If the north poles of tu2 de. ztvk.vux zmq63:fz*8pwo bar magnets are brought close to each other, the magnets 2pvuz8mzv. : .u6 3 fdtxqk*ezwill

  If the south pole of one bar magnet is brought near the north pole of a sec, ttbi61;kf:aboykh (ond bark 6a: ;ib k,yftt1bho( magnet, the two magnets will

  If a bar magnet is divided into two equal piecn4* q*dpx2xs p(q4af1imkqs ;es,

  The Earth's geographic North Pole is magnetc 4zf(s 1h nv-t3uxo;0datd) gically a

  The south pole of a magnet points towahcoa0b8-tdfd (l/bq 1rd the Earth's

  An electric current rj/v) ufa(:2tpg d*x xproduces

  Which of the following is g1c-6 2ff ed.qeajbccfe; f3 ;u0*mb wcorrect?

  A vertical wire carries a current straightw*- hmw25 dfzq/f1 lfjy* h sb:e8jmx4 down. To the east of this wire, the magnetic fz d2*mbqexwlw4-y1h fs m f8 f/5j:jh*ield points

  A horizontal wire carries a current strrbw4p)8 :ifx f p;,uocaight toward you. From your point of view, the magnetic field caused by this fw xfpc uirb4o;8p,:)current

  A current carrying loop of wire lies flat on a table top. When viewed from abov,dn)gut- sd y1e, the 1dnu g-t) sdy,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 field

  A current carrying cq1-v; wt o60v:nzsgwqtf/y .wircular loop of wire lies flat on a table top. When viewed from above, the current mowgo:qww t0q/16tv.n v-y; fsz ves 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.d ;fy1r4x6 eoh8 wbra is the

  1 T is equivalent toa tqa v33 gsp346ngdj-

  The direction of the force on a current-carrying wire in a magnetic field is deiqfq qv-9(l :uey:7thscribed by which of theyfq:q9ht(lu7: ieq v - following?

  The force on a current-carrying wire in a magneti/,i.cdxtht* 1bt ri6 ic field is the strongest when

  The force on a current-carrying wire2s oazc+yw9a. in a magnetic field is equal to zero when

  A vertical wire carries a current straight up(e (m yw s58eq,jgk.-m-jy9pc mvsd nk)(iw8 u in a region where the magnetic field vector points due north. What is the direction of the resuvsk jdmy(m(p8n- -(i sw,q58. euw)j kyecg9 mlting force on this current?

  A charged particle moves and experiences no magnetic force. From thi:w f 6ac5z +*cuxrok+ls we can conclud++5a czr lfxc*ow6k: ue that

  A charged particle moves with a cb /*cok1jop5l6j won)q; lj:u onstant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle wil pq jl5:jloconj*1o 6b;k)/w ul be maximum when the particle moves

  A charged particle moves acrowsa q57b:m kj no,)f5tss a constant magnetic field. The magnetic force on this m7k, onq5t sfjb:a)5wparticle

  A charged particle is injecuke r yv86h5fq03f9qkted into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the par v5r3fke 80 u9qhyqk6fticle's weight, the particle will

  A charged particle is observed traveling in a circular path in a unifnv+nkt( u++ ec/l/ 2jka/vjtxorm magnetic field. If ttk/lvxj n/a tu (/j+2vne++kche particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circularyz7;trooj4q/+ rt wb tmq,g56 path in a uniform magnetic field. If instead the particle carried a charwt+r 6,jgq7t5or z q/t;yob 4mge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a unifoeb c.1pl omj17k4 6ybqrm magnetic field that is directed straight downward. The magnetic force that ac4 p1yq 61kmeb7ljob. cts on it is

  An electron has an initial velocity to the south but is observed to curve u7utge .8 vfcs12q mxs9lo1fo-pward as the result of a magnetic field. The direc1fv tu 7 cos2om-19.lqxf ge8stion of the magnetic field is

