State the law of conservation of electricasf 4g9 fo5lghnlv-q3 )4xx:v charge.

  Is it possible for two nega ;x2 ux0jvd*tc*)nnwotive charges to attract each other?

  Is it possible for a positive and a negative charge to attr5jypi wmp82z v:c b.u,act each other?

  A glass rod is rubbed with a piece of silk. During the p 2 85ppc1kcc+yc; vrj26vm jwirocess the glass rod acquires a positive charge and the spv+56pcr2ywi j;8 2 1mkvcc jcilk

  A proton carries a

  The model of the atojf,jb:y-ht7 t wbl0 :nm shows a

  A neutral atom always nr //ni/cvw 9x .e9fcxhas

  An atom has more electr8q6/xzynniyi px9rj8+c6 w(kons than protons. The atom is

  Materials in which the electrons ar4w5t*cjl /c.rui2z ivg(:hsie bound very tightly to the nuclei are referred to asc/itiw*c ij2ulgrs ( .h4z:v5

  Materials in which the electrons are bound w ;xb9rfe) b,tt84fb mvery loosely to the nuclei and can movmbwe ;tbxf 9r8b4),t fe about freely within the material are referred to as

  A negatively charged rod is brought near one end of an tjo6ksc6hvs+rb8 ,n+b 0jrg7uncharged metal bar. The end of the metal bar farthest from the charged rod will be charge0b 6cohk 8, 7bv tj+6rs+gjsnrd

  Sphere A carries a net positive charge, and sphe) udv6hs+ wc6cre B is 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 cor+6dusvw)hc 6 crect?

  How can a negatively charged rod charge anp08u *r ;ga urw .xnirnd4tlal9y)w ;1 electroscope positively?

  An originally neutral el9:ut k+ a9msclectroscope is briefly touched with a positively charged glass rod. The electrossk 9 9:c+utlmacope

  An originally neutral electroscope is grounded briefly while a positively char qb2(dob 3yny)co g(jr+qjn5p3e t(* fged glass rod is held near it. After thecoy2(b(f5jdeyopn jn 3) qqr3 g+t* (b glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separatee )8o oi ni+n m-bp(8rapdam/4. Then a negative object is bro+n/e(oi- iapm)pda 84 onm8br ught near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged *9 j9yyfr(kub ou*ow, 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. bf9o k*yywu9*uo r,( j 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 C3y5lp rpj4lpgqo7 -42ce u 9sroulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger w 2k0rgh9 *ytpin magnitykhg*9rt0 p2wude than the second charge.

  Sphere A carries a net charge and sph, zcac 8 egsa92h4/qgsere B is neutral. They are placed near each other on an insulated table. Which statement best descg g8 cashz s,2e4ac9/qribes the electrostatic force between them?

  Two charged objects attract eq 0ppkpa 02bm0ach other with a certain force. If the charges on both objects are doubled wi p0km00a p2bqpth no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forceud.c65vkr b 5qy 686eiatdu n7s of F on each other. If the charges are separated by a distance of d/3, what are the new mutua7566ydu 6c8tvd .abe 5 urqkinl forces?

  Two charged objects attract each other with a force )n)v2,l/ ip8h kzfj **.citaiy6 cadjF. What happens to the force between them if one charge is doubled,ci 8i2c n), thz*fvydaj ja/pl6.ik* ) 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 separated4iw5c q3j 4xrl by a distance of 1.0 m. What happens to the magnitude of the force on the proton if ac 5wlq3rixj44 second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens tznfg*vhmh w )4n9b (:ao the magnitude of the force on the first electron if a second electron is *w(nf z 9bv :mhn4)ahgplaced next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happen0fp*q vu0 k6ocs to the size of the force on the proton if the electron is moved 0.50q60pf*0cok vu m closer to the proton?

