If the north poles of two bar magnets are brought close to each other, the 1j1fl/82(kzo tnasgb hb 1q.i magnets wi.bon8f lt1 a z112/qbs ijk(hgll

  If the south pole of one bar magnet is brought near the north pole of a-5 -ylu,jn 4qibebvh, second bb,5 ,b-vu eqnil-j h4yar magnet, the two magnets will

  If a bar magnet is divided into two onvew2 62akx*equal pieces,

  The Earth's geographic North Pole/ohg;fphv12s(z*/1p7ad 2zexalo k m is magnetically a

  The south pole of a magnet points toward the Earth'n+-dz9qeomt0t.s*k 2t rcl 9ss

  An electric current produzqrr1 n3 w:4npms/de(ces

  Which of the followix-rey/,b oq w4ico45q ng is correct?

  A vertical wire carries axnu e 8+s.vavk-f9,s 0x xd/e md/6nkd current straight down. To the east of this wire, the magnetik9e8xxkv0af snx ./ +v-mdds,dn 6/euc field points

  A horizontal wire carries a current straight toward you. From / ,k pykg29txryour point of view, the tyx rpkg,2 k/9magnetic field caused by this current

  A current carrying loop of wire lies flat on a table to-3vd2amzv*qub7 ,k)q/rtbcl dio 5/i p. When viewed from above, the current mov maiq7* z2kiv-/o c lvdb rtdu/),5b3qes 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 cirg kt2aol(61fysvt) 8lcular loop of wire 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 field caused by this current, inside the loop?at(tsgl1 6vk8)oy2f l The magnetic field

  The SI unit of magnetic fielz9)l gi),btuqd is the

  1 T is equivalent to+f9j.7 okljg/kz ghn-

  The direction of the force on a current-carrying wire in a magnetic fielfqz*ot.(hw k2c)z 2: 8boxqpy d is described by which of thz( zwp th82bc. 2o:oy)qf*xk qe following?

  The force on a current-carrying wire in x*;d ltcp67cxa magnetic field is the strongest when

  The force on a current-carjm7fz5,lhs87 x p:rbc p8p d/y og-l7grying wire in a magnetic field is equal to zero when

  A vertical wire carrijx7qr, g(zq jk4l*e1aes a current straight up in a region where the magnetic fielqj (lkg aj7x,1*z 4reqd vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From t eviy(glafce7 :.;.j khis we can conclude t f. eavjk7eg:c(l.iy; hat

  A charged particle moves with a constant speed thrb2ebdbh:44r6rfc j6 aough a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on thibdjeh 4:bf rr6a6 2bc4s particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. Thewyf*i3(,tsye ivbe 53 magnetic force on thtbs*wy, 3iy ve3ef5(iis particle

  A charged particle is injected into a uniform magnetihs m152v bfqm9c field such that its velocity vector is perpendicular to the magnetic field 519mfs mb2 qhvvector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a2 s)gay 80l 2zhyqzyv5 uniform magnetic fz8 ys lay5vygq )2z0h2ield. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in aj-0fq: y* /k j.16fe fxueggqv circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would hav0qjf/qyf-feuk ggxvj. 61* : ee been

  At a particular insta9hu t w;xdiz xh, jgcw)km tk9245p517jf6xjmnt, an electron moves eastward at speed V in a uniform magnetic field that is directed st tmwj6 xxmj 5fhz9dk29x5,uwg1tp j4)i7kch;raight downward. The magnetic force that acts on it is

  An electron has an initial velocitedc)m b 5l/o. s2q0kgm-iw 3rey to the south but is observed to curve upward qe 3d-oi.kc2 g w0)re5lmsb/mas the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axisuso7q h-3xzlu; rp)d5 enters a region where there is a uniform magnup3hqdo;-l7 )x zusr 5etic 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 the page.)

