If the north poles of two bar magnets are brought cy+,iut 7 oxj7wckb.gj) k+ m/llose to each other, the magnetsxyi./jug tl km+ jc7 wob,)7+k will

  If the south pole of one bar magnet is m. ogli:x( t.pbrought near the north pole of a second bar magnetptg:..m l( xio, the two magnets will

  If a bar magnet is divided into two equi:kaxeeg f .rw3+q(4amwp1h/al pieces,

  The Earth's geographic Northej wzvji: -v1, Pole is magnetically a

  The south pole of a op55 1uwfwve cmcg vnnk25f0h93e 9r+magnet points toward the Earth's

  An electric current produ)od3gdxft 7+(p5vl jdafm r17ces

  Which of the following is cou7c6wvn2w u z/rrect?

  A vertical wire carries a current straight down. Th:* .hoi lvdq2o the east of this wire, the magnetic field pointsql v*ioh2h :d.

  A horizontal wire carries a curre89ggz s dq5g7ent straight toward you. From your point of view, the magnetic field caused by tg87g eszqg5 9dhis current

  A current carrying loop of wire lies flat on a table top. When v1h z snuqowpc1u 7-fmvq;3.v,iewed from above, the current moves around the loo1c-v .;fo w ,mhpzuus7nqqv3 1p 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 lies flanq t(vwkf ,jf,2jb(2rt 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 by thi( jjwbn ,(fv22tqf ,krs current, inside the loop? The magnetic field

  The SI unit of magnetic fieldnej ce.9x;3y*e jo) +sdxx) 1-xmaso 9wxp*jh is the

  1 T is equivalent toc1oic ) c4qdx;b647wsiqa oi1

  The direction of the force on a current-carryishx(z .qm (v/png wire in a magnetic field is described by which zx/ (hq v.sp(mof the following?

  The force on a current-carryabp 2 .9ury9jiing wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero wheq6jz/f/b5 z jxn

  A vertical wire carries a current straight up in a regi6tptc.jzi -6 zon where the magnetic field vector points due north. What is the directioz.-zi6 t c6pjtn of the resulting force on this current?

  A charged particle moves an5s8 /hd.tr ugqoiha:mg 7. b.td experiences no magnetic force. From this we can cou7mr gst/q..o8: h 5ditah.bgnclude that

  A charged particle moves with a constant speed through a region where a um0)kkf: /gh eun /fa5nniform magnetic field is prese /a/ khenn)ffu:0 5kgmnt. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic uzyu,6 (3xl indt41 ttfield. The magnetic force on this parti6 4tnttiu( 3uld,yzx1 cle

  A charged particle is injected into a uniform magnetic field such thatc3*2uhqe+j 3f qdcd.w its velocity vector is perpendicular to the magnetic field vector. Ignoring the particlew2+fq* du3j3h qc ce.d's weight, the particle will

  A charged particle is observed traveling in a;1 d zivtq x .79ll)d ;(t2gjbi*imtpw circular path in a uniform magnetic field. If the pi9d tt;l(q xvb1p)djm igil*z2 t.; 7warticle 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 dgs+6osjh3ex h3* czrc5;*xbuniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have bee3js hg5xxb s6c3 r**hz;ocd+ en

  At a particular instant, axak1d;g1fh )a n electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that a1kf;ha x1d )gacts on it is

  An electron has an initial velocity to the south but is observed to cur ofil-16l;pj8cps1a gve upward as the result of a magneticj a1lco1 6gfl ppi;s-8 field. The direction of the magnetic field is

  An electron moving along the +x axis enters a rege19hk( : igjkiion where there is a uniform magnetic field in the +y direction. What is the direction of tghie:ij 91k(k he magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long qr/t /,p ,gsvxg34 yglstraight current-carrying wire is

  At double the distance from a long current-carrying wire, th6h0q8ni1ij- q; ouuit e strength of the magnetic field phjt;i6o0 qnu1 - 8iquiroduced by that wire decreases to

  Two long parallel wires placed side-by-sid cr25(3gn/b9lxcs g qae on a horizontal table carry identical size currents in opposite directions. The wna9gcc/3 xg q2bls(r 5ire 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 p u+nf4o3 grj3fjr +;fzlaced side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the mag fzu3+ r4o3f;gnjf+ jrnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betwe8b5ibger, h1xnz -i p+en the wires is F. The current in each wire is nobini8 prz, 1- gh+5xebw doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current*kfm*z88vl yv vp c i:xo,g00b toward the east. A proton moves toward the east alongside 8f v:**k8m0lpz,cov 0gibxvyand just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plan9:n wf m7sfik1e of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces o fkiwm1nf9s:7 n an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wirct.wp2/z oqs6jc0/x2i3tb9;awbx, p hlkz : ces are placed side-by-side on a horizontal table. If the wxhc3abz/:0;ckjclpiq, 6tt2z/ p.ws o2 9w xbires carry current in the same direction,

  Two long parallel wires are placed side-by-side on a hoxxk pkxu;h3. vs;d1z,rizontal table. If the wires z; xx;h ,u.dpk kv3x1scarry current in opposite directions,

  Consider two current-carrying circul od-nc-;xo *ywvhnwn 4m9k a.o;a g-1lar 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 field at the center of the smaller loop, the magnetic field at the w-m-nglo ;w. ancy1n -koo9;d4h*xvacenter of the larger loop is

  Consider two current-carrying circular loops. Both are made from one st ,;hh fg5l;odtrand of wire and both carry the same currentolgtfh,;;hd 5, but one 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 current carrying vd xa,1; wvpf7u2 x(t4vf gi1kloop occurs when the angle between the loo7d t1a;fw ip 1xg(vv2 kv4,xfup's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop tha;wwr g) j4 1qq*)nbeeb2ai ;qjt is free to rotate in any direction will experience a torque until its magnetican; qw))ige1;*bjw 2rqqe4 jb moment vector

  What fundamental fact underlies the operatin3m d/t 80zlplon of essentially all electric motorslmpn0lzdt3 / 8?