  A point charge of +Q is placed at the center of a square. When augl0; nbjuxd)y .t o96 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 the net electrostatic force acting on the pxy;09goutl6 bn .duj)ositive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Whee6u0-c zwxyw( t + e2wqpo;8vqn a second charge of +Q is placed at one of the triw( pwq08v6e-t uoc2 e+yxwq z;angle'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 norrw: (wxyr,h5ed) k,e t a vector?

  At twice the distance from a point charge, the strenr ,xfw0czz 9e)bi)gs/gth of the electric field

  Is it possible to have a zero electric field value betwso( s6tj4cw4eeen a negative and positive charge along t4o6cj essw4( the line joining the two charges?

  Is it possible to have a z4, d lj )qff-u-igjm.fero electric field value between two positive charges along the line joining the two char, mg)-ffd jq .ufl4-ijges?

  Electric field lines necahj+(ygmo2+lqi1 +x ar psitive point charges

  The electric field s5*pyn-f/gp( w3j7uy dkt (wb phown

  Can electric field lines inte492 2z5m yfhcmnub l*8xgkqz*rsect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unmaj fhu0w0:6m m42wmn f1jr) giform electric field. Give a statement concerning the electric field in the blockjm0 mwf4m0:mwg6 ju1 2 arn)hf's interior.

  If a solid metal sphere and a hollow gd(lp,lqhz6x1b7 wv 2 metal sphere of equal diameters are each given the same charge, tqlv ,lh2xd1 zw7b6g(phe electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests ogixqbe-w(f 1 h.n.os(n a wooden table in a region where a uniform electric fielde xwh1 -nq(.( bo.fgsi is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic eqkig,*) s13ugtk uye-(q5t vt7lfto6 fuilibrium near an electric charge

  A positive point charge is en4g s dm0 du-zlwc:,q.gq 0fkj-closed in a hollow metallic sphere that is grounded. As g:g ,.wqdmlu-0 kqz0sjd- fc4compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibznk1 tfl1etuhp*4 v4+rium.

State Gauss's law.

  The charge carried by o 2ywe*p q0t,emwu859 li yl9bgne 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 r47 ie 4n. w5iqvz9+gvmwcg7lg39f dccharge of +2.00 mC. How many more protons than electrweg7 d 9wm.95v4+iq7zv4gr3 lf cicgnons does this piece of plastic have?

  What is the charge on 1 k2q;0-dzaj lsk 1(r/hbyotv h7g of protons?

  An atomic nucleus has a charge owx e pldkz(d p +uqz9r-pf)(//f $+40e$. 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 wao/ ).mh+5e tft4e4j7t nepcvalues of 2.0 and -4.0 mC, respect p7nfewt4)/c j4t+hm eo5.teaively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from shoc,7r-g3zqt. l1dna second charge, and the force between them is 1.0 N. What is the m h - 3qgnrdt,cs71l.zoagnitude of the second charge?

  Two 1.0-C charges have a force betwee3:93-l/t rtxb) tbkb b.rwz ypn them of 1.0 N. How far apart are they?

  The force between a i.l/w9 x8vx d-*cdkwf pg/vru:e3z be,yz:5m$30 \; mC$ 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 1.0-N force.tk 3,1 d 3okt5h.r(k(fpozsdum-h3 bl If they are moved to a new separation of 8.0 cm, what is the k-., d uphzhd(fb1t ko3335tslo(m rkelectric force between them?

  Three identical point charges of 2.0 mC are placed e5p- vm06: (zsfgxbdjc n(cl7 on the x-axis. The first charge is at07g 5e nvzdl(m:6s-cbf (jx pc 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 the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is place60x,ite 9lrtxy g8)l jd at the t ll0gjx x,9e8ryt6i)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 at the origin?

