State the law of conservatio ppn tncy tq7x+o+;q/;n of electric charge.

  Is it possible for two negative charges y a7;6tnhs7cxj ,yvi, to attract each other?

  Is it possible for a positive and a negative charge to attract each ottx/v.al8 j8e* ilp qrj)1n wm)her?

  A glass rod is rubbed with a piece of silk. During the process the glas ;vqnm )b+cv nwbh*a(0s rod acquiw;*( n m+hbcq)0avb vnres a positive charge and the silk

  A proton carries a

  The model of the atom shows -qm (-w m0:uvobam zb7a

  A neutral atom always hawmep- xrld-tx.79gopmm v l0(/ v1e /ws

  An atom has more electrons than pr8uhnlt 68kg652 hn2dw/ zjgz(qgbuq1 otons. The atom is

  Materials in which the electrons are bound very tightly to5c,bbtz 15dnc the nuclei are referred5,z1n 5bbc dtc to as

  Materials in which the electrons are bound very loosely to the nuclei and can ngh30 w*emf 0 2x6f,3olubtffmove about freely within the material are referred to bo2,0 3 fxlwn e60mf3fhugft*as

  A negatively charged rod is brought near one end of,j.fl7:qssu qxx n0n. an uncharged metal bar. The end of . uq0s:xl.j ,qsx7fnn the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They i lg04pp)dox,are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. xi ),d0ogpl p4 Which statement is correct?

  How can a negatively charged rod charge an electroscope poso.. zpzq,yokc*,jtvwq r+ o37 itively?

  An originally neutral electroscope is briefly touch0xj byhatn/s((fs7)jajyzw,u (, )t xed with a positively charged gl7)b(yj), ,f ys ta nxhsa xt(u0(jwz/jass rod. The electroscope

  An originally neutral electroscope is grounded briefly while zw:tl0vi eah a 8/p7,va positively charged glass rod is held near it. After the glass rod is removed, theh a /v ,iaezp70:lvtw8 electroscope

  A positive object touches a neutral electroscope, and the leaveizeh,o*d xy0o ze qb: /c73:trd2;fxrs separate. Then a negative object is brought nea,crfz:o7xhbddro0* z:yix2t / q3e e;r the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged o2dfg)ce-( dnu4-pmi zc7 fnj9bject is placed on an insulated table. A neutral metallic ball rolls straight toward the (jz- fd)c ncd9f-iunme2p g47 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 object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulohu1dk:; 6upcl mb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance w8 j3;d9zyebtd. The first charge is larger in magnitudejd;b89we 3yz t than the second charge.

  Sphere A carries a net c- y4cqv+jg3yy d hg+d96kp/hpharge and sphere B is neutral. They are placed near each g3+ppqcjdh yvygyd9h /-6k+4other on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other iwv +zf(u3; vawith a certain force. If the charges on both objects are doubled with no change in separau fvi(+w; z3vation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces ofl chvz)wj 58)z F on each other. If the charges are separated by a distance of d/3, what are the new mutualz h vwjz)85lc) forces?

  Two charged objects attract each other with a uu5:7 dgr: lrzforce F. What happens to the force between themzudu 7 r::lr5g if one charge 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 distuurkq806 + u eqh:qq k-zr9olipb7 *6zance of 1.0 m. What happens to tqzrke :6u+ip - h ub8qk*u6zlq0r9 q7ohe magnitude 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 1.0 m. What has.*x0y0 hqnwv ppens to the magnit0vs.x0q*nyhw ude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated b:xxk6v s7x7spy a distance of 1.0 m. What happens to the size of the force on the proton if the elec x7 :pxkssx7v6tron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the cebvt3n0b f5keph;4b:anter 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 center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net elect 0;atf 4vk: pbn5b3bherostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral1 qphk r;* rhk/he-a8,d3-n2cyq en pv 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 r;hk y- 2ppn 8-qhdq na1/c3kh,v re*echarge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is a7i lu9k3/ c77 hugwssnot a vector?

