If the north poles of two bar ezh+0h2; w7x2jal*ao j q x,rnmagnets are brought close to each other, the magnets *aj7;lxnw,re+z2h h2 qao0jx will

  If the south pole ofwci(i l9kf.,s one bar magnet is brought near the north pole of a second bai( wskl ,.fci9r magnet, the two magnets will

  If a bar magnet is divid,/ kqi 39qhpuied into two equal pieces,

  The Earth's geographic North Pole is mag egfw83obz l7-fszz r+0sq-,qnetically a

  The south pole of a mx5tq::, zyb ulf5z)cwagnet points toward the Earth's

  An electric current pr e)l e*v mxypw+j3wb5c*j2r1doduces

  Which of the following is c- ;a17alqkm v9 7sc bgkq+p m*k(j-zyforrect?

  A vertical wire carries aky4 v (9px:woi d+2rkc current straight down. To the east of this wire, the macp2 ow4d(+kv: xyr 9kignetic field points

  A horizontal wire carries a current straight towardoi4i(m p( b z:nj (cvjzz5b4zqu9ip30 you. From your point of view, the magnetic fiom9nb(jq 4z5(iz( ipi c:z p3uvb4 zj0eld caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from 4kl:52pys,hc4 usvsx above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused blc 42hsp4, vx:sukys 5y this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on epj8 b z5(vkgl ynv )71;9g,d)fal upma 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 magnetic fibvf) jp7mp98,; ku1lda zy)l5(n vgegeld

  The SI unit of magnetic field uin*yyqpra r j48i407+ikhr5is the

  1 T is equivalent todrb: 7o1(ljmhcjg6 ( c 5.ogpx0g ptm5

  The direction of the force on a current-3bsjaj1uv7 qfn .a(s/ carrying wire in a magnetic field is described by which of the followvjs(snj a.b 7ufa1 3q/ing?

  The force on a current-carrying wiya 9m7sirs,:d 4:pe9a1xlsf ire in a magnetic field is the strongest when

  The force on a current-carrying wt4 g)(2lmzqbi5es 6xkire in a magnetic field is equal to zero when

  A vertical wire carries a current straipkvea;h 2thfgj33 /u*1 hjxp5ght up in a region where the magnetic field vector points due north. What is the direction of tetjpg;*ah3 u15fhx/pv 2jh k3he resulting force on this current?

  A charged particle mo6efyph9;vz0n3/ybxri / kj4 vves and experiences no magnetic force. From this we can concludrvz 39vhpijnyx;y ef 46/b0/ke that

  A charged particle moves with a qkjv 9 bfn*zo7m;: jr+vedx0w4,zd f5constant speed through a region where a uniform magnetic field is present. If the magnetic fielrxej qd :+nd7,z0bo *w45mkv f9;vfzj d points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a conbnbc*k res)l2d f2ssi2n y689stant magnetic field. The magnetic force on this p8el6y9d2i sk)2scnrfn* bsb2article

  A charged particle is injected into a uniform magnetic field such that its velowbldu*8cjf)/ziv o l:: /dwo 1city vector is perpendicular to the magnetib) wc8l*oodlvu /ijdzw1 ::/fc field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uahlddc e7 jjlo 6k: s,4u(08finiform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would 6h8l:j e,jcaksiul(o df 4d07 be

  A particle carrying a charge of +e trave .rmev3a /5w4q m3ngtw./mbbsuq5; zvls in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path w5w/bz4sng.u .qtmra3ew vb/ q3;m5mv ould have been

  At a particular instant, an electron moves eastward at sp0 1z88g0extwplfx l5oq .r1laar0 xc2eed V in a uniform magnetic field tg 1pl 02owzxac8a15lrfe8.0 t qxxl0rhat is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to xih .gq*7ner4x3a vy +curve upward as the result of a magnetic field. The directix n rv*x.+q3ya4 hge7ion of the magnetic field is

  An electron moving along the +x axis ec oy m mba-i,.8bbm1i.nters a region where there is a uniform magnetic field 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 ,ymm1b bii8aob -c..mpage.)

