If the north poles of two bar magnets are brought close to eacxa+ kw3i )f qww:akq8./bbc h3h other, the magnetq:kwbx. a)3 ak cih/wbw8f+q3 s will

  If the south pole of one bar magnet is brougha ji p/vzq.n v+cl2m kl/c6+(qt near the north pole of a second bar magnet, the mqv( /lcz/6aq+ l.+pvkncj i 2two magnets will

  If a bar magnet is divided2et n3nj9j(cssm2 s.2od d l:b into two equal pieces,

  The Earth's geographp 7r6 f--inqxgvyf* 5fic North Pole is magnetically a

  The south pole of a magnet points toward the9zbq v 9myl5o +t4mj;avzp,c + Earth's

  An electric current pro00: mjytj lyt,skxk8eo5l41yy 5m6khduces

  Which of the following is c+ag n noj2r)o8*l e-eakj*7xoorrect?

  A vertical wire carries a current straight down. To the (a: fl. .kcd3qzcgu. ceast of this wire, the magnekac:.uc.3g. z(q cdl ftic field points

  A horizontal wire carries a current straight toward ytazt 2-ep1 +mvou. From your point of view, the magnetic field caused mvt2 +-ae1tpzby this current

  A current carrying loop of **e0h3g jgylwejq2 1nwire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnej*0w1q *eng2h ygj l3etic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. tdi xi v+,e6*h2r3j 6 .rrrukbWhen 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, insi u,3ri kv.rhb+ trxj d6ri*e62de the loop? The magnetic field

  The SI unit of magnetic field is th /(eaur q(zsv5e

  1 T is equivalent toxn;vyn10 k e9 d1o-cl;c.ww mv

  The direction of the force on a sg dwg125v93xi(r vx poeg 9(ccurrent-carrying wire in a magnetic field is described by which of the 53 x vr29igd (1sp(wcgvge 9oxfollowing?

  The force on a current-carrying wire in a magnetic field is tukwc51 i/dk a.he strongest when

  The force on a current-carrying wire in a magnetic field d3nefslr4 f78s qmmf :08 mol.is equal to zero when

  A vertical wire carries a current straight up u y (r vv0)s (sekc9p;x3yhdho52z2c phuyu/, in a region where the magnetic field vector points due north. What is the dires o/hydh(3zx s02)ppu5u(v9r 2y cv,hy; cku ection of the resulting force on this current?

  A charged particle moves and experiences no magnetic lob* a gi2b+l-force. From this we can conbbl+*lgoa-i 2 clude that

  A charged particle moves with a constant speed through a re1 d;58+jr6qtlv xpk 6slfd w6ggion where a uniform magnetic field is present. If the magnetic fie kpsdvf;xjt16 q5l86lrg6wd+ld 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 me*.yj. m;xr(dm:ef a. The magnetic force on this mm*xamref: dje.. ;(y particle

  A charged particle is i6mem m -t k(ceg xnv26nf8kf2,njected into a uniform magnetic field such that its velocitkevm gnfet(k662-,mnm 8cfx 2 y vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observe 58f gil )(f2c5zxnkvnd traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fasti ) ngvkxc 5nf8(5lf2z, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform mag pz,iw*.w9hz bs7rvv; netic field. If instead the particle carried a charge of +2e, the radius of s;,*b7pw zhivz.9 vwr the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a4verho0limt(at* ) cvhh 7i1 7 uniform magnetic field that is directed straight downward. The magnetic force thatv*i7 o h07c at()eh 1rihmvl4t acts on it is

  An electron has an initial velocity to the uxc3vzp.g91p;dk /. uaw.p zjsouth but is observed to curve upward as the result of a magnetic field. The di; /. pvppua1cxz 3j..zgdwuk9rection of the magnetic field is

  An electron moving along the 70r*r :frke hh+x axis enters 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 therhf:*r 0e 7rkh page.)

  The magnetic field produced by a long straight current-carr /vvzowyw w v )22cve;qlv7.0fying wire is

  At double the distance from a long current1+ry z9fk,jff-carrying wire, the strength of the magnetic field produced by that wire decrease,9rf jyz1kff+ s to

  Two long parallel wires placed side-by-side oi.i9lt1 hj jr5 tj/ck2n a horizontal table carry identical size currents in opposite directions. The wire on your right carricij5 9tjl2j 1hr /k.ites 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 placed side-by-side on ( ,wxr4j3y4j w i3iu hbvn.de(a horizontal table carry identical current strj 3 evdn3 jxiw(b(4u,. wyi4hraight 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. g/4c7gu x yjh-vnt.zej,k4 n: The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitu4ng4tz .g j/:v ukej7,nx hy-cde of the new force between the two wires?

  A long straight wire carries current r, 3ibezsk 1m6toward the east. A proton moves toward the east alongsiz imk,163rs bede and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of thcb:z7j cgr+c8:ea bj co-bk0c4dzu)3e page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on0j bd-c78corb kea c b: z3+4ujgc:cz) 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 horizontal table79mevza h t k663pb-tcxi2+ia. If the wires carry current in t6tbt9e i k i 6x-+c7p3vm2hazahe same direction,

  Two long parallel wires are : l . tweeq,mj2q.7fud/s.ferplaced side-by-side on a horizontal table. If the wires carry curref, j:rldfe s /ew .qe2qu7..mtnt in opposite directions,

  Consider two current-carrying circular loops. Both are ma w(2 fvly 70ir s*auk0mlg)uo3k6oe2jde 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 thw0s0kgei)k of u(la3 ru*6j2y7vlo2 me center of the larger loop is

  Consider two current-carrying circular loopsixnr( uzf,5qiq-;0g gqq:( es. Both are made from one strand of wire and both carry the (qeg,rq(i:q0 n-;zu5fq x gsi same current, 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 z7v.:umw kpa- between the loop's magnetic moment and the ma z-km.7pw :vaugnetic field vector is

  When placed askew in a magnetic fsg: ke v y4eqp8y8)f-aield, a current carrying loop that is free to rotate in any direction wi q8avg:-pyyefe48) ksll experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially o hwsa5m/ipt*va3 o 4z5o*e+hall electric motors3 h4 55paow* /*o zhesaviot+m?

