If the north poles of two bar magnets are brought cvha wwev)9)vox0j55 olose to each other, the magnets w5hvo5 0eow9)v)w ja vxill

  If the south pole of one bar magnet is brought near the north pole of a s:4 6pspemkvk6econd bar magnet, the two magnetkv6e s4p:k 6pms will

  If a bar magnet is divided into two eq zfs3 1bk v8pibud/6o-ual pieces,

  The Earth's geographic North Pole is magneticallpe0x sup.f(zj: 0fgt*3mxki2 y a

  The south pole of a magnet points toward the ww 5twp4;qq,s+bc u b.7f2qiw Earth's

  An electric current produczb/s 6cc nlz* awy,ryrs5v88- es

  Which of the following sc bomdb w3+3b /ly8k+is correct?

  A vertical wire carries a current straight down. To the east of this wire, thct38a3;-45uf;i p pg )by am gsych)jze magnetic field poig a)a-t38gi5; c )4jyu;pphz fcsybm3nts

  A horizontal wire carrie);/d*di*nffrk tmt n-s a current straight toward you. From your point of view, the magnetic field caused by this curreifn k;dn )f/d*rt-mt*nt

  A current carrying loop of wire lies flat on a table top. When viewed from abo84kh;be4;sd s 5mh wksve, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic 5k 4s;dhs8;hmwb 4eksfield

  A current carrying circular loop of wire lies flat on a table top. foy/h1ecvj8k)ec8x( uh57vtvq p92 y When viewed from above, the current moves around the loop in a counterclockwise sense. What isv 5(9phoxkc/yevfy cqve8u 8)21h 7jt the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is5 8i6ep zuy3b igdwx4( the

  1 T is equivalent tobtj( gs.y*i 8u

  The direction of the force on a current-carrying wire in a magnetic field r9hz2ap m 4l8tis described by which of the fola lm4p 8th2z9rlowing?

  The force on a current-carrying wire in a m3 y4ig/m pmt.sagnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field u0 c /ph+.lasfk*w0 qeis equal to zero when

  A vertical wire carries a current straight upq+l*m)i ao9yqb s7s1e in a region where the magnetic field vector points due north. What is the direcqi7)as be om+1qys9* ltion of the resulting force on this current?

  A charged particle moves and experiences no magnetic force.farw1;0kp:i 1 wbk)tl5mbe, q From this we can conclude thatw 0m k1iqwlf)btk:e a1 ,rp5;b

  A charged particle moves with a constant 0t.c9dw/;lzm bmi k(i d6h;fms4 k4vfspeed through 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 maidmdctl/ m.;m4fk sf v6ki4 h 9b;(zw0ximum when the particle moves

  A charged particle moves across a constant magnetic field. The m7r,p7ygcut2 ncfe;m. t-x,wdagnetic force on this parti- cue.,t ;nm7,7f dxt2cg rwpycle

  A charged particle is injected into a uniform magnetic fi5wj,r xo +ga tofd55:8r7qnr veld such that its velocity vectorwn+ v5g :jtxd575,rrqf aoo 8r is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a cirk +p* j;gdp,fkioq) ,acular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circuld, p+;apk)q*gk,f jioar path would be

  A particle carrying a charge of +e trave yz9(a bmm:6f7pqj;utls in a circular path in a uniform magnetic field. If instead the particle carried a charge am tzb(7myf;j q96pu :of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward a)e1a6 t:f7ufu , ufa(/2yahu cuhue9xt speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts 6h/:u(xu u2ufea hf7)a 1t9yfuuaec , on it is

  An electron has an initial velocity to the ,oz u5e j)o:dy9em8 fpsouth but is observed to curve upward as the result of a magnetic field. The direcou op9mz:,d5fye 8j)etion of the magnetic field is

  An electron moving along the +x axis ent4i ay+nd8m0yljf 5me4ers a region where there 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, a84ldnf50ey4 jaiy m +mnd +z out of the page.)

