If the north poles of two bar magnets are brought close to each other, the 2jctwc s8f e99 d:v v7lv08qeymagnets yc :wdv87fje sv0q 92l ec89vtwill

  If the south pole of one bar magn 4ow-uz vkzbrh 5)f:n. vwf9v0et is brought near the north pole of a second bbv) nzo-9h.r 5 ufvk:fw0w4vzar magnet, the two magnets will

  If a bar magnet is dividem1d1 ul*5e 7ghya3aigd into two equal pieces,

  The Earth's geographic North Pole ubrkl fw4n, fi..4b. zq73fpq is magnetically a

  The south pole of a magnet points towa+n 5r u4eqy3t1fu,6 afpqqhv8rd the Earth's

  An electric current produceir9lsv :e++ad s

  Which of the following is kc,r m3di76qd3 +i cu ed aws7l*3viz4correct?

  A vertical wire carriest24m pj99i h+l ls y(p+g2jrke a current straight down. To the east of this wire, the magnetic fiel2+p9 9+i( lr mgst4ekyj2l hpjd points

  A horizontal wire carries a current straight toward youwqcf 7g(-,nsa w(t4 3zh/ icxd. From your point of view, the magnetic field caused by this current(c4acq 7w,f zi gn-/hs3d(xwt

  A current carrying loop of wire z hrk0ugn i.r*ep/,j *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 fr0kp/r*g., hz jn iu*eield caused by this current, outside the loop? The magnetic field

  A current carrying circ ttk0 +yq;c.*hs6xnjj ular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a count6.xyjjn* hsc0;q k t+terclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is(9vt/(um 9q rd.c. u s*dfpg.1nbd qtf the

  1 T is equivalent to3i:d thdy1s 7q 9-eqyb*ilqu-

  The direction of the force on a current-carrying wire in a magne9 9k 2qk+biugg, nn*mstic field is described by which ofn *ng9qkmgb ius2 ,+k9 the following?

  The force on a current-carrying wire in a magnenc i3ktc0c-. etic field is the strongest when

  The force on a current-carrying 5u(st ps0r sh;wire in a magnetic field is equal to zero when

  A vertical wire carries a curh-xbd5c, *4+trhn- ycnn na:vrent straight up in a region where the magnetic field vector points due north. What is the direction ofc4 5 c,nd:+hanht*rnnxv- y -b the resulting force on this current?

  A charged particle moves and experiences no magnetic force. ucg1 -1+jidi27m egs (gcs gj)From this we can concluig7g+2 c- sgm ui1 )gdjjse1c(de that

  A charged particle moves with a constant s14ke8i jf)h kmpeed through a region where a uniform magnetic field is pke m1 h84)fkijresent. 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 constant magnetic field. The magnetic for(qz1fu* ,3q mcpqy /qpce on this partqmfyppqz cu* ,q (q/13icle

  A charged particle is injected into a uniform magnetic field suchn9d6p/o fdc 3o that its velocity vector is perpendicular to the ma3nc96o p/odd fgnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed t )cy81zqx gsevg11 jt2raveling in a circular path in a uniform magnetic field. If the particle had 1gqcz 2xjtvse18 1)ygbeen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnepf75r7;atw+ 4 w p usf4uzyen+tic field. If instead the particle carried a charge of +2e, the radius of the circul u5 7p es;+pau4f7zw+ny4wr ftar path would have been

  At a particular instant, an electron moves eastward a;-p 6:iohfohfp jq d(dpn 4e6*t speed V in a uniform magnetic field that is directed straight downward. The magneticd6foqpie(hp* d nh;-4 p 6f:oj force that acts on it is

  An electron has an initial velocity to the south bur)rw5c eb- u51gl7h7 hzdp) eon 6bbt4t is observed to curve upward as the result of a magnetic field. The directiolero56 b1dhz-)eb7 u 4bhcr5g7pw t)nn of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform kcys6c;3yed/8uhh5 ir)b d )emagnetic field in the +y direction. What is the direction of the magnetic force on the e yr ech8dui35 kdy;/eb) s6)chlectron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight currevrq3zjbw, +oet 2 8.obnt-carrying wire is