  The magnetic field produced by a long straight curren o)2 z(p9 f*.xa;qlon fsfr ni(5c+l:a1y pfzpt-carrying wire is

  At double the distance from a long current-carrying wj7nc3ip km5v5 i5xm 2wtl:v3aire, the strength of the magnetic fieldmpx 5iw5im 7 jtlvc: a33k5nv2 produced by that wire decreases to

  Two long parallel wires placed side-by-so. 3q 8op+:zmliba ik.pf 32rkide on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the kr ka3:pl8fm+..3 2qbioo ip zwire 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 a horizontal ta9i/.cv e e/ryfble carry identical current straight toward you. From your point of view, the magnetic field at .ire9/ef/yc v the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitutpoimeo-e, isf3g ;kr 7 562d6qics (hde of the force between the wires is F. The current in each wire is no t-p66ds5,k23 m ii( i7ercogsqh oe;fw doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carrip eg.j8 3ln(z p:8fedles current toward the east. A proton moves toward the east alongsidedp(e ne8l8plj .3g:fz and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the7brh0x x a,est:j0 )za bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in axeh x t,j7)0ars0 bz:the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontaic+*f gho6hnkk p1 :ibkl5:,g l table. If the w+6f5 1nb c k:g:*hik gphio,lkires carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the 49fakg 7fk6au- v)3iun ju,sw wires carry current a3,u9ws7-6jgvafufun 4ki)k in opposite directions,

  Consider two current-carrying circular loov y 4f end-*25v2wkyfbps. Both are made from one strand of wire and both carry the same current, but on2enk bvyvf f-y *dw524e has twice the radius of the other. Compared 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-carrying circular loops. Both are made frv0qt,6g f6h+o x5gpwm0x tlp )om one strand of wire and both gql,gmt ph+05x xto ) fw660pvcarry the 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 curren3bj: o szp0z m)zs1sw.t carrying loop occurs when the angle between the loop's magnetic moment and thesz wjp1s0zzb3.ms:o ) magnetic field vector is

  When placed askew in a magnetic field, a current carrying 8cxu o2a ,8n*xxfqo 6jloop that is free to rotate in any direction will experiax2xo, uo6cqn 8xjf 8*ence a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electri3ubrv q/ 2jgz8c motors?r2bq3v 8zu/j g

  A circular wire loop lies in a horizont7 dcgo 8nis98wb,mtc(al plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Etw 7g89mc s, b8(ndicoarth'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 spectrometeb 7-dd(huu:zjo7+y vdf. kqn,r a particle of mass m and charge q is accelerated through a potential difference V and allowed to enter an(uq-fo7hv k+zd. d, y7:bjdu 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 gzf 4ooq5d(;c8wq. qz a charged particle passing through crossed electric and magnetic fields. The forces ex fo8g5cz4q;qo (zw.qderted 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. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.6w yhvnmw. a4w2-o4 2tq2pn 5dz0 A is oriented parallel to a uniform magnetic fieldqd-v2w o4w m4 2p.zw52anythn of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directiol sglws h6 ),c+3k6ztpn 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 strairv6p unr j*0ruxr ;v,cl 5w6-hght wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an anrrp cw n6,0 5vruv;6rhlj*u x-gle 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 dw y+4xg/ ws/kstyk7) a magnetic field of 0.10 T. sgkyyd 7kwt4w)/x / +sWhat 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 magnetic5n( 7- 1)u3cadovk;s8w:j gqznfu jpa field of 0.20 T. What is the magnitude of the magnetic fonf -q p7)jno(k u8ag;3c :w1ajs5vudzrce 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 spev4uzw0 oy j1e(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 speed of. 8 nm:soukrp 58jls-)b0yxii $5.0 \times 10^7 \; m/s$ 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 wi.ohue0hgax6umz7 t7yz m9 4/rth 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 speo j;hf(eiau/ +ft,57*c/cfhpmzm4 u ped 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 wi1ba 3r+z2; mxbuk8jax th 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 speediv6:+obuta- x 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;k 82l0dl ;;vhsswgouhq r +z3 wire carries a current of 25 A. What is the magnitude of the magnetic field at a distanceh;vs l o k+qhd3w0g;l2s;z8ur of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, 1b2o-e pxst:c2d(u 2qz0 m awtbpeq2(x :cduos-2 2zay?

