If the north poles of two bar magnets are brought close to each xy3bkwh )pz+ qz4)xs5 other, the magnetshy)px+ z ) 5swk3qxz4b will

  If the south pole of one bar magnet is brought near the nortnrxt0o g *b20zb c4.qlh pole of a second bar mag 0t 2l0gxbbqnc.z*or 4net, the two magnets will

  If a bar magnet is dpdnfid ./ tt0g1a k9r(ivided into two equal pieces,

  The Earth's geographic North Pole is magnetically al42 gu) r*bohwiq* hy8*/flym

  The south pole of a magnet points3l8kg 57e-fi wd 3gu4l/wxko wqv(kq4 toward the Earth's

  An electric current pr4p; och*zpk8vnm .. 7r b18a nzquvm)hoduces

  Which of the following is correct?7y6d( fd+v0kvk xuby) 3hfz: o

  A vertical wire carries a current straight down. To the eaya 2f.t z 83ho1o,fmttst of this wire, the mat8 2oty1fh o.3zf,atmgnetic field points

  A horizontal wire carries a current straight toward you. From your point odcey- +b4v dle;11ay auh k54of view, the magnetic field caused by this currentuldyoa1 +v 1dec;-4 y4bha 5ke

  A current carrying loop of wire li nk+ ccggzfr0(7-yh1g es flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise c kgg gfc+1(rhy7-nz 0sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loopg33unsej,yv ,t :a(k *i :ykws of wire lies flat on a table top. When viewed from above, the current movgaskj ,s ni yy:v,te:*w3uk3 (es 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 o 9 k.f-cs)vxzfield is the

  1 T is equivalent toz3ukzyzhbijca4i*. i90q3pz 7y w 60u

  The direction of the fonjm :4:m3,z. cdtnw mi.,+r n :bsl,h7kcfhjvrce on a current-carrying wire in a magnetic field is described by which of the followin:7m.,k cbvjnrs c:nin3mt dh,,h+ lzjw4f: .mg?

  The force on a current-carrying wire in a mags-vtghu x/ +ifu)* ,g9ie79o-bfvee b netic field is the strongest when

  The force on a current-car8lpsgl .o r(.arying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magneti+z7gnwn- 5law c field vector points due north. What is the direction of the resulting forwan-5lgnw z 7+ce on this current?

  A charged particle moves anf bkt/u6 ln6e*d experiences no magnetic force. From this we can con* nklu/ b6eft6clude that

  A charged particle moves with a constant r 5vlii)z.ok83 pxr,gspeed 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 oz ,lp.r8igi5x )rk3vparticle moves

  A charged particle moves across a constant magnetic field. The magnetic force 7 a0 p+;bh8ch/vw xzlfon this partbphfvh0z8x+l; c wa7/ icle

  A charged particle is injected into a uniform magnetic field q z;4twxj77lnl pce/2such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle'lx7tw4z; neqp jl72c/s weight, the particle will

  A charged particle is observed traveling in a circular path in a un0jb1 k df2z5w5pu2ric7sigg8 iform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path woulk5zi8g cb527id2jfr 0g1wusp d be

  A particle carrying a charge of +e travels in a f xx(lpprdjjf x,kp9 zo6 :915circular path in a uniform magnetic fielxlx 5p1 ox rp9f(k z9:fpjd,6jd. If instead the particle 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 un o8d9gwbnqc)9 iform magnetic field that is directed straight downward. The ma )8wn d9b9qcoggnetic force that acts on it is

  An electron has an initial velocity to the south but ix;9ivt:d j +hds observed to curve upward as the result of ad: ;9t+hvijxd magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unrq3 8 .gio(hph9egpmdb7 v-i7iform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +ehrid.p8- g9 37iomhvq 7pg b(z out of the page.)

  The magnetic field produced by a long straight current-c )x4cm3,p8z jypwoz2c arrying wire is

  At double the distance from a long current-carrying wire, the stren unya-*(/79mzb fx0zk) vgqy mg(zb3agth of the magkxa)y7nu9y gz (z(*m/-va0m3qgzf b bnetic field produced by that wire decreases to

  Two long parallel wires placed sid1l0 u490cpq,gv-f u;xvhrm fte-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward yov-v;, tm4gupulc0f0 hfqx9r 1u, 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-side on a horizontal table carrqi(h kr :1)ydd*a:mcv y identical current std i) h*:v(kay:c1qdr mraight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force phf3* 5srsp ))f :*k vcepdk.qbetween the wires is F. The current in each wire isfvfse*pr 5p: 3dskp khqc)).* now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward t.+ dujpud*zy(heu. ydjdpu(z+ * east alongside 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 a current ti)ce,hj ; j8bqoward 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 plane of the page, from your h;j eq,i8) jcbright?

