If the north poles of two bar magnets are brought clz8keo9y s-okam 00*gkj (dua4 ose to each other, the magnets wgodj ykk 4ek -m zaa800so*9u(ill

  If the south pole of one bar magnet is brought near the north polej1gq 2)e 2v782fosnabh c6f ee of a second bar magnet, the twofba21) 8o 7fnge2evqhc2es j6 magnets will

  If a bar magnet is divided into two equal pieces,lk5 j :;ldp,ey

  The Earth's geographic Norvra- m7/1xlwnm,x3 sx/ svx9 lth Pole is magnetically a

  The south pole of a magnet points toward they ,e)+o(pd znu Earth's

  An electric current produibj f5g-5ihwx3d4e(nces

  Which of the following is correct?01 xrbs7)a )w bngv(xn

  A vertical wire carries a current straight down. To the east of this wire, o7uwmr( ;tudm: v6/sothe magnetic field ro (u:; wmv6utos/d7m points

  A horizontal wire carries a current st3zx.u14hci3q hhy 8tlg omt+* raight toward you. From your point of view, the magnetic4o1ctz+mlqxghh 3*t . ih83uy field caused by this current

  A current carrying loop of wire hoh,za3- cy b3o*wx dp/i(n5wlies flat on a table top. When viewed from above, the current hibch 5nx a o -*pdw,w3/oy3(zmoves 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 hgm s1(b+hhfjdpl.2onc )8 q;:g5 ojgtop. 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? dhogbhq:g po(;51j8smc)h2+ g jnf l.The magnetic field

  The SI unit of magnetic field is;kedu ,.-(w6eggku;ska g ea6 the

  1 T is equivalent tox a-pe9 l8 0rikbfopq)wl:b9d1y2.mo

  The direction of the force on a curr+n ns +tjrqauq8)3x 6yent-carrying wire in a magnetic field is descratujn ) 8q +qsrn6y+3xibed by which of the following?

  The force on a currena qmv dqnw q4+y3w3fje;.-vrg8j:(ig:*r lydt-carrying wire in a magnetic field is the strongest when

  The force on a curre5iysn.shqg qc8 * 1-kqnt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight ut 7cl5t, iedm4l )ui2rp in a region where the magnetic field vector points due north. What is the direction of the resulting force on this cucmduirl7 )t2, 4itl5e rrent?

  A charged particle moves and experiences no magnetic b *s39 8x5k i9nqyasfiforce. From this we can conclude that 9s39x y5* s8fbqaniki

  A charged particle moves with a constant spep )xn6b(vyrt (ed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force ac6yxb((nprv) tting on this particle will be maximum when the particle moves

  A charged particle moves acrvmbz/z g4/ e7s6+afguoss a constant magnetic field. The magnetic force on g46/z avs /+u7 fzmgebthis particle

  A charged particle is injected into a uniform magnetic field sumd 227mji; 9p ikdkpeu/)8nfv p/xzg 6ch that its velocity vector is perpendicular to th7kd9x) mdepk 2;2f/mi6niu v/8z pj pge magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling lebp; d+88dnwin a circular path in a uniform magnetic field. If the particle had been trw n p8l8e;dbd+aveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular p +b *yji,7-8vksa7o dh *okzarath in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path7-ad ao+yko *izrhk* 8bsj ,7v would have been

  At a particular instant, an electron moves eastward atgccv26 z+ufj 0 speed V in a uniform magnetic field that is directed straighu0gc+c 6vfjz 2t downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south nod2, ;u9j / uzji*jxdbut is observed to curve upward asudjj9jix n;,2/ udzo * the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region h 6dwmoq 2)eb:where there is a uniform magnetic field in the +y direction. What is the direct)m q6 e2obdwh:ion 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 straigh,enldx jo+7ipki0t 7: t current-carrying wire is

