State the law of cons0k 3dzqa +ymn4w4vhy) ervation of electric charge.

  Is it possible for two negatawu7,qb d y.m8ive charges to attract each other?

  Is it possible for a positive and a negative charge tpf y;2vh)3y3 cb/rl lxo attract each other?

  A glass rod is rubbed with a piece of silk. zljv9dfnb3 pv.0; j4 k During the process the glass rod acquires a.bl v0jp j n4k;fvz93d positive charge and the silk

  A proton carries a

  The model of the atom s4k.*ux l3ds*z oljg- jhows a

  A neutral atom alway;,gmx ny6vwl ci8w8z/ h y5;brs has

  An atom has more electrons than protons. The atom ,t*y,wqfxsg my br(. 1is

  Materials in which the elekr5g;awfpki7. f ;ua 6p po3n)ctrons are bound very tightly to the nuclei are referred to f k6. a5 )fkiwrpp;7gnu3ap;o as

  Materials in which ta( w x-qrjnk-hh ef)4c *k+dp5he electrons are bound very loosely to the nuclei and can move about freely within the material are referred to +ncp jqr4dxh5ka * )wf-h-ek( as

  A negatively charged rod is brought near one end*xtnq (d+4hx6el w (y.m;tecj of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be cha6m;t(4jytqe*.xh(n xl+d cewrged

  Sphere A carries a net positive charge, and sphere B is neutral. They are platxb+ v 4 c*.wj;oydrs2ced near each other on an insulated table. Sphere B is briefly touched with a y ;d .vr4b 2+c*xosjwtwire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope posit1i.lc z:zi jz6om)zy 8ively?

  An originally neutral electroscope is briefly touched with a positively cvio)x1m a7 s.yq8y 8hfharged glass rod. The el1fy) 8asmyi qhxo87.v ectroscope

  An originally neutral e:4wcjsb1zlc 4: z,bfqlectroscope is grounded briefly while a positively charged glass rod is cs41j4:b f: qlc,zwbzheld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and th)ywe pln 1j7a.e leaves separate. Then a negative objec ej.l7 wy)pan1t is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. pnvc+bf1pl14k uqv b8:nih8l 6 9u y7hA neutral metallic ball rolls slpn7q6y8+vl11 ifb ub p9uckh4h v :n8traight 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. 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 constan*kjor* xg6pd,pe g7j n24s6ah ;8zwqnt $k$, which appears in Coulomb's law?

  Two charged objects are separa .tgm5y5 z6(krugr1 zfted by a distance d. The first charge is larger in magnitude than the secondfu5 gygzz5r.t1r(m6k charge.

  Sphere A carries a newmtmus19 i yu9m 7qd0*t charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between t t9m m syd*790uqm1iuwhem?

  Two charged objects attract each other with a certain force. 0 c pvl9,pwfh-(hy4s g If the charges on both objects are doubled with no change in separation, tghvl-,y hs0 cw(9 ppf4he force between them

  Two charges are separated by a distancev6s9gyj zx58ls8 r/aca) x;dy d and exert mutual attractive forces of F on each other. If the charges are separated by a zy r68yj xcsvsag)/xd5l8 ;9adistance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What 6i9qptsmh :5)6yiyd4lbv 2mchappens to the force between them if one charge is doubled, the othe6)m5hdctmil6i42sqy :by 9v pr 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 aref4wsdo)1lf y/ separated by a distance of 1.0 m. What happens to the ml4sd yo) /wff1agnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separatelk :9(caf z8sld by a distance of 1.0 m. What happens to the magnitude of sl:9a8 lfk(czthe force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a dicq3l5qo ftc9yi ep6 3jf75 zj:nep0 3fstance of 1.0 m. What happens to the size of the force on tff9 6ot 7y:5qcef p5c0j3ij3l 3eq nzphe proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a yk qrr1v,pmi .8m(kjuh* o*( lsquare. 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 electrost*rlq*1y rjmkvk.up h ,(im(8o atic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an eo*6of/,s lnbmhyqa )7quilateral 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 7fm*by hl6q ns)o/oa,charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following isil fd+hiy,(93hxlgy + not a vector?

