If the north poles of two bar magnets are brought close to each other, the mhmfjt0y6* a j*a8mvo2agnets wil a**0yotm8 2jmh vaf6jl

  If the south pole of one bar magnet is brought near the north pole of iqijp;9 4c zak-ocx8we.y.j 9a second bar magnet, the two magnets wi-9ai;wojcc..yx 8ie j4q zp k9ll

  If a bar magnet is divided into+j6:w;iznx jvvv m:xf -9 s2z4 ykmie+ two equal pieces,

  The Earth's geographic North Pole is magnetically an xg-vf7g 08p/vvfoq:

  The south pole of a pfyqa+o6 e kfsc/(*4c magnet points toward the Earth's

  An electric current q or2. :ngnd9:6dutp 8moi;ncproduces

  Which of the following is correc xie- f4dysm m1nor3b0vls d95165gyat?

  A vertical wire carries a curren/n *r6m,69dew+ lt 8sqlpfzant straight down. To the east of this wire, the magn9s,*n8+aztqd w lfrel6 mpn/6etic field points

  A horizontal wire carries a current straight toward you. From your poid42s csmibvv0a5w7 m- nt of view, the magnetic field cam2bv a-s ics0 54md7vwused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from a9hz njb 9toflosxo: -o/s4k16bove, the current moves arounook 6: xth1lnbjzof/9 -ss4o9d 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 circular loop of wire lies fm lsja 1d+xx3(lat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the dire1xd3xal+(js m ction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic +m/fl t8+mtt xfield is the

  1 T is equivalent toihai3x /t8y,d 7+ ptob

  The direction of the force on a current-carrying wirjurbd p- *qua1-zb+b.d4 n bn;e in a magnetic field is described by which of the foubq zjub--bnn.14bd*da r; + pllowing?

  The force on a current-carrying wire in a magnetic field is thz 3tdl**:rxg h6bh2 h,:oo /iskkgq q1e strongest when

  The force on a currentd-hduhxk:)kegab 5p4o 5ob4x 3e8 3zx -carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current strai0,51lvyu.bhqmw v4 .k3mivcgght up in a region where the magnetic field vector points due north. What is the direction of the resulting force on thmb.w5mqvl cug4.1k ,v3y 0vhiis current?

  A charged particle moves an6l67q7h a1xdasa qju3+4 ,qryrgf f(rd experiences no magnetic force. From this we can conclude trlrjsyau( q7 af7g4613qh,q 6+ar fdxhat

  A charged particle moves with a consta3 ,htna gu .y;w7ua2pdnt speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle wil; n.yg3a2t,7 h uudawpl be maximum when the particle moves

  A charged particle moves across a constant magn y *)mx) hwcu:)vhl6s.y bq/vq*cf9 svetic field. The magnetic force on this particles h*mq) :f cyv.9)/vwuc* v6xbh sq)ly

  A charged particle is injected into a uniform magnetic fqiy4hg4 tz8j 9ield such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wigq49j yz48 htill

  A charged particle is observed traveling in a cir yabq(,a )kzxmter 0rh2nr9o- (o1 a, k,pe*aucular path in a uniform magnetic field. If the parrk q am9toxr (ba(0 ,azp- a)r,you2k ,een*h1ticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magn(, cf-k-apu5 p)*u ybd1wcma aetic field. If instead the particle carried a charge of +2e, the radius * (u akf)pd,y-- pu1cacmwa5bof the circular path would have been

  At a particular instant, an electron movh0o4e*b jc e :doas0v9es eastward at speed V in a uniform magnetic field that is directed straight downward.jv *bo0so94 cedeah: 0 The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obse2vrsi:w+ pe)bf0/qei nyt,6vrved to curve upward as the result of a magnetic field. The direction of the magnetic fielw ii+2fbrv yq6n/0e) sp,vte:d is

  An electron moving along the +x axi9d7a( kdhycrxy+w, hx mkm qu()i6 0(as enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force 9xria7 6c(,auw 0(m)(+hkmqdhy xdyk on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produces vmu5kse6 (o.;lwi. pd by a long straight current-carrying wire is

  At double the distance from kpk(j.o3/z 2f l;shfy8i vi9vhp2kq-a long current-carrying wire, the strength of the magnetic field produced by that wirehif38.vly-;s9 f(i khjvop2/k qz kp2 decreases to

  Two long parallel wires placed side-by-side on a horizon3wew4) 8fr 7vo ghxl6ytal table carry 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 r8l63xgowwv)ey 7f4h view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires pl t1joe.8(pkr yaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at.1kotpr8 yj( e the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force be ij5 ;d6gajn6/yc, tfqbd(. dhtween the wires is F. T tq5 6. jdfih( 6/gn;djc,byadhe current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towarwrhn+66wz -zf rg-j;od the east alongside and just sou6z zr-+g fjwn6 ow-h;rth 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 the bottom 3bd)kv3xghq a )a5mb4 of the page. What is the direction ok )3h 345mxgb)aav dqbf the magnetic 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 placed side-2gf9bjyy(paq :5d7r kby-side on a horizontal table. If the wires carry current in the same di:radk5p jyygq(9 f7 b2rection,

  Two long parallel wires are placed sid9d7eoga+8kj fw *aq1p uev-h5 e-by-side on a horizontal table. If the wires carry current in opposite jdeqw7fa-+ 5kog vha91 *u 8pedirections,

  Consider two current-carrying circular loops. Both*3(x*m dw 6hrfae8uyx are made from one strand of wire and both carry the same current, ex f*ur 83*h(dwmyax6but one 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 mbvr36k;eulf 8 ph,2q q6kj lo)ade from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the mku f qvjhl26,86eq)lkr ;b op3agnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loopgrxm52fgc-byo2bp9 gy06h) f occurs when the angle between the loop's 9pm yb f6hogygg2)- r0 5c2xbfmagnetic moment and the magnetic field vector is

