If the north poles of two bar magnets are brought close tokakw 1 (rc8,jc each other, the magnets wa k,(ckc1rw8 jill

  If the south pole of one bar magnet is br hplrm a0g1n9nl7w7(aought near the north pole of a second bar mw ma0a9(n7p1 lh7gln ragnet, the two magnets will

  If a bar magnet is divided into tz-6 )5mbmo y3t4camyd8qi3 fawo equal pieces,

  The Earth's geographic North Pole i4 yaenwn cd206n(jv,ms magnetically a

  The south pole of a magnet points toway2 zf)dp4y zy1pl+ba /rd the Earth's

  An electric current produ wid*1k9if;9nbb5 zx eces

  Which of the followinv+px745auro7:3ogo/8e *s rs gw cr(tpfx vg8g is correct?

  A vertical wire carries a current straight down. To the east of tpn m;jq -eqx7q:l4iv (wxc5uau1;t8 yhis wire, the magnetic :n(- pi4;yxx qmtuwue8 51 7a;vqqcj lfield points

  A horizontal wire car)1v8xdef hl v,ries a current straight toward you. From your point of view, the magnetic field caused by thh 8,) 1vfxeldvis current

  A current carrying loop of wire lw( mp4y6 g)tzvr (f9os 31puffp 68 oxb2vlb*nies flat on a table top. When viewed from above, the current bs4yfv b9rfmp)6*(oputfp31 8gx2n(ol6vwz 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 field

  A current carrying circular loop of wire lies mv spxdwm7x e)j.ji*y1z3m3.flat on a table 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 m p1smdix ve37*jywzjxm..3 )the loop? The magnetic field

  The SI unit of magnetico, oex3/-qllnqa0*o vpcrs6 + field is the

  1 T is equivalent tosg j tjv4(9+ys

  The direction of the force on a current-carrying wire in a magnetic field is de wrqu5cb)(3idscribed by which of th)(cw5d irb3que following?

  The force on a current-carrying wire in a magnetic fi0x :7b vme2pvmeld is the strongest when

  The force on a current-carrying wire in a mag7j93,l fhp xsv;e5y2lyq2 yqsnetic field is equal to zero when

  A vertical wire carries a current straight up in a q eo x)m+bri m-jt/f(8region where the magnetic field vector points due north. What is thb -em)+jfm o/r(xt 8iqe direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fro eee9v9v. pv x*l8p a.ovd-whpc;10m vm this we can conclude that;pd9l* -9emv1ca.vvpx.e 8ehv0 vwop

  A charged particle moves with a constant speed through 8zndzw3awj )4 a region where a uniform magnetic fie8wn4z)zj3aw dld 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 a constant magnetir4a toa/y9 *yfhd(n u2acvt ;(c field. The magnetic force on this particla4vyao2 /*yt ht;(rcun9 daf(e

  A charged particle is injected into a uniform magnetic 44niymezn by 7n88qu5 field such that its velocity vector is peni4uzemby5 4q nn y788rpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observeg 87 gjc-7esuod traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of t 7gcg ojeu7-s8he circular path would be

  A particle carrying a charge of +e travels in a ca .pwjzba125,w p s-vmqm6n1xircular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circulap.n zp1,qawmx mb2s 61wv-j5ar path would have been

  At a particular instant, an electron moves eastward at speed V in a uni,/ic 91irkvzjform magnetic field that is directed straight downward. icz 9, 1ikrjv/ The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve ulp v:(f o.jikzk+q40upward as the result of a magnetic field. The direction of the magnetic field isu+qjlkz4fp:0k .iv(o

  An electron moving along the +x axis enters a region +6 yq3; ejiamgu ojhy-tz5/ e,taw2 v:where there is a uniform magnetic field in the +y direction. Wa,agw5 mtq ; 6ozv h+/j jty2ieyue3:-hat 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 straighz/hz4n u 3ch 2ju 3dcc)09mhgg)m(n tet current-carrying wire is

