If the north poles of two bar magnets are brouf5qnu)b3ms0 fght close to each other, the magnetqf bfm us0n35)s will

  If the south pole of one bar magnet is brought near the 9 xz o5igd:fqby6dhn90gq4+pnorth pole of a second bar magnet, the two mxdgd+qzb5yh: 9 qpo6 i4g0nf9agnets will

  If a bar magnet is divided into two equa:ibotkp n s9q;:q97(sj or5 ( js6zzx ik-aag4l pieces,

  The Earth's geographic North Pole chvnna +y+j)*8e/ryu is magnetically a

  The south pole of a magnet pvaq(tv0ajl+lm pc + ,803oq qcoints toward the Earth's

  An electric current producrrpv g1+pd 5 fwe-yi9-es

  Which of the following is corrsgg0ee* p5x ag4.aks 6ect?

  A vertical wire carries a ckw 9st0qray,vp1 a(h64 y/n jyurrent straight down. To the east of this wire, the magne,wq0 ara41ystj n 9v(yk/p yh6tic field points

  A horizontal wire carybsv )y ,7bpk3i h589sl ib9cnries a current straight toward you. From your point of vie7s bbc,s8h3 9y)ib y95pn vlikw, the magnetic field caused by this current

  A current carrying loop oc3fhy)w 7cj+af 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, ou+cchf3y)wj 7a tside the loop? The magnetic field

  A current carrying circular loop ofg2*hnv,2gn 1 ek 0ytfl 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? The magnetic fieldytk1 2*2g,0fvlenngh

  The SI unit of magneticvn3a(r vf.lz 8 field is the

  1 T is equivalent to( .bzi / lqxhnrka, (-tkb.b4g

  The direction of the force on a current-carrying wi ejck;q6n4 7uzre in a magnetic field is described by which of tk;qz 67ec4nujhe following?

  The force on a current-carrying wire in a htw4b j 9 b*lw63ys7+4c ncplwmagnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equ */jn u;f:iniwal to zero when

  A vertical wire carries a current straight ui azkm )(e2q o1;g /x/llp vnzk.l9nfga3w);mp in a region where the magnetic field vector points due north. k/(in2m. go)n /kgam)qzwzefvx ; 1pll9a3l ; What is the direction of the resulting force on this current?

  A charged particle moves and experiences no ma l7s+f:wa hac0gnetic force. From this we can conclud a7l:0c +wfsahe that

  A charged particle moves with a constant omt) u. enb1d(so 7jg8speed through a region where a uniform magnetic fiel1 o8bnmoe jg) .(sut7dd is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves acrossg+/imqe wgka d(m,xu3 k 9h6tgt(9j4z a constant magnetic field. The magnetic force on thitd9 q +xgt( , 3 w/ghik96eka(u4zmgjms particle

  A charged particle is injected into a uniform magne6; 4sv5-xfgwym lwe/q tic field such that its velocit5e;4 q6/wflvsm ywx -gy vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed trav3b97(8w b(j7lz pkw1dppch zaeling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wopbjz7 1w(7 h(b9pzkclp da3w8uld be

  A particle carrying a charge of +e travels in a circular path in a uniformmskuy )v;-+wc magnetic field. If instead the particle carried a charge osyw;k uv-)+mc f +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward a+uydhw 74. qa9k:wdv nt speed V in a uniform magnetic field that is directed straight downward. The m.h:adu7 4dvkww yn9+q agnetic force that acts on it is

  An electron has an initial velocity to the south buoy rc 3n*h5b3vt is observed to curve upward as the result of a magnetic field. The direction of the magro*bvc ny33 5hnetic field is

  An electron moving along the +x axi8tfdopv04; sis enters a region where there is a uniform magnetic field in t0 ;oi8sfp4vt dhe +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 produce 95 icgtd0yio8i(uz *fd by a long straight current-carrying wire is

  At double the distance from a long current-carrying wi 7m(+b+1 xw9s2qywgd(nmc xbl re, the strength of the magnetic field produced by that wire decreas(wqw g1b(d+n yms+9mx2l cb7x es to

  Two long parallel wires placed side-by-side on a h)l/ s f6:mknvu. p4yj-lx y7rborizontal table carry identical size currents in xb 4)krp6yj yu: n7f.lm-vls/ 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 the point exactly midway between the two wires

  Two long parallel wires plaqk* o z n8tytapv/j i bl)0-)3;)dzniaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wire -;zkvad zli8j*yn )o tqtnp ab0)i3)/s

  Two long parallel wires carry equal currents. The magnitude of the force betwe/ojr-iyi) r db pz5c4 rs7dh17en the wires is F. The current in each wire is now doubled. What is the magnitude of the new force d p7s51-r/)b4rc hy 7d rizjoibetween the two wires?

  A long straight wire c- ): n ayp5/d/v2)dlgiz zzcvqo5wyx3arries current toward the east. A proton moves toward the east alongside and zx3):z2)d v5gw5y o /d-vna p czyl/qijust 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 d2pe+j i*cqd1zze l tn--k3w(current toward 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 the plane of 1kw(d 2*zc+pz3ieej nq d-lt-the page, from your right?