  At twice the distance from a point charge, the strength ozspr; 0 -f:qr qtd,3y7r,rsvyf the electric field

  Is it possible to have a zero electric q26odn1kg3 p3tv6t9+ fuvm r hfield value between a negative and positive charge along the lineno9 fmrkhtp q6dv33g16 +vut2 joining the two charges?

  Is it possible to have dnuhj14 b8pd (a zero electric field value between two positive charges along the line join8 bdh1 (jn4udping the two charges?

  Electric field lines near psitive poinh3vt q,(alq ,nt charges

  The electric field s v2fo+p:5 wqbchown

  Can electric field lines intersect in fr8jlv6meug *.b6a ni:cee space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform ey v b*bdd)l(syk ,y.u.lectric field. Give a statement concerning the electric field in the ,*dbdvuby.)y(k sy . lblock's interior.

  If a solid metal sphere and a hollow metal sph+1f. t cz d5)al5l h,n:q/wubcbghsu:r**rmuere of equal diameters are each given the samegw/ mn q1 t5h:h ):bbcd,*rz+lu.sl5aucruf* charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wherej+af3 q ;*co(d7mnxxf a uniform electric field is directed straight upward. What can be said concerning the charge on the block's (njfxm7;d x a+f3q* octop surface?

  If a conductor is in electro c)r9ucg7h5fqh puga 22ote0/static equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere tha)z tb.tn8 5mgvl qpv4;t,bl-et is grounded. As compared to the case without the hollow sphere, the electric field at a point directl;ml etb 4z.v5 qbl8tntp-g) v,y above the hollow sphere has

State three properties of con/ p iqlwhj3 :c,/:jorola5wm e.i p61qductors in static equilibrium.

State Gauss's law.

  The charge carried by obt;s /b(v(f ci)i8jxone electron 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. cr1 vx-.zhe:p00 mC. How many more protons than electrons does this piece x phz: 1evrc-.of plastic have?

  What is the charge on 1 kg ofj; mf-nh+g q+ i,ijes8 protons?

  An atomic nucleus has(6u-+hcb. f 6r6li, z una-ot .jirzli a 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 char+i v01prq6uu lge values of 2.0 and -4.0 mC, respectively. What is the magnitude iu 0 pulvr6q+1of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between the lpv *c3lsz hh..ab(e2m is 1.0 N. What is the magnitude of the all3h2.(s.*hz cvebp second charge?

  Two 1.0-C charges have a force between theq yi-rq 8/lmjl y(i+k b-jrlta-z0q ()m of 1.0 N. How far apart are they?

  The force between a ,f2nfxgiy h - ,rcoy )8kxls e)la69n7$30 \; mC$ 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-Niob.ebxd.oil a20 4 cv56dh5n force. If they are moved to a new separation of 8.0 cm, what is the electdiex4o6cohb 5l. nv5 aib02d.ric force between them?

  Three identical point charges of 2.0 mC are placed g b b 5i5z*ichdi1hm)3on the x-axis. The first charge is at hid3)ibi55c1z gbh*m 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 at the origin?

  Three point charges l myv1,ez44rinzvy fv2dw 7+g-ih6 1aare placed on the x-axis. A charge of +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 el yzvm v+21-iw iy a,41derhnvl76z4fgectrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC ay+) y2xer rl w y.3ho-lw+3lpat x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mCxp)olw32ly3+h -ayler w r.y + 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 2 zg vsklggb -wqe ,;3x54blg2at the center of a square, and 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 third charge of -Q is wgq 54z3,gx-gl lvsb2eb ;2kgplaced at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m6 -nt0aqsl x3dggb6o 2s lfie52z6p(xn v6gl5); Q3 = 5.0 nC is at (o dxfiqxb s3-lga0gt6 vnn2p256ll6z(s6g 5e0, 0). What 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 udy9jl4l.t+abj+7d / v nj; etis at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on theb+ly7 +jl4 jvu eta/;t.dnd9j 5.0 nC charge?

