If the north poles of two bar magnets are brought close to eac- nhb;3qb d)lmh other, the magnets w hq ld-3);mbnbill

  If the south pole of one bar magnet is brought near th ut)f g8ly(1lde north pole of a second bar magnet, the two mu8ty(1)llgf dagnets will

  If a bar magnet is divided into two equa jop4cg8f.ceyei* ;k5l pieces,

  The Earth's geographic North Pol:h(e,uxn :xu gvt;bk s1 yf7a6e is magnetically a

  The south pole of a magnet points towayvc2 .wg) +np5k:iuoo rd the Earth's

  An electric current produce27cl x(ewe m )nclvkx ;0p42hps

  Which of the following is c, r5 -wj-* ujjtnfv ji:w7m+yuorrect?

  A vertical wire carries a current straight down. bkf w+k7int-qo(u id8t6r/o0 To the east of this wire, the magnetk 0u8 i+t/ qowrton6kb i-f(d7ic field points

  A horizontal wire carries a current straight toward you. From your p3 pcijnqz5)) sns vz45 s3vu;toint of view, the magnpijtv4vuq3z 5);s5zn )3 ncssetic field caused by this current

  A current carrying loop of wire lies flat on a t fgnc1s3/ wdw8hp+zj hfn 6oe5d/;-n nable 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 magnetw1 fdc-;nfnw/568h jn 3en hzsod p/+gic field

  A current carrying cfl6.j /2n)d4lnptb. j- :iimckys*h js ;wtq ,ircular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a l ql,y4c. fpj6idn:*.m h)j-s /b2knwt t;jsicounterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is tysp :+c )u9ym d1+yrjvhe

  1 T is equivalent tow j2+cltz-wd or93 ja,

  The direction of the force on a current-carrying wire in a magnetic field 43 re6 4q()0xpg f*n xmhkkziuis described by which of the 6fqxhux4rm n 04zk(i*3ge)pkfollowing?

  The force on a current-carrying wire in a magneq;) .d7 d :si ul1a5 5xmsa,fbeohy4nctic field is the strongest when

  The force on a current-carak1 tz jk) *g8n i.dtk 4-.hy)nhwxub1rying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up i/w5+sv: plz4 -f shnyhn a region where the magnetic field vector points due north. What is the direction of the resulting force on this curwzvh h4 ln:sypf/ -+5srent?

  A charged particle moves and experiences no magnetic force. From this we caecz+0i7uo8 ain conclude that + o8azi0cuie7

  A charged particle moves with a constant speedyfz(v b9ouva4oo 2a20 through a region where a uniform magnetic fieldfvob2v4 9 (y0oaou2 za is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across 4) /npic tkflln+5nu4 a constant magnetic field. The magnetic force on this particn+npl4kuni 4 ctf)l 5/le

  A charged particle is injected into a uniform magnetic field such that irl0;b 9kc ra9xts velocity vector is perpendicular to the magnetic field vector. Ignoring the partic90lr b ak9;rcxle's weight, the particle will

  A charged particle is observedznx dtq6ng)hss9w04 : traveling in a circular path in a uniform magnetic field. If the particle had been travedq : )z9hnsn04gxst6wling twice as fast, the radius of the circular path would be

  A particle carrying a charge o+,kwyocy0ss pmv -*5sf +e travels in a circular path in a uniform magnetic field. If instead the particle carried a wk0*5sm,oc -pssyv +y charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed8k*lsru d/g hny;2+vtvr:u k+ V in a uniform magnetic field that is directed straight downward. The magnetir/d*lv guvhku +ys:2n+8 ;krtc force that acts on it is

  An electron has an initial velocity to tp5cwbv z2ke4-4 zf 4rxhe south but is observed to curve upward as the result of a magnetic field. Thecfv5-xzw4b z4re42k p direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a x8sd -uwgi8 97k r:bkcuniform magnetic field in the +y dirs: k78wi9-kux b gcrd8ection. 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 current-i gzvdle:vdiy h7094+carrying wire is

