If the north poles of two bar magnets are brought close l45yv)*46cbpt qarxm to each other, the magnet al) 4p65c4xtm*vrby qs will

  If the south pole of one bar magnet is brought near the north pole of a seconej:n-hibmh bx /.xj07d bar magnet, the two magnetbnh.x/i mhe 0b-j:j x7s will

  If a bar magnet is divided into two equtz8 q-tp*blwr p xr/*3al pieces,

  The Earth's geographic)w/ oyjd+ kqft 7hmh-4 North Pole is magnetically a

  The south pole of a magnet points6moemy9 kh4:v w6akh 2 toward the Earth's

  An electric current prodl) 0 egvb.vo0euces

  Which of the following is correcc0g1bb snzka*1.f1rr1re fz ) t?

  A vertical wire carries a current straight down. To the east of this wir q8tr 12v5rqzre, the magnetic field poitvrqqz58r 1r2nts

  A horizontal wire carries a current straight toward you. -xhqa xk,4u gafzhx6+6va.sj39g3kik3v l h: From your point of view, the mag.xz3is34a h -9 +: xk3ulhkkv , qg6hj6vxafagnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from mj) 15ujefka8 above, the cur j5jmkaf1ue8)rent moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circu3mv03h5-y k je1/)4 ienk xsqqbo z(grlar loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise see)s 1no0( 3/rhjzqmekyx 43g b 5-ivkqnse. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneti3avs;xp(9 1pm2rx msxc field is the

  1 T is equivalent to l 60.d.qdcoamu e6x/m

  The direction of the force on a current-carrying wire in a /aw*5gr nbp4 zgpugx5*c5a( q magnetic field is described by zc p*a p(r5*4gqxba/gngw5 u5which of the following?

  The force on a current-carrying wire in a magnetic field is the s k,j;uru /zxi, v1oxt+trongest when

  The force on a current-carrying wire in a magne;5zlaz 2fbkedp4wdw + fqo,05tic field is equal to zero when

  A vertical wire carries a current straight up in a region whd7 braqs5vm.7e2swe 15 y4nclere the magnetic fiesvc 5emda7 7152ynwqrb .ls4eld vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves a -j6nfm72o8( h9 lwno.aukj pqnd experiences no magnetic force. From this we can conclude tha alomnn(ho96 uqf8jp7j-.k2wt

  A charged particle moves wit)yr7f2pw9aiik/ tzrtd* 91akcu; 9 kwh a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the mau i t;yadwki79 zr*f1/ak9w )t9pkc 2rgnetic force acting on this particle will be maximum when the particle moves

  A charged particle mo) bn vbhy b4-;nrw0rp0ves across a constant magnetic field. The magnetic force on this pa0y nbpw;b)rn h -40rbvrticle

  A charged particle is injected into a uniforma7oz ( lqa80i:gqm ;ajp*a*p p4fkqn: magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wilz;:aa * k mp*j0a4lgoqn8q(7p :paf qil

  A charged particle is observed traveling in a circ d osu(j-uid2-(y0 imcular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circud-m0 u(d2-icusyio(jlar path would be

  A particle carrying a charge of +e travels in a circular path ilb;i-z0dgk p- i-wci:n a uniform magnetic field. If instead the particle carried a charge of +2e, the radius o plkb:0;c-giwzd i-i-f the circular path would have been

  At a particular instant,bzh54z ee)yf / an electron moves eastward at speed V in a uniform magnetic field that is directed straighb/ hezyf54 e)zt downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve i 9dxlhgwc *yp8 /1u:eupward as the result of a magnetic fieldyulw9* e/x1pd8h g :ci. The direction of the magnetic field is

  An electron moving along the +x axis enters ah)9) ez oimfu+k 2yd 9:p v8e,+poovft region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out o ov p+e9oodut9e8y, z i)2)+fvk :fmhpf the page.)

