If the north poles of two bar magnets are brought close to each other, the ma8g *h/rtj0le7 ug9sq c zpd6l3gnets will *09gezlugs8l h/ 6djt c7p3qr

  If the south pole of one bar mag(at(gu po. ciywb )u k)gx:d /f;f)bx5net is brought near the north pole of a second bar magnet, the two magnets )5t:.f)p g)gboaxyicbxkd( fu w(;u /will

  If a bar magnet is divided into two equal pc1ippyjbxbnf 6)- 8. pieces,

  The Earth's geographic North Pole is magw vb*4ygnyc4kx8:i3 88 bpa)hsp 8rfpnetically a

  The south pole of a magnet points towa .)exmh ve3t0v ww3eoy6;fdecx(gq ( 7rd the Earth's

  An electric current 5cx q)p wnew9ti7*zy*produces

  Which of the following is correct ir0wogm)od39?

  A vertical wire carries a current straight down. To the east of this wir7l .4 uwp8dxqc z5svw4e, the magnet 8wd.pquw5s lv7x4zc4 ic field points

  A horizontal wire carries a current straight toward you. From your po aeg9g ge0z) l()xmg6jint of view, the magnetic field caused by this currentege9 g(zl x)jgm)a6g0

  A current carrying loop of wire lies flat on a table top. yo2-zu)5.a:wr iiivr When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field cai ai- roi5)yv r:z2.wuused by this current, outside the loop? The magnetic field

  A current carrying circular loop of50yfjz gul6h 2l1n dm5;mgd.f 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 fm;flldu2 6gd gyjz5n1mh.50 by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is thk0j7z+fem) vs yb *8age

  1 T is equivalent to z94sdo1ikqqzm,n:9f d9c 4r y

  The direction of the force on a current-carrying mg1gb 1c6jo 6fwire in a magnetic field is described by which of thjg b1 f1omg66ce following?

  The force on a current-carrying wire in a ma(ga/u -m(c ojsgnetic field is the strongest when

  The force on a current-carrying wire in a magnetici9k;dy cp,x(.f yt1 qn field is equal to zero when

  A vertical wire carries a 9.df1 myjam g lzjw2zl682/wicurrent straight up in a region where the magnetic field vector points due nor .d9w62ygmjzlwf8mia 2z /1ljth. What is the direction of the resulting force on this current?

  A charged particle moves 8-mgkg)(ol dyh ( tr;uand experiences no magnetic force. From this we can concluo) dm -hgl( ;8rtky(gude that

  A charged particle moves with a cons,of65 mddebte(e2hd*df;oy1,/ ad vytant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upwardyod5day,o,dv de/* fm 1 ;(e2def6bht, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. edqi1tu/ z0g8u 5b kl* The magnetic force on ukb05zdt*8 /q li1egu this particle

  A charged particle is injected into a uniform magnetic field such tr,9 w9t evn998apv4dpph v do(hat its velocity vector is perpendicular to th4v8 9aovnewp dp,(99t pvdhr9e magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magnetix/2a/sp2 uhrposv76xvn0 4n h9sg4 v2nkgu w*c field. If the particle had been traveling twice as fast, the radius of the circular path would9x42wp2n n 2s//kvx0s4r 7 6nvugauo*g hvpsh be

  A particle carrying a charge of +e travels in a circular path in a uniform magne6*s/wmsn ,nhtyis/osg5sl ey 314/b ktic field. If instekio/ ,htbe1swgs354nny /6 y msl/ss*ad the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward atdl .ktb *hhy 2oj jpzaydle3k *zbmw/-;6p)2, speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts o;j 2l ohyp/zap b3 m- *tkhey.z2jd,dwkb)6*ln it is

  An electron has an initial velocity qj7)er:*d ;rjjq tb*i yw /s *dy;ysv5to the south but is observed to curve upward as the result of a magnetic5yvr;y)tdqj:s jq;d7i wsrjbye ***/ field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where the ,vcdlhth-,gyu83+k i re is a uniform magnetic field in the +y direction. What is thhkd- 8 3+ugic,ytl,hve 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 lowrpxs(;9sb)a v/ a3czw31 fl dng straight current-carrying wire is

