If the north poles of two bary k0w:p.j 6odh22wows magnets are brought close to each other, the magnets will2 w:o6h . kpwosd0ywj2

  If the south pole of one sk dy+a;o;1 q-qmc6f2ejn z9n es l,z-bar magnet is brought near the north pole of a second bar k zo-ny9+6 efjs1q-,ad;cn2s zml eq;magnet, the two magnets will

  If a bar magnet is divided into two-4f 9aan su7vv equal pieces,

  The Earth's geographic North Pole is magneti2d gygr;fiwq1p )c.tn)/3 dnlcally a

  The south pole of a magnet points toward the Eart/kzug4b0 dkym8lgesj n9o. )4nmp8 9jh's

  An electric current produce* c5hcv1.px ixrufm:6:se 6 nk;jc.hgs

  Which of the following is k pg24xgefbm1 go z7qyrif5,* 9hf(- .o6sgmecorrect?

  A vertical wire carries a current straight down. To the east of this wire, g3555g4fqp oajg elha(pp0h v-: sfg6the magnetic field pointg3(g5hg5a j:o5qhef-6v0plps g pa 4fs

  A horizontal wire carries a current straight toward you. From your31,bw6iqt -oiqtrt1 s point of view, the magnetic field caused by this currenti3wi qt-6rost1qt1b,

  A current carrying loop of wid 7py yjw w5x/d+t6 ,g4xhcp1ere lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What isc /pgtj5,1 ydwx+74e6h dxpwy the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tableizzd/y6 q+/ lg 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, inside the loop? The magnetic d6/l/+iz zyg qfield

  The SI unit of magnetic fielde :i-9;r tqxk+g83uc x *uifkx is the

  1 T is equivalent tok0 rvl wqh9y3a3fdlm) ;y.4 jzxh f51j

  The direction of the force on a current-carrying wirty8 )h3 kqnxb2n.w8ote in a magnetic field is described by which of th xnnoyt kq8b) .8tw3h2e following?

  The force on a current-carrying wire in a magnetic field is th:gw+baqp) at9ye-d*hkr*fa 3e strongest when

  The force on a current-carrying wire in a magnxae.+)u)pt/1ft+gf xvkb /qv etic field is equal to zero when

  A vertical wire carries a current straight up iuk) 5k5: k0,t91oohvylgr75 l pkpbwan a region where the magnetic fiev a:gu9lk55w,p khy5 p1otr0kk 7lob)ld vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and exp 29 incgsly 8x)ui-p.ieriences no magnetic force. From this we can conclude thasn gilp28c-)9 yix i.ut

  A charged particle moves with a constant speed through a reo,r ,chn.so18: fr+zj(0y k lzy 7xsxzgion where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force ay 1(z07 r n8z:y,sc.khfo,ljrzo+sxxcting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetica *46(re m3/b0h v *0zbgsh;r qcixvj,q-nups field. The magnetic force on t xh0n-cq3 sv(qbpah, 6zs4mjeu*vig 0*; /brrhis particle

  A charged particle is injected into a uniform yg:e,khw.ogb2 ,d/ fc,ygio 0magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring g 0o:wy,dgebc h2 /,fgoiy.,kthe particle's weight, the particle will

  A charged particle is observed traveling in a circulard(t5 7f qkxs-t path in a uniform magneticd57qtf kx -s(t field. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a cha o:ccx:hzb 2pt1u0z0xrge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the 0t :1op2xbch0:xzzc uradius of the circular path would have been

  At a particular instant, an electron moves eastward at sp t9o1cfuvk,0 eeed V in a uniform magnetic field that is directed straight dowk9te ,0 o1vcufnward. The magnetic force that acts on it is

  An electron has an ine+baly4 na 6r,alo9-8i, nvtritial velocity to the south but is observed to curve upward ana,ia9e r6tl-b4ory , l +8avns the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where t zhl0w+cpq(8v0x93p8a jmbtmhere is a uniform magnetic field in the +y direction. What is tz a39bm0qwvc +0pxl jm88 t(phhe 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 s9xjq qi 12ewnu uh//e5traight current-carrying wire is

