If the north poles of two bar magnets are brouwn,01bp5k 3x6r s fcmight close to each other, the magnets ipr,b1 k06 f35csmw nxwill

  If the south pole of one bar magnetxae+ dvvb(8 -d is brought near the north pole of a second bar magnet, the tddv b -v8(+xaewo magnets will

  If a bar magnet is dm ylmoq;r.ns. m(s)x4 ivided into two equal pieces,

  The Earth's geographic North Pole is magnetically a3q k7du 0gveheani-)52p:, i*m nes kn

  The south pole of a magnet points toward 5:t 7u7kjjl+htag2djthe Earth's

  An electric current prodtt-fn/h-,*9egeba e f um:ef. uces

  Which of the following f6:a/upzaueat2 l)3t9 q 6wxxis correct?

  A vertical wire carries a current straight down. To the east of thia;iin4j *lf(d)z 3or ts wire, the magnetoz4lr)ndi (i*;f ja3t ic field points

  A horizontal wire carries a current d az; fn1c jt*wn9kraz6 +q5-rw7j l:nstraight toward you. From your point of view, the magnetic field caused bzd-a9 c:5rw zwr16fk+7jqjn*l ;n naty this current

  A current carrying loop of wire lies flat on a table top. When vqh (hio6ym;p5he +a i*iewed from above, the current moves around the loop in a counterclockwishmqep*h i y(;hi56a+oe sense. 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 f9 va,m0l0 pksxrrx:c:lat on a table top. When viewed from above, the current moves aroun :skrmv9a0lx p,x 0cr:d 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 fiekt ry7x e:vi+,mi /hb+ld is the

  1 T is equivalent tom ta+xr9e p:3f-bf-m s

  The direction of the force on a current-carrying wire in a magnetic fivhwrm6d9v g2k ,m46 f773 crgo0h cokteld is described by which of the folvhr ro04mot276kd7 vm3c w6k 9gfcgh,lowing?

  The force on a currentx* vnwm c62zdy:c1fl; -carrying wire in a magnetic field is the strongest when

  The force on a current-caqr4y,r idl 3pj3 4k.jjrrying wire in a magnetic field is equal to zero when

  A vertical wire carries y8.hgpql w/r77m:vgu a current straight up in a region where the magnetic field vector points due northhguwp. qrvg y:8l7m /7. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From tq5z /qv: )ng q*255zt drlqtkohis we can conclude th2k *tn oq lvtd5/qz5qgr5z: q)at

  A charged particle moves with a constant speed through i ro k.:lnh)d5a region where a uniform magnetic field is p) o.ldrn5i :hkresent. If the magnetic 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. *h177;4 exc*vs y mx9woinn ofThe magnetic force on this p oymf7;4vw7*1sx xneo*i9cnharticle

  A charged particle is inje2* x4;puujlleikyxix0xtwja,2m/sz ;4 +w 7 ncted into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring tj/t,* x suawlpy74nl0i xju22iw;xmxe;z4 +khe particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magnet,umuuf8h, a.qic field. If the particle had been travelinmq ,u8hu,auf. g twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels w7h 0 kub1vkls2 3nt0qin a circular path in a uniform magnetic field. If instead the particle carried a charge ofn2l7qu3 s 10hkwt bvk0 +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform magn lvb c0tegvl1rp*-)t 1etic field that is directed straight d1l 1 el-t0) bpvt*crgvownward. The magnetic force that acts on it is

  An electron has an initial velocity to the southvy/sf5 j 2rm+xg9zan: but is observed to curve upward as the result of a magnetic field. y9:/rznj5x mg2fsv+ a The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there9y49)gvtf q21r ypwy y is a uniform magnetic field in the +y direction. What is the direction of th9yw 4rt9y )yg v2qp1yfe magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long stupzz 4,qoy7v0 en5,k)qg+qapraight current-carrying wire is

  At double the distance from a long current-carrying ax nhtbqz+: m((6ieh9wire, the strength of the magnetic fi+ zx6tei((hhab :nm 9qeld produced by that wire decreases to

  Two long parallel wires placed side.erraj pu mm4-h(l -x5-by-side on 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 carries current away from you. From your - h4m5(rleprx -amu j.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 horizontp0g+ lby0su7z :1po iz+ 3idfaal table carry identical current straight toward you. From your point of 10f:70+ls b pd+o 3y azzpigiuview, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of t.16 owbcpq+4 wastn7k he force between the wires is F. The current in16 swot +pw.4bc7n qka each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton m5lz x7qh1qfd z l.+oi9oves toward the e5.zll7+dqhfo q1ixz 9ast alongside and just south 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 bjehw8 + qf+m;.z9l2nv ht(i qrkhi(h 6ottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wv f (w 98m+jh2e+hhq;k.rnqih(z6tliire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-bk:ux +q4,7d6tib / t yxhjk) tyl5o:nsy-side on a horizontal table. If the wires carry current ,4y sjlx:)5 t:+kntiut7xy okb 6qdh/in the same direction,

  Two long parallel wires are placed side-by-side on 8696btt acppe a horizontal table. If the wires e6ctba9 pt6 8pcarry current in opposite directions,

  Consider two current-carfha1-x5qdn tiehhq2z/m m *6o l +y+)nrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twicem/6ed+l1zx qm5ny2nhq h a to)f-+*ih 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 circular loops. Both sv*fxd-5cbo /fig/moyufc0 (48kr 7fare 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 moment of the sm*80cxgf 4(f/k7ucfroyi/vm b-o5dsfaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between thg;a 7x)pfr*bjic e( .ue lo( r;p igexu 7c)*fba.jop's magnetic moment and the magnetic field vector is

