb z4b5 qcxg(b2v;rm 5m,;,s

  Materials in which the electi 3zj x5phba0:k w7t7z*wlsf:c q 60t/b eszx,rons are bound very loosely to the nuclei and can move about freely within the material are referred hsjttx e*:a 7lb:3sz,5wf 7zwz6bck0/0p xq ito as

  A negatively charged rod is brought near one end of an uncharged metal bar. Thel; *w(i1ovheq end;(i1vo*qhe l w of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are pz 63bf; xnf:g7bm xv-mlaced near each o-7n b ffvxxb;mz :g3m6ther on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged r8i;/r lakf +9u,zb usfod charge an electroscope positively?

  An originally neutral electroscope is briy 19y9, )(:hsrquvj 9wibuxhun1pdx (efly touched with a positively charged glas u)iw 9syvxp:(u hn,jxdqb9r 11(y9uhs rod. The electroscope

  An originally neutral electroscope is grounded briefly while a po r )n.cue(s*m+ by)hetpy*j 98yj0p fositively charged glass rod i hys.* f r(mot0npujc)+be8eyj9 *)yp s held near it. After the glass rod is removed, the electroscope

  A positive object tov bpgy:/l ma z ,ju+tv0;+5bl5zw n0,zfbvpe5uches a neutral electroscope, and the leaves separate. Then a negativbu0nbza0tv5ypvl:p +,lb ,e z+ /wgj;v55m fze object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is pla1g5 xivgf.gq9ced 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 path9i.v5q xgfgg 1 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 -z8v/( ) kdxpkksc *wrfsip)w9e77oo the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distancw (k nae l1c*oue)kbx0 e5y9p:dwc3k0e d. The first charge is larger in magnitude than the secoc (axw)k*w o0p31 nl y5c9ebk edeuk0:nd charge.

  Sphere A carries a net charge and sphere B is neutral.g u-r+d- gjxu) They are placed near each oth xdr+-ju-)u gger on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If theb u/jr*8e*l dj-yh2g b charges on both objects are doubled with no change in separyd*jr egb */h2 u-j8lbation, the force between them

  Two charges are separated by a distance d and exert mutual attractrj3 lf1s54af/ f5)r4d dcleyaive forces of F on each oth3/ dsaf) ayfd1frc5el54j l4rer. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forccb6:,a eez2cd e F. What happens to the force between them if one charge is doubled, the other 2b6zceca d e:,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 +itti/2; 2bhp ( (3rxovncicp happens to the magnitude of the force on the proton if a seco nh2i ictox; ibp/c t(2(p+r3vnd electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What hwlcy1umm *+ jlp1x.6happens to the magnitude of the force on the first electron if a second electron is placed next to the proto.lwy+phjml* c 16mu1xn?

  An electron and a proton are separated by a distance of 1.0 m. Whatqmum/*n ml o 7ro2 8f7s.dfkg/u n7x+q happens to the size of the force on the proton if the electron is uqxn2mf/7m8 /.+rfqo l dk m7 on7*ugsmoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secoap4tq;y ha;l2+br8 v pnd 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 electrostaticpv;y2+;lp8tar 4qbah 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. Whenz:3pr*dgvy i5f+5p2q,is9c ,iyrchr 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 the center charge due to a third charge of +Q placed at oni g+yp 3iys: vp*5i 95rrqf2r, cdcz,he of the other vertices?

  Which of the followil07 dtk8)n4ptry:z ring is not a vector?

  At twice the distance from a point ch)asp( l0, i71ny sofpsl+i1grarge, the strength of the electric field

  Is it possible to have a zero ele1 ;+lxvw6irbwctric field value between a negative and positive charge x6 iv rw;lbw+1along the line joining the two charges?

  Is it possible to have a hndsf/ m1s k1jr( :c-fzero electric field value between two positive charges along the line joi1h(dnfmk-1sf rc/ :sjning the two charges?

  Electric field lines neam7 :6+irl3jr(+j qmgd f lj 0liucih8*r psitive point charges

  The electric field show/*9t*mt:ylr dy 7 rfpqn

  Can electric field lines intersect in fr6 d-(yqowrvz,s4z a g:ee space?

  A solid block of metal in ebp(xco9w*d7k lectrostatic equilibrium is placed in a uniform electric field. k* w po(xcdb79 Give a statement concerning the electric field in the block's interior.

  If a solid metal sphermh n zjz 0b(/7gn0547fcxywjme and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the cenyczzjgm h5jm74nbx ( f/nw070ter and the surface is

  A cubic block of aluminum res:ijk(sw (,t3yvxe ;ap ts on a wooden table in a region where a uniform electric field is kvpxs3ija :tyw(;(,edirected straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrosta2b:t*-hz a c0 wonie./)ofm hvtic equilibrium near an electric charge

  A positive point charge is enclosed in a holld ,vv z pti7)xn*iyvg;b-cx++ow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphd -tbxxi*)vz+; ,i7ypv+gnc vere has

State three properties of connatyi8kty( 0en2 jxhxy+4i *6 xrl c+.ductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron iqd8iqb hhiio*s,g+;hw9 sam 15ks57h kqrf4 5s $e = -1.6 \times 10^{-19} \; C$. 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 than qqm)+hx 5jt )d9s7er5ih4 dpe electrons does this piece )55 hxm)p +4sjqi de9 trq7hdeof plastic have?

  What is the charge on -o 166xocsc9s5 riew c3xgou (hiv9:g 1 kg of protons?

