If the north poles of two bar magnet2c)w912vn ngc) 7 nhfimxty4is are brought close to each other, the magnets wint97)c i4nf)m1 wchxg yin2 2vll

  If the south pole of one bar magnet is brought near the north pole ofc8vb(mftbh *s6 rb7* lqjhp/+ a second bar magnet,q/*lbbpc h(msrv8jh* 6tf+b7 the two magnets will

  If a bar magnet is divided into tw6bizpc b -kj0;kr,xugue/ 4t/ wn,4yyo equal pieces,

  The Earth's geographic North Poz1d(mw5 g 1jqqao -:ogle is magnetically a

  The south pole of a magnet u2auo(pp 5)q dpoints toward the Earth's

  An electric current progc;i:. 9b bypkduces

  Which of the following ijy ,i,4 .dcml0z,wg ( epo-bcis correct?

  A vertical wire carries a current strz;wx2s7z x80efae cs4 aight down. To the east of this wire, the magnetic fie0xe fzaz28sxw e7s4; cld points

  A horizontal wire carries a current straight toward you. From your point ofwm7mm*r e k9f2 view, the marmk e 2*7w9mfmgnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed fromh7f qrcl0 wk4 436szbj above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside jhw f6qrcbz44k7s l03the loop? The magnetic field

  A current carrying circular loo /rix ey9xn2zt1 7cm2dp of wire lies flat 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 this current, inside the loop? The magndizxnty2x c e /29m71retic field

  The SI unit of magnetic field 2zb;2m 9vntl fis the

  1 T is equivalent to xhf q:+okmk,1

  The direction of the force on a current-carrying wire in a magneall njdjg l-4:gu -5xm*:ld pi 4;rr9xtic field is described by which of the l:x mgnr5pd;l4--xg l9rl: u d4ijja*following?

  The force on a current-carrying wir b2z43rvzpe2 usq o6/je in a magnetic field is the strongest when

  The force on a current-6(sp w4 bgg,fxcarrying wire in a magnetic field is equal to zero when

  A vertical wire carries a curryri vs3*v7l) eqg 89t+cqty6o ent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting fori+y o6g)teqvl8c*9 7ry3 qst vce on this current?

  A charged particle moves and experief/ cujz**wbj3cf6 6gfnces no magnetic force. From this we can con j6/u*zfgw*bfcf63c jclude that

  A charged particle moves with a constant speed through a region where a unifo 2o.sfm xevlzv ns*y1 b0e/y2(rm magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be/ 1xz( o2e2 ylvv*ysnsm 0feb. maximum when the particle moves

  A charged particle moves across a constant magnetic field. The mu 6 ko)e *x6z(ff9moxjagnetic force on thiz9)o*mefkx (j fo66 uxs particle

  A charged particle is injected into a uniform magnetic field such thwv(y ub/okwo.bz4e )8 at its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particleu)b.b k e/owoy(zwv48 will

  A charged particle is observed traveling in a circular path in a uniform maguk9)mo.wp :kfe1tda 6netic awdpof:.) k tm19u6kefield. If the particle 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 uni ,:6rdkog kmu1 6oz5heform magnetic field. If instead the particle carried a charz or6e6 hg o,:um5kd1kge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a unit yvdbq n qfmgy54tz h(21,r+.form magnetic fi t ,grq(4m.zh+f1bd2 5qvytny eld that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity5o1rhv nbh53 a to the south but is observed to curve upward as the result of avhnh3r a5ob 15 magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there-2 fs8lwyl(w/ ps8 uyz is a uniform mag2ww - zy fyl8(/l8psusnetic 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 producedkkp/4bqe/ pp/(jm z(dt7zm 3 e by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength o :4o weif r.u6 +wmyfg.e)ajp(f the magnet.iowypf meegau) rj f4+w.:6 (ic field produced by that wire decreases to

  Two long parallel wirvfpj-)cj() 5/bejlr7d jp n) mes placed side-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 pmc)p l)fvn/bd jp-je5) jj(7 roint exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry i n0ojx)ipap 7 i;xum53dentical current straight toward yo7p5oa); j xunp0ii m3xu. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry)e v-fymqfbpv:5o /q1 equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude v :fp/bf -qvo)m5yeq1of the new force between the two wires?

  A long straight wire carries6sczr2p+h -7 utgxt*y current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direr* ch7zt+tg6xs2y pu -ction of the force on the proton?

  A wire lying in the plane of the page car 95mzu n0tvn8uries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is movin95tm uz0nv 8nug perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed si; e/wxh./.xp-c k efaude-by-side on a horizontal table. If the wires carry current in the same directi.cwk e;.fxh-/ep /xua on,

  Two long parallel wires are placed side-by-li+x 7l 8:k6n4;kvog jauk 7vl2+s.ugh b5z mbside on a horizontal table. If the wireskaxbh:gk 7nkjz s bi7o5g4l2 +vl .vm;l86u+u carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from t- cbq;gzvs02 one strand of wire and both carry the same current, but one has twice the radius of0v tsg2;-zq cb 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 s *p e-3ocwdd2 sgmr4p9trand of *p-4pcge ds 3od2m 9rwwire 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 the angle between the/xnl k 6aj6g7f loop's magnetic moment and the magnetic field 6jfln/g xa7k6 vector is

  When placed askew in a magnetic field, a current carrying loop that is free t.kb6-kq e x+mr( t365dtdmkido rotate in any direction will experience a t-ike+(q k 6t6mx.d3bmdk dtr5 orque until its magnetic moment vector

