If the north poles of 05svbolv.h )w8i rvf9e4gr b3 two bar magnets are brought close to each other, the magnets wb.rvrwv9 30f)bvhgo l si 845eill

  If the south pole of one bar magnet is broug6(tvz+ ab +qqy5vgq +hht near the north pole of a second bar magnet, the two magnets will+ 65+y qqv(tb+vqag hz

  If a bar magnet is divided into two equalbn/)cast,m a 9b4r1bo pieces,

  The Earth's geographic North Pou,i1r:o6r,yc e8ev1y q vx+mh le is magnetically a

  The south pole of a mag-k r 3*s2 zvq5h+b,5nf.v9fzatyjncz net points toward the Earth's

  An electric current produce1.m+ms pq -gk7bm5v kg( ms:dss

  Which of the following kmb4bdu 0 *s -s3jfwj2en2l t9is correct?

  A vertical wire carries a current straigh eb:k2.u /8m 4ggvbdf-mv/gw3o-da a at down. To the east of this wire, the magnetic fieldgom/a gfdm:w/ ebb-uvk3g -2da 8.va4 points

  A horizontal wire carries a current straight l;np bdk/wa 8*toward you. From your point of view, the ma dnp/ law;8kb*gnetic field caused by this current

  A current carrying loop im4 e- r.rd ghis9-6zhof wire 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 field caused by this currdi 4r6 9gh -rmehisz-.ent, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tableoy l+q , wwut2w4j:*ab top. When viewed from above, the current moves around the loop in a counterclockwi y+2woub 4 l:,*wtaqwjse 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 7 yvbbh4-ml2-xex , damqad f:3,i3yvis the

  1 T is equivalent to)wu 2 z,.que3kzhpjq -

  The direction of the force on a current-carrying wire inzp5r-zjt /wbh7q7)v e a magnetic field is described by which- bp7 5zveq7j/wt z)hr of the following?

  The force on a current-carrying wire in a magnetic field is the str,+x sx 8gq+.g.zd vwih2dzp0eongest when

  The force on a current-carrying wy6iu0 :xar:w 5a .kwbaoj8p) wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a rev lnh9n. cvs /)b2m9dlgion where the magnetic field /dl .lbv 2)shmnv9n9c vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences n5l zo(*fz o2fuo magnetic force. From this we can co(loozfuz5 f 2*nclude that

  A charged particle moves with a constant speed through a region where a un4.o4 u;cw fl m8rhog 263hplbbiform magnetic field is present. If the magnetic fie3b8l2pwhoo hg.6b clu rf44 ;mld 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 m7 d2*zxo:pewp,fvq r3agnetic force on thi2 3ppr7*v,de:xqozwf s particle

  A charged particle is injected into a uniisfelyg9t+wwo b17r37+:u2u r /dm vgform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wilrluv9ygwwt7+gei1+37os/f m dr: u 2bl

  A charged particle is observed traveling in a 2c(nalam +r +.bjxio5 circular path in a uniform magnetic field. If the particle had been traveling twicex+a a.o+c52lmn jibr( 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 magqd,ss8 xz 60 gedj(1kknetic field. If instead the 8qskz( ,dj 6dg0e ks1xparticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at otic* z s+3r)qspeed V in a uniform magnetic *o3cti+qz)sr field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the vo v:h,/o.eempe sb/cc1z+n sk*4f7c south but is observed to curve upward as the result of a magnetic fielepov1cb /h*c: , 7+/z mok fs.cvesn4ed. The direction of the magnetic field is

  An electron moving along the +x axis enahr 1 jd-p3u3tters a region where there is a uniform magnetic field in the +y di3 jpd hu13art-rection. What is the direction 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 uy:,)0nifiy astraight current-carrying wire is

  At double the distance from a long current-carrying wire, the w+m,wzsj-48 cr)efrih:j0 xpstrength of the magnetic field produced by tha,ie jz -+r h:)w p4csj80xfwrmt wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identi zn,50dq8+(8qie hsyghy-ev+x vnb-rcal size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away f-0 5i8y exn (ys8dbrq -h++,qg vvnehzrom 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,ux+r e50 e0sya:ruo *n tf(id n1gyp7 a horizontal table carry identical currenyo:arseu 15pxgf0e ni,(7yn +d t*ur0t straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires bt69*d0reln 35kwjor9 rdm 4ar 3;bz tcarry equal currents. 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 between the two 9r0k *4tj 9lwrbd; rnbm6rd3tz3oe5a wires?

  A long straight wire carrixqx t4d0mv tt/m( 1yv5es current toward the east. A proton moves toward the east alongside t50mqm txdvtvy14 x/( 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 currentm6 gj.3uawt v: toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of themga3w :vuj.t6 page, from your right?