  The magnetic field produced by a long straight current-cm .cczndjucm7j m*/43x u/vs2arrying wire is

  At double the distance from a lofi w q-47i 5d1atay4kzng current-carrying wire, the strength of the magnetic fw1if45ayk a i7dq-z4 tield produced by that wire decreases to

  Two long parallel wires placed side-by-sio rsbt qb/8.r.de 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 lefrqsrbbo .8 ./tt 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 wires pq .xq .b(6xk(b5zgr pwlaced side-by-side on a horizontal table carry identical curren5bqpg kb qx.( (.rz6xwt straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires capytz*/b5 y a m,./la0(cp6gxlfdx ep/rry equal currents. The magnitude of the force between the wires is F. The current in each wire is now dc lg0 fyx/ pmep(6l /*tapdz ,.5a/byxoubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towardq )i-3v+rk5 u:bkhxy x the east. A proton moves toward the east alongside and just south of the wire. What is -vhr3)x +5kb:u y kiqxthe direction of the force on the proton?

  A wire lying in the plane of the page brn/scwb.r: 0carries a current toward the bottom of the page. What is the direction of the magn0b/wnb.c:sr retic 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-by- hf)i;wao p1g(5smkm) side on a horizontal table. If the wires carry current in the sa )ok5 mia fsp(1wm);hgme direction,

  Two long parallel wires are placed side-by-side on a horizontal tablxm uz nn3/oqx,xu ;-,x6/k uqke. If the wires carry current in opposite directionq6uxm ,q3k nxxu/zx;no u,- /ks,

  Consider two current-carrying circular loops. Both are made from one strandhl;gg:7(r -hw lc zs;w of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic-7 rgg;hz(swl; :lwhc 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. Both noc98wxu,zukh(l: 6bare 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 moment of the smaller loop, the magnetic moment of the larger l8c uzb6ulnx :ok(h,w9oop is

  The maximum torque on a current carrying loop oca0in7y j10)8: m yjwjissr8ei nvdy,1curs when the angle between the loop's magnetic moment anj1w yn ye8r,s 1jnv aiiji08s ym7d):0d the magnetic field vector is

  When placed askew in a magnetic field, a current carrying lo2h b5oi7tobe,ie5 xj):ob mq7 op that is free to rotate in any direction i :q)x o5oi,bmoe5j772ethbb will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric mpehq20n w7- vsc(z j8wotors?w-2(7 n 0jzvhpc eqws8

  A circular wire loop lies in a horizontal plane on a table and carries nu( b:6bcm b;md5qe-lcurrent in a counterclo5m lc;b(be-m 6:dqbnuckwise 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 partivz4iclnz5p(c d 7/g v.cle of mass m 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 and oriented perpendicular to the velocity of the particle. Dencg5 47/v c(vzz i.pdlrive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consistss7 qb8vdr*y fv94o0 b9xpwkm - 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 selector, the particles move toward the east, and the magnetic 9opdv*sv7q94m8k yb bf 0r-wxfield is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a 2a;2 ;ijx1fsacpyjqbgm r ./.s87i sscurrent of 0.60 A is oriented parallel to a uniform magnetic fie.rfs8i27 gsqxc;y;.b /jpassma1 i2jld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current 8vxwr0 +e*,(j w.eua5ez mcerof 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 it i6mabp7 y,.dd:k6kh an 4e6l(gq ln)e yf e9j:ys placed in7: l(6fpaej6mbh eyk6ldky.,dy) q ngne94a: 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 longg k s+8rvy* wjtke(b8g7-/hk t9vwva( has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnegtrveb+hj( /t88k kv-w(v kaw7g *9 sytic force to cancel the weight of the rod?

