If the north poles of two bar magnets are brought close to each other, ld:qcf d*r q4/uoqm 0*the magne* co ulqdq/q d*:4mf0rts will

  If the south pole of one bar magnet is brought near the north pole of a seconiyv5*+ v(jcx2kb)n/ /q oltj cd ba/j* yqv2l oncc(xt5k)v +bj/ir magnet, the two magnets will

  If a bar magnet is divided into mug,rw t,g 1u/c:pc1mtwo equal pieces,

  The Earth's geographic North Pole is magnetice7+ w8zssqwf0 ally a

  The south pole of a magnet points tow 9;gb7siad57vclqgmq; )e 6oqard the Earth's

  An electric current pk,6 -ll3iwbw iipf:);.xua s rroduces

  Which of the following is correct? atwp3:;6gkkc

  A vertical wire carries a currentxxp6+o)nim0 m straight down. To the east of this wire, the magnomx 0mipx6+)netic field points

  A horizontal wire carries a current q+* w k sztgqe7 a *j mt;8/3akvxixp2,jk-,pestraight toward you. From your point of view, the magnetic -/m8*qijaxkjzs;g3evk ewp k* x2 +7 qa,t,pt field caused by this current

  A current carrying loop of wire lies flat on a table top. When vi4eb.x).oo w2n4 yq/yn wuy13xfy0 obqewed from above, the current moves around .ux)w .b yq4woy1yo0yeqb34x2f n / onthe 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 of3 o*b4a4 ewz+vnvb)u n w:d+ab wire lies flat on a table top. When viewed from above, the:bbawuz oe+vv4)a* d w43nn+b 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 magnetic field

  The SI unit of magnetic field is wi0:jz scz 1q:the

  1 T is equivalent towzle w9-dc-/)db fz 2u

  The direction of the forcu1ugh +)x ;jjue on a current-carrying wire in a magnetic field is described by which of the fol +) ujjhuu1xg;lowing?

  The force on a current-carrying wire in a magnetic field is the strongest whenjee u r0x;lweqh0h*(/b1*u rt

  The force on a current-carrying wire in a magnetic f;8f6 y qlnye0kield is equal to zero when

  A vertical wire carries a current straight up in a rk3okobkb;z) .v q0t v1z g8eo0egion where the magnetic field vector points due north. What is the direction of the resulting force on this curr qo zve.kz0b3v1k 80;b )tkgooent?

  A charged particle moves and experiences no magnetic force. From thivth ;8zo6* 0kxfs bvogd -g//;s8 jyhus we can concluo;o- /kvj*g gyfx u;0stzh/6 h bsv8d8de that

  A charged particle moves with a constant speed throughopy*+bzpqt19 i n jn1e08 il/j 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 maximum when the particle mo 9e nlb0o1 j pqzit*py8i1+jn/ves

  A charged particle moves across a constant magnetic field. The magnetic forikqe .adseye8zz2kuo;-9)- cce on this .kqdy8o-aez ec -k; 2se9zi)uparticle

  A charged particle is id ;r-9vm-b.of:eb zuj njected into a uniform magnetic field such that its velocity vb fe- rmj.z 9d-ubv:o;ector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travw.l a 2d;;5 vnl2kkx+ukizyp-eling in a circular path in a uniform magnetic field. If the parv.k2;x2k5znyp wlua li;- d+kticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circula h7wwcjc0 x6rx1f*3-sav ran)r path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular p3rwaf*cw6hx -s j07acn x)r v1ath would have been

  At a particular instant, an electron moves e4l w*4n:c*o5klzcoiy astward at speed V in a uniform magnetic field that is directed straight downward. The magnetic4yoo5c 4 : cin*kllzw* force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwa*aq9i/1 dqaki rd as the result of a magnetic fi/a*dq 9 i1ikqaeld. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where the5: w. 4hhdwhac,hhs5mre is a uniform magnetic field in the +y dire,h m5 hhs5hwa:cw.dh4ction. 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-carryet t(7maat:-)dek8cip5c e6ping wire is