  An electron moving along the +x axis (pdf qz 5 bnr3t ;dl7;vo:np0eenters a region where there is a uniform magnetic field in the +y direction. What is tdfoz3bn(7;r0ldep ; t:q5p vnhe 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 straight curre k;tky c)vo.kxy85)rqnt-carrying wire is

  At double the distance from q3ic9k y(bm9b:5sy oxa long current-carrying wire, the strength of the magnetic field probxs:y y9(o59bm iqc3kduced by that wire decreases to

  Two long parallel wires pkw x kkud0n(3fmf7q7* laced side-by-side on a horizontal table carry identical size 3ff km *7dwn (7q0kkxucurrents 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 magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizonthe.+*-jxzkhc al table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between th+- kjexz *c.hhe two wires

  Two long parallel wires carry equal currents. The magnitude o+ranl e rk:x;f5 sud53f the force between the a+;5lfr3 n:u5e skrxdwires 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. f+hp1ot)ery2 A proton moves toward the east alongside and just south of thhf+y 21ropet) e wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a cu3 jg dnb79alv6rrent toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly t3dbjnl 7ga v96oward 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. If the w7mz2/0agql. b lryqy5 q m2qzr57ly/b y.0 aglires carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table /sqg5)s4-unmnc z z8i. If the wires carry current in opposite direczns8s/4i gc nzqm5 -)utions,

  Consider two current-carrying circular loops. hol +8n d4lsb -s:xpvcv gy-5qto62 8jBoth 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 loop, the magnetic field at the center of the laoq8b-8 sg 65lo4txl:pnvh2ys- j vc +drger loop is

  Consider two current-carrying circular loops. Both are made from one obsz7y3q o3;g 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 largy q;3g 7zosob3er loop is

  The maximum torque on a current carrying loop occurs when the angle betr 0af a,*mr208*awvuu5 ruumeween the loo5auwu8r*,e 0ua2 0 rmmafvru*p's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a curren5,yjclv flj6 bn*u aq6x+i+:x t carrying loop that is free to rotate in any direction will experience a torque until its magnetic momenti 5 u*xl +axqblfcj+6yv,6:jn vector

  What fundamental fact underlies the operationycc8 cn) -bt rj8zbu.1 of essentially all electric motors?j8ty8.1ub-b ) ccz crn

  A circular wire loop lies in a horizontal plane on a table and carriesk/r1kuq 7,kea 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,qkk1uar k7/e 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 accelerated thro n:6)zg( ydifyugh 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 oriei )zf(n:gyd6y nted 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 passinaknkps 485/ lkt*)ervg through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velo nt r kek)5l8*kps/va4city 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 orient7e7*kczxjbzmz;61pq)eo d 60wfl 8 nxed parallel to a uniform magneq xez p 0)bc l8kxd66jz*7m7ozef ;1wntic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in b(hp8-hoxcc yt 1z s-c y;1j8ka 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 p)32mry yh xih6pfu46 wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle 466 r)umy3fpx h2piyh 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 fieldo a9(/rabz9s mrb )nzajv0m *) of 0.10 T. What s9a0/ mzb))rzoa*ma (vrb9jnminimum 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 0.20 T. What is the magkd 9f 35w9ltg 0yp:i5 z)jt dv,c9cetunitude of the magnetic force on the 0cvdj9g cl5kiy3u9zp:9tf )5 wtdt,eproton?

  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 sp wq)ls ,eb*zm9lo+d0zka:v r- eed 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-uuei .:znu p* 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 nordbuu ; h nlu+ed:e+8-vth 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 wi 5bt2qwl19qdqth 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 magnetic force of the electron.

  An electron moves wiiu(b4b vrk- n9r7 qd3qth 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 speed ofdxxc+x.q16 e nm+6n* 2md* dke:flriy $3.0 \times 10^6 \; m/s$ 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 mau;pb jed.mph4nt7,6kgnitude of the magnetic field at a distance of ,hu;.k7dpmt46n epjb 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at g+)i snk-)-xp jmzwj: the ground, 10 m anjs)j-p +:ki wz)g -xmway?

