If the north poles of two bar magnets are brought close to each other, the ic65i3j/)v m99 nc3bc7axw tjk z (ukpmagnets cpz5 7u9xm69jtai)/cv c kb(ink3 jw3will

  If the south pole of one bar magnet is brought near the n6mto1k.mbx+ci)/fs(p s.dqwa mk0 ,worth pole of a second bar magnqdfk6 0t p,1 xw +wksmmob/scia().m .et, the two magnets will

  If a bar magnet is divided into two equai/ +2cpk yy:u9 p/j iqnx-tbz(l pieces,

  The Earth's geographic m7zqip- h.oc:9;u m2lcfi0nrNorth Pole is magnetically a

  The south pole of a magnet points toward the Ear 3r rz5zr11vxfth's

  An electric current produf 1q 3mg(+ni ch*rcn13,z2eaqfuvqx 8ces

  Which of the following is a f4/eqbupzf 5. 53drh;s7xxxcorrect?

  A vertical wire carries a current straight dowg mwy0zuw4s -t47e)ayn. To the east of this wire, the magneticz47 4tu)ye- wsag0mwy field points

  A horizontal wire carries a current straight toward you. From your poi 3/bsdm7xmk. 0 dx6ntunt of view, the magneticdm3 xds xb.u 7mnk0t/6 field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewo3o( gp+ nq)(g. y*/w 6g vudhmx8qporg3aa y0ed from above,op/hyx6gg.(d3pq wom nr038aqg u +y g(voa)* 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? The magnetic field

  A current carrying circular loop of wire lies flat on a tvi(2 ,oqaa8d*x5r f z hc6ew9gable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of therhzgi q,w5o8c9a 2 *aevd( f6x magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is thegmo5uwmbyke71x -4x m*:m gf6

  1 T is equivalent to*j n h8uftb,*z8rptpu2)n5b e

  The direction of the force on a current-carrying wire in a mag *- id)zjdesa+netic field is described +ad *)j-zdesiby which of the following?

  The force on a current-carrying wire in a sc,-5wv9qqyfwv p*a+6+ xcnm magnetic field is the strongest when

  The force on a current-cn -xa-9n c,mkgarrying wire in a magnetic field is equal to zero when

  A vertical wire carrie(uiy v68 -aqiss a current straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force ona8quys -i( i6v this current?

  A charged particle moves and experiences no magnetic forcsu.. pprzquudr-vz:a 0em/ 9; e. From this we can conclude tdrerupqs avu9 p;-zm/.. :zu0hat

  A charged particle moves with a constant speed zw )t6wey-,* ;. t2jjeccoyc tthrough a region where a uniform magnetic field is prcjt *j ycyte;c.2,zeow t )-w6esent. 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 obv4+ k7 a7uons-; 6k:obuwzb constant magnetic field. The magnetic force on thibsbzbk7u6oo n +vu-k7 woa:;4s particle

  A charged particle is injected i2nt unevlx j qhq.3-p /f4km8)nto a uniform magnetic field such that its velocity vector islknt /48)u3eqhv jn .2mq fxp- perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed vc,tt6a69 f76 euc i2 qe.q;ajjy0 kiztraveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, 6706zjev atjei 6ac.2q9y;tcuikfq, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cir6 f;g j xr+b +arp8g6t;brfw:cfe8c-k cular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius wfpb -c6k8a;eg : f;6tgrcxr+r+j8b fof the circular path would have been

  At a particular instan40(vf rn;yvt .yz2 bxsf9v,frt, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it i 20vn, z xff yy9f.bv(t;s4vrrs

  An electron has an initial velocity to the south but b d)vow g,ak s, hx87if1*a)ckis observed to curve upward as tho1aavc 7k)w, *b, xghki8) fdse result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters)dirhnft82 j8;n -imw a region where there is a uniform magnetic field in the +y dih jn88 ndfw2r- mt)i;irection. 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 2o13 vzt nb/kra long straight current-carrying wire is

