State the law of conservation of electricg ln 0/(hbs,kp charge.

  Is it possible for two negative charges to attract each oth b:a(20vdy3-)t +ea zni)ugoysifel:er?

  Is it possible for a positive anmle :3rl ;8b ahdai)8xd a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodey o8h . q5qp6;ev(uup acquires a positive charp(5 ;yev68q oeuqhu.pge and the silk

  A proton carries a

  The model of the atom shows hlgij674r8qq7,: wn.g mjdb) :cvflka

  A neutral atom alwayo n*4qk 7ohs d7f4pdn5s has

  An atom has more electrons trx2ef ;ypu bze5)sp4 1gn.w s4han protons. The atom is

  Materials in which thex(+.ob ub xd0k electrons are bound very tightly to the nuclei are referred t+.xbbk (d xou0o as

  Materials in which the electrons are bound very loosely toy637emv xpzhj(a) y z9 the nuclei and can move about freely within the mat)jy3v ypzamhe 6(x z79erial are referred to as

  A negatively charged rod is brought near os-im2fp6qfh .ne end of an uncharged metal bar. The end of the metal bar farthest from the c fpm.hsf6i2 q-harged rod will be charged

  Sphere A carries a net positive charge, and spher 5vw.m 7 otx2i:pt3dofe B is neutral. They are placed near each other on afm7xtidtv p o3o2:.w5n insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscopefw7qt :6w fk3t positively?

  An originally neutral ele4 hi*h/r akh*b) mp)gnctroscope is briefly touched with a positively charged glass rod. The electrag bmr hph**hn/i)k4)oscope

  An originally neutral electros:v9;y - lrrn7 jfhrj)wcope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is remo)hrj9;7r:lfy nwr- vjved, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. T6kqfiukjw4 w1r-(dk8q o my3*hen a negative object isq3ki fkouw4w*m yrd(j q1k68- brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placdrra7.: o: fwwed 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 alon::wdwf.ra o7rg 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. What is the final charge on each ball?

  Charge is

  What are the units of the Cou)+9fsb kz) ws+ (g /cqulqh.cplomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cqwlqa 6e,n jmt;o0b82harge is larger in;aqlt0o86,q2 wnbe mj magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Th;9br+ifa5 1(6y pxx s4vnm8dpu0tai wey are placed near each other on an insulated table. Which statement best describes the 64w di 0;pb81(snai r+m uyfxp 9xv5taelectrostatic force between them?

  Two charged objects attract )d4y n9zekfxu1h6 ,z peach other with a certain force. If the charges on bo)y u1d6 9expnf,4hzkzth objects are doubled with no change in separation, the force between them

  Two charges are separatem0s*q9did +s5md / gqtd by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, whati dtsq5mm*sdgq 09/+d are the new mutual forces?

  Two charged objects attract each other with a force F. What happens xv *.h era1l5*km(rzxto the force between 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 isvm (r kxr*.ha 5x*1lze now equal to

  An electron and a pr leo1co7wfpbn7a. i 3:oton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton iinoe lf.apb37w :co1 7f a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance oft68), zp ztdrd 1.0 m. What happens to the magnitu)z zr 6ptd8td,de of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separate27 jx*najdfk ckh*;5/ex au8md by a distance of 1.0 m. What happens to the size of the force on the protex5; *uj knak 2f 8cma7jh/dx*on if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squ( 2y3hjqu+rvb0f5 fdz are. 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+u305r jzfhvqbyd f 2( 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 +Qooj/ 8j/ rs37xdwfpd) is placed 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 the center charge dxj o3pd7so/ d)jfr/w8 ue to a third charge of +Q placed at one of the other vertices?

  Which of the following+-af84fky p, /ll vjdq is not a vector?

  At twice the distance from a point charge, the stc:2tzej /:vg qrength of the electric field

  Is it possible to have a zero electric,bm xo7/6gr ,cvg han n9eaq:) field value between a negative and positive charge along the line joining tc a,9vhbq7eg6/ no,):angm rx he two charges?

  Is it possible to have a zero electric field value between two positive charges juoo95 d-h5ok akoo59- 5h odujlong the line joining the two charges?

  Electric field lines near psitive point (s u m2,u5xfyu* qq4pwcharges

  The electric field shown o yjs okt .)/ev)iow6/

  Can electric field lines*ne0 ty-xdoy8 intersect in free space?

  A solid block of metal in electrostatic equilibrium is pb :hyi2dgj ,ts2-xys2.7asnyr gum08 laced in a uniform electric field. Give a statement concerning t hysd07-,2gu yrag xn :miyssb 8tj22.he electric field in the block's interior.

  If a solid metal sphere au-w)-.y idi(bhwn o j2nd a hollow metal sphere of equal diameters are each given the same charge, thw uoidijh( -n y-).wb2e electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden ta qk jk4zr51co8ble in a region where a uniform electric field is directed stjq5ocz1k4 k r8raight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric ch63jyigz93f l:8fx;un 9qasyb arge

  A positive point charge is enclosed in a hollow m90-ddgjp/ ede etallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the /e ed jdpgd-09hollow sphere has

State three properties of conductors in static equilib9o0 ce0:j(ym n eolmv/eq:kg5rium.

State Gauss's law.

  The charge carried by oiu+8v8vp0qzd ne 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 x;xb0n 66j: pk7biebsufbu1 5mC. How many more protons than electrons does this piece of plastic hb6buu: p5 ien 7bx;sx0 61bjfkave?

