State the law of conservation of elecah ;d3soti0,j tric charge.

  Is it possible for two negative charges to aha*ol,9 ia-90 uc izn7a/cvarttract each other?

  Is it possible for a p.wvymlsq r ad+m2z(4d,q.r8m2+y kpn ositive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process 0,:te v,-a ag*mseb hethe glass rod acquireee:h*0e, matbg-s a,vs a positive charge and the silk

  A proton carries a

  The model of the atom ov s-nk8v.b1rh4dlt /shows a

  A neutral atom alwaysa4tq u.,wntk4 has

  An atom has more electrons than ot4lyw3 s2ra+ff 2g .5gzav-n protons. The atom is

  Materials in which the electdj8fkn1.x;c3ahsj . v rons are bound very tightly to the nuclei are referred to 3x.1k8hnj;fs.avc djas

  Materials in which the electrons are boundr0g6dpl7uz :g very loosely to the nuclei and can move about freely within the material are referred trp0g:7 ulg6 dzo as

  A negatively charged rod is broug+vn. -rc h8n.bka7 zeixt0ru.ht near one end of an uncharged metal bar. The end of the metal bact+rk 87 rnb.n0h.z.-vx uei ar farthest from the charged rod will be charged

  Sphere A carries a net bc t)6wa kru.2positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere.ak62wb)cr u t B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope-7 qsl( +tqjk2wqwju 8 positively?

  An originally neutral electroscope is briefly )o1rlc2 .bhwf gj,i;ftouched with a positively charged glass rod. l1,j).2b io wfg c;hrf The electroscope

  An originally neutral electrosco1dc8xnf 5ze2 upe is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the nefxdu281cz 5electroscope

  A positive object touches a neutral electroscope, and the leaves separate. ea cg9r:w4 dqf(e4ba9Then a negative object is brought near the electroscope, but does not touch it. Wha 9ac:ee ra(wdq b94f4gt happens to the leaves?

  A large negatively charged object is placed on an ins7 .ef*u,nxnjj ulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral me,n7j.fjeu x*ntallic 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. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constatip(hvpa p4)re)ep ;e( 70 dxint $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distancugfoxfkv 3k0p+k, l-p7ux, 3ke d. The first charge is larger in magnitude than the secox p,u0lfxk-7fkk 3 kuvo3p+,g nd charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed neaqo (,sms a ;e8*fh6p.vu y)jner each other on an insulated table. Which statement best describes the e(e;sh 8 uv.np) eom6,q*s ajfylectrostatic force between them?

  Two charged objects attract each other with a certain force. If tbfy(gy(o 1 ,smhe charges on both objects are doubled with no change in separation, the force bef1s( ymgbyo ,(tween them

  Two charges are separated by a distance d and exert mutual attrgry sn;:e8 0 ovtbq; -l7sv)aqactive forces of F on each other. If the charges are separated by a distance of d/3, whatvnqt:o)-7 s0;blvra s;y 8egq are the new mutual forces?

  Two charged objects attract each other with a force F. What happen m ef+0t8buhc/,gtvv3s to 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 is now equavc8e0+3t vgmfhu, t/ bl to

  An electron and a proton are separated by a distance of 1 sh+;z2pdh7 vj.0 m. What happens to the magnitude of the force on the proton if a second electron is placed n s2hvj;hp +d7zext to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happ*q+:l ob kp sjxx)b:fh (wh19mens to the magnitude of the force on the first electron if a second electron is placed(j fpo shq* )x:9+bwmk h1l:xb next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. tkour40r,rsen2 g 0hk;t f.:d What happens to the size of the force on the protong e. ,:u4kfod0s0k2nrh t;rrt if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. Whl(, 6g1frb nzgen 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 thbnz,gfl(16r g e net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is,m8ryx o(h/kd( j*ymq placed at the centroid of an equilateral triangle. When a second charge k d( mj(,rh/ymqxyo*8of +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 the other vertices?

  Which of the following is n () e.las1iq2 ,zjdc8at/p lcfx; 1atnot a vector?

  At twice the distance from a point charge, the strength i g:s,umu5,0rglxz h,zedw63of the electric field

  Is it possible to have a zero electric field value between a neg ioxnwx5 vpx(i5p;s4,zoo 5j/o fc 0f3ative and positive charge along the line xx5cn of34 /pp( ,vw fxizoi;5o50josjoining the two charges?

  Is it possible to ham( m)i3iwevh: t9d uc(ve a zero electric field value between two positive charges along (3d:vmie9) mc (iuwht the line joining the two charges?

  Electric field lines near psitive point cha/1k1)be 3wi /lur1gdr8rmh/ s niql)mrges

  The electric field showd-xi o ufnkbn iy 1s-4w9z4,*:p :gxzan

  Can electric field lines intersect in free k5f6b68kt s yfspace?

  A solid block of metal in electros/o99mc11p3/ bap2ce jmu p hbmtatic equilibrium is placed in a uniform electric field. Give a statement9chb c2/ mub9emm/p1 ap3o 1jp concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere o0 4k2ro+m(sttgu j3ipf equal diameters are each given the samek2+jm sgt ou04tir 3(p charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a reg;x snrzf,5wpk37 d+a-k+r qts,ju8 ue ion where a uniform electric field is direzkjeq;r7n-rpsd ux+a3,+tku 5,w8fs cted straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electa.yv55ji bhtn* ua( +rric charge

  A positive point charge is enclosed in a hollow metallic spmf:nwc kx (7n e.r5zthhr5 (2nhere that is grounded. As compared to the case without then 5rz fr5kh7(cm w2het.x:n(n hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equ kursthi94umi i(j(3( ilibrium.

State Gauss's law.

