If the north poles of two bar magnets are brought:p8 gx)rs/lgu close to each other, the magnets ws :8u/lpgxgr )ill

  If the south pole of one bar magnet is brought near the north pole of a seconde ok+:xj,f.y4 7md6ghkons e, bar mag4,.skx yf gomned 6:k +ohe,7jnet, the two magnets will

  If a bar magnet is divided into tpa 0 im wduj:zmh810 1f/b(qxowo equal pieces,

  The Earth's geographic North Pole is magneticallyj,b7cedb+ jv/ 9f k2vz a

  The south pole of a magnexccp*k v/.m+znssb 4(t points toward the Earth's

  An electric current prod knm. yk,)l-a8r( sjruuces

  Which of the following is)51o3n5bu*8wvx a2+i fyc.m zyessr j correct?

  A vertical wire carries a current straight down. To the east of pj*ams7gv 79rui. ty/ lvgw/, this wire, the magnetic .gilgumj7rp9,tas7wv */ y/ v field points

  A horizontal wire carries a current straight toward you. Fro-g+ o 3c;qygch 1pe0yqm your point of view, the magnetic field caused by this pq1ycy ;-ghc3q goe0 +current

  A current carrying loop of wire lies flat on a table top. When viewed , iju-+bulv(r d*1 edwb6r8 oafrom above, the current moves around the loop in a counterclockwise sens- i v w*brou+1rjdde6b8l(,uae. 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 flat on a table top. When viewedgc :m6gl)hr)aw mb97n from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused 7wnm : ramgg9b)6) chlby this current, inside the loop? The magnetic field

  The SI unit of magnetic fiel wscvr-xr5 efg7,j/a.d is the

  1 T is equivalent to6fc3 9jh+ omvz

  The direction of the force on a current-carrying wirsu46+kg ow yhw(ce4 1ae in a magnetic field is described by whick wy+(1oh4was g u46ceh of the following?

  The force on a currentliupd*g z42ux +*;6jxcczn :y -carrying wire in a magnetic field is the strongest when

  The force on a curre33si s w.)mhufnt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the ma,-a czocm3 00dy ojs*5(mjxvegnetic field vector pointsc o e0c0vy,majod(xm-3zs*j 5 due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. pb06i hdytp0ht 5n/ 3g From this we can concl np0 ptihbt3gdh0y 5/6ude that

  A charged particle moves with a constant speed through aol9k)3 goog g8 region where a uniform magnetic field is present. If the magnetic field points st8 logko 9)gog3raight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. l iid 7 9r )sgta:z63lwphtrn6 ;/uz0s The magnetic force on this particlehzt punlls3sia66z rt0)7: idr gw/;9

  A charged particle isy r/* :ctka/mg injected into a uniform magnetic field such that its velocity vector is:/ct/*m akrgy perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is obse *hp(0im-sma grved traveling in a circular path in a uniform magnetic field. If theg0*(map-i hsm particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of 18y t) oe.w5cro( islv+e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radiusiwoeylr(85 .ts 1o)v c of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniforb.h,h 6j ya5*if7suk hm magnetic field that is directed s.hb5fh, *k ishu6j y7atraight downward. The magnetic force that acts on it is

  An electron has an initial velocity tonu5btlmto v/z9 g26 0dtx)3 sml s7pk/ the south but is observed to curve upward as the result of a magb2sgz9o 3xtk/6mp)ds/m ltu0 ln7 t5vnetic field. The direction of the magnetic field is

  An electron moving along the nto, c8 u.x0dp+x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and c out .dn80px,+z out of the page.)

