If the north poles ofk 7vu.4d 4 +exazq.+y ul/wqe48gdo no two bar magnets are brought close to each other, the magnets wilg.q yuladon. xv/4oq44d eez+8+wu7 k l

  If the south pole of one bar magnetwf/6hu g+ e8wg:7yybv is brought near the north pole of a second bh6vu 8 wygw:+ eg7yf/bar magnet, the two magnets will

  If a bar magnet is dividex t 20h9uaat:ck 4ujw 5sq7ibt5k1at;d into two equal pieces,

  The Earth's geographic North Pole is magnetically au2gtj 8r0(wpu g xpfw0xp0c .9

  The south pole of a magnet points towsl,c cqe 44gbxv9 o93uard the Earth's

  An electric current pg3f)uce5x+ *zehzc(y roduces

  Which of the following is:-lms06 cqyxik+ a( gwv-pf1j correct?

  A vertical wire carries a current straight down. To th4, (yvwo-y 3qf:ruhcr qjp phhjoge (94- 2b/re east of this wire, the magnetic u,w- y pr(2o pgq hbjyf443r ehrh9(/cjoq-:v field points

  A horizontal wire carries a current stra 1 s9d,- yonpq:h(.f:mozouu sight toward you. From your point of view, the magnetic field caused by ,d f.m 9-s qzso:1o:huo(p ynuthis current

  A current carrying looy6eckz1p7- 3klseb2a 1nfx i +p of 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, outside a12el7iyfk3z+pbs1nkc-x6e the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When view7cdr(5 soz 8 /:pn4tnmitrs a3ed 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 ms7s4z (m/diaor 5 8r:nn3tpctagnetic field

  The SI unit of magnetic field is th 3x gspjzer6 .;e1kjt6e

  1 T is equivalent tog;d n jkg(8yi+64yun+k vxw: m

  The direction of the force on a current-carrying wire in a h+8 fvo0sz jl4magnetic field is described by which of thesvojzf8 l0+h4 following?

  The force on a current-carrying widd9(zvr zlo (2re in a magnetic field is the strongest when

  The force on a current-carrying wire in a msh6.x a38 qed /myz 5:yditog(agnetic field is equal to zero when

  A vertical wire carries a current straight up in a region whe5sjyf4 1xdt2zj cz3kv -.g1ko6z/ qcpre the magnetic fielq jzg/5yjsof43kctv6x1c2.pz kz -d 1d vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and expe;lgw0 be+me .q1 fvd 0w7u;mwifmw5-sriences no magnetic force. From this we can conclude thatw0 +gq m5fwd;flis-1w eb. 0uvmwme; 7

  A charged particle moves with a constant speed through a region where a uniform *i*3*h kh-pmubaze e), ihyk; magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particlm) a*ih khik3e ehy b,-p;zu**e moves

  A charged particle moves across a constant magnetic field. The magnv07-/cd *am6* dlyphzdqe )ecetic force on this ph pc/lmdez) a6-0 *7ddeyc*v qarticle

  A charged particle is injected into a uniform magneti-j)bkls zyp6 -/ a;igac field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, thejk--g6al ziba/ sp;) y particle will

  A charged particle is observed traveling in a circular path in rrhexmrwg/ o h5c0+ 2.a uniform magnetic field. Irhcrm 5/xe2h+o0 .wg rf the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge -j:qyqt 7u2 vr6m/3ulzfnmtev) o8r+bp;qb* of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circ*6objn +lvum- p 8e7 qr)u t:z r2mq/qf;vbt3yular path would have been

  At a particular instant, an electron moves eastward at zpxmoqg3 gh es1ro 4qi*j;zry7/(r 6*speed V in a uniform magnetic field that is directed straight downward. The magnetic fo6qjr/1 g7 z4 ep qm*osohgr *i3(y;zrxrce that acts on it is