  The magnetic field pr/dl m o0cjk+.coduced by a long straight current-carrying wire is

  At double the distance from a longx;rr+s(h/ uuf+ul5g r current-carrying wire, the strength of the magnetic field produced by that wire decreases/s uu+g+ (xrlrhfur5; to

  Two long parallel wires placed side-b/,zal a e 0k0qx p:mldvsqj-d/ 9gx33oy-side on a horizontal table carry identical size currents in opposite directions. Theq,3k3z -0 sxag9edljoq0 pm//lx:adv 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 wires placed side-by-side on a horizontal table carry i0ep7n, o gxa fe;g vu34yz gg+km7x3,fo;n6svdentical cur403 o vns7e;kv, eu,gpax37zf m +fgog; nyg6xrent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currenh5i od.pp asx. l4z3l9ts. The magnitude of the force between the wires is F. The current in each wire is now do lhdppoali x543s ..z9ubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves tov tbbj jb rgbqj2g4c58nt-(9e.r2w )hward the east alongside and just south of the wire. What is tt 8r bt-bqj9)vhg4 .gebcw2jrn2bj( 5he direction of the force on the proton?

  A wire lying in the p h t:vxcdov n)z2ky4.9lane of the page carries a current toward the bottom of the page. What is the di94tyndv.ok: xzc2vh) rection 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 side-by-side on a horizontal table. Ii,l,kpz9 d-g(wxrh z;f the wires carry current l ir zpx, k,g(-dzw;h9in the same direction,

  Two long parallel wires ares;+k +w 8.qr q7lfn )bh;qtisp placed side-by-side on a horizontal table. If the wires carry current in opposite directionqf wpi.qsr ;+tblk ;7n)h8s+ qs,

  Consider two current-carryin7dd6 dv2 h49oiwf+ lncg circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loh+wod4 lc 72n d96fivdop, the magnetic field at the center of the larger loop is

  Consider two current-carrying9( 2kk )catjgo circular loops. Both are made from 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 magnetic moment of the 2c)t9kg oak(jlarger loop is

  The maximum torque on a current carrying loop occurs when the angle bead r4hv)jf 69ktween the loodjv )h49kf6 arp's magnetic moment and the magnetic field vector is

  When placed askew in a magneticcg+z kzkz*vp;k (k 3)o field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment pkkv(zckz*)k +g;zo 3 vector

  What fundamental fact underlies the operation of l.wmwp;q l(+oea /;tfessentially all electric motors?wo m ef/p.wlq;+a;t(l

  A circular wire loop lies in a horizontal plane on af*ehw*2gf4d/hwev2qbn e -2o 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 h 4nv*w *bw qfgd22/fo-2ehe etable because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is 4gjey5myuj8e 7wu2 k7accelerated through a potential difference V and allow8ejy75kyum j4we u7g2 ed 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 through crossed eqyg2+(7.lkiof dh5k 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 thek o57k.qh(l g iy+e2fd 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 a.c g):e hgoj4-*b .romhyv)zme5.bq0.60 A is oriented parallel to a uniform magnetic fielm):.gob5h.v r*4qemjh)cg. ay obez-d of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a d4bjopgdtyv08y *-,qf3mqr +i irection 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 carryi3qrfx:x) sq; eng 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makq:;re qfx3 )xses an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass z+ bvw4l .iug3of 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 fo iz+wluvb.43g rce to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 6 l1*cc xk;bf uw*dm7nT. What is the magnitude of the magnetic fofdkc1nlu* x *;wc7 6mbrce 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 sm/e/d+d3m v4rs(zvj l(npg- 0 7oe3 pvrd p8wqpeed 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/9)dcn pop4 sqc *(qitf $5.0 \times 10^7 \; m/s$ 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 wi j0n 4i5x ex.*0gycf3 tb6gxflth 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 sph sd a1ugk : ylq-6:24g aff6kki*eg*peed 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 speed0/vr -dzd(lb v1 1nszy 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 -:-*zprdmalmb 0 qj:kof $3.0 \times 10^6 \; m/s$ 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-d rqfxi 0) -du+h+bjn5 A. What is the magnitude of the magnetic )r-bxu+q n0-h+dji fdfield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field au exe9m r ekx/*7 emv(z4:4xcv))amfwt the ground, 10 mu(wzx* )97)mvee: kr cexmf/4ea m4 xv away?

