If the north poles of two bar magnets are brought close to eac:0a1qb;ghwv :1* blf0oc bth sh other, the magnets will0whq cvaosb11gtf;hb*l 0b::

  If the south pole of one bar magnet is brought nea4d jz )0s0j+c s,oerq8j rahw1r the north pole of a second bar magnet, the two magnetso+z,dw8) qjc1ar ej 40sh0rsj will

  If a bar magnet is divided into two equal pi-t1 o+bmaiv5reces,

  The Earth's geographic No+zo bj h;(9hg jqn4gl2l;:p nyrth Pole is magnetically a

  The south pole of a magnet p 8d /ue14ykowcpi;yl cj/9(daoints toward the Earth's

  An electric current p/a9 q1fo* eivaroduces

  Which of the following 5dqf(h i)ko3z/mj .ue 6ts2- 7puooahis correct?

  A vertical wire carries a current straight down. To the east of this wire c1 wacykmt +v)idmb40,pjp/ 7, the magnetic field point cdyiajpp )c/1mbw0vktm4+ 7,s

  A horizontal wire carries a current straight tofj zdjz2*+amq; gv24oward you. From your point of view, the magnetic fiej;g zmv4zfj q22o+d* ald caused by this current

  A current carrying loop of wire lies flat on a table syct .e7.qr4y top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directic7r yt eys4..qon of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat oab-ozeq)pk)df8rw xw0q.f0( s y jf30n 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 by3(8j-xz)w0k oaf0 wrbq pfesfqd 0y.) this current, inside the loop? The magnetic field

  The SI unit of magnetic l t;l7faf1j s8qc7e6* j r:hzpfield is the

  1 T is equivalent togk;3e2r*zn0oz ,raqa7r .q ip

  The direction of the force on a current-8s5vzh8dz80b. k g)rw e(0ajj(pj sfkcarrying wire in a magnetic field is described by w8hrfg 8sze5vkkz(0 ps j8)0wdjb (aj.hich of the following?

  The force on a current-car/8tc,xfzo+xp7jhs u6rying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is eq e,bivy9wp:xe9-m g. pual to zero when

  A vertical wire carries a ivrr 2;;vfbw; current straight up in a region where the magnetic field vector points due north. What is the vvrifb 2;;rw;direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thif) 2uxe j1,nfgs we can conclude x2 fj1,ufng)ethat

  A charged particle moves with a constant speed through a region where ar y2mvd+rj +h72dpk7b uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the pahp72ry m 7jr+b+2dkvdrticle moves

  A charged particle moves acro5v2vd)uz4 jllm5nc c,ss a constant magnetic field. The magnetic force on this parvuc, lz5d54cv2 jn m)lticle

  A charged particle is injected into a uniform magnetic field s80t8/g0 gzs ko t s+szrg(vgksx7/g e3uch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the part o rkg t8szkv0 ggs gs8x/e37stgz0/+(icle will

  A charged particle is observed travefw 5uj ++ao-6x 7j2ngq q,azksling in a circular path in a uniform magnetic field. If the particle had been traveling twice asw+goxka q5z6n- su+a , jfj7q2 fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path.r:yydodb v9 fe 75*, fn,qowa in a uniform magnetic field. If instead the 7 e5q9v , yf*d.y o,r:wdonafbparticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, angvvf/ *b+ jl:d electron moves eastward at speed V in a uniform magnetic field that is directed straight downwarblfvvd *gj:+/ d. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obsz,:8vot :bvww24. be8ld j sdverved to curve upward as the result of v.zel bd4tv jw8ows d:v8,:2ba magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a nm x ie3.m5*q;0d / ybp8cobejregion where there is a uniform magnetic field in the +y direction. What is the direction05jn .3eybmp8* eqcbdi/;m ox of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curr( :cpb *mera-o7ysv k-ent-carrying wire is

  At double the distance from a long current-carrying wi6s a8*t )0z0soykj9ejpv/d zwvk a z+2re, the strength of the magnetic fielpjst6a )8kv0*zokwzjs dazv 2e+/ 9y 0d produced by that wire decreases to

  Two long parallel wires placed side-by-side okcwt (m 0w1kf4n a horizontal 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 fro k(1f4t 0wkmwcm you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placer88sz rxdz9ze / :l9abrfz/d3z4 ap/ xd side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point d9rexf93 4/ zsz ar l8zz:apd x/8rz/bexactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betw1n (y rkz eqzh/r5i5;reen the wires is F. The current in each wire is now doubled. Wha1kh y(rni5r/ ;z5qz ert is the magnitude of the new force between the two wires?

  A long straight wire carries current towardde-sx jy-)xr+d38js ;sot. ydw/ef; c the east. A proton moves toward the east alongside and just south of the wire. What is the direction y3d wdo/.;xj tsj 8-seersfxy;+d )c -of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bott njx1t6jgidy(dk(n , *om of the page. What is the direction of the magnetic force it produces on an electron 1 n6( dj(kjgn*xy,dit that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are plac9dmskz2 .j9 jjm9 jmg2b +wm,ded side-by-side on a horizontal table. If the wirmj+mb9.9m j k2g 9m, d2zjjwsdes carry current in the same direction,

  Two long parallel wires are placed sio:.22h,v0jm 7jac s alz)cug wde-by-side on a horizontal table. If the wires carry currenj mscz:2j.0oh,a2)vgwl cua7t in opposite directions,

  Consider two current-carrying circular loops. Both are madl dz95qn 8yw2-r.7u2d veua fee from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magyw nl r-f7uedva 58u .2e2zdq9netic 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 fr m:kv0e*ww s4v9gd. ilom 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 magneticw9vivg0:w* m4e ld. ks moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle betweejq*tff:;2bxj8wv c qla 10n8pn the loop's magnetic moment and the magnetic field j 8*0 q xt;qv2fn8ljcpw:1 afbvector is

  When placed askew in a magnetisiew- s-i68tn c field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic momei6-i ws8tn -esnt vector

  What fundamental fact underl5t)8 uute9n7qz boe/ f3y-wmyies the operation of essentially all electric motors? eomuq5w3zy/ 8tfb )9e7yu-n t

  A circular wire loop lies in a horizontal plane on; kmr hc;27tnoy7 v nb63fii7j a table and carries current 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 cause7ir6ht7 2cniybmkojnv 37 ;;f d by the currents interaction with the magnetic field?

