If the north poles of tc1+9*stzs:jvhff k )mwo bar magnets are brought close to each other, the magnet:* fsvs f hz9jkmc+1)ts will

  If the south pole of one bar magnet is brought near the north pole of a seq, os ja lod7l6w9zu**cond bar magnet, the two magnozaujlq 9 s lw6od**,7ets will

  If a bar magnet is divided into two equal pieces+*topiqcqaz572o mp: 2en l)16d iofk,

  The Earth's geographic North Pole is magneti+b dz(fk1 tw/tcally a

  The south pole of a magnet points toward the )uludzjl1pkjgg j-q. l-m8 5)7w iy4bEarth's

  An electric current proq3 0kqd+s -nxfduces

  Which of the followingku(ia/36cc5z lm xl uex39pu3 is correct?

  A vertical wire carries a current straight down. To the east of this wirz. e4 f11okz ls3wyqum9ui3a: e, the magnetia.uwe 1kymz4l3u3ios :qz91f c field points

  A horizontal wire carries a current strtqrn p+p3/1l3 nukr4maight toward you. From your point of view, the ma k/nl t+up 3p4rn1mq3rgnetic field caused by this current

  A current carrying loop of wire lies flat on a cruu / g*8;+,u1:fj qcxssxf 6 donq+se:i/q dtable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic 6ursi 8usx+oce *qffqc /sdx:q;1 /,:d ung+jfield

  A current carrying circular loop of wire lies flat on a table top. When viewed58ccvq5isx .a o;;xbho0kv f+ from above, the current moves around the loop in b;0s5;c. 58+xivqvhox c ofak a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic1)1 wcypsc8fivr4ts. field is the

  1 T is equivalent toy4i1 v4evqr o4:jlu9mqre 75f

  The direction of the force on a current-carrying wire in a magnet88dcwxid;( yq8z fzx:t w;t7d ic field is desct7w tx8;;(dic zfxdd8 y8qw:z ribed by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongest t3kyj)rza-04wi );xk3r u iahwhen

  The force on a current-carrying wire in a magnerwz7j-ko ws t,w6 ,cycqw d1))tic field is equal to zero when

  A vertical wire carries a current straight up in a regiobi, ou5qz+g:com r:9vn where the magnetic field vector povb,+:og:9 orui z5 mcqints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no +p*:yx g viw52io6mvkmagnetic force. From this we can conclude thixvv 56k2w: yio*m+gp at

  A charged particle moves with a constant spmmmd- fgbn+ ;;eed through a region where a uniform magnetic field is present. If the magnet-f;gd b+;mmmn ic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic f7g7t0i)gksjov 7n lu+15gosua5* ppv orce on this partvuv 15*gi 7nsglojgp7a0u5po+ t7 ks)icle

  A charged particle is injected into a uniform magnetic field st8lxxeh391wq. rg /m)jj2wr ruch that its velocity vector is perpendicular to the magxtw . r8jwem32)jq rx/gl hr19netic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circulawrpwk+ebn1 ef2/g x:/r path in a uniform magnetic field. If the particle had been /w:xp2b+r1 kwgene f/traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e 1 k(ml nret6+vtravels in a circular path in a uniform magnetic field. If instead the particle carried a n +(let m6vkr1charge of +2e, the radius of the circular path would have been

  At a particular instant, an e o;2e*val -jwxlectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that xowej v;al-2* acts on it is

  An electron has an initial vel/ehdby65kiwzeuj:k0 f0k ) l1 ocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magneti bj1z0uhdiwkf 0ek6/y):l e5kc field is

  An electron moving along the +x axis enters a regiw 4f4 ke7 ayxx6g;lvz5on where there is a uniform magnetic field in the +y diw;xv 6ye k7 lz4g5fa4xrection. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curren; o qr ovwb0e39 wz*8owgx+-nmt-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mapxmx4qnl j.c :h ;nub -egd74(do4el4gneticplgdb x74 :-4l qmo.ed n j;(u44hxenc field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizonxk(6 c (hks91d h.bxeqtal table carry identical size currents in opposite directions. The wire on yoe sh96cxkxq bdk(h(.1ur right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires npj):jb3k65x5tke6 f ntmbryw,5f.xplaced side-by-side on a horizontal table carry identical current straight toward you. From you5 tjkeb6j3fw.n5r:x b6 f nmp5t),kxyr point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carr7ukc y/3cpla 5y equal currents. The magnitude of the force between the wires is F. The current in each wire is nowluk/ca5 cp73 y doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carri b(- qa7b:xnpzes current toward the east. A proton moves toward the east alongside and just south of the wire. What is t-: zbbpa(xq7n he direction of the force on the proton?

  A wire lying in the plane o,9dxkf6 3ir6uaz 0pc r)l3 vdof the page carries a current toward the bottom of the page. What is the dirx v9cl,63dzopk3f0 a6urir)dection of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side onyk(2g*nzeaj i u 4*ku5 a horizontal table. If the wires carry current in the same di *4g(ieaz*uk2ny5jku rection,

  Two long parallel wires are placed side-by-side on a horiz rguc. 6rxb8n3ontal table. If the wires carry current.r83 6xr ncbug in opposite directions,

  Consider two current-carrying circular loops. Both are made from one stra 1u,b s8tj qkbp(oyz-9nd of w9t,b k-o1ub z8qjpys(ire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrys7cch,ag9) vlfx:t 5xing circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop isav5lx,c )h9 x7tfgsc :

  The maximum torque on a current carrying loop occurs when the ans m:- 2hdrjpq.gle between the loop's magnetic moment and the magnetic field v2rpm s q:j-d.hector is

  When placed askew in a magnetic field, a current carrying loop that is free to gr2my ; xr.b (uoe ar1bh;,6edrotate in any directioxd(e;e,b yog61r; m abh.ru2 rn will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentialdk/ kv; q0+wgo0lmq1cly all electric motorsvwkgm /qq c+0lk0;o d1?