  A stationary proton is in a +ri:yj:dxxx 4vne2k.uniform magnetic field of 0.20 T. What is the magnitude of the magnetic forcee:dr 2vxk.+i4njy x:x 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 speed so 8,r-7fhhwalb3iys rdg4 :c t8l-u; 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 size4 ocw yus,xjjgu2,iv jufs5+64. /peed 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 north witt )7w6a43ugsj9yv q;inoyz r1h 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 spe-nc d76 b7sevdg)n:tbed 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 our6agk sx*l9f*oxlt4) 4s bhro mq:3)f $8.0 \times 10^6 \; m/s$ 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 o vg6ana64m g;ti8yp7nf $3.0 \times 10^6 \; m/s$ 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 wirejb- vzb)5jtv48m zgk: carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m f j 58:vmjvg4 tb-kb)zzrom the wire?

  A high power line carrying 1000 A generates what magnetic field at the 8tcownkax) wp, c) /j*ground, 1 jw)tn8ko/xwpcc *,)a0 m away?

  How much current must flohfqie :(kv 5j8w for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lon2 e0iqrcshwy 2 f/d;u65 c-ekng straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the w uy/ 6c d0; ei5-nqwrek2shc2fire 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 op m:i+(a)*msk c3.r6 yhb rixweposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires a.br* 6km:i s+(a )hmwyex3irct a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposit+.vqmd/ve q:maj :2ypq uu8d* e directions. The wires are separated mep:qa:quj2m.d + vy*q dv8/uby 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry curren 69+ ,dl2:ixvi9sdjtvrubt) p ts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires xdbtt r:2vls 9u9,pi+vd)i6 jare the contributions from the two wires the same?

  Four long parallel wires each carry q susi8);xc j42.0 A in the same direction. They are parallel to the z-axis, and they pas84sq c)sxuj ;is 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 the oppoo unc /r3y-vny9z1n)wsite direction. The wires are separated by 0.3owuzv9yc3/ 1n-ny)rn 0 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fiel0mke)1wk /m+ m;s1jxfyn01tz r:lyg r;u7guid at the center of a circular loop of wire of radius 4.0 +/gyxl0);mkuz m;11ftr jryn70gukm eiw1: s cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnet y1i2i) slxfr*br 8l-iic field is produce8 lfr1-r*x)iyi2s b lid at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turnsb2-0 f x0qa*fw)xrr pj is 0.10 m long and carries a current of 4.0 A. What strengt w0r0a-prx 2* jqf)xfbh of magnetic field will it have at its center?

  How much current must pass through wtpg wap,g205 a 400 turn coil 4.0 cm long to generate a 1.0-T m 0 2g5apgtww,pagnetic field at the center?

  How many turns should a 10-cm long solenoidfb 7mi-btfi-)3 8 wiiz 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 a rectangulapo/ckd.co9ps c0/k* dr loop of 120 turns that carries 6.0 A if its dimens* pdokdk/ccc .s /90opions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifoie y m/*;wlg3erm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is th /e*yw;ig 3emle magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectiona+nx -d k.)bwpzl 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 op7pra ag-x13)zy: wb-ms4k kA is in a magnetic field of 3.5 T. The loop has an area of o ma) kp3bz-kg1p4x:ysw7r - a$0.12 \; m^{2}$ 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 oflqruw54):sa mz9g1drv jh p: kiqz78) 0.30 T. The current in the ) rw)grm:ldhiza7uvjqq: 589z k4 1ps loop is 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 is in a uniform m201el3*gborv 8qqv mgagnetic field of 0.30 T. The current in the lo0bqg* ogvl8mr vqe123 op is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopiphpv.bbm ; 8jc lkj*r;+qp53 of 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 particles hozgkw6/p ry5 q(2.2zpx/gn (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 wiibivh/dek/:j9 9q* r dth 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 a potential z5jjs,0hb1 ,ds5 0lf9ocn detof 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the protf 59csnb5001, sjjdd ,z otlehon's resulting orbit?

  A proton is accelerateclc3*ic,5 tubd from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direbuil5 ct,*cc3ction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 1 7lh dp4*sibi vo4)+m5cbhu f*0 kV before entering a velocity selector. If the B-field of the velocity selector has asc+*bl4 vih h dibp7*)4u om5f value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?