If the north poles of two bar magnets are brought dlr2dd2 mg6( c5-e;g wkg6cn dclose to each other, the magnetsg6d c 2 5-mnkd6ge; (wc2gdrld will

  If the south pole of one bar magnet is briv(yi:q2u k0pought near the north pole of a second bar magi vu2 :(yip0kqnet, the two magnets will

  If a bar magnet is divided into two 62)wukcqe(k;7in xzu hlzu5 2equal pieces,

  The Earth's geographic North Po 6j*,8y iuqq sqj3d2fjle is magnetically a

  The south pole of a magnet points toward t)w5)(x0 g x:1puk x6cprdkiio he Earth's

  An electric current prodh-76 -zqybmpa2w; yfhuces

  Which of the followinx(xs)*6ueip -gp2sb (bt wg( kg is correct?

  A vertical wire carries a current straight down. To the east of this wirxgm4v5 lfq ;e/; xy7f+p)tpd he, the magnetic field point g75d4mvqe /lyxx+)p p ;f;thfs

  A horizontal wire carries a current straight toward you. tlij:u ax:o4+ pf,6sf) mzs4j From your point of view, thesi: +ztpmf4f, s)4 uax:j6o lj magnetic field caused by this current

  A current carrying loop of wire lies flat on a 2iwh3nfb /q9ff*l3hamh ) x l3table top. When viewed from abovw3n afmh*)h332qxhilffl9 /be, 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 field

  A current carrying circular loop of wire, ixpxn;+yw5b/ 0exx x mm6c 54wr1sgt 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/ie0,t;x4rxmwx yspnxm5c b5g+x16w field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is 6ktk hds)r1 ld1:3ld.ppuje0the

  1 T is equivalent toh )m+piw+-mjo

  The direction of the f 8 v;:h8t br1imp9ibxyorce on a current-carrying wire in a magnetic field is described by which of the fb v1bmp y 8t;:ihi98xrollowing?

  The force on a current-carrying wire in a magne s1e,xpq79vx5 1lwar etic field is the strongest when

  The force on a current-carrying wire in a magneti7ycp6x ur6 4njc field is equal to zero when

  A vertical wire carries a current strairev e2vz s6*yw9: mdu4ght up in a region where the magnetic field vector points due north. What is t 9e2 rse*uv4z6 :dmwvyhe direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic 3rw.b+tt4,vj gd/ jlkforce. From this we can concl d tj.g,j4t+/b3wlkvrude that

  A charged particle moves with a con n9sj e-so0m,ustant 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 will be maximum when the psse9 -jnm u0o,article moves

  A charged particle moves across a constant magnetic ssbbdf7 rfn(035t0db field. The magnetic force on thir(0f7 db ndfs35 btbs0s particle

  A charged particle is injected into a uniform mag; l o /cpw.ao7qj.enf.netic field such that its veloc. olfj;n.poc7e/.a qwity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a cb,2/bta+ orx:c8ehtt bl;+b3fvl m8d 9vpc.r ircular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would b,cttl he8+32mc: b +x89b vvr bp b;otlradf./e

  A particle carrying a charge of +e travels in s*:d zg vf1c c+v/hq2m9cmi k7a circular path in a uniform magnetic field. If instead the par*viqccv: +/zhf mm 9 ks7dc2g1ticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform magalw 82uvl/dv(lqtz1e q3,du p *+ hzo4netic field that is directel * dz ,dhavuu+qel low(4 318zvpq/t2d straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cud/5jw.1(quv h sai6-ujqpug0 l py,8 qrve upward as the result of a maq hy w,us8ua1p5 /j0.ud-( vpqi6glqjgnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region wsolg 5cf*2 /pct71 cdthere there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right,cgft2pts *1/l7 co5cd +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying5arig,n 0d0agz -+upw wire is

  At double the distance from a long current-carryingp,j7( w9wgzir wire, the strength of the magnetic field produced b, (iw79rp wzgjy that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tlo,*qwb0 qm1/q zmb(lg(y -fnable carry identical size currents 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 mag0/zynq,w 1b- mqlqf bg(l*(monetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry idy(yshnv-js0 5dst5 f3entical current hy n0 d t55s(-yssf3vjstraight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires wxjrus:i +3mk yi- 3pob2:i8wcarry equal currents. The magnitude of the force between the wires is F. The current -m3rxs iu: yi +wj bpi:kwo328in 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. A a,mt3xafm6(o proton moves toward the east alongside and just south of the wire. What is the direc6m ,m(t3 oxfaation of the force on the proton?

  A wire lying in the plane of the page carries a current+4t9 pd5rsfzog 4f. uv toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpenv5.ofp4s4 tg+9 drfzudicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are plac8 lb;.8yz7oz pxf34lja (abuged side-by-side on a horizontal table. If the wires carry current in the same direla;4x z bfp. lz883ug7jbay(o ction,

  Two long parallel wires are placed side-by-side on a horizontal table. If t-y kl 5*m62i+ u if1jir;z,g4n -xqrkyv:oot the wi;ktl xf*zmur-,j:452rity + oq1og 6k-y ivnires carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one stracbbk ig0*s i88b l+wa:hrn 11ind of wire and both carry the same current, but brkni iiw 81bb1* 8c: gh0sla+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 circul7r(rob7l pxruo jzg. 7 4geq3h no c14h72,iotar 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 largeg jr7onozl7pq. togh74ho 4e1(7,3ric2 uxr br loop is

  The maximum torque on a current carrying loop occursi1x+qq(ou/ xf when the angle between the loop's magnxui1ox/(+ qq fetic moment and the magnetic field vector is

  When placed askew in a magnetic field*g9edrhe; ;k ns 7e/iu, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment v*ede eu grn9hs k;/;i7ector

  What fundamental fact underlies the operation of essentially all *tdxb( utn,5b 3 i(cmbelectric motors?*in(btdmcb5 ubt (3 x,

  A circular wire loop lies in a horizontal plane on a table and carries curre;rt/h 4aivk ;r--ws (t6uku jt2ft i7bnt 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 torque caused by the cuwfu --ist k2k6utr / 4h;;(rt7jb avitrrents interaction with the magnetic field?