  Two long parallel wires ao:2g5+ t xuxntjm(n qd15og-j re placed side-by-side on a horizontal table. If the wires carry current in n:djqo551+tu-ngjxtm( gx2o the same direction,

  Two long parallel wires are placed side-by-sidxan71o a 2b -tu. amw3y2pbnh,e on a horizontal table. If the wires carry current in opposit2b pto a.,a12yw haun3mbx7n-e directions,

  Consider two current-carrying circular loops. Both are made fromvu:zr,y6 ts0 q one strand of wire and both carry the same current, but z:,q0 6u vsrtyone 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 circular loops. Both are made from 8*nwrihgicg.0tqo : 4one 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 larger loopc4q*. 0gnr :ogiih8wt is

  The maximum torque on a current carrxea /h +y831sgyp5 sgegsq1 o7ying loop occurs when the angle between the loop's magnetic moment and the /y1q5so17xsy hpg3g sgae8 e+magnetic field vector is

  When placed askew in a magnetic field, a + rvy o1 db74v/dztdow.oj9y- current carrying loop that is free to rotate in any direction wid9-.4zt1 wjyd do+vvoyr b 7o/ll experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electri ertz-j d6om4-c motors?mzj r-te-4o6d

  A circular wire loop lies in a horizontal plankq tiin17 :ur9 +/x xtdg5i9jee 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 thjugi d x: x/i1nt kr9ie7+tq59e 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 partixidm e 75c 9,t(/kcfqucle 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 isftq di7m ,5/ekxu9cc( 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 ogl xt, n1zs6(jk( y.gcharged 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 tzjk lgn( t(y1,gs6x o.o the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uc5s1 ezw/+ac;i6 nvmuniform magnetic f5ezv uanmi6s+c/ c1 ;wield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in atd:e,g-h(y5;0xbvhn6 /wtp8xuihw 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 wv + eeex-.)ojbhen it is placed in a magnetic field of 0.020 T? The wire makes an angle of)o-ebxvj. ee+ $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.0 ;wi(qn9bqdb5 50 kg and is in a magnetic field of 0.10 T. What minimum current iiqb(5 ; 9qdnbwn the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the mf f2.u5:t fxsnagnitude of the magnetic force on the n2s5fu:x ftf .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 speeoa ai m7xx1:d5 kcz8h0d 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 of8 fhqdix6g1;d $5.0 \times 10^7 \; m/s$ 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 wit,n8am9m0ievtrg d ehq5 7 5u;yh 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 wi w .qqf/j8le9pcn2)5cbztc1 rth 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 ofq pcr,7 m(am2uqy:pb3lt,df :8 gz,mm zb*me4 $8.0 \times 10^6 \; m/s$ 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 ofg2f v sl /yq:zcl4)a7wq 1b-qd $3.0 \times 10^6 \; m/s$ 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 carr n o0t/a+ieo )r,k7jqoies a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?7 keqoonaot+ j), 0r/i

  A high power line carrying 1000 A generates what magnetic a ( y3o2n2zczafield at the ground, 10 m away23a 2cn aoyz(z?

  How much current must flow for e56a yqf n9ie3$1.0 \times 10^{-3} \; T$ 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 mwqzw:287b hi jy6x9 keagnitude of the magnetic field due to the wire equal to th87 hizqyjx 96wbw:k e2e strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry current 5w/ t 3/7vkag6xqhtfts 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 3xh6a7 q ft/ gv/tt5kwone wire and 60 cm from the other?

  Two long parallel wires carry current-s ht5 /ipg58l xh;qsbmp-1wds of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m p -h51g lmbpi/qs;st d-w85xh. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directioh5 pr/+dom 3flns. The wires are separated by 0.20 m. At what point between the two wires are the contributions rm d+h 5pl3/offrom the two wires the same?

  Four long parallel wires each carry 2.0 A in this5frge je spq89/) s5e 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 toqj5sgef i)e s/p8 sr59 the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 Ar;thvex(-qs 3)l(p, vt jbh: i in the opposite direction. The wires are sepa-qvvx, )h:jl3(be st ih;pt(r rated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of ra;r k ;ejtoxxo 19n2tp3gdt.;zdius 4.0 cm wxt2x1j3nkzg ;rtpeo; tdo; 9.hen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magw81+; l*.gqgsiazvq mnetic field is produced + l1;gsizagm .qqv*w8at 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 cppk 5gpii3by+:: ayy*urrent of 4.0 A. What strength of magneti5a+bpgiy:py p:3 *kyic field will it have at its center?

  How much current must pass through a 40lahh(kue ))/*lk ox.c0 turn coil 4.0 cm long to generate a 1.0-) uo /.x)lc(khlh*kae T magnetic field at the center?

  How many turns should a 10-cm long c7.6vy 6 c)hf tq zfaqrz*)s/ysolenoid 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 jv(rqkk3 vppq2r q7.p6+zxxilc:7 e )turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cm?+q 6p72ve)cj (qpkivxqrr:kzx3. l p7

  A circular loop of wire of radius 0.50 e- h/ ,uhmc-fom 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 perpendicu -hcuo-meh,f/lar to the magnetic field?

  A circular loop of wire of cross-sectpy0(l 9vri pj1ional 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 o-;bqz lk1y0anf 3.5 T. The loop has0nk-yb;1 z laq 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 ae.:0, r*sb)ouyo vdpeim(. wh uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the mag :)e.rho (*sodvuiwebm.p0 , ynetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m4y, cqkgiq-3 u 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 parallel to the gq-k4 ,3iyuqc magnetic field?

  A circular wire loop ) j cshz60bnzhg;-qe 1of 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 (charge eec,zbqam4n w+yx n:p2/nfq2 4) 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 wit ili q -r ou54om4xcj:fp/v1i8h 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 through a potential.q hi: +ktrfm:skjvhn 6q2-8z of 1.0 kV and then moves into a magnetic field of 0.040 T. Whakv2hq fk .thj6-z:nr+: qms8it is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. n8zz1s zrh8ob:*tb m9 It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follz b*z8: trb ohz91mns8ows.

  A beam of electrons is acceleratedkja .3gy fp+,w through a potential difference of 10 kV before entering a velocity selectw3. ,ypf +akjgor. 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?