If the north poles of two bar magnets are brou, ffoqeq0ahnu.f8h/q) u5s 7ught close to each other, the magnets wil5qhen o.fuf0uq ,s87h) faq/ ul

  If the south pole of one bar magnet is brought near the north polrb 6k3(yl..ey(-u2e nkpnpore of a second bar magnet, t-nu eo.r6pn y(rkyb.3p( 2ke lhe two magnets will

  If a bar magnet is divided into two equal **s 72it:em jy*aq1alzer/plo8)jy y pieces,

  The Earth's geographic North Pole is magnetics6wcbd2v g2t4 ally a

  The south pole of a magnet points towar6 lk+o o05 pdoypv v9c0b/v/tgd the Earth's

  An electric current prod*z96krs, p d6nhsp 2)pvb+nyr uces

  Which of the following is cdkb4 ef ,)icllkp8 d 9gypg8vx/43 t6xorrect?

  A vertical wire carries a current straight down. To the easy 7rw/,np2dy fr:llv :+(v jzxt of this wire, the magnetic fifyv 7:l rjlxzy+2p/wrd (, :vneld points

  A horizontal wire carries a zrg-j7y6 hpzr+6uk/ g:7nqsa current straight toward you. From your point of view, kgzjnpy:r 76gshz- a6+7 qr/uthe magnetic field caused by this current

  A current carrying loop of wire lies flat on a table tojbc:jt*v1rvvm cg:fb.7b;*f p. When viewed from above, the current movfb*;cm1 *tj: jv7f :r.bbvgcves around 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 flat on a table to-se u5lf p5e1lac 1q/dp. When viewed from above, the current moves around- 5a5e1fq lpd/e uc1sl the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneti/ yjczai::ouc+kacm hpm z*82 8 ;;pygc field is the

  1 T is equivalent toi72hm8f2zvj 1e4mz zdg f* 6li

  The direction of the force on a current1 vqz+wdj1b4rzed*j j1zf4p7+.;u cprxde 3o -carrying wire in a magnetic field is described by wh34+pv+1drz zu 7r1.cz*x; 1 wpedqd ejob4jjfich of the following?

  The force on a current-carrying wire in aibrd jdq-o ,2l90ixe( magnetic field is the strongest when

  The force on a current-carrying wire in a magneticy gmeq:obm6) (zs( m*t field is equal to zero when

  A vertical wire carries a current straight up in a region where thep b0nq2 bcc.hauitna 72m+24c magnetic field vector points due north. What acn2ti2 0.c+ p2abh qc4m7n buis the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can c9jhq mwfi4iw *l8z45gonclude t9 z*m8igihflj wq44w5hat

  A charged particle moves with a constant speed thrqejf z+1 9p+ 8 aqi65gdqj255xhzaufdough a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maxaqjdd5 2i feq56x+h8pj19 g+u5z afz qimum when the particle moves

  A charged particle moves across a constant magneti(kz s :2xww8 k(q3s9lidydpw)c field. The magnetic force on this paiwz(xqsd 3 l w s)2wd9(8kyp:krticle

  A charged particle is injected into a uniform magnetic -o xchg,4e*xhk2oc) dfield such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle'-ckox2hoh)g, edcx 4 *s weight, the particle will

  A charged particle is observed** upd g v(f3ml im8gu4.ny; f*vvrdj; traveling in a circular path in a uniform magnetic field.my3* 8fl* (vgvvd;;ifu.pgn r4du*jm If the particle 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 ug)pr ) ,dulifq5xns 82niform magnetic field. If instead the particle carried a chan )sgfp5),durilxq 28 rge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speet4m9 b 0e:ytnl.7wmuy d V in a uniform magnetic field that is directed straight downward. The t:.u9ey y7mmt 0 bl4nwmagnetic force that acts on it is

  An electron has an initial3-p vm 1loa/0bp9x6e d,u hrtt velocity to the south but is observed to curve upward as the result of a magnetic field. The dteha3b9 ox6trp uv/p- 1l0m ,direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform mkk 0h7y-sbpk )sg1h;bagnetic field shkbhyg )kkpb07- 1s;in the +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 producedmuxehtpdqw ,n+y o0f4dq- q4/+ey/ 2j by a long straight current-carrying wire is

