State the law of conservck3pf+ g+iwp /q--+klq rd(lxation of electric charge.

  Is it possible for two negative ch dpc67iig jw:q )m*ie-arges to attract each other?

  Is it possible for a/2-xdl 14 xwi;qy6x5 vjgoivd positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of nq lnhe4(j0-qsilk. During the process the glass rod acquires a posnhn (q -jl40qeitive charge and the silk

  A proton carries a

  The model of the atom vya7gnay 51pxnv;i h u5/+:iz shows a

  A neutral atom always hax,it3 1f wpectrdzau m5*;n +x06 +nuls

  An atom has more electrons than protons. 9hebxs-vi1xjf f9g )*rsus0i(bc*c 0kd v 3, d The atom is

  Materials in which the electrons are bound very tightly to the nucl kxkvyh bd+r0:; (1sxoei are referred to asbx;k1 xkdsr:vo0 (+hy

  Materials in which the electrons are bound very loosely to thcv).uwplxd / ; i*atyf*7y7)s 6ncmwae nuclei and can move about freely within the material are referynt afv6iw p)dml) u;**c 77yaxcws./red to as

  A negatively charged rod is brought near one end of an uncharged fo)y z5y::(xmao 7zlvmetal bar. The end of the metal bar farthesz7(oz)m a o:5xylyfv:t from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere br6vx8pxw98(g5y qw0 f jzy s0B is neutral. They are placer80sv06z5p xb gqyf(j w9xwy8d near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargx:*l0 m(cndzaed rod charge an electroscope positively?

  An originally neutral electroscope is briefly toucxx+5r;7;f kuknk aiz+kip,/ phed with a positively charged glass rod.n +;px,;p i7/k+ziakurk5x f k The electroscope

  An originally neutral electroscope is grounded briefly while x v5skz33gy.,l p5d0idpbz e0a positively charged glass rod is held v0z 3lp xeyi3b05,gzs5p.dkd near it. After the glass rod is removed, the electroscope

  A positive object touch9k 1h3mxlj(i zes a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touc3lm9kzx hij(1h it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral m+1iz6 b)p* uwvs2r9c-v z+xt djf0f vfetallic 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 +s vi1x0 dpzt6bv+fcvjw*fr-9) u2fznot 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 cogx7 rnu/1nm .unstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargz s y pmom9cf/n2 +bx55mz22ioe is larger in magnitude thanb zf 9o5cxymm+5n 22i2pzmos/ the second charge.

  Sphere A carries a net charge and sphere B isr0bt 2k trs)y0 5oot8w neutral. They are placed near each other on an insulated table. Which sta2boy0r 5kw)t8otrst 0tement best describes the electrostatic force between them?

  Two charged objects attracujxs.vbluy h m(eh: fp :246l-t each other with a certain force. If the charges on both objects are doubled with no change in separation, the force .xu (ys- :h6f42 :lv ulpbmhjebetween them

  Two charges are separatr4jd + wp4g zo34,gmpred by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a dis4 ow4r4+mzg,p gdrpj3 tance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happeg3 vm +:w+ i3:bnw)9xxcrzgyy ns to the force between them if one charge is dr)3gvnx w+9ygzi3 y +wmc::xboubled, 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 separated by a distance of 1.0 m. Whaby p*hg)4 n12(tlxhmk; uddv1 t happens to the magnitude of th1)h (gplx1 ybuv2 h4md*tn;k de force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distvry2/q; tn(i uzp x:xvy.k3n+ ance of 1.0 m. What happens to the ;/y( x: qr3vtuikyn+.pn2v zx magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happenstgg7)2 wr* pxd to the size of the force on the proton if the electron*rd7w g)pg2 tx is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a sqr9 )p8/z nuhnsuare. 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 ofznp/n ru)h8s9 -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 t, 2 2s5jhjh,wht,vaq/sa pfj5*e:zx,pgb p5is placed at the 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 the force that acts on the center charge due to a third chajjvzbhg qtfwh ,:a,,5p/s2 5 a5epjh,x2 *sptrge of +Q placed at one of the other vertices?

