If the north poles of twozuszmh ue-m/c+4p-8-xyqyl / bar magnets are brought close to each other, the magnets wy m/8p-zzxq cu-/lhy +uesm4-ill

  If the south pole of one bar magnet is brought near the northm 3um.*dip( j;btv3gz pole of a second bar ma;j 3gt dbi.*zpum3 m(vgnet, the two magnets will

  If a bar magnet is divided into ay9 fs6blegd 8 :p-my6sf2 og5two equal pieces,

  The Earth's geographic v+q5q d: okc0 cy egsh405w)vqNorth Pole is magnetically a

  The south pole of a magnet points towaqarjmh(pjhbs* fs0 7pb 7c *12rd the Earth's

  An electric current pro q(rqaagd8m 9,7ko*j-gax jw t6k17y educes

  Which of the following is ftlm3 wla cs d:il:uyhw.;.o52pt x/; correct?

  A vertical wire carries a current straight down. To the east of this wirt7km0,opd 1if;gg1k b( nf w:re, the magnetnk0gf ; m gpwdifk1bt71 ,or(:ic field points

  A horizontal wire carries a current straightjw, evshe:9 8jds 9,ep toward you. From your point of view, the magnetic field cau j8spehvw j9d9s,e,: esed by this current

  A current carrying loop of wire lies flat on a table top. When viewedkjn0hv6w;bb5h 3n,a r from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outakbjbn; r5 ,03h6wnhv side the loop? The magnetic field

  A current carrying circular loop of wire lies flatgm0uww o ):0mm on a table top. When viewed from above, thmu:m0g om)0 wwe current moves around the loop in a counterclockwise 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 c9p 8k bws+w5ocizt- -the

  1 T is equivalent totuf:fh 7*g3pj

  The direction of the force on a current-carrying wire in a magnetic 4 6eyy06nlxr qfield is described by which of the followr6x ye6nq0yl4 ing?

  The force on a current-carrying wire in a magnetic field is the mebbz2+- qd ) ;zayiz2strongest when

  The force on a curren n/tcm +ttq34tt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a17 kcwfqa)x1r current straight up in a region where the magnetic field vector points due north. What is the direction of the resultinq c1wafxkr)7 1g force on this current?

  A charged particle moves and experienceo :ug rz:ie8t(r*: dwxs no magnetic force. From this we can conc: *rxugt (:zi8e:d orwlude that

  A charged particle moves wit3fcd/j8tkb h;zu) vki fjf-mb) ec24 .h a constant speed through a region where a uniform magnetic field is presen2/bzc)8k4 hf bj m k.;u fjfe-3cvti)dt. 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 fie kztz ,ywnnto (64), mae,n*yeld. The magnetic force on thkay, )6 mte, (4noztz,*nwn eyis particle

  A charged particle is injected into a *ud8y2/gi ik8 r9dfna uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will9y8rg*nk2dud / a8 iif

  A charged particle is b7x idd7+tm71jj c n-dobserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of theji1-7 n+mdt7jc dx7db circular path would be

  A particle carrying a charge of +e ,xvqzdj/o *r9 travels in a circular path in a uniform magnetic field. If instead the particle carried a charg*v/z x,dro q9je of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V iwnqo+kxq0c7-;s h :: urdfaj, n a uniform magnetic field;,wx0j ardns+-f: uk q:7hqco that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to thw(l,;rio p,b:. -rtbwkrl5dve south but is observed to curve upward as the result of a m(.tr b :iw,k lr,r-lobdv5wp;agnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where thpai/b.n sx;,zo/ 0w:cvkp bt,ere 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 of tb wx0s/ bi,akn c.pv:/p, ;tzohe page.)