  The charge carried by one ey;iajgo lonyea59 tis*r0 .4-lectron 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 k1afw rm f6 3zo2o;vwc57sw( mthan electrons does this piece o;wo 2v r3 a5wmw7(m6ffc1zksof plastic have?

  What is the charge on 1utw*/ye()v 9cka0i m a kg of protons?

  An atomic nucleus has a chat 3a3(dephvcm0 8nc,lrge 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 valueyeuv2 v2mf:5 q: roh.os of 2.0 and -4.0 mC, respectively. What is the magnitude ooryv2q:ue5ohf 2 m.:vf the electric force between them?

  A 1.0-C charge is 15 m fro9wz:r wxvw8iwq ul mj(e.-k*2m a second charge, and the force between them is 1.0 N. What is the magnitude of the second:lw-r *uz( qe2ww k i8.9xwjvm charge?

  Two 1.0-C charges have a force be)azos(o,lf fvr : hugf)51n8mtween them of 1.0 N. How far apart are they?

  The force between a nz +mj-i(o 8w0x*:uewyx7msy $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 208v o/7(a n t6abxpra85mmbdn .0 cm apart, experience a 1.0-N force. If they are moved to a6ba 8r av5p/dm 7an0o( 8xmbnt 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 fz3xsyv7)fc l0s )(wiwirst charge is at the origin, the second to the right at x = 50 cm, and the third is at thec)swzs) w0xil 7f3 (vy 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-axis. 5w+ tp6fxb2f kh-g ,fsA 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 acttb-xs gfffhp+,w65 k2 s on the charge at the origin?

  Three point charges are located at the following positio(- bd anpjb)b- gsdc:/ns: Q1 = 2.00 mC 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 of the fo/b )p ja:gsbd bdcn--(rce on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a squayhb j p*.tij,29s*syore, 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 ce ,9.b *yytspoihjj*2 snter. 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 = 5.0bxt,qnmb 6)+s nC is at (0, 0). What is the magnitude of the net force on 6 n)+bbq,xtmsthe 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); rt1d)j5sh ,ys Q3 = 5.0 nC is at (0, 0). What is the t r)y1jh ss5,ddirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertice g:1 4brwaz 73ylpkw,ts of 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 charges?ap1y4t,7w zglr k3wb:

  Consider point charges of +Q and +4Q, which are sep1)s6huw33usy9ujpv+)lh qzsny/ 5h qarated by 3.0 m. At what point, on a line between the two charges, would it be possible to place aq v6sh)z hpjw1yy9hu+5un3ss /ql)u3 charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origdwazoym));gn a9 ,u.zin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a thiaw 9.))g;za z,on dmyurd charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin andrq6yjh bn13(u charge -q is placed at x = 2a. Where can a t(6ynbq 1rj3huhird positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A to56mlf9awg9g stal 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 attractij3e 9ar 1a8ikion of a fixed proton some distance above it. How far above the elect8a9iik3je a1rron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductinnq75kva4cr )/te2 ggmg threads which are 30 cm long. Both are given identical charges,m/eg)2g v 5rc47tankq 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 charge of +40e. What is the ma/o5 4iuxk(law:lem7a io.-ingnitude of the electric field at a distance of 1.0 m from tm-ina u7:.iil (e4a lwo5kxo/ he nucleus?

  What are the magnitude and direction of the electric field at a distance 4dn(de9 5, +bjnz0g:hssecm hof 1.50 m from a 500g(n+d9, jzh nsc4sb : ehm5de.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magni8s9ept. vb +qxtude of the electric field at t bs9 .8vpt+exqhe location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the83 n qaznfqm b -2(+6v9)uvqiizwy j5e eea9 f vz- y8+i( 2v3uqi)qn6jqmnb5wzlectric field?

  A 5.0-C charge is 10 m from a small test charge. Whi6zm i-zl*yz1at is the magnitude of the force experiei6yml z- *1ziznced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each hf+ 19oa xso( xkspuvn; ;ai)*mave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway* v)ka f+ umsxn ioao1p9;x(s; between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.05 7 ubux0diw/6 pipv,4nh9 eanf+zr:c mC charge is placed at the 50 cmxue,u:d4 0z + cr vn/awi5 hpfp69ni7b 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 anr:7ek+, l zbmud a -4.0 mC charge is placed at the 50 cmzu7r+em,l k:b mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC an;ayn5fmr x7uaz *:+w iuu9i r9d -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric fielwy ma;u57fzn+ iura9xu9: i*rd at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. o+n9 n/2brian The last corner is occupied by a -3.0 mC charge. Find the electric field at the center ooi n/r29nna+ bf the square.

  Consider a square which is 1.0 m on a side. Charges are placed at *n vv)we)wwxrykoq8) o.bd .1the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0)re.w 1)k8wqvbw )) .yv *oondx; -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 w fydgd(4 z;3jthen it is placed in a uniform electric field. What is the magnitude of this ed3 ztf;4jgy(dlectric field?

  A particle with a charge of 4.0 mC has a m23cba -yi hvr cw;.j7lass 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 u puae15c7k e0nv ea5/0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the banuv7e5auk0 ec e1pa5 /ll for it to be suspended?

  A foam ball of mass 0.150 g carries a charge yuphn+14 si1dg (tmc, of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agains ns1 p+h,yd4igt1mu (ct the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriejpdp 7k4l 0/ww-lb7 yjkm)d*es a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfacew- l* jdp/ylbjdk)k4pe7m 0 w7?

  A metal sphere of radius 2.0 h ocu+ d*do9sd2zhzv8 m7p/pu-j ; s5kcm carries a charge of 3.0 mC. What is the electric field 6.0 cm2 z-ps umjd*;hk/zpo scuv +75doh 98d from the center of the sphere?