  At double the distance from a long current-carrying wire, p5yw6v:pscma 6a *ro 6vz7wv 9the strength of the magnetic field p9 p7s6w v w:o*crvyzv5p6aa 6mroduced by that wire decreases to

  Two long parallel wiqfy,g 0vml :pedbnn 58nl :.q.res placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carrien,v5m: g :bfe8qn.yl. nl dq0ps 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 :sgq;m y/)ah 5iabn,zside-by-side on a horizontal table carry identical current str )gn az:m s/h,q;aiyb5aight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equljvc;8 jqt1xs37kjv ( al 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 jvq1lsjtvj(73 x8;kc wires?

  A long straight wire carries currylf3q.: 7jk22 s2rl*txfyh ch ent toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the fory7 tl c.fyl2:3hj xqfr*hks22ce on the proton?

  A wire lying in the plane of the page carmnqq lzo/ 9 k4413lpdrries a current toward the bottom of the page. What is the direction of the magnetic force it produces on1dll/ qkrmq4z49p3 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-side4 cwzo8z -gi)7sn1-bvtsijv e k(9sg- on a horizontal table. If the wires carr s- ov b- kesct7(i1g8-9g) 4wnzzsjivy current in the same direction,

  Two long parallel wire0fgsu1am*pglij- .)j s are placed side-by-side on a horizontal table. If the wires carry curren*gi.pj1gfmju0sl )a- t in opposite directions,

  Consider two current-carrying circular loopde-4s rcsdnr6 ;8eqv6s. 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 v-sc8e6 de rr d4;nq6smagnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-izp (q+e lfl0/carrying 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 tlp/0l qie+fz (he larger loop is

  The maximum torque on a cuu3 4 o/en)dkxs;wilu-rrent carrying loop occurs when the angle between the loop's magnetic moment and the magnetde/-xu43swo ) inu l;kic field vector is

  When placed askew in a magnetic field, a current x5 6h0y3xhbm8g r:fl jcarrying loop that is free to rotate in any directig8h x5 m06fryjx:lbh3on will experience a torque until its magnetic moment vector

  What fundamental fact underlies the oper gu5m k)yl5bbrw3z.6a ation of essentially all electric motors?k5mawbl 3 5u 6bgzry.)

  A circular wire loop lies in a hor6 2zxj gifapzl3fy40 iy o8jtl;v9)6tizontal plane on 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 the coil tends to lift off of the table because of tjfig6voji 49txzl0l)26atp ;38 yzy fhe torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a parti 4h qpij)i;h7whs :h7mtj* r5 j:xl1dncle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected5dj17 thn j ):h7lx:ipsh*m hwir;jq4 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,.a;higsl+ar + a:x2iocd zzi72a:bu 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 wilsg,ri++i:uich o;7a a2:az zbd.lax 2l 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 pckrgds mmo. hm hfh.e/v15/dob(7 a 31sddm- 4arallel to a uniform magnetic field-3c4m1mhddm(e sg5h o fds rdvbh7o/km.a1. / of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 k+a/qc6n+9 zd,cs3l5drv4 fnfefq* v A in 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 wire carrying 5.0 A when it is placed 32o9fmqg9g wzvv 2efi r, hhdgf m7x(cv64 *+xin a magnetic field of 0.02*2+iwg dv9c ,g9vfzmxq 7feho6v4 r2mf3xgh( 0 T? The wire 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 a magnetic fbadcx57elgbczn. 9 (;ield of 0.10 T. What minimum current in the rod is needed in order for the magnet.e7xdcacb59bg(;z n lic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field ofkvj3 . ( ja hnbqmc/m2r;6jdh9 0.20 T. What is the magnitude of the magrj29bj;hk/mqamjvh ( .c36ndnetic 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 igmeerytbvl ,e0x- vx4 -) 3p4of $5.0 \times 10^4 \; m/s$ 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 spetnas/++s3-qqx m)ur yxe m80ied 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 north *fk4z0;y4 v3qnlw5s xraxnp+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 witwivj7sk0d e4;+0hea 1dyg zr5zg5q; yh 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 hv.):wa3dxg3t. ok sir*h jg9speed 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 o/2lo3v,udu /) r,jt18 ep6y zjyx sifuf $3.0 \times 10^6 \; m/s$ 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. 9;r8cex4vdb -l .lslfhs 9h0sWhat is the magnitude of t0s;ssdfcl4 .8l9 re hb9h-lvxhe magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magne hkjgr ebi r*r zr61/q3 xg;1iga2y2b/tic field at the ground, 10 m aw yr rgg 2*e631kzqxi/rj bgh2bi;r/a1 ay?

