If the north poles of two bar magnets are brought close to each other, tuqx ki;rgo; u6/2x7eq3 e ku ,8l2mkxdhe magnets willo/;3l q;xirkm6eeuxg ku 7 k,uxdq22 8

  If the south pole of one bar magnet is brought ne( i: . shly2wsumme)u;ar the north pole of a second bar magmy :)s;(muelw2s . ihunet, the two magnets will

  If a bar magnet is divided i4c:qd 6)u r e6.skgnbunto two equal pieces,

  The Earth's geographic North Pole is magnetical0k; xi.q1usvkl/ad0c 1ja8gwqx n d3*ly a

  The south pole of a magnet points towardexiuv5zu /4w q9/n +wk the Earth's

  An electric current awue 3t)) ud)msre3 v3produces

  Which of the following is correc/ 2s/e,5zkbgr 9kspxuv ;khi:t?

  A vertical wire carries a current straight down. To the ,d*5nvg* y iz 6wsdy)xeast of this wire, the magnetic field s yd5y n),ziv*x*6wgd points

  A horizontal wire carries a current straight toward you. Fro- i7djmk; 8b8hptwryr3 +o93jm gct;vm your point of view, the ;ib trv3o wk8 39- m+ry;pcg8m7jtdhjmagnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When vie)fj02* kkp fnmwed from above, the current moves around the loop in a counterclockwise sense. Wmkf n0kf)2 jp*hat is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of +jizsu *4ch: twire 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 magnetic fie:+j *hzitsuc4 ld caused by this current, inside the loop? The magnetic field

  The SI unit of magnet: 1m 95ofh 7etaw7cj(gt9 wwvsic field is the

  1 T is equivalent to7fswzjfv1f*vz e1 5p6

  The direction of the force on ath.sw4 96e chh current-carrying wire in a magnetic field is described by which of ch hh9sw6et.4 the following?

  The force on a curren/.e-y( qw xnqdt-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying aj) .vxdb5omh(0cqe2wire in a magnetic field is equal to zero when

  A vertical wire carrie ms)eo4(tov.s:k 5on e me6.pcs a current straight up in a region where the magnetic field vecp nt5mmokoe evs4( :os6.)c .etor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fmd.gc5((cjbm os 2w/arom this we can concl5ma(/ 2mdc(c sg .bwojude that

  A charged particle moves with a constant speed through a region where a un) mfl0l t0o 8wlusp :6e -unh4hjtjz:8aij9e. iform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this parsj.00n u 8:ieafe)u469l : l- otm8wzjjhplthticle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forch*o/o 6elq ps+e o+ooeq/ p6s *hln this particle

  A charged particle is injectemstv 3h tb69m0d into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the part9mst3v6 bm 0hticle will

  A charged particle is observed traveling in a circular path in a up* fh;blkbxy( ame,60niform magnetic field. If the particle had been travl ekb,pab(6mfy *hx0;eling twice as fast, the radius of the circular path would be

  A particle carrying 8 7znf-- (cbgk hzi6ica charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radi cng(6hzi7cf-ib kz-8us of the circular path would have been

  At a particular instant, an electbaka;p 0r34do ophp9*4:k 5 wile:fcuron moves eastward at speed V in a uniform magnetic field that is directed strb:9 klipka30c;fu:d*wh ppa 45r4 oe oaight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observey k sp2,w*kxhne z0j/1d to curve upward as the result of / x, e1hz20s*njkwypka magnetic field. The direction of the magnetic field is

  An electron moving alonw5ydcw2zcso8t )ove* j10p tr.p- f. lg the +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 r5sw.p8t)2e0 *o1 c.-pzdrwtf clvy joight, +y up, and +z out of the page.)

  The magnetic field produced by a long str: fx7(onsioic;mk*p b, p,h/m aight current-carrying wire is

  At double the distance from a..ovj ,chub cu2ef+4g long current-carrying wire, the strength of the magnetic field produced by that wire deccu v h4,+ej .guc.2ofbreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identir*xj4quji4 :y cal 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 fij i4:xqr4*j yueld at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side oe9u58onoq *jqe3cp i(g ;bx o8a-w dp/n a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between do-uq xg*w59 jq a( 3copebei8op8/n; the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betwee5 4 ,jgoq:atkyf1evg (ie15 kdw4h-ncn the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between t 1na:fe ikg, o4(c1 4yek5v- 5qgjtdwhhe two wires?

  A long straight wire carries current 2ft(,yyd+fly;c ar 6 pyhmw-)toward the east. A proton moves toward the east alongside and just south of the fy,rm- ph6c+2wlf ty(yday); wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a pg* wblc75 )jgcurrent toward the bottom of the page. What is the direction of the m5lp)bj* 7cggwagnetic 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 place*buxicb 3i-x7 oy2d6nd side-by-side on a horizontal table. If the wires carry current in the sauxi7yx*b2 cdb o-ni36me direction,

  Two long parallel wires aogtq( o1*,cp tre placed side-by-side on a horizontal table. If the wires carry current io c(p* gott,1qn opposite directions,

  Consider two current-carrying circular loops. Both are madenw+x 9u1 vr/ c))dfnbs from one strand of wire and both carry the same current, but one has twice the radius of the other. Compa)9 r1)buwncvxnf+/ dsred to the magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carryiwbqpu ;e:7 e3eckaqfp2+5i ,xua0yr 5um r3v1ng circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the rcaq32:rbpr+, q5p a1ke3;i u5 0 uexuw ymfe7vadius 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 between tcko8jr z.9x.j he loop's magnetic moment and the magnej89o.x. jck rztic field vector is

  When placed askew in a mag/(k)dy(m o k ja(/ -ua-ttzurunetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vyju (- odtk/za )(au (k/u-mtrector

  What fundamental fact underlies the operation of essentially all el +v8 hy0esqxy9ectric motorsh +98xyyeqv0 s?