  Two long parallel wires are placed side-by-2vf ka*9 dhu 80keocjzy947n hside on a horizontal table. If the wires ca9zhn0 v782fkhjuoke *c4d ya9rry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tableklj uh+acd1t-6 ) xdpkl,9kd 7. If the wires carry cur 9j-dk)ld ak x,7kdc1ltup6h+rent in opposite directions,

  Consider two current-carrying ceevq; +iy;d(rt4k; 1qmkq,c iircular loops. Both are made from one strand of wire and both carry the same current, bui1d cie;q;vk +,emr(y4k; tq qt 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.( ytdo- ykxh78h*e8zr Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magne7z ye*y(k8t h xhd8-ortic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when5/(i ybqh z:c kx55: rfafll5w0vad -d the angle between the loopir:yza55hk 0l fcl5( dv-:/qfbxd5aw's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying ,f-fcx(7 grrlw6d0i :frcx)ploop that is free to rotate in any direction will experiencewr:7(-c,x 6d0fg r) ifflxcrp a torque until its magnetic moment vector

  What fundamental fact underlies the operation of ejh+ac b ,brpbczm k52n41s:2yssentially all electric motors?a m:csn1by2b5h24k jbc,rp+ z

  A circular wire loop lies in a horik8 hhq9jmaa8*b;dha 3 zontal 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 a3d* ;m8jbh8k9qha haside 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 m and charge q is accelerated thrnysr-/6pfa9y km( c3cough 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 pary f(skcp 6-am9 3y/rcnticle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passingu cv1q7us3;4rdu xa/g 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. a3duxc;/g uv14 r7sq uIn 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 0.6seg/9dl s6. ku1eq yb*0 A is oriented parallel to a uniform magnetic /e9lk1u*dg. ybs qse6field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of z3v7/dw-nx ih 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 ondgvbs 0d5. b 2dxni47x a straight wire carrying 5.0 A when it is placed in a magnetic fiel dxd2gnb 5i4v0s.bd x7d 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 mass of 0.050 kg and is in a0x1 hx y,lnar.m-xk 7j magnetic field of 0.10 T. What minimum current in the rod is needed in -k1jm0, rxxan.h y7lx 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 ez,gkxfy*531 , dzv)lijc 7db1mfz: wthe magnitude of the magn,jfyg li *m)e1cz1 bx37 vzwd k,zfd:5etic 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:1pw/dwnofq)57i55w bcd xxq a 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 y1d3ll a+nakzgw9f8, a 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 89a wy(a ;rwafhwb;pi/bb/ m1due 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 with2 awylwdgeuy5.jk7ry ;f f:uj) z//a, 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 speedv)mflg :)75 ch5pw ,xjdsjy/o 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 ofo:3/u c7 yh/hudst y)/xzrx ;w $3.0 \times 10^6 \; m/s$ 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. What is the magnitude yrbs8*su) 8 foof the )rf8 o8usys*bmagnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generat k3twjb9cw u0*es what magnetic field at the ground, 1 twuj b0*c9k3w0 m away?

  How much current mus(y jo2 xa)kl;ut 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 cym8 ew8 /bn8av0/ ltoacizd73 arrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field c//y 788a0z3vw btaed8inl om of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curreng v.(4xmvd:ys6q x. gkts of 10 A in opposite directions. They are separated by 40 cm. Wh: kxvxy4. d.q ggmvs(6at 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 carry currents of 20 A and /s1,o lr;qd;mldwt0 p 5.0 A in opposite directions. w0od ;ptl1, smr dq/l;The wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currene b*adko 1cs*3k6e 719q8ie ,ixczc gnts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from theknaq3e*x79goik, sid cc1e b 8ec* z61 two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. The q jw2lgl0lx28 3ik0f0xj.hiw y 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 to02080hlflj3kgwiq2x lx i.jw the other wires?

  Two long parallel wires carry currents of wcr)69n lez (x5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m) 9le(w6rzcx n. 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 radi3 r ,jju1*:nm ;tpvphpus 4.0 cm when a current oh,v n*;t13j mp pjrpu:f 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 50009zo- sezc8aki6jn0k( turns of wire. What magnetic field is produced at the center of the solenoid when a curren-(9s8c ek0na ozjkiz 6t of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What kkw4 plx ic30yo0r:/estrength of magnetic field will it have at its center40 :/eokkw 3piycxl0r ?

  How much current must pass through a 400 turn co2inn1.ut ros 9il 4.0 cm long to generate a 1.0-T2tr n nis1uo9. magnetic field at the center?

  How many turns should a 10-cm sjv 1f 08k:eoepi35xf2j5kl(wymvu) long solenoid have if 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 rectamg/ew ae)lk3fq4 0 iiipk5by.(c: )fangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 c( imaci4q50 y)e. p3:gielwf kabk/) fm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 4gz, vif3zd(t T. The current in the loop is 2.0 A. What is the magnetic torque ztg(v zfi4 d3,when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crosqy z:qm),z s9y/sif0ps-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 +0cc fj6),g nvdvz3;m n)sauvt e/k*qa magnetic field of 3.5 T. The loop has an aq;n) c ze0mt)6d jvvs,*a knvc/+u3f grea 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 qz 6z8nfp1 :3-wrxm/mo mc*n ubf;3fein a uniform magnetic field of 0.30 T. The currenz:n*mfecm1x3qnwu 6mf/ 8zr-b3f po;t in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wirur6 1i,a wq4;x4p.djrrqhqb)e of radius 0.50 m is in a uniform magnetic field of 0.30 T. i4,6)4hp.u dqjwqr b xa;rrq1 The current in the loop 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 area q9wgkuole.t t 1/ +0tz$0.25 \; m^{2}$ 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 partdug1dof th6j131ql5 yicle (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 with velynty q8l. zc5q,,w 3ifocity $6.9 \times 10^6 \; m/s$ 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 magnetic m si,fp(k rf*:field of 0k:sr*f( f,i mp.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of/b gmkiuv- *5a z;(jrc 0.30 T oriented perpendicular b5(;jz k*ra-c igmuv/ to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through ybkg( uk cw-(db;s0j8 a potential difference of 10 kV before entering a velocity selector. If the B-fies uc8k jy0b -db((wk;gld 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?