  Which of the following is notup5/wa- dny3i a vector?

  At twice the distance from a point charge, the strength of the electrmx2kolm r x-24ic field

  Is it possible to have a zers./zjvg:laa q0 idtv ee)1 43wo electric field value between a negative and positive chate ) . slwj1 qi/a0vvgze3a4d:rge along the line joining the two charges?

  Is it possible to have*f wh(7p+mo vp a zero electric field value between two positive charges along the line mpfho*7p(wv+ joining the two charges?

  Electric field lines near psitive point chah2 d j*ywrthx1.,9d)fh n gl-irges

  The electric field shof+dpx y/l 8xx6wn

  Can electric field lines inte)ei5cdo+ bzr4q+q ) anrsect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uni: d4 g9 j;edmna)nxw,hr8qi 3nform electric field. Give a statement concerning the electric field in the block's )e3nmd 4 gqax: ,rd j8hni;nw9interior.

  If a solid metal spher iwh- l(fz10 ;)tlq nz*gozm5x)tn r3re and a hollow metal sphere of equal diameters are each give)lz r (ng h)*wm0zz 3q-5ltonxfti1r; n the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wbr/ ( r:4mo6 bv,2zfh9 m.fjs x3lybusx8 rfk1ooden table in a region where a uniform electf6l849(r f x zf vmxbh1/jor,bmsr2:usy .3kbric 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 near an elesu0du ui5h vu-jy jr*k9h60u-(v lw/qctric charge

  A positive point charge is enclosed in a hollow metal6+909ryr)lnj 4tecf n jznd)m 5axxa)lic sphere that is grounded. rn))an5c)+y zxx 6d0nrm tjef99lj4a As compared 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 equix4k-i nm)rlgjh y )qpw6 ro49q)ww7z 3librium.

State Gauss's law.

  The charge carried by one elicjxbm2 rz2 99ectron 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 cha p)sfxi 15x hg;gg;z9qrge of +2.00 mC. How many more protons than electrons does this piec;iz 9 s);gx5 xqghpf1ge of plastic have?

  What is the charge on 1 kg of protm )rjorx /)fe.ons?

  An atomic nucleus has a+no8h *yi6yb :rt-l sl charge 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 values of 2.0 and -4.0 mC, ro q ps4uv9c9z9-xqhe-espectively. What is the magnitude of the electric force betwehs qcx -up49oe z-v9q9en them?

  A 1.0-C charge is 15 m from a second charge, and the forc,5o32f2 z91q usurgvknez b -i,ppg.ge between them is 1.0 N. What is ug213,o9gbipzgrzq- .kpv2n 5 ues f,the magnitude of the second charge?

  Two 1.0-C charges hamxxbo*d 6y6er(ozm0) ve a force between them of 1.0 N. How far apart are they?

  The force between a mptotv7oa)y 95ww ;1z $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, eq;*d, q1pgkhr- 09)c q i1pd7 pugjjiexperience a 1.0-N force. If they are moved to a new separatiojg,)h-1;rd9qg*k qpj ic0peqidup 7 1n 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 first ch w+*cc s9hjzmhny .dz4 n3g(mpgmj) 04arge 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 which acts on the charge .)pwmhgm4 zznn3s cyhc9j jm g*(04+d at the origin?

  Three point charges are placed on4v qz 0p kvx5yghev**1 the x-axis. A charge of +2.0 mC is placed at the origin, -2.4 p0gv1hx*v k 5eyvq*z0 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 = 2.00 mC at6.:y0mqd tbop/icekvft/1o 6 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 force onbpvdf0.1tcmik/ q/: o 66oety the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second poi) e*.sskew wegu9f/*snt charge of -Q is placed*.*u ss)ew/ 9ewfsgk e 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 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 n1q1dfv rd + oa,(1k2pup otha-g(dsx,C is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magni2(v,ag d1d-p+xpfd r11o k,qost(au h tude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); -* . 1gjkpeocqQ3 = 5.0 nC is at (0, 0). What is the direction qk.c*-pj e1goof the net force on the 5.0 nC charge?

