If the north poles of two bar magnetsf/xmgr3; q9f)c, iz;yafc5 lq are brought close to each other, the magnets c /; ga5i)3f;,qmc9yzffq rl xwill

  If the south pole of one bar magne fiduljn3 .bj6y9(j 46bj2z fow;4nat t is brought near the north pole of a second bar mlz 6 n4 uofyj9jji3t(2wbd.bj4a6 ;n fagnet, the two magnets will

  If a bar magnet is divided into two equal piecesh)eb8p.so 0j 9fii8 kl,

  The Earth's geographic North Pole is mago3(jna lfi/x (netically a

  The south pole of a magnet points towar4sf0oj)8jj mmbus; ( f8g) nvbd the Earth's

  An electric current fk4i(jg 82rr /dq x7clproduces

  Which of the following iscn* i g)1ayt9x9cdrn+ correct?

  A vertical wire carries a current straight down. To the east of this wire, the mu-bm gy4lb /rst(lr9s*0019ox k njnmagnetic field pr-on 1j9l g/ns*kx ub4m90b0ylmr(tsoints

  A horizontal wire carries a cul)jwzxzp(4i0 rrent straight toward you. From your point of view, the magnetic fi z4z (xjp0iw)leld caused by this current

  A current carrying loop of wire lies flat on a7 iw5dbt:7ozht o/rc ptt-*,a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What /tori7 cb :-t7odza5 tp*hwt,is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loopkgys9*k+- , x vsk6)jy7 hqwyu of 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 causxjsw , 7gy6k*y)vyhuqk9+ k-sed by this current, inside the loop? The magnetic field

  The SI unit of magnetic field 8/wpdhs 4moq gyq )-0ngu)u8cis the

  1 T is equivalent to(eetg:wwd v (;

  The direction of the force on a currenth w4(5(ufunz.bbf ag0-carrying wire in a magnetic field is described by which of the followuwf(zh nab b.u0 4f(5ging?

  The force on a current-carrying wire in a mag 9ak/uzxn+ rm5oh5tu6netic field is the strongest when

  The force on a current-carrying wire in a magneti:0o*jys w8l/p:pfmk a yp1 k3tc field is equal to zero when

  A vertical wire carries a culr.l buye4l2/ rrent straight up in a region where the magnetic field vector points due north. What is the directlryu/2bel .4l ion of the resulting force on this current?

  A charged particle moves and experiences no magnetic for+(ep63;x9yboc; j ykdtx(cunajx 4a :ce. From this we can conclud3tdxk9 axxu(4+;c; eco np:(6y jj yabe that

  A charged particle moves with a constant speed through a region )jtr +t-3:gl w cz gldc:s;5zu;me6l bwhere a uniform masc ; :tlt jbzzc :lw5r63eg+;ml)-udggnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a , xsssr /1 h.vz5r x)u6by1go4cxd3 jfconstant magnetic field. The magnetic force on1)r .g xbsfs3yc dz1x45h ,6uxsovjr/ this particle

  A charged particle is injected into a uni0mfpu;8mk,d z form magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ig 8dkpmuf0;,m znoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular eno. *fo9t0k.kj vq; cpath in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wo 0tfq. jcvnk9k .oe*o;uld be

  A particle carrying a charge of +e tr )c.99qbkd vbravels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circ.vdb9 9r) bcqkular path would have been

  At a particular instant, an electron moves eastward at speed V in wfw g61c cpt3;a uniform magnetic fip3gfc w;t c1w6eld that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obse,; trmyk k*g1fl rmk*+rved to curve upward as y r+fkl*;rm ,kkg*mt1the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regh1tp:0pz px+ep l ;zzm1th q78ion where there is a uniform magnetic field in the +y direction. What is the directioptz:mz7et z 1hp1p;phxl08+q n of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by co63 td:a55k iwv:fyt a long straight current-carrying wire is

  At double the distance from a long currenk(r em+; r(xqlpt b,m9;,hvttt-carrying wire, the strength of the magnetict tm9 ,b,m+hrq l ekxrtv(p(;; field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry idenbe 1wous hjlif)w 0-mt5k/;s*tical 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 poinf sbmw1teo5-0* hlis u wjk/);t of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wiresp.5kni1sdrwq8d ly ,09pngpf. sw,u2 placed side-by-side on a horizontal table carry identical cu0pr1lk . p , dgiyufn 9.w2nw5s8pq,dsrrent 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 current ;7n *1vd8,4yhvft+ryfa smdhs. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitudevt*fdr417h, va 8m;fy+shy nd of the new force between the two wires?

  A long straight wire carries current toward the eas9 ebqms0v5vq*d p1wfi 8lt jp7)q 8;vbt. A proton moves toward the east alongside and just south of the wire. What is the direction of the force ot8j7 p0 fbq1we) pq 5 vvb*iqld8s9;vmn the proton?

  A wire lying in the plane of the pageu364 zndm v :afg4jor, carries a current toward the bottom of the page. Wh o :4ga64 rmnjzuvdf,3at is the direction of the magnetic force 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-byz- -vqy) cpq-c-side on a horizontal table. If the wires carry currec czp-)-qyq v-nt in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tablesu , to:1o76b nbwv1mk. If the wires carry current in stu1 b ,oon61:m7wbvkopposite directions,

  Consider two current-carrying circular 1wz)z*jhq 2hm 15es jrloops. 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 magnetic field at the center of the smaller loop, the magnetic field at hs1hm21 )qje z5 zwjr*the center of the larger loop is

  Consider two current-carrying cohw+hnnl( ums7: 7zdo:x0 ,aiircular loops. Both are made from one strand of wire and both carry the same current, but one has twiceou7z0l: dhnw nsx7hmi +:, ao( the radius 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 occurs when asbcq4rikm p614df k 1n9n07l the angle between the loop's magnetic moment and the magnetic field vect0nb ak4fqd 7l4pis 161ck9mrnor is

  When placed askew in a magnetic field, a cc/6dd/oglw1 u urrent carrying loop that is free to rotatl cddo/1/uw6ge in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlie0x t my/ivva ;zm1,fvo6r;o8n s the operation of essentially all electric motors mvon fm 1z, vt08yroavi6;/;x?

