State the law of conservatio( u4ty gk9uxdtuo 9 2;+zm9pywarg 7i+n of electric charge.

  Is it possible for two negative charges to attract each othmud49(ntk4 oq z,o)kfer?

  Is it possible for a positive and a negative charge to at oyu 1:(y 7bfutf7vij9tract each other?

  A glass rod is rubbed with a piece of k5vedy(ee50r silk. During the process the glass rod acquires ade( k5eve50yr positive charge and the silk

  A proton carries a

  The model of the atom shows ao,r/ vo8rguny g6q n9:

  A neutral atom always hass4wzmoycp 5fp3 fv b ;u7 ,16v7vwceq8

  An atom has more electrons than protons(a5e,k(p hbrs. The atom is

  Materials in which the electrons are bs, k1mjvo3xqfp 1l rk0y xj*.,ound very tightly to the nuclei are referred to1pj1m*jxl .kx3vo sq 0ky,,rf as

  Materials in which the electrons are bound very loosely to the0o+l*ljpbt )z nuclei and can mol*pzlot )+bj0ve about freely within the material are referred to as

  A negatively charged rod is brought near one end of a f,kkcmja ))1fglcz(6n uncharged metal bar. The end of the metal bar farthest from the charged rod will be chargedc )ajl ,kcm1fg6)f(z k

  Sphere A carries a net positive charge, and sphere B is neutral. They are plac)k9*7w/*st k;wc vc ixdi:hs,vozc g/ ed near each other on an insulated table. z sgv/9wx wic,i/ c kvotsk:);dc*7h* Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargg+89qkglo:e g*g7 qdued rod charge an electroscope positively?

  An originally neutral electroscope is brieflyiqtb 8v 0gu*b)75 xnyn touched with a positively charged glass rod. Thb0ty n bngi)q85xu*v 7e electroscope

  An originally neutral electeucr01e5 r e;wmpmt+ 8roscope is grounded briefly while a positively charged glass ror5r m1um0c+ee; t 8ewpd is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. rtu ; tovuez(,b zk*8mnp/j 1jf+x(c) Then a negative obju/u,m+r)(p 1knv*z bc( xo;t8z fjjt eect is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatecn,.op nf nmu9,r:q 8ud 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. At no time does either ball touch the negative oonu.9, r8fmn,n cq:p ubject. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb dzn9s2kdj27i8 , jt , ock6qdmconstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firstv.f: -v,n:ilhl pvz*kozcq +yz ,q- s86lzcg* charge is larger in magnil, +*s,y l.nz gzoz:v l:fp c*vk6zc-qv8h-qitude than the second charge.

  Sphere A carries a net charge and sphere B i *x6-4/ r5//guhtiavmwe u6 :pfakjtes neutral. They are placed near each other on an iijetghkpeuw/a65*fx v:a u-r4t/ m6 /nsulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force.wzkwowq5 +:ohfr3 /d+ If the charges on both objects are doubled with no change in sepa+d3 kwohzroq +f:5ww /ration, the force between them

  Two charges are separated by a distance d and exert mutual vww.;a ynag/ n xc-6 dk+.1vudn: 6juyattractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutuv6;g xw1 /dynn+6n c:.wj-dyaaukv.ual forces?

  Two charged objects gv4geahq,:p ft y 09p8g xd-v0attract 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 separation distance between their centers qtyge0vvg0 p9 a8h gpx-f,: 4dis reduced to one-fourth its original value? The force is now equal to

  An electron and a proton 0 ms*u / 5l-tm8siezobare separated by a distance of 1.0 m. What happens to the magnitudso* 0te-/m5ublz m 8sie of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0m1qre,qn j,4p4nf /cg m. What happens to the magni4r4q,/mc 1qjfnegnp,tude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton a5eoqh *wcjs;6*kf e5dre separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved wq;ch6eks 5e 5dj fo**0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a d7 q +k5tobq6tsquare. When a second point charge of -Q is placed at one ok 6tq 5oqdt7+bf 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 charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. :d*thhqgr3r/ h* h 4jfWhen 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 thatdhh*qjr:g 3hf h4t /r* acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is dz xgn;(xn6j5m 70nom not a vector?