  At double the distance ft k5vn1xoq;o2 6pm n.hl6s7h from a long current-carrying wire, the strength of the magnetic 2nsoh.lxvpfnq6ho56; m7t 1k field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carcdb(8 x86 l 2vqaxx1e0c5qxqxry 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 b dqaq 8c508xx1 vxxl(qxc26 emagnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side +4hhga r.g dih,g,9ha-by-side on a horizontal table carry identical current s.,ahdh ri+g4 h,g9 gahtraight 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 magnitude of the force betdxndze9p/kl0zk l/u a: q6+ u2ween the wires is F. The current in each wire is now doubled. What is the magnitude of the new forck+u p6enzxz/lud0: l9k/2 a qde between the two wires?

  A long straight wire carries current toward the east. A pro2.ket6k u r8daton moves toward the east alongside and just south of the wirekd. 2atr6ue8k. What is the direction of the force on the proton?

  A wire lying in the pl ew t,6gnn bfr/ i6v-j;w:1khwane of the page carries 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 in the plane of the page, fr 6w 61;j:vfhe-iwkw/ gtnrbn,om your right?

  Two long parallel wires are placed side-by-side on a horizontal tabqj)0zaurd d vrla23u2nd+- 4 cle. If the wires -l2udnj2d z3 dcvra0 au+r)4q carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontalf4hc , qndm-hsbbv(at5bh 0,6 table. If the wires carry c fh0 v6-,h,d5b(b ntbs a4hqcmurrent in opposite directions,

  Consider two current-carrying circular loops. Both are made from one/ *7syy.gnews 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 /ngs7y*se .wycenter of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Botood9r dco ((ub pdg3a/9 -re/ih 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 ofrr 9ec o9(gbau-d dio3/p/ (do the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cure2j xz2 lwt+8tmen5.jrent carrying loop occurs when the angle between the loop's magnetic moment and jm .tew ne58z+22ltxjthe magnetic field vector is

  When placed askew in a magnh.;it r g(su4tetic field, a current carrying loop that is free to rotate in any direction will experience a t4htris(. tg u;orque until its magnetic moment vector

  What fundamental fact underlies the operation of essentiall ac(l67a) db n+lipbv w(x(c.dy all electric motors6 ( +pcbi7. vxw(n(ba)dla dcl?

  A circular wire loop lies in a horizontal plane on a table and carrz * .w9f*pq 2j (x8jk a(yoa6ayfb5bfiies current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the ni zo**w.9fa(j6xay8 ( bb 2apykfj5 fqorth 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 magnetic field?

  In a mass spectrometer a particle of q1byr 6v35e bxmass 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 magnex1b 3 vr5ybq6etic 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 R.

  A velocity selector consists of a char+(n(nmvt2,w dk*cetb ged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposkw dt* nc2ev, (nb+mt(ite 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. What direction should the electric field point?

  A 2.0-m wire carrying a currzh pck /5/uxa:ent of 0.60 A is oriented parallel to a uniform magnetic:5uap /zk/chx field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of jklhf haof1nxj-d(4 2t (-qa- $30^{\circ}$ 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 ioo. -qgv +6 erz+zo,z/nz+s pwo; :bqjt is placed in a magnetic field of 0.020 T? The wire makes an angle ofoez/,g owq;s n:bz-rz6q+ +o .ozvpj+ $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and is r; 5chgp;vejer4aka*(8ge9k in a magnetic field of 0.10 T. What minimum current in the rod is needed i 54;c(ej ah* gergkvrpe;98kan order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.2nnfwbk/8/j t.4m3 ys c0 T. What is the magnitude of the magnetic force on the s n//jnm3kb. tc 8y4wfproton?

  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 wizz0 5h( nsobd3th 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 sp qnqb )dt**q.beed 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 da;r)fwl/sb ad 0d6 6mgd *o4rwue 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 with a speed 93s)zg4qhe o6dq:sm (/ mlbsd 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 yz(udt7ml 3*:ao/fvolgwo zmil6 5r1 7 :+ ntespeed 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 of vvwg1sq(* k8j $3.0 \times 10^6 \; m/s$ 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 zr1p1re 5gl-an, u ,bdwire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from theu,n5a,ze11 - lgrrdpb wire?