  A circular wire loop lies in a horizontal plane on a table and carrw* qxlp4t 2m06g 0di7 mvnu5tkies current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips belowu m*t5ditknpv64 w0xmq2lg7 0 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 partica2- o7k h-bx0 qjoc98)uvugyhle of mass m and charge q is accelerated through a poten-9)2oc x gbaj -oh7u vq80hykutial 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 of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector cq7./bd mskry,95ycq lonsists 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 kcmb s 57.lq9y/d,qyrselector, 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 currp ;:iiqxqyjt4yw5(:m (uq u k9ent of 0.60 A is oriented parallel to a uniform magnetic fiel 4i(:jyt5qkqw :xy;pq 9(umuid of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr xjfm1(d ,e.b:jsv 8icent of 10 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 5.0 A when ih27 qqumu /-vo)9qi rvt is placed in a magnetic field of 0.020 T? The wire -qqu9hr7)v/uo vqim2makes 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 1vcx0h z4n+fjm0y0em and is in a magnetic field of 0.10 T. What minimum cjc ey0 v+4h 1m0fxm0znurrent 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 0.20 T.a0n6p8 kdx7cw What is the magnitude of the m6a0dxc n kw78pagnetic 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 spetlveel8 b*vc pb9gs3 3 7ou.3hd(v,rjaw l72ued 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 hm epxy93;-(+.a3psri q 9d7lmi p f;edqw0c qa speed 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 d xgua82oi3kybz2c- -due 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 a speed of lt 8qru d zxht8;8-/tx$8.0 \times 10^6 \; m/s$ 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 ae1a t yjfj 1+.2ql8ibt 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 ofonlw(rruo-a)i25k + 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 win;vc yydoezo ;,v0*al(8c 9a4men ni 7re carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the8cenvaoz 9nlv; 0 yom,c;7ie4*ayd( n wire?

  A high power line carrying 1000 A generates what magnetic field at thos o;ei3yp8qzea j0y b in.x:8a, fa;+e ground, 1zo ,y0exab:jn; iof+ip a88 . e3;aysq0 m away?

  How much current must flow ij2/pw3p *gc:nig:unfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long st* qnh) he:*lguraight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wign*uhhe)q:l* re 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 directi2eq)+hgt d7)wwd+lskons. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 2w+qelkgtw dh2s +d)7 )0 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppop-xo q qy8w(h2r* d7uwsite directions. The wires are separated by 0.20 m. What d2 r q(xp-q o*87ywhuwis the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 2y1nx+x/(5k sg-xgl ow0 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point blx xowng xy5k1/s-g+( etween the two wires are the contributions from the two wires the same?

  Four long parallel wiriyr /.amxd-wjv ns;.qtjf .8 ,es 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 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due toi,.v n s mdrjfy 8;t/-.w.axjq the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direz; k m5b;fp fk+9z-yjuction. The wires a z9 kfzuykf-j;bmp;5+re separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at theqlw c5u5i/efli( n+ /t center of a circular loop of wire of radius 4.0 cmf c5liwq(i/5unl+ et/ when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long p-*rygyf la6f(h-q-yis wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A(yp- gry6*h y l-f-faq flows?

  A solenoid with 500 turns is 0.10 m long and carries a current osk sz do(zzdk94v 08q+ .a;r)pghnfd;f 4.0 A. What strength of magnetickp4ak9z vdnso ; 8z.rsfdz;h+d)q(g 0 field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gejypo0o9pj( 3 qyq6d2w nerate a 1.0-T m qw3ppqj 6y yj29d(oo0agnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to gene k y 2qfa87sxdnblpa6;uk i590kc8v9 drate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a reqn2 tuvi8gkr(np1 r m)d+z62rctangular loop of 120 turns that carries 6.0 A if itsgz2 nndp+irmuk ) (1 28rtqv6r dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wiffnxzs ;13r2blvrh :4re 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 magnetic torque wh;ls1b4rv h3x:nzf rf2 en the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-seczxa 4t:x9dz /8qlr (f)dkd-uwtional 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 currentcw2;oy /yeaype..3 e0 ) 7wfrhwprpe 4 of 2.0 A is in a magnetic field of 3.5 T. The loopwhw.fr7w/ )ep;ce. yer0pa34 yy e op2 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 field of 0.30kr36 nq*k9gz5wy9on l T. The current in the loop is 2.0 A. Whk3kn9gr 6*l9q n5 wozyat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius br p+h468c-xpf9 cplz0.50 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 parallel to the magnetf4 8b6cxz l+9hpppcr- ic field?

  A circular wire loop of a :b2gx 0iap8.ltbkl,area $0.25 \; m^{2}$ 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/zvus3pt9 a ;v particle (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 velocity qul *6c 4ew+e r1or7db$6.9 \times 10^6 \; m/s$ 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 1.0 kV and t, 3dp(jeaa)2czj g15g i 7tewihen moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting orbid1i2 jwt3g,(5 a 7jgzec)p eait?

  A proton is accelerated from rest through 5l6 32bma kie3w00 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction iwb 3kmea 32l6of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated thro0z) mrvxugvfa higw5)* u:y/2ugh 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-field is requ)umyz rwaxgi/0v g)*:h2f 5uv ired if the particles are to be undeflected?