If the north poles of two bar magnets are brought close to each other, theq u1 q0ysat+3p magnets wip+q 3tq uyas10ll

  If the south pole of one bar magnet is brought near the north pole of a si-fv;*hgn6j p fc*q4egjf) *kecond bar magnet, the two magnc*gf;i)-jq nfk jf *e*hvg4p 6ets will

  If a bar magnet is divided int1tx+( l:t e wjgyn zmwio,:e55o two equal pieces,

  The Earth's geographic Northaxq- );aii3mo Pole is magnetically a

  The south pole of a magnet poi en irw)zb 02fj:o-a/19pvpr) x0 yignnts toward the Earth's

  An electric current f2xf.r ki t*vik0rgb* odlm . p-,l(m(produces

  Which of the following is clr5 kf7o1: cey8z,d ioorrect?

  A vertical wire carries a current stcd,8pk ,zj82r bn(k uoraight down. To the east of this wire, the mag2odr (,kk8 b8ncpj,u znetic field points

  A horizontal wire carries a current straight toward you. From your poinog6 ib345qb fv6* xcxyezs3ap8ij c1: t of viewx6 bgz 8p:*ie5c3as4b f ixj31 q6cvyo, the magnetic field caused by this current

  A current carrying loop of wire lies flat on /fzr7 upsqiy q9j2:a(/b:k f21 ynr fma 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 this current, p2u :yy/q/2ns7r jb9fzrf: fm k1iqa( outside the loop? The magnetic field

  A current carrying circular loop of re 9(v8/4 z7wvptt.z flbdk7p wire lies flat on a table top. When viewed from /zpk4( bpzfwv87dl.tv t9e7r above, the current moves around the loop 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 theostz46t jm,vrnw2 00 jcbif7ad 0hj3; bt 13vc

  1 T is equivalent to k.isd0ie kf8a9 .k.nk

  The direction of the forn xgj kek81x8+ce on a current-carrying wire in a magnetic field is described by wngkxj +18k8 exhich of the following?

  The force on a current-casrg( xx+na).tqn1a)e .k8tx w h9:n fkrrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a mzhz,k3i ;k5w magnetic field is equal to zero when

  A vertical wire carries-cqli -8wqh2 o a current straight up in a region where the magnetic field vector pl woc-8q2q h-ioints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic for95bcq 2x4d ,nxyq nyp7 gcm5n*ce. From this we can con g4 y9xy nxbd72qcq pc,5mn*5nclude that

  A charged particle moves with a constant speed through a region whaf r 0- o1i2:u3(ksvqjpoa0bsy5f7s qere a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle s 0u(ovfpq so-qb7ry0aj5k1f 3:a2si will be maximum when the particle moves

  A charged particle moves across a constant ma;+tk7r-d4u oh g1s q3 dwucaw(gnetic field. The magnetic force on this parrd-o7gc;w4kud ( hus3t w+q1a ticle

  A charged particle is injected into a uniform magnetic field suchik;d.d2fx.wa5ayop 9 5qoc w1 xe(t) e that its velocity vector is perpendicultc o9. iw .1dx)(f yd5ak 2exo;qewpa5ar to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a unio8 uqcboo06b* form magnetic field. If the particle had been traveling twice as fast, the radius of the circular path woubbo oq o8*u6c0ld be

  A particle carrying a charge of +e travels in a circu.os3 xdfbp,9y lar path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would hav.yfbx,d 3o 9pse been

  At a particular instant, an oq+y(8m *fxv 3r hz:xhocp7;l electron moves eastward at speed V in a uniform magnetic field that im qy+c( xr*3 :7 ph;xzohlvfo8s directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed v4orx b/r//od to curve upward as the reobox //4/rvrdsult of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where tj 5n/ 4hubtb;c+yxx-where 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 +z out of tjwt4uxn/bh by+;x 5c-he page.)

