If the north poles of two bar magnets are brought ctbinb)r-y8 *ibb5par o6i1m:a*e b cvo. z5p2 lose to each other, the magnets wipibac5)rom*a*i5y- 6b 2pb.r 1 bv b:tiez8onll

  If the south pole of one bar magno(d:r)tv (nd get is brought near the north pole of a second bar magnet, the tw on)vdt:( g(rdo magnets will

  If a bar magnet is divided into two equal we8866je8ui9 b uz 1 3e7 gjitfsik2btpieces,

  The Earth's geographic North Pole is m;uffev *e-xj4 agnetically a

  The south pole of a magnet points)si77bh:f r(oikl y,g toward the Earth's

  An electric current produc9ebva06ca ; ll 2okbi0es

  Which of the followih:w4n+91zk*2 0erpk2n5ula :ov /prphrky xang is correct?

  A vertical wire carries a current straight down. To the east of ewr)1 iq7s 1y k5i,t.p0+cx.kapb /gkm: qmpythis wire, the magnetic fie/.1sg5mabkr0ypyiq.)p1kp7ik ecxtmw,+q : ld points

  A horizontal wire carries a current strai-f o z x7ztn62(wj(7sfd: ztought toward you. From your point of view, thsf 72tzdnuto( o:6zz7j-f x( we magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top.:j,za0lk yo 9y When viewed from above, the current moves around the loop in a counterclocky j ,09ao:lkzywise 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 t*.b( v 7wso3fffzrkb 7op. When viewed from above, the current moves around the loop in a counterclockwise sense. What is t r7s*vffkob wb.z7(f3he direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic v 1iz x:sry vexf:)s6/field is the

  1 T is equivalent to9083 d snbnvol

  The direction of the force on a current-carrying yb0bbqino cvzv 5403 t:u,m2eg: m6nvwire in a magnetic field is descri4 vmn,3q00mn2tb6eibuvygc5 o: :zvb bed by which of the following?

  The force on a curred s)5yrbc n6)q it 9)ltxyj-m-sza.5int-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is j3upy51;wf e2t+ ceaf equal to zero when

  A vertical wire carries a current straight up in a2dozn:b ,jfn8 region where the magnetic field vector points due noj2nbzdf ,8:o nrth. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we cand,lz9qu ,5b0jca*t1 ezv i-dr conclude th z q ,bjlz0ct-,5uedvr91adi*at

  A charged particle moves with a constsi 9r:2y ncw9cjx j,pl1v1kl5ant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magcl iv9l 2c:krx1w, yjn9 15pjsnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic fi(f( +lcqwc(yfeld. The magnetic force on this particle+ clcyf(( qw(f

  A charged particle is injected into a uniform magpu1c +kbi 7-m3ir 8uujnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's u+-b1i uik p 7cu8j3rmweight, the particle will

  A charged particle is observed traveling in a circular path in a uniunq 1cp507ozwn .u :sxform magnetic field. If the particle had been traveling twice as fast, the radius of the circular q5ux :n017 w cuzpsno.path would be

  A particle carrying a charge of +e travels in a circwdmi6p c4,7 z.op9uj wular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would haveui9dmwp7 6zw jo .,4pc been

  At a particular instant, an electron d-;t6 xdxctg- +k3bximoves eastward at speed V in a uniform magnetic field that is directed std-t6x3+c x-gk idxb ;traight downward. The magnetic force that acts on it is

  An electron has an initial vel(1 *s/a nwoocyh2pny+ ocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnet o *nycs2 o/1n(w+apyhic field is

  An electron moving along the +x axis enters a region where there is a uniform mzvi h s04ny5nr0 l(n/:mmaew l z,j,2uagnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y n i20azlh:s n5/rm,ejz(,wnum 4l0y vup, and +z out of the page.)

  The magnetic field produced by a long straig (e3d3cg8zotf ht current-carrying wire is

  At double the distance from a long current-carrying wire, the b+m8mege4twuj g69d2w6 htlb 3*3 enb strength of the magn4weg 9tj bw3t2e ehm3lm*6nb+ 6 u8bgdetic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horit(z;0j nr (ab 7ttmg5hzontal 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. Froat h g(b0m;7njttz(r5m 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 horizont 4vfci3,n tda3(;ob.l znzq w-al table carry identical current straight toward y;l.o -dw3 nqa 4ni tz3zfv(,bcou. 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 fo(4l i4nbg/0qwubn j3q rce between the wires is F4gui (bwnqln/ q jb034. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wirei1ld u:3, +wv;eh l)fnf-jqb2lf9)uy2y sf u r carries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force l)yh,u) lysqjffvr-9fi db22 n+ ;uuwl f1e 3:on the proton?

  A wire lying in the plane of the page carries a current toward /ny+*y:mu7zbl xfba3 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 ay l mzu/+b*y73nfb x:of the page, from your right?

  Two long parallel wirzon7.., /.u ehfzqc oues are placed side-by-side on a horizontal table. If the wires carry current in the same directioz,.uuneqo.7f c .z/ohn,

  Two long parallel wires are placed side-by-side on a horizontal table. (ot7z k.rc3iuIf the wires carry current in opposite d zurio.t 73(ckirections,

  Consider two current-ctrmjwjco1xmh )t w 66+)s *m,oarrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Comp+omh * )mm)w oj x6js6rct,tw1ared 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 mab cu .,tvn :qgtehv.;drfx6p.s +0hv (,p:shtde from one strand of wire and both carry th6v+dp(ubvch:rt.t :, vg0;hteq.s n p.,sxfhe 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 currop3e/pl pv5r*iv6q5sfid:w .ent carrying loop occurs when the angle between the loop's magnetic momi5v3:w/o56p*i fpl.qrespd vent and the magnetic field vector is

  When placed askew in a magnetic field, a currentg;bvkz7koe 5irl(b )g; hxd -9 carrying loop that is free to rotate in any direction will experience a torque until its magnetic momen 7hz)b5 bl;kier;g-ogkdx v9 (t vector

  What fundamental fact underlies the operation*p aid0v /l8ne of essentially all electric motorsvi n de0apl*8/?