  The magnetic field produced by.3qm reb xmu0flbl: q+tx,g 9vh-/3bf a long straight current-carrying wire is

  At double the distance from ayg 9.ww htr;/g long current-carrying wire, the strength of the magnetic field produced by tw9.;g w htgry/hat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tabc;sw 3*q-lhh79cgi z(ky 6l o-rwhb*wle carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carriesh**7qchygc3;9 6w(wkwb silz-l-r ho 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 placed side-by-side on a horizontal tebjg( ;5ap m;b,0nfrk -) fv.xu3nryd able carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the t)j;g ,rfb nv(d5ypb- 3rmke.n f 0ux;awo wires

  Two long parallel wires carry equal curre9logb- w/f 2eaa.+p gynts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force waf2byg-gpol9 +. ae/between the two wires?

  A long straight wire carries current toward the easqvck2gl7 wg6cyk27h+8 lz- oa t. A proton moves toward the east alongsid+ql-kc62w8a g2z7g lcy h ok7ve 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 5j7ck,e q7bxdqv.d/7xjf zb tu3d(0r toward the bottom of the page. What is the direction of the magnetid7 kq/ cvd(ze,0 d7t37bu5fbjxx.r jqc 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-side 6i,zx4zscvt - on a horizontal table. If the wires carry current in the same dire4v, z6xt-scizction,

  Two long parallel wires are placed side-by- 8hze+ )ogyy+dside on a horizontal table. If the wires carry curre+y 8 zodegh+y)nt in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strand o .lm t33bhnprkx9 9v.:c,mdaqf wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic fielp 9mdhbr.9 lnxctqka3., :vm3d 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 92 5wnp;i .bnj yxul;wstrand of wire and bwnn;ix2jy5 l;u.9 wpb oth 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 is

  The maximum torque on a current carryn y *hh8,ttqno;3o)g fing loop occurs when the angle between the loop's magnetic moment af8hyqo;nh3 ,*gnt t)o nd the magnetic field vector is

  When placed askew in a m94,sbed6ir+ k2wnb17j+s/t cfemcigagnetic field, a current carrying loop that is free to rotate in any direction will ex41e 2b7icbmeg9rfn/t6 ,jsc wisd+k+perience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all b67x l*eni36coq tb8ielectric motorsi8it76b6c 3elq bx*on ?

  A circular wire loop lies in a horizontal plane on od30ua wsr,w+ 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 theos3aw ,0 +rdwu 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 particlekxoct7b ar :o dz4i/39 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 zd 4t9oca r3o7:kbx/ iradius 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 thr b qr7 ew*oy *)gf(/bdgzft82sqr( .tyough crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles obgf* f drwy) /r( 7yt2eo q(*t8sq.gbzf 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 electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parali ;xd;b) cjr ftqiq038lel to a uniform magnetic field ofi;xjd)cifb tq 8;r03q
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction o,h6uyf))px sr -ynzi5f $30^{\circ}$ 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 car 7 (eoig0tyb s)2hy(q--lspixrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire m-0iyso(bi lqegp7 x s 2y()h-takes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lonm3srf 5d0rly 0p2c. gtg 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 magnetic force to cancel the weight of0fl rd pmg2.0s5cy 3rt the rod?

  A stationary proton is in4)*u )d(o+9mza0 or teusiwkp a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic forczkt0*)ius)+ e ap d4w9rom( oue 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 spj4m tgi9;y5 -/a fuiqneed 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 fc 8 xn0z0t)/qw+lkx zof $5.0 \times 10^7 \; m/s$ 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 witr70 x /yjorp*yh 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 sp+fcx sf . nggvi4aa;:ri(;.kgeed 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 ofjwnt 02q6jma6 $8.0 \times 10^6 \; m/s$ 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 of 6iuoyz.3gwnhm u(a 95c +-olf$3.0 \times 10^6 \; m/s$ 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 4r :tcuuxmk6 4t4o3i ls(.hhnthe magnitude of the magnetic field at a u4tlr6hmk in .4(xs3: hct4 uodistance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, .g+k +w ,oz- mh*mhpdv10 m awh h.* wgdzv,+ o-+kmpmay?

