State the law of cons75wec,2m u -qvhjqn:q;9q s haervation of electric charge.

  Is it possible for two negative char8td myw)7 .agtmy;er*afc8i9 ges to attract each other?

  Is it possible for a positive and a negative charge nozh u2 h8i;8oll,(ko to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod 1zudy3j s d7b9acquires a positive charge and the si 9y31 dzd7sujblk

  A proton carries a

  The model of the atomdj kg89dedzc q.,j/hy6bb:t6o) c8 bw shows a

  A neutral atom always haln/ g8 eelt8aq7he y0.s

  An atom has more ele1m/lr y8m9 dd. *kftmpctrons than protons. The atom is

  Materials in which the electrons are bound very s1:66ez0pnptr r zix, tightly to the nuclei are referred to as i srp exzr1p,t6zn0:6

  Materials in which the electrons are bound very *phd *7nmcrjx4s zlf5jfo-3df *v: h8loosely to the nuclei and can move about freely witx4 nf-p h*v 3jfs*ch 75lfdzdjomr *:8hin the material are referred to as

  A negatively charged rod is brought near one end of ab7 6:j04*stx8 zczv-v zpwvpb n uncharged metal bar. The end of the metal bar farthest f6zbjb*tcv : v8p-z x7pv4w0zsrom the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B z vwg;(sf )jzz7-nw(xis neutral. They are placed near each othew7v ; f(xzgs jw-zz)(nr on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscopqk; 2uw 7 ncl8ci-f 0wocz:)hflj2;ioe positively?

  An originally neutral electroscope is briefly touched with a positively cht*rhe0p6q* 3( ypnoajtq l6 9.oovr-t arged glas*tqp 0-r9q6or*a.3e l6p(tynhov ojt s rod. The electroscope

  An originally neutral electro/gmeze gs(1v,uvzwujo ;+ r*9scope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electrovog*/ew,u rumz +;zs 9(1jgve scope

  A positive object touches a neutral electroscope, and the leaves sedos qdznkc5q6*9:jz3k 9px9 oparate. Then a negative object is broqpd3cq9nkx*j9o 5z9ko z6sd: ught near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chargedx7n dlkfx,xr4 8c 3bd+;8qjet object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it tocx8+j;7xdbl,d xte 4q38nkfr uches 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 conw8u9jyfydl*5/g*r8vzy cvj( 68 cjp gstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is m6)8m aqxre w2larger in magnitude than the seconr 8m2)x6mea qwd charge.

  Sphere A carries a net charge and sphere B is neutral. Theq t k ul00qck+l8wuh56y are placed near each other on an insulated table. Which statement best dwklqu50c+u 8kq l0t6hescribes the electrostatic force between them?

  Two charged objects attract each other witwrm4 .-g+c p bdkl dkbutu1 /:v)66fibh a certain force. If the charges on both objects are doubled with no change in separation, the force bet lu:d +)kvb-p .imguw crb 4f6b6td/k1ween them

  Two charges are separated by a distance d and exer8iww2h )tv ps2tl+.-g fh y:wrt mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, wha+lhw8)rw2iy:.ftws2h gvp t- t are the new mutual forces?

  Two charged objects attract each/qv/w+law( -cd0lh9 :6a3x i:fi sbl h oxlyk7 other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is:d 6+wv/7b3- iwiyh q l( a/09hoskaclxxfll: reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m.g1 *u.krfm.kx What happens to the magnitude of the force on the proton if a second electron is placed next to the 1r k.xf *m.kgufirst electron?

  An electron and a proton azpz-j ntlp,7guq* 3 )yre separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second elec- jnzp3)ypt,g* l 7uzqtron is placed next to the proton?

  An electron and a proton are separated by a distance of 1l 3svohm;j p.u+k2k8e.0 m. What happens to the size of the force on the proton if the electron is mo32vej m.k l;khp 8+ousved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poi .+oxir rymr9:f:9ksvnt charge of -Q is placed at one of the square's corners, it is observed t9:mx rr.9 rkv+syi fo:hat 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 t: -hryw 9pccnrx(x,0ghe centroid of an equilateral 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 th 9c:x,ry(w-0n pgrhxce force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followi lrb(9 d,kqk6ing is not a vector?

  At twice the distance from a point cha; +be*y:6)ujbk3emhkdqdcl ( rge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative an 4pjd,zz-hr j(k6emy 3d positive e j rzd z3kyh(jm4p6,-charge along the line joining the two charges?

  Is it possible to have a zero electric field value khx+ x: atm4sw+0w4 apbetween two positive charges aa xmk s0w+h:+twa4px4 long the line joining the two charges?

  Electric field lines near psitive poinv6r-bg4 x qln*t charges

  The electric field shl+gmd/wqiuz 9:sv( kz ,j9)xlown

  Can electric field lines inqta(s ;;pl 8sqd/e8v h5dt ;natersect in free space?

  A solid block of metal in electrosta)dk )abqm vpyfr)8+ 6xtic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's inv 6)+ )8k pr)fmxqdyabterior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eai7zkt*m 4 a+wwch given the same charge, the electric field (E) midway between the center *wmi kwaz47+tand the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform eyiti0me ut 13+lectric field is directed straight upward. What can be said concerni0+iuty1t m3eing the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electc n4b15mp.if a75xcfzric charge

  A positive point charge is enclosed in a hollow metallic sphere 8 (skz ,gs10easvvsc y4 g14bvthat is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the ss,vscg b ys81 4ekv4gv1( 0zahollow sphere has

State three properties of conductors in static equilib0u)s9 npxyxl-2;pgzu4 k )wwr 21b kqzrium.

State Gauss's law.

