State the law of conservation of elect21lka ,cf0jks ric charge.

  Is it possible for two negative charges to :aj6k/2)ch*soj m mpcattract each other?

  Is it possible for a positive and a negative charge to atd/22ndsan(r:w9y6zbi q7 ucd4 qe: qglby6a 6 tract each other?

  A glass rod is rubbed wi2ia )h8kzbu) tk.9fnkth a piece of silk. During the process the glass rod acquires a positive chargebuh)k)8.fn i29zkat k and the silk

  A proton carries a

  The model of the atom e b,e kon*a,gggypy( m*7vc-5shows a

  A neutral atom always has ) e*zeca5j zyojko eh1d..*,s

  An atom has more electrons than protons. The ato .rv-vyon+q 7i0jb;mfm is

  Materials in which the electrons are bound very tightly tor kv-d;;5 d7 6hwanxyl the nuclei are referred to a6 5rk-; hya7wlnxv dd;s

  Materials in which the electrons are bound very loosely to the nuclei ad dsx k 7 )1gf,.t:lfcc)z:mvand can move about freely within the material are referrkmv)dt z)gc.fc:7 x1a ,fs:dled to as

  A negatively charged rod is brought near oneasd m 6wa8cm2. end of an uncharged metal bar. The end of the metal ba.mwmc2 8 6daasr farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They 7gv(b jd2rzn*3 p+ it)iv/vvkare placed near each other on an /32v *tp 7g+ (k ridvvzi)bjvninsulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?5l 6 bmrx; yms;m p0lk72qn(s9yb3ojd

  An originally neutral electroscope is briefly d7(iks *3 famktouched with a positively charged glas *da(7m sk3ifks rod. The electroscope

  An originally neutral electroscope is qm6eb fi1m * 6ewq0u-2xwh5pggrounded briefly while a positively charged glass rod is held near it. After the glass rod is hwm6xe2 1*b0qiumg-6 w5pqfe removed, the electroscope

  A positive object touches a neutrali/eqi*bxtk8 ; electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it.ie i/qk ;bx*t8 What happens to the leaves?

  A large negatively charged object is placed on an insulated table. Adw+c64rt7r,;t.zs b c *umqp z 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 suc+ 6zz.md7pr* , b; cqt4trwno 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 const1 wwk(y wg0vjv.rv-,*6vtoxn ant $k$, which appears in Coulomb's law?

  Two charged objects a m1baj/ i89ghcre separated by a distance d. The first charge is larger in maj1abg hcm/8i9gnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placzv-l y gq tbp(./wwl-2bdq-2eed near each other onl(-vw. b-pdl2 /gqzq-eywb 2t an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a ceiutbk*-txdy5*/s z v/rtain force. If the charges on botk d*x-ysb*/5vutt z /ih objects are doubled with no change in separation, the force between them

  Two charges are separated by a d z; bp5v o3 :u0xhxeq,w+;yrwxistance d and exert mutual attractive forces of F on each other.epqw5ybvh,r o0xx; +3 ;z:uwx If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happ yhsv538bhjil6m cup3h* /d+h ens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth imv6 j3/ 5d+ph uchh*il8 yb3hsts original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 h68w oy*mmu w h4c:fs+x2c5grm. What happens to the o4 uhm:cwrm ycf*68gxs w5h+2 magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are s56 adw3ab5 1; xhheopaeparated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is bhwa3dah ;651 e5oaxp placed next to the proton?

  An electron and a procrm-64 blb2 beo o,7zcton are separated by a distance of 1.0 m. What happens to the size of the fo,2b6mb4r c boz 7eoc-lrce on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center lwed j+;x fe1./)wwrj2uk: znof 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 ac:;ew wnjl jezr 2k1.df)xw+/uts 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 5qfwzl/ri p5 foums9xe8)14 bof 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. Whs9oqfx5z48 ef)5b iwpl/mr1 u at is the 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 vecr7zk gn z8n)mt7,s gka l-10jptor?

  At twice the distance from a point charrfw3cyp w7,m ;ge, the strength of the electric field

  Is it possible to have a zero electric field valm 0fm3 o0zq*oeue between a negative and positive charge along the line joining the two chargesoqm00eo3m*zf ?

  Is it possible to have a zer-l/yrqi h3o2 87bmcpsa tor61 o electric field value between two positive charges along the line joining the tcr3om7 il aoy8tq2p/h-r1b 6 swo charges?

  Electric field lines near z7p n0 9v :e.g8nd fbof(it9zwpsitive point charges

  The electric field sholy;fp1qlu* rz1f v b*)wn

  Can electric field l+iqeb9*8fr nfines intersect in free space?

  A solid block of metal in electrostatifez n u2;bc9-fc equilibrium is placed in a uniform electric field. Give a statement concerning the electric fieldbu e2cf f9nz;- in the block's interior.

  If a solid metal sphere asx4 jvwomf8sl u538 :hnd a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfjsu flhv48 :om385 wsxace is

  A cubic block of aluminum rests on a wooden table in a region where ibj7+hx)3 1qb nf5k7e 5-ph 4lrmieyq a uniform electric field is dire he5p-eb7li+ 7xbm31h ) r nf4i5kqjyqcted straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric cha2,nvy9k -:uyob4 vzg jrge

  A positive point charge is enclosed in a ik:+/m l*wokrhollow metallic sphere that is grounded. As compared to the case withoi +/:mrlkw* kout the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in staticro:3mvh d3fq gf;y*8n equilibrium.

State Gauss's law.