  The magnetic field produced by a lon46s4 s(izditi1t pxi) dx 8dh.g straight current-carrying wire is

  At double the distan pjms8p 37ci6ace from a long current-carrying wire, the strength of the magnetic field produced by that wire6i a7jscp3p 8m decreases to

  Two long parallel wires pm6ezv /t(r .9 bw)qqgb lpmy+5laced side-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 wm/qmbv5+(q9ytleg r6zb)p .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 horizontal table carrsihnr +t((z zo-cd8lo9.nk)x k jg2i,y identical current straight toward ytoi l no z(x)( j8k9h2,zcr-k.n ds+igou. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitu u5k3amn9jm d7de of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force bu m5kna d97mj3etween the two wires?

  A long straight wire carries current toward the east. A proton moves towa,cug- ltcz-, zau6 (tpv:syp1:)mhl kuw65 ukrd the east alongside and just south of the wire. What is the 1 )5u c:h, -t p(u6l,m-zt:agkulw pc yz6kusvdirection of the force on the proton?

  A wire lying in the plane of the page carri)yr iwqj)g;kl (m)v6aes a current toward the bottom of the page. What is the direction of the magnetic )jv y);awqgl)mrk( i6force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-sid; zy0palv5el9e on a horizontal table. If the wires carry current in the same dir9yl5v za ;lp0eection,

  Two long parallel wires are placed side-by-side on a horizontal k:6fy5gzfz 9 m/ ekvd)table. If the wires carry current in 6mfg9:/fe)y kdzv5z k opposite directions,

  Consider two current-carrying h ;uhqmuzu,(k63ux: ncircular loops. 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, the magnetic fiel;q nukx,um(:u3u 6 zhhd at the center of the larger loop is

  Consider two current-u1e9vkssm / d/p ew6n-carrying circular loops. 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 moment of the smaller loop,k/e/s nd-pw1e6 mv9 us the magnetic moment of the larger loop is

  The maximum torque on a current carryip (nil +6u4wx c,/ourfng loop occurs when the angle between the loop's magnetic moment and the magnetic field vector i6p +4cuur(x/i, nfwols

  When placed askew in a magnetic field, a current carryinrb k4;q,jddx8 g loop that is free to rotd k;dx4rb8qj,ate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all6h3(u i cn2ssb electric motors bs6ic3n(2sh u?

  A circular wire loop lies in a horizontal plane on a table and card5mvyw31o m5 +fsnyns( ujq3 8ries 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.sym+ w3 j8om5n ns13dv5( qfyu 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 through (p33 ucm,ofim a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radiusu(pimfo m3c3, 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 cofq8 2a4be nlj;nsists 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 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.nf 4l b;qa2ej8 What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is orientedjg80o..el +i/lkbo svaqj5h. parallel to a uniform magnetic fl8shqje.b05gavi o j./+kl o. ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a diren5) 4)x ;d)etuhoqnoyction 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 whelw tqwkym h48.33t-a., sewj:jv bn(m n it is placed in a magnetic field of 0.020 T? Thea kw .j,m vbytj:wwnh4-stm qe(3.3l8 wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has 8kiqjv,h3 t( fz ur)slo11*aza mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current iz8lq(*r su3vfh1z)t,iojk 1 a n the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetrphwp ms8r699r+ekv7ic field of 0.20 T. What is the magnitude of the magnetic fe p6978 9srm pr+hkrwvorce 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 spe 1g /hq*adi0zped 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 spee i,we:a 4agllgr; +qkmg7-8ch3s h/ehd 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 nor umstwsb0hozpf5i.04jam) 2k .r fg.6th 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.jx1n(h plwa0 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 sactk6 6 dtz-kn35max: peed 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 oe46xa7odzlu )f $3.0 \times 10^6 \; m/s$ 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 ma0a/m*p-hcstw (xlbj, ea0n ix7 :sbk:gnitude of the magneti skpb:ti,0h/:- wxlxabc*ane7jms(0 c field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whatqcgu(y7d 1u ooyn), 3b magnetic field at the ground, 10 m away?n3bu,y 7dyo)u( og1cq