  At twice the distance from a point cj-:qwr - 6pvgbharge, the strength of the electric field

  Is it possible to have a zero electric field value between a negatik t-p nf0/84o4a -dqpzif yu(ghrnav/84 l+ jmve and positive charge along the line joind h44q z8/8rf+if m a o0yv-j4-gaup (p/knltning the two charges?

  Is it possible to have a zero electric field value between t-z f a6j,4 ky6msgbhpg3x)l4 lwo positive charges along the line jo j4p6sh,gkzlxf3bm -46)l gya ining the two charges?

  Electric field lines near psitive povmfj4ps-- 7 8zfx l.hmw 6fmk6int charges

  The electric field showny/jafd6*edt -q41xdz6 yv(5z; jkj ft

  Can electric field lines intersect in free sp9um7qj zvid qh7 0pb86ace?

  A solid block of metal in electrosku +9, xw:hb6wbe5 b1v0u opcltatic equilibrium is placed in a uniform electric field. Give a statk5ul 9c1+, wbh: ewbupox 6v0bement concerning the electric field in the block's interior.

  If a solid metal spheqhma4rm2dj8e c6r2u 6 re and a hollow metal sphere of equal diameters are each given the same charge, the electric fie824 dj r c66qu2mhmareld (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniformbj lfjsxqv3j.j(ff.,*q9n-m electric field is directed straight upwm.vq3j -j l.b(qff*fs9nx jj,ard. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an elect6.hh ku9vd1yp ric charge

  A positive point charge is enclosed in a hollow metallic sphei -d rjt-2et)vre that is grounded. As compared to the case without the hollow spher)je -tit2r-vd e, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilib+,i2lxlpa* hypd b8p0 rium.

State Gauss's law.

  The charge carried by one electronimq-d mqv; a/m 56j:t-3 wposn 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 chad7:4,g )b euqm 2vpsfe( o*dutrge of +2.00 mC. How many more protons than electrons do tmoufd:7e 4v,ed uspq2g)(b*es this piece of plastic have?

  What is the charge on 1 kg q(1gqy3a6gxkz-, bhd of protons?

  An atomic nucleus has a charge dw/l7 8)pjv(n1skqkpmn o9zff7-: ycof $+40e$. 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 and -4.0 fhfig xb-8+u +vg9 f9nmC, respectively. What is the magnitude of the electric force between 9b9+g nif8g ff h+uv-xthem?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1 ovf zk6- 86zetgww/t1n;xm ,z.0 N. What is the magnitude of;z6,t 1ko/ zxnz8fv-wtgw6 me the second charge?

  Two 1.0-C charges have a force bet,g7hyn;- hn yb/2zseeween them of 1.0 N. How far apart are they?

  The force between a 3 -ln7xl:g*p y:zmlpiux0e6q$30 \; mC$ 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 pbp/6ec x1,mb 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force6p/ecp b 1,xbm between them?

  Three identical point charges of 2.0lj3wc -nmd1jl))x 1nw mC are placed on the x-axis. The first charge 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 force l) xwlnjn1 3d1cj -mw)which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed atoxvwm3mm 3 82e 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 acts on the charge at the origi83mwom3vem x2n?

  Three point charges are ll:+qa7a s0s nfa 6 7n0tm-puxmocated at the following 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. What is the magnim7sa nxua+-n6 0a lps:7mtqf0tude of the force on the 3.00-mC charge?

  A point charge of +Q is plac*ttsbl7 sp(:c bba2/.9 mqgio ed at the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic m:ottb.si7a9/qs* cp(b glb2 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, 0.1p:3gs0hq ttz xo o 8xp)v9v;8k0 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on th;sq9t p 0 p zog)ot883:kvxxhve 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m9s4 /4bcnsb ivr+ iqx2); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC c4isiv/ x +qb49nrsc b2harge?

