If the north poles of two bar magnets are bri9(m ujhqg952y*o:8owgyh c cought close to each other, the magnets willwhc5 hyy:o2 (9gjmciuo*8 9 qg

  If the south pole of one bar magnet is brought near the north pole of a 3yos*a+loj5ltb9uo) zdq :0ksecond bar+ul9o*y k3q ls:o) ba d0tojz5 magnet, the two magnets will

  If a bar magnet is divided into two equal pieces,/lf 6o9ud :ztr

  The Earth's geographic North Pole is magneti ru.2;)otmsdfh s7b)pcnl 53mcally a

  The south pole of a magnet points toward the Earp:8zme0b 7xfsjn.f 0 tth's

  An electric current produsvs4 4y;b3 y8i o:ym i8dyue;eces

  Which of the followis8+y0(5e ;twvx m1v6ck rrgmt ng is correct?

  A vertical wire carries a current straight down. To the east of this wire, the,o.umqk da5/ n magnetic fieldomqk.an, 5u/ d points

  A horizontal wire carries a current straight toward you. Frohsjd5x5liv9/e k r: v+6fdn 5nm your point of view, the magnetic field caused bydv9 s/ ndhn6 r5ivlek5x5f:+j this current

  A current carrying loop of wire lies flat on a table top. When viewed from aboocgj4k7 b1/,fyjd .bml z v9t1 nn,x9sve, the current moves around the loop in a counterclockwise sense. What is the dd 1 jcs kf,, 4vjmngb. l9n1z7oxy/9tbirection of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lif;l5z5 9+gb8hhfdr/k 4hj2 z)klefd fes flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directioffl2zrgle b45jf /kf)d8d; 9hhh5k+ zn of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fieldfljuk,e)/ek;yd cd 7l:pn(7h is the

  1 T is equivalent tow (v; x z(q;)p 4g:cer0mblbb 4;xzgpk

  The direction of the force on a cz.qfup7-: zp k ay/4)i)voxja:yjv/q urrent-carrying wire in a magnetic field is described by which of the followpz fv7/ juoyi)/a:jk4:q xa pv-) qzy.ing?

  The force on a current-carrying wire in a magnetic field-0rd*( ip,f wgp qy 3emjwq79m is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero whrd me .3kwrm8o8fveb-26 j(tzen

  A vertical wire carries a current straight up5)/yx sjfr6*0-z xkrd)v wutp in a region where the magnetic field vector points due north. What is the direction of the resksupr)zydx056 v- x)/ rfjtw*ulting force on this current?

  A charged particle moves and a0; -+0i /fa5v o ikfww-oegdvexperiences no magnetic force. From this we can conkfa0 ved5 ofa;iv w/-+0o-iwgclude that

  A charged particle moves with a constant7opt 1 1 t-3fp*nd bm 7li5hj+q:bjfst speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic fo7fbptn1 pql j5j dt*obm s7hft+3i1-:rce acting on this particle will be maximum when the particle moves

  A charged particle moves across a co2l5 d0m js:abxnstant magnetic field. The magnetic force onx0s2lj:5 ba dm this particle

  A charged particle is+ b:l 2wfeh xfw:deq;q9q6ao -v5si 5g injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the partwv:wfd;5 bl9oa:5 h ixfge qs+6e2 -qqicle will

  A charged particle is observed traveling in a circular path in a unit )o6h ndhq/0ncs2 mu+form magnetic field. If the particle had u+) ncn6d2th/mhs o0 qbeen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels i (i(*)e)exteahcph q ;/ ld2uh1ls(td n a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have t l))e2eet*d(s(l1h ;ci dhp aqhx/(ubeen

  At a particular instant, an electron moves eastward at s+5 *:hwb0mg; r6jpr w(lpawp lpeed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on a: 5g mrwl; 0bhp(j +pwplw*r6it is

  An electron has an initi 2)l ocrxoj: c),yi3knal velocity to the south but is observed to curve upward as the result of a magnet ooni 2cj:r3 k),c)xlyic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there c*8 f scv,ksl+is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to rightk c*c8 +,ssflv, +y up, and +z out of the page.)

