If the north poles of two bar magnets are brought close to each8/(/yfx 8cwdf gkswa9; +iqfi other, the magnets willxfs(/kiwi8qadc; ff+y g /98 w

  If the south pole of ochus3 :zvb7qxp7 o)k5o;kk1t ne bar magnet is brought near the north pole of a second bar mat kkk5bvsc z7q)17upo 3o x:h;gnet, the two magnets will

  If a bar magnet is divided g af68uz*- i:ivah,o)bpi2g iinto two equal pieces,

  The Earth's geographic Northi cczsy7l01q/ Pole is magnetically a

  The south pole of a magnet points towugl307-;lozzqlhp lqw5l*v 9ard the Earth's

  An electric current produalvpwr b4 r a;/m:70jhces

  Which of the following is corred4 (bh3v6 vavq/wkl.wm-du)ma9 b: rx)o8h vg ct?

  A vertical wire carries a current straight down. To the east of this3xc0ges h7cfuh3 izm99yr(8e8oss /m wire, the magfi 3m0x /z rge9uh88 c( 3so9hs7csyemnetic field points

  A horizontal wire ca1r.z nn01sqk .s ax-kkrries a current straight toward you. From your point of view, the magnetic fiel nz1skk.qxka 0-n. 1srd caused by this current

  A current carrying loop of wire lienac5(8 inrytisxqx+ d ,/+,tes 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 , +x t8 t/c,qnxdesir(yn5i+a current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a t2c ybb+c8fig 0zu*wjqi e64- yable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is tyci6b0 uq +4ebczg *2-ji8yfwhe direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetih4skxv ++.kps n :3gi/ upujt:c field is the

  1 T is equivalent totbyhd3:)r *f 1 zuzkg7

  The direction of the force on a current-carrying wire in a magnetic fieldl ,j6nll/ocdt 6t3z;r is described by which ofn ,6 rojclz6;/ ldtt3l the following?

  The force on a current-carrying wire in aq; n d zz /l3vwuvp. 7*6j6iu53,lrh pitopk+f magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fieldzv+kzr.w kd*cu,- u0s vdq2v, is equal to zero when

  A vertical wire carries a curren .vj+cd d +:m+mmckcgnbx)8v8l gv :5dt straight up in a region where the magnetic field vector points due north. What is thmn5b k.gc +gcvd:)8cmd:v +8 d+x mljve direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. 97o6t:1m vntdj9s khh;ok k )c From this we can conclude thk1 o tc)79n s:jh;tkovd6kh9m at

  A charged particle moves withxa16sjmqa ez5hvev4-t2 )/i z a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straigh)s xe2jq-tiv 1v 6ema h/4azz5t upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves acp0bf6wg-- l etross a constant magnetic field. The magnetic force on telwtp6 b-0 -gfhis particle

  A charged particle is injected into bqgw+ o da6:s2se2(ada uniform magnetic field such that its velocity vector is q dw:baoa(e+sd g2 2s6perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path ipnt9ka*wss 2( um:n p3n a uniform magnetic field. If the particle had beenup9 (ts *n: pmwa2snk3 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 unhjk ;zqn+::+5 kkra kuiform magnetic field. If instead the particle carried a charge of +2e, the rajkar5u :+kq; zk n+:khdius of the circular path would have been

  At a particular instant, an electron moves )dox 5joiv k(.eastward at speed V in a uniform magnetic field that isj)x.ikoo5 d(v directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwar/zgjl99) v09f:x (qowcm;3eudccec ; 1p utsa d as the result of a magnetic field. The 3(scum; e c) f/v999zcj:awd0c tol;qeup1 gxdirection of the magnetic field is

  An electron moving along the +x axis enters a region where o0a8;wodh i6cqubkc(q r6.6 zthere is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on thuoqa ;(0b6 qdco c8zkw6. 6rihe electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying .snqykeytye- 1r-zhskqq7 z/(2d 9 /awire is

  At double the distanc oexkwk iwni:y2z.q12 +dl7b:e from a long current-carrying wire, the strength of the magnetiwb: zq21i. k +k2inwy:7 xodelc field produced by that wire decreases to

  Two long parallel wires p * , fxroxe8hof1( )zxzte(z3llaced side-by-side on a horizontal 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 yloxxe(orzx h 3zt,1f)z(e8*fou. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placedb t0(xw8b f2m o2+0eaeb+oazb side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magneo toa2+8b0mzb xe0( fbwe+ba 2tic field at the point exactly between the two wires

  Two long parallel wires carry equajj4m0*k(venvuww y , 4l currents. The magnitude of the force between the wires is F. The current in each wy*me k(0v jnww4, v4juire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. Aodi5)a2 x +3aa cexzy5 proton moves toward the east alongside and just so+dayoxza 52e iaxc )53uth of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page ca/h:ly-sgm8dzf3 z0 h 59ytook rries a 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 ink8y5z:s tyhz-o/df3m0olgh 9 the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If *gas0c)x5-7t hgmao nthe wires carry cgt-gosmh* xa5)0c n7a urrent in the same direction,

  Two long parallel wires are placed side-by-side onse cs6 pka:x7/ a horizontal table. If the wires carry current in opp/6acx ssk e7p:osite directions,

  Consider two current-carrying circular loops. Both are mad:y*oyez/0- rqsm ln 7ue from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the cenqeoz/lm*sn r:-7 0uyy ter of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loopcx9y vso-lb8 *s. 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 magnetic moment *cbvxo89syl- of the larger loop is

  The maximum torque on a current carrying loop occub4g:+uy .jiha rs when the angle between the loop's magnetic moment and the magnet 4bgij.: hauy+ic field vector is

  When placed askew in a magnayf(une91;rc9ijtr 8etic field, a current carrying loop that is free to rotate in any direction will experience a n 1e8ij9urtyc(ar;f9 torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all ele b0 ytrpi.9snc3s,+ lkctric motorsr+3kpn,bciyt.0 ls s 9?

