If the north poles of two bar magnets are brought hwrc yy;m7z18 close to each other, the magnets wilw;1rmy ych8z7 l

  If the south pole of one bar magnet is brought near the north pole ofe*5 hg9/o z+bme8imc7wy ya/ y a second bar magnet, the two magnetsb y homyyg/7 /8+e*5am9zicwe will

  If a bar magnet is divided incrnz( - 2i,uycto two equal pieces,

  The Earth's geographic North Pole is magnetically a,els8;y6lzdg

  The south pole of a magngw pn52 e4yot.w5 yv3tet points toward the Earth's

  An electric current produeh3 oxh6lk 3j5ces

  Which of the following is corn; ,nj9 zlm8smrect?

  A vertical wire carries a current straight down. To the east of this wire, tho .cl5l1jmo)b ky8ol0e magnetic field j1)b.o olmc5 8o0ll ykpoints

  A horizontal wire carries a current straight toward you. From your point of v gaz j7/m(ni3q*/ fktrlfa:9w z*zu8kiew, the magnetic field gfj(3 u:km9 anfltr z/7k*/ia8z*wqz caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed fromt, zyx ozs+ .9k8,ajph9wg5uh above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field causedw h5 ,yh9 .+9k,s xojatzzgpu8 by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat ognsq ae8; sd)2n 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 ass) 2de ;n8gqthis current, inside the loop? The magnetic field

  The SI unit of magnetic field is ch7m +5ngk j(nthe

  1 T is equivalent tomb .kg -ouv;3h8i+rth

  The direction of the force on a current-carrying wirei/3my/lo.ihbp+ a i1p in a magnetic field is described by which of the followymhb.+ p/a/o iliip1 3ing?

  The force on a current-carrying wire in a magnetic field is the strongest whe :j3tasc m)*rzw8 dlpf7fu8h0 n

  The force on a current-carrying wire in a magnet( :0uyju. o7fnuxubu 9ic field is equal to zero when

  A vertical wire carries a current straight up in a region wher1pxstsp*x 52i e the magnetic field vector points due north. What is the direction of the resulting for25ptxxs p* 1isce on this current?

  A charged particle moves kjrjc bl 37ihpa*/yt+l3uu9 0 and experiences no magnetic force. From this we can conclude th3u/7yu3hrltj9kp+b ai j*c0lat

  A charged particle moves with a constant speed through a region where a uniform:/( tif*h 5pwtkf .bsj magnetic field is present. If the * jt/tf.:5sipf hkw( bmagnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves8q-npus5 s 1r3vt0 dks across a constant magnetic field. The magnetic force on this r05 dq- ntpv s3sk1su8particle

  A charged particle is injecl-/lym(hoy e6d,rd0bted into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the y e,dboy6lm/-h0d(lr particle will

  A charged particle is observed traveling in a circular path in a uza5b+ 6oj)cxug2irbvj)88 c m niform magneticr)6+caj8 gcoj uvz2b)ix5mb 8 field. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a unifok y ; )tnc/ws rio1/lre:,0vitrm magnetic field. If instead the particle carried a charge of +2eskr tc1)0; ii:tn//yol, rwev, the radius of the circular path would have been

  At a particular instant, an electron moves eastwa1echnhb /z i7k.:itgz yu7jd 06b+b1jrd at speed V in a uniform magnetic field that is directed straight downward. The magnzj16d yhj b71zbiku /b+gn.:hei c0t7etic force that acts on it is

  An electron has an initial velocity to the south but is observed to qb2i .gd (9fsmcurve upward as the result of a magnetic field. The direction of the magnetic ff id9(q .mgb2sield is