  At double the distance g7psr 35m2i x6hsgw2e umg-w/from a long current-carrying wire, the strength of the magnetic field produced by that wiue-r 7 3g2s/ pm 65wxh2imwgsgre decreases to

  Two long parallel wires placed side-by-side on a hoh* v inli3f (yb8;ypyt3m4r7crizontal 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 y ;nmc7y (thyv l8r*p3bi3if4your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-4y :kazmkv(qf ki:9jo d e//j8by-side on a horizontal table carry identical (8j izy ak:qv:f /m9ok4edj k/current 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 currentmqnl9 h :;ike(*4qq qmlf* oa2s. The magnitude of the force between the wires is F. The current in each wire is now doubled. Whq:mqol ekm *429qnhfq(li* ; aat is the magnitude of the new force between the two wires?

  A long straight wire carries cto x9 ha5 w;yrw4lnzg,oa+ bkcft)4:-urrent toward the east. A proton moves toward the east alongside and just south of the wire. Whatf+ltw tn hg)a;:-xbzck54 y9,ao row4 is the direction of the force on the proton?

  A wire lying in the plane of the pa)vn pb4.xcz8 tge carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron tha8.tpn 4c)zvxb t 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 horizontal table. If thr8lts-( op0xjnuohn; r-ie31 e wires carry current in the same direceu8 o(;s tj hr1n3px oi-0r-lntion,

  Two long parallel wires are placed side-by-side on 0)w zdkon4urnxh/ m3/a horizontal table. If the wirem x )r0o/n3u 4/dnzkwhs carry current in opposite directions,

  Consider two current-carrying circular loopsm9ff+(sd a c i.s/rq;a. 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 cente rs+(facdi qa/f9 ms.;r of the larger loop is

  Consider two current-vgg87p, po 3vn:xdd i8carrying circular loops. Both are made from one strand of wire and both carry the same current, but onevpgi dd3nxpg8v7,:8o 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 carry osx52kzrtm ),ing loop occurs when the angle between the loop's magnetic moment and the magnr5) ztxs2,kmoetic field vector is

  When placed askew in a magnetic field, a current carrying lopxyzj*y+0 k,ivcjkcido7i4,+t s-g8op that is free to rotat74 zydoki,tpvgc8y0s *+xk- ic i,jj+e in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially allpr:omg.bi k1mnw. :5 h electric motorsg..h:m1w n rkm:po5 bi?

  A circular wire loop lies in a horizontal planewq:vza nd( j9i(m,8so on a table and carries current in a counterclockwisdnw ,mz(vqa(9ij : 8soe 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 the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is ac9j+ q+rcoba4 0:xkx ol+v* rxqcelerated 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 vxvkb:q04rq*+jo9+c xlr + o xaelocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists;d o hdj(t cjoa9g063z 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 certat3ahzjdogd jc;( 0 o96in 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 oriente.tnerra; rik m2;*tutlhiff+x35+ x) d parallel to a uniform magnet rrx+)i2f+r;ttn.t eh mufl ka3;5x*iic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currenvrui.. ,aczl uq,js n4wn:-v0 t 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 meter ona;3.p;:bjzp-.kbxx+yywq yx a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an ang.xp xya;-qb x: jy3by+;.zkwple of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m l92soy0dyx bjz9x nr--ong has a mass of 0.050 kg and is in a magnetic field of 0.10 T. Wsx9y2 r-9n ojxz-0dbyhat 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 uniform magnetic5-m i i4:+a dzswxsckg( k39kv field of 0.20 T. What is the magnitude of the magnetic fo- 5asvd4sz :k9+kw3cm gk(iixrce 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 speey :ay: q2a+,lsq/wz(wcr3 jlw d 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 atm 4y)io1h*h nx4 jo6speed 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 dueo f( -,*j xqg3dj 9k33ab eo1f;rsufdf north 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 speec; )1wflzth el rl9e :s.8p5xy 4jfm(qd 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 of f vk-k0e qrmhv56c1 0-e8bkkv$8.0 \times 10^6 \; m/s$ 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 of t95mw o mkuiv( cj4acl5 ty3;aii 2)0e$3.0 \times 10^6 \; m/s$ 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 mt 3xm) orl-jq :f:mo4kagnitude of the magnetic field at a distx):q jr-3o4l:kfmm otance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic s 1zpk:e7ocl/isu 5 g-field at the ground, 10 m awa 71 :sceu i/ko-gz5lspy?

