State the law of conservation of electric ch8jfpo-(j . ufsarge.

  Is it possible for two negative charges to attrkfc8o+n -5 sybfvg6+rn .: ytract each other?

  Is it possible for a positive and a nx0: tz0*v1wc nyv5 vmsegative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rodm8m86yt f y3n vbd8kyai/qj4/ acquires a positive chargn/biyv3y 88 k8/tfayj mm64qde and the silk

  A proton carries a

  The model of the atompw 2ey8p+ri/ z zxc*)w shows a

  A neutral atom always twe2v ; /hi.ru;icm2shas

  An atom has more electrons ,h (u ) bjq wu lxy9l.sz.-*1ajksflc(than protons. The atom is

  Materials in which the electrons are .rfdb /x)i l.jbound very tightly to the nuclei are referredf .r /).ldjxbi to as

  Materials in which the electrons are bound very lo g)zp1w,2j ajtosely to the nuclei and can move about freely within ,ga1j2wtj ) pzthe material are referred to as

  A negatively charged rod is brought near one end of an uncharged metab(n+dvlxg.o6cmbe* xc* 8*hvl bar. The end of the metal bar farthest from the*(b occ8* mb v xv*ghnelx6+.d charged rod will be charged

  Sphere A carries a net positive charge, and sphere B ikez59vw) ,tins neutral. They are placed near each other on an insulakn)vez ,5 ti9wted table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod ce*6+4d cwp gnp.zohw0lfzt6( harge an electroscope positively?

  An originally neutral electroscope is briefly touchu da3 jymxu+58ed with a positively charged glas8 xuym3+ d5ajus rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chi88q+ qjom o6barged glass rod is held near it. After the gl+ 8o86j imqboqass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sb;auj:86*m gy vgd4geeparate. Then a negative object is brought near the electroscope, but does not touch d4 6g g*;a:yevjmub g8it. What happens to the leaves?

  A large negatively chwy.uj+yzq2 m*v3 l8*xc7l rcaarged object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metala cl+wzqy*lmy3.uv *x7c 2rj8lic 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 Cyzzjzh6kjxl 02x )2m,oulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is l3*hip7 t8mz)+aepovharger in e7hzth83o*i avmpp)+ magnitude than the second charge.

  Sphere A carries a net k6x4ssh(:rz e charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement bestksx:h re6 (zs4 describes the electrostatic force between them?

  Two charged objects attract each other with a certai gwm:6,yvd h eu5;6dxo+-phv hn force. If the charges on both objects are doubled with no change in separation, t+u-ho d5: vv;ph,w y6xg 6emdhhe force between them

  Two charges are separated by a distance d and.qkb6, uv+ix vq1l5h o exert mutual attractive forces of F on each other. If the charges are separated by abq+vu,6xq.ki hv l5o1 distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to2w d*8p,jys zw the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced tw* 2,yjszdw p8o one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a dist:va fq4(x n27h;y )sgy+gk 9zd kalf*oance of 1.0 m. What happens to the magnitude of the force on th 2fqygnkodvgaf(x7y 9;l4 )h+a zk:*se proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by ah3.klvt fr2k -.km v3r distance of 1.0 m. What happens to the magnitude of t v.tm-rk32 frk3lvkh.he force on the first electron if a second electron is placed next to the proton?

  An electron and a prbt5b ;uv 3stk(t- f;9mytcc0poton are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electrt0c(9tbt;35 mvpbyukc- t f;son is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a s0b,/a(s 1no 8ul jlab(ry 3wg2jek c7gquare. 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 n018sl gj ,jy gk(/(bu72lweb3rca aoacts 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 centrow; hjj,;ywujl5v -cb) +ms3b kid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, v-j 5 ;;+hmcwblj3u)j sb,kyw 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 placed at one of the other vertices?

  Which of the following is not a ve:5l1d/ssy v; skp:vs sctor?

