If the north poles of two bar magnets are broup41vqtdq9 5yja+ b:t bght close to each other, the magnept dyjqq51v 9bta4b:+ts will

  If the south pole of one bar magnet is r 0-wg en4fc2div b.13*q ycqcbrought near the north pole of a second bar magnet2-.e14cywq r vgndqf3cic*b0 , the two magnets will

  If a bar magnet is divided into two eqpy34z)pqhq 8h (ctq +lual pieces,

  The Earth's geographic North Pole is magnetically0 (9gom(rebbh a

  The south pole of a magnet points toward the Ear png4.0(s k7q kbdm8fw1csg4qth's

  An electric current prod 9.royk;cl s sg)lyt,(uun7 xh28r-evuces

  Which of the following is corrzrl8 x;i2nr dbhpec) jt ti a7*p,(u40ect?

  A vertical wire carries a current straight d)7y/eq f(.pb6ocm2 g o10a0rzxrtssghbo 17 fown. To the east of this wire, the magnetic field .a 7pg0cfzos /r xgs to o0rh6q)bbye7 1(1f2mpoints

  A horizontal wire carries a current straig3 hel r4p37jqrht toward you. From your point of view, the magnetic field caus3e7j h lqp3r4red by this current

  A current carrying loop of wire lies flat on a table top. When viewed fro.awp)y9 mqgqdan8/i7 * zl nf-k;p fo1m above, the current moves around the loop in a counterclockwise sense. What is the directizf 1da98 .gn 7/mpk ;qli pawq*-noy)fon of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circulakn 8q1mh sug45r loop of wire lies flat on a table top. When viewed from above, the current moves around the loop5k 1n4hmgs8qu 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 is th:46i khi rck:ee

  1 T is equivalent toy;g ra-dniu /+wbky ((

  The direction of the force on a curretd ss jzndc0e6 ;v3y),e. qqk-nt-carrying wire in a magnetic field is described by which of the foc;q,.k6se je )q0d nyz3td-vs llowing?

  The force on a current-carryingy;*hot4x ;6 s3tc2 )rmrr wpjc wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is eq tc **nkr,z8enual to zero when

  A vertical wire carries a currentpr6wu i18 qj,o straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force 6qo,1 8r jpwiuon this current?

  A charged particle moves and experiences n3zboed7 1 ei*go magnetic force. From this we can conclude d31ee* bgoz7i that

  A charged particle moves with a constant speed through a regift+h44 :bs ,(kdom cob8lkw44p hvsc8on where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum oht84c4s4 +:k v4skwpl fmhb (8dcb ,owhen the particle moves

  A charged particle moves across a constant magnetic field. The mac ) wu7l+qbmjx h,de*)gnetic force on t7d*) xube,)jlw+qhc mhis particle

  A charged particle is injected into a uniform magnetic field sw6,sc5 c nelut)o9jq1 uch that its velocity vector is perpendicular to the magn1qewnjs5, ucolc6 t9)etic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travrl) +t fi*,g j4kfl9hqeling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, thef9* klhjg,lt qfi+4)r radius of the circular path would be

  A particle carrying a charge of +e travels in anf)uln - //how circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, t /wnnl/o-)huf he radius of the circular path would have been

  At a particular instant, an electron moves6 .i2 0bhdeg 2nht;kf4j vcm5t eastward at speed V in a uniform magnetic field that is direnvcbm .j0i4; 5tk2d2g feth6hcted straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observew qmwy;v0* :ssoa0e k8d to curve upward as the result of a magnetic field. Th*yvmowseks00 ;aq8: w e direction of the magnetic field is

  An electron moving along the +x axjzpmky(zei-+t7xye-g.mq yn) l,7z9is enters a region where there is a uniform magnetic field in thy-zm-xg77nq z 9(.pelktei+yj,zy) me +y direction. What is the 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 current-carrying wire9ut8ci-b: ,w qo1t 7wbl. ald8kubi9f is

  At double the distance f9gr)8 oz:pn8ix5 igiarom a long current-carrying wire, the strength of the magnetic field produced by thio5np9ia)g:ix zr 8 g8at wire decreases to

