State the law of conservation of elecd km z e./0983j-xcewl 3viuzytric charge.

  Is it possible for two negative charges to attrkbo5/ oqwi1y /.wtt)k act each other?

  Is it possible for a positive and a negative charge to attract each o6lqxd4c(4ik 9 wv dd5kther?

  A glass rod is rubbed with a piece of silk. During the process the g1t ppjh8vpcs37 f: 6aplass rod acquires a positive charge and the silk3pvfpjpt s6h 8 1:c7ap

  A proton carries a

  The model of the atom shinv2+ :7iay buows a

  A neutral atom always njx 4ts0yzu o c5)ezc6* v2x2thas

  An atom has more electrons than pklsaj 6-3x; fhrotons. The atom is

  Materials in which the electrons are bound very tightly to the nugrtyrv hb8 t iiw r9:qc2j: w)jg)-c.1clei are referrejrj9 1)2:w q:rg -vtcw tr. 8bcygiih)d to as

  Materials in which the m/onk)mmh; 3 e-qrw 4gelectrons are bound very loosely to the nuclei and can move about freely within the material are r3)mm; o/khemw-nqg 4r eferred to as

  A negatively charged rod is brought near one end of an ue3 .d ysn2jmm)ncharged metal bar. The end of the metal bar farthest from the charged rod will be cha edsm3nj2)ym .rged

  Sphere A carries a net positive charge, and spher f4x7.ty9ryfmmj.6r 7uomyp - 4vdu 3be B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire t f yp7. 9v6m.muyryu- 4txbdmr7 3oj4fhat is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrosv;i7m3vhfpq .jjn4r( cope positively?

  An originally neutral electrosco 1)1;*nqa cloie7 tg.(7qdkc welng(tpe is briefly touched with a positively charged glass r( d(k7 wq)nln ;io ctgca.71g *ete1qlod. The electroscope

  An originally neutral electroscope is grounded briefl u:)phnle8d6r y while a positively charged glass rod is held near it. Afterreh6ul )d:n 8p the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, anv8400rjzjyt nd the leaves separate. Then t048 v zrjnj0ya negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively chargefgfzz u 1b7jl567o +vid object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touz6oij771l bfzfug+ v5ches 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 Coulom/6l 8pp sf-bmhb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated tydkw(y ,n3nmyhf lx;kg crj7 8f e5e/ /8os*,by a distance d. The first charge is larger in magnitude than theyy x;m dof*l 7 we/c/ 8j( ntn,3gh5kyrsk8e,f second charge.

  Sphere A carries a netgbe.z8m-,tej l2ca b7 charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best descr-.mbbe2 87t jlcza ,egibes the electrostatic force between them?

  Two charged objects attract each other with a certain force. ts 2qr749rpsgp i +x9lIf the charges on b sgrx24+t9 s7 l9pipqroth objects are doubled with no change in separation, the force between them

  Two charges are separated by a )e bto;oem+kay0 8ql(kf6 t7yto ,oa2 distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what aremkqa8 2o bfyt6t)k7e,y+o e0o(to; al the new mutual forces?

  Two charged objects attract each other witcu2rh()pf 4dgn*u/h p h a force F. What happens to the force between them if one chargh fpru /np2cg*h(d)4ue is doubled, 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 distanceti/ zbj;vi0drkp;g;8v-lqo7zq. s- d of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first ekvgz;d;7-s dr ;bti8/.qq v0lzo j-iplectron?

  An electron and a proton (jc+x bhku5xy+ibl83are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a sec+x3b+5bx8(jk iyhc ulond electron is placed next to the proton?

  An electron and a proton are separated by v:n .db(98mbjz rkv8y a distance of 1.0 m. What happens to tybzk(d :8brjmvv n.98he size of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the ceqccw c192t ywmge-f 5tw-+ bw9nter of 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 acts on the positive charge at the square's centcywt c5+gqbwmc e 91w-2-9 tfwer. 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. Whe vxg6 :jb-f*mhn 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 charge of +Q pl*fvh 6x-b gjm:aced at one of the other vertices?