  A high power line carrying 1000 A generates what magnetic field at the 66u yh71;m xg 6nkpodrao8*wmw09e la ground, 10 m away?;7x 6m8r yo6n*g dk l ae1wp9oauwm0h6

  How much current must f2,a apfp(t2vv-x xw 6hlow 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 5zg; lv4lc*7s h3rvg* h.0 A is the magnitude of the magnetic fi;*glgl r*3 hvcszv 4h7eld 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 wire;l ckxkt*yu- zx7v .+js carry currents of 10 A in opposite directions. They are separated by 40 cm. Wkc.kt v + xluzjy;-x*7hat 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 Aq5ckd9gr 7 1 (sz/nkii and 5.0 A in opposite directions. The wires are separated by 0.20 md1qk is(5/n 9icz 7krg. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and h0dmwuzz:+cru t ( la67- /qgq5.0 A in opposite directions. Theg(lqhmq uwtzcrz-7+u/d a06 : 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 direction. Thi+lowj:+hi 0kb 3ma/k ey 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 magne+ l+bio jh3kakw/ m0:itic 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 opposite dir;ejqc/ zn n0 k;bq7ge3 g74ougection. The wires are separated by 0.30 m. Find the magnetic force per unit length between the tecg4u n3g ;oq/jn0ge;kb7q z7wo wires.

  What is the magnetic field nnb9 x1kl9 qqku)+ qb(at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire bnn bklq+kqx9q1)u(9?

  A solenoid 20 cm long is wound with 5000 turns of wire92vf.:t i5t ljm0a sxu. What magnetic field is produced at the center of the solen:m .0t5i9a2 xftvjslu oid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cursc (sqxxh9 .9grent of 4.0 A. What strength of magns(x.q9 9shgcx etic field will it have at its center?

  How much current must pass through a 400 turn 8xwas ;+(4gwzkyxak u2df7 g (coil 4.0 cm long to generate a 1.0-T magnetic field at ay8(ka(47ud gzfk ;+w2g xwxs the center?

  How many turns should a 10-cm loz9wv/,h 9n bucng 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 j;6lt 7il 8iurdw76deturns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cmtd67 wuj8rl7d; e6iil?

  A circular loop of wire of radius 0.50 m is i2z 3i6sy7pbu vn a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plazi3s2yp 7b6 vune of the loop is perpendicular to the magnetic field?

  A circular loop of wire of)3h-tbccboi824(xdztb d6 qi cross-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 a magnetic fi+4ib;ek)cl gj wrn5 (held of 3.5 T. The loop h;lrb(5 k+ cj4wg neh)ias 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 uniformwcap,*r*fe,6yuux0m magnetic field of 0.30 T. The current in the loop is 2.0 A. What iew0a*pfmx cy6r,,u *us the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fmpjmul0 ek(8 9lqwt:dr.tn 5)ield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whe0 p5jwt mk 9emur:lqndtl)(8.n the plane of the loop is parallel to the magnetic field?

  A circular wire loop ofpx z*)mdo-fn6 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 (charge e) w1 ybx+47onv/ wrkuy3 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 vo 9:j+elxxol* kr; lj-mamg. 0elocity $6.9 \times 10^6 \; m/s$ 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 magc3:5egf c by9xtb0( nonetic fi0cbb59:c(f egnx to y3eld 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 bl9jtx1tk/c umo7m 0l-6og 7ac2)dx hfield of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of tx/ omhk19ot-b2cdt u0 lc)gml a76x7 jhe path it follows.

  A beam of electrons is accelerated through a potential difference)6 lnmdf(m*z)v0p xsn 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-field is required if xp) mnzf0 (ns*lmdv6)the particles are to be undeflected?