If the north poles of two bar wulu cj4v* 1/hmagnets are brought close to each other, the magnets wwuuv/l 1cjh4* ill

  If the south pole of onjvkh1/ +k j8m7gl6bjdix9t 6re bar magnet is brought near the north pole of a second bar magrjxlvg7kjb ih +8jm6/69dk1tnet, the two magnets will

  If a bar magnet is dividm 3sob(icp x;d ly0 *j:;vjg9sd 4n5l ,m1zzyyed into two equal pieces,

  The Earth's geographic North Pole is magnetically a -zmmf0; *fm(,smirbn; j;wlp

  The south pole of a magnet points toward the Earth's27xo3z4 oz- sssf3 qwa

  An electric current po+f1rq y ulj2gparx9)b 7 (tn7roduces

  Which of the following is correc 9on(w9dj 8bdk/uu9p64cph rit?

  A vertical wire carries a current straight down. To the east of ;xgr/v8a5 ms1kfq.qz3 p e ri5this wire, the magnetic field poins1 pi;a85kr re35 /gmqxfq.vzts

  A horizontal wire carries a current straight toward you. From your point of +ukks;yk,iy m-j 1skgb3 ):olpho5b 4view, the magneti1 ) 43hbmsbyus:i;kk gkooly,jp+-k5c field caused by this current

  A current carrying loop of wire lies flat on a tabmyw0j1k p8i+ ;n oz .phl2ss:zle 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, outside the loop? ljmi+s1 o8h:wny. p0 zkp; s2z The magnetic field

  A current carrying circular loop of wire lies flfan+hnq 937 ymat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sq97mn3f yh+naense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is do auo2n8e4*koyo 5/gthe

  1 T is equivalent toq:-1y57:hiu h r+ g mxojbyn1a

  The direction of the force on a current-carrying wire inhsarqp.gl3i x0:7.el a magnetic field is desap 7li q..l hrgs:0e3xcribed by which of the following?

  The force on a current-carrying wire in a magnetic field 1 tvea( cx)ij.is the strongest when

  The force on a current-carrying wire in a magnetic fqj5,sda- u hw7 7x1itlw-tu z3ield is equal to zero when

  A vertical wire carries a current straight uphm 0- dpn1vte+ in a region where the magnetic field vector points due north. What is the direction o h-1p vnd+etm0f the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can c va :w16wn: ddo9ah8ygoo8w6h:y wvd9d1agn: anclude that

  A charged particle moves with a c9j u-zxfc1a 7 4bz2xoponstant speed through a region where a uniform magnetic field is present. If the magnetic bz1xj4uc-2x9a7 f zopfield 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 .dpd mrih n3:pftf,7. field. The magnetic force on . d3:,t.7ppfdf nh mrithis particle

  A charged particle is injected into a un;ew bxn7:q:l niform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will e::;lwxn n7qb

  A charged particle is observed traveling in a circular pathgm)(dij/.oy f in a uniform magnetic field. If the particle had been traveling twice ay )g j.o(mdf/is fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cj,9lfwr)rc ocj)u/1t tw95 zfircular path in a uniform magnetic field. If instead jctw)5 tff9rz/)1,o9wl jcurthe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, axndgr9b+ ixpm5 bp3 ,4n electron moves eastward at speed V in a uniform magnetic field that is,9nmp3xdxgpr+ 5bib 4 directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve pjy q:: a )-oxp- g tgv ,apugqx7em.:n:gg1k:upward as the result of a magnetic field. The dir pa1gjgmqp:k- tu-,7 :y:g)qx a:ne pg.:vgxoection of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unifor*/v0quny 6,bn5 e k; q2dsmzlpm magnetic field in the +y direction. nqpv2myz;ls qn5/6,* dk 0eubWhat 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 l -;b /8r m9m7kbv.73ldcz /tv*0mku b wdbqvbhong straight current-carrying wire is