  How much current must flow for;66qb uxlsl,6z x+zow a)wku6 $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of b4-;r93yds9z at odza5.0 A is the magnitude of the magnetic field due to the wire zt4;adoydr-99s z a3bequal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cur8y:d.d):ehvyn)vmtd os 7 )bh.n +bfzrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm frohonv yz. dbdhb.v) : :e8f sd)7tm)ny+m the other?

  Two long parallel wires carry currents 4eiqt+cpoz.9 of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwotqi+z.c e p49ay between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opp.serx4a8m+ pj k- pj5qosite directions. The wires are separated by 0.20 m. At what point between the xq4k j.-e5p+r8spajmtwo wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the fp7n+wju r1 p :s,hnqa+eb18 i;gq(rosame 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 experience due to 1 u p1 r7bsq(;+w jhagf:n8po,rniq +ethe other wires?

  Two long parallel wires carry currents o1zwzk1w*+cblc wqx6ck + 3r;2y,imx2 kns :j xf 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per m+qk c*1i3bw2+2xlxzzr sc wxj;n:k y 6c1k,wunit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire ofk2ca8 ab(legf4v 6h(e a1io+j radius 4.0 cm when a current of lof+jaa( 6biackee 218v(4hg2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fieldq ;+vhj+c ryxce3(- +it*ns wb is produced at the center of the solenoid when a current of 10 A f++ ;3wrn -scqhy(t+cx*ie vbjlows?

  A solenoid with 500 turns is 0.10 m long and carries a current ojqy* )vc+cj af0a/c 0nf 4.0 A. What strength of magnetic field will it have at its center?qyja0/*cfnc0v+j )ca

  How much current must pass through yw(p7;b3 iruma 400 turn coil 4.0 cm long to generate a 1.0-T ma3bymw 7p; r(iugnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate a 3s 6 nrj* zlmc*k40jcw$1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loo3v9zdt 5(j3ekd3qlm:mxq8 ms 9,fz bkp of 120 turns that carries 6.0 A if its dik9f5j98qtsbmzklqzx 33(d3: v dem,m mensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform*d2cj3i j: gr)ps bv(h magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the v g:)i(dr b2pj* sj3chmagnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional 4az: i*b-,eczpb .qwl 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 carrou,v./ojnui:xa; f 4lying a current of 2.0 A is in a magnetic field of 3.5 T. The lonvjau oo.xi4;f,/:ul op 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 wurj)6 *m;tldnx :6wi1td oen 4ire of radius 0.50 m is in a uniform magnetic field of 0.30 T. 4 66mx enrdntuiol;1)*wj t:d The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m i1d:be-,m esjxfr 4:q vs 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 the,dejvx b:m 1f-:s4qer magnetic field?

  A circular wire loop of area0*tuv2e :-2xyc gxbno $0.25 \; m^{2}$ 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-charge oq1sdv:7nvz02bo2 5dd3cpl jd particle (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 velohor9 a,x z e,oah,vn8 /7vq0lpcity $6.9 \times 10^6 \; m/s$ 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 magv wo1q pi7x7zn.n1v+qnetic field of 0.040 T. What i q1pizwvx17 qn+n.o7vs the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters /)qzh zk-xyg 6s6kjr0 ,rw2yq a magnetic field of 0.30 T oriented perpendicular to its direction of motiojx2/y0z, g s6w)zyrq-hqkk 6rn. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befs aa:n;2 ;dqxdore entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of t dns2a:daxq;; he E-field is required if the particles are to be undeflected?