  At double the distance from a long current-carrying wire, the strength op/0 5qw v,p-g(eiz1d /loyu zyf the magnetic field producedlz e/5d/0yvgz (qyw, iou-p1p by that wire decreases to

  Two long parallel wires placed side-by-side onlh2pd 8v3+c jd 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 from you. From your point of view, the magv2d8jh l3 d+pcnetic field at the point exactly midway between the two wires

  Two long parallel wires pl 8zg0+y69 :ntlknpei qaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the poiniy+6l 0e9g:z8kn t pqnt exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betweh62yo5y:5.o dm hn+gmioqie5en the 6h5o5 +gmd mno:y oi5i.hy 2qewires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. b hg 5cvp.dh9)1v,p6cggd)w g A proton moves toward the east alongside and just south of the wire. What is the dire65)pgc vcb)g,h.9pwg 1vdgh d ction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the4h*tv +xj 8w1yof 7rhd bottom of the page. What 1jh4xyw*f7+vr 8to dhis 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 su 0ifuyj 77c8iide-by-side on a horizontal table. If the wires carry current in theci7u j iuf087y same direction,

  Two long parallel wires are placed side-by-side o+mcio;m-aql : n a horizontal table. If the wires carry current in op:+mi;m q-oa lcposite directions,

  Consider two current-carrying circular loops. Both are made from one strand o40 8o8)upm1geraf*ix g ; uxxef wire and both carry the same current, but one has twice the radius of the other. Compared to the me4i* ux8ga o0;mxefu1)grx8pagnetic 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 strand okzbq-lyfa s(8k8 x 86bf 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 loop i88lza b6by8xs(f- kqk s

  The maximum torque on a current carrying loop o+w:q-eotgxb vlt*; 2jccurs when the angle between the loop's maxbq +v*o w-lgjte:2;tgnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carryieh*ael;b:ji)a- f3k dng loop that is free to rotate in any direction will experience a torque until its magnetic moment vecto fl-3e;hbj di)keaa: *r

  What fundamental facl/30-vwwrzjh t underlies the operation of essentially all electric motorsh r0/zvw-l3w j?

  A circular wire loop rwf(a 9 1nd8hxtmo5h6 lies in a horizontal plane on 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 caused by the currents inhhx 18 (f659do namwtrteraction with the magnetic field?

  In a mass spectrometer a particle of mass m and char x3v7b 3dqtod)ge 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 pax3v td)7qbd 3orticle. 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 through c ;bv6/tpjjmq 8rossed 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 to the north. What direction should the e/;j t6jbvqm8plectric field point?

  A 2.0-m wire carrying a cu gxfzh5lqvx; s24x z34rrent of 0.60 A is oriented parallel to a uniform magnetic field off 2zx4l; g4x3 vx5zqsh
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direp.3-c tlve ;rdction 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 carryinp.oy awt:)tn2pc 6df3g 5.0 A when it is placed in a maofpt 2 t3pcn6a.yd:w)gnetic 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 long has a mass of 0.050 kg and is in a magneinu9 zfr e5/2ktic field of 0.10 T. What mirkeu2if9z 5 /nnimum 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 84k87nmiti8dxz4y8 omop 6 w k0.20 T. What is the magnitude of the mkk8m8i4xw68yinm 8d4 oz7optagnetic 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 b0 90)vdomkdospeed 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 m4 r)e(tdn2 eea 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 due north with ,:b z7g h3q eqs 638vs;0whk7fwc obvpspeed $4.0 \times 10^5 \; m/s$ 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 ogjl 077 tgp yp1tn:s1vf $8.0 \times 10^6 \; m/s$ 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 k071fn wib8jr wg e -,w2vfd:yspeed 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 ofdb e1 4bt5yy1a $3.0 \times 10^6 \; m/s$ 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 cz2 qoz 0z9xi:n0ws a*carries a current of 25 A. What is the magnitude of the magneti09 zzo20* inzqxacws:c field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A geneausn9f(1u ))d botg9 drates what magnetic field at the ground, 10 m awata (99 f)d1nub g)osudy?