  How much current must (8* oeurm qm sqsm4sr21at0x; flow 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 straight wire carrying a current of 5.0 A is 4cj0 tmyj7pp (5 vzm*rthe magnitude of the magnetij4z0pctm7 v jr(m 5*ypc 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 wib6 /-mul0mq bd66jqcfres carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the j6 fqqmu6bm /dc -0l6bwires 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 directionsy9nvq vnot wzyahl -0-fn,,66 . The wires are separated by 0.20 m. a6-y-z9qt o h60yn,nw,n vv fl What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direct/q vt*vqzb +*eions. The wires are separated by v+te*b/ vz*qq0.20 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 A in the same direction.: 10h z r6w2+ak,crxg)kn 0uprkmbg;c 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 of the wires experience due to the other wires?0r,p;u)g2kcxk1 +hmzw0r kc a 6rgbn:

  Two long parallel wires carry curdmt,4 tphqo z)3-wdqu (kxnkn,b eo; . l*r8y9rents of 5.0 A and 8.0 A in the opposite direction. The wi*k -lyu.,r)8n4o;ekn dbo3w(tp 9hq tz x,qdmres are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center o7 k-xmz4rz :fi6+9lqrvcxo)cf a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire?rcr4c6 z 9z )xv:m+7l qx-ifok

  A solenoid 20 cm long is wound with 5000 turns of wire. gui31hz6* ajlWhat magnetic field is p3 z1gl* ihj6uaroduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m l4 .muqu/fqr8oempxzlr.63k 5 ong and carries a current of 4.0 A. What strength of magnetic field will it have at its k. 8 5fp.oequmxrz/m ul 3q46rcenter?

  How much current must pass through a 400 turn coil+ypzl+ q.0fai 8vtlt * 4.0 cm long to generate a 1.0-T magnetic f+pqf8itz 0l*.yatv l+ield at the center?

  How many turns should a abq-+1p8xlg spgu*1qvlwg 49 10-cm long 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 rectapukvr narbl.kc32;5/kv6r0 cg3 )h jkngular loop of 120 turns that carries 6.0 A if its dimen;rc.6gpr kkh3/ )vk3c jnl2a r5vkb0 usions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a ufjxwt z 9ygv7li )/9s8niform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magg9w sv)9/yzl8itfj7xnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional area k2efpgu8)9s1zr2 flwr 8z7gn.e i7or $0.12 \; m^{2}$ 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 o*)*l(xz,2t-xs7akf nmly7n t cp ybw 7f 2.0 A is in a magnetic field of 3.5 T. The loop has an area)tznpfya(*n*xlybc- , 7 7m7wtk2lxs 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 magnetiz(/wvckm+k,t/ ihb*p p i;+ ioc 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 iso +/bhczi(+i ,k/tmp* ivpk; w parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unifn:2oeec pd/ (z tf )l5/irha*form magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the l/ z2a:ohnip5 rtdf)fece* / (plane of the loop is parallel to the magnetic field?

  A circular wire loop of area u0t;onxffs 4 rt/ /hq-$0.25 \; m^{2}$ 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 spe z wz:a;5jkzd5ed 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 ion4a,o ntg-pyjme 9z66j ;5au k(cr.ckw with 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 mofz0 o+ vsbdu0enc27(vves into a magnetic field of 0.040 T. What is the radius of the proton'sczd su0nv(ve7o2+ fb 0 resulting orbit?

  A proton is accelerated from rest thrf)8iixnj l0 .ig(gkv4ough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its diig8n4j. g) xv(0 ikfilrection of motion. Determine the radius of the path it follows.

  A beam of electrons is acceleratct:i3ukny. 5g57kv9 fzn xc,;ag;q4bbn fd)yed through a potential difference of 10 kV before97cv; 4n di.xnya)fkntg :q,cku5 zg fb5;b3y 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 undeflected?