If the north poles of two bar magnets are brought close to each w pag6rcld0-4zgzm m336 :pcrc7z2flother, the magnets fg za-mc3rpp:32lzz7w0g4 c 6dc rm 6lwill

  If the south pole of one bar magnet is brought near the north pole of a secodstsq6 o1/l2rnd bar magnet, the two ma/so61rtq lsd2 gnets will

  If a bar magnet is divided into two equ 8xbda6wxow+hj d pvz7-fbu c4+oho0: t;q61 fal pieces,

  The Earth's geograph0n5w1-6,j8lhr 6gj ifdi db hgic North Pole is magnetically a

  The south pole of a magnet points ti490u+i5a ef n.oqlb7domu c)oward the Earth's

  An electric current p n8 rbrgjt+0r/5l4ahv wo*eg7 roduces

  Which of the following is correctb 8c5vk xb5r;mmp;h0h?

  A vertical wire carries a current straight downh)bmqmg m9(e:. To the east of this wire, the magnm9mq()be: mgh etic field points

  A horizontal wire carries a current straight toward yo2 ;rb9 xbnl d8blazb1 z;fb84iu. From your point of view, the magnetic fiebi8b2xb4 dll8n a;bz91b; frz ld caused by this current

  A current carrying loop of wire lies flat on a tableb zltd7;k9us xike 1 jjlx03)8 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 look ; d9k b0j1ltlxziej7u8s3)xp? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. 6hh4jw ;xklq:om 24c :;bovdcm:rah2When 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? The magnet:mwc:4xokolq:6cjv4hra2 h2hm;b ;d ic field

  The SI unit of magnetic field is hon/;cbdf0i)c:frs, tmn q) 8 the

  1 T is equivalent to.2i5oki + y6wg )gyouc

  The direction of the force on a current-carrying wire in a magdu f s q.k0j8l.8(y r-q3irllm.*p rfsnetic field is described by which ofyr k.lu.rqqss-8jid*p0.mf8fll r 3 ( the following?

  The force on a current-carrying wire in a magnetic field is taakx(x xvm)+;0a6 qc qhe strongest when

  The force on a current-carrying; b6jzzrg66qe5 - - .:z h5ucwzkovvnx wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region w5cw -obi7 k-x x).bztahere the magnetic field vector points due north. What is the direction of the resulting force ona)w.ixbx7b5 o - ctz-k this current?

  A charged particle moves and expmzg8, e uiw0kw e ))xhop+yu /2jq.vd2eriences no magnetic force. From this we can concludeoj ghkwuyiepvu)2m2 dzwx /+ .q)08,e that

  A charged particle moves with a constant speek /.n(9rjhwph 4r1xeyd through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle wijypkrw419 nr.h eh (/xll be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forcw*t eb:.rr)yk x;9bhp e on this parti;by kw.:e9 hxr)rbt*pcle

  A charged particle is injected into a uniform magnetic fg*pf :h, 6r5h:g-u-j hl wmvluield such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the l5-hrl:mhu6h *-p:f gujv ,wg particle's weight, the particle will

  A charged particle is observed traveling p()4ua kmx jnewtt;uv6 :j37 pin a circular path in a uniform magnetic fanj6p7k (vxu tj3e4 ;mp):wu tield. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of 8- l9vfeudo.:ghut f6+e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the r uv.oh6u-feg9lftd 8:adius of the circular path would have been

  At a particular instant, an el,) ez x30(7cabofl ym7c(ksfaectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that a k)c70 f3abl7((moyc a xfs,zects on it is

  An electron has an initial velocity to the south but is obserx*fz+om2jc7w:anv 4 u ved to curve upward as thacju4v:7mw*+fzn ox 2e result of a magnetic field. The direction of the magnetic field is

  An electron moving alongh89qxdb+7so/reta3gk x)0sy 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 right, +y up, and73 y/g+qkohdsxab9er0)t8s x +z out of the page.)