  A circular wire loop lies in -9 emf-; 3igikvz:hs:n2 vvhm a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the curf:- zmv:vgk em 2sn 3ihi-vh9;rents interaction with the magnetic field?

  In a mass spectrometer a particle ohyn /ry v*zumcg,(n3 24ux 5eff mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular t hmvn/5,yu2 4yf(3z*r e uxgnco the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chargedbp5u s96zg3kphnv( 3o particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to the nortg6u3n35kv(zs b9 po phh. What direction should the electric field point?

  A 2.0-m wire carrying a current oy4x bk/h-gru5 qk a(f9f 0.60 A is oriented parallel to a uniform magnetic fikahy 4qgxk-u /95b( rfeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 0+ nob wadwh7zgz0/ j2A in a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per meter on a straight wire carrying 5.0 A whe.e,zasn*6ajbq d d5/ wn it is placed in a magnetic field of 0.020 T? The wire makes an angle5a*n,wd b6.zseqa/jd of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m louhem.2yu(zg(2dywp q4 3 pj1yt 6 od.eng has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the y 2u1mee4(wdz hq(pg.6 y32tuj py.odrod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Whatm2pc z3 -c4rso is the magnitude opc s o4-2czrm3f the magnetic force on the proton?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves with a spmo2fq hq )5 4u,wdrd0weed of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a speeu)* czuf b..ja olw/-id of $5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling due nosn*6 alffa;;6 zugna *rth with speed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves with a spe3,nlh4ui s. r. rgeck2ed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves wityvgwd 48 b8. 4)i8r(te(xzelpg5 tknlh a speed of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speed of kz y kdz0cw4),6bl4e w$3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight wire carries a current of 25 A. What is the magninw w/ 9zngw7a:tude of the magnetic field at a distance of 0.15 m from :w9n z g/7wnawthe wire?

  A high power line carrying 1000 A generates wydxdf ; )b5/ven3fzqhdu1m955/ s zz zhat magnetic field at the ground, 1; dzf/)dzhm zq53e1u5xdfn v zbsy/950 m away?

  How much current musqk(i5 q03+i z;doa lndt flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of (el9+gex bc /xgr8q1t5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magneerqc/x81bge l(x +tg9tic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. cybjp 4l bg2h6az1f//They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that 62p ab f/zl14c/gh bjyis 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite diru)h0 +ab. 6b;np u8 f5+d crmvskotcg,ections. The wires are separated by 0.20 m. What is the magnetic field midway bek5t8rbc+gm; b. u0a 6f+shc )ounv,dptween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directiuu d-,w 9cc.x,xy:qp0bj xy ;nons. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two xjqw9x ,.y upyd:u;c,x bn 0c-wires the same?

  Four long parallel wires eacdv/rht54wtey u xsz(-7.ibb( h carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of ae-4. tbruts d 7w5(ybxi(hzv/ square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and bm9qz0 n4/r 2myl6 da2oc9nul8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betw6run bd ma2/lz2om09cy n9l 4qeen the two wires.

  What is the magnetic field at the center of a circular loop of wkny5,caa *jx* (3s qt bvdrc 3nk845mo/xq;iw ire of radius 4.0 cm whexsqw*/ntv8o,rk;jyad3cm * nxiab34qc55 k (n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is qh5af.xly.k ;wound with 5000 turns of wire. What magnetic field is produced at the center of the skq5f. ;hyalx .olenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and car(la v u(wrvqq h:v l ++..5az32vxp;q6tbhp mxries a current of 4.0 A. What strengtatmzw.h6pa q x5v:luql(2 qv+b;rp3+ v(x .vh h of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to 1ovo oa34ga2b-ku *p ngenerate a 1.0-T magnetic field atap2v1 o3on o4*bk u-ga the center?

  How many turns should a 10-cm long sol1k,qo 3hqi6txenoid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rec q ;tpa05vax5ktangular loop of 120 turns that carries 6.0 A if its dimen p5; av5t0kqxasions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is :x;7nn,nxbv9 fb1 frl 5ngo*gin a uniform magnetic field of 0.30 T. The : fnbnl 9f5g;rbo *,xv xng17ncurrent in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional area xu5cm 6es c,)l$0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carrying awx )a)7dxk ;xfl1ly: k current of 2.0 A is in a magnetic field of 3.5 T. The loop has an area o):akdy fkw l71);xxlxf $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of radius 0.50 m is in a uniform magne 8xulvg/(-wgutic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque wh-g/ 8(w vguxluen the plane of the loop is parallel to the magnetic field?

  A circular loop of wire rr-clru )ur3 *hxv(: lc5 vck1of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. l hr:rv3)u l*cxk-ucr(r1 5c vWhat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopqg +lj)8qn+3k;rui bp of area $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, a s 4p bagse a/qn*g mnd(-/lky,8ingle-charged particle (charge e) has a speed of $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ion with ved)0)r4iz ntm dxhw kcy;(rdb i1ux3-(locity $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through a potential of 1.0 kV andfwr1 v3o ei;ix:u:sc 0 then moves into a magnetic field of 0.040 T. Whaf eiu0ix ;c:vw31 sro:t is the radius of the proton's resulting orbit?

  A proton is acceleratedpv(v . s,e,xm g5;guza from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path iteux;pgvm,s g,5a (vz . follows.

  A beam of electrons is accelerated through a potential difference of 10 kV epd2hln2-md60ewf 1a before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T,6nwpa 21 eh0dem2df-l what value of the E-field is required if the particles are to be undeflected?