  An electron moving along the +x axis enters w35jh.j xu,bv a region where there is a uniform magnetic field in the +y direction. What is the direction of tj3bxjhuw.,5 v he magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field producedhf ;n wkw+9slw ji(7 eh5l5x/e by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mal8z5imbz4xkdx1jg wd)ej 9. 4gnetic field produced by thakjwx48d5z m41x ).ijezbdg l 9t wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table cark94 sv5y/5 0lahyy ekwry identical size currents in opposite directions. The wire on your right carr9kya40ke /y5 5 hwlsyvies 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 horizontu(na ex 1gf(2wal table carry identical current straight toew1 xfa( n(2ugward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. Thh7: xvb(b42r v ylkmd1e magnitude of the force between the wires is F. The current in each wire is now doubled.(yv71lmr hdkbb: v 24x What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A;oo )m k 1 fbybowk6a1f*tjd35 proton moves toward the ea) fo1 mj63wdaoyk1kft5b;*bost alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the 3uq4 nwfte. k7if27v 8n*fxs dplane of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpeni.2fqn dv47*ef 7tfx8k3 uwsn dicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are p):qvn(zuo9 ldhcxdf43(eqp*p; y s, a laced side-by-side on a horizontal table. If the wires)3sdc:*n(e9y pq alvqfd, z4x;op (hu carry current in the same direction,

  Two long parallel wires are place l;.-a+ nnankqd side-by-side on a horizontal table. If the wires carry current in opposite dir - an+.nal;nkqections,

  Consider two current-carrying circular loops. Both are made from on/y-fgm +8,kbjj y 6 /rmq3jdjle strand of wire and both carry the same cy6- ykj,bjml g/8 fdjrmj/q3+urrent, 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-carrying5bulx1.h 2bwq)zl uu, circular loops. Both are made from one strand of wire an,u5 u1b.2 lqb)huzlwxd both 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 when the angle bavc94gm9rc u;)-cgt kn s8m 0qetween the loukcnc)4 vg8m-90; gcqtrs9 maop's magnetic moment and the magnetic field vector is

  When placed askew in a magneti 8pkjnuc4l( wak )o6n;c field, a current carrying loop that is free to rotate in any direction will experience a townuo68;l)nk (4kjcpa rque until its magnetic moment vector

  What fundamental fact underlies the opera+xih3 x 7kqw hh:1zbq(32q zpgtion of essentially all electric motors?wqhg2xh 1p3z:7z i3k+qbh xq (

  A circular wire loop lies in a horizontal plane on a table and carries currc7 .8be70dsts. tpqoeent 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. .eeb 7odcs7.0tp 8sqtWhich 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 and3x o.7f,d7 yckojl q1u06ivut charge q is accelerated through a potential difference V and allowed to enter.yvt0oc1di l xuk36fj7q o u,7 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 4a/q1pc r 9-axt 2o6bhpne9hejiwm6/ofk9*hof 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 straight line. In the following, disregard the magnitudes of the fiehe96woh*eakm 1x/pn/9o 9ir h qc2-b4p6jfatlds. 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 parallee0pw/hr0ggz *-ot9kr, if68n)(1 zgpv c zytyl to a uniform magnetic f0 rfeocwr9t )6v0i*,-p/ty8kzzg yh1pgn g (zield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a di*y y6 dtc- qkpze;e,rjs57.bakl:j8 xrection 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 perm( mc1xu:epkvaj9.a 1 q5h+o k meter on a straight wire carrying 5.0 A when it is placed in a magnetic kcm5ju.o:h(q9pvm+1axa 1k efield of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.wxgv+lz8 r8m.u2 :gmjwke43l 0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum cu 8m3lwgem uk2.vx8rwzj +:4g lrrent in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in nx.6p gw w8x*ta uniform magnetic field of 0.20 T. What is the magnitude of the magneticpg*6t8x.n xww 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 a speed ow )m/:bmsl1cx*(os )yswx-q 5et jkk2f $5.0 \times 10^4 \; m/s$ 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 speede /l6+x+r jkq(d.kxv j 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 f 5nvucg*m6e 6o5 lxy9north 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)2iqnky1cfwp.10msek87bxq g ir6 + f 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 s2 to8p f5o7skkpeed 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 ofqm a8r,yo 8h1wf14 vy3vtanm9e-:agm $3.0 \times 10^6 \; m/s$ 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. What is the magnic72xdi1 -hf+hxs o6 dqtude of the mai7hf+xd s-2dh1cqo x 6gnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fiena5ekpn9 ,9p jld at the ground, 10 e 5,appnnk9j9m away?