  Three identical charges of 3.0 mC are placed at thexoxk,v6br*f )b5 wdzdrsz +-4 vertices of an equilateral triangle which measures 30 cm on a sidvo-s5,dr)46bf+ w *bxzd k rzxe. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separsummzj y 8,+isvof0 50ated 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 thimjszv0 of yus5m+80,e electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a qeyer ((v yv8kzd-( 6p+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be edy8-(eq yzpr (kv(v6 placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge w - a0 hhpleb7gk7gqe69mx.uuan 52.e-q is placed at x = 2a. Where can a third positive charge +q be placed so that tu. kx75eeb9-n m0gpl gaeawq76u.2hhhe force on it is zero?

  A copper penny has a mass of 3.0 g. A total of :l*c*fkq6b 1v ms)uu i$4.0 \times 10^{12} \; electrons$ 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 forfam6pj*)i tj5ce of gravity by the attraction of a fixed proton some distance above it. How far above the electp6if5*m ) tjjaron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductin;tjjzby ux62745es 5esveuj/g threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is s4; ezvxb7s5 5uj/ e ej6ut2jy$20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. Whav8 g.j oa.d+ntt is the magnitude of the electric fi8nt+a gv.od .jeld at a distance of 1.0 m from the nucleus?

  What are the magnitude ani s 2i6-tr1e-aup0xjur 8gfr9 d direction of the electric field at a distance of 1.50 m 1 p9r-risagj-8 6r uf02x teiufrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the mag- yr*1j s2v+sdmkwt,pnitude of the electric fiel2skd-,svr pw 1*yj+tmd at the location of the test charge?

  A 5.0-C charge is 10 m fro zb(k11mby*u wm a small test charge. What is the direction of the ely wbmz ku1b(1*ectric field?

  A 5.0-C charge is 10 m from a small test charge.dp* (7bcylc* m lc-bx8 What is the magnitude of the force experienced by a 1.0 nC charge placed at the location ofylbc- (78*xcdc*lmbp the test charge?

  Two point charges each have a value of 3.0 C and are separate 6fclak0 47gqt os 0j8p6 0hvews3/sgid by a distance of 4.0 m. What is the electric field at a4 w03qje0t0kfs cgpss g/6o i8hva7 6l point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.06dgt)x:nfzcwom5u 7 ) mC charge iscu z g5 wfdn7)mot6):x placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is pla1zq.rmya +pv4ur* m10(c gwkf)z. gilced 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 linwm. qrgr+fa*) vzgu4yi 10m (z1lpc.ke joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mg wk(+m0 6p3on;ktv5gju;m v sC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway bem+j;ow6v n(v mgpsuk5k 3g;0ttween them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Tp(+u fu- kkf.-l-ptisfvxv2 :he last corner is occupied by a -3.0 mC charge. Find the electric field at the center of i(fxlfu-p --:+ktv pk sufv.2the square.

  Consider a square which is 1.0 m on a side. Charges are placed at n/l uot6p+*ki the corners of the square as follows: +4 o6ukti/ lp*+n.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 electric field at the square's center?

  A force of 10 N acts on a.828fz:nljzr rc( zqi charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this eqjr2lnzz r:fc(8 8iz .lectric field?

  A particle with a charge of 4.0 mC has a massqszensyqshqh)y ae-/nx 4)+ o /h f..2 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 electe5w u-n+ hd8r npr*a1 k4snjmz9t7e1f ric field of 6000 N/C pointing downward. What charge mus n1r7j+a19e rt*p-8ndh nfukmews45z t be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a )m/ k+bag5:i81pkc7 osgy xuk charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended a 57oi8u ykggxabsk/ )1: m+kcpgainst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mr;ll;j 7 hs.ppC. What is the magnitude of tphl ;rl; sp7j.he electric field 5.0 cm from the sphere's surface?

  A metal sphere of ragf me/cd1k nf gzp6f9pq2h).5dius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from thek5pefpnh9m2 g 1z6fd) fgqc ./ center of the sphere?