If the north poles of two bar magnets are brought clos)baspuq. v.nfuj0tj7pzdc8f( 4 gr, mj*p6. ce to each other, the magnets wdg*jacu usm jt0z.pqv)7 (c nj,4f6b.rpfp.8ill

  If the south pole of one bar magnqf6n-ts 03jdd1)/hglmd gf 9o0os2h get is brought near the north pole of a second bar magnet, the 1f/td3dg6h nq02d )- o0fs j9hmgsolg two magnets will

  If a bar magnet is divided into two equal c:g 0r2typ u423ixt7qsdb7aspieces,

  The Earth's geographic North Pole is 8v )y4s6yu. omacqgl, magnetically a

  The south pole of a magnet points toward the Eartvy -n:behs 04; jrx fdis7+mb5h's

  An electric current produ28 hf jyh:lle)ces

  Which of the following is correctowf-m6u*l8- 2e b3:ta4fh v rb.xkrid?

  A vertical wire carries a current str ef s/5dn y2uc983g fxz3*nuonaight down. To the east of this wire, the magnetic field poixen*35z f 2g9fun3n/ d8uocsynts

  A horizontal wire carries a current straight tow*(,fks/ eoo;onno7 vgard you. From your point of view, the magnetic fielo, ;o 7o/*o(n fgskvend caused by this current

  A current carrying loop of wire lies t 7je mg;c. 9zh/z7goi l,ojy:flat on a table top. When viewed from above, th h.myg,7z l7jgoc; 9i:te jzo/e 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 lies flat on a table top. 61znx79ofqehj54ts ez7 8dxw 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, inside the loop? The ma89n zeqtz17s4hd xxf7wo5j6egnetic field

  The SI unit of magnetic fb j zyq2b*f)0hield is the

  1 T is equivalent to/wq .cwhap 1qn6ct1 ceo )o8+d

  The direction of the force on a current-carrying wire c.;z 63f j wriwb7yc0nin a magnetic field is describ c0r; n3cb7fzjiww6.yed by which of the following?

  The force on a current-carrying wire )l0s hfqyah+867 jghuin a magnetic field is the strongest when

  The force on a current-carrying wire in a magnnw3;vh- qofsguu.,-ar,v .v t etic field is equal to zero when

  A vertical wire carries a current straight up in2s /e*f4ssy/bq,k viv a region where the magnetic field vector points due north. What is the direction of the resulting forc/4/,y2essbs q vi* vfke on this current?

  A charged particle moves and experiences no magnetic force. From this wk0((ojhj mgfj0df;5v e can conclugj 5; dkjo f00jvmh(f(de that

  A charged particle moves with a constant spe9b59zsg rty9e vcjs/3ed 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 maximumgtj9 s 5y3rcebs/9 zv9 when the particle moves

  A charged particle moves across a constant mac e8;l+k qmi0kgnetic field. The magnetic force on th+klk;i 8 qcm0eis particle

  A charged particle is injected intzo*3sd 0.dn;zgs) 2am1rpz(t (yr xzno a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the part;zr 2x( nm as*pt1) 0.zsoydr nz(gzd3icle will

  A charged particle is observed travelinlc.i v5tvan; .b + oyh9d3k1y3qo:xetg in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circulhdtily1 c :ake x9o+5b .y3;nv.vqto3ar path would be

  A particle carrying a f)) /hsvq1csucharge of +e travels in a circular path in a uniform magnetic field. If instead the par qcvu)h1 ss)/fticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speek;-rsu xr ck a4 l8r6o5ce1m*xd V in a uniform magnetic field that is directed straight downward. The magnetic folr5xrexa;k- 4k8oc *s1rum6 crce that acts on it is

  An electron has an inidpiiem5+pg yy /;qld6i;l dk- h10;grst* ,iqtial velocity to the south but is observed to curve upward as the result of a magnetic field.h;0d qgyr*py dqs ; i;pigi,t-6 kli15m+/ dle The direction of the magnetic field is

  An electron moving along the +x axis enters a region where/p -n)3uxuou b there is a uniform mau3pxob)n/ - uugnetic 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 the page.)

