State the law of conservation of electric chc/g *4rhvx6wx hu69zsu;q.zzarge.

  Is it possible for two negatiz.vg; 7po dyj3ve charges to attract each other?

  Is it possible for a positive and a negative charge tlo5uzmrpjt0a +:q+ i*o attract each other?

  A glass rod is rubbed with a piezz,:z(h ia- 87eshywa; kno4oce of silk. During the process the glass rod acquires a positive charge a h8sek4ohi7oa;,waz-y: znz(nd the silk

  A proton carries a

  The model of the atom shows ok+ jz:/d m:qua

  A neutral atom always has b3qnc+k t:g6rkqf4f ,

  An atom has more electrons tha:l ba(kmjq 8jd*0;xnqs4 ra 2un protons. The atom is

  Materials in which the electrons are bound ver lpldbq2-;o ek(w06k)o sb:uxy tightly to the nuclei are referred to as;)0wsbpu b6xk 2l:( qokle od-

  Materials in which the electrons are bound very loosely to the nuclei an78k/vzv7hxnjjm-z ;h d can move about freely within thz ;h kvx7vj- hj/78mzne material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal h.*cw8x yg:6j 0ffwwabar. The end of the metal bar fart wg*y.:6ajch ww8xf0f hest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B i ocgnx 2br0*k5s neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correcob 0n5grkx 2*ct?

  How can a negatively charged rod charge an electroscope pos:(pza .*lk1 b uzhu.hr+ njlx+itively?

  An originally neutral electroscope is b1 pqwig j g:ssk )-w),zzp+zm+riefly touched with a positively charged glaqs s:w )+-z)zj+1zpwpkg gi,m ss rod. The electroscope

  An originally neutral electroscope is grounded briefly whilels/ c 68thv+eu a positively charged glass rod is held near it. After the gvc +t/6l8sheu lass rod is removed, the electroscope

  A positive object touchesjg (yam(/3emv g 6uo9y a neutral electroscope, and the leaves separate. Then a negative object is brought near the e(ymvymgg3uo (9a/6j electroscope, but does not touch it. What happens to the leaves?

  A large negatively cx izr4,d,su0yiz4mv: rf w m90harged object 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. s0,4,v4zyfz0 r9xmirui mw d: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 consw cm) v)rj roz*rclh.z- +*1wc7rue.dtant $k$, which appears in Coulomb's law?

  Two charged objects arc3x00f6sw t4b pms8 bye separated by a distance d. The first charge is larger in magnitude than the sb c3b8xs400ysfmt6pw econd charge.

  Sphere A carries a net charge and sphere B is nkyb yu/rj/v)1/ vxqwa(91p peeutral. They are placed near each other on an insulated table. Which statement bes1/1wx vvj /u9re/bkpy yq p)a(t describes the electrostatic force between them?

  Two charged objects attract each otho,bvrep-/rh.8dzhb 9 er with a certain force. If the charges on bodh/ 9ob8 z-b,pe hv.rrth objects are doubled with no change in separation, the force between them

  Two charges are separated by a ay hv x, d x9w f*ova9,en,s5.qe*1 jp4dihp4bdistance d and exert mutual attractive forces of F on each other. If the charges are separatvb x ,xop.v5p asah9**d44,f 1e,ihwqd9 nyejed by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. W cp6o*5q7zut jj 1o*wmhat happens to the force betweenocq7 zjop5um1 6w*t* j them if one 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 e t85qc06 -ns5nuvr1ckr/uc qof 1.0 m. What happens to the magnitude of therc-1u5 r8/cecn v5nuk0tqq6s 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 8j:qaxygvw ng iic ,/n046*e p1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placedpgaiex40 8y:v *ncjngq, 6w/i next to the proton?

  An electron and a proton are jk8ry 5y1 bi0jzs9rg(separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0. j jrkg0 zy(b8i91rys550 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second lx)h8nn se) f;point charge of -Q is h xlen;f)n8s)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 the centroid of an equilateral t.3r* xj7tiyhq7fx; jariangle. 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 the center charge due to a third charge of +Q placed at one of txh7rj;tij 7 3y fxq*a.he other vertices?

