If the north poles of t:7/r ,d9u mbsc;7c jngox -j3ybwu e,wwo bar magnets are brought close to each other, the magne3 x -;mbwcjcy9,ug/ude7o:nrs b7,w jts will

  If the south pole of one bar magnegrg fjsa7vj9 wg7(1 0jt is brought near the north pole of a second bar magnet, the two7gfva gjr7s 1j g90wj( magnets will

  If a bar magnet is divides(w2m +n5u-h : amvzqzd into two equal pieces,

  The Earth's geographic Nortap3 q zr.54l;bli3ysgh Pole is magnetically a

  The south pole of a magnet points toward the Earv08jduegp90w 096b agd lsm r*th's

  An electric current p/9zu s3mg ,7cfjpbqh9 ac*(r eroduces

  Which of the following ;zfi,5fbw;xyx o :1xiyy:k; wis correct?

  A vertical wire carries a current straight down. To the eastabvd23c0q pb0 of this wire, the magnetic field point00vap2qb3cdb s

  A horizontal wire carries a current straight toward you. From yo, -di t-k 3pp4ir4z1zcqek4ja ur point of view, the magnetic fieqz kte1,-r4 4iacd-ppiz3j4kld caused by this current

  A current carrying loop of 8 7x1cwsa7wy-pqkjhj fj) )3zwire lies 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, o7j18p 7sk )wfxjj-yz)wq c3ahutside the loop? The magnetic field

  A current carrying circulg/e0 )tmfz/d;utl ax/ar loop of wire lies 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 the loop? The magalu0t );/tgf z//xdmenetic field

  The SI unit of magnetic fiel2m-r p4dx8jzmqgyyqbi3p *0 6d is the

  1 T is equivalent tobhp)m6i (oev9,ds3p j

  The direction of the force on a current-carryrn;pzmb6ka ,; ot .55rb;ph lhing wire in a magnetic field is described5h;r rppn 5mlzt.kbh,a;6b o; by which of the following?

  The force on a current-carrying wire in a magnetic field is the strtq;1/m7c 0pm c vqq+h.cmag e4d9c)lu ongest when

  The force on a curren;tp zuj8rx5: et-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current : j85tnttf nh35f,,rxomab- cstraight up in a region where the magnetic field vector points due north. What is the direction of the tbt3ojn -,xm5nch,tr8f :5 afresulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we,c4 u/ : 8n;-jbjogcj ( nsvw,xtkiz9q can concludw-z jg4 (:xv n/ c9jcsi,o b;nktq8uj,e that

  A charged particle moves with a + :l;j y oyky1*ccqx3:ngu7fbconstant speed through a region where a uniform magnetic field is present. If the uo c3:*:7ybcgfy;1 xjylkq +nmagnetic 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 magnetic field. The m ai1dkvkw. 0:z2okcd-agnetic force on this part kd 0zi12vadk:k-.ow cicle

  A charged particle is injected into a uniform magnetic field such that ida 94i2;mem sw rt* 00rlo zthu8bvh;)ts velocity vector is perpendicular to the magnetic field vector. Ignorin 0 z;0udre*8to hrv9bswmhm2;a)4tl ig the particle's weight, the particle will

  A charged particle is observed traveling in a cirgzy,3i6xqnj,zg6kz t y03 z, ycular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would y3z36gk 0zz tg, 6yizyjx,,qn be

  A particle carrying a charge of +e travels in a circular path in a unifoe(yd)wxc)d xq5 vb 49 vyw+bkt94p- narm magnetic field. If instead the particle carryex k9tnba( dyp9 4vv- 4cwx)bdq5 +)wied a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves ef/5/bvt7gul ta i0k6ztbx)/gba(j 5dastward at speed V in a uniform magnetic field that is directed sjigtt l)5 xbk0 7/6(ut5gbafbv/zad/traight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve u l0lzjhfu0t0zs,2 pq0 t31 deg2+vau l 3)wvippward as the result of a magnetic field. The direction of the magnetic field isdhl t02 02p)a3sf jt3u0elvpiqzg+0 1lzu,wv