  At twice the distance from a point charge, the strength o )u1ia7bx:udmoalb*7 f the electric field

  Is it possible to have/ef8 9u/7d5-en y zk ; lpil14lagbjke a zero electric field value between a negative and positive charge along the line joinina iky4l7;ek/ b 9jpule5e1-znlg8 f/dg the two charges?

  Is it possible to have a zero electril-(28.+ d yan/ smcfz 4vtrhvkc field value between two positive charges along the line joining the two c-k/t l +vvsy nd(z8hc af.m42rharges?

  Electric field lines ae(7sd gt5mn ; r(jjvkk3js-6near psitive point charges

  The electric field shwz hf9x3opok1+a8 r(g own

  Can electric field lines intersect in free spacer+3t .fj pl3h*e;jezg?

  A solid block of metal in electrostatic equilibrium iswm3z. 1u+li(j il8ai .ip; pt,kdv v* 3p(qkie placed in a uniform electric3(kuail wpt lz;8ip. m1i i p,v+d(j*ie.qk3v field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere a i6e xqf00* k3bt86 vbeuwn8k6,bnjqcnd a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway bet6 qx0 n8n,bwve*qb830k 6 ejb cufk6itween the center and the surface is

  A cubic block of aluminum rests on a w5,j2brh )wedd:n ry 3oooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the,:re)5r3w d ybojh d2n charge on the block's top surface?

  If a conductor is incz st*2mtx) z -n60wo1,qylcx electrostatic equilibrium near an electric charge

  A positive point charge is enjq-s1j: a/v8xo cal0aclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow vaxj0co8 lq sa:/j-a1sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductw n;hsj7why6 u (z;xcy4fh-i4ors in static equilibrium.

State Gauss's law.

  The charge carried by one electromfgu) jsj5yc g84g7k, 5ydgr9n 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 hgfhq0dn90t m i)gegd d036,te w,ogv: as a net charge of +2.00 mC. How many more protons than elecdge,0d w,t0 ef0h: )o6gdmnq vg3git9trons does this piece of plastic have?

  What is the charge on 1 kg of prof(f9,ju* 8lp)c tv .m+ qlqpnotons?

  An atomic nucleus has a charge ofqvu v:l0/sxa cf :,.ep.nt9 lm $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separalmwxbqnn+ wns9*v0.f n s)f i(:s28goted by 1.5 cm, have charge values of 2.0 and -4.0 mC, respecbso 9wn(qm. f wn)sln8 +nxi*f0v2gs :tively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 15 ihbd/t12fqjgz6f z;gy o7 a) :nok+m.0 N. What is the maif2 znd1 +j7 b ok6;5ft)z/qmgygoah:gnitude of the second charge?

  Two 1.0-C charges have a force betwe dgx0weg/)d 6nn+s;agen them of 1.0 N. How far apart are they?

  The force between a us * pg6p2c5hv$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ey0dww03 ;te(:m7scd ug.nv ix xperience a 1.0-N force. If they are moved to a new separation of 8.0 cm,c v0wsdmt g0u; i(d.3:w7yn xe what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Th- 1y tq2pqj-rte first charge is at the origin, the seco1ty2-p qj-t qrnd 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 +2no ycn) j/*9zc.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 electrostatic force whcjc oyn/* )zn9ich acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 ib-*hq8idi bwxr6 o;.:xfr q;ywl/(emC at 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 on the 3.0qiyx b:r/b;q *ew ;(ri-o6dwl .hf i8x0-mC charge?