  At double the distance from a long current-carrying wirefe75 ld45ov c9)dd xih, the strength of the magnetic field produced by that wire decr) dd c dl4x75h95ivfoeeases to

  Two long parallel wires placed side-by-side on a horizontal table ( 8ta0y1onah ok.yx5) u l)srvcarry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries c kya0a.5s) u8vrl(1 )xh ootnyurrent 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 horizone2,ywuu* kui:fm/ gv -tal table carry identical current straight toward you. From your point of view, the magneti2kw/:gue* vy, u fi-umc field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force b3s ub l 3i8mp)jpu1x- ysog:w9+jt zrmbu4;1x etween the wires is F. The current in each wire is nowu)jb;u8 - pobr 41:3s s+py 9uxgmtm3wxizj 1l doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towaru, 7s;bhkm 2au6 +/pxse7 q;buwxglb 8d the east alongside and just south of the;xgsu hqk7plb7/u ;u2 +,mb es 8abxw6 wire. What is the direction of the force on the proton?

  A wire lying in the plane of the ph9 gi30 m2zrp2wp co.yage carries a current toward the bottom of the page. What is the direction of the magnetic fo23zrpcw gh .2oim0 p9yrce 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-side on a horx4/w,jev6pne izontal table. If the wires carry current in the saj,e6pxn/ 4 wevme direction,

  Two long parallel wires are placed sid j y0( 52eyos4yddt5rggg*.fxe-by-side on a horizontal table. If the wires carry current in opposi(45*fsg d50ot2gyeyjx r dg y.te directions,

  Consider two current/vm2zla tx m9--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 field at tm 2xtmlz -/a9vhe center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made fror 3 :6x rlpfzdd(f6fd/m one strand of wire and both carry the same current, but one has twice the radi3 rfldrdd z/p:6f6fx( us 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/v03.duv clvez0 ixsflm 6xx*s 05.ra when the angle between the loop's magnetic 5cd30ax6x 0elzssu. /flvmivr 0x* .v moment and the magnetic field vector is

  When placed askew in a magnetic fieldr 5w;ky 6kpp3i, a current carrying loop that is free to rotate in any direction will experiencykp3p wi6k;r5e a torque until its magnetic moment vector

  What fundamental fact underlies thtq;fgxqlg8 0pmw. jqj ,z20)h e operation of essentially all electric motors?qhjgj2q;xp wq mzg0 8fl.)t0,

  A circular wire loop lies in a horizontal planesndxm 0+e+sw - /ug1ql on a table and carries current in a counterclockwise direction when viewed from above. At this q e/ us-nlgxs dwm+0+1point, 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 part2n)/gqh wic 9rzix)u) ud9t 8sicle 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 andq)9 2iu/curhdxg 8i z )tns)9w 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 parxhgj ihv8:o53ticle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certa85xg:o3ji hvh in 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 curre2jrctl 9tvzq w6rh2lu4 oh p,a *)i70amm*b: mnt of 0.60 A is oriented parallel to a uniform magnetic c apw)qalb2thm0l*m*6r mvoz:jt 42, 9huir7field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a cur.1;c ifwcju/9b)lwu09f l80su bjk xqrent 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 metert 5 fdchq.8:ys on a straight wire carrying 5.0 A when it is placed in a magnetic fiel: ycsdq tf5.8hd 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 longsr;k, 0ay((gklfnftc t32f5fk5 8aws has a mass of 0.050 kg and is in a magnetic field of 0.10 T8sl2k (a ctfnakks 3 try,f5(g5fwf ;0. 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 v(v2rfz,.sx uo))r-; cck c zka uniform magnetic field of 0.20 T. What is the magnitude of the mag)svc)cvzfuc, kor. zk x;r2-(netic 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 speu8ikeb,au6d . ed 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 ;o al+r.l*bcs a speed 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 nk.d-i pp yg7-wc) b m63olmhgs4m5le3orth 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 spefkd*bqy-u -aeqkw,v -.s :6 zoed 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 spnl*bb l+ cd. j/mn)*h;uyd 5tyxp; 9akeed 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 9xf vywxx 6oujw6882xof $3.0 \times 10^6 \; m/s$ 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 cah,pgmtzalo 5r 7 -2z6nbyg jo 8;q4su6rries a current of 25 A. What is the magnitude of the magnetic fiel ogu 7gtr56na;4ly hz-sp 86jo 2q,mzbd at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fieldet 68vt8n+igg ,gb0wuh hifsb+e43t3 at the ground, 10 m away?,g 43ef68 tehwitnub s0 gt3+vh8b+gi

