If the north poles of two bar magnets are brought close to each othg;zg35y 3yu( j4abkbuer, the magnets guy b4b (g zujy35k3;awill

  If the south pole of one b;/uy jd)h2 r(yubo;as :lu 5iy.ru5fpar magnet is brought near the north pole of a second bar magnet, thelyyr d: ro;y i s/bpujuh52(u5ufa;). two magnets will

  If a bar magnet is divided i 99,f0ibd4v rm cm.ubznto two equal pieces,

  The Earth's geographic North Pow qu:8vvvb-9)61 x0ac0f yxv,mhs juule is magnetically a

  The south pole of a magn)83 2+b-(xneioq0poo bdlv tl*phm) zet points toward the Earth's

  An electric current a0udiuqyne2vwk/6 ,ix g7 +yj9olu20produces

  Which of the following is correeb u5j mnvi)250/7i cgv xqppi.50visct?

  A vertical wire carries a current straight down. To the east of t2 7 z7nlq69drfab*vd vhis wire, the magnetic fib26dn vafl7dv9q r*z7eld points

  A horizontal wire carries a curro3r;q(l4 ey4gxnmibd66(z dpjh+x 2 zent straight toward you. From your point of view, the magnetic field caused by this currentdroi zz3xjpnyqe ((64bgl;4mx6 +d2 h

  A current carrying loop of w8io4 q;kdnprpag20b 4ire 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 8pgb 44 kpn0rqa;d o2ifield caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat + kj2j5f3kbkdon a table top. When viewed from abo k5b2k jj3+dfkve, 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 magnetic field

  The SI unit of magnetic udh1z.lhsk8 kkle8xn.pk 9 8+field is the

  1 T is equivalent to/o k5gkc;/qp8mj tl c9

  The direction of the force on a,h-sj )*muv xh current-carrying wire in a magnetic field is describ)u,h jmv hx-*sed by which of the following?

  The force on a current-carrying wire in a l *ama+8lb u 5f41ajq7 nxcg.jmagnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero whe1zi m jcp; kveko3v1;-n

  A vertical wire carries a current straight up in a region where the magnetic bbic*gaqh1 jefb ;s d)l3s464 field vector points due north. What is the direction of the resulting forced* b cb4ljf3i4sqhaeg; s)1b 6 on this current?

  A charged particle moves and experiences no) up93db/n lfys4a)hj magnetic force. From this we can conc)hnp /sfaj3)d4 u9lbylude that

  A charged particle moves wiai6: ywncn f2sr9za55 8 oxk+tth a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on t6o s+f cwry95 iaakt8 zxn:n25his particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The nqz hv55h q9j,magnetic force on this n 9, 5hvhzq5qjparticle

  A charged particle is injected into a uniform magnetic fie i4yio-;+x* juf) kze-yxu,peld such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the pakzy,ue -+-f iu;i x)p4j*xoeyrticle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uni/ 9uw,o+xf; gti4 w6gd;covv yform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pathwowfg ;o/6iut+ ,yv;x4 gvc9d would be

  A particle carrying a charge of +e travels in a circular patexdq d q 0ub3ry154w5 ,wnzzo:u pfjdq/98,q hh in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have rody wqz,, :q5 /ebuqn3d4 x0zjw1 dupqh5f98been

  At a particular instant, an electron moves eas: rmn* (rwz6ldtward at speed V in a uniform magnetic z(6rm: d lr*wnfield that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial zi6y0j-jni3la ev2en sd* ;2avelocity to the south but is observed to curve upward as the result of a magnetic field. The directaz 20i*ijle s3dv ;jna2ne6-yion of the magnetic field is

  An electron moving along the +x axis enters i fjl-s4zuvm((gxj2(nd5 uo:*iond- a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to righ-md zno(iv4:l(5nj xfj2du-ugo(s*i t, +y up, and +z out of the page.)