  An electron moving along the +x axis enters a region wher d3ze*.nyirao sp**f( e there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the e i*a.eyn 3zdop(*fs*rlectron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced;zjvoh 01+aw/i9av gm by a long straight current-carrying wire is

  At double the distance from a long cua 4o+ z77hf jwimsf*b)rrent-carrying wire, the strength of the magnetic fieldb* m7azwf)7j +sfih4o produced by that wire decreases to

  Two long parallel wires placed side-by-side o lr/d24ich5exn a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carr rh2ei4xl/dc5ies 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 hor1m9kie )pk42yo 2d.c a)wmmaf izontal table carry identical current straight towardcwmdim 4)a)9o k2ke1 fpam2.y you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires ca.rb 5tfc*/tct rry equal currents. The magnitude of the force between the wires is F. The cur b f/*ct.t5tcrrent 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 ti ef68we dvt2tz+h* 1ehe east. A proton moves toward the east alongside and just south of the wire. What i*8vehd+wfe6tze1 t 2is the direction of the force on the proton?

  A wire lying in the plane of the page carriecjxny ( +v6tf-s a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpend6fn+xy-t( cv jicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-x5n 9vp2 z4hx8vh x3eqby-side on a horizontal table. If the wires carry current in the saxxqxp8h 3ve29z vn45h me direction,

  Two long parallel wires are placed side-by-side on a horizontal table.;zculma5yj -+ qni+:u If the wires ca+;n cl:myqz -jiu u+5arry current in opposite directions,

  Consider two current-carrying circular loop k1m8q,/ lmplps. 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 smaller loop, thp8ml 1/kqpml, e magnetic field at the center of the larger loop is

  Consider two current-carrying circular loopvq 8 ovh h1b;a-pa 72:onkkwvgtzh:5f, kkk ,6s. Both are made from one strand of wire and botha1vhvkn75bak v 6, ;wgz-ph8,:k :kqho2tof k carry the same current, but one has twice the radius of the other. Compared 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 when1si/;m kx* lvz the angle between the loop's s/ vmx ;k1zi*lmagnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a curren vz0: qh gmv i-74)erst,,yxzn.wq+o bt carrying loop that is free to rotat)t+ n gszw0.-rmv:zy,qx,47 e hobvq ie in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially 6sy1/0m ig1e mv 2fsmrall electric motors?s6im ver sy0m1gm2f /1

  A circular wire loop lies in a horizonl-:prc tb* jx.tal 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 north and dips below the horizontaxj cblr-.p t*:l. 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 accelerated throug8xklxsgn85aq 8 * 7j/tzxj8 sgh a potential difference V and allowed to enter a magnetl88njjqs5x 7xkax ggz*8s /t8 ic 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 chaxtzs7kebm7 ifw07 o41 rged particle passing through crossed electric and magnetic fields. The forces ex t sefkxwo77b4m1 z07ierted 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 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 a unixabi 0eeod n8 kn:l+rtzm*3 -8form magnetic fieldintm xd:ke*b+z3 8-rn0 la8eo of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction + +oq6;7pf d)sfv vvpc-)yejl/v nbx;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 car2e b,g:3y3x2leytku pbiqegf .up9 88rying 5.0 A when it is placed in a magnetic field of 0.020 T? ,3.8eieb p:2uuye 3lk9g btqf2p8yg xThe 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 jku48o k yj)dw27bij7of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod k do4u2jkyb 7 8w)jj7iis needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a u)ibiok(; (hr3x)+sl kn(s kywniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the pr) yk)wi (srlnhk;oibs( ( x+k3oton?