  The magnetic field produced by s9azf 9 3x* bvv7(hnp2 g+ svhfht.mn,a long straight current-carrying wire is

  At double the distance from a long current-carryingr4rbe56 fwha o l. pqz-x;a*n. wire, the strength of the magnetic field produced by that wire4n lr6; ab-h*5qwozrxea..pf decreases to

  Two long parallel wires placed side-by-side on a horizontal tablmj:; fzxi* f-de carry identical size currents in opposite direct xj-f*;m:ifz dions. 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 field at the point exactly midway between the two wires

  Two long parallel wires placed sidexd8kr(e0r 2 eq-by-side on a horizontal table carry identical current straight toward you.(28qe e rr0dxk From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal curre -vy,pjp 4n4i-qx/wwgnts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitud4jwq, -gippw x /-n4yve of the new force between the two wires?

  A long straight wire carries current toward the ea:uutpgzcr7m) ,;/31 jvi ysrmst. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on tmc 1) m :s gz7;rrt,ypiu3/uvjhe proton?

  A wire lying in the plane of the page carries a current kx4lc9uqco ) rfa /d59toward the 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 tcadqkc5 lo4/9 fxu9r )he plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal tj,l 852 jkv1+ksvzngt able. If the wires carry curgz18tjnj s, vv5+l2k krent in the same direction,

  Two long parallel wires are placed side-by-side on :l:a2 twdzi6u *3ntx zv5hi8m a horizontal table. If the wires carry current in opposite direw6l iu:zia m*nt dxzt28hv 35:ctions,

  Consider two current-carrying circular loops.q kof0v da3mnqz0447 l7aw;uj Both are made from one strand of wire and both carry the same current, but one has oa4u7qj0; l 40qzm f3va 7kwdntwice 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 (glu p4 z,,;jmlyef, yare made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magneticj,4ye(f;l mgp,lz u y, moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the am p ) zqve+)6l3eyiye,ngle between the lq6vzeey ly+3e))p, mi oop's magnetic moment and the magnetic field vector is

  When placed askew in a m-nj-j ahg fz2g4ognq ,3d va,3agnetic field, a current carrying loop that is free to rotate in any direcaa, gjozq 34 j2fnhvgng-3d-,tion will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of ess- sbm-5fg 7r)er8buppgzl7 i ):vyj( yentially all electric motorsups br5zjvl)8yf:-ym7 (grig) e - 7bp?

  A circular wire loop lies in a horizontal plane on a table and carries cfrm5x1q/o c9wn2s rk)urrent in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and di) 2o sk1r cn9f/mwxr5qps 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 spectrometh e .qks/lj- n7js5lp2er a particle 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 and oriented perpendicular to the velocity of the particle. Derive an exp -sl.2s/ j5npklehj7qression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through croshy :92lj hyuwy++0ykfsed electric and magnetic fields. The forces exerted by these fields areu: y+yy0l+ 2w9hf yhjk 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 0.60 A is org ;+g0okyh8 z1w fdcf7tx,v 3giented parallel to a uniform magnetic f +1x,o;v h gc3gfgdfw07ykt8zield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current o03ga8whn uy 0 oa.p -,,vncpqcf 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 straightsvrty 9bv1i e ;z 3;pzrqlc-41 wire carrying 5.0 A when it is placed in a magnetic field of 01 it9 -vzqvy4z ec;p3rrs;1lb.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 kg and is in a magnetic field.wh)hwc bj1rfarn9x9l)o / v 7ctzc;1 of 0.10 T. What minimum current in the rod is needed in orde;b9c9t rcf7 orla1 c))wvh/.xzhnj w1r for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What i nt kn-m)bdor3tp 5uew2,a-8 ns the magnitude of the magnet2w)n,p 5abnnrm-t ko8u3- tdeic 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 speed of 0knjn,3dmf,nd jja+,$5.0 \times 10^4 \; m/s$ 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 )*/+i xq *mbpzd +qonrll e*b2a 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 witq .od roet*3eq hxx*e*,3wem5 h 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 speed ,(2xqhsrx8 4+p.l4f bi(c0yrplbvgl)l(qjl 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 withk z+vo g4x0qw. 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 okh j -rrm(s6qgut j20cnich 34h.-2xgf $3.0 \times 10^6 \; m/s$ 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/cs, f :fo dabay og-jy,,.3yf A. What is the magnitude of the ma-fgb,aoy 3 :,f ,jdy. ocf/ysagnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fieffs; byy585i7ub5ju b lo(dr 0ld at the ground, 10 m a07b b j dy58urify( 55fl;sbouway?