  The magnetic field produced by a long straighsel-dv /zrgq+0l(/v -poe x1k t current-carrying wire is

  At double the distance from a long currdwooy/*x nfm1 j*2o( eent-carrying wire, the strength of the magnetic field produced by that wire decreaseso(m1/* oojxen wdy* f2 to

  Two long parallel wires placed side-by-side on a horizontal table carry idf (w0qh 2,ec, zghuoe2nx *b(ientical 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 exactlybhuqcn exg(,efho*z 2 ,i(02w midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tabafsj .ew7twn lp)i8m ti*tl 203i(e7 qle carry identical current straight toward you. From your point of view, mq780fe i) w3lt .ijsatl te72*i p(nwthe magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal curr s5c6(h;ze i1;fbovpfents. The magnitude of the force between the wirefec5vb(ios6f1p;;z hs is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towarc g ih+:d v45ygpl /2ftia1,nfd the east. A proton moves toward the east alongside and just south of the wire. What is the directionf2i,cf gad:15higpt vy/4l +n of the force on the proton?

  A wire lying in the plane of the page carries a current toward the *)7cykn -xppa+ zawd3 bottom of the page. What is the direction of the magnetic force it produces on an electron a nkd7-p)cz ap*+wx3y 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 hzm1a;ewt 9u*s orizontal table. If the wires carry cuswez1* a tm;9urrent in the same direction,

  Two long parallel wires a6 k9rp5rhkd w3;n/av spb+zp,u1-ryhre placed side-by-side on a horizontal table. If the wires car 5b w1,zvyhrp h9+rup6a/r-k ;dpnsk3ry current in opposite directions,

  Consider two current-carrying circularf wm:k ;;v(ll /rx(q6v g8vmhqfk05lm loops. Both are made from one strand of wire and both carry the same current, but one has twice th/ vhlkmv5(f6wg mk 8(qmf;l;0xlr qv:e radius 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 onp9j2vg u j*xij5-yy5qe strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of theqxvijy2y5j5pj- g 9*u smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle betf;n rs1xf/ e+b08ssvania aru 5;)w9tween the loop's magnetic momenrb)vtri/ anssfnw0a8 a fs x;51e+; 9ut and the magnetic field vector is

  When placed askew in a magnetic field, a currhpl5 tb.:o*m dent carrying loop that is free to rotate in any direction will experience a torque until *5.p:dlohm tbits magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric moty zk*kln+ +(funsb r2(v3g+j hors*nkbv+ u ns kl3gr hzf2yj+((+?

  A circular wire loop lies in a horizontal plane on a table and carries current ivflp0i+4, m yfme/.y kn 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 offyvmye,f lk .0i4/p+mf of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleratedp jek1q h;bu9- through a potential difference V and allowed tokq- jbh 1e;9pu 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 R.

  A velocity selector cons v8o soid61sf:ists of a charged 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, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to ths1oovi sd68f:e north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallby tqp;:mco +*9dl1h s,) r 8cv3bihjcel to a uniform magner lov+bsjqchbtd:ic)1 m3,hc; p y9*8tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 Aucc*kqt )ku q)z);k 50u/vejb 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 carryib46rbs i843( /x tqv2zlrildvng 5.0 A when it is placed in a m xd4 bi2zsr (lqbr6v8lvt4i3/agnetic 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 has a mass of 0.050 kg and is in - zg;oq t-;0c7vzfkmha magnetic field of 0.10 T. What minimum cur;- tkz0vmgc7q-fhz; orent in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fs0:18r zh qg u.na:erxield of 0.20 T. What is the magnitude of the magnetic force os:.h:reza 8ugqx1 rn 0n 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 wia;c+ sz w3t.apth 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 speed of y 0gmw;ls 0f4cwlu3d)$5.0 \times 10^7 \; m/s$ 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/eq1noq6v 7mx 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 u- wv2.1 ychdra 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 ur6h (ip rtlgq2i0/6z 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 of 7it6xywf+8j)3aomgo2oc 9 ze$3.0 \times 10^6 \; m/s$ 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 cac:9-ey6g z/c1gkev 9 zszvd7zrries a current of 25 A. What is the magnitude of the magnetic fie9ev: svc79 zz1y- dg6/czgzkeld at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the groundh2eri 1 a-)* .vbrfcyd, 10 m away?2ydif).re r*vc-h ba 1