  At double the distance from a long current-carrying wire, tnqx w; 0h3,ic l7 llirl9lor((he strength of the magnetic field produced by7rlirl(; lnx( c qlhi 9,30owl that wire decreases to

  Two long parallel wires placed side-by-s it ls2e1ffpe; zm8b;-ide on a horizontal table carry identical size currents in op ;p- ebfs8i21l ftem;zposite 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 magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizonn+n 92zod.d/yenl, 2 le5 0b ghtjowo;tal table carry identical current straight tow /; zn togo.do50 bj2+l2dwnl9 eey,hnard you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betwef+ wdef+zwfp 5hd:s+1l4ji 7 wen the wires is F. Thj1+7 wfihw+fldws de+ :pf4 z5e 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. )s91m .ps efmjA proton moves toward the east along.em1spf) s9m jside 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 bottom of1w ,6(qfcnjqh2ld):p urw h;en54 kpq the page. What is the direction of the magnetic force it produces on an electron that is mo1 :jh ,n2(p 5pqke 46f;rqulqnchww )dving 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 tap*lp h+x+p- th l;2esbble. If the wires carry current in the same direction,*p+bl+2 tx;hpehps l-

  Two long parallel wires are placed side-by-side*uv.npjcdkd66m1 p)z on a horizontal table. If the wires carry current in opposite directioju61)pcmz*6dnk dv.p ns,

  Consider two current-carrying ciljfb8/ ;m;nxde wu :w1gqv2q 4r q-a.crcular loops. Both are made from one strand of wire and both carrqvxg ;8-e 4mq1/w. lcn2frw q d:u;bajy 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-carrying circular loops. Both kb/ +rt,:liklare 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:kl+rlk ,ti /b of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs whemrjjgb je eb3n 1t4on7; y7*0un the angle between the loop's magnetic moment and the magnetic field vector i30om*ug j7n b;4jjybnt e1re7 s

  When placed askew in a magnetic field, a current carrying loop that i:d/qb; rmn9):xs kziaa5)ufe s free to rotate in any direction will experience a torque until its m/nzfe:5qkam9i; b)s )x:raud agnetic moment vector

  What fundamental fact underlies the operatic1l ,vk1 ,uyua1n/h tgvf0 e1pon of essentially all electric motors?g,t1f1,v0u ypn/v1 ck1ulaeh

  A circular wire loop lies in a horizontal plane on a a.a0lb 7kasm,d0r)r utable and carries current in a counterclockwise direction when viewed from above. At this point, the Earth'l ma07rkausd)a b. r0,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 and charge q is accebu-m)q: 1 xor by;f(kblerated through a potential difference V and allowed to enter a magnetic field B, where imuqb(x - r;by)kofb1: t 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 chargei( vo8scxb 31rd(5hgx d 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, di h3 s bxicd51r8(ovx(gsregard 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 parallel to 5 wnzkg q -,zw*nzyz+sf1j1 a2lnj)h 9a uniform magnetin+,51)2s-*nfyz 1gwaz hwjqnz 9lkzj c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A )e: g(e+z6ze k6 1v m9yx9temombq2cwin 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 when it is pl f(//4 yxenos)+u/jthz .fpg) qsp9gnaced in a magnetic field of 0.020 T? The wire makes an angle o)q/p th jyf)gen 49 ps+/ufzn s.o(xg/f $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m longgz2um qu4:c 5cdqb39c 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 magneticu4c32g q5 mbc9c:zu qd force to cancel the weight of the rod?

  A stationary proton is in a unif)kr/l7qwb j xa.ykx),orm magnetic field of 0.20 T. What is the magnitude of the magnetic force on the protonk/xblja ykx ).7 ,qwr)?

