If the north poles of two biu hv2m3 zcjm yp0yik*w5cn(:fu j*(nrhw(*:ar magnets are brought close to each other, the magnets willj* n uyhn i hf*wyv*j((:m2ckwmrp5u zc:(3i 0

  If the south pole of one bar magnet is brought neara *8 d5gre:jcr the north pole of a second bar magnet, 5:d*ecjr a g8rthe two magnets will

  If a bar magnet is divided into tw,w eascmlik4k8 t+*vln g 1*a+o equal pieces,

  The Earth's geographic 8skhydhu8 gnikh- 2h 5t *v+u4North Pole is magnetically a

  The south pole of a magnet points toward thez(r zpfcahach2(y .(r5t q;,c Earth's

  An electric current l4 gypr8/k yombtf3: 4v4.cdlproduces

  Which of the following is corpsr:j3zr :hz 1rect?

  A vertical wire carries a current straight down. To the east s 1.r5ql pwzq,of this wire, the magnetic fielp.lw,z q5rs1q d points

  A horizontal wire carries a current straight toward,xq4ytn rh8 jq- bj*o::ts;jf you. From your point of view, the magnetict8qn4 rsjxbjht: j*y: q ,o;-f field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from ab ;2hanhkn*uuoc ic jsr6zsa5q9 clg-74n)+ (hove, the current moves around the loop in aa cnh7 ( h65an u )-* o+h4zsj9c2ksuqr;cngli counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies fg r:hzoz+hl+5lat 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 caused by this current, inside the loop? z+og :rl5h z+h The magnetic field

  The SI unit of magnetic 9 ,smhgu-aw j9:ef g2t :ohq2wfield is the

  1 T is equivalent toam5+tm so oe liir*k-;a,g0n9*6j dhw

  The direction of the force on a current-carrying wire io j9kww0y 9x1nnuhs3m:,i5h w n a magnetic field is desc n9kiywhu h ,ww1 xon309sm:5jribed by which of the following?

  The force on a currenrfdqgo+i aze.7:9mf4t-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying l*gz -uowh07,8d cghxwire in a magnetic field is equal to zero when

  A vertical wire carries a curr )tn6: ud2ace r6l2xx st(l2jx(aik3y ent straight up in a region where the magnetic field vector points due north. What cu( :j2tnrllx(366exsik)y a ax2 2tdis the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From th+/e4oi;:zdur q sop g8is we can concl i:4d q zrugo/esp;o+8ude that

  A charged particle moves with a constant speed 40uu9*x s ckw ef2gi01 yd9opdthrough 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 the particle moves2u wp9 dfko0e10d9xuc s4*y gi

  A charged particle moves acro8t2zt yxg 7 2 hi801s.6ybfrxfltzg s.a.*wntss a constant magnetic field. The magnetic force on this particblf2tg8fty.r nywzh*sgt 1x.8ix7 tzs. 62a 0le

  A charged particle is injected into a uniform magnetic field such that its- x jd-ugj81ev velocity vectv gu8 e-jx-j1dor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular px oyipw*g:vfo65,e ynez1eg j x7) *k(ath in a uniform magnetic f zej6o 5y*kv1ox( *,fiwp geg x)ny:7eield. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a hdrq:vbi3t2vq i)s)) circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wouls))2b 3hqirv)iq :vd td have been

  At a particular instant, an electron moves ea36r m:gwm.j01g6axb+vpk ama)vad7y stward at speed V in a uniform magnetic field that is directed straight downward. The magnegaa1d6:jbr )0kxv a73avm+mwm g.py6tic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwaxqc6. kqb; xdq 4i1fj-rd as the result of a magnetic field. The direcq f14b-.d c6kjqq; xxition of the magnetic field is

  An electron moving along the +x axis enters a region wherebvu5c+s5,qi sn 4mji;a ;kg 9i there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron?cm5ski4ai i j;vnu 5,sqb;g +9 (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wirej5d;d/mp c3xi is

  At double the distance from a long cu+w8q /fz;s8tsv utgj4rrent-carrying wire, the strength of the mag+gsf qtt48j u; 8z/vwsnetic field produced by that wire decreases to

  Two long parallel wires kd/qd ry8z;l1 placed side-by-side on a horizontal table carry identical size currents in d;dy/18lrqk zopposite 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 the point exactly midway between the two wires

  Two long parallel wi.twyp8 vocf94u) 9gvh res placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnet vt99p u.v4fwh8)cy ogic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force3:j4w m cta;.jjxk6oumve3u1 between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betx3ma;c: uj.vu 3k6m4tje1oj wween the two wires?