  The magnetic field produced by a long straight current-carrying wire ist0 ph;-ek8ix/wcvwr2

  At double the distance from a long current-carrying /cg 5t qaqu.0jl xd7h7wire, the strength of the magnetic field produced by tq t/a57u 07cl.gh jxqdhat wire decreases to

  Two long parallel wires placed side-:zvk10jm+oaj won2z 8qt nwb +wgo+- 9by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current towar+nwjtvon 2z+j1gz9 o:+kw 08obqamw-d 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-sidei) waqsvz8q72pd:4 x g on a horizontal table carry identical current straight toward you. dqxv:w4g8)2 zsaqi 7p From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wiz ci+etzu5 57q; zge.wres carry equal 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 wir75+. ecqztw i5ez;uz ges?

  A long straight wire carries c hfxz8/ d:1osturrent toward the east. A proton moves toward the east alon hz f/8t:dsx1ogside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries (zn mbe gl46a.s3-bh 3vgvg*fa 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 planeh6g4zvs -m3ebgbng.*l vf( a3 of the page, from your right?

  Two long parallel wires are placed side-by-side on a hp4.0n qj4hm+ bkak o8)f1mtjb orizontal table. If the wires carry current in the jj n.f4pk84tqb+hm0o1m kab) same direction,

  Two long parallel wires are placed2yx6+srmd d;l side-by-side on a horizontal table. If the wires carry current in oppo+ ym2r ;ls6ddxsite directions,

  Consider two current-carrying circular loops. Both are made (,qah. h5) d:xg-hbnh 6ogvucfrom one strand of wire and both carry the same current, but one has twice thau-:hh ( hgbhnv)q d 6,5o.cxge 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 are made from one stran/)w-i+qrb wjnz .tg) ld of wire and bo-ri nb/)lgqt.j+)z wwth 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 larger loop is

  The maximum torque on a current carrying loop occurs when the angmeb9 og/b5 gb-le between the loop's magnetic moment and the magnetic field vmb5go/bb -ge 9ector is

  When placed askew in a re3imh1unbjzx bf 9 r*6gi3*p(i-z+rmagnetic field, a current carrying loop that is free to rotate in any direction will experienre rx*3uf(jb3zm*i n iriz ph9- bg+16ce a torque until its magnetic moment vector

  What fundamental fact underlies th1mg-op/ivy4g+zq-ysu ;8wep e operation of essentially all electric motors?8ypm-wp1gygso+ q-uvi e4 /; z

  A circular wire loop lies in a horizontal plane on a table and carries currenb3-pk0qs6 tlzt 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 sid-t3q b6z0lspk e 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 partzfao g02inwt+j6w-;o icle 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-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the v6aww;-oi oj 02tg z+nfelocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector con5 p1s1vn(p b)e knnqx7sists 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 selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electexq1 )b p75n(v kspn1nric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallels : f;(x: r4nvbxdyq1e to a uniform magnetic f(q:b;f4d ryesx1 vn :xield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directionbk e,j6yfisk3lnx +2)we 4 5zo 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 whenrug 9*27yucy,m(n5ln: mo ; o lpmiwv6 it is placed in a magnetic lnnmworm9m :u; 6*vgop 52y (7lc,yiu 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 0.050 kg a3q1w 3 6aygb/t:govm j icxi5:nd is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic 3 mi/c1 :6jx ivagt:y3bo5wg qforce to cancel the weight of the rod?

  A stationary proton is inbkpb,9 kwd)/m a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force ob)bd mw, kk/p9n 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 of jn-ifnwc a2o.6o l:z7$5.0 \times 10^4 \; m/s$ 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 +di1s75 4ryjcle8 yo l$5.0 \times 10^7 \; m/s$ 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 travelingadj4; hvhfey8/ gu65l 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 a speed of,nzj1 doi zdv axrrbt7w 53 ld:)r700g $8.0 \times 10^6 \; m/s$ 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 sp63afhmsn2,l yeed 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 oi*bl(0x y7sa qf $3.0 \times 10^6 \; m/s$ 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*al.r 2*x, kull/uobnxtc /q 0 the magnitude of the magnetic field at a distance of 0.1lot *uaknx /l/,0r.2xbcu *lq5 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the grou :ve)k m*/lawund, 10 m )kwe/ mu*l: vaaway?