  In a mass spectrometl5v flb- l-wt g 7*8rt;c giz9u*k2wqyer a particle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circularwyb*f2uic* tv g;rk l9g-5 z-t7l wql8 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 yt q3f/ bu4v/ge0u* fcconsists 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 f/tbf/q3yv4* gceu u 0selector, 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 awlsb3/5a ;erparallel to a uniform magner3l;s /a5awb etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A ykb3cl47:z c*ds8gmhye4-fs h m/q. din 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 5gp.t r)wcc s(1a9mp:o.0 A when it is placed in a magnetic field of 0.020 T? The wire makes 9m.so1wp car)(tg: cp 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 crn3e,e w -8:k :qsr37sggtuvis in a magnetic field of 0.10 T. tvcs -,kw3rqg re83:gu7 esn:What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is inu:6pam .bvfd ;cj.r *m/no9vhu p/r9l a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proto/mfhu vpjplb;ra n/*9 o6mrvc:. u9d.n?

  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 of e( pol+p0w mnq+59 cto$5.0 \times 10^4 \; m/s$ 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 speedrw xifmwz or,b:*if02ad(or pv8 /) 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 traveling due north withec4ob1kh 89f5 8pxv/ss lkb :f 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 sv;9gha h jv7 yqw2+b8speed 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 spcs y (d7bjidk;myq,zuy2 )x9 6eed 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 of7a3zku n 0:uro $3.0 \times 10^6 \; m/s$ 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 dh-cp yfn+5 y8is the magnitude of the magnetic field at a distance dp- 5 yf+hy8cnof 0.15 m from the wire?

  A high power line carrying 1000 A generates whtal+ /w 0n+gdoat magnetic field at the ground, 10 m awayal++ o wdg/n0t?

  How much current must flow z0y , t+dvbro/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 5.0 A is the igss2b ut- )) af)b/1r2xkwsj/pttr;iq1au/magnitude x;ik)pa /trui1b-qt))bwa 2 /srj/ust2fs g1of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They *h5qn:l3dlyuz0/pj n*3d z cq are separated by 40 cm. nl:hyj*pu35d/ 0ndqcz*z3 q l 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 A g6 y9vzgw/9oiin opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwyg/o6g v i9zw9ay between the two wires?

  Two long parallel wirng;+8bn)*(xomc o tbb es carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point benng+8)tc*o (b mo;bbx tween the two wires are the contributions from the two wires the same?

  Four long parallel wires esb e3muw/b ny.i3xa3wzr7p 5nk2 .j x7ach carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through tk sxju2bnbyz5/ 7nriex. w 33.3 7mapwhe 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 hj zud1)(w/zz; *l8fgi/s5fy9i e xqw8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit *ifg95es w(q8uzw z)yf/1lhdi/z x;jlength between the two wires.

  What is the magnetic field at the ce q,ial qcqt7(2nter of a circular loop of wire of radius 4.0 cm qi,c72la(qtqwhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns o2i-3za3 n7n;r-wblkuq + vd vlf wire. What magnetic field is produced at the c+qkd ;3 niu2an3bwl7rz-l v v-enter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a czhniainl5 tg1zg e ) x.hwfa,-;:5:dj urrent of 4.0 A. What strength of magnetic fie-lj,ht:)5inz gza ai;f xh15 nwd.g:eld will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm lonv jq-9-b+mfcjg to generate a 1.0-T magnetic field at the center?j- +j9bcq fvm-

  How many turns should a 10-cm long solenoid have if it is2 pjxbx2 ppz9-4xy*lq to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment ooc9h pm1+k2pijda-r 3f a rectangular loop of 120 turns that carries 6.0 A if its dimensions o 1pdr j-mhki3c2+a9pare 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0u02,/y4 c5 jkce boeng.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetb2eyjuc/4o0 k5n ,ce gic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cros8u ex-4g mqiu7kh7y- is-sectional 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 of 2.0 A is in a magnetic field of 3.59 b0sfev h1stl.(jz1y T. The loop has an area 0(yfbv11tezl9 sh sj.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 (gnwo :*wk6 xiacun7,7 ; gdaguniform 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 parallelg wx*ka(7wc7o,a:gnng 6diu ; to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fiezb)nzu*r an2fglu2 04ld 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 magnet)u2u*na znbz 2lr4 f0gic field?

  A circular wire loop of arx9:1;z h e);ibucod njea $0.25 \; m^{2}$ 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 parti.4oo nx lvb7)fhebq,-i*g pa* cle (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 velocm95o+*ivpgnjy xan 6:ity $6.9 \times 10^6 \; m/s$ 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 1.7r :pszi5h iz30 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton3i:z7hpr5z is's resulting orbit?

  A proton is accelerated from restl a t(z8a(;gnm through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the aatl8mz ;n( (gpath it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV be:gh6em6 d5wg;hr/ncy s ;ds: lfore entering a ry/dd6lse m5:gnc;; :6gw h shvelocity 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?