If the north poles of two bar magnets are brought close to each other, t.coorj wl3: x66tnl5hhe magnets willo36 6twoc :x5jhn .lrl

  If the south pole of a.xc(zxai f 9 )we5 *83jywxccone bar magnet is brought near the north pole of a second bar magnet, the two maea wxx8fc zyx(9.ccj)*53iaw gnets will

  If a bar magnet is divided into two equa73cjajm r v.ps9boum:z 59x 9ul pieces,

  The Earth's geographic North Pole is magneti uo(-*ap dgbh wh1roe.8qm. f5cally a

  The south pole of a magnet points toward the Eartht3e6+ kg tifaszfx6 7-'s

  An electric current produc:k4lp7n1rcsjg.f *vjk(rf(95 l mbo d8 x; sydes

  Which of the following is co-mm r /ajcg5j-cn47kurrect?

  A vertical wire carries a current straight down. To the efs kwhoz:(8 4mast of this wire, the magnetic field posh:z(4wmf ko 8ints

  A horizontal wire carries a cury13 rgg46 d2mf:bwfqbrent straight toward you. From your point of view, the magnetic field caused byrqymdf:g 1bb3 w264gf this current

  A current carrying loop of wire lies flat on a table top. Whenv)4w au 9 4ejx tw6x5bx)afr5m 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? Th) 4awuwxavxr5 x9btfj64)e m5 e magnetic field

  A current carrying circular loop of wire lies flat on a tab.i,ruyf sgp /xa+ p4m1le 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, i. pfg s+4/xam,rip uy1nside the loop? The magnetic field

  The SI unit of magnetic field is tan oc7/d(n5 znt du96rrj-x ;ihe

  1 T is equivalent tor)iz2nx/hh)5,t yd hohe)p y6

  The direction of the force on a current-carrying wire in a magnetic field is d,7cjzoi5i 49jel wcq-7v)sbntw u q/3escri)5/7luj9bci e-i7j czw 3q nvt4q s,owbed by which of the following?

  The force on a current-carrying wire in a magnetic field i.qvgpch: y .oq/qv0iy:2+uq ls the strongest when

  The force on a current-carrying73k5rs8 bcj)f d keq4i wire in a magnetic field is equal to zero when

  A vertical wire carries a cur))m:gu,hrerv a sr4 v) c3xj:frent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this currenfrmgr)vj:ca, uv)ehx4sr: 3) t?

  A charged particle moves and experienyv .eciho9ng+x r g/8;ces no magnetic force. From this we can conclude thx + y9 ie8ong.rch;/vgat

  A charged particle moves with a constant speed through a region where a uni, 0tlg/gh 1bjsform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle mos,/b glt1jh0g ves

  A charged particle moves across a co61)5n cxdnkss lo.a0lm; mp,vnstant magnetic field. The magnetic force on this partimso. d6 p5 vs 0xalmc1n,)l;kncle

  A charged particle is injected into a uniform magnetic field nv g9h;e+kc2 ci1l;*pwjv d3xsuch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particl+391 ncwi 2;jlp;dve* hckx vge's weight, the particle will

  A charged particle is observedbk3 q)hfvet 7di;7p:7wu .3 qr;wplxr traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular 7pkhbw.77qx 3)r3l;d i:fw;epqvu trpath would be

  A particle carrying a charge of +e travels in a circular path in a uniform magn9 *3egt 0on:bbd c/h 1sn 0e9of.xrztketic field. If instead the particle carried a charge of +2e, the radius of td * :t0bt0e3sxo ./cz1n9okb ge9nfr hhe circular path would have been

  At a particular instant, av vokpm3g(fy2/ko .-an electron moves eastward at speed V in a uniform magnetic field that is directed straightvpkgm3f- /ky(o .oav2 downward. The magnetic force that acts on it is

  An electron has an initial ve-ez. 9q)qlhez locity to the south but is observed to curve upward as the result of a.-ze 9)lqqehz magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unif rzr2crb5nqdgsj/t3(yw- /5q. 9 f tqtorm magnetic field95trg(tc q/bqnqf r/ d25rtz wsyj.-3 in the +y direction. 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-carrying )kbbx2t zi)o- wire is