  Three identical charges of 3ts:/a, twj (by.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any on,bw (a/yt: jtse of the charges?

  Consider point charges of +Q and +) xp i gf62wtjmw))lo.4Q, which are separated by 3.0 m. At what point, on a line between))mg 2w6.i jowptlf)x the two charges, would it be possible 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 at x emf; .:x 79a:ljmlfnr jk;i 7v= 4.0 m. Where on the x-axis can a third charge be placed so th l en9x afj.ifr;:mm7v;k:7jle net force on it is zero?

  Charge +2q is placed at the origin and charge 1l u 20:)7 flyzyj/f yashox7c-q is placed at x = 2a. Where can a third positive charge +q be placed so that /f1fxo c0 layj)u7:h7sy2yz lthe force on it is zero?

  A copper penny has a mass of 3.0 g. e wtw7zko zl*9c /8a2zA 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 attractio3z4shiln 65fbn of a fixed proton some distance above it. How far above the ele s3n6b54lh izfctron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting tqv.x27u s-e y(88m sixg) zkalhreads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between tyk-8xzi8.au)q(xs2g mse 7l v he threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magtxlok:e q3ghx 56+4x mnitude of the electric field at a distance of 1.0 m fromm6:eo 5 lhx tkxx3q+4g the nucleus?

  What are the magnitude and diri d l6r0n.mc4qection of the electric field at a distance of 1.50 m from a6cq 4mn.lr0 di 50.0-nC charge?

  A 5.0-C charge is 10 m from a smal9n3datikc11 y k( (smnl test charge. What is the magnitude of the electric field at the location of the test ch1s9nkiy3km ( tnd(c1 aarge?

  A 5.0-C charge is 10 m frdz(-+eaf 0f fqom a small test charge. What is the direction of the electric fiele-(q+fd faf0z d?

  A 5.0-C charge is 10 m from a small testde8 v68*;u q3nvzig:fn,dhkx charge. What is the magnitude of the force expek38zgde hnq:xn i6 v8fv*;d,u rienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a diliskj20 :;o e)1 rz/uinmx e.pstance of 4.0 m. What is the elecu2 1p/ ezl;:im s.r)xk o0enjitric field 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 a -4.0 mC n:ql0:cwh;)/xdpz ( rm 7ehbhcharge is placed at the 50 cm mark. What is the electric field at the phzm enr/h :()0q7d l w;hx:bc30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter.-;ix0sh, g se81rygidx;s smbo9tx / stick and a -4.0 mC charge is placed at the 50 cm marir, dbyo ms0/g-1;xhsgs x;9 eit.s8xk. 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 placed at x = 0 and x =2masm ;e-vt;y:wyye; 0.20 m. What is the magnitude of the electr-;mv s2a;mye;eyt: yw ic field at the point midway between them?

  Three 3.0 mC charges are at the t,j7ho /t* yycyrp.8t uhree 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 cenr ,8yp./*y ctouhyjt 7ter of the square.

  Consider a square which is 1.0 m on a side.dsv(23lw-*7 lyxi h mi Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +himwsiy3*l lxv-7 d(24.0 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 placecffbge )cr*; 6d in a uniform electric field. What is the magnitude of 6 rgef)*;cfbc this electric field?

  A particle with a charge(;ide3v ft52wffeq*ykib -c nok 51,p 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 pl0cta22 ymf p th;:vo8o+e:tqh b18xye 7tr0sdaced in an electric field of 6000 N/C pointing downwaeotc8h01 ;tqv:br2 7f yep028myotdx:h + s tard. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g/jsti- 3) 8pqg5via ap carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of )tq- j3s8pi5 /gvp iaagravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mns2t2dm :jm.ss.c6zl C. What is the magnitude of the electric field 5.0 cm from the sphere's surfa j:t.z2ss2l 6mncm. dsce?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elect: -pw ;iwhuup5rd;.)e mm0 tjmric field 6.0 cm frp: thp5mw;-weudu 0 mi.);jrmom the center of the sphere?