  How much current must fmqj+ +ygen.nvl o/u7i8z c70elow 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 p)-q yso o,v+d3 ;tp nmznkp*)A is the magnitude of the magnetic field due to the wire equal to ovd) s *k,p+mp-to pqyn)3;nz the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cbx h,4 pos--aqurrents of 10 A in opposite directions. They are se4- bps axh-o,qparated 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 x ;s.ibsmp2p*gb s* my,q:w,g5.0 A in opposite directions. The wires are sex :**2.,bm wps;gsypg,s m iqbparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A *xtqos(itmna02i+ z: in opposite directions. The wires are separated by 0.20 m. At what po n(xzq :ms*ia+tt o20iint between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A 7 pqld,u(n6ru5 h b2wvin the same direction. They are parallel to the z-axis, and they pass through the corners of a sw,6p nvu(l u72b 5qdrhquare 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 carry currents of 5.0 A and 8.0 A in the oxd9b ::+ mk0gugm, mampposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length bet,9a0gmk ::+gubmd xmm ween the two wires.

  What is the magnetic field at the centejroa.mhuht 5+:u/ ol1 r of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flowsu+1r hum:o.5athl /o j in the wire?

  A solenoid 20 cm long is wound with 5000 turn*qfa-/td)jz+tzuo9ykc l/ eo/o g4 s6s of wire. What magnetic field is produced at the center of the solenoid when a curg// 4uz)d *jcoktqo/sat 6fo+l -9ey zrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a0kro:e e e+f+a current of 4.0 A. What strengk: eea++rfo 0eth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 ,l2 ltn 4(tiylcm long to generate a 1.0-T magnetic field at thet4i l2(tln,yl center?

  How many turns should a 10-cm long solenoid have if it is tb+j(q 8gx bat:o 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 carriegpaetkc7o9uci)z8w o3 jm 01qe 5,d 2os 6.0 A if its dimensions a378o edt)ioa cwk2u5pq c01 mz 9oj,egre 4.0 cm x 8.0 cm?

  A circular loop of wire/roolq c/:c+fr 1zv( e of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. ( ov:lro+f/qc z/ec r1What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire ofvz b/4e 9dt,qr 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 curresxih jii t/3:7s x*5ypnt of 2.0 A is in a magnetic field of 3.5 T. The loop has an ih 5ij*psi/s7xy3tx: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 magnetic field oft5ksla)kojw t. .p;sul+hi6) 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the polk )us5 hs aw).p6;+lj.ktitlane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniformu frl z+hd n),4lfjqf586ylb/ magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic to64ybf l+n flzl)5q 8fr,dujh/rque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area f3u pi t*36f(;2kvxjyjrze ,)8 fyjzm$0.25 \; m^{2}$ 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 ede8 a*l* fzkd/) 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 veloc s7-qp1vea gasz ym6r2)2 lo)e(4dnxsity $6.9 \times 10^6 \; m/s$ 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 inu eoyhkv5nd; ; 2c8/bnto a magnetic field of 0.040 T. What is the radius of;5y/nhd o2e8; ncvukb the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. t8fwn 81 ldv7tn,tawfm :xctr/(2:fcIt enters a magnetic field of 0.30 T oriented perpendicular to its dire7 amwn8ndr 1t,xlf2tcw8 :/cv:tt (ff ction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV beforrnbfby/c9 b- w)v/:eve entering a velocity selector. If the B-field of the velocity s)cbvr-f /n 9e:bvbyw /elector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?