  How much current mustr3wcltl9h*86-ovx gvw 1xo *v flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of loy-. qlo*: ,qa dwj1 ,tpy0dp5.0 A is the magnitude of the magnetic field due to the wire equal to the.y* ,: to 1,oyp-pqjlq0ddwal strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A ix(n2 yqs 7c 4ir5azfcd d,1j q7gg)gfz6k*8pvn opposite directions. They are separated by 40 cm.q2xcid (7p y7z)qa5fsdng 8k6* g1z vj,fcg r4 What is 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 currents of 20 A and 5.0 xjt:o7o (edw+r6f+/q z1kc bm A in opposite directions. The wires are separated by 0.20 m. What is the magnetizr mo1j:dx fo76+b e(/qwtck+c field midway between the two wires?

  Two long parallel wires carry currents off927/smozs6bz k*)jh n ds 8ix 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. Atsh/*jiksmx )2zno89f6b z7sd what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2l+a3hi;9 sive b2gfb 6qe*)xk.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of bvl*i923gfb)aehxk+q 6s e i;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 curre h2+.tqpr4lycu x8 u3knts of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic forcq38 4y2.krph+cxlutue per unit length between the two wires.

  What is the magnetic field at the ce3vl)tal:y ka -hvpi92 nter of a circular loop of wire of radius 4.0 cm whenkalv)3lh- t 9 2apvi:y a current of 2.0 A flows in the wire?

  A solenoid 20 cm longb sk z02 sb.byne*r:l,a+x7 sd is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flows?lxyad0,b 2sr7 +bbkz : sne*s.

  A solenoid with 500 turns is 0.10 m long and8s 3xruods 2;gq.1ydv carries a current of 4.0 A. What strength of magnetic field wi8 rsd xg;3vd.1usy2 oqll it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generu:xya5cc-ibgk n( 86 xate a 1.0-T magnetic field at the8i5g an-cx(6kb uy:c x center?

  How many turns should a 10-cm long solenoid have if it is to genezpw.6/hw chj h:0krv8 rate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular r.h1r pxta+ o,d(njj +;ano pavi))-r p :,ikkloop of 120 turns that carries 6.0 A if its dp)viaod-ta p + i., hx1a,nj o(pkrj+rrk ;)n:imensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform masp+f6ixg rqp0* z5o g2gnetic field of 0.30 T.rgqpxgfi25so*0+6 p z The 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-sectional ar duyfy.k g0 xvi4i thi:0j70n3ea $0.12 \; m^{2}$ 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 babcph m*,01 qa magnetic field of 3.5 T. The loop has an area pbc bq*,h 10maof $0.12 \; m^{2}$ 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 ohb;b1d54 h,a . nh* nr4fukktff 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when t4nh4 *u5tadhbfbr.1; kh,kn fhe plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radigvimykjh;,s f+ /9u*n)z j0mn us 0.50 m is in a uniform magnetic field of 0.30 T. The current in th+*zi) syf,mv njgj /k0nu ;9mhe 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 kbeyx jd0xi .z sb 3n3kyaa-o)x o--,kze:f;; $0.25 \; m^{2}$ 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) hah w92cpo*fo+ us 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 velocityw* ay+uq- 3mjeg/hqbdaina50g5) g c 7 $6.9 \times 10^6 \; m/s$ 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 kVw:6gwn -uop 72/ fg d;whyj4o +71ik-h ujmphe and then moves into a magnetic field of 0.040 T. What is the radiw4u;2wfpok he:-7n6pijy g hdh-u1m+w gjo/ 7us of the proton's resulting orbit?

  A proton is accelerated from rest through 500b f7vusq gva9de00l ,5 V. It enters a magnetic field of 0.30 T oriented perpendicular to its di f b00suvl5ae,7qgvd9rection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differencecu k(r/ik+;m/io 33 zw(v uiyk of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a val v3ii kc mkr(yow;uu3zik+// (ue of 0.010 T, what value of the E-field is required if the particles are to be undeflected?