State the law of conservation of electric n(q rr r8+or42fcjy:echarge.

  Is it possible for two negative charges to attract each n2v ,fr03m0utds 8pod other?

  Is it possible for atu37kx cjvenb30l4*vj2 nt* s positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod 4kb;wwb0-ah fk7l5+w pvsbm . acquires a positive charge and the s5 w b b.lw;kpm 70a+h-skbwf4vilk

  A proton carries a

  The model of the atoom kithg7rui9y)w x,-m,u ;f 9m shows a

  A neutral atom always ha+7)nr,fe1nm leh hp6rc(1c i as

  An atom has more ele+(qg61pk)a n+vth dtnj* ( jvh,8noqwctrons than protons. The atom is

  Materials in which the electrons are bound very tih7(sx zhk 7xium-(f n1ghtly to the nuclei are referred to nfmz7-(7u 1ksx h(xi has

  Materials in which the electrons are bound very loosely to the nub iuey-v;7yw3: ,fzoa clei and can move about freely within the material b,z ae:vwyuo7- y;3if are referred to as

  A negatively charged rod is brought near one end of an uncharged metal b ab5as5::bwecar. The end of the metal bar far bb:aacew:5s5 thest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is nevqw:ortp; 5kjxx64 3 jutral. They are placed near each other on an insulated table. Sp 3kp 4 :wqr6votjxj;x5here B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod chargebdi 8,t1a*fek an electroscope positively?

  An originally neutral electroscope is bntr pour90e-tl e99*uriefly touched with a positively charged glass rod. The elenepl9ot09u- utr*9 erctroscope

  An originally neutral electroscope is grounded briefly ww aqz 07lrh3b-hile a positively charged glaab 0l73 zwq-hrss rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. The n(6ke0w t2cgjn a negative object is brought near the electrosc nget 2(wc0kj6ope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatedh;tv d:d .x0ey.tg u0s table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neut;.sx :ugt h0 dde.tyv0ral 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. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units o m03l)dqefpg) f the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance on:ut c0d70/+qg g wn)vvrtsn4 q2 y4dd. The first charge is larger in magnitude than the secon0qgs0v rq/t n +utdv:c2dng7 y4 )o4wnd charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed 4bcbn2xh0k9wmsl +6x near each oth wh6cl2+nbxx9 s4 b0mker on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a cri fmn kc)nbpk(;6.3qertain force. If the charges on both objects are doubled with no change in sepn)3kbm;. c6 qi(f rpknaration, the force between them

  Two charges are separated by a distance d and exert mutualr5 3;n4 nbb3geekjut6 attractive forces of F on each other. If the charges are separated by a ;g3kbrebnjnt5eu6 34 distance of d/3, what are the new mutual forces?

  Two charged objects j- ycz .6ty*bulo-jq7 attract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separati- lj 7t* z.yb6ouyq-cjon 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 oj+: sb2tvuca kp9el 0+8i oy 2pdz+/wzf 1.0 m. What happens to the magnitude of the force on thuzw+0 2z plj 8edy avc2s9/+bpi:ko+te proton if a second electron is placed next to the first electron?

  An electron and a proton are separy vqhzg k8748oated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a seco8kqovzyg4h 87 nd electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. q t--pe).sx pv4kos (t What happens to the size of the force on the proton if thevk --q )txs(e.spopt4 electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placedgk54o (d3ly y/cjyi;b at the center of a square. 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 at the other three corners of the square. What is the magnitude of the net electrostatic force acting on the positive chdjik ;yo5 l/gcby( y43arge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle*5fmlemoq um( 9 m5lotz)m s*:. 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 t(osl9q)mm um5t m*5*floe: mz he 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 not a vec+guqeq 8- r)j dqdfy.dk;. o6ztor?

  At twice the distance from a point charge, the strength of tf:/)q0sxlr93.lit y,fl niaxhe electric field

  Is it possible to have a zero electric field value bet17qoo ;7:l xunnx3avhween a negative and positive charge along the line joining the twuv x xa3o:n17o7lqn; ho charges?

  Is it possible to have a zero electric field value between two positive charges g+ t94ewik)*y;fi qfe along the line joining the twf +qt*f geikewy;i 4)9o charges?

  Electric field lines near psitive poimz16;xdgg*rn-91hh/a vu f x pnt charges

  The electric field shown i*u 9 -a0grzh( rw-mdwsm+u*m

  Can electric field lines intlmhhfoc 1wm-vg(97zf , 1jcmsa+1 l+ kersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform swqksm. t (1a5electric field. Give a statement concerning the electric field in the block's intewqk t(s1sam.5rior.

  If a solid metal sphere and a hollow metal sp;wt2 :s)kyarhk- 4jceulph- 3here of equal diameters are each given the same c h2klap-:jske-c4hy3u;wt ) rharge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminumf-k8pztp +rz.4q ,ccp rests on a wooden table in a region where a uniform electric 8ztp4,p- c+.q ckpzfr field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nwhxai -l- r.5tear an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is f*stn-p :2la3h j0oo fgrounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has p*toj :-3l0ofn afh2s

State three properties of conductors in static equilibrr4 cnhg..b jll1 ;tgl/ium.

State Gauss's law.

  The charge carried by one electron i- jaox01. 1r r(- bserijbsy-cs $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net char)zbrjq w9 -vaim6ymz 4q:)hh.ge of +2.00 mC. How many more protons than electrons does this piece owq mh9v:hqjzm4z-)r. y)6iabf plastic have?