  The magnetic field produced by a long straight curreg5ika:lna 8z4nt-carrying wire is

  At double the distance from a long currgg2i(t0qlx t x(d.m,q0b+mqukr-ii hv7 ).o eent-carrying wire, the strength of the magnetic field produced by t )i(eg70o2+ t( qr .,0qmh g xkdlmvqt.ii-ubxhat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table car.*p(7qg kcokr5/ob 3 sat5kb lcht- ,pry identical size currents in opposite directions. The wire on your right carries current towara* b bl,ohr7ctscgk5(5 p3/p qok-kt. d 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 horizontal t ,5q 3krx1s/1ru esgb 2c*jiyiable carry identical curgc / x1,bs5srkyq12e i*ruji3rent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equa mf2 0b zgz(48cbdz9ezl currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the e8(zc z dgm09f 42bzbztwo wires?

  A long straight wire 8jz 4is j )br)g6y z7vfx;qk-ncarries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the foq ;jxf6bv)8ks yrnziz j47g)-rce on the proton?

  A wire lying in the plane of the page carries a3b3 esrlrj( b4zj wg9mv +af6+ current toward the bottom of the page. What is the rbs3jwjle+6+gvz3f rb a9 m(4 direction 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 table. Iiis;; ypxa( ev )ld0fq,m: ,0zlq iz9kf the wire vadm:p()e,fliz; x 0,i9q0ski;qyzls carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tabaaw , 0ld 81p +udwln-xhmv5+xle. If the wires carry current in opposite dire ldandw058l1 x+ au+x- w,pvhmctions,

  Consider two current-carry4kpv0 aow9+)g0rm m lting 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 field at the center 0mw9)0k lt 4+pgvaormof the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying cir f. m(5 xf2hk yb3-peny,2tmbqcular 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 magnetq.xp ktf3mem hfynb,5 yb2(2-ic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrrawkz3 /15qeiying loop occurs when the angle between the loop's magnetiwrie1q3 za/ 5kc moment and the magnetic field vector is

  When placed askew in a magnetic field, a curguzs;t7x6d*+iyslp54jfy pve5 x 6m 3rent carrying loop that is free to rotate in any direction will experience axpp46 v7s fi* yz3st exjy655lgmu; +d torque until its magnetic moment vector

  What fundamental fact underlies the operation rdckh 8eibej0 e s0;98of essentially all electric motors0s80eeb hic; 9ed r8kj?

  A circular wire loop lies in a horizontal plaak37,pshnqo2 4,i; cnacbb 8gw8 l*none 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 an,a ,n;kpq4s 28bl 3*co gb8iwon7chthe 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 accela:hng2ibf;ykbfsy9obm40d)w bx 8j1:1 b1 lxerated through a potential difference V and bm:s1j ngowa2 dbb y91h8;0xylf4ikb1bf):x 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 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 particle p b0wt/u-9pydb assing 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 o- pwd0ubtb/9yf 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 j1t7sre;d3th+v h .tvparallel to a uniform magnetic field of th3vdj+;t evr.h1s 7t
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currenthqy zb:-8nrbeq ;)q 5v+0(t yaho p(by 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 straight wg m 7ny4+cdc6tf2vuxm a9cx+ k8/v/ccire carrying 5.0 A when it is placed ic /v4tncku98 /fvgxm+dccmx7 +c26ayn a magnetic 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 masna4/9l8 yc y6wx w1y2oyi8q yqs of 0.050 kg and is in a magnetic field of 0.10 T. What mi8a8q q 2 6o19y/yxycy4ily wnwnimum 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 f0v/h / 3pnyj:s)sx5 gxmaky,8 u;3e 4sdqm wmeield of 0.20 T. What is the magnitude of the magnetic fow/ /0s p;umy enmx33)xsqs ,4 yh5avd:8jkm gerce 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 spezmm16rqyomt7u etz7e5j*wg e2 z y 1-+ed 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 f(-n-t,gozvna 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 north wmyboeq3 2 yc;m3+jf8 pith 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 withj i0hg csuw9v ;97ij9t 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 sp h5 zhg9wc1b41me;ya6g g ac.weed 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 ofjhe c0s8t7*): vdccix $3.0 \times 10^6 \; m/s$ 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 cap v+ dv+,twi/hka p9m(rries a current of 25 A. What is the magnitude of the magnetic field at a distanc( ta,vpdwik /p9v++hme of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fieldtv 3t5x x8cud h15ajzp2zu47u at the ground, 10 m awadx pu8t2 z1jv5uc h574a3uxzty?