  Two long parallel wires placed sibv/hgb k-dr +g57ox 2sde-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 carries current away from you. From your point of view, the magnetic field at the point exahbx5b grsog+d/-kv2 7 ctly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry-w* +afqvhg9rb6a; h3ryma.j identical current straight toward you. From your point of view, the magnetic field at the poinh3bar*6 jy9v +g wa .;rmh-afqt exactly between the two wires

  Two long parallel wiiot,0q russ: /sy q7mh t;ldw.9dvn+8res carry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What iw97sssm, i otn;lqh+8y./vurd qtd:0s the magnitude of the new force between the two wires?

  A long straight wire carries current towar 0zsrv+ jkcv12i 3iqrw,g*ah- d the east. A proton moves toward the east alongside and just south of the wire. What is the diji*is0r 2h,3 +vv wac-1qgkr zrection of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bo0095 7p)pkq lduona7dju q- lattom 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 righp5u9ldp0k qa 7ld0 7- qojna)ut?

  Two long parallel wires are placedm3k5i( q2 o3evpirq-. dj7v mp side-by-side on a horizontal table. If the wires carry curren(.v5 k i 3i-3 mvpq2rqmpjdoe7t in the same direction,

  Two long parallel wires are placed sidey a4v y,4w4wsu c)tka.ywd, )g-by-side on a horizontal table. If the wires carry current in opposite directions4y4c,stgw vuaya ,.wyk4 d))w ,

  Consider two current-carrying circular loops. /2i(qdfyxgvfvp3o *0i1f .cr Both are made from one strand of wire and both carry the same current, but one has twice the radius of thf0 gpx i3f/2r 1ov *v(df.yicqe 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 are made wbw +;e.dlg z( z)alme( q6eiq1kxh3; from one strand of wire and both carry the same current, but oneg3ze)(+ zl awmq hxq1ew;.bi d e6(;lk has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a curh 13wdrqd oa:5fwm /r2rent carrying loop occurs when the angle between the loop's magnetifd:wm d a3rh1q 2wo/r5c moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that ukih3ae j ;(:ois free to rotate in any direction will experience a torque until its magnetic moment vectoo (i:jeua ;k3hr

  What fundamental fact underlies20sfcon bou5ks c32,p the operation of essentially all electric motors?nsu2obpkf3c o ,250sc

  A circular wire loop lies iuttnm8z3p7(.8ux ung (kh i9an a horizontal 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 tm t9(88nk7g3 .znuu(uih a pxnorth 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 ..1h(qrmhjbbb .r)9 wpil,z nis accelerated through a potential difference V and allowed to enter a magm(ihw zln,.r.q 1 .)jr hbbpb9netic 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 chargea(h77ppu :b+iwrrr6ce xty+9d particle passing through crossed electric and magnetu ipt6 b7rp ce:ar7w(x+y+r9 hic 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 north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 9 vjt10g6n8irqcwunfx s ka1;cu:9 p50.60 A is oriented parallel to a uniform magnn 9u8u5;6f pjvir09 : qksn1tc1 wxacgetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current i:az bb1g:fbuk/ep+4of 10 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 Aik:;vaojar08c3chq ;y, f .mijb f/7y when it is placed ij3k;i cr/afojavf7 8.b ci:q0yh,; myn a magnetic field of 0.020 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 0.0+6v pnb 4 spbm.0kfgx050 kg and is in a magnetic field of 0.10 T. What0.mx4v kbf0pn+ bgp 6s minimum 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 magn3tn5clr c krw3mf1(5aetic field of 0.20 T. What is the magnitude of the magnetic force on the protonw rm5nc(c5k l1a3t3 rf?