  When placed askew in a magnetic flj,q2m 2pvfr;;neo: rield, a current carrying loop that is free to rotate in any direction 2,lf ;jpq: mer;no2vrwill experience a torque until its magnetic moment vector

  What fundamental fact unk*kymccq9m))(ld+u w derlies the operation of essentially all electric motors?wluc*c +9m ))kqd (myk

  A circular wire loop lies in a i3 h0 ) sn/d-:brmfd 0aoq) p3lmmbr)zhorizontal plane on a table and carries 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 tq3 )lr3m:- /) sbz mi)d0aomnhdp0rf bhe torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleratedatp .d lvz fts/2 1y7hkbi4m+l/eh65s xtap4- 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 pe6p -24l4/+vt mta/x pa htesklz 1is5 .dh7ybfrpendicular 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 con:(fm*t(zpv lisists 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 wip* tlv ((:ifzmll 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 orient +zv iao-an*mg o-e8/ved parallel to a uniform magnetic fi omzaai- gnvv+-/ 8*eoeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directdy 03xzwds*f ,ion 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 5.0 A when vh*2k mqbr,4uit is placed in a magnetic field of 0.020 T? The wir4u,vkmr* h2q be makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.34, dhngphlp y01a7 er0 m long has a mass 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 thrlaeg4d 1pp3 h,0y 7hne weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Wef3nx,19ro0p0 h vgah hat is the magnitude of the magnetic force on the prot hg9v1o0p a0x,3nhrf eon?

  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 speedr6wbil-ksk*vs. h3 ux ,0j ub7 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 spefjg4rpj3 ,dx;ed 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 wit6phv a1hqq7 e t(j65ish 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 lh ylcsibid1:nl7xbd9ckl0, 2i3):v 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 magnetic force of the electron.

  An electron moves with a speed o k; crcb*em30nuo 9n73dp*b sof $8.0 \times 10^6 \; m/s$ 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 s4 v- ico/avmp si x)h5ef,y:5yv8c8 wof $3.0 \times 10^6 \; m/s$ 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 wirey 79p.pvf1q go carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wirpvfoyg.7qp 91e?

  A high power line carrying 1000 A generates w3 5y 5mtnxd2wmhat magnetic field at the ground, 10 m ay5x dwmm32tn5 way?

  How much current must fla be6tjbhid,8;jw su p)b831low 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 current of 5gd3y my k4k 0.6cnke4k utb5r:.0 A is the magnitude of the magnetic fiertyyc54dm:k 3 e.kgkk0 un6b4ld due to 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. They swvg(i6;tanwl m 5ez6x3e87 h.m2nr uare 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 anrg86 ith73 e2lx .mae ;w5 u6v(nnwsmzd 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directioni2 10y*b zlqzus. The i *l1bzzy2u0q wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires capt e5d+jhv )u2rry currents of 20 A and 5.0 A in opposite directions. The wieut+hvd5 2 )jpres are separated 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 di; vmjchuwyla(u kxk :cv6+;90- i abs,rection. 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 magvcchxu6kvsa:+uw9;- kyi (jb, 0m;alnetic 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 Agh.ek8oqm219lufm 8c7v*b j g in the opposite direction. The wires are separated b 2l8o* 8j7mu1bgvhge 9k qfmc.y 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 radius 4x(i .(kwv lj+e.0 cm when a current ovw (e.k+( jxilf 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field is cpwh ocz0l9omsj-2 r:f4e5.kproduced at the center of the s.fj5:9om2w0lcc-ekps z r oh 4olenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a o)n9x o idl*fcdl5-+j current of 4.0 A. What strength of magnetic field will it have at its center?liojdo*n )l fdx5+c9-

  How much current must pass through a 400 turn coil 4.0 cm long to generv 2y5pn )f-(*ybz lwyvate a 1.0-T magnetic fiell bwpy n)y-z5vvy(2*fd at the center?

  How many turns should a 10-cm long solenoid have if it is to g9u1r8b( zxqpuy,c jra84p*zi enerate 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 120 turns that carries 6. w 6c6lmfn/2fx0 A if its dimensions are 4.0 cm xf6/6fm cnwxl2 8.0 cm?

  A circular loop of wire ofwwlu0qb:g ;,7up l1 wm radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop mg,qw b:wlu7p10lw u; is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire 7/f v2 );5q smgtmywjuof 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 magnew 6mraa*9c(lb hj*f 6qtic field of 3.5 T. The loop has an a6*h* cafbwr qa9(mj 6lrea 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 fie 2+h lm+7io wcvublyyg93w:b0 ld of 0.30 T. The current in the loop is 2.0 A. What is the mag bywowyi lb v7:2cg+ 09lmuh3+netic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radid74ch 2ku;x r oi;b*vius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the lookudhr ;x ;i4c 2i*bv7op is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of areanlq /gqu)3 z9i $0.25 \; m^{2}$ 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 8 ac(*dullbnwqea:4 +) 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 velocity+p(nfpcljh:95 ywuc6kskt()+4u wic $6.9 \times 10^6 \; m/s$ 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 a magneti)f*j i7z 9qtb+ ifsr;yxon+;h c field of 0.040 T. What is the radius of the proton's rest;obf q* h9 r7+fzis+xij;n)yulting orbit?

  A proton is accelerated from re b5.intk b98ugd,lrthw6 o2,zst through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radiu,rtdoz5uk6,til bn2g 9b8 h.ws of the path it follows.

  A beam of electrons is accelerated through a i7vwoin1shvc)n(:sk 7lh0 0 c/ +znaapotential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selecsoc1nh0 0l:)ns7 +i7k w(nc va /azihvtor has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?