If the north poles of two bar magnet2u7l2bexd1kk vr 8 m1k*w hn0ys are brought close to each other, the magnets wi v*2 w1 7b2hmdkure80xkn1y klll

  If the south pole of one bar magnet is brought near the north pole of a seconb ,fjk ,vp3.h jdi1er:d bar magnet, tvbp 3jrk:1 jf i,ehd.,he two magnets will

  If a bar magnet is divided into two equal piecet y ma:vl3-pu(s,

  The Earth's geographic North Pole is 3rsk 3kg .;glaai74swmagnetically a

  The south pole of a magnet points tow/3a(x/fqy rvkki; 4fmard the Earth's

  An electric current po,rknof /ya8j8x sk5e8fwd) 6roduces

  Which of the followiivaze4u sp8*b8b2kya nu h;1:ng is correct?

  A vertical wire carries a current straight down. To the east of 5d+k krf-f.b )1mkfhoh5utle78 y+jsthis wire, the mageklsrhj .byofff5)k -h+7ku +m81t5dnetic field points

  A horizontal wire carries a current straight toward you. From y*u/lysx4 :ea.zya c q0our point of view, the magnetic field caused z as4 xya.:que *l0y/cby this current

  A current carrying lora)4 o)4k c-nxsw91n- urvcahop of wire lies flat on a table top. When viewed from above, the current moves around the loop i r)nxs9 4-auc4who nckrv)1a -n 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 t+gix4k 0(gwpof 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 caui4kp +tg(g 0xwsed by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is wft 7 ap-t9;jppxpp-9 the

  1 T is equivalent to)7 a/gu0o y63b+mxh glrl .nco

  The direction of the force on a current-carrying wire in a maq / a -2tydlp.g2 t)/dfjq,naxgnetic field is described by which of the followinlq2axp . jg,y tq-t/nf)/d2 dag?

  The force on a current-carrying wire in a magnt/) ux m 0uy*jopuc2qwkm -p34etic field is the strongest when

  The force on a current-carrying wir ,od4hax8n e)ne in a magnetic field is equal to zero when

  A vertical wire carries a current stra8a uf6 :ypcz5s+citzv.)q b5m ight up in a region where the magnetic field vector points due north. What is the direction of the resulting fz+qzi5ubmsa 5tcc6f: .8 yp)vorce on this current?

  A charged particle moves and experiences no magnetic force. From*9gpfx9 n*r im this we can concl9n *xmr*p9ig fude that

  A charged particle moves with a constant speed81j /2 f )idhj7blqnfk through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this/)2nbfi7 k djhf1lq8j particle will be maximum when the particle moves

  A charged particle moves across a constant dqdo;z5cc )vw +vr9t.;g vn2t magnetic field. The magnetic force on5g ;nvqc;z+)d2 rdw .vt o9vct this particle

  A charged particle is injected into a uniform magnetic field such tha( 54ukdmpq+ cju q/rbjr 6k/k*t its velocity vector is perpendicular to the magnetic field vector. Igdpkb/*(jk5+ /ur64kcq rjqu mnoring the particle's weight, the particle will

  A charged particle is)6x es1sn6wjz observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular p61)s ejxs zwn6ath would be

  A particle carrying a charge of +e travelsiha akr/sot ::348tmu in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular pathmour:taki h83sa/: t 4 would have been

  At a particular instant, an electron moves eastward at speed V in a uniform magwl ez.biw. qgo,yyy-4 ag8/ 7znetic field that is directed straight downward. The magnetic force that acts qzb,7 4ga yyo/8y-ewl.z.wig on it is

  An electron has an initial velocity to uf0m- p)ix0kkn.*ctxs o -le5 the south but is observed to curve upward as the result of i50t-skk.np 0xfce-)xou*ml a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where)4oq8xaag l.g 0 p4lw9:h -.qegil bqe there is a uniform magnetic field in the +y d)9qi . oh.eq q-lg4a 0ga4lwepg:lbx8irection. 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-carrying wire i ftegz63a3k;ds