  A circular wire loop lies in a horizontal plam; wwh:s la:5qne 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 currents interaction with the magnetic f 5:qml:ww;a shield?

  In a mass spectrometer a particle of mass m and charge q is accel*xurzvjzd cx0f *6 z7n*rs71fixq2/terated through a potentiac6xx uifz* tqnf rj dvx0r21/7**z s7zl 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 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 crossed e m:iupik) db0k5st7;p lectric and magnetic fields. The forces exerted by these 7p0pbki; k s)mt:iud5 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 wbf .8 hix -x-t6 uz0l+a2urpois oriented parallel to a uniform magnetic f 0huu-axtf-+ipr .6oxzb 82lwield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of o6wsr8 ill67zn /h e+y$30^{\circ}$ 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 straightnzzpy l.z. 569q 9g)z*hi4 epzjm5lyk wire carrying 5.0 A when it is placed in a magnetil . q9 p5)gzy65p *ljz9zz4 .ihnymkzec 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 oxi 61siudmn/d hhx(+ /f 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod ishm1i h6i /nxx(d/s +du needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fie -h +mig82mcyold of 0.20 T. What is the magnitudeymc2 o8g+mi- h of 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 spepj8puq)wdzx. 9l: jy +ed 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 o9ka 0eclb3) pg)h8qi.xkop r, f $5.0 \times 10^7 \; m/s$ 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 witm( 45n 4gwkm 0wri:okfh 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/9dg b pl6xo,y 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 speedaw0 y-(b-vb 3tjix13 uuxo.ob 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 a bn x3:7l oe-pd5prw,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 y (o vpi6sn(a)carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wires oypv (6)ina(?

  A high power line carrying 1000 A generd6 mqw3jl sffu2;/g b,ates what magnetic field at the ground, 10 muj2/,gwbd3sm; 6 ffql away?

  How much current must;wqdyp 5 6d6zz 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 straighttwog/ ,5oy1gt69 kepaf.6h h p wire carrying a current of 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 abougf9o/t6 hg1 5op ek 6tap.h,ywt $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A insn;hrko,ak95q j /te 9 opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20eqj9;,s o9a5khn trk / 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 directy/o eexpw9/ :oions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wirw o:/pyx9eo/e es?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directnxw )je+8g5u5gqkak /ions. 5 uajx5/)gn+w8kkegqThe wires are separated by 0.20 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 direction. They are pa*8womew og8aitw0 xi0w;5t d2rallel to the z-axis, and they pass through the corners of a square of side 4.0 cm m tito0*wd2w wix og80e;5wa8 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 in the opposite dir0lu6ra;8 ewzg;a cy7 0jvdie *ection. The y*c;j g0ieru7;valwa86z 0de wires are separated 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 uj3- mfe6bzzc k1x8g ,wire of radius 4.0 cm when a current of 2.0 A 613c,fzzj me8 xku- gbflows in the wire?

  A solenoid 20 cm long is wop)vz aq4mp6zj7z/:sgu no +v+und with 5000 turns of wire. What magnetic field is produced at the center6gpzv4s jm+az nqp+v/7ou )z: of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m loyt5b:2v2:rfaq dzvk 8ng and carries a current of 4.0 A. What strength of magnetic field will it have at it k:z:vd2bva yr2q 8t5fs center?

  How much current must pass through a 400 turn coil 4.0 cm lonznar (w9:+s ieg to generate a 1.0-T w:9z(+is neramagnetic field at the center?

  How many turns should a 10-cm long solenoid 7e2 h+0*hs/c/zjc zrukq(h kwhave 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 turns that cano,wh8f(5au* k2exfm rries 6.0 A if its(, meo 25kxhffau8w* n dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m t1 2:hx kq) z0dy4dabois in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. xko40 a2d1dbh )t:yqz What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crosan 7y6 0v)roi 1bcx; k0lt7fkss-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 current of 2.0 A is in a magnetic field of 3.5 ;po*(pw6p vih T. Th(vhpppw i6*o;e loop 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 is in a uniform magnetic field of 0 utj0,3v5k cqh.30 T. The current in the loop 3v0jt ukh5qc ,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 s4 dg; jnr(ns 8f6pp 0v,igj1j+vb*nqis in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic tord ;ns,j fp0nn6 (gp bvrgs81j +4*iqvjque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of : f;b6io bb1yfarea $0.25 \; m^{2}$ 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 sin1s,89i:kos tv7 r5l ib+ocsfegle-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 q o.; ox*upd7moseqvkb67k6 1 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 of 1.v9yal -y-c0y f0 kV and then moves into a magnetic field of 0-l y0- acy9fvy.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. l eich rx(*yylmk70ew .39d9u It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the ra 9 keyr(h9lu*lx0mc e7y3 .widdius of the path it follows.

  A beam of electrons is accelerated through a *xe1itlb-nmftj i828 potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity select8x e8b 1-lit2 jf*nmtior has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?