  At double the distance from a /stm(:t92j . /wa sp)lot )/zum biciclong current-carrying wire, the strength of the magnetic field produced by that/):2miu t) mjptct (s/aswoc/ib 9z. l wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ide 1f-u)y ix:mf p exfu4*s38kidntical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current mx e:1f3dpik -8uufy*4xs f)iaway from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed si/r;aek-)z h fpde-by-side on a horizontal table carry identical current straighhk /efpaz)- ;rt 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. The mdyal4vl;3(6u-i j*o w.e psrv agnitude of the force between the wires is F. The current in each wire is now doubled. What is th6e;lyo .3 r iads(v-up w*4lvje magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A pc kz81.dxm)l 5tf0fskyf3) fgroton moves toward the east alongside and just south of the wire. What is the direction of the force on the pr)fz8.s fy)gxkf5m10 k 3dlcft oton?

  A wire lying in the plane of the paxtogg8yx- :( mrh;pir; (*g:v(e yies- m4evvge carries a current toward the bottom of the grvvy-hp (- g 4ey ime( v8;rgmxix o*:s;e(:tpage. 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 the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If t 3 bbka-6; )nrf6fk7:fo2 lr)vmbidt i ixe+n,he wires carry current in the same directiknb23 eb v f,+k l;6ad)if tri6:inf7x)mr b-oon,

  Two long parallel wireh 1beqv svs )y7owj6/1s are placed side-by-side on a horizontal table. If the wires carv1 esjs) 1h7ybv q/6wory current in opposite directions,

  Consider two current-carwwd7pqk5* ;4ydh8u x zrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the ra7xk zd8;d *up wh54qywdius 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 made from one strand o+smax8/0k rle f wire and both carry the same current, but one k+0r asexl/m8has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque omr l2*4afk5bbp0dl u. cybjkmk93d ( ;n a current carrying loop occurs when the angle between the bmrbfj3 9d(ak5*2.dpk cy kub lm;40lloop's magnetic moment and the magnetic field vector is

  When placed askew in a magnnz.wcif; ; ov 1() 2fjy5mo-smal 0ldketic field, a current carrying loop that is free to rotate in anyzjmw ;ky0i 5 ofs-(1 fdvmac2nl.;) ol direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motomk +v 5t3s9ghidizf33rs5gis3d9+t3vkh zf mi 3?

  A circular wire loop lies in a horizontal plane on a table and carries curtwnv2+*g+0k(mfqo9) n bhp m zrent 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 tendsfpq(mm +btw)n 0 k9ohgz2*+ vn to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particlved gx9u/wy .*cm( xf-e 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 the particle in terms oum*e/. d(- 9 xgwyvxfcf B, q, V, and R.

  A velocity selector consists of a chargedo,smzf.:to h + 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, disregaohf:o ,ztms.+ rd 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 oriented parallel to a uni9o 4/zw0 czwimform magnetic fic m /iwow940zzeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 m7l.u y8pmdta)g* fg:o7 ,sqr 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 w62/, clqv,*zua v 3o3ppmmlyr hen it is placed in a magnetic field of/vzm, v3m 6 l r23yuap,cq*pol 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 m +avoj11h o0s*7ih4gif(a/tb qx wr;nass 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 the weight of wa(g athi/ ;+*xo jfinrob4s17q0h1v the rod?