  How much current must flf4pl t1 9k3txhow 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 curspc- ,0mwvczo ;*zk c e:ae-,qrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strengv*-ezepaw;z:,0,- kccqc o smth 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. zizlyy7(rclm8o,nf :h8f29; ay5jr oThey 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, 8y:z;nl9(af o58om7h r2lci yzrfjy cm from the other?

  Two long parallel wires carry ciz oq cab84e66urrents of 20 A and 5.0 A in opposite directions. The wir4biq6ae 6o z8ces are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wirzde ho 6r0v7rn;pt6:eoy( ) cmes carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the tw;o7r v:)eepdr hctm6(0n yz6oo wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. ai ;94uu6 gd8ntab lr1They are parallel to the z-axis, and theyunlbada; u18 g6i t9r4 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 wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A jjj k75g9. )av 3mm d.ffygwo8in the opposite direction. The wires are separ vyfm g.8f5kw3d. am9g)jo7jj ated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center ;oglv9 --el3ew q .9nfi mi1lrof a circular loop of wire of radius 4.0 cm when a current of 2.0 A flowef-ovgi e -3. ;m9ill91qwl rns in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire vv;;)pi/q xh7t4v5ig8 iwe vh. What magnetic field is produced at the center of t/; 4vveg;w)qivi i5p xht8v7hhe solenoid when a current of 10 A flows?

  A solenoid with 500 mku a5g51(yo0df vs8r turns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at its centugykfva(5msdo18 r 05 er?

  How much current must pass through a 400 turn coil 4.0 cm long to genen+ , lgk7hl:+jr.tfv prate a 1.0-T magnetic field at the cen l+:tpv 7jrgh+l. f,nkter?

  How many turns should a 10-cm long solenoid have if it is to generattn-e) if,d9j2rt: tfwaq8z 2 ne a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic )v7* m * s1lkyb8willzmoment of a rectangular loop of 120 turns that carries 6.0 A if its dimensim1 8 v*lsyl 7zbi)w*lkons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of,vym(+:jidfxpm1 lf c c7v3 /f 0.30 T. The current in the loop is 2.0 A. What is the magnetic lfjmi d7y /:(v+cpcx,1vm3f f torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional ar ug,)g,rj, 7y sg-zv5-vlfmknea $0.12 \; m^{2}$ 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 3.5 T x6jyl2jo1w *:iphi,r. The loop h,y j61i hp*oijwxr2: las 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 magnetic field of 0 nl6)m)5on4ghlu g, btwcq9c..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 magnq5.gmghob t 6u9 l,l4wc n))ncetic field?

  A circular loop of wire of radius 0.50 m ilcz83k0 mx( 0g+k jkyxilf5n2s in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when 02 5 yl f8z 0+3limckxj(gxnkkthe plane of the loop is parallel to the magnetic field?

  A circular wire loop ctb.3z,thz3fg2 )wtaof 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 d2itp o)46e (m fktnh.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 velocitx)qdt 3.tsocnckbd9 x+)n lsf8e/(g6 y $6.9 \times 10^6 \; m/s$ 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 potentialvo d e0k(6-y8o3sf k px)cv/rd of 1.0 kV and then moves into a magnetic field of 0.040 T.c o 0kdv(e6xp -fo/r8vk3 )dsy What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters 6mvhn2 tn1/cv a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.v n1vt m2ch6n/

  A beam of electrons is accelerated through a potential difference of 10 kV beo:oj) ko dylui9g9. wx((7rlyfore entering a velocity selector. If the B-field of the velocity se9o7 yry:d)i9. (l(uwokgo xjl lector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?