If the north poles of two bar magnets are brought close to each othe lwdyp0w ;;d2sr, the magnets p 2wwdl0y ;d;swill

  If the south pole of one bar magnet isqwqw:h rpz2i* :g/) kd brought near the north pole of a second bar magnet, the rikqw /)zw:g:*d2phq two magnets will

  If a bar magnet is divided into twosz- 8jze -am1wqq94 :p*usv askkn2 ;o equal pieces,

  The Earth's geographic North Pole ic z0a11 ssqets;ec l(;rqm (bm1rnc20s magnetically a

  The south pole of a magnet points tm7x cju-g19 xaoward the Earth's

  An electric current pro++ 7f+fod44qj rhzs; p j.bmhkduces

  Which of the following is correct?o (v1ufuo)w,(8cl 4js0uyz nw

  A vertical wire carries a current straight down. p9jx f h*5,..0 yldjjtkj t2aw To the east of this wire, the m fdp jl.j.t2,5ywk9j txa 0hj*agnetic field points

  A horizontal wire carries a current straight toward you. From your point of viens,51(lyab bdw, the magnetic field caused by this cubl n, (a1yb5dsrrent

  A current carrying loop of wire lies flat on a table to v0jv*m b7z;lw zw,g3op. 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 the ,3wwg7bzm z;0l* ovv jloop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top1- zxy2uamqfg6y6t c4 . When viewed from above, the current moves around the loop in a counterclockwise sense. What is t 2af qtx-gyzy46umc 16he direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fieleecu9u+g0 t28w5lncxiha q/ 2d is the

  1 T is equivalent to c:0vhl).b)1oq, 0tdih uigxn

  The direction of the force on a current-carrying wire in56n xahh xwsaf0z 0p3, a magnetic field is described zxh5anp s wf, 036x0haby which of the following?

  The force on a current-carrying3rlut hu:3f o67pi6 ad wire in a magnetic field is the strongest when

  The force on a curre 5 q5cj+r)byaont-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic fwu v exgo5 da.jg8)*l4t83uenield vector points due north. What is the direction of the resulting fo)85lv oeuu wd xan3gjtg4.8*erce on this current?

  A charged particle moves and experiences no magnetic force. From this we can bn.q .jg z8 e8-v ).t6lfcshcaconclude-a8c te g...s 8bfcv6qhl )njz that

  A charged particle moves with a cr1.bu 72h:x xzwi *ogronstant speed through 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 tb:*rz.o1 hrx xg u2w7ihe particle moves

  A charged particle moves across a constant magnetic field.kwqzys hxg4w,.7./ pe The magnetic force onx 4gsy wh/zq. kp7e.w, this particle

  A charged particle is injected into a uniform magnetic field such that wro +kkz6.oo7 its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, thekow .o 7r+o6zk particle will

  A charged particle is observed tra h p;d,nw3 miri r4)ovsd6nz6+veling in a circular path in a uniform magnetic field. If the particle had beed r3vi6z wirnomh) pd6s+n,;4n traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a unwqrda2g127b hvo5jq - pi2b l-iform magnetic field. If instead the particle carried a char- l2j- d2oir7bb2 5qw1qapgvh ge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at spv8*qge6 +qhokeed V in a uniform magnetic field that is directed strg6k8q+qhv e*o aight downward. The magnetic force that acts on it is

  An electron has an initial velocity tf uf*ry 96m toj8oz5o*4zcf)o o the south but is observed to curve upward as the result of a magnetic field. The direction of * oyuf8m 54t*fr fo)96zcjooz the magnetic field is

  An electron moving along the +x axis enters a regzo fa*6 s13dlz dw;z0wmx8xx- ion where there is a uniform magnetic field in the +y direction. What is the dzzx; zwo mdxld* xw- s016f83airection 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 v+ n 4e0,m.aqif*j 6qw-sgbm tis

  At double the distance fromg.. 9 3cg:dniq sxfw8r a long current-carrying wire, the strength of the magnetic field produced by that wire decrease8 is9gf..:cr3gndqw x s to

  Two long parallel wires placed side-by-side on a horizontal table carry identica fg7m8b, vkwh8l size currents in opposite directions. The wire on your right carries current toward b kh8w,m gv8f7you, and the wire on your left carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wir5e:7s4 eahnkbb d5avoz 2r:oyqu6 j60 es placed side-by-side on a horizontal table carry identical z :do5k4hra uvqbenj: y5se7o6602ba 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 curru3vq) prdx+b8jnlj jv;.l2ag 6rqa1 -ents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What ix;-l+qu l8q jar6japd3v jv. rng1 b2)s the magnitude of the new force between the two wires?

  A long straight wire carr-o vcl..zyp6b ies current toward the east. A proton moves toward the east alongsid.bo .v l6-yzpce and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of thezjel2kqx f9qg0(lw 4vu+3 l0i page. What is the direction of the magnetic force it produces on an e0l0+4 qvlj(2eqgzuli9x3 k f wlectron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are puas1+/9ca)nb8q6jw ssp-p d nlaced side-by-side on a horizontal table. If the wires carry current s u +n)-wsqna/89 6cd pa1sbpjin the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the w +/dzzv0svp+wbe 8( qq;g/g5p hs 1z.dj yuoz6ires carry cd q s6ezqw(odg upb0y /.hvz8s+z;5zgvp +j/1urrent in opposite directions,

  Consider two current-carrying circular loops. Both are m1cftr b1+c zr7ade from one strand of wire and both carry the same current, but one has twice the racc1r 17rz+btfdius 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. v 5m9ddxm5z r*Both 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 magnet5v*r9m 5dmxdz ic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the a kp.li: jq7sz-rgl6b 7ngle between the loop's magnetic moment and the magnetic field v7rk:bps.zq7jl l6 -g iector is

  When placed askew in a magnetic field, a current carrying loop that is free to14a1rar xu+ky2aip1k5 xd0u s9 b czg2 rotat2daca9a 0ukig x 11+x4pruzbs 5y2rk1e in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentiallc*i yr m*l+/ fdw n yn1j5g-e1jq9n+kx68grbvy all electric motors gl+icnyndx g j1*b k6*jr- y1f9r8w5e/+mqv n?