  A long straight wire carries current toward the east. A proton moves tr 5zcxysb wt( (*9/kqwew f)a9oward the east a9( b5ce afxys ww)zw9/t(*kqrlongside 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 t;le/ oazu )vr rx)bd2el893emhe bottom of the page. What is the direction of the magnetic force it produ8o/mu; )l v2drx39le a) beerzces 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-sil1zzua( maj e. r(c(j(ud+kt5 de on a horizontal table. If the wires carry current in the same directiol+dak(z . cu(z(j5 atj(rmeu1n,

  Two long parallel wires are rg 24mxu/p j2g;fvmv2 p x(v/gplaced side-by-side on a horizontal table. If the wires carry current in opvf2xpv vg2gg2r ujmx/(m4p; /posite directions,

  Consider two current-carrying circular loops. Both are made fr y vf b6axm95zwpp+;z,om one strand of wire and both carry the same curren ya,;+ zm6bxzw9pv5 fpt, 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 the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one stranw9ov2z 1 t9n.emppy9ed of wire and both carry the savw py2no. 9t m9eezp91me 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 loop is

  The maximum torque on 3emmrj 8lje x)v4nhbcr5 ,.:/zbssf 4a current carrying loop occurs when the angle between the loop's magnetib)exj8f34/r,l e.h54 cz m bs jmnrs:vc moment and the magnetic field vector is

  When placed askew in a magne hzeyxxl z;5w9) jvbw9pc,*n0tic field, a current carrying loop that is free to rotate in any direction will exper5x)jwyxcb* hlv ez 0;z,w99 pnience a torque until its magnetic moment vector

  What fundamental fact underlies thtzcmx ei4-aqli15f y, ; 5hqttx6(q,he operation of essentially all electric motors 1mx(q5;i t ht,i-e5tfah, cqx6l4zqy?

  A circular wire loop lies in a horizontal p*w(t md8:qo4 ik-vh solane on a table and carries current in a counterclockwise direction whm qki(o vo twh:*8-s4den 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 m a5o;xjoyr af,4a4 ql(jme byd+ c 4gv6y6co;t0nd charge q is accelerated through a potential difference V and 44b+xoealyt c o6y,dj4qvgfar06cy( mj ;; 5oallowed 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 throuqyrg/z10 l r2pgh 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 tol gqzrp 1/r02y the north. What direction should the electric field point?

  A 2.0-m wire carrying1 9hn8l:h nu/ ghhxg,v a current of 0.60 A is oriented parallel to a uniform magnehnlhv1g ,:g9xn/h8u h tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in irgy/u5ws.3mf, eh,ta 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 cz5 u5tdgn(9oi arrying 5.0 A when it is placed oigt d5zu5(n9in 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 mn;uswt*rd m71 long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum1mutn s*7w;rd 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 ofmz; *2iposhg6;0d l(9 modl0.20 T. What is the magnitude of the magnetic force o; 0difml m*do(2gso ;h op69lzn 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 spe)s5o x .fgwmm+.ykr k8qoa 2j+ed 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 of y 9yc hmmoc * 5eic8q-;0:r6iwq tkd0u$5.0 \times 10^7 \; m/s$ 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 travelingf0jra x1g+pc2 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 ab 1+u; )vvin jrxvi+yox17yp1 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;wj7dg/ u+* swdh8fp w 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 of1k-k 6c8jhn 9/txajdi fs)g(c $3.0 \times 10^6 \; m/s$ 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 mlozlqo:7 x2da- 6.h fcurrent of 25 A. What is the magnitude of the magneticzoxhdoll.7m 2-f:a6q field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatjcs- x psc8 d9.6tlw6qe:ah;des what magnetic field at the ground, 10 mec h-;l6 6 ta:xqwpsj8dsd.c9 away?