  The charge carried by one ele14wvu7qbh/hn:z6(i8 wnh jehctron 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 charge of +2.00 mC. Hy +dv0ka jl:i,ow many more protons than electrons does this piece of plastic+j, d ikl:0ayv have?

  What is the charge on 1 kgdw;i69g tmnj- of protons?

  An atomic nucleus has a chagbycgf)m,/,b6ggsr 1 rge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, s5,in an+2kml lj-:hrh17z ttieparated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. Wh h7+aih1jnttl-z, mi52kr ln:at is the magnitude of the electric force between them?

  A 1.0-C charge is 15 .d+5 kuz c*palcoq,a5 m from a second charge, and the force between them is 1.0 N. What i+z.k a5u,oc* dql 5pcas the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theyld72qdbi 4 fe6?

  The force between a ell/( .i8hc*cs ga2oj17 vicqqiqt:( $30 \; mC$ 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 forcex2zl7(nus ty87 vc lj y5/cs+a. If they are moved to a new separation of7a/tuy5yxv8 sc l n7j( +zsc2l 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mCje.b6spo8l/m35*k evyzogjypg59y ; 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 gj;ye56ogp/39 sl 5e yyzp.vk*8 j bomthe 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 qra7f:d rz 54n(r5koeq 7a/yjof +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 electrostatic force which acts /roznkdraq5y7 745f eq: (rj aon the charge at the origin?

  Three point charges are located at the following f.p6 na: u1*o:o1qwvl mdt )mcpositions: 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 magnitude of the force on the 3.00-mC charmlodtw1*:f :nav u)m.pcq 1 6oge?

  A point charge of +Q is placed at the center of a square, and a second p wo ,2uvgi35cyoint 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 third charge of -Q is viy 5gc32w ,uoplaced at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (7l:-wa r(jyj m0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What-m:a j7jw (yrl is the magnitude 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)jjrz3e 1ie*u4 fr-h r7; Q3 = 5.0 nC is at (0, 0). What is the direction ofir jfezrj*37hu-1 re4 the net force on the 5.0 nC charge?

  Three identical charg)dj w7k,8z,sl w)yvro es of 3.0 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 a, y 7o))dk,zslwvjr8wny one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At whad .pfimbm8: +fh .fx0*h mo,k:n-t2g udejhk-t point, on a line behfe+ 2mfd.b fu*h h mnt0ix:d.ojk:pm g -k8,-tween 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 t1(7 cmnx9 md4bkhsa;sl c+1z uhe origin and a +9.0-C charge is at x = 4.0 m. Where on the am hx;4nsd ul17c 1mszb+(k9cx-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at 9uwh fvt w0qzxc/)o 0bh3e7j .the origin and charge -q is placed at x = 2a. Where can t0cjx 3f7/wqhw 0 vue).h9zboa third positive charge +q be placed so that the force on it is zero?

  A copper penny has a maxc cq:6/.o c;p7y ykjqss 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 gravity 3 3vv0zxu;ia4 uwd8dvby the attraction of a fixed proton some distance above8u 4 ;dx3v zwavdvi3u0 it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hui -*5q d)vtnix30s0yo r/gwfh ng from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repu03 rtyn x)iwgdh o-5q0*/vfislsion 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 magnit5yvkjp d mk9sarez3y5c/ 3vsr ch4 +62ude of the electric field at a distance of 1.0 m 3rse3 sc v pm9a2v hjrdycz 4y/+655kkfrom the nucleus?

  What are the magnitude and p64hr * m1z2bpfq x9pedirection of the electric field at a distance of 1.50 m fro6r zp4pbmhq2f9ep*x1m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of th714 ce6fs wd/*7jh9d wbnu dgle electric field at the location of the t4f7d7 /jdebn lhuwsg19c6 dw *est charge?

  A 5.0-C charge is 10 m f 8)xj ,x6uysfxrom a small test charge. What is the direction of the el6f8 ,xuxx )syjectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnieh0ifpotj(z4q s;b9 tacshl4:/ 37rp tude of the force experienced by a 1.0 nC ;st3 /rpaoif9h(4 jpl4 :che7s0 tzbq charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by lacj)jd ed*+* l559egw1w)ik/uxet;ll3m ty a distance of 4.0 m. What is t+ wk l*j1lw5i9lu5 *ea3ldyg/ttj)dc e m;x)e he 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 -4.0 mC ct) bvedk,o8 t8harge is placed at the 50 cm mark. What is thee,kvt88 dt o)b electric 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 mClelhc* k 56)nb charge is placed at t lk5*e6)nlbhche 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of7qps1gs j 8o,:aywz4u +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the mag ,s1gq :yu8a js74zpownitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at thelsyobq/vka . 2d.w 19x three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge w9.1 .kad/bxqos lvy2. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are p1w,0ovahgan 0 7 s8uwq,6zn ymlaced at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3ysgma,un8a 1v0w o7q ,z6nhw0 .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 un0qvbby*zflicc ,w ):* iform electriif* :lv,y0*)zbbw qccc field. What is the magnitude of this electric field?

  A particle with a charge of : 5giwbtw1xb44.0 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 *ee3 i y05*dz xsnc6pqis placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the balsi5z n30dcexp *6 qe*yl for it to be suspended?

  A foam ball of mass 0.150 g carries a charg p+-jsead9 ds(6oxjk)e of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direxs 9)j kdd(6+ oap-ejsction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the m,(px+f1dg0;doevhqne 1xc +eagnitude of the electric field 5.0 cm fpd1 e1+ ce(dx v0,gxfn;hoq+erom the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elouwdt7sz )f +-t*w 95xhppb6nectric field 6.0 cm f-zubhnt9p +o76w) tx*sd p5wfrom the center of the sphere?