If the north poles of two bar magnets are brought close to each other,l:s0dhz m lxl)j8k+1 v the magnets willjvlz)1h: 0kxlmd l+s8

  If the south pole of one bar magnet is brought near the north pole of *x0mc e. 1r; a ztfpv)kwi3n.oa second bar magnet, the two magnv rc.on3p)awez; x10* f kit.mets will

  If a bar magnet is divided int 7q.lk m5ujp2xo two equal pieces,

  The Earth's geographic North P:gg6krspl *s*1fj (xgole is magnetically a

  The south pole of a magnet points toward thnf h6/nv ediij t/uica1qw;1n4u 9 +4le Earth's

  An electric current produ q,l**mmvqn 2uces

  Which of the following is cor1 xg+:+ vccdhurect?

  A vertical wire carries a current straight down. To the east of this wire, theu5o0)f5o hbzi2aw -oe magnet fwi-azb5uo)h0e5 oo2 ic field points

  A horizontal wire carries a current straight toward you. From you0pyyius, so) 2r point of view, the magnetic fie0i 2yo p,susy)ld caused by this current

  A current carrying loop of wire lies flat on a table top. When viewe o e +g-krz-wse:k4;kl:s:t7viiqp/k p1 tz 2ld from above, the current moves around the loop in a counterclockwise sense. What is the directi4p krp o-i27l: zg/e;t-s:les1qzik t kw:k v+on of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. Whenjqmo3qjt ( (o4 viewed from above, the current moves around the loop in a co3mqjjq o((t4ounterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnet;xhzgi7. wh esq:oho 3e2c;*41hu 7j iatq)ktic field is the

  1 T is equivalent todj*m .s lyhabk* as b+0 m:i6i6v 6.e,n*mrazl

  The direction of the force on a current-carrzqo h 8x:kim/jh3s6 c9ying wire in a magnetic field is described by which of the followihikzj/ x oqmsh96:c38ng?

  The force on a current-carrying wire in j b(795pgu;lwc qvoqmqf6e ,a qc3 7k3a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to -qm2 mhwjks4/ y*av.j zero when

  A vertical wire carries a currv;q6lh-p mvpikei*01ent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force 1 im-vk;*pvi0 l hqp6eon this current?

  A charged particle moves and experiences no magnetic force. Fdm f r6c218hc2vm; 4nx0vh hfxrom this we can concld f8 mfhx;12cn6m4hv0h xvc2rude that

  A charged particle moves with a const d uyf86:mvo4bfa+(ae zt 1bs5ant speed through a region where a uniform magnetic field is +b6sd fy(ao8vfuz5a1 eb4m: tpresent. 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. The magnetic :hyob :/ u- 7i*nmw,z/yg7wp cdwrbz;c0kua;force on this partic7 c c uzmww/d;bu k/pbo*:,zgr7yay-;h 0:wni le

  A charged particle is injected into a uniform magnetic field such t7zp.dv nzwdv68,d e -khat its velocity vector is perpendicular to the magnetic field vectp6d, vdewn7dv.z- 8kzor. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a wt:fm4d 1u5l huniform magnetic field. If the parwh:1 fdu l45mtticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e tr/:yue y)mf wm/avels in a circular path in a uniform magnetic field. If instead ue/w) yy/mm:f the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speedqse. .a.pf lrvw+g3kc;m(7v0q2ih5x b1 vqwi V in a uniform magnetic field that is directed straight downward. The magnetic fvpxvgifm12q.b wk05; r .+7ehivaq.(wcs ql3orce that acts on it is

  An electron has an initial velocity pg bk5gf +ht1(8 urm3kd3oil4to the south but is observed to curve upward l mgpfu4dh3k r igbo5k1t+( 83as the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uni2kuk(rkz77 siform magnetic field krk7 u2 s(kzi7in 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-ca a lt/b2r6ayx3-/yzpla z;g*mrrying wire is

  At double the distanc0l 4;1qm bsfede from a long current-carrying wire, the strength of the magnetic field produced by that wire decreases 4fs10be;lmqdto

  Two long parallel wires placed side- 3e (ccf8irw09a5qxn fby-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 point of view, the magnetic field at the point exactly f90a38wfxci enq(cr 5 midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table c6tgbr 3+pl co)arry identical current straight toward you. From your +)botr3cp l6 gpoint of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal h *;h-3qoze i3+fktpjcurrents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force bet+* hfto i3hz ;k-jp3qeween the two wires?

