If the north poles of two bar magnets are brought close to each othpgu k:gcm3mlrd4i49 qr d-2;rer, the magnets wiru-9rml ;4 c2gqd3rpgk: id 4mll

  If the south pole of one bar magnet is brought near the north pole or* fv -ov768 qnvwn9oif a second bar magnet, the two magnets orw v7nv fi8n9*-ovq6 will

  If a bar magnet is divided ine ( 9 s 9pzyq2jjctdbi,h2vmv; i(7k:fto two equal pieces,

  The Earth's geographichar6rc* 1zb m6 North Pole is magnetically a

  The south pole of a magnet points toward the Earth'sj h5w z6q/zl rih :gc521mjh0i

  An electric current prod qosthwkuqsq29 5*/3nuces

  Which of the following )b.a832c toathrvb k*is correct?

  A vertical wire carries a current straight down. To the east of this wire, the 55mq +.6aqnag c,e cji5.cm+iegj 6a, aq5n cqmagnetic field points

  A horizontal wire carries a current straight toward you.c 8t f;*m8mu p2dkr 5yzk+pl+l From your point of view, the magnetic fie 8pr+fk;k5 *mz2p8d lltcyum+ld caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed froi /ofqiwny wlc s 77t;t*2-ye2m above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this cucno-7y t li/;q7*ie st2y2fwwrrent, outside the loop? The magnetic field

  A current carrying circular lf2zwic 3o l1/uoop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise senoc2zfiluw/3 1se. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fietw 7*:innk 0b-w3mlue+ d mu*lld is the

  1 T is equivalent tojgk(iz jlp ; -+-lqma-

  The direction of the force on a cur .*ulxm1mdfwx; 0b;fq rent-carrying wire in a magnetic field is described by whichlqd1f* fum;x x. ;b0wm of the following?

  The force on a current-carrying wire in a magnetic field is the sfcv wq usu ygu:(qd))p)a 27g b;88hvitrongest when

  The force on a current-carrying wire in a magnetiwoc82ex 0ma4c7 hkf7dc field is equal to zero when

  A vertical wire carries a current straight up in a region where t- et ypgcqxd.er86 q a.z1w00ahe magnetic field vector poiex 16q de-qzcayp.8.0agrw0t nts due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences nkgz+9;*obedp d 25kt4gv jb0 ro magnetic force. From this we can conclu0j d r9vg eg;*zp2bkt5+ odbk4de that

  A charged particle moves with a constant speed through a region where a unif+f7 tyv6 net(corm magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when thet+ ctv(67 yfen particle moves

  A charged particle moves across a constant magnetic fiey:k t0m 90cutd9pp;tfld. The magnetic force on this particu;kppmd99 c0: yfttt0le

  A charged particle is injected into a uniform magnetic field6ahji8z ,.mx a such that its velocity vector is perpendicular to the mja m, i.6hxaz8agnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular 6cyr;e9t av4w ttii2q0)yml - path in a uniform magnetic field. If vc 9t;yw)42ymt laqi-et6r0i the 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 circular path in a vk1wwnkt6 z 39uniform magnetic field. wvkz1 nk6 tw39If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, qmf s9)pg9f6vw8vi 5kan electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force thatpw9)fiq m5vs6g9k 8vf acts on it is

  An electron has an initial velocity to the so-jcvs- o:(ze outh but is observed to curve upward as the result of a magnetic field. The direction -( sc-vj:zo eoof the magnetic field is

  An electron moving along the +x axis enters a rdfbb--xuj .x 4f2cfi)egion 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, and + fbj dubfix-.-f)x42cz out of the page.)

  The magnetic field produced by a long straight hl29hw k0t:(q) lqqa vcurrent-carrying wire is

  At double the distance from a long current-caxz of12j )dgek0s4po3 bk(x ak50)a ibrrying wire, the strength of the magnetic field produk4gaa)kijpfxk z3o0 5 o x)s2bed10b(ced by that wire decreases to

  Two long parallel wires plaz)m/ xd2* ptjuced side-by-side on a horizontal table carry identical size currents in opposite direct/dxt*)zump 2j ions. 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 rda)xc we5/0x a horizontal table carry identical current straight towar0) wxcar 5xed/d you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal curren: ur q(zsj4znho)/ jf;ts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the ne )sruj 4:n;zqz(/ojfh w force between the two wires?

  A long straight wire carries current tow6yfhob)1 :-xf8a)h0gmcv n3;h kapw dard the east. A proton moves toward the east alongside and just south of the xm )g-8n3a hwbyf: hc06opv f)a;dkh 1wire. What is the direction of the force on the proton?

  A wire lying in the plane of5ep0ouf8lmc jhg()2ck jda9; the page carries a current 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 the page, from your righaoh8 )e2lcm ; p(0fuc9jdkjg5t?

  Two long parallel wires are pla8j )a2gtnk2k0ni0se zced side-by-side on a horizontal table. If the wires carry0gn2k8ektnia 0 2j s)z current in the same direction,

  Two long parallel wires arj j(djy7 s *wzjlnaw td(-tq1k5y)8* ae placed side-by-side on a horizontal table. If the wires carry current in opposite directizy7-*jyjdj k*8(a nljd5 aq()t wt1wsons,

  Consider two current-cartn25je .u zzk/k(t w 5l5cp yn6z6wn+zrying circular loops. Both are made from one strand of wire and both cart 2kzzn5w w.(z/n ckn5 zyj+l6t65 uepry 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 larger loop is

  Consider two current-carrying circular loops. Both arxgsmz 5b ,:z.e1i0sv ke 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 smallerz igmxkz:v,5es s0. 1b loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs whenelx0p plolf)jb 6.n68 the angle between the loop's magnetic moment and the magnetic field vecto8pl ) nj6beol0 f.p6lxr is

  When placed askew inf d-+,z2eb/akccd+1ph :b aa e a magnetic field, a current carrying loop that is free to rotate in anya :ad+/ +ke-dah b ,p1z2ebcfc direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric moto 6l8 cj/zt3gdq. n2mnwrs/q.628 l gnj3wz mntdc?

