If the north poles of two bar magnets are brought close to eacyantpn19qvh 0/htw tr59:( qch other, the magnets willpv a/nht qct1 ryw9:0h(5q 9nt

  If the south pole of one bar magnet is brought near the north polmml8(nul /zz, e of a second bar magnet, the two magnez8muln m /l(,zts will

  If a bar magnet is divided i a ;:ly2-bk0buzx9ibbxdh6 m,nto two equal pieces,

  The Earth's geographic North Pole is magnetically/zohyof9t, gw o(:qbpi5*2 jg a

  The south pole of a magnet points toward the3 9je6q jzg3uj,ak 5gvg z6v)2b zz2nm Earth's

  An electric current producesm /gou7kd p/ kwc f3+ mi;p0;dhsvb4w,

  Which of the following is corr bwvr25b,x 4koect?

  A vertical wire carries a current sturbbt+b4.(d d s psd),raight down. To the east of this wire, the magnetic fielr btddspu4(, bd)s.b+d points

  A horizontal wire carries a current straight tov:gvvyqs,l z -)cku* 6ward you. From your point of view, the m) *-vqgcvylvku ,z:6s agnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewcerrm/r sb z b,.u(-5 gza7*wmed from above, the current moves around the loop in a counterclockwise senscwgrr(5*bm -ar s,.buz7e /mze. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire6m6e+6(g gce q+0 fb2 vu ftvxi7,gevl 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 th+e2q0g v 6efel 6u mx(v+f,gbgtc7iv6 e magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is t1h0qrn yo(u 2hxtl9 e)he

  1 T is equivalent tod+4-jr6 ud g5p *zpj m-kk+vbr

  The direction of the force on a current-carrying ; rh9lg/,erjkwire in a magnetic field is descrgj r kl,;e9rh/ibed by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongest whenccclybw*g /mxpv2 7n g( 89g8q

  The force on a current-carryingbyh)uy pqmsnhph7 7l4w h )np2,(m*5y wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the mapymee7: ze4 n.kl4es( gnetic field vector points due north. What is the direction of the resultin:s mlpeye4( zn. ek7e4g force on this current?

  A charged particle monl k2oz6wm. h0;y0crpves and experiences no magnetic force. From this we can conclude t02lc ymk.wnh ;0zor6phat

  A charged particle moves with a constant speed through a region where a uniform56z xdgs2fur* 68z-yg087iefg pafun magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle6 u0s *i e78axfgg d-6frg uypnf85zz2 moves

  A charged particle moves across a constant magnetic field. The magnetic force o2lit*y8g1 mjs n th 1sg im8ly2*tjis particle

  A charged particle is injected into a uniform magnetic field la4 kwo01(lwhsuch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, th 0lw k(4aol1whe particle will

  A charged particle is observed traveling in a circular path in a uni-qfrs2p7 vmt )5t+,knu gqo 8iform magnetic field. If the particle had been traveling twice as fa)p8k sg +tv7,mnr 2otu-i fq5qst, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in aulpvigt* 6 ie( 1m+6ji uniform magnetic field. If instead the particle carried a charge of +2e,li6vejg pi (t 61*i+mu the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed zqel.3tqh- o7V in a uniform magnetic field that is directed straight down7qhtq3 . oe-zlward. The magnetic force that acts on it is

  An electron has an initial vf0pri8 y6ez5owto 2h5 . zn5nuelocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnezthn oi08yz .w ou625p55nrf etic field is

  An electron moving along the +x axis en2)s;5q72b bx wvqfr-otb d et 98 0s9uq/hnvroters a region where there is a uniform magnetic field in the +y direcfq8 5ve7rs-uwhors2tdt09;vxbq/ ) b2 9qbno tion. 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 shagtu)059cca-ho1 59ndws/p: j ngl by a long straight current-carrying wire is

  At double the distance from a long current-carrying2ao gl(q5 ,arclzq17o wire, the strength of the magneozr (175lcaqoq g,l2 atic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tje(.hqf6 /y qmable 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 viewej (qy6q fhm./, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tqn1xh8t8dv z;1 c, 4xjt vf-fwable carry identical current straight toward you.qf-w t8nxx hc d1jz1vv,4; 8ft From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. T hd3gpg -zr5f2he magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of g5hr2zg-pf3 dthe new force between the two wires?

  A long straight wire carries current 4m0/d 2d-g7mrssr. f0l ynp6qoy t3bwtoward the east. A proton moves toward the east alongside and just yyftgmbqd34 .wp0s n2mlso 07 rr/6-dsouth of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the pagehw.j c 4lfu)2-f)u9dz .n(x.dwdji dr 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 thc.l x. ))urw4fd ud9 .wjh 2d-fjiz(nde page, from your right?

  Two long parallel wires are placed side-by-side on a horizontalfutd,v j(u,2 ;o/q yrs table. If the wires carry current in the same dirutuq /dsf;2r ,v,oyj(ection,

  Two long parallel wires are placed side-by-side on a horizontal table. If the0e 3nuhpgm7 gr(,6p khz/ke 8g wires car gur, p 3(ge e0zh8/mkp7kgnh6ry current in opposite directions,

  Consider two current-carrying circular loops. Both are made froyq-9t)-qjf h:3d ovhhgl:guhp9 zu7, m one 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 center of the smaller loop, the muyfpzj9,h9hdl:vh g-ho7) tq3gu- q:agnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are mad5t *7e; 2b njkhi7qloq;fsv k8e 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 of tht5fi8 leko qn ;7vq2kb*;sj7h e smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs w5)0u frmieeqi;j:3 vmhen the angle between the loop's magnetic mqe0)5j u e:vfrmi 3im;oment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is y-1opid tp;ev0 c8b zii0)0f vfree to rotate in any direction will experience a torque until its mvo 0v-zbit) 8c 1p;pe 0iid0yfagnetic moment vector

  What fundamental fact underlies the operation of essentiallyh(+6cl *2mgzsq cioc5a k7b,s all electric motorssq*c, ch( +s2ga 57ikzb6lmco?