  An electron has an initial velocity to the south f 1nrd f1to,; hy*fm4gbut is observed to curve upward as the result of a magnetic field. The directio *dmgon,ff;1 hf 1yr4tn of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unifo 6qmkm/e(, 5oc6pyo4e l5ubpsnhsh6-rm magnetic 5p6ohk5eqn/ sye(6, h 6 cmbp- um4slofield 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 produced by a long straight current-carryingmz3x -6blu+rq wire is

  At double the distance from a long current-carrz3,o sd** sptlying wire, the strength of the magnes*, zotl 3p*sdtic field produced by that wire decreases to

  Two long parallel wires placed side-by-snm t22mn6 yg0ig p(os:ide 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 you. From your point of view, the magnetic field at the point exactly mid:2t0yp 2(oimgns6g mnway between the two wires

  Two long parallel wires pl (jq4 q7itj eedlz39ke9o-e5xaced side-by-side on a horizontal table carry identical current stj794zkt 5jq3q9 eeo-xed(e ilraight 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. uv z lj-km/2;xThe magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitl;zujvk/2m - xude of the new force between the two wires?

  A long straight wire carries current toward thexi1uvm;9 yfu. a6)c6 9novpdw east. A proton moves toward the east alongside and just south of the wire. What i u v)wn1; .xdyf9m9c ua66povis the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the/7cl 6p8 n* wzbmgx;ya 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 the page, flgn ;xc p *ab7mw6y/8zrom your right?

  Two long parallel wires are placed s/qq t;(;5 ewgtrxse +3hqyp6hide-by-side on a horizontal table. If the wires carry curret6 ept;qqs x +e ;5w3yh/r(hgqnt in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. m) es3x5ih b; t6lcbp8If the wires carry current in pht6x e;l3b5sc m )8ibopposite directions,

  Consider two current-carrying circular loops. Bot*;9d7k9xkhnh-)ej 2blr hrs dh 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 field at the center of the smallen*-r7 l hd2e h9bsr)k;d9hjkxr loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one stra+t (j;gpn c;alnd of wire ana; +jt(g l;pncd 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 larger loop is

  The maximum torque on a current carrying loop occurs when the angle betwepm-la f;o s*s pz7(- 1veddezmx.3h9een the loop's magnetic moment and the magnetic fis -o 9(7hza-z *s1;lmfe.pde dvx3pem eld vector is

  When placed askew in a magnetic field, a current carrying lo idy u4)d*ujv/1s0oouop that is free to rotate in any direo 4j s0 iuvd*/)1oyuduction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of ax *,e9eaq5xn4 p m;e syr/y2ero2y.i essentially all electric motors?yey*s5ap22y4 m /eer,r neax9i; .q ox

  A circular wire loop liee) z:pi3.telgt. s g0ms in a 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. Which side of the coil tends to lift off of the table because of the torque caused by the currents interaction with thei):g0gm t.estelzp. 3 magnetic field?

  In a mass spectrometer a particle of mass m t rra60jwd ;phk7474 b:rtevn 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 perpendpt7 hted rnab:407w; jr4k6 vricular 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 consists of a charged particle 5+z(,5 xpgs fju9v*abi f oe-zpassing 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. In a velocity selector, the particles move toward the ease5*ffsizv x5p (bo-g,zaj9u+t, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a cua j ktw*5ud0:crrent of 0.60 A is oriented parallel to a uniform magnetic field ofkwta 5 dcj*u:0
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curla+ex .z9 c6aarent 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 straigtk((8eh 5zyd-n:a 2mjge lm2t1j)py(u4ucb o ht wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle ofmt ekh2y(n :(u14)epmocz -l 2y ajg(dbu85t j $27^{\circ}$ 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 a magnetic field op(d.hedk7xotg( *cu6a me1 7qf 0.10 T. What minimum current in the rod is needed in order f6(m h o.xea1(t d7epdck 7uq*gor the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field ub.hznv u6i6 6of 0.20 T. What is the magnitude of the magnetic force on the prou66b6h vnizu. ton?

