If the north poles of two bar magnets are brought close to each other, the man3);oqjfx y(xkb* jw-gnets willx*xjkonq)j3 (b; -ywf

  If the south pole of one bar magnet is brought ne 9 tw tb/1 jbc2f:xiu9ww4yw:dar the north pole of a second baw jcbi/f t b9wy9:xtw1:u2w4dr magnet, the two magnets will

  If a bar magnet is divided into two b/h+wx 4,lr woequal pieces,

  The Earth's geographic North Pole is skakg7/ rjmv-:ne3c 3 magnetically a

  The south pole of a magnet p dl535/ kvmwp q*h.u7 )tumgzhoints toward the Earth's

  An electric current producesm.i/6cz+ppxmi/gw2.:x y pm v

  Which of the following is corwqesn* 12q1y trect?

  A vertical wire carriescp p+yaq/97xi) ue* vt a current straight down. To the east of this wire, the magnetic field po civpx uayq/9 7+)p*etints

  A horizontal wire carries a cgpb r77e -tqt(urrent straight toward you. From your point of view, qt7-7 tbg(eprthe magnetic field caused by this current

  A current carrying loop of wirb,zj osk+10 6.sg tcg/iz.ki.h2 n zyye lies flat on a table top. When viewed from above, the current moves around the loop in a countercloc 1hb.60zn,+g/.k.gjz otzyc si ik ys2kwise 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 table top. Whe/mi857 tqyjii sfbho8 (e-q(qfi5-z an viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnet y8bf(sj f h7qioa(58zm- eiqi-t5/q iic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiel e s 9quces0s4mpry(0ylo7r 33d is the

  1 T is equivalent to9ai dvfri 5 y*p*;ymj*

  The direction of the force on wy d jp2 6u+zlzq)bv-/a current-carrying wire in a magnetic field is descri6z)jbv l-yz/p+uw2d qbed by which of the following?

  The force on a current-carrying wire in a magnet5/, czrij3 ps- wzem,pic field is the strongest when

  The force on a current-carrying wire in a magnetic field : 9p9gezf;fwhrz u2,js)ahf7is equal to zero when

  A vertical wire carries a current straight up in a reo38/j ot e1caigion where the magnetic field vector points due north. What is the direction of the resulting force on this cucjeot3 /18 oiarrent?

  A charged particle moves and experiences no magneticbwt9 i-.ga +.7qkgcn0s fc- ag force. From this we can conclude ia-7acgftcswqgb+.n- 0 9. gkthat

  A charged particle moves with a constant speed through a region wn6p 0)*pn 6 *owtaegn;i sjl:ahere a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum whentp6elpa* *j) wgn;snio: 60an the particle moves

  A charged particle moves across a constanla;5rg0 ke4zez-; h tyt magnetic field. The magnetic force on th;0;h aygl -4tzkr5ee zis particle

  A charged particle is injected into a uniform magnetic field such thatbe /b,6i3w+6g6f,; jim jp lky y-opll its velocity vector is ipo, +fpj b3lykylb66 6mg w/;e,lji- perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trav8(dqv0kc 5ekweling in a circular path in a uniform magnetic8ke5wcdq0k v( field. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge o:nwjv1 c5e1cm nk7 ry n3zj50wf +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have beenrey53m1 v 1:7 zn5nw0 jjnckcw

  At a particular instant, an electron moves eastjs,p om5y9 l+m/pytt;ward at speed V in a uniform magnetic field that is directed straight downward. The magnetic forcep 9yjs5+,t/ lmompty; that acts on it is

  An electron has an initial velocity to the south but is observed to curvets+cp fbm. xekt*j0 ;8 upward as the resul 8tbj0t xkcs+* m.;fpet of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regi hhlj31:+) l se+lsrdpon 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,+eh3 p 1llldh)rjs+ s: +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-cvwo-n1me5nn .,v,r* - hpcfys arrying wire is

  At double the distance fromodywzc, 0 l (kaikvmd:(gm*7 u;s85rs a long current-carrying wire, the strength of the magnetic field produced by that wire decr0u, ( gso7v(i m:mw 8* lsc5d;kkdazryeases to

  Two long parallel wires placed side-by-side on a horizontal table carzlgv.qqh -*8t ry 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 your point of view, the magnetic field at tq*.zth- lv 8gqhe point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry idjhp(h hz-(pk/ entical-/( pzj(hhpkh 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 currents lqd;grn+ei9,. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is g;9l+qni ,redthe magnitude of the new force between the two wires?

