State the law of conservaf87kcw nu4a) .st*ii/cqi x ;rtion of electric charge.

  Is it possible for two negatil4vzt4bh2mk 6e)) w6f ju oz+tve charges to attract each other?

  Is it possible for a positive and a negative charge to xz f*9fca8,kd attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gl-19lo; cox (imo/s ieuass rod acquires a pos-/o(1emos;u9cxoi li itive charge and the silk

  A proton carries a

  The model of the atom shows ugr/d13yua1 1qj0kd uddqd zm)20z7ya

  A neutral atom alwayst ;t eoo)mayh825xn 6i has

  An atom has more electrons than protons. The atom isk(hz f,bq99c*i: sqmwcs +pov 6vh) 2x

  Materials in which the electrons are bound very tightly to thn .5i4zl;kfful 7jn+qe nuclei are referred tozk .nflq;in5luf +4j7 as

  Materials in which the electro8 8dj hmut*ei. bg.dg;ns are bound very loosely to the nuclei and can move about freely wib eu*it.g 88h d.m;jgdthin the material are referred to as

  A negatively charged rod is brought near one end omyxjp6q+ 9fhi-, rr 31apj)t,zoe eb*f an uncharged metal bar. The end of rjm6qez 3f)x-pitj+, *y9 ,1brapeohthe metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are p uhhd:qp:: v ++)zzvnmlaced near each other on an insulated table. Spvp+h:mvdq::zn + zu)h here B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chaupe/uzj3w, 4 ; xi8vkrrged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a pu2;g:oj.2 z5m tw uwgdositively charged glass rod. The electroscop52zu.gg tumw;j od :w2e

  An originally neutral electroscope is grounded briefly while ak ax cpfj:)b7yg u:)l9 positively charged glass rod y)g fpjxl)7 u::akbc9is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves ;qua u/q52ru - b pkxxdbjbgn7;(gt 0.separate. Then a negative object ibx57r j buqd(0bax; k .ugp ;/u-gnqt2s brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an 937k*wpkfb-v c a/ khiinsulated 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 nev-9wpk3h ak /7cif*kbgative 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 Coulomb constanwaq79jrkg bbm 5c)5;h t $k$, which appears in Coulomb's law?

  Two charged objects are se0j*jdvfq)yzur::b i4pzawj : .4x.ms parated by a distance d. The first charge is larger in m xim jwuv: qd : jrfa.zs:0)p44*jyb.zagnitude than the second charge.

  Sphere A carries a net charge anuazos+d3 f0j mu4d pg 5h4e,i1d sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electre 14i,go4 p+30zasudjdh5ufmostatic force between them?

  Two charged objects attract each other with a certain force. If biq jpeg-gh:p *)6j) i2yp/bythe charges on both objects are doubled with no change in separation, the)gpj*2e-h p:p/ )qbi6y gbjy i force between them

  Two charges are separated by a distjg;cz)7 s:(i 5y mls(ghyl- hqance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3qmys lsjh;(gc(g57 h)l yz-:i, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to thel,l qr9qix 4 z.w*7mcs force between them if one charge is d,wmq.xc 9qr*siz7 l 4loubled, 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 5mi or/dnpc4 yp8 vd6eb5x-r 6a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to r4pcobnv5 5y i dr/6d 68m-expthe first electron?

  An electron and a proton are separated by a distance of 1.0 m. x9 8u8o evl/l7pd,mnfWhat happens to the magnitude of the fex8mdv8,up 9l o/7lf norce 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 happe zj *dzb(z3cq9ns to the size of the force on the proton if the electron is moved 09*zz3cq bjdz( .50 m closer to the proton?

  A point charge of +Q is placed at the center of jx22i-uqthk 2a square. When a second point charge of -Q is placed at one of the square's corners, it is observed th h-uk xjt2i2q2at 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 trianglemv;:yrp.ith73 x8 ly 8ul4+gb rsu5wf. 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 one4u8y7ur:v+f.x3m 8 r y l;tps5 ilhwbg of the other vertices?

  Which of the following is not a vectowaif5d*(lu e4/9 epzir?

  At twice the distance from a point charge, the strength of the electrinz1y, t0f+w4g9g, wtmtsf g.mc field

  Is it possible to have a zero electric field value between a negatdj.ea(j6 j+g--hcp/g dwjl s6ive and positive charge along the line joining the two chjh jc a-d6l sg/j(e+.g wd6jp-arges?

  Is it possible to have a zero electric field value between two positive 8y21 6pl5h 1brogp keten mo+3z,7fjqcharges along the line joining the two chaz 1om 5t6eboe,ghplkq 7r32y81 np+fjrges?

  Electric field lines near psitive point chau;hzxd xmi+//rges

  The electric field shownph qgo9kglsv t*qiq 4h;* 7ggd.24i1c

  Can electric field lines interg9d:1f5 o.:e rbvwusrs9e y+ksect in free space?

  A solid block of metal in electrostatic equilibrium is 0gt5 pwud*fa8zbmy bze31f *, placed in a uniform electricgze z tuf y*,8m3pb*a0d5fb1w field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal dil92* u2r e0f(hksffhfft-h p 9ameters are each given the same charge, the electric field lff 02erhs9p-9* kft(2 hhff u(E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where jw k2np9l t7vhp 9)wz*a uniform electric field is directed straigh*nkpwwz vl) 2jtp799ht upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chargem0b-7o9av o ml

  A positive point charge is enclosed in a hollow metalmbn .a+ky/:pv lic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow svkmnb.+ /p:ya phere has

State three properties of cpse-(vz.fe:1p txup)9fkv :jonductors in static equilibrium.

State Gauss's law.