  How much current must f.vm0yh * :ibgvlow 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 straigd-c6 5hgw1e*glg 2hr6a5 bh fiht wire carrying a current of 5.0 A is the magnitude of the magnetic field d6weh hagdc512g-6*r5lbif h g ue 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 currentxujr0x 5ki2xl m j(*;ps of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a * xp0jmrx2;x j5lu(kipoint that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires car:ju z .y:l*.vbli 8ddcry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wi:ul c8i *bdvlz.dy: j.res?

  Two long parallel wires carry currents of 20 A and 5.0 A inb ja/d:oj4icgm35ru: opposite directions. The wires are separated by 0.20 m. At what point between the two wires ared b/j u4m icj3rga:o:5 the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are pab,krcbwk1f8 6 rallel 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 rkb 1,fw86bkc does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in v kuya+hq./h)ak7s-w der( a5 the opposite direction. The wires are se/ dy(rka )7 hkaue-svq.+5whaparated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular lyjx eb4.(0 u)plhlfvt i1v4 s/oop of wire of radius 4.0 cm when a cubsv0/p.vj1t(elyf u)4 x l4hirrent of 2.0 A flows in the wire?

  A solenoid 20 cm long 4s/ oa7uanj t4is wound with 5000 turns of wire. What magnetic field is produced at the center of the4s4o aa7ut/jn solenoid when a current of 10 A flows?

  A solenoid with 500 turns isycj , ei.ho5g 6atzi9- 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at itszyagj c .9iht6e-,i5o center?

  How much current must pass t2z:uf:y hf +8m3+q xyjknk;p jhrough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the:m+y8uky3 2kj:q +xj;zhnpff center?

  How many turns should a 10-cm long solenoid have if it is to generate abv,: gai3 /5shx :pm9zfsp1es $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 120 turns that carrieh;wnhomhx5 : /s 6.0 A if its /;hx5: howhnmdimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire ofu gz-z /wntsc1+y+hs8 radius 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 magn/syz+ znwu g-1t8c +shetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of czp+n49u7nax *r nozm /vegq (9ross-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 c*ja tki0+ sp4v3o gb3xurrent of 2.0 A is in a magnetic field of 3.5 T. The loop has an area o a3v0 *sbtp4+ojigk3xf $0.12 \; m^{2}$ 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 0av8 shckte:2r/j lq a(h66gquniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic th0a j2 (qshlgkcqrt6v6a/e 8:orque 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 ma 1m 1nvu6:mgr2bdl qk6gnetic field of 0.30 T. The current in the loop is 2.0 A. Wkb6mnmd 2vl g6r 11q:uhat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of axjs7ng s ;r:;trea $0.25 \; m^{2}$ 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 5tizw htt(b) sqzfgtb:+4 0; qparticle (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 velgua2e/f4 rxdd0x7u2 y 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 potential of 1.0 kV and then moves into a ;)j wrw pyi(.v2g, sbdmagnetic field of 0.040 T. What gbw;)wjv 2. isp, ry(dis the radius of the proton's resulting orbit?

  A proton is accelerated foo k n+65q82-saik;vgc9q0 lnftob9 qrom rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it tgokfa25 9o cslvnn+8bi 609qo-; qqkfollows.

  A beam of electrons is accelerated through a potential difference of 10/(glc2ph vqs + kV before entering a l +v p2cs(g/hqvelocity 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?