  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 s3zoq5gq1/ ah g1a q6jbln.yl1peed 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 a s8ebud-r.p m+s o-p4jok) e5*/h isqnq 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 dkbp 0z)kw(bm -saq7z:ue north 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 spep 1lfkm z n5fbx27f17hno/w) ted 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 speed ofwyfsdy)u.d9 h1z7m yo ,ejj j+ cw3*b. $8.0 \times 10^6 \; m/s$ 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 3kv 9uhm1 5qme 62(pkv)d uzkw$3.0 \times 10^6 \; m/s$ 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 me xhiz1 04f8dA. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?xfdez10m ih8 4

  A high power line carrying 1000 A generatq whway:f p sfmw/ w21b+9k3k8es what magnetic field at the ground, 10 m awak+21wsw9/y fwfa w8qbph:mk 3 y?

  How much current must flowh9o - 5rl2dgjj 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 strai6s izyebx3nl*w fo,9 55 f7oxoght wire carrying a current of 5.0 A is the magnitude ofwxoi7f os,l5n6 o9 yf3bz*e5x 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 opprs()mr8 qk8bm osite directions. They are separatm88 rm k)sqbr(ed 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 the other?

  Two long parallel wires carry currentsvx:+plpu w 0y5 of 20 A and 5.0 A in opposite directions. v p5:lwx p+0uyThe wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 4j7f5q j5hvq1kyf c;w 20 A and 5.0 A in opposite directions. The wires are separated by 0.20vjfw5cjk 7 1q4qyfh;5 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 sg34nf u9use6A 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 magnetic field does one oeug9 sfus6n 43f the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and8qf : )/xm lgreq;)vuk 8.0 A in the opposite direction. The wiresqf/ rvgx e8)m)lk;u:q are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the centea5isez,kpz0zi(- vn ca 5iihu2,ad7 4r of a circular loop of wire of radius 4.0 cm when a current sak c4a vazi(,n2iz, 7z-5ihu5 pe0diof 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field if xp me4j,+8sjs produced at the center of the solenoid when xs4pmej,+j8 f a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Whati7i nxc- +l2vmw )vd:l stre-l vlnc m xiw)72div+:ngth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generam6o 1)caqi j-mte a 1.0-T ma6qic ojm a)1m-gnetic field at the center?

  How many turns should a 10-cm longo d3tzn:fomy)5z yewz97gx 4( 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 lbz.*f(b hrucuq 8)e/loop of 120 turns that carries 6.0 A if itb(/qur ec8 bfz.* )luhs dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneu3wn ;rq)/rma ge) x7g.taa-g,i c ta0tic 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 perpendicular toti3)gq/7re nawxg.0mugac;-r a) a,t the magnetic field?

  A circular loop of wire of cross-secttmx t04xb:cb 46 f*gwip0u 9gyional 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 fiegp6n*9u* ajl3tkwbv4 ld of 3.5 T. The lgnp**lka t6j9 3wbv u4oop 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 field of 0.307c e5)kzdj -uc T. 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 dz) u7e5cjck- field?

  A circular loop of wire of radius 0.50 m is in a ud ixj)w( ekv.a+gc2)q niform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetk2c)( xdj)e agiw+.vq ic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ojb ofj79, 2gh9fj :yvkf 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, ad bz-ncrfz .0cw2t57k9lk)mstcf3 - ) qi xj:f 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 velociq tex0xbv):)ee48eh79 ckgg q ty $6.9 \times 10^6 \; m/s$ 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 1.0 kVi3il+ 38p0cq*vm/gwkfvp)u )th 6t nr and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting v r/ 0 h8g*cq6tvpwmlfk33ii tp))+unorbit?

  A proton is accelerated from rest through 500 V. It enters a maghtd989pt: :j sc5tl9j nwg j3vnetic field of 0.30 T oriented perpendicular to its direc ntj9p gvtl8t9:jhd 35js9wc: tion of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference os9 c(jiw ,al( .d(ne boui,*;dzb ;pwbf 10 kV before entering 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 aesb(jl.ud*(pn ;w;ocz b,i9(idb, wrequired if the particles are to be undeflected?