  The charge carried by one 8f8bw-u akd p.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. Howq2/o(krvz+u. w7 n.;wdfigq j many more protons than electrons does this piece ofo7iqu.q rw w gdv2.+f(nkj ;/z plastic have?

  What is the charge on 1 kg of promt-(7 ppi ;kxjhy-j1 ttons?

  An atomic nucleus has a charges p1yb3c/ /eaq 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 anr6v g-7uucxvq) 46hj gd -4.0 mC, re-guu r4xc gjqh7vv6)6 spectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them y euw0/62 hzsb*k f b.r,s3w) hrd+fyfis 1.0 N. What is tb 0)sh2b6+f yf ,w/ufsw yzk.er*dh3rhe magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far-z kaeq2 6q )o6smyii6 apart are they?

  The force between a a* )a ml oxkg,4mjzs);:o nn9f$30 \; mC$ 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. y8k7 d zyt;u vus:0qbck663sj0-N force. If they are mo6vqdu;kz7b 3 6:ss0t y jky8cuved to a new 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 cdy(8ej: l4o nvharge 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 for4elyj( :v8d once which acts on the charge at the origin?

  Three point charges asqy5l.y bo3s7re placed 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 7oy3ls.b qs y5cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are lo +3nnrfl xhn ikxet0xk)4f2*,cated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mChrf*xe +3 i2xxn l,nnfkk)40t 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 t3 0y1)ofn) mop mqyh(square, and a second point charge of -Q is ) otymy(1hoq 0 n)f3mpplaced 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 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 =pr:z ,ukm(h2c 5.0 nC is at (0, 0). What is the magnitude ( :,cumrzhkp2 of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0(y b-n*kzi b/n nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction kn*zbi/ -nyb (of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilaterarar+ 45u ,i u)a9h,mgs y7,mtoflg-crl triangle which measures 30 cm on a side. Whatmrf,ri ,-,)lg7a4autog9 +hyu r5cms is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q sp ;hk0c0h y)/ 5pncon-n5try, which are separated by 3.0 m. At what point, on a line between tk- p /tcy;h5 n0ysp crn)0ho5nhe two charges, 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 th50:i r; ok7xp)uelu gde 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 ne ;u iox750:)euk prdlgt force on it is zero?

  Charge +2q is placed at the origin and chargex h2bbubh2,z-(ps ,fi -q is placed at x = 2a. Where can a third positive charge (2p b,ibb,s ux2hf- zh+q be placed so that the force on it is zero?

  A copper penny has a x9jayx 8j6wmrm,- ,r tmass 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 ggnrtlna0j/oq 3zh)ycw 4mj1ci ro)8 xn */0 (force of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the p3yh0z)w g1i//gmntco r 4 cna *j)xn( rqo80jlroton?

  Two 0.20-g metal spheres are hung from a common point bd6y */pzxmew y76k qft+; okn3y nonconducting threads which are 30 cm long. Both are given identical charges, and the el mt keznpwq;d*y/+o7f3kx66 y ectrostatic 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 char*bk,sa/u / byn*.pfgdge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from the nuc bk s*a/udp*g, by/.nfleus?

  What are the magnitude and direction of thz )n viuac8+i1azz +c+e electric field at a distance of 1.50 m c i1+nz)8u+cvz ai +azfrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from po9 ,jsk6kjr ucv*5gg9ayu2. a small test charge. What is the magnitude of the electric field at the location of the test k*jaykrj 9g.p5o9u2v,gu6 cscharge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction b +e kba m1om3fqu aka7t(,p*.+l0zesof the elze.e k um 01*akm+al,sp3t+aq fobb7(ectric field?

  A 5.0-C charge is 10 m from a sm)0desek:1xt iall test charge. What is the magnitude of the force experienced by a 1.0 nC charge pl1k:six0de e t)aced at the location of the test charge?

  Two point charges each have a value of 3.04cfw nsci5//j C and are separated by a distance of 4.0 m. What is the electric field at a point 5i/j sc/wfc4nmidway between the two charges?

  A 5.0-mC charge is placeoz-)c x 1ivtp3 ;/uu6 0u3x0piqskx led at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the elus 3i6qc uutzk-p1 v)/0;3oixlxxe 0pectric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickl d* 3tpjx,oi: 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 fiel potd: l3jxi,*d zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = g (t70eijgjpdtr )z/) 0 and x = 0.20 m. What is the magnit)0d/tt ripzj(g) 7egj ude of the electric field at the point midway between them?

  Three 3.0 mC charges ar4p3a5eu ;q bzm3bygk5+rggwn6 9p 1txe at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find theg;g61b 55 q ap3mueb+n9 rykg3xwtz4p electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at ththuhxx5 -t8 d+3ue i ;k7o.yqhe 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 elecq8t-x+h3eo. xt7hhk;u 5uyi d tric field at the square's center?

  A force of 10 N acts ox l78/wtfmp 3in a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitmxl8f 7/3 tpiwude of this electric field?

  A particle with a charge of 4.0hm(f:7fipe w 4 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 fik gjge, mj o*w(j0t-9veld of 6000 N/C pointing dok e9,j*v(w0gogjj -tmwnward. 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. The ball is zz/nf5 ;vb z aad:2p4dplaced inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric fied:vzz4 f2p5an db z/;ald?

  A metal sphere of radiboxz7 n vi/ (gj4+ee3nus 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm 4 og3 7nbn+xejz(v e/ifrom the sphere's surface?

  A metal sphere of radius 2.0 cmyuy372v 5a13dv.kbq wqi c.jh carries a charge of 3.0 mC. What is the electric field 6.0 cm from the 37v. a2 bwy1dh3kj cv q5yuq.icenter of the sphere?