  A circular wire loop lies in a ho+ nsc9q0,1r22d0amv gsvevv.fg5+bbz g vnq- rizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points9d2nbe.z n+ 1cqvgv5gms00v +2 vqgsr,b- fa v 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 accelerate wg u-b. ka;frr2(n(dld through a potential difference V and allb2rugl ;wf(. d an-k(rowed 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 consis+nw nj(h51j2ytc-an l ts of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite diren -( +thn15wjnja 2clyctions, 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 0.6 tcc4po5sl9h40 A is oriented parallel to a uniform magnetisot44cc p9l5 hc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr* +ch2ds3jti8kzw7 taent 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 on a straight wire cl dpy8abl: oy75f4f7tarrying 5.0 A when it is placed in a magnetic field ot f8 47balplf7yo5d :yf 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 kvqtlhyh,r9bu 10 51d n.r hc:vg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the myhhb5 19ud0 qh:n trc 1,v.lrvagnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magnl* 7 h/p2nbjcritude of the magnecl7/2bpr h*nj tic 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 speesba20cjsj6n x ;x 8ap,- 3cowid 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 ad9,h5.nqh ru ewmy)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 k2 ;6gl;2yzz ot)j t):pztcr wdue 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 sncy; ;yr u0q7ypeed 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 spenp5 -070d9hei g ywbuded 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 of ybcg/x*in emk i f2u nwl95/0-$3.0 \times 10^6 \; m/s$ 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.qj9nv g4qi7 e7 What is the magnitude of the magnetic field at a distance of 0v7ejn7q igq94.15 m from the wire?

  A high power line carrying 1000 A generates what magnb 4 9eg 8z-x2ccm:srgoetic field at the ground, 1c r-4sxgbc8zgmo9 2: e0 m away?

  How much current must flow f /hli .b1rni4kbrha2 4or $1.0 \times 10^{-3} \; T$ 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 8v+i/ pbnkos /A is the magnitude of the magnetic field due tovb o+s/ kpin/8 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 currents of 10 A in opposite 6hp b vtaie 0/mc98el1directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point thmci08 el6t 9ea/b 1vphat 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 opposr -8avasb h2 :yejib(2ite directions. Thesi ryb2v:8aah ( 2-ejb wires are separated 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 in7f+tvr8-4c.qj6m bq ek1xc ze opposite directions. The wires are separated by 0.20.ecx jbe874rfzmvt +q1c6 q -k 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. They+aink , b2v6fe94cue ks9q 0g1yw s9of 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 q1209kweveka, f 6bcsy os+i9f 9un4g experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in th),mg-ripc uw71ws. h x(wrf2te opposite direction. The wires arrf(1wh)xw-2m w .cp itsgu7,re separated 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 o 1 /hj)gkh/ae1qgey2circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirg/ 2q1ao 1/egk)ehhyje?

  A solenoid 20 cm long is wox kh2fvcyk 5.,(v,s b:zb-nxc und with 5000 turns of wire. What magnetic field is produced at the center of the solbx5 .fz, v,yvs:bx2k-kn(cc henoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current l ,ga sp6 pzisi5k*)im,t)x/h of 4.0 A. What strength of mh /*k)iiga,l)zpsxmt5 6 p s,iagnetic field will it have at its center?

  How much current must pass through a 40hs0m w;cau u;:0 turn coil 4.0 cm long to generate a 1.0-T mag;as umwhu: ;c0netic field at the center?

  How many turns should a 10-cm lonk 0nefluh4 al4m i.+y6g 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 79y3+vdh3 fqm8 nc0/hvtpbo g120 turns that carries 6.0 A if its dimev/g98c30 +hmv3nb fdh yqot7pnsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field5,9njh.g+aj1 xmp eyh of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when jmpg.h9 a1n5h e,j+xythe plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of uacy4xw p5*li,baiq) d f/c5: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 2.0r4 r k *x 2tx1g7mj6zavei c6x0(h/mwk A is in a magnetic field of 3.5 T. The loop0jz*m c 2kgxh vartx (m4xewrk67/61i 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 8:catv 32bfvtegb9/s hwui8() 8lan zof radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in 8becs(n3afazv9bug v : 8 8htwti2)l/the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is i 1vpd;dc rbn;)-uw5xzx:vf2 jn 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 tvf1 wc; upvrjb:x-xd5d;) z 2nhe loop is parallel to the magnetic field?

  A circular wire loop of ar(tr0 4jczult *fh,d2oea $0.25 \; m^{2}$ 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, ajinzi dw2 3af;qmg8* 7 single-charged 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 wit8,gz 9b;fo u7wcyqkv- h 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 moves into u b z2r6ska6ygl( bdyy(pwkh:)wb lc/9/l/6ca magnetic field of 0.040 T. What is the r6cub6ry6(kz(9 sg phyw2/: l lwc)b dl/y/akb adius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Itdawgx/)cep+; enters a magnetic field of 0.30 T oriented pex w/+e)da g;pcrpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 -70 qu+.9qj xrfnjxygkV before entering a velocity selector. If the B-field of th79yx + -qungjf0qrx j.e velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?