  How much current must floj r 8x4zzj)et,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 carryihy a . *e+o5wgk+qcff:ng a current of 5.0 A is the magnitude of the magnetic field due ecf:w+qf k . +ga*hyo5to 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 directions. The- w +/:yvl,sub kjbijt o5o)4qy 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 wire and 60 cm fro t 54q-wo,: o)+jvb/jksuilybm the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in ow zzxjz nvt*-ghx 3.oce9 c)1*pposite directions. The wires are separated by 0.20 m. What is the ten9 -ozv*gz zw1c3x.x* )cjhmagnetic field midway between the two wires?

  Two long parallel wiro+bu6 eixu a3h/6u.w ses carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what p/.+a3iuwh uosb6x eu6oint between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2,70z51m rl 5lugyn(jfe sbte1.0 A in the same direction. 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 of thys zn5ugetj5fe( r0 b,l1m17le wires experience due to the other wires?

  Two long parallel wires carry currents rw dx,oc4c:1wf 7p (xwof 5.0 A and 8.0 A in the opposite direction. The wires are s1o 4wpf:(c rc,ww7xdxeparated 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 cirukz d90 ou4:zecular loop of wire of radius 4.0 cm when a40u9u: zodze k current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wir5fv*/ bo izc zyo6z8thfe1 c3o y60x.ie. What magnetic field is produced at the center of the solenoid when a current of 10 A yz5yf3 .ox 6fhi06z*ob cec/ztv1 8 oiflows?

  A solenoid with 500 turns is 0.10 m long and carries a current dvq r- 2,;4y*bts evjvof 4.0 A. What strength of magnet2;vb ,*svtq dr eyvj-4ic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 c2jjbf:oo3 a a.p xqt1;m long to generate a 1.0-T mj bo3:x2ap1;a.fj oqtagnetic field at the center?

  How many turns should a 10-cm long solenoid have if -*:oh f1oxwk hit 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 rectan q:(:+yxnjd ,i spept 7b9xkg*gular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 dibk ,pnyq(xp::9etg*jx+ s7 cm x 8.0 cm?

  A circular loop of wire of radiuqupi6h p*p ;tevp /;h)s 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whap hi6 pp;phv*/e;t)uq t is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cr8,qczyz7(,v 5wz-f qyb7 6wirg6wicfoss-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 currenrb t e)ny4zy8k6 :qbf9t of 2.0 A is in a magnetic field of 3.5 T. The loop84bqz eb yktfny):9r6 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 of radius 0.50 m is in a uniform magnetic field of 0. )lu5f2wv* ma:i rnk8a30 T. The current in the loop is 2.0 A. What is the magnetic torque *k )28 malvrian:uf5wwhen 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 0kh6-a mxc jct:4ds;wn /,aw0 d.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is,k wd- /xd cah;:a6s4ntmwjc0 parallel to the magnetic field?

  A circular wire loop otn)d /v d+z9m9yzk g2jf 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-chz83 /l: -pe -oifb f y5xejvnc5sl9x/rarged 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 iony+4fc ngi:es7vg)y (a0 k4p hf with 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 mf-i3bsbm; -l kV and then moves into a magnetic fief-mmib ls-3 b;ld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is acceleratepy)m:n.liv*2zkd ;x3l+zwwj d from 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 ) +wzjm ;2dxlwvz: kp3ni ly*.follows.

  A beam of electrons is accelerated through a potential difference of 10 fkxh7 zb6 , i:o0jxrp4kV 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 particles are to b 6z ,pkbjxo x4:ifhr07e undeflected?