  Which of the following is not a msrj -wv9 :d1 ;/d2czjne cy7dqno56gvector?

  At twice the distance from a point ch u7c9c dgi/9aw+8swq w0)cj szarge, the strength of the electric field

  Is it possible to have a zero electric fieldxqi, gfz 2hz(m33 o-ifst mcm9(4b hq8 value between a negative and positive charge along the line joining the t4m c qbgf zm3miq( hf8t(23xi9,zo-hs wo charges?

  Is it possible to have a zero electric field value between two posdi hxdfy :g68i:4q t+7 iu)wxqitive charges along the line y gi d t76wqihf+i4)::xu xdq8joining the two charges?

  Electric field lines near pssnh+ elt;i3,b4fg fu9itive point charges

  The electric field show /4njbpju(f3jjg.wt m d (jw46n

  Can electric field lines iu m0sxx5 p21nol ns(qge 8;j5untersect in free space?

  A solid block of metal in elm+kp 1yar4h n-ectrostatic equilibrium is placed in a uniform electric field. Give a stap1 arnhk+y-4 mtement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow mdqcn(pao6,v29h h uqu-j2 om- etal sphere of equal diameters are each given the same 9jphoq vn ,-qc2u6-a(uo2 dhm charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in auvwoee+oc:g 5 46/mvu jq.9 mb region where a uniform electric field is directed straight upward. What can be said conce6 u bv9vwq5og4mco em/j:+. eurning the charge on the block's top surface?

  If a conductor is in electrosta m35 )q2vsisyb+yd fe2tic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groutpyacd0o )/j.)eg *- kueeq/ onded. As compared to the case without the hollow sphere, the elect0t.-gpuec)/dye) *qoe j o/karic field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriu5+r8trovo /eu,4lzzu m.

State Gauss's law.

  The charge carried by one elcf lm9mhk;6 8g((x0usltdm p-ectron 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 hay1lcy b.41z1j7dw) pxx2l9s ep5: zfaj.ect es a net charge of +2.00 mC. How many more protons than electrons does this piece of pl:1sb5.pl x 9je .fwc1zecpj21y d)zx7yt4ae lastic have?

  What is the charge on 1 kg of protons?l3 j gi/jkm4(:;c(g p. dyzc4z i9zhfj

  An atomic nucleus has a chargeen6gng/m*6.my o9g6-tgd3j 4ox kzgrfsu3t 7 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/ca;o.-zw bmw*ntzg ifbe8/tzw ;n 4 0 and -4.0 mC, respectively. What is the magnitude of the electric fo8gz* nf c.n4;/t wowz- e;0b/ atwbzimrce between them?

  A 1.0-C charge is 15 m from a second charge:p www 7lvo+wv/6wc0q;v1f xa, and the force between them is 1.0 N. What is the magnitude of the secondf7wc0q;6:p1o+ w ww avxl/vvw charge?

  Two 1.0-C charges have a force fyi1/j )g7.yqxq:ap z between them of 1.0 N. How far apart are they?

  The force between a zo7qt7:7 vumw$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience 4z tr) pk0tb9ya 1.0-N force. If they are moved toptb ky40rt9) z a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pc2t a wy(;kh2(f/lcuplaced on the x-axis. The first charge is at the origin, the se fh wuykt c;p(a/22c(lcond 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 the charge at the origin?

  Three point charges are placed on the x-axi -*jz /f7;hr+)jts q/ef3jtap *os tjss. 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 theo3jfa / h+s/;jtjt-*)rfe7q zptj* ss charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC xa*;r0 l7, ujotrg9hrxa7ys9 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 s aljx97;yur*0r g7 oxr9h,atof the force on the 3.00-mC charge?