  How much current must ;ee+ cd5f79 woxdg6 xjflow 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 is,p4m v) 1wgsn fne,vp/ the magnitude of the magnetic field due to the wire equal, /mf np)wgspe1vn,v4 to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry u,et, bn-ko78rafjtp.vo4fh + x u ;i: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 wirejeox atuivu+fn p7.k, f48ht ;o b:,-r and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directcnl)y1 qn ,gj0ions. The wires are separated by 0.20 m. What is the magnetic finngy0,) cj1qleld midway between the two wires?

  Two long parallel wire q9w)n+tb ;mtjs carry currents of 20 A and 5.0 A in opposite directions. The wires are sepat b;9tqjmn +w)rated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wiresr qqc kv5s7f 5kxqo441 each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side f 55 q1ksoq44qrcx7vk4.0 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 carry currents of 5.0wxbp* hde) /m6:hr4 rnr 3gh,n A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnb4h r,*e6 :pxghnwnr r h3d)m/etic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire oz)*1j) zw03a cksxo qcf radius 4.0 cm when a current of 2.0 A flows in txs)ac1 z0qckzo3) w *jhe wire?

  A solenoid 20 cm long is wound with 5000 turns of wire-( vodunmdo6+ . What magnetic field is produced at the center of the solenoid when a current of 10 o mdd-n(u6ov+ A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What sfm*3q(zg p7g: awbqp::q e 5cytrength of magnetic field will gze37 cw*pfa5q p:q::( mg ybqit have at its center?

  How much current must pass throughwemi 7twkr +-/ a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at th/7-imk ww+ etre center?

  How many turns should a 10-cm long solenoid have if it is to (8b9g9jn 7fo5lfwbf jgenerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momp9xl80:/pdi nfnw 0r kent of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 08nwldx/r kin0fpp9: cm x 8.0 cm?

  A circular loop of wire -u yw*0v3ws dyof 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 magnetic torque when the plane of the loop is perpendicul *u0 sdwvy3y-war to the magnetic field?

  A circular loop of wire of cross-sec:x5ceiwmn. +h tional 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 field3hdo0 erxp3znhc+(d;*tc 5jgloe c -6 of 3.5 T. The loop has an arhxd6c oz 3pg-(hr cnd0l cot;ej+3*5 eea 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 field of 0.30 q :fzt+/1e /iru f1up28oqtcn T. The current in the loop is 2.0 A. What is the magnetic torque when the plane ofe:2pqztc1+rtfnou/ / i1u8q f the loop is parallel to the magnetic field?

  A circular loop of wi7el *h3bzbf oxu( )xf.re 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 is the x7ox u)lbzhb(*f3ef .magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area + ji ux6 1)sxjzboxc12jhhpl/-ee 6/ewc8z0 l$0.25 \; m^{2}$ 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 a mhm9d0f(2z :n+0 qrsya m rnq9speed 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 ion6:kif6 jcum 4h q6lm,m with 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 1.08) si d5r94glpgh x3bg kV and then moves into a magnetic field of 0.040 T. What is the radius of the pr8hgd gxbrps4 95gl)3i oton's resulting orbit?

  A proton is accelerated from rest through 500 V. /axk6jm/jb9* c((zjzcr 9kf t It enters a magnetic field of 0.30 T oriented fzc6kx (9 (*9 /kabzjmj tjc/rperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference o,v4eh j0q(zxo/pgmt , q57n/cjuq6 vof 10 kV before entering a velocity selector. If the B-field of the velocity selector has4qjjoq5tvcnz0/6,vm( 7 q p,hux e g/o a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?