  What is the charge on 1 kg of protons?ft- v+ih7mi2t

  An atomic nucleus has a charvj./nf tnk pjesy :o3. l14so3z. ihn6ge 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 valuer s9 bb ku26om+ch0rdb6i*;/5dx iiyf s of 2.0 and -4.0 mC, respectively. What is the magnitude of the electr xbyu;+rb*fd6 ki92rscb6/0iimd5o hic force between them?

  A 1.0-C charge is 15 m from a second charge, and thn- akrr u uz4+8laa;+yd*t6cbe force between them is 1.0 N. Whattd + ;a kruu+byzr4-c8al6an* is the magnitude of the second charge?

  Two 1.0-C charges have a force between nbzretqx13m-b.w7n5l(wvqh4g1xu3 w y w4 o9them of 1.0 N. How far apart are they?

  The force between a f cg;phd)1ur)o )gyq1$30 \; mC$ 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 1znk/8g2 u5 bqnp *cob:m a:g.f.0-N force. If they are moved to a :c28/b ka5nuzm q n*b:. fogpgnew separation 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. The first 1hjir adl43y 4 6pj;g*e)bqrx .6xmrucharge is at the origin, the second to the right at x = 50 cm, and the third is at the 100 cm mark. p ei*baxjrxh 4lr)3u;m1d6j4rgq y.6 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 of +2.0 mC is d m)9++myhtpz placed at the origin, -2.0 m C to the right at x = 50 cm, and + myd9+hp +tz)m4.0 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 following positions: Q1 = 2.00 mC at x = .n7p4 )lh.kt)ram)e s bdz3pm1.00 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 d3mmb ah k)p)7nz4el) tp.r .scharge?

  A point charge of +Q is placed at the center of a squd a5b ndbncz9*eb, vlp/o1m5-are, 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 chargev5 b1m pnd,nb-ec/z* do9lb5a 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 = -1.06britbr27 s t, nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of trt7ib 26b t,rshe 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, (0xgzh (9oybvma6 bd0 0.10 m); Q3 = 5.0 nC is at (0, 0). What isymadh0zv9 gb 0((b6ox the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC ar 8q8m+*+;j7cnb za xtonzjp7le placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the7mjxqj bzn+ *+ ;7ctlpo zn88a magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0u57 m qyh1a-d* lm3don m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such thatmmn - lq5adydo1u*73h 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 attw4+ zt ij)nvidklr,2 l:;3ey x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it i+nel2v t)4ri 3: yj,iw;ktl zds zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where can8 b8xac w 5-d9iz q+g2 h8/cxhsnfte+m a third positive charge +q be placed so t/8+xnd2cgxh8h bi e9 qmf5as8w- zt c+hat the force on it is zero?

  A copper penny has a mass of 3.0j v61.)e,ad +olrzs gw 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 againufb8t k-. :oum*qe4e dst the force of gravity by the attraction of a fixed proton te4q8.u-e dmb: uf*oksome distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common p:,blb8dm6z4k:(v ) w)qgxp2p hcgevu7 jxo*uoint by nonconducting threads wheg) bj46o,m *27vkw( dhuupl:)xxz8 qpvg:bc ich are 30 cm long. Both are 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 fl/:soaja2:hh..ktc charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nucl:kacj/:hf .t.lso2 aheus?

  What are the magnitude and direction of the eqtn-ig zkv: 8(lectric field at a distance of 1.50 m from a 50.0-nC char(iqg8 v-k :ztnge?

  A 5.0-C charge is 10 m d 3*db kv5j-ajfrom a small test charge. What is the magnitude of the electric field at the locatjj-db 5a*vdk3 ion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the ddvivvofd 1y7/h ;.b)yirection of the electric field?;vhd/y yifov.d7v1b )

  A 5.0-C charge is 10 m from a small test charge. What is the magnij/:377ktzou y: xhebk chb:0o tude of the forch o:hbx3zek u/ cy:tbo07:j 7ke experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have .adqc) t 7qknv8t88vxa value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway b)7a k.8 qdq8vnttc8xv etween the two charges?

  A 5.0-mC charge is placed at th 2.qpgtq8,tt he 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm qtgt,.2q8pth mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark26hnnj fga0 -8bl.mfxpucfrr3v : y9. of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joinin 8bf9uy3f c.n -m:0lgrxfnv aj rh6.2pg the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 acbhg4t)cq3du d8,-te nd x = 0.20 m. What is the magnitude of the electric field at the point midway between tb 3dq,egt4 cut)8hc-dhem?

  Three 3.0 mC charges are at the three corners of a square of s* k*/ie iebdy-ide 0.50 m. The last corner is occupied bkdeeb- i yi**/y 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 hcwc3zi:r* 4p placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC acz*3 r:4phwcit (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 i qx)jgapbur/q-96/+sh bey)es,a7xh s placed in a uniform electric fi)7e+s//rqu)xja 6 qp,9h xhegabby- seld. What is the magnitude of this electric field?

  A particle with a charcv( -scqy*1lfgem d5;ge 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 g is placed in an electric field p lo3v4jdk;f5fa: .f fp0m xv/of 6000 N/C pointing downward. What charge m0of/vpkd pjl 3f54;fma: f.vxust 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 ball is p1 qszycz9t2 d3ekk 0 6hrw59cblaced inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direckd2zty06 9z9s e k1wrcc5hb3q tion of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Wh/habjzg+j cbc)6,3am 1aj:on at is the magnitude of the electric field 5.0 cm fr/ 6a,aca:j+n)mz j h3j1obcg bom the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the eleop9c iv:7v) he*dwv: qctric field 6.0vo e*dpw7hv): iqc:9v cm from the center of the sphere?