  A circular wire loop lies in a horizontal plane.voh6wj0o owx.49wt p1:qa l t 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 the torque caused by the currents interaction with the magnexao:t.w poo4h.1jlw 0v6w9qttic field?

  In a mass spectrometer a particle of mass m and charge q is acc8; i qlhi9+nfrelerated 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 terms of B, q, V, and 8n;l9iqrh i+f R.

  A velocity selector consists of a charged particle passing through crossed1 p h7+ w+rsw k9*vk3ius- n3af-mwcxd 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 toward the east, and the magnetic field is directed to the north. pndcv* 39+-uw-1wf ixmshk 7aks+rw3 What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uaha ovd9)ntmm7*r f ;;niform magn;;t7 m nh*9vm)rdoaaf etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in br;chn2a cwlc5d p23.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 isl80-hnuj32. coq mdej ygk7h8 placed in a magnetic field of 0.020 T? The wire makesh3.juoeky- g mqc 8jn80dl27h an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a m 01dp30f.bt8nsf p vogt94bwhass 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 tdtpb.gbw80vs13o9 p 0fn4fhforce to cancel the weight of the rod?

  A stationary proton i) ij :bv r;;lh6sp2urqlw z(+js in a uniform magnetic field of 0.20 T. What is the magnitude of tu6jbhqlw; 2s rlz:+rj iv)(p ;he 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 8b1uhbczix;wrg/gk- pmh s;t 7/t: c9 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 spgvv2)u+ p kq,7zq p j9/gdv4oneed 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 wacz*f87 w,/ o 7ddiudzith 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 with060 lquht2 1v6j93lb sbf fvge 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 )fekn*2nh y3 j: )faioa 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 ovh4(8iiyg.3 +rsz.gz;/an ; mcs qc uz0kfs5jf $3.0 \times 10^6 \; m/s$ 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 magnituir./c2pw ,k z *,62hae8x pb ozv3pytvde of the magnetic p p/v.cwreb6 ,iy, 3z2k2ph8vzot a*xfield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates atpojmn9)y *f5) u9tvkfif)x /52wdx what magnetic field at the ground, 10 m 92wkfmxt tv/fdnjp )9*))ofux5 iay5 away?

  How much current must flp9vj ti7mf/6 m(sc:fiow 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 currenlnxg /) z x5f+8xztsk r++1odxt of 5.0 A is the magnitude of xd8xg5rzx+ ++ xoftz s/k)1nl the magnetic 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 wires9ye4 x;xk ,mid carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at ,i4k 9xm;eyx da point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A an;/7 qy3vl 0kysk f;hzrd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fi hzk7/fvrs;y;q ly30keld midway between the two wires?

  Two long parallel wijhm(a bik(bz50a89 33be hy,xquc 2pqres carry currents of 20 A and 5.0 A in opposite directions. Txbpkhmuja8 3(qh0q93 ibeca5( 2b,yzhe wires 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 directir9spg :wco07ybb,o *pon. 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 on7b*,y:s0pp9g obwr oce 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 direct(*(gsgy.e4jlzp , dtaie664 kkxn/ ceion. The wires are separated by 0.30 m. Finde.i,gj*g xk p cnaedt ys446 /6kle(z( the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of awfax 65uq-;;hdfe* iwire of radius 4.0 cm when a current of 2aq6ei -hf*xwd5;fu;a.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. 0kf rl2h ,p*ya What magnetic field is produced at the0r,p ak2h lfy* center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turn4.v w0,b.s* i; raiq0ipn reygs is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field wille. ;a0rw,yr bg.i4n*0piis qv it have at its center?

  How much current must pass*tqv;gj8 zpki + s3mshu3i+9k hx:k1c through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the k1*p+ g3qh8x m3i v k9:jk hztcusi;+scenter?

  How many turns should a 10-cm long solenoid have if it is to generate 91e sln nlj66 py.ffw32qljt2a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magneticn)w36 jvl7jti c*x 9il.zjbr7 moment of a rectangular loop of 120 turns that carries 6.0 A if itjvjiti.zwbl7) l7 9r6j x 3n*cs dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic x7a /h vp4i+.;ysjwsu, ipg/ ufield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the pl y7uji;sh aupgxp4i+v w./,s /ane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectionalspnn,yhg3., ml ay,:n 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 Tbc vh ++yfb3(c. The loop h b hf(c+b+3ycvas 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 fi:o( 70dumf3 8jwfffneeld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic fielm 0n8 j odfff3(:ufew7d?

  A circular loop of wire of r3qu r frukc7g8xr7ke fm/8k+ .adius 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 the loo rr7fr kckgq.8k3e8u7+ fm/x up is parallel to the magnetic field?

  A circular wire loopj;bcz(h9i zz5 of 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 (ch grl2:ck 3t(ykarge 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 withw)1bft ga4x7 ;vpy1mh 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 kV and then moves into a magneu)z4 kjik e9;5iom1 tqtic field of 0.040 T. What is the ra; qm4j9z5 1iokkte )uidius of the proton's resulting orbit?

  A proton is accelerated from rest throu9j6g v;j)wc:wzf 2i. bprwa0xgh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius o frv)2i.6:;bga jw xc0p9jww zf the path it follows.

  A beam of electrons is accelerwbad8 o b4r ,f6e 7qq4ht7h8viated through a potential difference of 10 kV before entering a velocity selector. If the B-field ofb74ar7bqw ihqfo v,84 e 6ht8d 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?