  At twice the distance frojymr)e . /ax8;cjf3;vum v2b lm a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a vmpo4tkd - xo3*v bu*8negative and positive charge along the lindmk *- x3* u48vovtbpoe joining the two charges?

  Is it possible to have a zero electric fiwe ++ ey3bifj,wdrt.h*cq,3e eld value between two positive charges along the line joining the tw+,hc3.r*w+djfbewy q ,ee3t io charges?

  Electric field lines near psitive px) egbd 5rn5r/xc8b ;aoint charges

  The electric field showndv*p/xwfi- w+h.db q7

  Can electric field lines intersect in free svh n c m6g82ze494wdl b;mxaj4pace?

  A solid block of metal in electrostatic equilibrium is plaa2ygt uk a76g:ced in a uniform electric field. Give a statement concerning the electric fieldy:g6t2g u7ka a in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are ea3h;lb w95rr ;x p4fmfach given the same charge, wf3abx p;r r45;f9mlh the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tdehr247tk .uhuedchp3 z423y yni. +mable in a region where a uniform electric field is directh u4y3ezup372.mh kd.ic 2eydnh rt+4ed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric3 wc b,qomo-x8jdm6h1 charge

  A positive point charge is enclosed in a hollow metallicjuxl adt5/2p- jp+ pm( sphere that is grounded. As compared to the case without the hollow sphere, the electric fiel(pj 5t2mp+uldj x/ -apd at a point directly above the hollow sphere has

State three properties of conductors in staticf( ,45w;tovo 5fhao ,jf iw)rj equilibrium.

State Gauss's law.

  The charge carried by one electron ) *en1ytkzhl 9x+ z.i/cdvrfs2ps78jufsg:7is $e = -1.6 \times 10^{-19} \; C$. 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. Ho/kin ;r5jxv(l w many more protons than electrons dol;inj/ rk(x v5es this piece of plastic have?

  What is the charge o1oxn..uyzu f/z+ d .b4)kv5g4wrce:jioae)e n 1 kg of protons?

  An atomic nucleus has a charge of f)sci+905 ikwrz e/1odu(p sv $+40e$. 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 valge,):jgm6x/la a v9nu 2ce)t;k 3q/cf5 kw kggues of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric f gm ng/age:)5 xgtef6jck 9,/ v)q cwa23uk;klorce between them?

  A 1.0-C charge is 15 m from a second charge, and the force between jf,l-q o xqmy)i;t 57swc,ks/them is 1.0 Ntx osk,l; cs/7,-j5qyi fq) wm. What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far aparxujgj 9ua;9n w 3t;5 wxjf,py(t are they?

  The force between a mbu2x /cq 7f7-2 t fphjxji1a1$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apar1spf9cb u93 )jccu t:ty/wp9vt, experience a 1.0-N force. If they are moj1w uc ttybf93p)u9pv:sc/c9ved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed 30hr:i0k p mmo 8dy.bhon 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 m o.ymdi8m03k p h:0hrbark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed onqhigs,u :*l;s32eme89tyba bsk5 a9m the x-axis. A charge of +2.0 mC is placed at the origi qes:a3hiul9e58y ; *m,s9t sb mk2gabn, -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 on the charge at the origin?

  Three point charges are loccpv 7 0-h u(fypxi dka;ikytuf)wr,n2d3 )i-8ated at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Qiwud tirv 028f;y3chy- pk u -a )7ixnp(,kf)d3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed aty+oyh8 th4vqdz(w,u v ;s6 x1z the center of a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrost(yodv+ 4xhh,yz 1sw t 68;zqvuatic 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 nC is at (0, 0.10 m); na(2+jorio: vxbrcs d73b8g6 Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5683bxg+ odvcnibj7rs2o (:a r.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC i)am65*z k t+f vhaa-has at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What i)kht-5hfv aa*a +a6z ms the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vevqq7 .g+vr+zt rtices of an equilateral triangle which measures 30 cm on a side. What is the magniq z.vrvq+7 tg+tude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.037b yrboo-9zpau739i - ndg wd m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatig in79ar33yo dop7zdwub--9bc 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 = 4.0za(xm sl 01ly( m. Where on the x-axis can a third (zsm (lax0l1y charge be placed so the net force on it is zero?