  At double the distance from a long current-carryta g nnexop.8*r4u(6 xing wire, the strength of the magnetic field produced by that wire decreases t.p rg* ea(nu4 68xntoxo

  Two long parallel wires places , jjqd8sz2,)wadi0 c9zuu7e d side-by-side 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 exactlz iwz sua09d)j 2,,useqd8c7j y midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tanj(ta/06/ azl gqwf0dble carry identical q fdt zwnl0a0(g/a6/j current straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currw6tk5 zt68i8dd bdax6ents. The magnitude of the force between the wires is F. The current in each wir 5 idb66zka8xdw6ttd8 e is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton movehlmtm5x6: t (e+ vrua9 :/vnwcs toward the east alongside and just south of the wire. What is the direction of the force on the prot5ev9wvlmt:m / hcu: at6nr+x(on?

  A wire lying in the plane of the page carri cvh,mx( /dh.uh- gl5yes a current toward the bottom of the page. What is the direction of the magnetic ,hvy c(.-hd g/ 5umlxhforce 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 otocy8n *):o,j wdxv5lq11fydn a horizontal table. If the wires caoq ,dnxj) 51* t:1dflvwyyc o8rry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizonzt*g cp 4 m,90gkkkv,j cvj+8xtal table. If the wires carry current i,jcg0 kxt4v zkmp*8 vcg9j+,kn opposite directions,

  Consider two current-carrying circular loops. Both are made from one sprms*zvolj,o7 ;sa-0 .a-ye wtrand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic fieldlw0y; jves m-a *sr-p7z .o,oa at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Bbjg96s x9f-+6 ntah dsoth are made from one strand of wire and both carry the same current, but one has twice the rb 9s6+9-hsad6f xjtgnadius 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 occudu:u+r gtju c4 jha7-h*h( kn)rs when the angle between the loop's mjr ht+:cdnh)kh4 uu(j7 ug *a-agnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a curr.z-rc8c nem/bqhljqd82 ) 8nvent carrying loop that is free to rotate in any direction will experience a tlr/)ndqvcb8 ez2mh8qj c 8- n.orque until its magnetic moment vector

  What fundamental fact underlies the dry9f c n9s5m1ic9b)o operation of essentially all electric motors? 9i9n9)ob1 cmycdrf5 s

  A circular wire loop lies in a horizontal plane on a table and carriwm8+ 68fvv );iarrswu es current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north as+8m8 6v)fiwav rrw ;und 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 mass m and charge q is accelerao6 l6b 8dqb: 6lc+2tdw4 )ipmt uut+hmted 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 magnm+6ctbl dtuqbdm8+64t h6 u2 pw:l)ioetic 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 consisw frq/47xjgr3 ts of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only partix4qg/w rr7j3 fcles 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 cuw4oop+63s xfg,c 2p)tlke61ymy 4 qp grrent of 0.60 A is oriented parallel to a uniform magnetic fi1sgypw g34,xlo c+f)pe2m6 kp6 4 qoyteld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a j2/igfqlb1ygf, a -i ;f;,fprdirection 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 osy49pjeq (uktsag4+3 0 cagl4n a straight wire carrying 5.0 A when it is placed in+ esguyp q 9t403acak4(4gslj a 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 has a mass of 0.050 kg and is iao a/7a1n+vyo, i. yxgn a magnetic field of 0.10 T. What minimum current in the rod is needed in oray+ 1ani./yvoao7,g xder for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform g7wn6azf*u; s magnetic field of 0.20 T. What is the magnitude of the magnetic force o*wa67 ;zgu fnsn 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 spee falblts-+a, h5 fxktr6.z6y9d 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 tokab19w)v)ylky +3u $5.0 \times 10^7 \; m/s$ 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 wi--o4e-oktjn 8 c:fam zth 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 wit(3/ecu*r3hofj7w m es3fm/d xh 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 speed of g si bf 0y-g-hi7q9td/2 pb4rb$8.0 \times 10^6 \; m/s$ 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 bt0vuda04g gr c1kka +/3:rp1j6i nphof $3.0 \times 10^6 \; m/s$ 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 curre6xb0 pgbo761nb fb w.ant of 25 A. What is the magnitude of the magnetic field at70ba1 6bob6npbf. gwx a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whatc.rf-w/; wff8mm msu8 magnetic field at the ground, 10 m uwfmfsc-f .8r8w/ ;mm away?

