If the north poles of two bar magnets are brough wg bo6.l)yeoo0kn0l2q4t: wk t close to each other, the magnets w)yn e2 bk4o otow06 k.wl0:qlgill

  If the south pole of one bar magnet is brou6l2jb 7t: ogs3jwrp5jght near the north pole of a second bar magnet, the t6s3w7t2 5gorjlj: p bjwo magnets will

  If a bar magnet is diviko0p5oxy+ (f r9z4zl aded into two equal pieces,

  The Earth's geographic North Pole is magnetik43)lrksb 0w wze, 6owcally a

  The south pole of a magnet points toward the Ea+7 b 8xd8d,gm6chvi gjrth's

  An electric current produo:8 mn 3u+vc19 pw: czl:io62ldgolyx ces

  Which of the following is corrfm ox) u-0v/e )(dtpc s:8l(d,xlc fqiect?

  A vertical wire carries a current straight down. To the east of this wirg4ls8k b04gh96 ,bdo cr:bcmwe, the magnetic fdkos br 649 lc8 mwcb0:gh,4bgield points

  A horizontal wire carries a c4gcg52ee:fekhprg of06mck 0p:k- b+ urrent straight toward you. From your point of view, the magnetic field caused by t r+ ek20g:k4 o6egp:bh 0fkpg-cfe5c mhis current

  A current carrying loop of m v 0x2 d4jk1umw8;zhwwire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directi 2d8; 4kj0mxwmuwzvh1on 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. When viewe uaj u0cu+u /8moy;tz3s+y0nz2sbea 3d from above, the current moves around the loop in a countercl b+au;t+au82z3e sy s cnmouuzy0/0j3 ockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiexlr0yak+pin j6r4de) h1 23y old is the

  1 T is equivalent toxcer . ,a1c-qh

  The direction of the force o8i9 wvz.s z:lrn a current-carrying wire in a magnetic field is described by whwr .9s zi:vzl8ich of the following?

  The force on a current-carrying wire in a magnesb p 9 7kgxsg*bsfdf u,9x+s,p1+k hk2tic field is the strongest when

  The force on a current-r5tngsc qw7/ 4carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetq awl9v *c*zx1ic field vector points due north. What is the direc9wqax*l1*vz ction of the resulting force on this current?

  A charged particle moves and :zg 7:hc.tn jeexperiences no magnetic force. From this we can conclude thancej. ::h tg7zt

  A charged particle moves with a constant speed through a region where a uniform/rony(xlv6i1p4 3 pnc magnetic fieldvcrl o/y(4ipxn1p3n6 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 across a constant magnetic field. The magn++hko,kvvnc3xsdm /r8 dv 1j9etic force on this 1vk+ 9 nd +m 8xvj3okrvds,/chparticle

  A charged particle is injected into a uniform magnetic field su/*3;lysuwd qa* thm 4fkm)sm7ch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the par4 myfmtqh *;kw)u l3/msa*s d7ticle will

  A charged particle is observed traveling in a circular path in a uniform ma1 i(no7yq) s b*/9hpoit,ztiq 9l whq;gnetic field. If the particle h/i*(tszlp hy wi)9;t qq9ohi,o qn1b7ad been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circur t2g6 -htr15j/ufj. dqsu7key 2r 4hclar path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of theu.hu ks1erfryctqg22j rj /-5 6 4thd7 circular path would have been

  At a particular instant, an electron moves eap4x mjpn2/ ri7umklz55-.qg w stward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it isj2mx .m/ ln r5-zi57ugp pqwk4

  An electron has an initial velocity to the south but is observed to curve u0gl*d guh20. kppc.dcy 1r-jq pward as the result ofdkq h0cgy.p .dj*2lur1 0g-cp a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis w8 ;;:oumodfdv 7ld p2enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetw pu; vo :f;m287ddodlic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straigze9 z+xwp -dambwn 9d1f r::p3ht current-carrying wire is