  A long straight wire carries current toward t kq3(a 8*)qjunn14/mufrhbajhe east. A proton moves toward the east alongside and just south of the wire. What is the direction of the forfq83aj nq) *1(au mjub4h/knrce on the proton?

  A wire lying in the plane of the page carries a current toward the bottom o4sar)g kgd7 7bf the page. What is the direction of the magnetic force it produces on an electron that is movgb) da77k4rsg ing perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If the 0eo887:ee e8z 3nhssq*js2s;mn euts wires carry curms n2*8n qezse o;sj:ts73 eh ues808erent in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If th9dy tiho7r(v0 e wires di0ovy7 h9r(tcarry current in opposite directions,

  Consider two current-carrying circulaf7 :.n; w3byhpcmsv:fk, mta7r 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 magnpwm sa.7 vf7 3:yhm:k ;nft,cbetic field at the center of the larger loop is

  Consider two current-carrying circular looh4b-+qhr9d h zps. Both are made from one strand of wire and both carry the same current+h h9qz4 db-rh, 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 be358pz6e jv twzk wm/i:tween the loop:kp jemzziv/tww358 6's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free tok*c83 fi-3glvwp5 ful rotate in any direction will experience a torque until its magnet5-kfwg83 flul vi*c3pic moment vector

  What fundamental fact underlies the operation of essentially alld*q0 u / 20f 7qjc;cgdps cxtkmmwc;3kkms,8/ electric motorsdxsmd;fqcmkk/c /c0t*j 8 ;gw q p2,s3muc 70k?

  A circular wire loop lies in a horizontal plane omj ,oycclh4r ,r1ma92n a table and carries current in a counterclockwise direction when viewed froymj ,oc24,mal1r9rh c m 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 is acceler;-ufp1mct* ob ated through a potential difference bmu-fo pct*1; 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, V, and R.

  A velocity selector consists of a charged particle passing through crpd :(vdtk8w.e ossed 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:p(v dtdw8e.k 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 carryinlp c 7vbsamn2)cv r1(bpoz- 10g a current of 0.60 A is oriented parallel to a uniform magnetic field o(s)-b2rb v1zlacmpo n17 v 0cpf
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of y*gi* *fg swu*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 meter on a straight wire carrying 5.0 7j v,z 4ay+ matpaj +s63zv2ztA when it is placed in a magnetic ty4apas2z +6z j,am vjv3t 7z+field of 0.020 T? The wire makes an angle 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 magnb5 3xgmrj tp1*46xkfw- u*j2ger pu0yetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the rp6exb- ug*r 4 tp jjfy1x0 ku25mg*3wweight of the rod?

  A stationary proton is in a uniform mag2q8wtnw t4 -lanetic field of 0.20 T. What is the magnitn 8a-wt42qwtlude of the magnetic 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 of g,u qc;f1b50h 5fhjrt3vq1 wyy xg/p2$5.0 \times 10^4 \; m/s$ 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 speed of nc0hwb pe* 5c9$5.0 \times 10^7 \; m/s$ 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 wia+q80 olge9gc0 b9md 9 qhfvd2th 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 speeddhm47;gt /gog 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 of8ngyar 5bv ze+/qs v25 $8.0 \times 10^6 \; m/s$ 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(guzssi9f(: d 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 current of 25 A. What is xpcd6wb895dn4ezs lnhy (0j6the magnitude of the magnetic field at a distance of 0.15 m frodwnld80 zn p5j4 6 x96ysch(bem the wire?