  A stationary proton is in a uniform magnetickwogj,, v8 wm8ovo*n 9 field of 0.20 T. What is the magnitude of the magnetic forcwno v owj89,8gkm,*voe 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 speed5*z6ncyw pzn 5 nsjfuym5d( 55 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 o1vwa nq y*g6c: m3mw5 wz1,uonf $5.0 \times 10^7 \; m/s$ 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 norp3mot;l 8-eeg 7 viz(fth 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 ofo9 :m dk3syvia4qjr93 $8.0 \times 10^6 \; m/s$ 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 of6t-9 ts tnkdoksm.y0 )4hhmj+ $8.0 \times 10^6 \; m/s$ 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 kyr9aq5q 5ku( u+rly x :gn9u)$3.0 \times 10^6 \; m/s$ 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 thet0/q7wd7to ae magnitude of the magnetic field at t7e0odatq /7w a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whatibnay1x,)9m5 amyzc2 magnetic field at the ground, 10 y5c)zmima,ba2x ny9 1 m away?

  How much current must flow for o7ld0z5 m 4tjb7le )kh$1.0 \times 10^{-3} \; T$ 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 ioq*u04c e ptn-ypb/y6 s the magnitude of the magnetic field due to tpyb-c0epno4tq6y * /uhe 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 1 uor)5w1iy:itou )q r.0 A in opposite directions. They are separated by ru qti r1.yuo:w5)o)i 40 cm. What 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 5.0 A in opposite directions.eu) n msk79xzf/qw 0u( The wires are separated by 0.20 m. What is the magnetqw(uzune 0/ sxmkf) 97ic field midway between the two wires?

  Two long parallel wires carry currents of 20 4 omr8v-yn-dps7 vo apt5/au3 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 thoounp7v4a-53pvt8-r dmsy /ae two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are par hb pp)d,vk(hw6c j fn(cnu0p vh37 t,,:ri-wuallel 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 0:fp pu7vjdhkt,ih, p rh c w((nb-6,)uvwn3c to the other wires?

  Two long parallel wires carry curr1np2i bku:7pg5f ft8y y9ae3rents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 mgnte9p2fb1u8 3yk5f :7riayp. 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 radia:i8 *4oz jsg*rezp 5yus 4.0 cm when a current of 2.0 A flows 4regais y**o :j58zzp in the wire?

  A solenoid 20 cm long is woundf ey*u. s g5yghgjg)7, with 5000 turns of wire. What magnetic field is p ygugg.)5,*7eyhg jsfroduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and t4 cdx)we ku b35g:db3carries a current of 4.0 A. What strength of magnetic field will it h5uctkex:3db g dw)3b4 ave at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generat*7jn e i*90wgkq 7ucyre a 1.0-T magnetic field at the center? ue7qc y 07nwk*gir*9j

  How many turns should a 10-cm long solenoid 2y1 ;j yd,c .wedy5 r;l2u/polkbalq0have 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 rectangular loop of 120 turns that carries 6.0 t:db4t mrqe9 -A ir:tt -9q4eb mdf its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radi:f o, h2*-/lhiaj lwgaus 0.50 m is in a uniform magnetic field of 0.30 T. The current in tlljaw :2/,aoih- gfh *he loop 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 of cross-sectiona78a s1wbsy8piy i)z 9fl 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 (l.g7l;d f)qu vdy*ne6pl:f0 nji ax2of 3.5 T. The ljdv;ldfgn)yl27( . lp0:fxa6eqin u*oop has 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 magnetir m8 8-.n:-91yjoljg2 h 6vlxi jtxojuc field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thex6j-ou-2gv r18 llj 9h8j ojn.:mtxyi plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform *u*x; h7a dj1znnat7p magnetic field of 0.30 T. The current in the loop is 2.0 A. What is thz;j t7 aau7* 1nhn*xpde magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop z34tj j3yik-pbs:+z s 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 k8s1yvb.arl+f:nn i;particle (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 velocij s)6vz/t re(yty $6.9 \times 10^6 \; m/s$ 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,ul43xvovk2 f of 1.0 kV and then moves into a magnetic field of 0.040 T. What ixlouvf k,4v32s the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a +ow8ibknw4e 0h-7xe sjy3*s fmagnetic field of 0.30 T orienee4is 7 xw*wf3s-+ko0bnjh8y ted perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated thrthuo-*oo 7pd**-1yidih0fqb2 ar9gk l2m- etough a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity o ft*h ldei- g2d2m o0q iuy*-p9t*a1k-br 7ohselector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?