  A long straight wire carries current toward th59cmsl). ny.rd mdyg. e east. A proton moves toward the east alongside and just south of the wire. What is the direction of the y.5 .9s d.c)mmlryg ndforce on the proton?

  A wire lying in the plane of the page carrie0x+4dm r1i:5h nxcna es a current toward the bottom of the page. What is the direction of the magnetic force it ea4n0 cmdx1rhi+x 5n :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 place3k /pfe/bsckdb n8m46d side-by-side on a horizontal table. If the wires cap mc 4k 6/be/3ksn8fdbrry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If+li9xq* dl ru-x,qi, e the wires carry current in opposite d ,ilq*ixrl+- 9u,xeq directions,

  Consider two current-carrying circular loops. Both are made from one strand evxxy yfsw2wd7 5dgo:,dlc;ot .2, m0of 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 f w eyxt gds 02:m2ydw;5v.,fxol,o7c dield at the center of the larger loop is

  Consider two current-camu z5utijtf 80c4(p5irrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the ot( 85tfmj45 t0uupzc iiher. 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 . ud sb jowb:i:vyb*7* ek2g(e/bb6jl the loop's magnetic moment and the magnetic :/b6(yo sbebjluve gd *.2*jwkbi7:b field vector is

  When placed askew in a magnetic field, a current carrying ijj o4:5gtw:mdjbnq 8n a)b.2loop that is free to rotate in any direction will experience a torque until its magj8tn:2oqab 5j jb):.d 4iw nmgnetic moment vector

  What fundamental fact unpj; q)+rg(*zwl bh9i oderlies the operation of essentially all electric motorsi*hlo)+( pzj9bgwqr ; ?

  A circular wire loop lies in a horizontal plane on a table and caruzng 5mqg:v4f+fn5)o ries current in a counterclockwise 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 currentsum54nv5ofn +zq f :)gg interaction with the magnetic field?

  In a mass spectrometer a particle of ma2n8j .j wj-onass 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 expression for the mass of the particle in ternj-anw.oj 8 j2ms of B, q, V, and R.

  A velocity selector connd,4asp.w30ns0.qje q.l. jwr:t v wnsists 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 certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward0rw4s:qnsqd.3 etnwvp w.j. ,ja0n l. 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 oriented parallels30via r6xo67fwx: nc to a uniform magnetic ca:i7xwxsf6 v03nr o 6field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a 8 b85um,zny1+lb8 s-hi1 djxop fu1l hdirection 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 carrying cq 3ex pcaafp;,e 0k3,5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angpe kceac0q3,fap;x 3 ,le of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.0e6erchac jct(5s 56;p(0uhhz 50 kg and is in a magnetic field of 0.1 (h6 6ehrc (z;tpuae0s5c5hc j0 T. What 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 magnetic field of 0.20 T. What is the b5f5a) 0v)gk8p k) je*kgsft1if* n qfmagnitude of the magnetic force on the pro)jgk* 5pf1ik )0 ef8tsqfa b v)*fnkg5ton?

  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 hxfgp ic )8.i8a speed 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 q(/zmm4h)jjdkjm e2+d 3b0ya $5.0 \times 10^7 \; m/s$ 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 travelinc ls0rvv45do;*2cw oxg due 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 am 3a1 g7rdwso5eq.7v - mmh4d6t3jow m 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 magnetic force of the electron.