  The magnetic field produced by a long straight currentr lqf;x4/n dd/ 8igan/-carrying wire is

  At double the distancbusbouz*8+ ,pg r)aiyy;1c h+e from a long current-carrying wire, the strength of the magnetic field produ,1+y bsui*;za)cguo y hrb 8+pced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizo1)-qww, g8oo :ytaz( pdsa )pbntal 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 th)8) wwyba:- a,s o(pdp1oqzgte point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table epyw*:( ke cc1carry identical current straight toward you. From your point of view, the magnetic field at the(yc:kc*e e1pw point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the lem1bp+hm8d 0gz,ix17 gprb,force between the wires is F. The current in each wire is now doubled. What is the m7 0br 8d, m epz1gi+hgm,xlb1pagnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A pro24a6ifbdv *ie3 ki)b4g , iuzston moves toward the east alongside and just south ozkv f,42 i4iiag) i63bs edub*f the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carr .xtrggdnf 1 uw4p:l37ies a current toward the bottom of the page. What is the direction of the magnetic force it prodp4ltggwfx3 : .1udr n7uces 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 on a hoqo6 u-h ,z,a0ef:+z ngd 3zejhrizontal table. If the wires carry gh hz+o,e3ua qf-6,zjnz0d: ecurrent in the same direction,

  Two long parallel wires are placed side-by-side oncg5 o2c6b/uz3 +zso 1kxvfxa1 a horizontal table. If the wires carry current in ox+go 5k abx2sc61vc f3/u1ozzpposite directions,

  Consider two current-carrying circular loops. Both are made from one sa5z g,om 1tktule ):di1g,ej 0trand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the cei1 t1,uoj:,l gedgk)e t5zma0nter of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loop foh4vu8b) :ofuq ;u+ws. Both are made from one strand of wire and both carry the same current, but one hasu buou o8: whv4qff;+) twice 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 lqiv. z iu514z nl;-wamoop occurs when the angle between the loop's magnetic v-q41izun mlw ai.;5z moment and the magnetic field vector is

  When placed askew in a magnetic field, a ;t(onm xmz;w6 current carrying loop that is free to rotate in any direction will experience a torque until its magnmwxz;o 6;(mtnetic moment vector

  What fundamental fact underl6teomj0,q d7q p/7fedies the operation of essentially all electric motors?e6o0d/ fd,pt7 qe7 jqm

  A circular wire loop lies in a horizontal plane on a table and carries currenws9ezldli71. 8ihhi up.p zpq*(r: n2t in a counterclo( e7zzshr p ihq*u:lnd1i.9p2w li p8.ckwise 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 interaction with the magnetic field?

  In a mass spectrometer a particle of mass jfip ;bm3v( -em and charge 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;-b fi je(vm3p 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 throughlr*8 u2o8(xpg)jrr hn 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 magnituu xr)nj 8*8rg2 (horpldes 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 current of 0.60 A is oriented parallel to a uniforpdtzl24 1gun*zimirlt0-le t19 s 6 ;km magnetic fi 06t* ni14;-i rlzllzs uekdpttg2m19eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dirs bypx5yoygj( :2 l;-rection 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 straiht(dbm*i2 cnjspp9mq :w,. (hght wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wij(d wqhi(msp9 2pmh ntb.* :c,re 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 a09x+gi e lwan8 magnetic field of 0.10 T. W+nlx 90weag i8hat minimum 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 vv5,ew3haqlfv/ ;* ek 1e7valof 0.20 T. What is the magnitude of the mav5v lw3,e lfae ;aheq*/1v7vkgnetic 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 sh ze1+x+mwib 8ws )ct4fq6hn3peed 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 cbu4x; xi05g-hxa)jtil ( r6 oof $5.0 \times 10^7 \; m/s$ 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 travelingtsfot3 9azq -- 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 speqkl9.b2 xxtj-ed 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 speqtuhg5t/of,ms 7p 9bmr -ga *,ed 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 speedb 4z7-mvj j: )z)zebbm of $3.0 \times 10^6 \; m/s$ 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 magnitude o0lfj/: nx f.j r+psik-f the magf+knsjj f-x/0:il pr.netic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fie:je2474b b q,dcqdm7 s;yu erkld at the ground, 107buk4 7rqbjs4:;dy2mcqde e, m away?

