If the north poles of two bar magnets are brought close to each other, the tn6w56w6ne0 dpo2howmagnet2ww6o66 w t5o0 ephndns will

  If the south pole of one bar magnet is brought near the north pole of a seceba7/,qi n9qv*-q wx zk+y fd,ond bar magnetqw/y+ q9vf -,zd*kni7,ea qbx, the two magnets will

  If a bar magnet is divided into two eqag xpxy)4d :/dual pieces,

  The Earth's geographic North Pole is magnetically a55x707fab* tu m :j+zy ysdluy

  The south pole of a magnet points towar8 luooyf6ji3xp ;(hg2d the Earth's

  An electric current 5ouy9e nyp ;e05,rjgq1y5vy ;;mhh fg produces

  Which of the following is qtwgqt(+rd6)+z ,g 3jid3hgy correct?

  A vertical wire carries a current stranb+midjy io 9ms35;a.ight down. To the east of this wire, the magnetic field poiyjdsnib9 mo . i+3a;5mnts

  A horizontal wire carries a curr1cg20 saruf)d(lewk.pd5y9 szk 4 u o*ent straight toward you. From your point of view, the magnetic field caused by t)dwa uce5s*rd4 lup.os9ygzk0 2( k f1his current

  A current carrying loop of wire lies 397k jl /ffhhoeasp)e*27 -s5ystjy gflat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetie*f2jkpajs h ose7l9-/) yy7h s3g5tf c field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When viewebxg),t(v*kh xlr, ,fllo .5z oc*h4bh d 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 fieldl r,()hfkt**go.b,bh, vzhll 4xo cx5

  The SI unit of magnea/9 ac g1:rebotic field is the

  1 T is equivalent to 2dq av;1(biags 72zhb

  The direction of the force on a current-carrying w. /: a wgqqmf.m;qt ne/pqx(m+7l(c guire in a magnetic field is described by whicc7.u +/x;qq.t(ngpw qmfe mmag:q (/lh of the following?

  The force on a current-carrying wire in a magnetic field is the stro)en3 uuv+:x langest when

  The force on a current-carrying wire in a magnetic field is equfih *40aa3 c0r9aky6hhf6yv ual to zero when

  A vertical wire carries a current straight up in zq / jzjfx 8fhixn)e/mf 3w55.a region where the magnetic field vector points due north. What is the d jw.fi 38 f)jxhqe5z5nm/ fxz/irection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thid*.z5iq zi5d ss we can concludzzd 5i 5q*s.ide that

  A charged particle moves with a constant speed thm ruo46 r g*wt9so60cjrough a region where a uniform magnetic field is present. If the magnetic field pom g tcr rw6ju64oos*09ints straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves acj 1gi,.j0xnghq*s7 sgross a constant magnetic field. The magnetic force on thish,xg gsjj0i *. s7nq1g particle

  A charged particle is injected8i1wty/htqp 4(q g4ji into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring tqti g/ (4 qpitw8yh41jhe particle's weight, the particle will

  A charged particle ir*m zt6cd a 1cvt4i.u4s observed traveling in a circular path in a uniform magnetic field. cd4t1*vu6mt r 4ciz.a 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 circuq3fih 0pqc5lvhj xd*r9-019tk 9n veklar path in a uniform magnetic field. If instead the particle carried -rlivcv3nhd1* ef9 0hq pk 0q59t9jxka charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V ,erl1r, l6urwf)9 .um v+ytke in a uniform magnetic fiemrv6 +yl 9lf)rew1uur,k .t,eld that 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 c31 85asnca lzi+4arxn urve upward as the result ofz+ aanl n 3cs81iar45x a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where the1.8wa+7t 4- icz bxcu fca+ocrre is a uniform magnetic fieicx au+.-o c8wtr+ ca1bc4f z7ld 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 curr3 fzezf :rmeqld(0t8/*ot*w k ent-carrying wire is

  At double the distance from a long current-carrying wire, the stren pjmkw eikq;) 5d+mo-9gth of the magnetic field produced by that wire decrkpieq j dw;5mom+) k-9eases to

  Two long parallel wires4pyh flyfzb 3 :5y19kp placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries 1f3h4yyy: zkl5fp9bp 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 placei2)* 4:t 1sfgznvgkwi;p ksz:d side-by-side on a horizontal table carry identical cu:gnwtkksgi1ziz;* ): 4 s vfp2rrent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitudjl)es+ 3i7/ ihd cm:hee of the force between the wires is F. The currish3 mc +dljiehe/7) :ent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towarbn5x4t2ic27 oy4rth c d the east. A proton moves toward the east alon5r4c4ybnxc2h to it72 gside 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 towardzawz2 ,e31f-tq hl9lw the bottom of the page. What is the direction of thza1thqww fl-, 2z9el3e magnetic force 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- n9ggczsp h3fh 9fl;wd5u g,*;by-side on a horizontal table. If the wires carry curf* zg9h 3,u9hl wdscn5g;f p;grent in the same direction,

  Two long parallel wire-2so dhti3 1t( -vmqsps are placed side-by-side on a horizontal table. If the wires carry currst13(h d2q ps-vtmi- oent in opposite directions,

  Consider two current-carrying ci yi:lq5ek.j6 c0 ywz:n-f :sdprcular 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 field at the center o:0y5:kws :ef lnj.- icq6pdzyf the larger loop is

  Consider two current-carrying circular loops. Both are m3hoq4y 38sj dtade from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic momenj dq4o8y3s3th t of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque o pha7 :4atnm+6jp bipa xed*8jg6f9e; n a current carrying loop occurs when the angle between the loop's xea8b6;d6fp7 t: +g an*ih j9mjp4peamagnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop th.ld6s9 :5ic7pmemt xfat is free to rotate in any direction wils f6lp. 9 i5tdmex7c:ml experience a torque until its magnetic moment vector

  What fundamental fact jm0 .gw9fx uu4sm7h0nunderlies the operation of essentially all electric motors0 jh0fnw4muu xg7sm 9.?