  How much current must fnkq c gjc ivtwq0(mk.84(6 h:glow 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 str86jcqwk(k (/ fddpwjf *vr w++aight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength ojvcdd w+(jwpfr q6kk8/*+(fw f the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 7adcph j+keb;x33g s;ga b15zA in opposite directions. They are separated by 40 cm. Whaa1pg5 ;s3c3 +d ;bj khxbaz7get 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 anw6n sf6w.zicb7; cdb+n23 nqrhq3j* g d 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the 62;+wncrbbnsqd*j n c 6if7.w3 3hqgz two wires?

  Two long parallel wires carryq.qj hny8m :s( currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At wh8jhnsq mq.(: yat 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 sy 6g3,fm r:gdke8y 4 tx,.edteame direction. They are parallel to the z-axis, and they pass through the corners of a square of tr. fe,38 :emyy,dtg4dxg 6 keside 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 oy 5po *+3rz 7ohz cuy,r5p2hg+4diq x5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnet hcqozy*zogd,hrip2 x+o+5pu7543yric force per unit length between the two wires.

  What is the magnetic fiel7rd,,4c;bymgt xe 2vk9w ka*id at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows id,e4gkc;*k miyv79xw, trb2a n the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magneticz- :wocorj ev3r6h,a 1ajy:b - field is producedbeao,6h1zjr--arcw oj: y v 3: at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carris0ou2si6dby(x xd w) (es a current of 4.0 A. What strength of magnetic fied(s 2(ysd)xbwi u6x o0ld will it have at its center?

  How much current must passr n63; 6pb.q.m :5mx imhzcls k)ttwa8 through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the53l 8z tcxbarm)mk. sp6wmn ihq:6.;t center?

  How many turns should a 10-cm long solenoiu oz4s9u7v h+kkzur2v qs::p;d 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 loop319w-ej tc jht of 120 turns that carries 6.0 A if its dimensions are 4.0 cm t9c h3wj-1jetx 8.0 cm?

  A circular loop of wire of radius 0.5.w om5szey5e sr *4c;k0 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 perpendicular to the magneti5mery we.; k 4cszs*5oc field?

  A circular loop of wire of cross-s5x+1 uv) ikx2;uimi qfectional 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 kv7mac y87m)ua- 5ia n2.0 A is in a magnetic field of 3.5 T. The loop has an areu 7 8a7aim5kn-amcv)ya 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 fieldyc+vwfjt *h6wh45b hh+x*rk. 3 7ekqc of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of tj53hwkw*ehrch qxcv 7+ .6 fkhy* +bt4he loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 p1 zk9dkwg4elh;u xmcx ,694m m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magneti;egx , xc6 49kmklu4dwph1zm9 c torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of 0+0p kzd;ae ecarea $0.25 \; m^{2}$ 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 s, /qe0elik pt1ingle-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 tec 73-tfsg e,jg:v-b4xx gs*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 porrf i9nsxuln)t *q(be / *6z3vtential of 1.0 kV and then moves into a magnetic fin vnr9 u3(frlt)es */bz6q*xield of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from /3 yu1loi;- m i(50rq/0cmjstj5molslpt;m krest through 500 V. It enters a magnetic field of 0.30 T oriented perpe 35rqpu-stjsl 5m0o m/c0 y; 1jim(;itlom/klndicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated th n7sggl+vgegq5o)j )p2bng1 e d1wr79rough a potential difference of 10 kV before entering a velocity selector. If the B-fien+7gg91g2b5ljoe e)pdw qvgrns g7 )1ld 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?