  A circular wire loop lies in a horizontal plane on a table ant2 w b-oz9guzx.7ev5t kfm2 0ud carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field poin5f vw2.b zmxu7-e902 tug tokzts 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 interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated t(ri- u qg9uo spuqkt;d:z4 0k1hrough 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 orienu q1 :;sugu9 rd-i0toqzk (4pkted 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 5myssiq8 lp 5-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 nort p y5s5l-sqi8mh. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a u1os0:(,vcp 2hnaxmt u niform magnetic field h np0:21ac ,xtvs(oumof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direvo. bb8s f*7zxck)5v vction 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 carrying 5.0 A when it is plac-2ix npcnej/tqr 8; 4fed in a magnetic field of 0.020 T? The wire makes an pr8;-4tnqic jex 2n/fangle 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 ism-15cgg pu efme:o: it:g qp2, in a magnetic field of 0.10 T. What minimum current in the rod imgpi u :p,-m2gg:t5co 1f eqe:s needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetu.ze h.x54k cqic field of 0.20 T. What is the magnitude keqx.4h c5.uzof 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 with a speed o uv5x uwi/s1g+f $5.0 \times 10^4 \; m/s$ 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 spee3m wqvn.un 1q:d 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 travelin;d( j sfk,q)e5;a +yhalzx7u,o9n bk gg due north 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 win.5(n gpcpurwt s 118rth 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 with a /wnqnvly k/*fnd6 l(;z y f42yspeed 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 kr*v3 b-ct q2tof $3.0 \times 10^6 \; m/s$ 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 magnit)yfcfj2.kst y:x8- wrude of the magnetic field at a dist)t-y r.jkc yf2sx:8w fance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what ma+wjhfyn+b;6 q gnetic field at the ground, 10 nhyq6 f+ ;bw+jm away?

  How much current must flow foz)awkp g-e1( :a;5xm.je*g eywo )ib 93xgr shr $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current ofr w90ythkl1n, 5.0 A is the magnitude of the magnetic field due to the wire equal to thw 90nrhkl1, tye strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires car+( szsv(cqw hfe*vui-cc77 9bc33 mzery currents of 10 A in opposite directions. They are separated by 40 cmz+qsevbhs (i c73 mzvu* 3c(wc-e9f7c. 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 carr (u4iv8earp 1 abm-oi4y currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. im44p8 iaoea- rvub1(What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of j o :hct3o1mm e;vd.2x20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contribuhdtj mom1:ec23x.v;o tions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are paralha8yp88n m8e blel 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 thena8 8 hy8bemp8 wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direhie ei2 vl (752xij2izction. The wires are separated by 0.30 m. Find the magnetic force per unit length bet5ex22i 7ijzh2(evi li ween the two wires.

  What is the magnetic field at the center of a circular loop of wire of radiusj v(xo. s-c)15pc 6roj ityv4id k4qb* 4.0 cm when a current of 2.0 A flows in the wirei jp6jts cyovv) x(oc5-4 r 1*i.k4bdq?

  A solenoid 20 cm long is wound with 5000 turjyrk2j442q a8va+vk uj jkj; (ns of wire. What magnetic field is produced at the j8avk;jy( v2ja4jq2k4uj+k rcenter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Whad;* h(ja ma,ol iw+,skt strength of magnetic field will it have at its center? m,ok,daij+ asl;w*h(

  How much current must pass throughzr69rlzc7 n) 3/bsazd a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field 9ad 7nr6 bzc 3z/r)lszat the center?

  How many turns should t/zh o:k u+v(oa 10-cm long 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 120 turns j e*wu5 d3i,4rvb6ofw9 wvc q;that carries 6.0 A if its dimension96 q4wj*vo; icw d5b veruf3,ws are 4.0 cm x 8.0 cm?

  A circular loop of wiftxp(q5-n4 gpre of radius 0.50 m is in a uniform magnetic field of 0.30 T. Thepf p-5(g 4nxtq 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 area dpgey0 /ktp o)h+x(f7$0.12 \; m^{2}$ 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 curren3q+2zm upyhhlz0 3 zs+t of 2.0 A is in a magnetic field of 3.5 T. The loop halu y0zh3+zz p3 msh2+qs 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 mapg6urtldl* u;a*jrld3 n9*ec4 xg;6cgnetic 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 dlxg;tp6dl c*9*c;rn46u e* gaj3rulparallel to the magnetic field?

  A circular loop of wire of radius 0.5aggwlh/,7s ( s0 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 parallel to twgss/ ag7(lh, he magnetic field?

  A circular wire loop of areiu(d0 k1vp uos3z8p dh20rs j(a $0.25 \; m^{2}$ 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 a5cjg18c/q c7 1cs bcigwj1tp* 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 velocutpmb 8+oj ff -;h.r av*o1/dfity $6.9 \times 10^6 \; m/s$ 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 magnedtyi(9 ag 65imr0 g h(ebx/0yhtic field of 0.hmh y(60g9adey t/50(xgii b r040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V.dq8h.iaficzks n *p+ 8l2n5 e- It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the n+a iq2s-8l e5cip* .hk8z fndradius of the path it follows.

  A beam of electrons is accelerated through a potentiaru s-24)t5 erfdvk gk0t*(oi dl difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 te(4r)5vdfk o 0gs-*2ti rk duT, what value of the E-field is required if the particles are to be undeflected?