  At double the distance from a long current-carrying wire, th )q/e*2vwbqtn dsm +1 /xwnnv6e strength of the magnetic field produced by that wire decreases bn 1t evswn2v6q/n+)qdx m*w/ to

  Two long parallel wi f0 841xwj nhrt74um:ow jiw5kres placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wir8nujkxtf w5041o :7 rmiw wh4je on your 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 placed side-by-side on a horizont15k5is 7 wrr kyql/xj ;.3wx7sfp4ge tal table carry identical current straight toward you. From your point of view, the magn pwx;j37rk75 sfl.i 5xr ek1gqsy4w/t etic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The mag9e;7tvcvw gy 1nitude of the force between the wires is F;y79 1tcve vwg. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward thqshd*i6ec7v3m9tw0 9h1 e0 vm dpx2kme east*23 dhpt1kc9e q0vwmm06dmsi ex v7 9h alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the botpx6fk1sv( dk3: 5 wyjztom of the page. What is the di 3:jfvkwp1kdz(y s65xrection 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 on a horizontal tablk(-3 j1w oci4hy y2n)2:xzmn0xl auzs e. If the wires carry current in th2kc:nz(ymxxs 23 zh oalj-wn)y u0i41 e same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. vn(q)ml jyy3-If the wires carry current in opposite diqvn- y my3j)(lrections,

  Consider two current-carrying circular loops. hxks6 ma-4,imv * ix8z7,8ikldqg,cv 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 field at the center of the smdvg v czx76,q,4il,*i8hk-sm amx8i kaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand5 + iscy)d+k0jpjxxwv3ioj 8/ of wire and both carry the same current, but one has twice the radius of the other. Compare++0s8 jow)y5xdi/k3j j xcvipd to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs whej8qdc0 ul3*b jn the angle between the loop's magn8dlu0qj*cb j3 etic moment and the magnetic field vector is

  When placed askew in a magnetic fizt ,qvtg56:idm.refzf8 a83 ueld, a current carrying loop that is free to rotate in any direction will experiencazm,er t68.i:utdz3ff5gv 8 q e a torque until its magnetic moment vector

  What fundamental fact underlies the oga;z)pro4vaxcr8) : v s6w yw)peration of essentially all electric motors?6 )vsc;)p yw gwrrox8 4av:az)

  A circular wire loop lies in a horizontal plane on z:oe: 90ngeno - il)iwa 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 c e i :gol)n:zi0w9-eonoil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m an0xp9:du/yd 80 tumv7rjc g4vcd charge q is accelerated through a potential difference V and allowed to enter a magnetgj70p vxt/dr8ud9ucmv 4c 0 :yic field B, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to 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 co* p5bg; q29p/4hg7wn/ paduzye(kboinsists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fien( pk5/2bqg 7ayzpg/b; *owuh4p ie9dlds 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 north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented paralv e1/7gm:hvzmnmme/ ki v t2:5lel to a uniform magnetic fi/e7e :nzvmh/ i1 m:m5t2kmv vgeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currewww9tjoi3j:d)fqffz w3,2;u nt of 10 A 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 s 3euq j:b)be/dtraight wire carrying 5.0 A when it is placed in a magqu j bd3e:/be)netic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic filuzaf+0n3w2xxx 7 hc9fjg l 5 xk-l7,geld of 0.10 T. What minimumxg, l-zuxcfh9fxwn57l0+gkalx3j 27 current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. W i ix+ja(hg/n,6sao ;zhat is the magnitude of the moh 6,iajxa(/i;z n+sg agnetic 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 withg5,7ly: ykw7)ub ehd s a speed 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 ;.uw;zlw dw+sz( ( n5lk6lvjqa speed 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 nortuyzj m( hsa983h 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 withj7 qr3yz09( ubfeblptp d32w n6et ;g7 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 magnetic force of the electron.

  An electron moves with a spqmct i6-s534qt;*ais zhb srdt5p+h )eed 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 odar2 yj)q::eif $3.0 \times 10^6 \; m/s$ 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 magnitu-f) sos0eh9 ohde of the magnetic field at a distanc foh)ohse- 90se of 0.15 m from the wire?

