If the north poles of two bar magnets are brought close t)ie6bqlfh8fsd o9p we- nz1) 9o each other, the magnets will9 of-lesw19)qdep zbf 8ni) h6

  If the south pole of one bar magnet is brought12 pccah3ferowg./or le l:9: near the north pole of a second bar mawp r/egcfaoe ocrl 932: l1h.:gnet, the two magnets will

  If a bar magnet is divided into two enq/o:l p3hly8qual pieces,

  The Earth's geographic North Pole is malvv;v,q yiu,ymnwy l /k,8o7+gnetically a

  The south pole of a magnet h1 ss;lsesc6(cj1z8 3fmom 5opoints toward the Earth's

  An electric current produce6o* o 9c0b.q9/7z k.7fpi8z bqg2 igbokjozl ts

  Which of the following rkyb+q + + mebw rj4sb-pmcb9k.co16/is correct?

  A vertical wire carries a current straight down. To the east of this0br)czc;: 6s x.kszft wire, the magnetic fbk6:scz0 ;.fct) szrxield points

  A horizontal wire carries a current straight toward you. From your ut gzh(lg*20p-o6abj point of view, the magnetic field 0*ujlgz(6bo-hg2 ptacaused by this current

  A current carrying loop of wire lies flat on a table top. Wheuu96d vuvx 0t qxx4zjv0+r4g oh,.6e; oss)cdn viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field causedd0s6.j ;z4o 69gxo0+su4cu vrevd v, uxtxh)q by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table 2 2mczqhc-ti*zs : og.top. When viewed from above, the current moves aroundg2h2czq -izot:mc s .* the loop in 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 magnetic field is theu,3 .np2sj +ffrj. tsr;8:dzlgkbz b:

  1 T is equivalent tozp, 2 7bnkgfz j1i*pu311oqqo

  The direction of the force on a current-carrying wire i0l x)jvh9aytzvn8* 6tn a magnetic field is described by which of t*86 yv tjtxzna90lv) hhe following?

  The force on a current-carrying wire in a magnetico ) .gfx6jllx, field is the strongest when

  The force on a current-cfas 0-;aar5t harrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the m2q20a y-d tlbvagnetic field vector poy-l0qbt 22da vints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forceu .5k)rdjwb+s . From this we can conclude5dkjw+. u)rs b that

  A charged particle moves with a constant speed through a regi*wz-r1 h wi:mxon where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximuh1 r*w:mxwiz -m when the particle moves

  A charged particle moves across a constant mago;o9- ( e pqy0bbaf(benetic field. The magnetic force on this paq (b ;e9 oeaf-(obyp0brticle

  A charged particle is injected into a uniformjr ;i +6tcz a046h;ymkajw+*mi.tf tw magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,6tzmjctrkt0 f;;myw.ji aw +4*6ah + i the particle will

  A charged particle is observed traveling in a circular path in a uniform magnjr3cn*boq)6 y;b2 ou (w -jzuyetic field. If thoc2 )o*(3 jr6q yubnwu -;jbzye particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a ctw+is e,eu0su(8f2o dharge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a chargefdwsue( u se8,t02i o+ of +2e, the radius of the circular path would have been

  At a particular instant, an ele5 -w/tvfrlu m;b*x*swctron moves eastward at speed V in a uniform magnetic field that is directe /;ufxv-rs5lw t* mbw*d straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to xff ,+3,k wp3gzq5nrb the south but is observed to curve upward as the result of a magnetic field. Thexb,grz5,33f k pq+nf w direction of the magnetic field is

  An electron moving along the +x axis enq)(mno uqyt(:* o 4frgters a region where there is a uniform magnetic field in the +y direction. What is the dq*o(m:t)fyr u4ong( qirection of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field prod. 6 ()hdrxfliouced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wirz5hk*,v sf k:me, the strength of the magnetic field produced by ,sz *5fk:mvhk that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal 8)ro2c wwij:xtable carry identical 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 pwo ijx8)2 w:rcoint 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 table c;*2w,dtr (9lwu qp mbzarry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two w muq*bdw (ptw;l29, rzires

  Two long parallel wires carry equal currents. Thsd8o-+k8 fvwf e magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new8-sf d8k +wvfo force between the two wires?

  A long straight wire carries current toward the east. A p1 4o kz1dox2m1v-zs60bdq +vk oudoy:roton moves toward the east alongside and just d16dzs0dv 1o ux:k2-4+ ybqzov k1 omosouth 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 bottzpfkm3vp 4m*w9p :rf*om of the page. What is the direction of the magnetic force it produces on an electron that is mowfp:v9 z*m*k 3f rp4pmving 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. If the 5w*el v6 d5(qnbt ko:/ qplpy39ejhx6wires carry current in the btdwelxpnqk:heqy6 3 59(*j/65v ol psame direction,

  Two long parallel wires are placed side-by/ w0 dqbkd1k0v-side on a horizontal table. If the wires carry current in oppowvkddbqk0 1 0/site directions,

  Consider two current-carrying circular loops. Both are made from one strany x.,8oh4 olzqd 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 smaller loop, the magnetic field at the centerhol 8x. oq4,yz of the larger loop is

  Consider two current-carrying circular loop z 6v(uhq, 8l6(fqwq *sjfpm7zs. 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 thejv*zfhqf 8p (76uqw s(6mqzl, magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cuy)*mqz l9 qw3mrrent carrying loop occurs when the angle between the loop's magnetic moment a)m 3wlqzy qm9*nd the magnetic field vector is