  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 with2d 5qjaf3pqg 0 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 a r6w:/ wjh -xgzspeed 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 with speed 4t hyubxi/6 ym9zr9firyvy 9pu;3 ;qx- z9iz5$4.0 \times 10^5 \; m/s$ 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 speeauxb/xe9/io .t /pg4e d 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 of kff8sn04 zs: y$8.0 \times 10^6 \; m/s$ 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 speedu6tp 1ss z);g20fctrp of $3.0 \times 10^6 \; m/s$ 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. What5 egr)z+ si f77m1hhid is the magnitude of the magnetic field at a distance of 0.15 m from the wire?r1si)d+h g5ef zhm77 i

  A high power line carrying 1000 A generates what magnetic field at the ground,bhc2,e jg +c.p) .hsgs 10 m away?+)shch.jgp, b2cs eg.

  How much current musk,4gf5s 9zglf t 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 carrying a current of 5.0 A 5ox4dq4y;a )ihz92tzml 9aah is the magnitude of the magnetic field due to tht )hiz4;z25amqd 4oya xa99hle wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires cathgcs+y 2ro1f5/0t hfp( eh b7rry 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 a point that is 20 cm from one wire and 60 cm from the othet+shhbth0 /or(f 1py ge7 5fc2r?

  Two long parallel wires cab0n ur(bq9j9 lrry currents of 20 A and 5.0 A in opposite directions. Thubbnr (9ql9 0je wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A t py4kjs 4c,voj(t *3gin opposite directions. The wires are separated by 0.20 m. At wh3vj,4opc4 ykg(t* tjsat point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0mh/zm) o7vi5; i-whhgj1sy c1t 9in 9t A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in yt hcmhm jw;7/ngi)5zi9si-t h1o1v9 the x-y plane. What magnetic 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 A in the oppo;qwzxqn-uyfnt8 e :5fv y,*3psite direction. The wires are separated by 0.30 m. Finwn p5 q8n;f3f *tz-,y evyqux:d the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loou8 -v tgr2xcgp88wdf: p of wire of radius 4.0 cm when a current of 2.0 A flows in thdg:g-cr 2w vx8p8 u8fte wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic b6p 7zgexy/h1 field is produced at the center of the solenoz/ xy g67hb1epid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long anq ml (1t( g*kgdf 9,gm2gzzb0zd carries a current of 4.0 A. What strength of magnetic field will it( glk*qz9f1gmg ,2 (tdzbm0zg have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a j)*2fvys ;nc a1.0-T magnetic field at the center) f*;jy ncvs2a?

  How many turns should a 10.o +g*fh ozz8xdy9w 6 fr7zo+j 27mkhv-cm 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 rectangular loop of 120 turns w +*bovx:ea7zn8(ba iaa0zb/ that carries 6.0 A if its dimensions areaz (ina:07b8zaovbxw +b*ea/ 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30n5oqbv6 m7hx iy):fn9 T. The current in the loop is 2.0 A. What ismoxn f9vbqh7)5 :n iy6 the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cra9d : -r871ww m6vukx1gxnyp qoss-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 drw jym7u.qn(-3fsp/2.0 A is in a magnetic field of 3.5 T. The loop has an a.nr3msqj- /ywpfu 7(drea 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 uniformmm u bidvpj 68*iolnbf*60b77 magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque wm6bvf*ompun i7 j7b i806* bldhen the plane of the loop is parallel to the magnetic field?

  A circular loop of wire onh:m3ekg:gg 9 f 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 magn:g:ke g 93gnmhetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ahvo3 uq (.-n1xbvat,. ;acohy rea $0.25 \; m^{2}$ 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 (cha r;n5: lh3*u3ce nxrfcrge 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 vegh03swu e 1:ar(d*ceklocity $6.9 \times 10^6 \; m/s$ 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 5usa 3vbwcz0 s952td oa magnetic fiez32wtc bsu ao 5s0v9d5ld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic dgm,-rtr- /uo6e dm5dfield of 0.30 T oriented perpendicular to d mo,6/dt -m-d5gu rreits direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accev m ts:+z5)*0jbk qqudlerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-fieqk)0* b+ v 5tmdszqu:jld is required if the particles are to be undeflected?