  A circular wire loop lies in a horizontal plane on a table r4i0(gkf0h 6k fwa2hdand 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 tor a hh6i kkr4ff0gw(2d0que caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throo g q(ki 0f.ckf/y2ab,evzcl(o-.9d cugh a potential difference o2fzl gqekcck0byi o-. d.9v(fa( c,/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 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 passing throub8s tu+(sn5rr gh 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 the north. What direction should the electrir8r (subns5 t+c field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parc uy4ni-a.uhdw rf8; .allel to a uniform magnetic fiah yrn.i8.wud 4uc-f ;eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10zfz8+w9 n d4ws 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 straight wire carrying 5.u2f12+:gy* ih+l5nyn clrur e0 A when it is placed in a magnetic fieein1 r*2ly ulfgrny hu:52++cld 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 kg2m js- e49iylo;k yj1l and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for oli 4kj-;ey 1yms2jl9the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic e:go v4gws(6xfield of 0.20 T. What is the magnitude of the magnetic o6wvx (:gg4esforce 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 withtt ju 3k+2y(eh 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 spr+rzu- 6hp/rvc*(r(j gv2th 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 due noryww:+iq/w 5p8 n5zcnn:.*k( ehlmjdnth 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 speg 4stg6- 5jqgbed 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 wit x sr)4t uf1g+k.-xb )wtw4cobh 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 acceleration of the electron.

  A proton has a speed g es ehe5zq /.p-h3n6nof $3.0 \times 10^6 \; m/s$ 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 c1c(hso ksrf9+hkd3,u1(2f/ i xkyi j carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.1k i9 1/yc is2srfxok cj1((d+fk,uhh35 m from the wire?

  A high power line carrying 1000 A ge:. d7fyfo885dmzfca anerates what magnetic field at the ground, 10 m m8aza7of5:y fd df.8caway?

  How much current must flow ldc :8:h h7+ wegn9upifor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a+gy4r5 enir fg2d73b mc2uz+o current of 5.0 A is the magnitude of the magnetic field due to the edr73r+n f54 mz icgyob+22guwire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wire1.cx z5g hqtbm (/gb+pp0m6g gs carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic g.bqz0m1gxt5+ cb(h/6mg ppg 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 w.k /7r uq3ge 9r5wiukcarry currents of 20 A and 5.0 A in opposite directions. The wu. /rg5kw9i3 eu r7kqwires 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 in opposite dirlv q m)r9hfqdkyl/o-y3 izf4r 88:zc4ections. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wi h q3imkf:89y8)rld-z 4cr4 /qflo zyvres the same?

  Four long parallel wires each carry 2.0 A in the s0 ,5t1vo+icztjb8e) /j cfzhvame direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positihc t10zvvjj,tb ofz)/8e +5ci oned 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 5.0 A and 8.0 A in the opposite 1o(o5q: v2(mypo zwezdirection. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wizoomvz q(e5y2ow1 p(: res.

  What is the magnetic field at the cent*veqh;,j 1xvfc b60p( 0anqo46nosbfer of a circular loop of wire of radius 4.0 cm when a current oxq0f bcno; 6v4bn1j0pv *s fqa6 e,h(of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound withueo(z1c(d e ;r 5000 turns of wire. What magnetic field is produced at t( zu(;1rd eecohe center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and capa3; bc.xdvf 0rries a current of 4.0 A. What strength of magnetic field will it hav0b.f; 3axcv pde at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to geng3uwo++ /a ytrgu/fk2l8vb f0erate a 1.0-T ma+ 8ywb2ftvgr/uo l/ +a03gfukgnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to genera8 :oc :+ur;amky2ipfdte a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular l(8./sp ads:hehy4 koaoop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 csa y :(4k s/.hepadho8m?

  A circular loop of wire of radi(:yx-pan yt:v71bs-qs * nqszus 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 plsq- ssyb*a nnv-z:q1pxt (7:yane of the loop is perpendicular to the magnetic field?

  A circular loop of wire uvzq1 6bm;qu:;7 bfz0tv9rce 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 current of 2.0 A is in wvfji4yexn4kt k0 t::k/ odu6/h0 hr9a magnetic field of 3.5 T. The loop has aho:0i/nhx :6r k/ kej ku ytw440fdtv9n 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 ishar1 uq 5ugpy01on -ii-q7ss7 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 plan7hspq-5 i ar7si-o 1yn1qugu0 e of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a univ); 6 -pci,j ;nwdzlv7 d(rpdzform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane oz vln6r) z;p(v;,d 7pwddj-cif the loop is parallel to the magnetic field?

  A circular wire loop of area /1 ec x+bzntp8$0.25 \; m^{2}$ 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 srs6r f0ks-ob7g r3zt0 peed 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 18pi1w/i +p kqr a0wghwith 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 8hw3s8xd zh8aa potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resuswh8d xz83 ha8lting orbit?

  A proton is accelerated from rest through v8cwf 8 tfunkw-:,;l cs;.ma b500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. :-a8; nf8t , .lfcwbk;vmcwsu Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differen7z m/m 5 vjb9u.n-kehtce of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, /mvbhez7t 5j. -k9mnuwhat value of the E-field is required if the particles are to be undeflected?