  Which of the following is not a y4nzhaeknj7 6)4;b8vct v pz;vector?

  At twice the distance from a point char7x1 lz 9pndn,wge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative 5ti9j(:d 1 fd;qm8 ivkcxxpn5and positive charge along the line 5ndd5jtcmi;q iv(kf198 x:x pjoining the two charges?

  Is it possible to have ;6pqke;-ajarjp /w py-mzqbm+o1( )o a zero electric field value between two positive charges along the line joining the two charges-w6pb;e 1/j )okam+;a-qrpozmj p( yq?

  Electric field lines near psitive point ows7mo:im .1 s1- (qku5m xgydcharges

  The electric field s,zwt;.xgn9cq e7u c; fhown

  Can electric field lines i y5dztt5y q(rjk:ik14ntersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in k:ozs9 s)pp:( dh3o3pwv3br ma uniform electric field. Give a stahp m3:kropp9sws(od3 3) z vb:tement concerning the electric field in the block's interior.

  If a solid metal sphere and a b6c4v.oezip hbad+(p.n9e r5hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfac.be9r6haoc .5dp( +ibenpz 4ve is

  A cubic block of aluminum rests on a wooden table infaje :2s)1we t a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's te)a1sew:2f jtop surface?

  If a conductor is in electros2/2q kmueypxvl3 5wpgfi8)7h9uio y4tatic equilibrium near an electric charge

  A positive point charge is enclosed in a htd 3gyvbp)h3se. a06gollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the elecybst d3 3h)g g.ep6v0atric field at a point directly above the hollow sphere has

State three properties of)pt b 3uayh bw 44hi cg*fl*z0-mig52q conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elechow0e7sypy5x , ) mpc bx:i1;htron 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 cl3slo3i+w nsy(an kitor q4 m+s79 49tharge of +2.00 mC. How many more protons than electms9n4l3+ias 9(qiotk7nt s4orw l+3y rons does this piece of plastic have?

  What is the charge onee: /iv c)qr)wq3nqv; 1 kg of protons?

  An atomic nucleus has h+)eo5 z k;5 zml9dcaza 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 val1godit. fl *f (;hp*cpq nh4o/:jt4abues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric fo1g.:of*otjtdh clq4np(/ i;*p 4b afhrce between them?

  A 1.0-C charge is 15kmn 7vc1o-y :tx )wr(w m from a second charge, and the force between them is 1.0 N. What is the magnitude vcytnw:o r()xwm7 1 -kof the second charge?

  Two 1.0-C charges have a force bet7 uqjr5 mk9(doween them of 1.0 N. How far apart are they?

  The force between a yvtw.nmuw42. 3o0 o 59xrsl ku$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initi wmuvz3k)hg ,ur j( 843d8flceally 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric fojwgd4 ,v kl3 )e (hcum88zuf3rrce between them?

  Three identical point charges o y,x*0b5uowrtavro7, ahx 7u 9f 2.0 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. What are the magnitude and direction of the electrostatic force which acts on thwau7,9b 50rou7ta xv r*,oxyhe charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is pla/ m3ktc n5:bgaced 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 whg:t3 cn 5b/amkich acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 i(,qxg m z+juxo +mz)2mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is t(mzjqzxo+xi2), u m+ghe magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is plajj9*g)8yr ik e7 ;qg 5yd+d n-chx:ucaced at the center of a square, and a second point charge of -Q is+q8cre)dgyj 7:xhk ay- 9g;cd * 5uinj 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 placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1o;tgerg3 /ky/ . pyhq).0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of th t )qyggpy;3/e/h r.koe net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.06m8 jl49xua ay nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of jm xa8 au69ly4the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral treog.kx*k 0 3udl-h4vriangle which measures 30 cm on a side. What is the lxdoverg0 -h3kk* 4u. magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges o-v x6y +4nssr* ohc2t +bzp(ecf +Q and +4Q, which are separated 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 the electrost xo(vc2* ps+c-+ y4tbe 6nhzrsatic force acting on it would be zero?