  A circular wire loop lies in a horizon kqit8+ 7;agcntal 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 horizontal. Which side of the coil tends to lift off of the table because of the torque caused by thi+a ;8 ngt7cqke currents interaction with the magnetic field?

  In a mass spectrometer akyg brq8 mne 1bux+63( particle of mass m and charge q is 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 perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q,m exug qk3(18yb r6+bn V, and R.

  A velocity selector consists of a charged particle passing through crossed elecggg vnvz74nf05w 4fc8tric a7 fcfz gv8v5nn0g4wg4nd 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 direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel f rfflt 6uj-;)to a uniform magnetijt fl)u-rf; f6c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currene;cp80c csrq 7t of 10 A 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 metl(b19 ;2-wmuf itofr u qp1fs*er on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an anq1* 9trlbuf(w;s pm2i 1 ofu-fgle of $27^{\circ}$ 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 magnetl ht0ofqi9 7+eic field of 0.10 T. What minimum current in the rod is ne+qt lo 0f79heieded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Wh nz 6ohye/ozj6j-ljk-6 fs 6;hat is the magnitude of the magnetic force on the proto6sly-o6e 66 / hzzjokh-jj ;nfn?

  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 speen4.svqg; lr2l qv2 .odd 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 speem6-*.bb xnl cad 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,qa 4lf:4ivvsii2 xa9 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 withj;m+rsj)h1cu 4*j )s x 3tyl- h;yhvum 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 speed o2tgb::. hth /td2.ehsa3cdf leqw68 n;ea0hj f $8.0 \times 10^6 \; m/s$ 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 speedabh,+p *xa;sqex(jm8 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 carriem:4 r*wqghk,vug( q6e s a current of 25 A. What is the magnitude of the magnetic field at a urg(w*h m6kevg :qq,4distance of 0.15 m from the wire?

  A high power line carryfzzr;m8i1 fvxin1, wwp1 .vi;ivupt y74sf+ -ing 1000 A generates what magnetic field at the ground, 10 m an7; w ivtpy- 1fizzur1fi1m; .iv,4vs8f x+pwway?

  How much current must flow fan,/jx8s i vrdy9d. q-xb2lka -0zjf: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 straight wire carrying a current ofouf)ni3: ymk8+ne7hr eji io.9sgf7 ( 5.0 A is the magnitude of tomeo.ie79 yu+ f nn i3) hj:kfr7(gs8ihe 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 current s(*gxtuh-ko3 s of 10 A in opposite directions. They are separax( -3ktghosu *ted 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 oppositel5xhn6mq ie51 directions. The wires are separated by 0.20 m. What is the magnetic field midway between the twlm1 q6nxei55ho wires?

  Two long parallel wires carry currents ofelfocy+;t ncd;- )9 jw 20 A and 5.0 A in opposite directions. l j-n;co ) +fwdyt;c9eThe wires are separated by 0.20 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 dire w-1meur47g:1dkd( qc frulr: ction. 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 fielf:ck7-m4d ru (1w1reu :gr qldd does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A p,ypfil9.o1 z+ bel:pand 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.flbpzi :+epylpo,19.

  What is the magnetic field at the center*x-ekz5 ovb9t qo/(zi of a circular loop of wire of radius 4.0zv/5i-te o k*x(9zqob cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wo*j0f+ mdutw-m und with 5000 turns of wire. What magnetic field is producedudwjfm +m0-t* 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 4.0 A.e9paybt 0et:, What s: 0,pebt9 etaytrength of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to g o k15fhgg dhz5mh ;3,z3n-rkeenerate a 1.0-T magneticg hh,1rh n5zk emd53;3oz -gkf field at the center?

  How many turns should a 10:-a(6x9gs (hsuod yk s-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 rectangular loop of 120 turns tha 6iij,4j*h. :n ju60cywbi htlt carries 6.0 A if its dimensions b y0ji6cjti4n*, :wl6 hu.jih are 4.0 cm x 8.0 cm?

  A circular loop of wire of rhd09g( elrk+k adius 0.50 m is in a uniform magnetic field of 0.30 T. The current in h0r +k(l9keg dthe loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of3)vsiz+je q gxy00e :hgn *cr8 cross-sectional 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 A5*rm8 s xx;z*lu5sv-bpg t 7ss is in a magnetic field of 3.5 T. The loop*75- ;*sls 8uvs5 grbpm xsztx 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 gjghuc 6n/ki2p5( l: xa uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whel n62 c p:h(jg/k5igxun the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic x0;l n*tc:gp vjfq*:afield 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 parallel to the magnetic j*p:;at qxcfv l0*:ngfield?

  A circular wire loop of l2 p+e )il(dku;kuuu: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-c,5 wefwt oqt* jp7/lc;harged 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 vell03waglho rttrl3cfj3x -3 3,ocity $6.9 \times 10^6 \; m/s$ 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 potent z)h3y7o1mjjb*ay ot3 ial of 1.0 kV and then moves into a magnetic field of 0.040 T. What z)ty7 a *hyb3oj31 jmois the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a toxc*p3c6wo 1 magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the rtxc p 1oow*3c6adius of the path it follows.

  A beam of electrons is accelerated rr z( 17axhf1lxkw0)pthrough a potential 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)fkrrlp171(xz ah0 wx is required if the particles are to be undeflected?