  A point charge of +Q is k vt4b6yl79 p8h e1qomsx;a0i*v-wpo placed at the 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 the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed*x l9ospwvoaby1k4pt 7 6hq i0 8emv-; 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 = 5.0 nC is atlzfmy3)c w7hi4 k ;py) (0, 0). What is the magnitude of ty)34mcplfiz )7w h ;ykhe net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (3ay ;e.wz bx6i0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force one6 ibx3wy.;za the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices o+9ekjil1:kw adl:6 iy kg8(rmdcd w(/ f an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charr: wad c 6mlk:+8ewddykil1 (ijgk9/(ges?

  Consider point charges of +Q and +4Q, which are separated by 3.0rac ncps7:z - vp;di(/ m. At what point, on a line between the two charges, would 7-sap/z:i; pnr dv cc(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 omwa-1 lh*cuk*rigin and a +9.0-C charge is at x = 4.0 m. Where on the x-axiumaw h**lc-k 1s can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and chargen) 0)i7fe z8cy-cc3p x:kblyh -q is placed at x = 2a. Where can a thic cz)x:y 7-h0c8fpi )nyblk3erd positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot/mm dr7j*q46qihn)agb; eu u, al 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 af cwn6hx+tl*+1 :glgfd)kn: m fixed proton some distance above it. How far g h:)n lt*k1dnfgmf:w+l c +x6above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common p7st7jt3 k;8eh -bepg1n glxh *oint by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion3hg- l7xegn7 te18*j hbp;stk 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 magnitude of5p(zjb3(u ity the electric field at a distance of 1.0 m from the uj((bz5t ypi3 nucleus?

  What are the magnitude and direction of the electric field at a dista 9i2j:ffxffnmuv. t- 4nce of 1.50 m from a 2:i-jufvn. tff4 9mfx 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test csjk2/fw8l e)q bu(wr ,harge. What is the magnitude of the electric field at the location of tj bwl8rsk qwfe/u2), (he test charge?

  A 5.0-C charge is 10 m from a small test charge. Wi;at7kt7.zd-vu 7y fkc4d f 0rhat is the direction of the electric ycz7v-f0 ku ;7df ti4.tda7krfield?

  A 5.0-C charge is 10 m from a small test ch5 oma-*to7lnbarge. What is the magnitude of the force experienced by a 1.0 nC charge placed *olmb-t5an7 oat the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by at 6nrxt+j 5fx2 distance of 4trn j txx256+f.0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of az4rkx; 17+gfky+ e vyu meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electrkyx4+ugyr+ 1zk7f;ev ic field at the 30 cm mark?

  A 5.0-mC charge is placed az0oj m l*l2us4t the 0 cm mark of a meter stick and a -4.0 mC charge im*l2s u4zlo j0s placed at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC aree)y(nj p(g :hn placed at x = 0 and x = 0.20 m. What is then ((ey) ghnpj: magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are s 4xmdrw)7c) sat the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fi4 rc7sm )xwd)seld at the center of the square.

  Consider a square which is 1.0 m on a side. Cha :w74ftv jqbo(5( iqoarges are placed at the corners of the squar ( ooiq jqwva(t7f5b4:e 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 center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unifore0 (1d 6ua:n(adpa,en.xv v* lf cafo.m electric field. What is thelda 1, oa:*0fv(vaeenau ( dfpx6 .cn. magnitude of this electric field?

  A particle with a ch:, 0(shyew)/ xdy1,ea:/olq k uea,dt3wbpnwarge of 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 0.120 4ocg)9 4wtyw*) numfp,zgm. og is placed in an electric field of 6000 N/C pointing downward. What ch*t4 .4o m,wuym )z9wgf)opncgarge 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. The ballpzj4k y0zo1 y2 31hm5 dml1givyhcf)8vt 2tr/ is placed inside a uniform electric field, and is suspended against thyk hz32lgz0cv/ mo ih1r ydf)ptt52m1841yj ve force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnitu*: vyb jd 0-kl)ifjj+gde of the electric field 5.0 cm flvb0-j jg)i:d jk+fy*rom the sphere's surface?

  A metal sphere of raqvnze z:8i99 vu 08jsbl01sjwdius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 sn 810u9sivwv:eljj0 qbz8 9zcm from the center of the sphere?