  A +3.0-C charge is at the origin ;wcpo; spyd) 0and a +9.0-C charge is at x = 4.0 m. Where on th)0 s;cowp ;ypde x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed lglv ,yi:s2 5qat the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placli5vy 2, qsgl:ed so that the force on it is zero?

  A copper penny has a mass o (qf c+ fg,sfgg74x4laf 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 by ua qmrar. 0b;hce./v8 the attraction of a fixed proton some distance above it. How far above the electr/ av0a .ruq8 r.chb;meon is the proton?

  Two 0.20-g metal spheres are hung from a common point by noncondwt/ 8j:hoj fhs 43mx;4zszay(ucting threads which are 30 cm long. Both are given identical charges, and the electry4a ss 4z;zj tm/w3(jhf ox8:hostatic 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 electrih8lh rttc6f8:c field at a distanclrh68: tf8htc e of 1.0 m from the nucleus?

  What are the magnitude and(r8h 9h/je7dweq a/ fk direction of the electric field at a distance of 1.50 m from a 50.0-nC chargqefdj hr w/7a8e(/ 9khe?

  A 5.0-C charge is 10 m from a small test charge. What b61(*rbtnp;k o.rf jm is the magnitude of the electric fi.fn1trm jrpb;b( ko6 *eld at the location of the test charge?

  A 5.0-C charge is 10 m from a small tes:;ss6tk:bs a onbi-le ,u b6)it charge. What is the direction of the electric fu isa6: ib6tb) ;s,-sonklbe:ield?

  A 5.0-C charge is 10 m f2z j-a*t azs-xrom a small test charge. What is the magnitude of the force experienced by a 1.0 a*xa2tzj zs-- nC charge placed at the location of the test charge?

  Two point charges eac)ye)tegit 5g +1f,*mo ;anboxkck44lh have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between5;f)oa 1ke4me) tgixg cl4*obn+ tk ,y the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sti,dkm5l 8 e4wthq1 h2cnck and a -4.0 mC charge is placed at the 50 cm lnh4 ed2 w51hmtc ,8qkmark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark7n atw e8dmkm81;e uzlazg/r.5i+d, v 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 char.5kzm1m+wgie e ,dda 8nazl 7r ;/8tvuges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placzhqt 28so m,u*g- /alged at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between themumz -ql* h8g/2,gaost ?

  Three 3.0 mC charges are at the 3 a()-shxowf ofw ,te7-x* chmthree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric fieldm wec-oa xf3w*o,(7 th-fhxs) at the center of the square.

  Consider a square which is 1.0 m on a red7 rm p*x zrd:dte+w6;t:; yside. Charges are placed 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); -3.0 mC at:;d+*e6dywtt;e pz:xrdm 7rr (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a char+a jbv7gr*a7(feo xbs3,bl ywgo : /h-ge of 5.0 mC when it is placed in a uniform electric field. What is the majx*obf(sab/g - 3ybg7rao :vw,he7+l gnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass me10ep7j, 10eoyr8snz ag gq(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 a j1fl: vt4l //kwzzmw;n electric field of 6000 N/C point1fvlwz:k;zmw4/ tlj /ing downward. 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 ball is plnu(d5iw55h ul aced inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the5(5u nuwlidh5 electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is tarzy zd3 /7897 ew/1gndopvjhhe magnitude of the electric field 5.0 cm from the spz98oh 7r 7pa1wgnd/3/ veyzd jhere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.ve9war8y:hj( b *6l hq0 mC. What is the electric field*qjv9lwh6a h :ery 8b( 6.0 cm from the center of the sphere?