  A circular wire loop lies in a horizontal plane on a table and ceikt )fv8+m 7narries current in a counterclockwmvf+e7)i n8ktise 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 5uvo4y d o3u0sm 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 partic5vud0 4u oso3yle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charz4:d ka elbb,/ged particle passing through crossed 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 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. Wha4 dkbe:az ,bl/t direction should the electric field point?

  A 2.0-m wire carrying a cu s0i:8b 5jhijprrent of 0.60 A is oriented parallel to a uniform magnetic field i85p bh0:ijsjof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of.8 ht5roiu(c m $30^{\circ}$ 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 ca,.ewk*ba fuy0 )x2pu8m zv1pdrrying 5.0 A when it is placed in a magnap zw1kbf.yv8*m ux0 ,e2 )dpuetic 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 ma60pz8-y b-0sib48 lj5 supubh9odbry ss of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rodjb ub-ob yu zd9sy4805bsli-rh8 p60p?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is th5uw mc0b;354bqksn p pe magnitude of the magnetic fb;b4w5um 30 pn5kpqcsorce 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 spevn*v* -mtc mo03dy ue/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 a d 8j;xte51k *n5/zyircfez0m 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 north with speew9 c1o;2g0*ajyi;jhed,w zb fd $4.0 \times 10^5 \; m/s$ 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 speed of g 45oqrz6rui8 $8.0 \times 10^6 \; m/s$ 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 witr. m(p lf kyo nfk(xoj*jh290:h 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 acceleration of the electron.

  A proton has a speed b vt2c;cwed9 s. 5;t7hkx3 p43cogzg vof $3.0 \times 10^6 \; m/s$ 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 /vwls,l,0odpt/q9 koio6, bawire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m ,v d,o kto9 lb6 o,sqa0p/liw/from the wire?

  A high power line carrying 1000 A generates what magnetic fielliu-ig3nx b nu h.v 2).9)xywxx 7w1jld at the ground, 10 m awayn9g)lj7xwx-ubwx)y u.3 1.n il2 xhiv ?

  How much current mustav 5;gv.zqw t9 flow 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 cur8-iq5 aticos (rent of 5.0 A is the magnitude of the magnetic field due to the wire eqtq5s8ca-( i ioual to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10i/snb(y-lxyai- i-d-j+b e) o A in opposite directions. They are separated by 40 cm. What is the magnetic field in -dxl- y-o- i+i/biejya(n)bs 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 currenie5l,kjv3hx nti 4 6x*n9)npbts of 20 A and 5.0 A in opposite directions. The wirli5, txb9jp6n* ) nx3ihnev k4es are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires car 8co2of). g; gb 6stv,wx6e+2wvpciou45fb rrry currents of 20 A and 5.0 A in opposite directions. The wires are seu itwr5rb4 ,6vowcfgb6+8o2xsv.; 2 e)ofp cgparated 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 directic( 1m;tpkj7yx on. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned i jc;(xp7kyt1 mn 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 i yjd,npz,-7 f h+.(/jihbzlp A in the opposite direction. The wires are separated bj,7 zh,f+.b (z-j iyhndipl/py 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 loop of wire of r.r.s/+d 6l:x9 kamj3 i )nd3o yivxazjadius 4.0 cm when a currentlaz)rs/kod .3yj m 93+6vdix.i:nxaj of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound wvq4texe 8 0tq(ith 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 0x et q(qv4e8t10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrieww .k8at-4kpos a current of 4.0 A. What strength of magnetic field will it have at its centowwa .-k48p kter?

  How much current must pass through a 40sjp t(n -kq/8j0 turn coil 4.0 cm long to generate a 1.0-T magnetic s/j pqt -j8kn(field at the center?

  How many turns should a 10-cm long solenoid have if it is to7dz/5jxv9 uvu generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular ls;muls ir- hgw3)r,pu; o6nu ,oop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cs;,wiso gru,h ;nlu)r3 ump6- m?

  A circular loop of wire of radius 0.50 7 kkfdrb*tc18i,esk , s9zdo/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 perpendicik t*bdkfsezsr ko,,d7 9c 8/1ular to the magnetic field?

  A circular loop of wire of cross-seiaon ..w4 1lhictional 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 A is in a magnlz1s m)fzg+a3 p n8x8cetic field of 3.5 T. The loop has z f8lgazc8 s)+xpm1n3an 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 iz* ,p-ix :tla:kx2gfhyjn7 q-s 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 loopx-na,*fkyql2x7ip j:zh g -t: is parallel to the magnetic field?

  A circular loop of wire of rad hj0+lp+. kui0/nmhr:d,8a:iahzg la ius 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 magnetic torque when the plane of the loop is parallel to the mani,8ha+k ahzm+u. l0l/g :r0ihpajd :gnetic field?

  A circular wire loop ali yo7iz,0 e2+1ots rof 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-charged particle (charge l3+c1s5i qq xze) 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 velqt8lrm) ligdm6,m)(3d:r h xy +a*ju tocity $6.9 \times 10^6 \; m/s$ 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 kz s ur al:f-d0xfoc/;+V and then moves into a magnetic field of 0.040 T. What is the radius of the proton's res+d/z oucfflr0:x-;a sulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnkt d7 9zn4efz1etic field of 0.30 T oriented perpendicular to its direction of tfzez4 d1k 7n9motion. Determine the radius of the path it follows.

  A beam of electrons ip6uhhwirjr8. y7d 4 0jsn jo4:s accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector hyhu0d7iwj r4 : snjpo6j.r4 h8as a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?