  A high power line carrying 1000 A generates w ne/wby5 sz1co28 iz8ohat magnetic field at the ground, 10 m away? ci z1/os82ozny5 w8be

  How much current must f(np6g .cbtknj 6w*l ufu 4ru7,low 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 wire4: 43 o0o0qjumf;(w bccsq) fffr xr(c carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Eaox3) 0qfc;0m4:c4j( bwo r rf(csfufqrth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires cujq. /w8vxk qh p)glff(7q 4j9arry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the pl8x /g.fjv47qpq kh)jl9 wu(f qane of the wires at a point that is 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 oppositf, 1 rm,v(zf*7xibm ho; e+oxke directions. The wires are separated by 0.20 m. What is the magnetic field midway between theh b;1frv mix,(koxzm,7e* fo + two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A i13ivh qdog7p /n opposite directions. The wires are separated by 0.20 m. At what point between the two wires arehv d7o q3/pi1g the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A iog a/v3xyo)v2 n the same direction. They are parallel to the z-axis, and they pass through the corners of a /v 23 oax)voygsquare 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 8.0 A iyppx7fen cv08e (t.n9 n the opposite direction. The wires are separated by 0.30 m. Fin vet9.pp( en 0cx8yf7nd the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circq m0n h.ys7n sxsr gd,()kns:.ular loop of wire of radius 4.0 cm when a cuhr0s ss n7 sx (qn,)kgmd:.n.yrrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wx+vn ;n dtd fb+dw4h))ound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A fxd) ) bvwnnddt+h4;+ flows?

  A solenoid with 500 turns is 0.10 m long and carrieaq.wh8sp q;s .s a current of 4.0 A. What strength of magnetic field will it ha 8.q;shasp .qwve at its center?

  How much current must pass throurdq zzpyr4n :)t4n((sgh a 400 turn coil 4.0 cm long to generate a 1.0-T t4qnnz(d)z:4 rrp(sy magnetic field at the center?

  How many turns should a 10-cm long solenoid have i:z+i5ta2mg ajf 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 rect u9 j, ,:sg;hkgsgy(moangular loop of 120 turns that carries 6.0 A i, ;osu9g,sm hk:y(jggf its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 00hf,2vsjfn p qgebnu es 1m1q4n+2z96.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is +49b1fef2n penguv,0q21 ss zh6qnjmperpendicular to the magnetic field?

  A circular loop of wire of .w z bk0ewr/nsyxm*7amo/a2;cross-sectional area $0.12 \; m^{2}$ 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 a current of 2.0 A is in a magnetic field of 3.5 T. v*f tnj 2nal1cd9+ c-d The loop has an ar2ald+-n *cjtf nvc 19dea of $0.12 \; m^{2}$ 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 ra+kuu b krh+gvo..k/ 3zdius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the mkr/vzugu b+kko h3.+. agnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is inrc2x:/ns*)qlp28 s pwh)ayf s a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallelsq2/:fcx 82lss )hpa* r) wypn to the magnetic field?

  A circular wire loop of aredd+y f 4o;zdyb:jrad:ndq( +0a $0.25 \; m^{2}$ 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 sif) 2wqvg3(s:7chg b2hi d 6kxdngle-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 velocityo(dwy1 ssv(sb 092iod o /lx(p $6.9 \times 10^6 \; m/s$ 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 thr, ct8 3m :ois) ,bqw qdm4ldur.*gzxp1ough a potential of 1.0 kV and then moves into a magnetic field of 0.040 p,dw1 z*qxqr s m,b3gi m4o8cudt ):.lT. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It entersp1 yp l5gg(8luhzd3o. a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it f.lugd5 1y(8hlz p po3gollows.

  A beam of electrons is accelerated through a potential difference of 10 kV befor 08csw( xamm*xzt 3ba:e entering a velocity selector. If the B-field of the velocity selector has a value( zx ts:a08mbx3mawc* of 0.010 T, what value of the E-field is required if the particles are to be undeflected?