  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 wit t sfpb)hn3:3uh a speed 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 sczz(l( j tbs/c) sc4-cb1-u xof $5.0 \times 10^7 \; m/s$ 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 travelin6t ug;va1uvenr4;z sll :.:r ng 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 with 6/t;pvt(er 456sag iqoww sbf2ti77j 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 speed ol5p9f pkyvh +5tm.x his )a+a.f $8.0 \times 10^6 \; m/s$ 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 kfj.ma(8hq (a85fbjeof $3.0 \times 10^6 \; m/s$ 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 is4q;laaq x:hz88m,s ud the magnitude of the magnetic field at a distance of aa l,q xd4s;:mq8uz8h 0.15 m from the wire?

  A high power line cacqip8 vn f f7. 0b(cfs2bm4su(rrying 1000 A generates what magnetic field at the ground, 10 m aqcsf0.bi 2sb mpn8c7((4 ff uvway?

  How much current must flg vjxoq1-u/,uvn9xm*ow 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 stra.alu 2 vag9,gwight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the2vuagg .,wa9 l Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currw 4u7n pzhl 4q3n c6we.(rvxw2ents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires atpcu6qw nr3v4zw 2 xlne7 hw(4. 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 in opposit k, etl:pjd(-s8h2 o;iko o*7g awd5kwe directions. The wires are sp-la8 ,5oed k7 tko: ( ;wghk2dswji*oeparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry cu8mdnf177m q zkrrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the t7znqd m f8k1m7wo wires are the contributions from the two wires the same?

  Four long parallel wires each c 8v4(wkyb g-pb-go em.arry 2.0 A in the same 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 the other -bkv (yg4ge.bm-opw8wires?

  Two long parallel wires carh+kho/5:c ol kry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the k+ohl/o:5k hc magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of ,oeu acf,j; nuj a)( 2bgw;:dlradius 4.0 cm when a current of 2.0 A flows in the wiraje;,2(d;,u) fu ngobca:lw je?

  A solenoid 20 cm long is wound with 5000 tnow6.e071 : bgoxijtv urns of wire. What magnetic field is produced at the center oo1 0nix bj:76 gowv.etf the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long an;5 ahwpb*v6lhy)p h 8kd carries a current of 4.0 A. What st p8;h b)6wp 5ahkvyh*lrength of magnetic field will it have at its center?

  How much current must pass th (o21wmy,-ls d hf*nfarough a 400 turn coil 4.0 cm long to generate a 1.0-T mwns ,al-y d21fofh* m(agnetic field at the center?

  How many turns should a d6b ho ruzq5tcf.2v2 +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 t. 2j,gv i/iwtuyb5b*s urns that carries 6.0 A if its di*y u.s i5/viw,btjg 2bmensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m itb6dwje q dfq5+7 ut/5:nig,ks 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 ig7 wkt d fequn 5:q65jid,+t/bs perpendicular to the magnetic field?

  A circular loop of wire of cross-shr+4iu/ ane,g92z8n(6lzd dbir vc/c ectional 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 2.0e e; up.e.c*ob A is in a magnetic field of 3.5 T. The loop has oecpu *;eeb ..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 0pyl/ eo23bx1ey 0zqu0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is para3ybepl qu 0/1x2ey0 zollel to the magnetic field?

  A circular loop of wire of radiuyera04 bfl e(xl/8 rer p-hg)-l6 v(c;)ugtwys 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magne u)6x -eeyg r-a)lrf l;ltergc4/bp(wy ( hv80tic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop 0z;v;wetvdr q o xri;8cb39u(e/u p h,of area $0.25 \; m^{2}$ 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, , kcl. c+ufyh.a single-charged 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 witzqii7 op-+lv bcgr5*-lqmlv7-/m p + th velocity $6.9 \times 10^6 \; m/s$ 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 thro;rb 6*4ziv )v*7qrrb;cuo wvb ox81owugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of ther* o 7wc6;rbzv*; 8uw xboiobr v14)qv proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiell l: h)8y;5 ibmfdf7pad of 0.30 T oriented perpendicular to its direction of motion. Determine the radius d)h;f8mif a75b lpyl:of the path it follows.

  A beam of electrons is accelerated through a potential difference of occb-myc 0gx,qyuim* wi0y5 4 cm 14h(10 kV before entering a velocity 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 t1,0om icc*c 04why(xybug - 5c4i mymqhe particles are to be undeflected?