  What is the charge on 1 kg of protts7ee7j m7ttgk 2,r(v ons?

  An atomic nucleus has a zh83b fe1ct9 nyfhztz /5.xe8charge 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 vah; i8vl(mg h3:o irngg .fh6we/ i):xylues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between the(fyiv:6g3hxn:iho/h 8gm; )g wr l .iem?

  A 1.0-C charge is 15 m from as9kj f19 vy*wi ,t+dxl second charge, and the force between them is 1.0 N. What is the magnit1 jw+tvix*l, 99fd skyude of the second charge?

  Two 1.0-C charges havl2 i;gogw w,rq)q-9tbe a force between them of 1.0 N. How far apart are they?

  The force between a (f; l1dt5 tcqrbs/0zbx++kks $30 \; mC$ 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.* zbc* cqms18v If they are moved to a new separation of 8.0 cm, what is the electric force between t z*8bqm*vc1 cshem?

  Three identical point charges of 2.0 mC are placed on the x-axisa9. rmd i(fdn1. The first charge is at the origin, the second tm9add( i1nfr. o 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. h+8z.fydk l+ oii0x- n 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 elect+n8i.h0 f-ol x+ kzdiyrostatic force which acts on the charge at the origin?

  Three point charges are located at the followy y60gfqhx2 g2*lrrm. wqc2;oing positions: 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. Whry r2.wxg;cfhg2 m6q*2o0yq lat 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 secopc cl5mbs* t(3nd 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 thatpcsl*3tb(m c 5 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 nygs3p3vwgv 8 j)1am oay9of(*C is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of tf)joy vgap *3oa v( 8s3wy19mghe net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at 8he +2z0w q4*o t)jjtgrbhh0g(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chargeb)o0q0etjhgrw2 h8*g+ ztj4 h?

  Three identical charges of 3.0 mC are placed at the vertices of an er-byq:u*bu *ab*osl 6quilateral triangle which measures 30 cm os q:b *oa*ruulb6-* ybn a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +zll1z 5,skx z sa(i e .wj/ qrolnti7g7e84*1d4Q, which are separated 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 electro 8k1ax*oegl/zl75 i tdlsjzzn.q wis471e(, rstatic 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 = )ytec.k5nyxw4 iv/ p (4.0 m. Where on the x-axis can a third charge beyc4vnei/tx ( )w .k5yp placed so the net force on it is zero?

  Charge +2q is placed at th-2sgvrbvu- +e3e2z02hxyqiq e origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placez2s h3bgvx02 2qyur-v +iee-q d so that the force on it is zero?

  A copper penny has a mass of 3+hriqlnh2 ; br)( fjf-u1ukf1.0 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 force of gravity by the attractiou7r03ohpv nl7r/ st/ qg:h)r(wp 3yrd.lq s7on of a fixed prot7l:ory ro(/.0hqqsp rg vud3 ) npl77 rht/s3won some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are8:9be*.:tf1 haiaihfr fx kp; hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the elec;rxib: f1*hthif:pak9. fea8 trostatic 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 kmi9 ;8cnnp pn3e x9xt4p04 e2 qllrq,is the magnitude of the electric field at a distance of 1.0 m from thelqpc4rn2 8k90e q x n3 4;9mtxiplenp, nucleus?

  What are the magnitude and direction of the electr-5u7.ow ncpsric field at a distance of 1.50 p- r.s5 uncw7om from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnith- fca.( wvh17,hvijsude of the electric field at the location of the t(jw7cva,hhv-1 sf .hiest charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the-il2e gxk015 mqzu rc4 electricu l5-kxqe 4z0i1rcmg 2 field?

  A 5.0-C charge is 10 m from a small test charge. What is the mag ebyg4h*ge0,e nitude of the force experienced by a 1.0 nC charge placed at the location of the test charge?gg,*heybee 40

  Two point charges each have a value of 3.0 C and are separated by a dis2p )hrguxn*trv g)a-7 tance of 4.0 m. What is the electric ftrnarg)7)h* v up2gx -ield at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and+bn 7uel(saj) a -4.0 mC charge is placed at the 50 cm mark. Whatl bnase) u7j+( is the electric field at the 30 cm mark?

  A 5.0-mC charge is placeci)cr/qh71 * udqb +bsd at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is thc*/7 )q+shbq i1dbur ce electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at q9ur3d jbb6fuog*.n4 x = 0 and x = 0.20 m. What is the magnitude of 94ngf63.o jqu*dburb the electric field at the point midway between them?

  Three 3.0 mC charges are at the threqd48r 8v3n mlex4k6 6 pvyky3le corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cente3 l4 rml88qv6ykx6vd34pyn ker of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corn cj8xj8mqo5o )ers of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1 j 8jmqxoco5)8); +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 -g5: a7n dk3be ; kac/pzk(n)syoq ommz3u-u5placed in a uniform electric field. What is the magn3m -nea bnk;kz)kuq:m5zs-5 apuy c/odgo(3 7itude of this electric field?

  A particle with a charge of wkun/ucy;(35nul d, v4.0 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 mff,8 fcx6g j1qass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to f,fjg18f6xcq be suspended?

  A foam ball of mass 0.150 g carries a charge of -q 0hk*w jyl wo99)xb,q2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the fbk*x9wl)q0q9oh, jy w orce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of ra ggsb )9k)c5ra:y xuz8dius 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's sur zb5rxgc8y ks:) g)a9uface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. )3u-qp4vb a5d 3pedmm What is the electricv5 p-d 3p4mdbqu)3eam field 6.0 cm from the center of the sphere?