  How much current must flo n6 a;-huzaw25vzda5 ow 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 currenu 92n nh8 umag9f9gsx4t of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetx f9sg49mn u9h82a ungic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They a h8s pp6a:o5h,f2 xpy 248u diqbvmuw,re separated by 40 cmhqw yphavd8p2u:bfs2,5 8p6,x o4 uim. 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 carv.qi 4u9mlx4z f cvump1(f4,; onjm r3ry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What 4qvu (4czv.jf m9m4p,u;fo3nlri x1m is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions..fk/cm//ewlwxay1u4: 6+ ib ygzbb ;e The wires are separated by 0.20 m. At what point between the two wires are the contributions from the twk .mefw4+bcb /ig ywzy1 ;axub/ 6/le:o wires the same?

  Four long parallel wires each carry 2.0 A r9 jstm35d6 ehfkyzw,( v .8gsin 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 the wires experience due to the other wg38e vy(wd fht.j 9rz,6s5skmires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the oppositegmdb.e( 6 un-e direction. The wires are s6 gmb neeu(-.deparated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fieu/gclxtkr q5bt, 8:d-ld at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0qb8cku xgdl- t:t5,r/ A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetih ol73876u g ;wmwysbfc field is produced at the centl;ow 7yfg b3 8hs6wmu7er of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of ir 6wz n56.uw kzt*fqye(.z /v4.0 A. What strength of magnetic field will it have at its vwzwnf ztqu*/i r.e6zy5k.6( center?

  How much current must pass through a 400 turn caifckw( d3i*5i /;mtg oil 4.0 cm long to generate a 1.0-T magneti*;5dgi m/k( 3c iwfatic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate a4 hfxb9/exrbu e 95l8pa k9fd9 $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of1r2.dunj fv3s a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x d13 rvns. f2uj8.0 cm?

  A circular loop of wire of radius 0.50 m is injhn s-r mqa5,1 a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the 5,s jmq n1a-hrplane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-seclw hb)f:4o r+ltional 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 magnetic field of 3.5 Tk r ev(hxyfx5boeku*6j 400+bv()w i h. The loop ev+ ui(oebkk vhh (* w65xb4rxfjy0) 0has 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 0.3:r+wtiu(lpu 60 T. The current in the loop is 2.0 A. What is the magnetic torque ruil (6+: wuptwhen 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 ( hktjhayw)j5) 24vrs0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to)s)r vj wh5(y ja4tkh2 the magnetic field?

  A circular wire loop of dor45t zfqk(g4 zm:7s 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 e) has a spf r:k hxad+,bg0(dro 2eed 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 wiww*c1fwcuv. 8 th 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 pot(6ke v2vqr9f ,d *xbhlential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the bxr*l h e,q(6vvf9k2dradius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magne szj. 1gv5m,.i i;cn4b.7eqe mc)ystktic field of 0.30 T oriented perpendicular to its directioikyc;tnjgs . bv e 14zi).m7 qsc5.,men of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differenljr jgy,:3caa x* 0b4ace of 10 kV 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 required4br0x,caaa * y3jg:j l if the particles are to be undeflected?