  Three point charges are located at the following positions: Q1 = 2bhnx8wgi8+dk,- k8+bw of lg0.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 m8bk+ol8b g8h- ww0ng+kdix,f C 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 d7 5nfzyt(/9t+ tzh oxpoint charge of -Q is placed at the upper-left corner. It is observed that an electrosta 5dt7(zn+fz ot/ty9hxtic 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,7 r r0xtwq w3zzy0, txd3job( (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the newtz,(j x3q w3xb t0r 07zydo,rt force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m,8azeubp2 gp v vz37r82 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). b zr83827pugz2av v epWhat is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0:8z s,*yszkvz d,.tva mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of theakt8y *s,,d:vzsv .zz electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separate-zv02 p kdb)aed by 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 electrodv02-bzke )ap static force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. Wheyu) 6frs9oc-xxnlf7; re on the x-axis can a third charge be placed so the net force on ioyx9 ) r-;fun6l7sfc xt is zero?

  Charge +2q is placed at the origin and chargee nvjpnv: wt9 px;f(84r 4vfq- -q is placed at x = 2a. Where can a third positive npwq4f 8p;4rj( nxv9:vtf -vecharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A toi+m9 yk1w lxlf 7p37 pq2kw(,eaf tm*av3u 1wwtal 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 qj1ew0u6kfzwp7ol73i ecbu)3a *fa0 attraction of a fixed proton some df b7k oi6 wjue03c3 a1*fw7ueqp)alz0istance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common po 1 5ph lmo.ninhk sm-2*gfvi12int by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apa lfnmv1m*h1p2.2 ih ni5gk-so rt until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of x ;,nw75 fcc*vu qkis6+40e. What is the magnitude of the electric field at a dis*quv 6ncxi7s; , 5wckftance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a dis*9(: jjt8y; rzdkl/*klo-dzd q ,s ejhtance of 1.50 m frod ,zj 8:q*j j l*;9yek(zls- d/dtkhrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small te6a nbxv,g:h.z fc:sv. 9et wg)st charge. What is the magnitude of the electric field at the location ocz.h9 ggx,vt6v wf:aeb.ns):f the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the + 8pm;cyia,enizbz -;direction of the elece;b8yc ;,z-pi n im+aztric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magfjm v5rxp.; o rb.6.ganitude of the forc5;mg fpxrv6 ..raboj. e experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have anm5fw5 tz7j.mw(7c rn value of 3.0 C and are separated by a distance of 4.0 m. What is the elecm7n mn(7 fjw.5r5ctwz tric field at a point midway between the two charges?

  A 5.0-mC charge is placed ebk ma ,ce,(mg(mp :cl24 fps9at the 0 cm mark of a meter stick and a -4.0 mC charge icbe2( mgl(,9 mappm,k4ecf s:s placed at the 50 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*l3whsy-(hy w and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charglyyh-ws*w3 (hes is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed atghuuwn, i1s*jes3f3zxfqx5 d soh10 knx.7++ x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between them?es0 z 5x +1 jfuuxw hx+f,hon3gdn3s7*ks1i.q

  Three 3.0 mC charges are at the three corne vw6btm580p o/qfujc- rs of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the m6b0vt wop c-/fq5u8jelectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the 09bql+eteuasq6isjfpmp67 6 3 y;ht(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 6a eb7 fis3;pqlh6estmyptj q0u+6(9of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is ;sukh0p6* bnn+o-ltd placed in a uniform electric field. What is the magnitude of this ehpb;ont*s+ l-n 0 6udklectric field?

  A particle with a charge of 4.0 mC ha4 f- wwax(b.jll 5ygc,s 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 ofy 4/q6xfm, e/ sp4aamq 6000 N/C pointing downward. What charge must be plac 4m6,faemq/sq/ x4 apyed 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::bp ) ft6sc8h7/d6zhnk mdczc2l2no is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric fid k2:7ct62c6)/zdl schfhnbzm: o pn8 eld?

  A metal sphere of radius 10 cm carrw -:aoosq snwvt*b *e*7*ab5uies a charge of +2.0 mC. What is the magnitude of the electric field 5.0 t*we an*bobuw7* s:s 5qao* v-cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What u 4 6b-eowpizni-.dn 7is the electric fpwb- e 7d.i nuio64zn-ield 6.0 cm from the center of the sphere?