  How much current must flow -* gqiugb lvg;.am9y3 for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a 5:*9we g)y) dx3x dl6h9x 4ksae bexjtlong straight wire carrying a current of 5.0 A is the magnitude of the magnetic fieldj)xsxed g abwx*9d4y t3e:lh9ke6x5 ) due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curupkbq(nv6 q * /kgp-(rrents of 10 A in opposite directions. They are separated by 40 cm. Wh/bpnq(pg q*u -k(r6v kat is the magnetic 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 of 20 A and 5.0 A in oppoxpd*-r :pogf9q licmyc+1*)6 a t3na lsite directions. The wires are separated by 0 )*qmanpa9dy pt+l16oc3cr-*lg:i xf .20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carrys ( 3q,k7twveu,old- g currents 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 are the - d,o( 7lg vse3,wkqtucontributions from the two wires the same?

  Four long parallel wires each carry 2.0os vzsp9 gbw6ca:+3 iu09m: he 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 m:96 c+z39:g0v w eospabusihdoes one of the wires experience due to the other wires?

  Two long parallel wires carryqq .e9mdqt9j or6-)gr currents of 5.0 A and 8.0 A in the opposite directr qd m9j9qtq-. o)e6rgion. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loot megyw: *u7k1t5q09jkpz5ef xo d-8dp of wire of radius 4.0 cm when a current of 2.0 A flows in z 108*e y ogk-k mjd5t95f:dwpe7tuq xthe wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field i( v 0fj (zkiu)/kbc7xe0ujm(ns produced at the cen7xib(jcuz( )v0 kun0 j/ fk(emter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current oxaa5d eav-2 m.f 4.0 A. What strength of magnetic field will it have at i xa-2ve 5mda.ats center?

  How much current must pass through a 400 turn c(r.s0dr9 hhckoil 4.0 cm long to generate a 1.0-T magnetic field at the centercrhhksd9 (.0r?

  How many turns should a 10-cm long soge ,jsprc1* ;l,ue9i trm9o b(lenoid 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 rectangular loop of 120 turns thha p dbr-pp4w jq818aldr y,bsuj +./5at carries 6.0 A if its dimen4rb d w8urh5paj8, + dq.byppsj1l-a/sions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radiusb0h;gnrb qn zln7au zg8:37;u9a (p xf 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 plane of the loop i;78 p qb:z97;0f(ban larzg3ng xhnuus perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional areaxj,-e k hx)cprus3h+l92; swa $0.12 \; m^{2}$ 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 field of 3.5 T. Thj2rwl 2,pnn0r/2gp1 ( wtrevxe loop hx2n /,lgrn t rjwpe w2prv(102as 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 i b(:fzxt*urhp :)dz5 ns 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 d hp(5r f) xu:nb*:zztplane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnex;o xj vkvl .jwg)kt/:gl ew.0s1o 08gtic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the 1 jwj:.;0go.vlw0 o lxek) gx8sk gv/tloop is parallel to the magnetic field?

  A circular wire loop, pfovq ;i66zs:6wwhb 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 particle (cay/gybl +/nf p8/s 4vuharge 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 velocidf0;3kj8bh c pty $6.9 \times 10^6 \; m/s$ 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 then moves into a magnetic fi ry)i 3jgb/v00pat+ec cez51.wv cy.eeld of 0.040 T. What is the radius of the proton's resulting orbij3yect.g1e/vi wpy0+5e b .r az)0cv ct?

  A proton is accelerated from q v; ;- ahyrd8q/jg6fhq4+: wvu0jopqrest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Detvh+o6/ r-8 ug qd;p40hfjqyjvq; waq:ermine the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffzy+) 3r+zwzx5mn,l,p gyc 7t nerence of 10 kV before entering a velocity selector. If the B-field of the velocity selectorwzp t+)z,7nl5m,zgn 3yc+ xyr has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?