  A circular wire loop lies in a horizontal plane on a table and 6dnrp( n83 fgkc pzqj83g1hggt. w7g6carries current in a counterclockwise dir6 3g1t dgc3j8(fg. qr nwggpz 7hn6pk8ection 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 currents interaction with the magnetic field?

  In a mass spectrometefzb42;pxb ;se 9vot w.r a particle of mass m and charge q is accelerated through a potential differe2ps f;x9ez ;4w.b tobvnce 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 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 particlr*hckv 6b t,7f x;t6pne passing through crossed electric and magnetic fields. The forces exerted by thet;cbhf,* vkrxp7 6nt6se 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 0.60 A a 4kr)p2i19 2)vw:,peg0qzsxsu n pkcis oriented parallel to a uniform magnetic fipi02g u1e2 :s9ckskap4nx)vzr) p,qweld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofdlran(57 p5pw 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 cary. ku--)exc zxrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes yxu .-kxc -)zean 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 magnetisqxhb)3;s4y r5ia h k if).a+ic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weig.5basa;hs y qh)4k+3x) ifriiht of the rod?

  A stationary proton is in a uniform magnetic field of 0.2pa*q7 b2rs;.n7vynad/x4sffzt)q i9 j 2vmj -0 T. What is the magnitude oqjv tf/249- nydaszv fip7jqa*m)2sb;.rxn7 f 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- )bpz bery2.sekgm f2e, mi6 q*de-n: 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 of ( ft9)0x(q)hay swwg6a2cdlo8yr- pe $5.0 \times 10^7 \; m/s$ 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 nortd/gnx9 b9 yj: pkfv:5kvqb* ;ah 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 witrll5 hen+bp70v*(hds h 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 ofc h bks*j38.yl $8.0 \times 10^6 \; m/s$ 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 of5s h:kfec)fxu- 1 r:kk $3.0 \times 10^6 \; m/s$ 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 29s8a u92q nqf *bnq2c0fk.iu o5 A. What is the magnitude of the magnetic field a.*2q 9 uuqqc ibf2sf9n kno08at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground4m0gvrr0u y v*, 10ugrv m0vy04r* m away?

  How much current must flow forakky4tzj, -z-dul g1x3e c r.d3; yme- $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long strdshh,sk( e5-k aight wire carrying a current of 5.0 A is the magnitude of the magnehh ,sk-sk(e 5dtic 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. Thejs-d x.gif th;7z8z-f y are separatexsff.ij h-z g7-tzd8;d 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 from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A 05b6nwexrzoovs0c lu2s6+q / in opposite directions. The wires x o2s/u6vzec5+boqn00rwl 6s are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currenti:g afvg:e f78an( df6s of 20 A and 5.0 A in opposite directions. The wires are separated by fa ged:af( v6ni :g8f70.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same. gluoq5/:umc 2oqk l+ mzaw58 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. Wha mk:m.u5agcw52louzl +/ q8oqt magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carr,b gcjg/.,w(kuj+s nny currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length bet,.(ju+jkg,s wcnb/gn ween the two wires.

  What is the magnetic field at the center of a circular loop of win2 8lyby: )b+son ggz:9/kvdb .f0my ure of radius 4.0 cm when a currb :mnd f/9gyn2y8zoy.b lu+v)sbgk 0 :ent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 500ssq d ;l2o0muj9 hp*5p0 turns of wire. What magnetic field is sop 5 u2mp0q9 sld;*jhproduced at the center 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. What s a2n2wi 2vpm7htrength of magnetic field will it have ata 2npm2v2 i7wh its center?

  How much current must pass through aci,6aazyj./w yyj i hy)w(b3r, ,mnv3 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the cente6v(yyrwyyjz)3i,ihmn/, . c a aj,3 wbr?

  How many turns should a :p:f3se)z t :edde+av10-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 oela )p y) 9,22f+z b5jieuxdxloop of 120 turns that carries 6.0 A if its olapx+fydju2 ez52eb,x 9 i)) dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform mlhsc a1/agsa; p.6ch8agnetic field of 0.30 T. Tcslaapa c.h/s h 8g6;1he 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 crossomh jwgdarm(fio(-r 74z)k *g*v c(9u -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 currd6ed zc8 oz ;ql03,x9f9 mpxbtent of 2.0 A is in a magnetic field of 3.5 T. The loop has an a d30t d6c;x9xq fpl,zezm8o9brea 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 magnet78g nw(ix mrj9ic field of 0.30 T. 89njgx mi(r7w 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 is in a vt5ra xx 8fug2gj 887suniform 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 ma txr88 s2x75 vgaugjf8gnetic field?

  A circular wire loop of*c( if 2gc(/wvcquku* 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, a single-charged particle (m0wbwyqeg h :kv8 a 22dqc/na i0)*j+ncharge 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 velocibit7+3i- 59hinhu tly ty $6.9 \times 10^6 \; m/s$ 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 maw7*-dgl :*ec0n 7c0 fb qe,tqqcv pfijhsy 2/:gnetic field of, qts:l* -h0gfcqdyvefi* w7pn7q2ccj0b /:e 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of i 8ch12al1 tfvn wab.*0.30 T oriented perpendicular to its direction of motion. Deter82w ba ntclfv1ah i*.1mine the radius of the path it follows.

  A beam of electrons is accelerated through pxl.)o0lu u9ufd jz:v8b4 c.j a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a valflulj.u)xj.z p:8d bu0vo c49ue of 0.010 T, what value of the E-field is required if the particles are to be undeflected?