  Two long parallel wires are placed side-by-side on a horizontaltxhg7ua bhfc ;(zs t0z+1 cfodc1h 1,9 table. If the wires carr7 ( fhz9sa c0h1xchf 1;u1t docgzb,t+y current in the same direction,

  Two long parallel wires are placed side-by4rpm en .w:v8-asvr 5e-side on a horizontal table. If the wires cara5.e :8pm4v-rverwns ry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strae zrjvvd)2y: ,nd of wire and both carry the same current, but 2 rz,dvve:y)j 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 cl1*ap+(aew 6 x2 p*hwl efxuq(ircular loops. Both are made from one strand of wire and both carry the same current, but one h ex2wl pe fq(xu 1alp**6(aw+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 cu)d8( o z32bthyja(jf6hrp s(srrent carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vectob(hjy6) s( fpth(jr2dao3sz8 r is

  When placed askew in a magnetic fi8azey1 jg* c9v8jeu h)eld, a current carrying loop that is free to rotate in any direction will experience a torque un9jug 8y z) hee18jva*ctil its magnetic moment vector

  What fundamental fact underlies the ope cf ag+r*3(rx /3w w6kmihp96lhr2rofration of essentially all electric motors?6c*lparrhw wh3+okmig2xfr93f/ r(6

  A circular wire loop lies in a horizontal plane on a table aeue *+ g9in4dand 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 to naegi+d*4u e9rque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throug9r.5uoz;jveb i*y u 0gh a potential difference V and allowed to enter a magneebu jzu90i.;g *yr5 ovtic 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 coj(pc ,(ty3u: wkjas*)jy ubl8nsists 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 field is directed to the north(y8 b juaj)pj,3 :lu( csytk*w. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parall)k s 3amdr2)ok5nro7q el to a uniform magnetic fieo amd7 nk o2s3rk)r)5qld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A vwl0; 0x :2 aph7iqxuqin 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 wirw2b) 7ztv sdvj6pno,*e carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wi7znb t6vp,w v*ojsd)2re 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 w+a zu oc98o1sa magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rodwoacu1o8z+ 9s?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the ,d .vv5bq3oo7yfj o5byqq0fn hr*q*.magni fh7 ov 0 n qd.,j*yvqo.yf5qqo5b*b3rtude 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 withf o): k(:ihsn 5wy)b48uk3hl8sj nldm a speed 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 o( /;wf1mx/l yay2pvwsioc,8 zf $5.0 \times 10^7 \; m/s$ 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 wgfc.9 yb55ne nith 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 speed ofbwyyf r-,4 36aunck q)nj t/b: $8.0 \times 10^6 \; m/s$ 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 wiop4/as:f )qx lth 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 speedlo5 w .a zphqpx9.)ej5 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 2 bda: 0qjwsb)5or u2n:5 A. What is the magnitude of the magn:br) j0qasou dbw5 2:netic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 Aw: 05jzjyrne6xx.dbf3 2 -rs p generates what magnetic field at the ground, 10 m away2xj:e. f0wr-nbr3x6p5d sjz y?

  How much current must flow fdxot63i (iflnm t6e 0 w4,o. tqm;zdh(or $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A ispr9aj9v6e g*jd ol70v the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fiepjj7e90 rda* v6vl9gold of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. T;,yz 5vnchz5 xhey are separated by 40 cm. What is the magnetic field in the plazv,zy;5 n 5hcxne 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 1yj baj-r-uh*d(z) nf nc k4y.and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is y4 (rbhu.j)n* 1ynz d-f-ckja the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A anv8u*vdl2zbj) kfc 3d 1d 5.0 A in opposite directions. The wires are zdf c2 uvklv3bjd* 18)separated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each car (2n g5llehf.qry 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 man(l5ge2 qfl.hgnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry cu s(tewr)-*vd b 6ljc,hgamr78rrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Firtdhl7b)8,* srvm ag c( j6ew-nd the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radius 4.)c9+xedz5rwv;v3 (lwhw y ) si0 cm whri(eyw zlwwh) )cvvs93;x5+ den a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fi(im,miz((gzwu 2 g;w;pl 0md teld is produced at the center of the solenoid when a current of 1l( dtpw2i(, mmwz g0m;ui;(g z0 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0. 5fnyiof9, 3)npibj i6h4j vj A. What strength of magnetic 6if9vjn.3pfoj4i i)n,b 5jhy field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generatew,8hwiu0ae *n a 1.0-T magnetic field at the, w8na0uwih *e center?

  How many turns should a 10-cm long solenoid have if it is to generate ay f4l .dsq;k-y $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop of 120 turns thmgw *9irdv2q( vk 0y)pat carries 6.0 A if its dimensions are 4.0 cm x 8. gdkvr2(yv)wm pi* 09q0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magn:p /iyveli x0w 5q5zd(dw:k3ietic field of 0.30 T. The current inpyvz5:: ei0w qx/id(dl3i kw5 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-seq.ikbtf 2 i n(3:3inuuctional 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 ofsxq0 t58(tnlv y2 lqv4 2.0 A is in a magnetic field of 3.5 T. The loop has an area of( 4l50v sv2lqxyn8tqt $0.12 \; m^{2}$ 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 m68u)b6bnnc auniform 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 parallel to the manbucabm8)6n6 gnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnet )u7u/ z5-qxkihhz: kgic field of 0.30 T. The current in theu q5)i:z kkzh7xhug-/ 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 ( 7hd1g4y robzof 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 (charge e) has a sowh/;in 7w kg2peed 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 9gk4afkvvk 01 with 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 1.0 kV and then moves into a magnetic n)7x8q-h8 bdy oo /swafield of 0.040 T. What is the radius of the proton 8 ad8/y-wb7 ooxq)nhs's resulting orbit?

  A proton is accelerated from rest throu p p0u3 mv792kh)2ndxu -j o7cbai)yucgh 500 V. It enters a magnetic field of 0.hi-)nc k2vj)dop7379x y p2m u0ba uuc30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated xv+-8z4pdi.ko 1 vzjrgtz:c : through a potential difference of 10 kV before entering a veloxd:4jz+zrgp: o cvik z.81t-vcity selector. 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?