  In a mass spectrometer a phw x0bcm(.kra2)(; (i kcqvog article 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 rakhw0(rxb c qvk2;g cmo( ).i(adius 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 chari4 r421;(c )dt in-frn syhv)abtafb/ xge.-hged 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/fde ht.y) 1 ;nir-g(afxba44n) i-sr2chvt b, 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 direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniforo;(p4 xqy cz7njn+caf ey1 y)9m magnetic field q;yza)4+9 j1c (oef7xcy ynnpof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A inz7vuw2edc6g 3 fdlf8+le/alwe82i1r 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 ctdnx3dqun)pr9 2-h 1r eo ta+ 5kd2c,meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wiq2re1, ncr on-9 k t53da)+ptxdu hdc2re 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 a magnetic fieltj(+0b -:h,qo(x,ufg l5kd m cm*auptd of 0.10 T. What minimum current in the rod is needed i0+ubcm(h 5dx ta*,mktjo upf(g ,ql- :n order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field o o7j0lzc,f/ykf 0.20 T. What is the magnitu, c0f 7yozkj/lde of the magnetic 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 q 5g), 6se-quk2ljcf3vq8pa kspeed 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 ofz nf kyuc4-9;;l gdcn9 $5.0 \times 10^7 \; m/s$ 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 dudv4mwku;:g74 sy1 6iscy6 geg3 gj5nb e 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 spe*vviu2g8hqdj; yn c4t cp.;e zr,u) r/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 af640 in w4jcgyya: sb4 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 speeda ,qnj0 66qp.9kkfm re 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 of tdc -sh4 f19 vd.h t0x8ux,obpbhe magnetic field -p8bh1 dc94s0u vtxdx oh,bf.at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generategf)m ijyf mt810 ow5d0to.2 yhs what magnetic field at the ground, 10 ow0i)f m.ttgo8yhmj1 52fdy 0 m away?

  How much current must flow qwn01:j+x yyjfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a e(x mn(ycm muj22 s0b*current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the streng2( m0mnsux( *y2bej cmth 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 directions. They a(3y k-jn5effnre separated by 40 cm. What ifn yn(3ek -fj5s 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+i/ x t5dgfyy6 currents of 20 A and 5.0 A in opposite directions. The wires arei/y6ydt5f x+g separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 208b-+ ur*ov wit 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 contributions from the two tb*o- 8wiu+r vwires the same?

  Four long parallel wires each carry 2.0 A in the same dioj1y-9o iwx 2xr6 k.zbrection. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm pos 9 .yzb6wj x-kr21oxoiitioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wiry/6mh n *n*i 1lsm-ijnes carry currents of 5.0 A and 8.0 A in the opposite direction. The h1im6*ln njmsi-n /*ywires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the centvp8m3r2z 1die er of a circular loop of wire of radius 4.0 cm when a current zpd21e8rm3 iv of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire..nwhjs.5bl.dpg6lq gfu 5,u 0 What magnetic field is produced at the center of the solenoid wheg.swnl5lbu d.q,f5.u 6phgj0 n a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 48bw9u qkiz8 eu. *n xwg:,hca..0 A. What strengthkg,nx ue8iwb u.qcz ha9.:w8* of magnetic field will it have at its center?

  How much current must pass through a)l/b p1 di)ue7m4 j yt9wwbi)v 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the ce wv17 9b)ulimjw p4 d))bitey/nter?

  How many turns should a 10-c)auxl077apq n kco2s5 m 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 a rectangular loop (niax 11uoar8 wqj-eq 7v4jc)of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 c 8ar1xwej)c nqiuv714a(o-j qm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.62pbyceh/1 a* lpa 0oq30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is peh/1 2yba*6p0leop qcarpendicular to the magnetic field?

  A circular loop of wire of cross-section( y 2yjth h,(:ll s(c2kqoa)inal 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 +ifs7aau a7 z)of 2.0 A is in a magnetic field of 3.5 T. The loop has an areai aa7s zf)+a7u 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 radh +2c98avkjgkguh 8a --af*z nius 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 aga-8-h n8+vguf2h 9* cjazkk 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 magnetic field .gk9.-kltrjb3 1 wh 13ovssl fmdw5e6 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 magneticr.ebgw3s s 569dl.o-t 11k f mvwl3kjh field?

  A circular wire loop of auqs,ov, zmdp,b ,)c q *z5gy2jrea $0.25 \; m^{2}$ 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 (charge ezma(n 5t0,l a ksp+k,m1kw;vw) 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 /sbd7 b st gtk9vb8qra66sev)5/ -nfg 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 of 1m-*hja/;ah y w.0 kV and then moves into a magnetic field of 0.040 T. What is the radius ; ha/j*- hmywaof the proton's resulting orbit?

  A proton is accelerated from rest through 500 oz(ehd7ip +8lcdrudf t h3);*V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine tz83 dphh7;f udtr*d (oi l+ec)he radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10x jlj7hnv,0 m /.4q*vsit0/psgpnk 9*omyne1 kV before entering a velocity selec txeq,1sonv//4**g7s .p90p n mjkl nyhvj0 mitor. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?