  Three identical charges of 3.0 mC are plam n s++ ln)-uzu*ivqdy6l- wb9ced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the vi* uwy69 )-ll znsb+-+unm qdelectrostatic force which acts on any one of the charges?

  Consider point charges 42 xx+8 ycfm7g-ga/y wxrl8kyof +Q and +4Q, which are separated by 3.0 m. At what point, on a liwy4 kf/8gx8mxa yl +xry2 gc-7ne between 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 ab-rn6gt2. p q+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it it2ar p .6q-gnbs zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where c 7* k+ vdjeqt1lgx2,f7wke1fxan a third positive charge +q be x1v k,ftj1l dqe7 7x +wkeg*f2placed so that the force on it is zero?

  A copper penny has a maf/96z zrqfbxnx9 n ;i9ss 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 by the attraction of a fij4n7vq 8) m,svunv (wbzdh/j :2pbh2 exed proton some distance above it. How far above the electron is the proto2 qsbvuwvhnm,8 b z2e /)( 47jdnhpjv:n?

  Two 0.20-g metal spheres are hung from a common 2 zkuq)kxt ,imw(5wn4point by nonconducting threads wu5w n i(,zk4x)tmwkq2hich are 30 cm long. Both are given identical charges, and the electrostatic 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 magj / mc8riiii/ -)9thapnitude of the electric field at a distance of 1.0 m ipiair t/)9m hi/8c- jfrom the nucleus?

  What are the magnitude anduoke yl/z()v z4g1)-bw,p n gw direction of the electric field at a distance of 1.50/noev(wzwb l4 p1z,)uygkg)- m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What yge198i m dsga8yco 8.is the magnitude of the electric fieldsam9d8yy g .8 gie1c8o at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directiro( 9wnfs/ gf;x6p.m j5 x5urhon of the electricx/nmwgs 5p 9ffro.;hj (r5x6 u field?

  A 5.0-C charge is 10 m sedj* c9l:hdh s l0h.o-e502 fuonmn*from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of t.5nhl julf- s0eh* oomnd2e0d: 9csh *he test charge?

  Two point charges each hafwnp9;xo.wdu1 clv h. ;g6 c7vve 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 between the two char;wnuc h..poxg d7l f 19vwv;6cges?

  A 5.0-mC charge is placed at the 0 cm mark of aqoj 4u5ntgnat-m9 - md lx s;.g/db4l9 meter stick and a -4.0 mC charge is placed at the 50 cm mark. Whats9adg;lb/4 4 nx mg q.od-jtl9n-mu5t is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sti -pb1xm0iat5e t, ;hwnck and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the elen0b titwm1-;5 exp,ah ctric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = rz1 /e64d ye8pt,kvy;z v,tf x0 and x = 0.20 m. What is the magnitude of the electric field at the pop6eeyz; r,txk8,fz 4/ 1 ytdvvint midway between them?

  Three 3.0 mC charges are at the three corners of aur6 lq3)l; huz square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the elu 6ur)ll;3qz hectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are p hg96k5bdwr8x),bxnklaced 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 atg59wrh )xb,b 86k kndx the square's center?

  A force of 10 N acts on a charge ofrbf *zm:t15vrjy4q4z al 3us0x)th0 a 5.0 mC when it is placed in a uniform electric field. 0z3yrtm4x)f 1r* u4 sthaq:zalb v50j What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC h* oorw5q8x bh;as 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.nx1 gf3/anr(twh- brj.e d /;w120 g is placed in an electric field of 6000 N/C pointing downward. What charge must bex.rh/nrn wwbg-d j f3/ea;t(1 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 placedfzn1 fsnepz+ 81o6x )y inside a uniforxy ofzsp 816)+nz fne1m electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 ccc :gcm+ .q1y*j7 hxaum carries a charge of +2.0 mC. What is the magnitude of the 7yg* cxcu:jm1 .+a qhcelectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 ym0k30t6lmd o cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center dky m0 ml03t6oof the sphere?