  An atomic nucleus has a charge ofj0jct2)b 0saw $+40e$. 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 vja e ,8oso*wth+0wgx (alues of 2.0 and -4.0 mC, respectively. What is the magnitudeowtw+j(h*8 s o0ega,x of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force 9ln jv: p7tc*wbetween them is 1.0 N. What is the magnitude ofj w *l:vt97cnp the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How fars*7acxsv 4sx 7 apart are they?

  The force between a edu p i)yw:opui zx o;rxj v0;;fm915($30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm svi9:pq8g b a27kmv qz;j lz26apart, experience a 1.0-N force. If they are moved to agmvaps l6v qq 9k:8;22 zibj7z new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placedu)pk3c8+udxtq c: x- d 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 mark. What are the magnitude and direction of the electrostatic force which acts on cxdp q-3tux: u+)ck8 dthe charge at the origin?

  Three point charges are placed c g(66dz6ofn u bvacr9+6mfx4 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 magnitude and direction of the electrostatic force which acts on the charge au6fzm6c96b( x+cvofg 6r4n ad t the origin?

  Three point charges are located at the followin4 fv/ifyn*qn8 g positions: Q1 = 2.00 mC at x = 1.00 m; Q2fi/q4f8vyn *n = 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?

  A point charge of +Q is placed at the center of a square, and a second ( espgg5xb ev5z/ me;9point 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 thab ze5s/x;g emv(g5p9et 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 nbaq 86qp 4fw4zC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). 8z64qqwab4fp What 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 p3s)v.u 3c ,e/vbxcx iyboq1:= 5.0 nC is at (0, 0). What iyx1:xv/c u vqsobb)pi3. ,ec3s the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3a:k.ab g5ym0d .0 mC are placed at the vertices of an equilateral triangle which. 0: adgkmayb5 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 separated bhjd ya,z 98f )lijh.w*(yqga)y 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 a*wyjq8ga)hafd9i,( yz. h)j lcting on it would be zero?

  A +3.0-C charge is at td xcus.3tvm/f;+ )s:zl a.ctrhe origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zer /)mtcdurc; . at3z+ .fxsv:slo?

  Charge +2q is placed at the origin acm(v;hz 8y1rg :x i/2hg- itrlnd charge -q is placed at x = 2a. Where can a third piv1lrgt:-hhzr/28im x ;g (cyositive charge +q be placed so that the force on it is zero?

  A copper penny has a masmpu p3 us*v(s8er -*t+8efepms 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 a f 8c*; n1ped elzi. k-ruly(0wzixed proton some distance above it. How far above thekuyn*z8 d- l.z1(iwep;0 clre electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads w1z.p- ;xhjbf5/olt *oun sm/jhich are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces themoo zps /.5fl-m*t/ju x jbnh;1 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 magnitude of the elect s87cimw x 6jv ;5ivc*sw3uch6ric field at a distwsic3x6 ucv6; wih* 5vcjs7m8ance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a disxzxcmqj8i:(: e5 hz,fvh 3;xztance of 1.50 m from a vx8z3 c mqze h;f5:h:,zxi( xj50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. vg,il iuu1k 15 What is the magnitude of the electric field at the lou5ki i11lvu ,gcation of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is+g +/h*+bu -inpz hfzi the direction of the electz bi gh*++-ipnfh u/+zric field?

  A 5.0-C charge is 10 m ; 3ewtcp8*au efrom a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge plaetcp;8a*w u e3ced at the location of the test charge?

  Two point charges each havezhkdh : 5xy/ n25vxh1y kpe6b6 a value of 3.0 C and are separated by a distance of 4.0 m. What is h: 1nkzbk5ydh6vey 6/xhpx 52 the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mar5/ wyclqsgx lj9 1exc7*7j72yaf. eupk of a meter stick and a -4.0 mC charge is placed at the 5weeug.2fy9c 7x* ja pl5j 1cyl/7qxs70 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.ucm3a y97 sgqa4(n(bi2 f b0f:xa 1rmy0 mC charge is placed at the 50 cm mark. At what point on9iaufnx q yms a(0may1bg:4(3c7 rf b2 a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0 pdepctx1eo x6/q+2 6q.20 m. What is the magnitude of the electripptxx2qd1/+ c qo 6e6ec field at the point midway between them?

  Three 3.0 mC charges are at the threc nmku4nk /u*2e corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find u 4 kukn*mcn2/the electric field at the center of the square.

  Consider a square which is 1.0+mhl25y9dwb of,p 6m w;,ow)g *pwh br m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0)or*dg, bw wpmh;pw9o yh256fbl+wm, 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 z6t1z nac8xbqf.8r:q5 o pbk9 when it is placed in a uniform electric field. What is the magnitude of this electric field?nbc9q58.x zk68zarbfp1tq:o

  A particle with a charge of 4.0 mC srt hk yp -4h74q3.-g i6ytjathas 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 placed in an electric field of 6000 N/Cf)s3 3 k;/f ck+ vtvpw ,i1);ougjk llmp9p(yr pointp1mu +t(ic pyl;),kvvg) 9 rpj3flo3/k sk;fwing downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC.:tf0s n1h (2ecqx.)aqvc) rel 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 fief)1anlvc0cqt 2hx:)(seeq .rld?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is thea- ee2exg9dt-(t)if 87 x ojrf magnitude of the elec ogt)r- 7e8t9xe2i(e xd fjaf-tric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the vw++ek5lb d+nelectric field 6.0 cm from the center o+dew n5+lvk+b f the sphere?