  How much current must flo* dpuq8a 6+tl(tp q/z p)a2/vkzwl3bvw 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 straiq(k5y5xdq ft 8ght wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal td (kfx5tyq5q8 o 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 oppgs8.-*h)fwepm bna na n/d7u7 osite directions. They are separated by 40 cm. What is the magnnnwd 7uh)fem b.8s7aa /*g- npetic 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 carry currents o *x/am;t2jzobpzf x:zn/x *i;f 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic ip*/t;bz:zaoz*jmx2x/ f n; x field midway between the two wires?

  Two long parallel wires carry currents of 20 A ak k.9frdew7 thy4q- 9oqpan.2nd 5.0 A in opposite directions. The wires are separated by 0.2 . ye-2qn7.fda9r q4h pktokw90 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direct7l 6cj+ s zqz :(ez;ionkvc(n0ion. They are parallel to the z-axis, and they pa7c(6ivs z oe0;nqjc+ zl:kn( zss 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 other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in thel1p np(,omhcfzr (,2 8,ql2vncgs 4dn opposite direction. The wires are separated by 0.30 m. Find the magnetic force per uniglrc2 nnl 428, hdcq (po(vnsm1,z,fp t length between the two wires.

  What is the magnetic field at the ceg 8.szem c7pv9nter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in 8g mp7.ves9zc the wire?

  A solenoid 20 cm long is wound with 500lby(hyh* tx-x y8y ,fjpb3(4c0 turns of wire. What magnetic field is produced at the center of the sol*y,y hl-(38xf4btby(x chy p jenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Whjol i(g.n.i*jbgh q u:r (wk+;at strength of magnetic field will it have at it h( b;loni:g+j.j(guw.r* kiqs center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate pt2b;(jvb nnsf0t:c) a 1.0-T magnetic field at the centerpfbnt;cj:(0 n2s) bvt?

  How many turns should a 10tv(ik 2y8si- s6bz 5pu9;qbe i-cm long solenoid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of az*)x-swx:vr;ot alv4 rectangular loop of 120 turns that carries 6.0 A if its dimensionv*xsrv ;4 :wo-zlat) xs are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneti gm(z4vhr ,8smcnyc9d4;un ( 91vlxzuc field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic nrm,x dz v4(9 yh8vu49l;sn(uzg1 mc ctorque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional q1o6-6zzxz udarea $0.12 \; m^{2}$ 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 fielmb83ty/ ex kv3d of 3.5 T. The loop has akemty x/3v38b n 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 radiegh05 8lv ; 7+irslr1 ykedcz0us 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop idzlv+hl18y 7re05; kierc 0 sgs 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is44vh;k1 h lslrmo r)o(r4 lju: 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 th (r;l osj) uovkrhl l:r44hm41e magnetic field?

  A circular wire loop of areopio3i(i, av- a $0.25 \; m^{2}$ 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 parti4-hnmjsbmbr cjyh7;5 0d,r- c),pew kcle (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),xkx,v vonwdj,bnx7;l5v 1 x city $6.9 \times 10^6 \; m/s$ 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 they xs593hk5t/huw. m3rtsis*fn moves into a magnetic field *smt h3h/xwryt.f5u 3kss5i9 of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 50f;-gaa+thz yq pqp,,pam l 2/(0 V. It enters a magnetic field of 0.30 T orientfq l a-taz(/amg2;y ,,+pp qhped perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated throuyb7d syza-n uh28 9l)(lnvj+6xc 4ftlgh 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, -c yabutn(sfhznxjd)984l+6 l y27 lv what value of the E-field is required if the particles are to be undeflected?