  How much current must flow forwm7/4q h0 kvms $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current ofs 2nb4p2oqi qq2 gts rjvhd -7(u0:2ln 5.0 A is the magnitude ofhi l2s2ngsq2(:j7qvnt dqob204- u pr the magnetic field 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 currents of 10 A in opposite directions. )e9efhbu ;x(4c qdb c, They are separated by 40 cm. What is the magnetic field in the plane of thcexh;(bqb, uefc d4)9e 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 dmftc-b8 igyp 0as47+aih z4c 5opg3qc*0n.dand 5.0 A in opposite directions. The wires are sepi cbsm7ypp0 ai0 3g5h8 * n+ctfg.da4 od4c-zqarated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 8.)8tni:n rodvb9 6f*uf hyc:csjnw ;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 wires the satbr9ns:w c)odf8jvn cnf :yu*h 8.;i6me?

  Four long parallel wires each carry 2.0 A in the same direction. They are par4ml mzmmwia b-,i- b w(cazxmrv-5)8tr48;xlallel 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 to the otheriazlrz4---l wvmx8m) ;iam 4rbtxb 5 m8m( cw, wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposh j obp+gk*+l(h u3id/ite direction. The wires are separated by 0.30 m. Find the magnetj/h il+o gp3bkuh +*(dic force per unit length between the two wires.

  What is the magnetic field at :ynv.gf zr./ vthe center of a circular loop of wire of radius 4.0 cm wh.g. vvy/fzrn:en a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fiel)aht6apv zo4iz/,1 rb d is produced at the z oipt,r/6za4a1vhb) center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m9v em js- bm:;x5,/jzlma.xh y long and carries a current of 4.0 A. What strength of -/hme j9: .v,xylsaz;5mx jmbmagnetic field will it have at its center?

  How much current must pass through a 40v+z+ k0ta rrria+qiz 8wi 4)3zx3t.vw0 turn coil 4.0 cm long to generate a 1.0-T magnetic fi+r )a4zw x0vvz.ri 8rt 3izqa+ ikw3+teld at the center?

  How many turns should a 10-cm long solens5vi.zrl rkk ;j*9tgq1z851qoyky :m oid 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 lyxh5yedk;q pn bt cr0(,(7l o fq39u7joop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0hn cr39(fqu7jpoly ,5q;b (7t exkyd0 cm?

  A circular loop of wire of radius 0pekjiwjf6f/vp h f ro7k z2m(f5/bb,t:);6ed.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 perpendicular to7r56tpbivwhk/f,pffbz6 2 me d)oej j:kf/;( the magnetic field?

  A circular loop of wirya 5g6lpy24 5kof 1zwre of cross-sectional 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 ad-efsb/1/rqk3wn+t 2n s.w qw current of 2.0 A is in a magnetic field of 3.5 T. The loop has an area of./w-f 2t1wk+ qdrnssnw q 3be/ $0.12 \; m^{2}$ 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 0afp q z.nv9bvz* 9i15b.30 T. The current in the loop is 2.0 A. What is the magne9nzv 1a*zif5.9b qvbptic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of r4 xeqon+wf(o -:adcf lay*8wb566tqeadius 0.50 m is in a uniform magnetic field of 0.30 btlw6*-68f qeo+aoc 4 f xwqnaey:d5(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 magnetic field?

  A circular wire loop of area 1q(7 ;.gpbm2rxxxhh (vnt s. e$0.25 \; m^{2}$ 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 ppj (0z509g ifji77p7 /lcbem + odtkizarticle (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 wiveh7(vp1 a s3wth 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 throuo z;1praymvjk y(3/ 6jgh a potential of 1.0 kV and then moves into a magnetic field of amyj1( j6z /o3 rpvy;k0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magne5y1 i0;es ljvvs.kq-d tic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radiusqvj10 yssdvk-.l;e5i of the path it follows.

  A beam of electrons is accelerated through a potenlja8u)j3y:l5sud5 g-j ) tm ee8rqe2ktial difference of 10 kV before entering a velocity selector. If the B-fieljey tu88qkl2gm5)jdl 3aj) e:e-5sru d 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?