  At double the distanc /o*ykrsr0dvd63ol o: e from a long current-carrying wire, the strength of the magnetic field produok/0 od6 do:vs*rlr3 yced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table car6 y((k8vh3v3s xnv*s 3 :1nevjvpj xkfry 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 point of view, the magnetic field at the point exactly midway between tn1jkhp(3vv(xjse 3s 3v 6:k *vfvynx 8he two wires

  Two long parallel wires placed side-by-side on a horizon)2 ayd w ,.tq.razgt6btal table carry identical current straight toward you. From your point of view, the magnetic field at th2t .bazygr)6.t, awdqe point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bx s j5 j8ibzm2x6qej613t,7eitvx1i qetween the wires is F. The current in each wire is now doubled. What is the magnitude of the news,jzi i ix3 861e6et51qxqv 2bj7xjtm force between the two wires?

  A long straight wire carries current toward the east. A protfoauo74 k6br0l1h t 9lon moves toward the east alongside and just south of the wire. What fhkt 60 14abrol9ulo7 is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom obuq) 0t 3()h*up/qcp -vi9h0en.8 cpgxctdcdf the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the epn0)c -.c bphd)vd cuxt9 0*ug 83p/t(qihqcwire, also in the plane of the page, from your right?

  Two long parallel wires are 1v*gl-3u :rybutodo,f wx92 oplaced side-by-side on a horizontal table. If the wires ca29-x,yw uou lorvg1o:t3*fd brry current in the same direction,

  Two long parallel wire+c. koddjs*k.u3 v rztsj7;l) s are placed side-by-side on a horizontal table. If the wiresuvssdj+)lk*t oz.3j.rc; dk7 carry current in opposite directions,

  Consider two current-carrying c*m-u t4lgt8 l duam*-/ 8krwnaircular loops. Both are made from one strand of wire a*ua t*8mg kn-d-8m/4 llurtwa nd 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 center of the larger loop is

  Consider two current-carrying circula+3t5 lgc tqp4jr loops. Both are made from one strand of wire and both carry the same current, but one has twice the radc t5g 34j+ltpqius 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 qgd *p0eoy2.cc66hk3 -xz:dlv , cotcwhen the angle between the loop's magnetic moment and the mak3 d lc0-gco o2cetzv,c .dp* qhy66:xgnetic field vector is

  When placed askew in a magnetic field, a current carrying looprza x8 5mba5p1 that is free to rotate in any direction will experience a torque untar5a85b1x mzp il its magnetic moment vector

  What fundamental fact underlies the opef3uv62yz sc5 lration of essentially all electric motorsuvzclf2y365s ?

  A circular wire loop lies in a horizontal pdg 59 x/pgt0n hapn9t*fe,a9i x(mtn- lane 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 horizontal. Which side of the coil tends to lift off of the table because of the torque caused by 99x*pa 9-tf p0minxtht5d( gne/n,gathe currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accele9/u xq yojt9kdvbf ::/rated through a potential difference 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 yk x/o:uqfjv9 tb /9:dmass of the particle in terms of B, q, V, and R.

  A velocity selector consis+6bkn3-tt leuts of a charged 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 stran6t-b+utkl 3e ight 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 pa6bull)/;lgf z: y,a g7l)jfto a uniform magnetic ;gall,7pflbz) a:gy6 u)f j l/field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 1 kmh*-t, o)gry qs)reA 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 wire carrying 5.0 A when it is plcr6f6tfe kcnp,ow rn2);5* 5fxlu 5ap aced in a magnetic field of 0.020 T? The wire makes an angle of 55 ta ,celkff65w 2*rcrn p;)fp unx6o$27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg4lkzj+29rdd u 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 w4kd juldr2 +9zeight of the rod?

  A stationary proton is in a uniform magnetic fie m u:t5gi-akxhm2qa;7q d m1x*ld of 0.20 T. What is the magnitude of the magnetic forc hamid751xqmxag t2 kq:-m;u*e 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 wit4iy2+xdpz u y)h a 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 a sk cbadfe x2 iywu2;0x.h;p,mi3i1s r*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 speed jwwh c- +wm(5d f.,3qjzy3-f *acrnd j$4.0 \times 10^5 \; m/s$ 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 hxk76o: 4kv9vjzgz2 j $8.0 \times 10^6 \; m/s$ 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 9iteba55sbdl1;5zfe 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 acceleration of the electron.