  How much current musv5a lk01z ;orht 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 curren9lskm7 2qt7k1t 2dx pst of 5.0 A is the magnitude of the magnetic field due to the wire equal9 q2 mdt1kt2pkxs7 7ls 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 directions. Thr w2h*p;s+ ist fzv,o5ey 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 wt f;,ip5ovh z+rw2 ss*ire and 60 cm from the other?

  Two long parallel wires carry currexwksn x,wf8 (m0wgu2n;o2/ a ints of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fi2w8 n 2wxi(mgkw/0fu oxsn,;aeld midway between the two wires?

  Two long parallel wires carry cuww5l ds 1v:gp cqpp26,4bi;vlrrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between sdvibc p5wl 1l q2vgp p4;:6w,the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same(vq o, uj0shf( direction. They 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.( f0,uho qjv(s What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires t5dml:/ptz-,f,;mm gsz4 o 6-vssjgn wd kw 1*carry currents of 5.0 A and 8.0 A in the opposite direction. Th4wn ojzm:pgg 5t;6 -sklsz1,v,*f mdwm/s d-te wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a cin3 8xj+f)xe0dh8fe9-ik o . h4auitavrcular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the et94i hxfnaoa0huj.3+- x )8fk id8vewire?

  A solenoid 20 cm long is wound with 50)lkrl;rj), fx md3g -)gkovio4ikf;700 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flo3f-)dlij7 x;r)irfg )km4lk o ;gvko,ws?

  A solenoid with 500 turns is 0.10 m long and carries a curreo4kmc6 pmw3al* 82sb rnt of 4.0 A. What strength of mas6rb 3awocmpm*48 2k lgnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm lonigji8qvho5 kbk1rthp e 8w3fu8g(2 s(ot y)01g to generate a 1.0-T magnetic fiel gq0(vgjrk ibo8o) hfe(y2t1w 8ih8s3ukt1p5d at the center?

  How many turns should a 10-cm long solenoid have if it is to ge vl efw/r+ol/9nerate 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 c9viy ;fs1g*hbez-z; larries 6.0 A i ;z b zel1v-g*;yihfs9f its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is ih+dq l0xp2vhj(av 8 5yn 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 (ha 5pvyv+0 x 8hjd2lqloop is perpendicular to the magnetic field?

  A circular loop of wir.t,e /vs -t+fd cn-fste of 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 currentncrnqn* .+mjl3 d2-sd of 2.0 A is in a magnetic field of 3.5 T. The lo csjn.ndn-+lm2r*3qdop 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 magnetic fi5ylsol(meo6 zb., 597hzgjoag7/ w sneld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop iss(hs7geaymj o.nzgbl76/o9,o z5l 5w parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniformm 31j/e faq9 ;bd*kvam magnetic field of 0.30 T. The current in th*a1m3a;fmj/ e dvk 9qbe loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area w7 myru-ac43ok/ fd*e$0.25 \; m^{2}$ 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 p:,j6ks wpk- dspeed 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 l +tih+b mfj0+e;b9o,xtai .l $6.9 \times 10^6 \; m/s$ 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 p c(; mqod3 sn1r 9zdgyzs+*/owotential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of t+ / zo srdwnzsqg *yod31(;m9che proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enter2zs a ,)qzl ,fucif:+rs a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path ,caf+s u ),ir:lzzf2q it follows.

  A beam of electrons is accelerated throughbp5 a-h9.w7he bph,uv 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- bh huw,b7a5p9.hpve -field is required if the particles are to be undeflected?