  At double the distance from a long current-carrymjvgaax9e w7(z+t4 rmn8f+;ting wire, the strength of the magnetic field produced8wm faa(ttgm+ze7 j9+;rxv n4 by that wire decreases to

  Two long parallel wires placed side-by-side on a horizf-ig;rpe7pp b)cn u227j4mhzontal 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 you7gim e- pp;2z7n4cfjub2 p )hrr 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 horizontal table carry ide gu*ywpfh8 *3tntical current straight toward you.hfyt ug p8*w*3 From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnit: e:0p usb.nnhude of the force between the wires is F. The currubh. np0::e snent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the e+ el dkqpjm0 m r1sdiw*89b*frg 2))jwast. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on th9pqg 1mdr)kwlbdjj8ew ms f*)i* +0 2re proton?

  A wire lying in the plane of the page carries a current toward the ; hynbjmnvk3 b,cuk:o +8t9 e9bottom of the page. What is the direction of the magnetic force it produces on an electron that is mo b9ob je:kuy;cm n+8h9k3nt ,vving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed siokcf1,wfy,lj 6c s6 ,wde-by-side on a horizontal table. If the wires carry currentc , , 61cffk,l6swowjy in the same direction,

  Two long parallel wires arjuall,0 q8w,,am ;1f)qwgrc ve placed side-by-side on a horizontal table. If the wires f8rjag;l ,lw, 1qmvwq0u) ,ca carry current in opposite directions,

  Consider two current-carr+bzw1eay1 + 0ishhqg- 3 r3bynying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of thgeyb q3 i nha sz1-31+bw0yr+he 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 a .dogiq.19ehrre 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 momeegi rdh9 1..oqnt of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle 7 h*qg 3jm3.e/u).qx dfjgesfbetween the loop's magf) gqxe./fj usq73 dj.he3m*gnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current 2m d 5)thhm+49m hsya3dfopz/carrying loop that is free to rotate in any direction wih)d/pm+mf3zhyt4 29s5h odmall experience a torque until its magnetic moment vector

  What fundamental fact ,hs enyz ;v8q0underlies the operation of essentially all electric motorsne;sh,08 qzvy ?

  A circular wire loop lies in a horizontal plane on a table at f 30n0y ..ga u0q ec3/bntxayx:bk.snd 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 torqucyn00.0aen y3aukstf /q .x b:bxtg3.e caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is pxcrj y4ajsx. g.s6 )8accelerated 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 thep.x8yxa 4r )jcs6g. js 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 pcy+,05yt nwdke )qd3 rwt:io 8assing 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 mod08 iwkn+ y5,rq w)t3docey:tve 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 orienteounqe6ua)(ejxe9+6 s )oni+n d parallel to a uniform magnetic field of x9nno6)6 e)(+es+ieqa uoujn
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a diy b spd(+wer54rection 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 stra ckf8se a t.t9+jipo,64gggb0-z j2tzight wire carrying 5.0 A when it is placed in j9z oi 8,ttjbp-ket0 sf . ggcz+g462aa magnetic field of 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 9i+r xj yhpf(1has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod9x1iy+f hjpr( is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unigk0r zp-msk sht q8/f.v- :ts;form magnetic field of 0.20 T. What is the magnitude of the magnsmsk8 r:s0ktt-.p ;fqhgz/ v-etic 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 speed o).(d qfaot0qb ukhpbv50p:z c.1 ohzfd.h8n2f $5.0 \times 10^4 \; m/s$ 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 n4.klb )ry7eiqrv 3u21z(e lnof $5.0 \times 10^7 \; m/s$ 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 6luo 6r-lwpf+ 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 withdx8umg )c b(vr+l.0 lu 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 a speu3pq; dg1y6q+5eqgka ,;lvlfed 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 oug1n4t4le2d+ ,beq /tzpb s d(bn/r9l 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 carrie - vqbz k97neow,c)ix1 p*l6b-s4x dchs a current of 25 A. What is the magnitude of the magnetic field at a distankz bec 1p)9bqx- vo4h c w6di*,-snlx7ce of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at h510d14d0x tvopp jae the ground, 11p415evdojp t dahx000 m away?