  At double the distance from a long current-carrying wire, th t0.vb z vjtgm( xf)gg;;n6rs:e strength of the magnetic field p:t0nvr.6j)f;z gvg; bxm( tsgroduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry idenf2zlaf 0o*g 7b .fe*e2-q /ivhzgj7intical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, the magnetinfj eal fq2.bg /z*2hgovzii* -7fe 70c field at the point exactly midway between the two wires

  Two long parallel wires placed side-b/j3dw jb :u5qoy-side on a horizontal table carry identical current straight toward you. From your point ojo/j :uwq b35df view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. r km.pczbrc5;obl0k 1 e6a 6c2The magnitude of the force between the wires is F. The current in each wire is now doubled; 06rpca.m2 obcrzkbl e6k5c 1. What is the magnitude of the new force between the two wires?

  A long straight wire carri l(f qt oc08je, /rbcu+kec-/ves current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the pcft 8jr,/ccebkq /+eo- l (v0uroton?

  A wire lying in the plane of the page carries a current (0b)aw11 nz fn*okjiiho(ii)h +tdz9 toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the pl01ik oi(o +id*nji a hbt9(n1zh)fw)zane of the page, from your right?

  Two long parallel wires are placed side-airp;vf bm3f17qb7a m ),m(w 6xqf j8dk 0wi:wby-side on a horizontal table. If the wires carry current in the w8xrbw(7 6mffq p0, m;: w)j 1aab 37dvfmiikqsame direction,

  Two long parallel wires nsw-h9:v 31 w5 6wncggdk;jhgare placed side-by-side on a horizontal table. If the wires carry current in opposite direc gks1 :6 cwh9d -hnj5w3nvwg;gtions,

  Consider two current-carrying circular loops. Both are made from one strkj uics)9q5w 81rsc u1and of wire and both carry the same current, but one has twice the radius of the othec r)1 wiuu8 cq519kjssr. 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-carrying circular loops. Both are mad.+eb w) ajfre0e from one strand of wire and both carry the same current, but one has twice the radius of the other. Comrwa b +je).f0epared 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 *yih1 d45dmwpwhen the angle between the wd 1*5pihdm4 yloop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop tha ozd 1fmb0s4*kk6e(uet is free to rotate in any direction will experience a torque until it0k*me fdu(sze641okb s magnetic moment vector

  What fundamental fact underlies the xj fuk/18k5 l97n q x 2l(*robuorj5yboperation of essentially all electric motors5u fbyr 5knq8 9jj(b 27/1k oulrxxlo*?

  A circular wire loop lies in a horizona 2 87yd,3eslqt(pj:y / ki7fela .aantal plane on a table and carries current in a counterclockw3q7,kllei/ t 2:fp7 .adya(ayj8 ensaise 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 currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m; ly q -oke:hw0v8c2iiq: nj*k and charge q is accelerated through a potential difference V and allowed to enter a magnetic0eo- l*yw2i:qc;i 8jk :k vqnh 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 consists of a charged y7,b0og;kiosybg-s j8xov1 a a0 9uu5particle 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 lineu9og-bxoabisayoy5g ,j701sv;u k0 8. 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+ cc1 do asx/8nn8uermqo3) t:2w7er;.dnsj k 0.60 A is oriented parallel to a uniform magn+;q k) dd8ea:x 3 82uen./joc n7scrt nr1somwetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directioh2/1myuhzh u 3u-ce.9 y texp+n 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 wiroa v)zn7ica -d /f:p0supxbzgfh(9/. e carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wiro.zh x7v:n 0sif pu/9-pdbzfa)cg/ a( e 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 andviwrjpl*-5( kk86xct is in a magnetic field of 0.10 T. What minimumc v8k6rp-5k( lx*itwj 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 p-k w/c5h r,sgT. What is the magnitude/5c-,rg skwph of 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 speed ofop.*yq mrjfk5y:c9ir, o6lq 7 $5.0 \times 10^4 \; m/s$ 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 sc7n1fxt*p i1 )n/ucu di2n6wg t9wvo+peed 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 north with spm*2lzanc*wo, r xyj 05eed $4.0 \times 10^5 \; m/s$ 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 speed ofnf 7 n 1t4rhvnk74ptx4d-dbz . $8.0 \times 10^6 \; m/s$ 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 sis/ 5ac *he1xzpeed 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 +g3kfzma4 kgr lb:m77(i + ais$3.0 \times 10^6 \; m/s$ 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. mhk g1sn8e4tru9 .jx q v./m9p What is the magnitude of the magnetic field at a distance of 0.15 m fr9nq.puk 1t4rg hjxm/8v .me9som the wire?