  At double the distance from a long current-carrying wire, the strengtz,q g*f v)mox1 ig.gn23yx jd2h of the magnetic field produced by thati2o)jdx1 mxgqf*.gg3v n2, yz wire decreases to

  Two long parallel wires placed side-by-side on /k*wwg ng8(n+f6 gg 9igaiwl( a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wir/+ w9n(ka86giw *ggn(igglf w e 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 horizontalu *mvm f7,px5 ;l(umts table carry identical current straight ,up *mf(m lvmxt7us;5 toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry edoo;fk ;-a+krg+f7axv:j ,*ht-qq /ws uy , orqual currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of tq7r*t -dqsa :vku,wof;o-+rf,hjka/ + gx ;yo he new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towardb47ab k:g2 y 22scxcwd the east alongside and just south of the wire. W wcc: 42gdab72xyk2s bhat is the direction of the force on the proton?

  A wire lying in the plane of the page carries a cu, ct izek)w,; /uqujsy4*vzf(rrent 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,*qu jw)zy;t( zf ,esi ,vu/c4k also in the plane of the page, from your right?

  Two long parallel wires are placed sidei73tw4 g0 bs1lybj ,wu-by-side on a horizontal table. If the wires carry current in the same0,wl3yiuwb jg 71s4 bt direction,

  Two long parallel wires are placed side-by-side on a hore8sp+u oh3b -kizontal table. If the wires carry curre8k hups+o-3b ent in opposite directions,

  Consider two current-carrying circular loops. Both are made from onq 0u:no 9c5*bhz ekx-me strand of wire and both carry the same current, but one has twice 50oez mb9 x:k- hcn*quthe 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. Bot f h3,qfv7oc il0nzcpge )(32vvb+v:ah 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 magnetic moment of the largepqz +vb0 a,vhcgvvnf 7 il33f:)o(ec2r loop is

  The maximum torque on a current carrying loop occurs ae*qlfkv 84 u-uny 0lh t*dgy-un8g).when the angle between the loop's magnetic moment an 0-h ufl-*ul.nggu8yd 8vt yn*qe 4k)ad the magnetic field vector is

  When placed askew in a magnetic fielx3r+kuxr ol f5 8h)-pnpq .oo-y77mpjd, a current carrying loop that is free to rotate in any direction will experm-f)rjpn.qh5o+8yp3 x-7 ro uxplo k7ience a torque until its magnetic moment vector

  What fundamental fact underlies the operation o7h5e5 7bzlptuf essentially all electric motorsu et5pl 7bz7h5?

  A circular wire loop lies in a )yc3peie1 sh:horizontal 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. sp3:ei e)yh1c 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 spectrometer a parti;ywxz3h7b/me/e+mw hcle 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 expression for the mass of tey3;/mx/ +7h zmwbh ewhe particle in terms of B, q, V, and R.

  A velocity selector consists of a chahg-,y-q 5 xuv40dhvc mrged 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 magnhhv,v5-u4 g qmdc-x0 yitudes 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 nz0ikvhe*8be*+93.bgi 6 /uboudv vempf4)f0.60 A is oriented parallel to a uniform magnetic fi*/6i n0iu.*eh39f 8mgb)pdu4vvvefk +e obzb eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currents kjb 4a2,*kwwhqtxq j.i6.2w of 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 straight wire carrying 5.0 A when it is p+le v+ gepev*,laced in a magnetic field of 0.020 T? The wire makes an angle ofvv+elp *ge e,+ $27^{\circ}$ 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 aesljfw w5-1a*(3e6i b n2vu fr magnetic field of 0.10 T. What minimum current in the rod is ne-5 2v1j*fwn3reiabwuf(l s6 eeded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in wzhr1o)m-a9 k a uniform magnetic field of 0.20 T. What is the magnituw9)ak-1hrzom de of the magnetic 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 spe:rzh. (x:mihced 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 spe/.iaaa,8 gpwb 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 northts*qjl-jxms2, )tdq8 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 a speed oixfqevz)3,+u,yx kaey 6w+; af $8.0 \times 10^6 \; m/s$ 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 of wlx9dj, //lnexue3p8gg k09-ryld( d$8.0 \times 10^6 \; m/s$ 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 ofpdmc(/e35l drkp r.f) $3.0 \times 10^6 \; m/s$ 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 bxv0 fw z5/0dhmagnitude of the mabf0z0 vxh wd5/gnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what mmm0;64ri-v5izd:s f tkde9x cagnetic field at the ground, 10 9 r k - ;eii0tvc64mdd:xmfsz5m away?