  How much current mus s(r 6g5;,xuwwce7rf.bodrktsbi. *;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 wkan,a 5; bfi(carrying a current of 5.0 A is the magnitude of the magnetic fiel(bfwn ;k, ia5ad 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 opposite direyakm4. prbyl+ jo5 nf2:cwk2:ctions. They are separated by 40 cm. What is the magnetic field in the plane of the wires atckl:nfyo. p br+a5m22 :jw 4ky a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 88x r :,3 j7)bgcp1g 1f0dam.yfhzfa btfcn0c20 A and 5.0 A in opposite directions.ff mnd7j 1 c80a1g .cbxzp30f 8r,cbhyf):atg The wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 2;jy:cu: xqs*7oj4 - bau+fo mz0 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 tu7:o zsjuf m :c-*+yab;4xq ojhe two wires the same?

  Four long parallel wires each carbbjfw6 o(b1 nhq 048wvry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a squarb0vjq w( 1nbfb84ow 6he of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carr)bal)x (,(4u 3yqe-ri zgk unkx08ajmy currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic forcb)8au3qeln ) ,y(- k(i4j xza0u gmxrke per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wirbo1. qdnxs r2l5.9pohe of radius 4.0 cm when a current of 2.0 A flows in2.9no.o 5d p1lhs rqxb the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic0l mg*otgli : p4hqnk)3;l0 bc field is 4lt;0oghi )qn0l* k:m 3gbplcproduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and car( un;mic7/eex -iakwel wk,,h);o41 toaosr5ries a current of 4.0 A. What strength of magnetic field will it have at its )cnoek;45-/ a hum,;71er w(oa ,ktxilsio wecenter?

  How much current must pass through a 400 t0;i9m,d gfqanrf x/ ovf/0f 0lurn coil 4.0 cm long to generate a 1.0-T magnetic f rq/0fafvdf;nilf 09m,o xg /0ield at the center?

  How many turns should a 10x3fb p 1hpoy(zj+-l/ y-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 that carri1cpq+)rq o+/k9ya 7iuzt1 z ddes 6.0 A if itkczqty+1 q/pddz 17 + uo)a9ris dimensions are 4.0 cm x 8.0 cm?

  A circular loop of w*8d(srjmt2 cv ire 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 ismsr tc*j2 dv(8 the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-s7g2/h6d oqpj zectional 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.s o 4hz0qalg( xhh6:4o5 T. The loop has an area of640h lz xho sa(h4qo:g $0.12 \; m^{2}$ 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 uniformb- quuorwh- 50 magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane ofb 0ouwh5-urq- the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetgubk f7(dzjyv (f y (.1f*zyy:ic field of 0.30 T. The current in the loop is 2.0 A. What is the magneti 1v( yy7(j(dfkguf:zb zyy. f*c torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of in02vbipu* +earea $0.25 \; m^{2}$ 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) has ail2ce+p+m rn.dw28 tzsu5; ae 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 velocity mlh6 oarsayl/:( z65c $6.9 \times 10^6 \; m/s$ 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 oi5 q*xnaj 48pm31pvidf 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting orb13*8idpxq4i 5aj pnmvit?

  A proton is accelerated fhl5+ 1q,kfrk euii+pc(1+e7w sw g ca:rom rest through 500 V. It enters a magnetic field of 0.30 T ori(gwc1ela7+s+i+hk up 5q,rk w :e c1fiented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference ofbzze6n5 pzlz/xu9z8/l6i r8 m 10 kV before entering a velocity selector. If the B-field of t ulrzzx 9z/npzmi8e85 6z b6l/he velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?