  A high power line carrying 1000 A generates what ma*rv(saa; 3 urxgnetic field at the ground, 1(;3rxru s v*aa0 m away?

  How much current must flow for y uf9q2-z4xnu $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long strabs/c 9 p 1l z+,cu w90yxrbw.(wpanz/xight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of ab0x/1p r s9apu9bzzcc ,y/wb( .xww+nlout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A 7c k0r54kegnxaojsu4-)t 7 ebin opposite directions. They are separated by 40 cm. What is the magnetic field in thexngc sj075k4ue4) t- eo krba7 plane 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 qk bb 8.t:y3 b:r(crmuqfc u7wspn(+w; d 4dd220 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What i+f mdu yqc;rt4n37rc(:( u:82dbwd.wbksp bqs the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A anrtwwyrfuu*16o)e w :2d 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the twy*u2 ww):o w61ruerfto wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are m/99bu s fpp ey.*g.kiigo3yet.. ov9ro.5zaparallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. Wham5f p..izi.k9rp oy/be9 3e.svoa* 9go.tyugt 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 in the oppositw0/o) fhl/enrsru ur(.e lc**e direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betweeufs /noclheu )lrr w/.er(*0 *n the two wires.

  What is the magneticok u2.ua5l ;fddb4 daz)m8xo5sp :i :8lh7uyx field at the center of a circular loop of wire of radius 4.0 cm when a current of ld)4o od2 8u5;5zufxal.dx :sihyk:b 78m pau2.0 A flows in the wire?

  A solenoid 20 cm long(j v c olox9arw)5+.bx is wound with 5000 turns of wire. What magnetic field is produced at the +v9a )rx j.xwb(o5col center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m w1 s 3tux5dim2long and carries a current of 4.0 A. What strength of magnetic field will it have at its 2sduxwti m15 3center?

  How much current must s.iv )6+a5cut *qap9ggz.g hupass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnegz.)hc6v+g9 u uia 5sg.at*qp tic field at the center?

  How many turns should a 10-cm long solenoid have if it imwd31 b dlsyb0j(m/k 8s to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 120 turns thd klhse l91v;1at carries 6.0 A if its dimensions a l1vldkse19h; re 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is idux tlm(5au--n a uniform magnetic field of 0.30 T. The current in the looa-x(5luu d -tmp 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-secmq ;azm)i1a nis,45 jdtional 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 ia/v *sl0bg/ 2 woln2rvs in a magnetic field of 3.5 T. The lbn2 lrlo 0 /2asgvv*/woop has an area 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 radius 0.50 m is in a unifocf)zm* 4n8t ullcx2h6o i)dh.rm magnetic field of 0.30 T. The current in the loop isldhh2zcn 4.ml) ucx8io*6t)f 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 x pmz;p9 +qo i01ddo37 s)yc:lbb2 frzT. The current in the loop is 2.0 A. What is the magnetic torqu9d)coybp;zmi0 d : 3zbls fp +2xrq71oe when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area u41t k li 33o8fm+; aemkksah9$0.25 \; m^{2}$ 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,8hs:h xskxpl/53 g ye; a single-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 bx)b iqkbs: be,.+y 5nvelocity $6.9 \times 10^6 \; m/s$ 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.wp.ydiy :p1e8 g6xg:ol zo- g-0 kV and then moves into a magnetic field of 0.040 T. What is the radl-g p6z gw:g yeidx:p.o1o-8 yius of the proton's resulting orbit?

  A proton is accelerated frok z,b*o.pbg k+m rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of gbb+.*pz, okkmotion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through h pskk ,2rnci;r3g7zm24fx 2la potential difference of 10 kV before entering a velocity selector. If the B-fiphc 2f3;2,74m nxg ki2rzlrkseld of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?