  A point charge of +Q is placed at the center of a square, an ) f7ufn z9qx0pag(s6gd a second 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 that acts on the center charge if a thirfq(9) ugfsa p 0g6zx7nd 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, 0.10 m); Q3 = 5.0 nC is a0) iegc*llw y .7rm+cwt (0, 0). What is the magnitude of the net forcr) *lwime+0w g y.7clce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0. )r kwksdh:2o:b rb:*i30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is thedbirb rhw k*ks2:)o:: direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at t1s+ hc5uth 3oghe vertices of an equilateral triangle which measuresh5h3u+o gtcs1 30 cm on a 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 separated by 3.0 m. Atzfyhw z 7khqx*6s4h*a +q5o,s what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it wous+h* 4ykhxh7s *6q,aw5qz zof ld be zero?

  A +3.0-C charge is at the origin and a +9.0-C cha;df:o ud5,prh d h)(iluh1dl4rge is at x = 4.0 m. Where on the x-axis can a third charge be placed s dh5, h1rh)dd( iu:flolpd;4u o the net force on it is zero?

  Charge +2q is placed at the origin pj6e.rheb*9yf xnk h(;55s ; tf+l urnand charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force 5 fj;r nsk5e+*9(6bfhe. rtnx;hylp uon it is zero?

  A copper penny has a mam 3 h3)cgbm7tpss of 3.0 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 gravi5vn t+wgqo4( tty by the attraction of a fixed proton some distance above it. How far above the electron is wo4gqtv 5n+t( the proton?

  Two 0.20-g metal spheres are hung from a common point by noncskp axt8/5x 8bbn*uylj; 7*x bonducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces the uj k5bs;x8/8*tx7bpba *y lxnm 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 e09-b9m u4* hkzvk0dgx69*stwovr tlg lectric fib9d4 0t *kkx z-9wslth6ov 9u*g0vmgreld at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of 1.u)lxcgc 9pfey,z-+z0 50 m from a 50.0-nC charge?u9, +c-zplfe0 zc) gyx

  A 5.0-C charge is 10 m from a small test charge. -l n*uwiuqx5 .What is the magnitude of the electric field at the location of the tes-niwqlxu .5u *t charge?

  A 5.0-C charge is 10 m from a small test charge. What -uk -7iko-z b -lfk0ilis the direction of the electric fieldi oui -kf-0l-bl k-k7z?

  A 5.0-C charge is 10 m from a small test charge. Whabwe;)b;a(cgtq59 a zrt is the magnitude of the force experiencedg;c(awq; 5at)r9b bze 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 distaawp 3pb1i x bih)): b3sb6igtv3m9+dpnce of 4.0 m. What a)3i: 69b3 tim+p)pb vb gsh pdw1b3xiis 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 stick and a -48kb 8cjz)55wrkex:(-thi * ao uvjy6q .0 mC charge is p65-ec8jqak:xi kjvz w(*br5u )y8ho t laced 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 mar *.nbcijw524e2qlq k gk 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 ilqc5 i 2*2jgq.e wbkn4s the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20wt, 7drl.t9eu4pab c9 m. What is the magnitude of the eletc7a9,tpe d.wu9l4b rctric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 ml5c/.bldpq :0nm ahk8 . The last corner is occupied by a -3.0 mC charge. Find n5 hkpl:l/mb8c aqd0.the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at jqj jrc-*w r7 88cgrh5the corners of the square as followsg h8*rjjw 7ccrq5- r8j: +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 uniform elect(qkq+ /ex+ xs kfh67vqric field. What is the magnitude of this 6+v/ke7f(qxsk qq+hx electric field?

  A particle with a charge of 4.0 mCpeztun 9,0d7i 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 of 6000 N/C poikr+lit: :mru 4nting :i :mur ktl+r4downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ;i 3xgadn,s 1s:qk8dvtv)k 5i ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnituded v,svns)k:k 1xia5dq ;3gi t8 and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magns (a p :7qq/ln)y5j*qbms 1kacitudy)c qb:7 akns( ja5q1/*pq smle of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Wh9zat8h3 zbreqt1gnyez7em86 9x6/d f at is the electric field 6.0 cm from the center g96dz/9aeb8yn 3 fet q8trm1z7hze6x of the sphere?