  What fundamental fact underlies thepfwa ooq n)(691aea7/j:xrxs operation of essentially all electric motors?)osfwx9 6x qra(1:neojp aa7/

  A circular wire loop lies in a horizontal plane on a table 6o xpk6y4; y uic(oc)vand 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 poyy()k46 ovxic;cu6 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 is accep i 8+zqx1 k pq.abdkx):s-h9flerated through a potential difference V and allowed to enter a magnetic field B, whe1sfa8z. p 9i:q-+b)xpx kqkd hre 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 particlfv-plyfp ;eggu48* )n e passing through crossed electric and magnetic fields. The forces exerted by these fields a-gef 8fp ;nu*y4l )gvpre 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 marfgcq(:6 +an( drxe:sgneticnr6f(g x:q+ersc(:da field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr)8 rkbt9s aff7zsnm 6k7dz9x2ent of 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 jepl6+n72 l6sg 8qysfcarrying 5.0 A when it is placed in a magnetic fn7y8s2qs 6fjp le+l6gield 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 mbzl ( q2pw t*b+xp-/ov long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rodpp bt+ o/ (bzw2lvx-*q is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field ofrb1 n3vc-) cofeq+ 2ud 0.20 T. What is the magnitude of)rn+bc3-dcv1e 2 ufoq 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 sp qe 2jfp6di(in0d*s 6ueed 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 o )jo0 vd0ya0mtf $5.0 \times 10^7 \; m/s$ 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 s n:gu+ qu1xr8+ d9+xn6wcnsze t: *kmnorth 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 opyjm- g n.*jm78bto+kz0 jd7ef $8.0 \times 10^6 \; m/s$ 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 e28)yqp6 1lsr-/la,gkekdr k 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 speed e h m*fqq,41cwof $3.0 \times 10^6 \; m/s$ 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 wiraev01b v(3qqls+pu+ f e carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0 l310v (vb+f+u eqsqap.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fieldnli- to/icwg0idir477 2f w 7m at the ground, 10 m awa70o- fgc 4imilw2i /w77dtnir y?

  How much current must f h3c96mx * dlhlphmadm99hao l *:qd,*low 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 currecc 9:j2e(m 7p1vb5ldbg2biz fqpl16 unt of 5.0 A is the magnitude of the magnetic field due to cvpj:bfmd e5b( l7p 1bz9gi1qc2lu62the 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 ;7go pnmd9tc9 A in opposite directions. They are separated by 40 cm. What is the magnetic field itg7dnp 99 ;comn 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 cuge apu.3dhs9tw h0r*1rrents of 20 A and 5.0 A in opposite directions. d1wp ae.03sth r9hgu*The wires 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 opposite dir. uzyf);vh:hf ;fjw o1ections. The wires are separated by 0.20 m. At what poinf:hufoz1hw jf);.y;vt 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 direction. They are paralls :l.bi:ql fd e8zf05tel to l te:b8:50dzs fl.fqithe 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 wires?

  Two long parallel wires cartg :e r+wumufxnfjv o7( 31x286bar;nry 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 p xuw6rn(ffn 3vmag r7;18:j+ubot2xeer unit length between the two wires.

  What is the magnetic field at the center of a circular loop 4pbz4 6. qjylhof wire of radius 4.0 cm when a current of 2.0 A yjl.qb44 zph6flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fo * tfuv z0 )yiovzw3frjv)4/1ield is produced at the center of the solenoid ivz)y4zv/0)ofwv rft *1oj 3uwhen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Wh.mw / fer46 oh ihwh(-w3ceqgq3q -wq.s9fjg /at strength of magnetic field will it have at its centeq3e9c3 w-4fmehwwgjwfq-6.hs oi .g h(q/q/rr?

  How much current must pass through a 400 turn coil 4.0 cm 3fz)rf/orm0ylong to generate a 1.0-T magnetic field at the centm3or/z fr0fy )er?

  How many turns should a 10-e*b+n vt5v) tzjry z-x*/jp+wcm 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 retkp )a jx9d*i4ctangular loop of 120 turns that carries 6.0 A i* ak9p jdt)i4xf its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of r6tqono x7jw y)sg27 o5adius 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 magnetic torque when the plane of tjw g25tqx)n7 s7ooy6ohe loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-section;,at1w5k1 r wp ifg4ntal 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)lda7kp* sjg7w:e c*p(l ne 7a current of 2.0 A is in a magnetic field of 3.5 T. The (7akj*gld p * e7:lcap n)s7weloop 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 radius 0.50 m i6 0yfduuj2.yq s in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is t6 dy2qf0yu .juhe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius vts-jaa( c- q;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 magnetic torque when the plane of the loop is paralle( aaq cvt;js--l to the magnetic field?

  A circular wire loop o ed5mo0k,hg j: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, lb2/lx+q9mntfjd2+y b+gb( h9 fqy0jz3a9kz 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 with velocity5wciw66ij h:t)3jg-o b ,h udw $6.9 \times 10^6 \; m/s$ 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 r); 9izkumb,u.p) rkqmagnetic field of 0.04m),prbu r.9;q ikkz) u0 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetipy0prov; d 5()e 2dhzpc field of 0.30 T oriented perpendiculad5 d2z(0)epv ;yohprpr to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffe:w5) :h-kalk/fbykaf 6 82j rdvdt rg;rence of 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 requi/fbkf5;lyga8r t)k6wha-2: :ddrj k vred if the particles are to be undeflected?