  The charge carried by one electron is eqwlyf6z yp+er2 m1+/ $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2.35 trdwjkapu0o 1s0(u00 mC. How many more protons than electrons does this 0otuau0s 31w(kprj5 dpiece of plastic have?

  What is the charge on 1 kg of 4 pc4m 89jc b-h b+ ixz.zpdr-xygjj+)protons?

  An atomic nucleus has a charge e.-b 3 eba z552folnvqyp 80urof $+40e$. 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 m0c3ru1* ak ehmC, respectively. What3m h*uk r01eac is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the f/ *( img,ez,ihp9b p e9ma*vmyorce between them is 1.0 N. What is tvme( /pai zm y,b9g**pmh9ei,he magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 s2oh)u:-xkg m ,o;,:swkdw niN. How far apart are they?

  The force between a hhvyhkq/ (p ec o.8;otq: k4o2$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm cq w8rdqm2)v 9+kx9jh apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force betwjvh8q mqx9w) crd29 k+een them?

  Three identical point charges of 2. w- ef8l3hjek6a;io a;48p4 pw2crxid 0 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. fewd2o i4l xh34jw8;ki6e- ;appc a r8 What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are ikizq ,/p4 qv p-aslig e)95-hplaced on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50qiez,k /)hi v5-4qasp9-lg ip 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: Q1eol (opie wr fi1/910w = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC ro1lii9f(op w10 ew/ eat 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 ceng/6*4roq +wyr6k+ hf q,acno bter of a square, and a second point charge of -Q is placed at the upper-o obfcr/6yk * 6+,agqqhrw+n4left 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 qgpfs+1y 3yzu ,my3wtw,7/r kn-z 0k w= -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on ttn r3 w y7k1 fp,y+zs-3y0zw/kmquwg ,he 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5. g:emh)x4:dp: vn1a:*qr qlvj0 nC is at (0, 0). W:rqp e *m:d:h1j n)x4vg: vaqlhat is the direction of the net force on the 5.0 nC charge?

  Three identical charge9t1vajr k73tn y6 erv47wr( fls of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on ay ewjv7r(r 69tf43 lrtk1vn7a side. 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 separw p;c2pvj:;/rhfzlr )ated by 3.0 m. At what point, on a line between the two charges, would it be possi;:zlfp j;/)crhpwvr 2 ble to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is )s3zocju1l xvbekgd9(/r)p8 at x = 4.0 m. Where on the x-axis can a third charge be placed so the net fo8gl()j 9z31pbr u/kecxs ov )drce on it is zero?

  Charge +2q is placed at t3k ksf by-fs-u g8j51phe origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force ouy-s -g5j bfs31 kkp8fn it is zero?

  A copper penny has a mass of 3.0 g. A totallbl. 5r0cpo9t 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 attractionkxd.y;c vy c4; s4uc4d of a fixed protky.xc v c4cd44;;u ydson some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonc c d4kw0cnb(o-onducting threads which are 3(4c dn o-wck0b0 cm long. Both are given identical charges, 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 magnitude of the ellcnu3m3 ny: u9ectric field at a distmc9 u u:l3nyn3ance of 1.0 m from the nucleus?

  What are the magnitude and direction o75 b)1:hst4xjw tkiydf the electric field at a distance of 1.50 m from a jwd7:i h1ys txkt5)4b50.0-nC charge?

  A 5.0-C charge is 10 m from a small test cht ;m9yst 9y2/kcr)m baarge. What is the magnitude of the electric field at the lo)9syt r/ a2;ytcbkm9 mcation of the test charge?

  A 5.0-C charge is 10 m from a small test ch6 widbk +vzw16;2na0m-rd yysarge. What is the direction of the electric fieldkanwdd6 w -yy vbm0s21zr;+i6?

  A 5.0-C charge is 10 m from a small tescn5ry pfo948 80; vf:mcr qavkt charge. What is the magnitude of the force experiencedpv;:958vrfqc4cm o0 knf8ray by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value ofv+h mu5vze+m( 3.0 C and are separated by a distance of 4.0 m. What +ehmm+v(zu 5v is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stic(x f lh7wtq;p;1e pa2u1t sww*k and a -4.0 mC charge is placed at the 50 cm mark. What is the elt(psfx1pw; 17te;ul2wa hqw* ectric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 o1drd 7,p/c xrmC charge is placed at thepd/ox r7,rd 1c 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placmp5 qjx m(9: cpk:9rj+ hwn0kged at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between the5mj hp9+n:jkk 0c: q gw(9rmpxm?

  Three 3.0 mC charges are at the three corners of artk0v4 thq wnn k2;uzat*7f:) square of side 0.50 m. The last corner is occupit*0kvnnqfht2kw:; 4uaz 7r )ted by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Cha2vw vz lq9;a9frges are placed at the corners of the square as follzl9wq;av9 2vfows: +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 electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a 3r(w9 nj xxa7o5:cbmj9u;lubuniform electri7c buo5mxwxl9j39n; :ba r( ujc field. What is the magnitude of this electric field?

  A particle with a charge kzbl6h;tue s2x:xr 2 :of 4.0 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 mass 0.120 g is placed in an electric field fah9p4esn p g77h5zu 0of 6000 N/C pointing downward. What chah7sfp ga e90pz47uh5nrge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.0zf92og9qp7e6ve lb0r0 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude vglo re e 60p79bzfq29and direction of the electric field?

  A metal sphere of radius 10 cm carries a *1f -jrawx jctjl.q23+z26 fvpi ;nqicharge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sph2f6qw23jp jr -+f;n1 tqc*j viza.ixlere's surface?

  A metal sphere of radius 2.0 cm carri6uuon . f0iuc*z e).8yl9imcarjv1.d es a charge of 3.0 mC. What is the electric field 6.0y )0fu cuimo19jz8 *d.a.l u6cievn.r cm from the center of the sphere?