  A high power line carrying 1000 A gen8i v*sckis:97cg-u1d ini ox6erates what magnetic field at the ground, 10 m away?ks1 in*i97cxig:so 6vdu c -8i

  How much current must floh9bgn16k q.v+fo,z,s6f/jbyjy:b ky w 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 nzet:e11 j7hx8 gvq o2A is the magnitude of the magnetic field due to the wire equal to the strengqhgz7n2 et8v:11 joe xth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 k+ykaev2 23/ bwti(yrq7 jz5p(to8hpA in opposite directions. 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 kb27/pqw itp8ej5 ( oytz hayv2(+3rkwire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direuugiwvf k.r;jqsp/ob0 //iub)9 w/k +ctions. The wires are separated by 0.20 m. What is the magnetic field midway between t+)/j 0ursbguokfq9 bw uvw/ki. p;//ihe two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions.-6(nb 6 vzfvacz.vws 1 The wires are separated by 0.20 m. At what point between -sz bfavcwvn6zv ( .16the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direct4ib imp(8 8cng lo7e,oion. 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 7m8ibnli4c p,8go eo( of the wires experience due to the other wires?

  Two long parallel wires carry currents zhy2od2*-z;ag1hm dqof 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length be*o g1ha2-2hdqz;mzd ytween the two wires.

  What is the magnetic fieldu: udnwmhw-4* (xd:c h at the center of a circular loop of wire of radius 4.0 cm when a wm(x -: ndhduchw*u: 4current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What mag qzdd7/ o bdekf4y6ob5 )4tm6lnetic field is producedb 6kd)o o 44mqbf7zd 56l/eydt 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 o rrqwuenjmn1io n(*9.;8g9 v)lwp ) pnf 4.0 A. What strength of magnetic field will it have at i9qwnep*u rg9n rjl(.)no1)8pv mn;w its center?

  How much current must pass through a 400 turnf6cf2tao7z i1 coil 4.0 cm long to generate a 1.0-Tao1t c 267fzfi magnetic field at the center?

  How many turns should a 10-cm long so7ftbvd1 gwo56sn my:4. y4 puolenoid 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 obrj dhu;k3ywsi()41 xf 120 turns that carries 6.0 A if its dimensions are 4.0 ;wjb 4hyk)(1xirs3ud cm x 8.0 cm?

  A circular loop of wire of radius 0.50 s4uas3q3 n2fhnti71b 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 magnetiinsa2qn bu4s1 h 3t3f7c field?

  A circular loop of wire of crossmqvv 9c9a,xx gr-(5mcr 3qbf. -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 hxatg,* c g bf542)giyof 2.0 A is in a magnetic field of 3.5 T. The loop has anbyt gx*2gic4gfah ,5) 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 a uniform magne4r jcpftm+ej m 5i40i2tic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic t+2jr5fmi eptj mc4i0 4orque when 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 field of 0.bwyvj5lgi u 8v8qx ;:;wa32 zp30 T. The current in the loop is 2.0 A. Whag:2bp8xvv 8u a lyj;z3 wq;5iwt is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of a0 ),qc(m:sy7d ul5ig 1 worzwerea $0.25 \; m^{2}$ 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 (cha7adpft8:nawumy /l, /rge 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 velocity 1o5* 83u g;jqv0,cpxp ;u lsm ub5syfw$6.9 \times 10^6 \; m/s$ 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 1xw;q5byrxwz 5+d 56at.dq jvlnn-7.6q yxb,y.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting oqyjdzw.67,;nlvrx q + y5nxq 5wb- bat.y65dxrbit?

  A proton is acceleratid5 /2 sjjcc-med from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radiud2jc5si-jc m /s of the path it follows.

  A beam of electrons is accelao 7*lkm47rywb 2)f m+ k8csxcerated through 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 is required if the par+ck 7mylm4fcwx brs27) a8o*k ticles are to be undeflected?