  How much current must flow 13qufc6uh ao-t: rn*mfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of ns y9eqqnl(67ed*ts, 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the *n sl6tyndeqq(,e7 9sEarth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in oppo:emlsm)*+ hc ;sglfdkr0s0 k4;kd2 v tsite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point thk ;+2cs4: fhltddvrs sglm 0)0;k*kmeat is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires czgi;p0 lq)x d za4:lh*arry currents of 20 A and 5.0 A in opposite directions. The wires are zp0l; xaz *:dig)qlh4separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry cur)tak/w/ azf+vch *za : p(flf6ki9c-hrents of 20 A and 5.0 A in opposite directions. The wires are sepaf6cla*(kafzw:+pk- /h tahv )9cfi/z rated 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 carry 2.0 A in the s 3viqey )71 4kcbik p,11xaokx,tw uk.ame direction. They are parallel to the z-axis, and buaick .y1ok)e1k i,, xpkvw13 q7tx4they 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 other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in tamsmttv5a-52 he opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two w v-ttas55 mma2ires.

  What is the magnetic field at the center of ) 5esqpvr4 ou0ngnaur;(g8h :a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the u ur(4gvn 0o g;) nhr8paq:s5ewire?

  A solenoid 20 cm long is wound +/r4mn-zwharqn;n fiv 4c3 5e with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flowrzeq 5nnwa;/nc hr34 +-fi m4vs?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Wmmt,t1:u6bl uby8xi iq) 1g4z8wuy h7 hat strength of magnetic field will it have at h uy118g6u t:bui bw,mq)yt7l i4 zx8mits center?

  How much current must pass through a 400i /z3m m4z1lgqx5y w3e turn coil 4.0 cm long to generate a 1.0-T magnetic field at the cen31qe 4 mm5gzywilx3z/ ter?

  How many turns should a 10-cm .ew/v 9 gxba.hlong 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 of 73clf,7 ccw1gqqlug1120 turns that carries 6.0 A if its dimensiggcl17w,qcqu7lc3 f1ons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fie*8sh o ;b6rk:2djfra z3v:pmrld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop :3omzr2pv6k*has :rr8fjd b; is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional arer+t;f0u+j 1ti)l zsvua $0.12 \; m^{2}$ 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 magneti o-:tkmn- va+2,qwros(8 ln e(-wv . dkncf(tbc field of 3.5 T. Thtfn--w(oq+, : (ntslcbow.nv 82m de ak(k vr-e loop 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 rad1.5sgk7c 1dm wqbjry (ius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whatqgr bk5m y7j1 1(.cdsw is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0xt.ke q6w/ c2m.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 m.2ex6t cqw/ktorque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of )oyt -)w4wmmgarea $0.25 \; m^{2}$ 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 eyv +pno8 h4nh4) 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 p5rrh7g7+q4bo ms3w04 szm s uvelocity $6.9 \times 10^6 \; m/s$ 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 potentiabwd)u /*ia h.ul of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radiusu*ai/u.hw )bd of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It entx9m f,,yr2 msxhn a1v,ers a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Detamy2v, s xf9,nm1hrx,ermine the radius of the path it follows.

  A beam of electrons is accelerw/485g ymjam2 fu - 8vc4lsisw xaj;u(ated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a valuev8j 2gwf(5/8i um uws m4yj;sc4a-la x of 0.010 T, what value of the E-field is required if the particles are to be undeflected?