  When placed askew in u(yn3dll 1z ,ma magnetic field, a current carrying loop that is free to rotate in any direction zynld (mul31,will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operationr syw60 gvf) n5sp-*eg of essentially all electric motors?yv0s)p*5n sggwr -f6e

  A circular wire loop lies in a horizontal plane on a jpndp oh-bm(. ): nsv4table and carries current in a counterclockwise direction when viewed fr snhm:p)bdpn. j-v 4(oom 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 the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q isv1,of2 8k gfo4 x/joiq accelerated 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 perv 4/2xgq8 oijf ,1fookpendicular 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 passing mm-0 lmuhykil4o4kpt: 0f(6f 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 fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What 4mhukp60mif4:-l ytofmlk0( direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uni1;xm vwhd*4)c 6wa ,*aguamq pki9x f(form magnetic9k *;mqu4iagfax) wpc ,(vx6hd am1w* field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a da5k *2i 7-m8s mbygwjsirection 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 o) w8(ry:faixv n a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle ox ( fa8)ivr:ywf $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic fieldm i mp/jhdy850p2zzo2 of 0.10z dp2imm 5y28j/ h0zpo T. What minimum 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 uniform3v3aubnp i yw7wl 9et mo8)e1* magnetic field of 0.20 T. What is the magnitude of the magnetic force on thp1bynw38otl vu 97m) *3eaweie 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 vzpphx97- +eo 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 s.(mkxvrbvkmi-rduray )b8 r0)e: 64vpeed 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 speehig rx a(++p+rd $4.0 \times 10^5 \; m/s$ 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 ;6tiwdnazu ;*s6 skb4f; rgk,$8.0 \times 10^6 \; m/s$ 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 ofl3 usap3vpr*tld39, z $8.0 \times 10^6 \; m/s$ 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 speedphlx oq),g1tna *j6m6 of $3.0 \times 10^6 \; m/s$ 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 c5 atd.uauh6je9k 2v2m s/dt c3urrent of 25 A. What is the magnitude of the magnetic field at a distatuvj/dt56ae9u sm2 . a3k2hcd nce of 0.15 m from the wire?

  A high power line carrying 1000 A aih.u3etyj02generates what magnetic field at the ground, 10 m aw.tj 2auey 3i0hay?

  How much current must flow for *ujqaj84zc 2ol55xe h$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A is the me7x, *ve m;x-iwv/ rwragnitude of the r-e;wmxi7xwv*,v /re 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 opposite dcx1 tc-qc/rc )irections. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one)tc/c-crc 1qx wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A 2o8 ep9m4jch0 .tmm0 tlxzcl9a3:av qand 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between th3c0:e2m pohtxl9.aqcj89am4z tvm l0e two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oc 3c32qo* )nqhyxz a*mpposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the tw) q xc3*c32zymo*qh ano wires the same?

  Four long parallel wires each carry 2.0 A in the a:tvxp g/+7a2 db2 m:ukvrp9em+o)mg same direction. They are parallel to the z-axis, and they pass through the corners of a squa2p/:+kv:uoad mg9 exv2rma bm+pg t7 )re 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 carrmi6t7 jzf y5b.;y-zh/k eecc. y currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find yfkz;hie 7zem cb-5j/ c6y.t.the magnetic force per unit length between the two wires.

  What is the magnetic field at the cent uoluf ytk+mt6,3,w7e er of a circular loop of wire of radius 4.0 cm when a current of, o3uywt f,+7emu6tl k 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns;ai4gh*( lif sqbgl *( of wire. What magnetic field is produced at the center of the solenoid when a current of 10 (i;*sba l4fl q*iggh (A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. 2y )i4lv nw94vtb4 9r2snm,g/wbknbb What stresv / nw9w4il2bt bbv)4g4mknyb,9 2rnngth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 wb8nzkr9 e-, no:oa7icm long to generate a 1.0-T magnetic field aan-rz oi7w89 be,ko :nt the center?

  How many turns should a 10-cm long solenoid xcs*9wqu14d e y.q - of+s+no/syh-brhave 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 carries s5r 75mvlou( k6.0 A if its dimenl k5r5m7v s(ousions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.5+s6y2d,g0 wr .mp(* urth( zfbnhox3n0 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetbz2.r6,+(np s3 u(hy ngdt0xm*f wh oric torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectionauv;,dc5r4jxkl;g x7xl 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 field of 3.5 T. ma:gkheg+j qw+: -q8 aThe lag : - 8hmqjwqe:k+a+goop 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 razml7ab4u*m h 4dius 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 lo*malub7z hm4 4op is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magneti 1kheq9zutckbj d1g-q,- u,, sc field of 0.30 T. 9-c,kq 1,guz s jqt1ekd-b,u h 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 wire loop of *a8zpmreur 3x:9w9swfz ph6 ; 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 single-charged particle (charge e) has a speed onrh) ,7ht:u. aypudx(f $1.0 \times 10^6 \; m/s$ 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 witf d r(oiu1a55v77,-e:mw5doxg zc kuth 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 magnbn1.ur.orcmg/l ;(k netic field of 0.040 T. What isc nrk 1/bug ;l.o.nm(r the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It ente/ucuf1t j9 dw9rs a magnetic field of 0.30 T oriented 9 cjfdu9 u1w/tperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potent;zby.) sb42q g(uv fwkial 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 the E-field is required if the particles are to be un42)f yqbw kzsu; g.b(vdeflected?