  How much current must flow foxz1y 5h-a2bba r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current sm3-pz, qsvr yx+5b(:g0yxylof 5.0 A is the magnitude of the magnetic field due to trzxy5+ -by (3g:qy,xlmvs0pshe 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 A5yud54e*p pbh5v frz1 in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wirv5z b 4perh*dp1yfu 55es at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of ) zk85z hm1 ;wla* psdyvy:bv520 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field m)vh ;1pzkabv 8dsl*:y 5wzym5idway between the two wires?

  Two long parallel wires carry currents of 20 A4okz3sxz gf0mlie* b6g639i n and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wire3bgonilezf4s693k z0 * 6gix ms are the contributions from the two wires the same?

  Four long parallel wires each car0gjvgcrbg 83z/z bm8/ry 2.0 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 does one of the wires 8 cvjrbm8gg/3bz0g /zexperience due to the other wires?

  Two long parallel wires carry currents of ;zwvhe9sd.qns 7r7t dpv(a 7 25.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length d9as 7w(svh 7.2;depzqv ntr7between the two wires.

  What is the magnetic fie*retq7wd1plpi ,m,n 7b:wq6.b i: yd lld at the center of a circular loop of wire of radius 4.0 cm wheny*,b pn61tw wm di,q q7i p::ldbelr.7 a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wo.fxzivoa- ssg 6sxpns-0dlx 6,qi 5;.und with 5000 turns of wire. What magnetic field is produced at the center of thx;-5. -0dx66vi n gssszsafo, qplx.ie solenoid when a current of 10 A flows?

  A solenoid with 500 turns)t:h h+i3vj n g ygc5lgfw-9e1 is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field wchj 9: ngilh1t )+3yv-g5ge wfill it have at its center?

  How much current must pass through a 400 turn w j/ l7wlx:ac8coil 4.0 cm long to generate a 1.0-T magneti ww:8xl lcaj/7c field at the center?

  How many turns should a 10-cm long solenwd0dt 7s sukv1q.iz9.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 loop of 120 t3w,(0 i4 mukfsw9lvvp urns that carries 6.0 A if its dimensions are 4.04i0p l,u(m3kw vfsv 9w cm x 8.0 cm?

  A circular loop of wire of radius 0.5.j hv akobh2,x923 rea0 m is in a uniform magnetic field of 0.30 T. The 2 r 3ajo2,9eavxbhhk.current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sect: ts7:yvgsj,m ional 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 pd ub+eyz( jvq:+(: ezhsw;rg6ky9ci4w /:nb A is in a magnetic field of 3.5 T. The lue6;d zsbw:vrbz nyj 4:9cq+ (wp/ (:khyg+eioop has 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 is in a uniform magnetic field ofnolz)q n:o--sqz9*i j 3ab2.4ywppt v 0.30 T. The current in the loop is 2.0 A. What is t bp:-ts*niqlyz39 ajnq.v4 w2zp -)oohe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0jec+qi5r 5qq23le(2+ x nu ligr*u8fg.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whq 3 ei5 (erl8ui+u*xfnclg5gq2rqj+ 2 at is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop oph 4g4mc- ohybcf(2 vp,z*ih ;g 3lt.pf 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 6dr/ sm+(f.-o 5ixsgohxbiz5(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 velocio *,ojdt m/*0vcqu+ yx0i.cctn ix1:fty $6.9 \times 10^6 \; m/s$ 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 an3)pk5w i8of udd then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulk f)ud 5po8wi3ting orbit?

  A proton is accelerated from rest thro c2do7)2alrb jugh 500 V. It enters a magnetic field of 0.30 T oriented per2jab7dr 2c)l opendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befor9mskpe9x :/g a08tx5qii9 e u/cg szg8e entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field mg9ca/9xk0i5ep gtsugq8 xzi e/s 89:is required if the particles are to be undeflected?