  A circular wire loop lies in a horizontal plane on a table and carries currentuxy; i3qm-bg3+gg la/ 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 torque caused by the currents inter- a3mu+xg/qbig;3y lgaction with the magnetic field?

  In a mass spectrometer a particle of mass m and cha ,u*h5e qbfh6vrge 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 magnetic field is uniform and oriented perpendicular to the velocity ov f5beh*uqh, 6f 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 through crossedj a5mr b..+eci:3awio 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 directior35 i..a :+oicwjmeabn should the electric field point?

  A 2.0-m wire carrying a cur10 l2y*41z ,jijwlzf/jcazj qrent of 0.60 A is oriented parallel to a uniform magnetic fi* 2jl zilzf0j 1,j4wyqa z/j1celd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A i4i;tm*v 3 g4 oyilnoc7n 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 straigmo7 aak.-9dgz6adycg*nt;5 p 6 6 d dmq2alhx3ht wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makesyodtan65 g a 62 *mc hp9.6gd-m;kladx3dqa7z 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 a magnetic l9a 4c;w 7jvlqj/ntf3field of 0.10 T. What minimumja;4tc 3n /jwl 9lqfv7 current 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 field of 0-3ttmff q,q 0i.20 T. What is the magnitude of the magneti f-m qftq,0t3ic 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 wiqbz9 *oa6,( vbh.bumuth 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 speei)m;hblv em1 ,d 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 o;ortg y8 .u.jdue 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 gmj ll s)c;(d,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 speec i et:sucm,fq6vx22 0d 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 oo)csa;v7 ym ag9:jf 5cf $3.0 \times 10^6 \; m/s$ 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 current of 25 A. What is the magnitu, i6 (.ubbgery2st ,hwde of the magnetic fw,i,erbs 2u6bht( gy. ield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whavqu;;s du a:styofli4l*56 )hbq((ja t magnetic field at the ground, 10 m away;olfa5j(d ;i* hs)6b au( :sltuqyqv4 ?

  How much current must pw7zz :o(xpv2ge3qv3 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 current of sp2w3ovsp/ i4v)a,u6 fko v/d 5.0 A is the magnitude of the magnetic field due to the wire equal to,o2ks3puv v 4wi/ao)p/ fvs6d the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires car xo i qot),k,ervkd m*t d7e0+m/,uv7mry 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 wire+v / 0qt*k7m7evome x,k)md,ioutdr, and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in o t8-egk79ql3il3 ov6foywgf)c (n:n ipposite directions. The wiresvoi3 l789okf)cgi:yn3lt6gnf (q - we 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 directions1w nif+a 2ju;7oek r/m. The wirk7rof+ai21je umn;w / es 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 edahig*/3h r psn2. 7l8pxtt.pa -henuwz8p.6ach 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 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the otherg2ri.lz.nhtps w6n*-8huea3pp 8 .dp/7taxh wires?

  Two long parallel wires carry currentso .kmbpm,kxn;5ve 4,y7kkw .b of 5.0 A and 8.0 A in the opposite direction. wk45y ov.mm,,bke7.;b kx p nkThe wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at thu 8ljuc17 :gn0j/ tujte center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A ucjtgu781u/0 jt:j lnflows in the wire?

  A solenoid 20 cm long is wound with 5000 xk)i:z9d n0hj-a- wfiturns of wire. What magnetic field is produced at the center of tfi xhzd 9i:ak- -)0jnwhe solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m (wqr)nkot2 nlh 71;ralong and carries a current of 4.0 A. What strength of magnetic field will it have at q72)thlar ; wnn 1(kroits center?

  How much current must pa3 wjtxy+p;pq*dzt(r *ss through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic d+xytqp; (tjpr * 3*zwfield at the center?

  How many turns should a 10-cm long solenoid have if it is to geeeqgv;z1fdtl4:1 iv+ 3qi9 prnerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular l51wig,y0 f; f3rvco v(zs:ntioop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 5 3wfi;zcvy 0:rs(vn,tg ifo18.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform mah5c:chlcw ezaw4 9zvp l8 1n 1na7e32ignetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plp h85c1 v a3c:n4l2wz1 e ei79awnhzclane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crosscf 34kyhgqipei9 bcq18e* y4(-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 magnetv2ua 71 qrcxm7ic field of 3.5 T. The loop has an ar m2uc1vx7raq7ea 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 isdi/k9dv /utbtj-na to9u8wqg3 f7.o 0 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 the7-ka8 fouijto/b tg9 u nv/.dd0 3wt9q loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magneticzri , .ply7z8z field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when t.iz7z,l 8py zrhe plane of the loop is parallel to the magnetic field?

  A circular wire loop of arear u.ns8ket7pfz,e:1e $0.25 \; m^{2}$ 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 particl z*n;ta/a+rtz h vfbsv-4nz* 9e (charge e) 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 velo:nc dhcgt ku9fn6)4 wk.8md/ ocity $6.9 \times 10^6 \; m/s$ 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 +igt-17rf0f gt v yc2avs: t9c1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius f0 yitf vgtc79s1vg+ta-2c :rof the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magq11vfi2b er -n7q+ut3qe j;glnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the f112jreq+;-nq eg3bq7vilutpath it follows.

  A beam of electrons is accelerated through a potentiaz hh7d0drpzh+ k74wj8kq z4,z l difference of 10 kV before entering a velocity selector. If the B-field of the velocitykd 7dz k h407rzqhz,w84z+pjh selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?