  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 d2 6gqviymk,m)guvb ( 2t: 7zcof $5.0 \times 10^4 \; m/s$ 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 speedzi6b d.*ko 4*s,gbok o 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 nortgyl5 q ,;(lfsdh 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 speed of nt 4 ed +j/rrfi5pl7+d$8.0 \times 10^6 \; m/s$ 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 spe6x/tdyo+ 0okr,gpy1 w kyvo;+1 chzh8eos* /led 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 speed4)z 52fszn5q sy/tx*ecnhlh h7 +acy4 of $3.0 \times 10^6 \; m/s$ 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. Whateu pugu35kz4k+k 6 ls( is the magnitude of the magnetic field at a distance oug ( 5kuueklp3sz+64kf 0.15 m from the wire?

  A high power line carrying 1000 A ger wp.55 +a 5ekoj2nhtuot-zl x1s7; zinerates what magnetic field at the ground, 10 a+1z.es 7 n ojr2xi5p;wl5-ht utk 5zom away?

  How much current must flow for j7tan)d27:nm x1jg zpo4un1p$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a curre8 xsgf fqu11( 048joefwewpp:nt of 5.0 A is the magni x fsf1084g (eu1qop:8fw pwejtude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They areu r ,v*k+p1nwvp-a:nz separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from thnk *:+ 1nupzvarwvp-, e other?

  Two long parallel wires cag pexgwtha ;(t/ 5w)s;rry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the(;t /5hs; xgp)tgwae w magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.jzbmc((a1vm( zsj ;5 v The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires t(szc5((;a 1jbvmmzv jhe same?

  Four long parallel wires each qdm .l8n*m;yfjp d+ :ycarry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. Whajn 8.*;dyp :ql fy+mdmt 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 op-p6cw +lms bqqsysq2t905+ 0yq5tb smdur:,lposite direction. The wires are separated by r:qpq2c bqswt -y u5,d+y+095ql ss0msm6tlb0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of2.gnz)p zn i4a radius 4.0 cm when a4 inza2pn ).zg current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What /m+b 6ehazmqugmi; 9+9(pl jlmagnetic field is prodm +au9 zg/hmlm69i( be j;+plquced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carr:*p6xv :sq /px5pvanp ies a current of 4.0 A. What strength of magnetic fieldq:p:/x ps v65 npvpa*x will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long 1mxc)ys6hv 6o mm16k4 tqduw:to generate a 1.0-T magnetic fielv:ud6t4sq1h)k1 x6my w mmco6d at the center?

  How many turns should a 10-cm long sol ,v9y s:7cbccs t7-eysenoid 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 3xsec/w5z) v )3 vqygemoment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions ae /c)yxv qs3)e53g zvwre 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50cdl uq-4 6cik. m is in a uniform magnetic field of 0.30 T. The current in the loop is udk4. 6li -qcc2.0 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-sect(hqqfkd(qsb5u 855(xhg k6d-p . l qgoional 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 fie+wxrbr.j5g -g ld of 3.5 T. The loop has an area bxg+rw-.5r jgof $0.12 \; m^{2}$ 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(;wvg p2.i x rgd9fm/p of radius 0.50 m is in a uniform magnetic field of 0.30 T. Thi( d9.pgwx;gvmf /2 pre current in the loop is 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 y .xlww sf 40k-k1 tim8/zxpjt8vj+v7 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 of8ifkp7j xt0m -tzy4s+v1 x 8w/vjk .lw the loop is parallel to the magnetic field?

  A circular wire loop of a9* ladj-h6 3i.oq )vmir +gyug6-oe pwrea $0.25 \; m^{2}$ 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 single-charged particle (charge e) has a spee:en1i sg+ *+toni0ze ozb ln70d 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 velocit8.su wxps6z ,uc08ovly $6.9 \times 10^6 \; m/s$ 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 1cl;8(epa 3ine p4+p hi.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resn e; ehpl38ai 4p+cp(iulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic b4qq-7 0rde ov.lq)shfield of 0.30 T oriented perpendicular to its direction of motiod4q0)q qb -o .eshlvr7n. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10c, l)njcgc22dgmgrp qyb 5;xo44 h86u kV before 8 rcg dg;g6u,jqoy bn c2 4h52pc4x)lmentering a velocity selector. If the B-field 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?