  The magnetic field produced by a long straight/t;xx/ m4k fm/ lasjwr74mi3tz v z/v9 current-carrying wire is

  At double the distance from a long current-carrying wire, the strengtrh xbbzx xw;7j3p:hsw)*b; ;n fg 2ej2h of the magnetic field produced jxbphr;w7h b;ew;s z:* j22 bfgx3n)xby that wire decreases to

  Two long parallel wires placed v1 bp 3 +izir bipr kig/):/tq7t*/tpeside-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries cure :ib+ r1gititp)3pp7*z/t/q v kbi/rrent 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 placed side-by-side oaff ,,r)9vqtey gu *qd20q 7rrn a horizontal table carry identical current straight toward you. From your p ,gqq aurtvr*ffd) ,0q7 re2y9oint of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of thrz8y0:vgu6qz i/6 ipi+thd bxw(u)/ue force between the wires is F. The current in each why)/+uibv gq(i/z0 8zp6 tiduxwr 6: uire 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 proton movhc-les+3qya++lai2 2 ku1pkc es toward the east alongside and just south of the wire. What ay 2u+qe12+l-alkc3kcsi+p h is the direction of the force on the proton?

  A wire lying in the pl,wr3u4k rexk i+0cm0f/ ckj9f ane of the page carries a current toward the bottom of the page. ,u jkcrr ifk0/wx30c +kf4m9e 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 right?

  Two long parallel wires are placed side-by-side on a horizontal table. If thmzik3 /iis;nearm1uh 9qn 4,+ e wires carryznm 4 3hik 1mqis+n,ur;9eai/ current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the w -+k z4q/tvpwm b3-rreires carry current in opposite /rz tvp4mrek-w3b -+q directions,

  Consider two current-carrying circular loops. Both are made from onef(nl qvhvca 5.k7su/ - strand of wire and both carry the same current, but one .n 5-avkv( 7suf/chql 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-ca4swr; v7v.0ut alisr81hlkw 5rrying circular loops. Both are made from one strand of wiw8 . 1v5 trhrik;40sw 7llsvaure 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 loop is

  The maximum torque on a current carrying loop occurs when un3w z hb:b:g ra,9di9the angle between the loop's magnetic moment and the magnetic fi,anrbg:hz9iud : 3w 9beld vector is

  When placed askew in a magnetic field, a current carrying loop that is frg0b .fxfdl5*nru1 ow *ee to ro.ndlb 10 5xowrgf u**ftate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electq +pj bf9e63yqric motors?3qjbyp +eq 69f

  A circular wire loop lies in a horizone8 t6 2uai hc;4ak6gcutal 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 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 cu eh6 c28ct6i;akgua4urrents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge l b5trlm- ihe,1fp g+9q is accelerated through a potential difference V and allowed t rl +g,lp-bi mhte91f5o 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 particle passing through c:5nar,b i. ml) hf-alyrossed electric and magnetih. -m)iar l ,n:a5yflbc 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 0.60 A is oriented parallel to a uniform magnbsb f+ccv,d)0ox v62qv:jw-)fs;qx uetic field ofb,x ;2) w fc0xj :-v)+cv6ssdovfuqbq
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directihf6)0 q8fjqdcon 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 cavs,x. u qjw 2+z;a;vn8ecx :rerrying 5.0 A when it is placed in a msv qe:rvn.cxe, ;2x8wuj za;+ agnetic 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 and is in a mag54s z :f)jxcoinetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancez ix ):soc54jfl the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What isb pj1z6 3+pup gvx4hvq: yk )e;cvc+w+ the magnitude of the magnetic z+xcuwv +3 :1 pjghp 4 yvb6;cqp)ev+kforce 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 56tlu i0ai* .kc, tlvno6jhg3a 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 af )n0el2bu7 vno )v+na speed 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 k*ffj;ge 4tgy- :h7wjnorth 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 wi7n1b 5rvsx6vi th 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 wita/h4): 7/j+ybs jgu ( reuzktgh 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 acceleration of the electron.