  A proton has a speed of uwm47,t1 ibwy $3.0 \times 10^6 \; m/s$ 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. Whatgo u5vk)d5l4k is the magnitude of the magnetic field at a distance of 0.15 m fro)k vk 5d54olugm the wire?

  A high power line carrying 1000 A generates 1p* tagz* 3zc+ tdgfvrb1y ./pwhat magnetic field at the ground, 1 zyp gtz31.ap/rvbd+c tf* *1g0 m away?

  How much current must flow fexko, r0kk-(k or $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long ibv5 lwd e; eyj377*vsstraight 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 lijwy;5 bv7s3e7* v deabout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite vqwkx5y/ d 94i(*pqvadirections. They are sepa4 a*d9vpiw qqx (yvk5/rated 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 currents of 20 A and 5.0 A in oppob:e(bf;nzx:u c5gzk0 site directions. The wires are separated by 0.20 m. What is the magnetic field midway0fxz5: bbz; ckgun(e: between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in m, 0zwu5a/n o)ljh5u mopposite directions. The wires are separated by 0.20 m. Aul /m aonm)w50uhz5j,t what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are par,ytl)cygi: w- allel to the z-axis, and they pass through the corners of a square of side 4.0 cm )y , tiycl-:gwpositioned 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 in the opposite direc lcnu4)qz3dbc; g6+h racd+6qtion. The wires are separat 3+) hqb6qacndglz;+cru4d 6 ced by 0.30 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 of ra * kk osv+96zx5jxnms8dius 4.0 cm when a current of 2.0 A fl5x *+ok 6vskmx89zsjnows in the wire?

  A solenoid 20 cm long is wound with 5000 2+ rf fq5 urpouy4)jkob87j9j turns of wire. What magnetic field is prodf4)ro jrfo 7p52 jyqk9 8ujub+uced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0j(odql;o836b lul f4s A. What strength of magnetic fieloljd 3(;o6slqbul4f8 d will it have at its center?

  How much current must pass t 1* t18ipu.ni5wlxdjobee+.ghrough a 400 turn coil 4.0 cm long to generate a 1.0-T magneticed xewu o.*51.8 bp1t+ilgi nj field at the center?

  How many turns should a 10-cm le t(gs: x2olb3ke,y+mong 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 of 120 turns that carrir sz72+p cu(e,f9qibees 6.0 A if its dimensions are 4.0 cm x 8.0 cp q7ceb 9rez+ui s,(2fm?

  A circular loop of wire of ra 9ub 7a:m.y mwfuuyg+.dius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What isuug.mu9 +7ma :bwyy. f the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sesj/+ve q3utd30xg n/o ctional 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 fi)0 ezug99b/rvm mcl*zeld of 3.5 T. The loop has ancvre*9z gb/9u m0 m)lz 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 isyw7(i.q yeefy9+73my mem tu- te z:m- 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 isqw 7my y t- e+-imemze:ef(yy397u.t m parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is j -z 5; -pg6cv7qntjai7y(vkdxr*, nq in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A5nd-r p6 *nyv xq;kj,via7z-gq 7 jtc(. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of c py; u 3;ki/vl8dz/4ulfl2auarea $0.25 \; m^{2}$ 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 speecl;7;;aiwj d 7*-i aoxs gwas/d 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 ::f/he4n4gcg bca;d j 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 through a potential of 1.0 kV and then moves into a 2pv ;,en rp(ppj 5pbg5magnetic field of 0.040 T. What is b 5pr;25,pv(e gnjpppthe radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Iy:x;8 t afu0rg:4i-ne)ktd 74 oik amat enters a magnetic field of 0.30 T orie id4)e7x a;4nrogakuai8 :t:k mytf-0nted perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a pg,1t it* v-iggotential difference of 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 th1tg,vi*- gi tge E-field is required if the particles are to be undeflected?