  How much current must flow for m4yy1 kqxv9b+s0b jf/$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a ox;qvfn5+;k vhwm7d) long straight wire carrying a current of 5.0 A is the magnitude of the magd5v+)ovxf7;wq nk; hmnetic 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 currentsepw)(dba k,,w :8igbc of 10 A in opposite directions. They are separated by 40 cm. What is the wcg ip:8a )w,,edbb(kmagnetic field in the 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 yb)1i oseqtv)0z 1s ;yu6pddtb,(t . h20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between theo ,d y t1qvdubztsi(hb 06t;s1py)e ). two wires?

  Two long parallel wires carr( cat2xgf v/0mhzc,npq25g lm.t:-rp y currents of 20 A and 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 two mc2 /2pp:t5a-xqg0 zl n rhf(gt.cm ,vwires the same?

  Four long parallel wires)u fzip e3,)mn each carry 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. What ma, ip3eu)m)f nzgnetic 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 oppdbr1:1,zbmi q0fb 3b tosite direction. The wires are separated by 0.30 m. Find the mtbq1:0id 3b, rfbz 1bmagnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop ofnhb25ds/ 1pm5v)e jvp18q2rate (xq6o :j jgb wire of radius 4.0 cm when a cuemv1gh/nr jp 25pb x(o8q)jv1b 2q6jas5de:t rrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnvqu e/n 1wul v)bp252betic field is produced at the center of the solw25 )1 /bbvuuv2e nqlpenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a 2mlruns 3o,3lah;hz(uyja0 2 current of 4.0 A. What stn mlo2yj 2hu ,a3l0usa3(zhr; rength of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a 1.0lp8yqx i98j4n -T magnetic field at t4q pl8i j9nx8yhe center?

  How many turns should a 10-cm long solenoid have if it is to generate a rc jm:t.j-rw yxf.s p 4zs *3d*z)hvt4$1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangz9 ; ) z033eks:esxguhvklv6eular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8ks3vuk3;v hl) 9ez0xe s:z6 eg.0 cm?

  A circular loop of wire of radius 0.50 m is in at9d::uxasx7nv )ol;a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is ;ax)7:tn9ao:lsvu dx the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sfff5)drjn,8eb: s--xjb usu6k;j f8u ectional 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 carryihi+ev4x m 69qio-ab /jng a current of 2.0 A is in a magnetic field of 3.5 T. The lovqi j-+m/46bhix9 ao eop 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 uniform magnetic fi8w :(e3 o: 9t-givuqqlbo5krxeld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic t- ti u(k95qeb3 wql::r8 xovogorque 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.w a9n5x,r2 /jw:wpspyqap t0k: p2b+r30 T. The currentrpx9pwap ::q/,2 w t0njbapsy2k+ wr 5 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 wire loop of area 9ou*t/zvpur - qymc 80$0.25 \; m^{2}$ 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 speed ol6pmxt nkzzbdi6 i6512t b 2d9f $1.0 \times 10^6 \; m/s$ 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 w f8dv*ypx+ u .dy-lng.ith velocity $6.9 \times 10^6 \; m/s$ 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 througkj*4d27s* dczk tmqb;h a potential of 1.0 kV and then moves into a magnetic field ofd*bzcmkj* ds7 ;4qt2k 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It e6+h q.dofpi -unters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Deto+qid-h6 pu. fermine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difq9 r dquhk4-h8 u9t w(er9ocy8ference of 10 kV before entering a velocity selector. If theq( 9uhh94r etuok w8 ycrdq9-8 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?