  An electron moves wi, nlk ivk3-knp )ia+7j:px:d ii.u on*k -;lsxth 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 of t6xmte1bpw ya m e2uf83w1+n )$3.0 \times 10^6 \; m/s$ 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. W)z)/ ntw;nzg oqzxv)7hat is the magnitude of the magnetic field at a distance of 0.15 m from the vz)nzog/xzt;)w7n q) wire?

  A high power line carrying 1000 A generates what magne3544q+ jgyot zv.v h6n4zi ykttic field at the ground, 1ziy. + v4gk46 oqzht3tn 5yj4v0 m away?

  How much current must flow foy/7at * yvmh2dr $1.0 \times 10^{-3} \; T$ 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 A oafd5;n+ jf6+fi9 o )gb4) wuodcvjc .is the magnitude of the magnetic field due to the wire equal to the strength ofo)o 56;dji f+bv f w)d9u.g4oacnj+fc 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. They a fd5jbv 4qa42cre 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 60q5ja4c4 v bd2f cm from the other?

  Two long parallel wires carry currents of 20 8 9s*xo6ba rmtgj:iv c0dr:b: A and 5.0 A in opposite directions. The wxb 6abt::o jd0 s*gm:v89icr rires 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 anwmgdy8,*y6f a9zc m4sd 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires9 m*,daf46 cyyzg8 wms are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dire3(kl ,fy9gy 6vdpmi*2ldj)ey ction. 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 mkfydmp),y e69yl(ilg*d jv32agnetic 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 opposite zu2xbia- 9pbf+qwa- 2direction. The wires az-2 x2- qbw9+fpui baare 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 circular loop of wire of h8gs)v s p/uv+4kqs/ oradius 4.p/+v8o4/us hvg)qs sk 0 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turnsay5.j(bc el +g of wire. What magnetic field is producelgye.(b5 +caj d at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrie dbk:beq 3jqfa0 j 6:kzte*;)gs a current of 4.0 A. What strength of magnetic field tkj6q)kj g;0qez3*a bbfd:: ewill it have at its center?

  How much current must pass through a 400 turn coxyi+ pru. +hgw x928fd3v a5qkil 4.0 cm long to generate a 1.0-T magnetic field at the cehqk gf+p.38iyxruvw5xda9 +2nter?

  How many turns should a 10-cm long solenoid have ifvx+wn j1m s .up+ob(9afr0pa 2i n 9g7bo4)kcg 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 rectang5-tf ssll,lt )ular loop of 120 turns that carries 6.0 A if its dimensions af-)l5ls,l t tsre 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform svsp3 pmb5yng 65;s1amagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plpb6y g;s5 v3 1ns5pmasane of the loop is perpendicular to the magnetic field?

  A circular loop of wi(umfx sy7i1*6 xg e,nweo+ ez2re of 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 2.0 A is in a magnetic field oqy7z9h l0; 9rs-(wxc duc2wg qm9d7jef 3.5 T. The loop has an area ox qd-hwucr 7 g(09dw7y2;qe9 jl 9cmzsf $0.12 \; m^{2}$ 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 uniformh6tm(c*vuruwr*4 , fg magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the m(4w u ut *vrcm6f*,hgragnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unif3; 8jc8xj.yrgp ux w;eorm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is thr3y8jucg j8. xp;w; exe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area sufok,3omt 8i7ss32et;k)-r6 e ht ahtz7ja( $0.25 \; m^{2}$ 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 m6m* vu v04h2ivydwp5(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 withn,z,ckl5cv / zq8: dch 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 k9;3ddx l egfe0 ,bzl t8ltyf7e 0tqc**V and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting b e3;d8t,0 gt7yf*qcl flte0*elz 9dxorbit?

  A proton is accelerated from hbaw8l8s gn0qkn -+ 0hrest 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 folbgsa+8h lhnwnkq00- 8 lows.

  A beam of electrons is accelerated through a potential difference of 10 kV bef;4rib8/a;va5:ro qb xtwu el+ore entering a velocity selector. Ib;4 tar5r8li ;obq xve/w+ u:af 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 be undeflected?