  A proton has a speedprodt( /;vn g4 of $3.0 \times 10^6 \; m/s$ 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 y amwxyqi8- +1s63bkeA. What is the magnitude of the magnetic field at a distance of 0.15 m from the wi ka6 b8q-ey1yxi3w+msre?

  A high power line carrying 1000 A generates what q,:c )hjgss6xb g;j; lk1kbk.magnetic field at the ground, 10 m a jkls. xk1;kh6 csq gb:)jb,g;way?

  How much current musa 4euws- +5wck(zhde -t flow 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 oftoyt2vg sk :o3gj:fj*;m yk58 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of a:y5jmg:j8f ktokt;g2s *3y o vbout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in oppositz9*1bz o ju1zkj j-;gbe directions. They are separated by 40 cm. What is the magnetic field in the plane ofzjoubjj 9k1-gz ; b1z* 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 in opposite).4*voyn. z8l ypaw ze directions. The wiree zy 8yw).v.pz*4ao lns are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppos1pvxam 2) hi z),6cwlcite directions. The wires are separated by 0.20 m. At what point between the wmxa16 vc ))l2,zcpihtwo wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dire :kbuav rjyyf-j,+ *.gz t1vv(ction. 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 mazy. uv tab:vj(*fj-1+gvr ky ,gnetic 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 k,t mpajg6p11 A in the opposite direction. The wires are separated by 0.30 m. Find the 1 jtpk1p6m ag,magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire tz( v s7)qhbp*1 -pyjwof radius 4.0 cm when a current of 2.0 A flows w)b hjyt(1z-*q7pvs p in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnet6zwxzcyh. bc6a ol2j7w6w,2kic field is produced at the center of the soleno2yx. h6b zw2a7wwz6, o lcj6kcid when a current of 10 A flows?

  A solenoid with 500 turns cn) - glo h,/em0wmp/efi5v8ais 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at its cee)8 g,hval5/fmoec m w-/i0n pnter?

  How much current must pass through a 400 turn coil 4.0 cm lonbp i9s6f90wh jg to generate a 1.0-T magnetic fie0p f9wi 9j6bhsld at the center?

  How many turns should a 10-cm long solenoid have if it is to generate a i-wipe ;b ddz.arw4)h65 c2q e$1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loot +1(tcuni ) u)kg,sbn,h(lhrp of 120 turns that carries 6.0 A if its k,n1nbl sth,) u g(hui)+( rtcdimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire ofj22dy6yv y be/ radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the le62byv/yjyd 2 oop 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 cross-nr/0qoyc.4 v n+z-6cjxrn ad(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 carryinotp,i1vjd:i7 g a current of 2.0 A is in a magnetic field of 3.5 T. The lopd: 1ii to7,vjop has 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 radiuo2agay5)al:b*n bb 6ls 0.50 m is in a uniform magnetic field of 0.30 T. The curr:a nlbb62)lo y5ag b*aent 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 vc694cu- ie mgis in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whiccg4v9u6 - emat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop oca;1mt v6(e a)hn /5spa stg/tmdf i;.f 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 partie pjb:-*zlr *acle (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 velocityl02ly jxgcp).l/7pmzd b1q5 k $6.9 \times 10^6 \; m/s$ 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 ma fp4j- v;flny)gnetic field of 0.040 T. What is the radius of)y-jvn4l ff;p the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Ib9 t7zik 38cmrt enters a magnetic field of 0.30 T oriented perpendicular to its d7m9rz3c 8i ktbirection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befor0li(umaa,vsb22f)e2b 1 m nasjj .y8re entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what m.fy0( ibnja)2a2v,81breaj2ls s mu value of the E-field is required if the particles are to be undeflected?