  Charge +2q is placed at the vi jaqr1f8)/j2a jlh7tx 39 cdy8f(yjorigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it8yhji)y9f/lctj a17fjx2jq( r d38va is zero?

  A copper penny has a mass of 3.0 g. i e .2bskya mkb1c,a,,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 the attraction of a f6-e)nn vv aw )g(hjgyi b19y2vixed proton some distan y2)1j( e)nvvwy gg a6-hivn9bce above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point b d7 e,tjrh m:veb u:89ztumd05y nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apmrumed9t e5,7tz :d j0 ub:8vhart 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 /kv7pzx2- wf (hdux q4magnitude of the electric field at a distance of 1.0 m from the nuclwfd-zx p4k/ q vh7u(x2eus?

  What are the magnitude and direction of the electr)i8v7zmmtu nu w/f9dw1 4xa8o ic field at a distance of 1.50 m from a 50.0-nC chargexdt)87mui9vuww/1 aozn4 8fm ?

  A 5.0-C charge is 10 m from a small test charge. What is the magnck7 mbr8 6d x(p xqa,pgsw*-4xgi41lpitude of the elecgpi*-m 8c7ax(4wx1 x kp 4bsqlrd pg,6tric field at the location of the test charge?

  A 5.0-C charge is 10 m fromty0rg 93doxoaxh8.4augx. 8 m a small test charge. What is the direction of the elec.u .o8hyd r xa0xgm ot4xga983tric field?

  A 5.0-C charge is 10 m from a small test charge. What g:-4 cmu,mhz cis the magnitude of the force experienced byuh-4mm cz :cg, a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a valus 8duk+r nxb4-aku7 d9e of 3.0 C and are separated by a distance of 4.0 m. What is the electric field 978s 4ku db- nkr+xaudat 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 chal5 45y7+l3 web ww4uypeh tgjw: w8kc7rge is placed at the 50 cm mark. What is wh7e:g tbw5lw wlcw5 u4 +y38y7epj4kthe electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark ofn.4pkwj5:* 2gtv rxyge:w n, h a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point pnr. :ej4 ,v2gwykw5nxt hg:* 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 fbwechf2( ztflo3 14/= 0 and x = 0.20 m. What is the mlz3f4 e c/h2f1fbwo(t agnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are ate2lg 8 dzn cu(g .9m/i5dh-ylb the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find theg89im -dchb lednzy( 2u l/.5g electric field at the center of the square.

  Consider a square which is 1.0 m on a sis f0.y;9b*sy roa2exade. 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 (0, 1). What is the magnitude of the electric field at the sq asb rys;9fe*a0x.2yo uare's center?

  A force of 10 N acts on a charge of 5.0 mC g. ,a1n)iojyl3tlz6h when it is placed in a uniform electric field. What is the magnitude ofa, h)l1gl 3ij n6t.yoz this electric field?

  A particle with a charge of 4.0 mC has a mass z7wo0+,wl5y4 y gflyux + g3fsof $5.0 \times 10^{-3} \; kg$. 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 fi4a x20 d q)uwlii+xav6eld of 6000 N/C pointing down2w 4v+uali xxdiq6a )0ward. 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 n uucm(1eu*p )xC. The ball is placed inside a uniform electric field,1puxc)u u(e *m and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriesz xqsrgp1tc 9e+xv2 97 a charge of +2.0 mC. What is the magnitude of the electrq t2 +zrgcv79xxps1e 9ic field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carrazn.py20 iy7x ies a charge of 3.0 mC. What is the electric field 6.0 cm froy7y0px ai .z2nm the center of the sphere?