  When placed askew in a magnetic field, a current carrying l8 )nhv+um) 9yde vyiv(oop that is free to rotate in any ev+n)d( u8vhvi9yym) direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essulcr /d6a9c6r a7ofn;entially all electric motors?a r6d cr uc/;lan67o9f

  A circular wire loop lies in a horizontah*en1w1 vnpns/ yk1 60dbm8iul 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 nor1m8nbw n/0v1yp1 se6k *unhd ith 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 m d/,o2l*fdxxmass m and charge q is accelerated through a potential differencel dom/*d ,2xxf 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 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 particlo ,mn+ d(dax5e :k-gxne passing through crossed electric and magnetic fields. The forces exerted by these fields are in opp+x :kx n,edn5-mgd( oaosite 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 paralljfsx9fi .)8dy el to a uniform magnetic fij xi9sy) d8f.feld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofb6yy(;pk-;rmwx eig : 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 wir/14*js xaag tge carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire maa1s j4*x/taggkes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long ha kgi;0l01j sg /dd3((vjm0oiv o5ypw ms 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 w0m( g;dlm3w /(0 ivgiv1do sk y0pjoj5eight of the rod?

  A stationary proton is in a uniform magnetic field ow(z .owl1.ocz8 jbzn41fuii2 f 0.20 T. What is the magnitude of the magneticn 1izo28j.41u w.b loif (zwzc 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 ii5 ndlls +91sa 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 5ywew u z1klshdo, /l z1-fa0)a 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 with sped l 3b5fwtw1bo(:u2usnt.vs9 ed $4.0 \times 10^5 \; m/s$ 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 wiq-oasauxj :,fo7z -7 jkni 65qth 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 2b6e,id*) ;hg uf /tbtlv1rgqa 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 r-/yto0nq* zx $3.0 \times 10^6 \; m/s$ 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 z-x9 q)z6u7izlhmto 1current of 25 A. What is the magnitude of the ma ltz76xqzhoz u-)i9m1gnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the grgm6 peq75zwc( ound, 10 m (w67zcm eqpg5 away?

  How much current must flow fot7jm zj e47ksj3m02fohn j1d,r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.yz8gmq(oytp(bc 7.kpthbv,5ut 5 l) 30 A is the magnitude of the magnetic field due to the wire equal to the strength of the b( pup5qy3().,ttty z58cogmbkvl 7 hEarth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A inh *)n; e4y 3ns1* jpoas8vn5g:ulrk sv opposite directions. They are separated by 40 cm. What is the ma8pgk* sonve s :urly);j vsn 14n53h*agnetic 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 20 A and 5.0 A in opposite directionsd j:- q9p9 zuxjzerb4a3,:evg. The wires are separated by 0.20 m. What is the magnetic field midway bev:,q d3r:u b-pg9e94z jezajxtween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directionac xfmiuk 6(36s. The wires are separated (m 6axick 36fuby 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires eacpp;8fsf rls7. h carry 2.0 A in the same direction. They are parallel to the z-.f s p;pfrl78saxis, and they pass through the corners of a 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 8.0 A i;j 7vbw5a,lk dn the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit lengjkaw5,; dv7bl th between the two wires.

  What is the magnetic field at the center of a cir+ dvth vlea5**cular loop of wire of radius 4.0 cm when a cu+5lhv *d *tevarrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tu8 /ju. zlin7n5*ind4jm)2yr8 ergce srns of wire. What magnetic field is produced at the center of thmj/nzsejy5un r)82ei 8n crg*d 7i4 l.e solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10c .kg/ 53q zzcsd,bmt* m long and carries a current of 4.0 A. What strength of magnetic field will it havezz q3sm/kd.g ,tcb5c* at its center?

  How much current must pa 0:oas -)tikafvalut0kw //, j+cnj6wss through a 400 turn coil 4.0 cm long to generate a 1.0-T0wws /u) iv+cn,al:aj kfktt/0-o6 ja magnetic field at the center?

  How many turns should a 10-cm lo75 bed.24u7jz eqfgwcng solenoid 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 rectangular loop u6a**b59iach htmt4j of 120 turns that carries 6.0 A if its dimensions are 4.0 cm*6tjh c 9utab ima45*h x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fisr ;di z - 0.xje+a5gg9shlwd*eld 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 perpendicular to the maxihl*j+s wdr5z 0d-e .;ga9sggnetic field?

  A circular loop of wire of cr lzkk58 /:)rv 2gf)c6mrmhmgxoss-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 curs,rs ()jg9 lajrent of 2.0 A is in a magnetic field of 3.5 T. The loop ss,(jj rg)la 9has 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 lvahqx /.;-dz.50 m is in a uniform magnetic field of 0.30 T. lx /d-;.a vhqz The 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 raouf,6nrt v44rz -hrb ni;a08adius 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 magnetic torque when the plane of the loop is pararrfavn r4 zhu4-i860 ;,nbt oallel to the magnetic field?

  A circular wire loop oflgsps c zu )c,;t;(p/(i.cj qf 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 singl1l3u xe60:6 pyqw:n b1xu tjzpxps13de-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 velocityd1lx2pl k;2 pf $6.9 \times 10^6 \; m/s$ 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 ay/gz77*i7njheih s i / potential of 1.0 kV and then moves into a magnetic field of 0* n 7s/iih7jig7eyhz/.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fisf )pz:x w0hz)ol :za;eld of 0.3z:x0soz: ) wl fhzp;a)0 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons ishp/.5i+2ch+mrtu i g4 ebdn :a accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a vag cb4+ ti.hedmh u/2+5i:pran lue of 0.010 T, what value of the E-field is required if the particles are to be undeflected?