  How much current must flplrf*p,xe e- ,;sfq .wow 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 cuw5.fh hgkl* ya 004e/ly .m0ufuhyq/yrrent of 5.0 A is the magnitude of the ehlmf0 4yy .*y0w/.l 5 ufuh 0kya/ghqmagnetic field 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 opposiyj0(qa 53 xajtte directions. They are separated by 40 cm. What is the magnetic field in the plane of the w3(ta0 jqxj y5aires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry cu)9ag:byyh7b gqrd,4uq33c * arz.:k iy,ogbarrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 ma q49b)y gric k ahog,.u*y,y:r qdbag3z7:b3. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A hv.k dct:6i,j*j c l;din opposite directions. The wires are separated by 0.20 m. At what point bjh ci:cd,d; j*.vkt6l etween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They a3t.pcf wud-a, re 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 magne u3dtw.p,f-ac tic field does one of the wires experience due to the other wires?

  Two long parallel wires carry cz9 y6w d0v8swburrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force0dys9wwzv b68 per unit length between the two wires.

  What is the magnetic field at 8 f7u5c* htm m+edno7sy,zpw(the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire?cduenh7ty(ms+ m8zw7opf 5 ,*

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field :z0pw 9m+ *t4tap.glxk va8g 0bwtmm:is produced at the center of the solenoid when a current ofgt wta ::+gx*0b mptvp zakm0.4wm 9l8 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries hc. nqzr /o +y0+4upbra current of 4.0 A. What strength of maghc uprq. r 0on+y/4+bznetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gener70w5zeco/ gjw8pn*6 d bv e;hrate a 1.0-T magnetic field at the cer7we p*n568g;hv/d cjebo wz0nter?

  How many turns should a 10-cm long solenoid have if it ip9fxsy;x wmqw6o)o7- mw(x z8 s to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangul(fc6x+iug .xosluzd .jf b90x4f )1ijar loop of 120 turns that carries 6.0 fiul ui4s 91.gjo 6)xf.bxf+djxc z0(A if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of txk 6tyovt8 c5 h 6 a3u2f0etbrt)+l1q0.30 T. The current in the loop is 2.0 A. What is the ma1rxktlc3+ oqv8bu 6fhty 2t5ta 0e)6tgnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-s/2 g5gam, b 1rxf cqa,0nwayq*ectional 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 fi 0zkv/r,w8yo veld of 3.5 T. The loop has an area of, or80vkwy /vz $0.12 \; m^{2}$ 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 uj jj*6gki3g(of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of tijuj* (3g6gjkhe loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magneticljjcke:ef. fn1oy7flej3ddt+ el x o;/)0 ,f7 field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the l od;fdc3ee:jlex ek7 ,/f tj. o)ny7 fj+lf01loop is parallel to the magnetic field?

  A circular wire loop yu7ha8.u7f s vof 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 (chargs6 5tap9w- etge 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 wit 2.joe-we du/rxyp0t3h 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 mc8 ggtx;br20:-as bxof 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the pgmsbtc0;gax b 82:r-xroton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters ab ,q3lj7d 1:mdrly h0t magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of tl tr3 :jdhd0y b,7ql1mhe path it follows.

  A beam of electrons is accelerated through a potmif9txobvtx 6j+s 1 9*ential difference of 10 kV before entering xm6bjf+tov99st i*x1a 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 be undeflected?