If the north poles of t 0,1ppym0fwf-i+pv jnwo bar magnets are brought close to each other, the magnepnf0iwj 1-0pf ,pyv +mts will

  If the south pole of one bar magnet is brought near the nos7z4nfj/qm0iliron s4c+e*mm+f( 5 orth pole of a second bar mmsr /o +f 0omc57z*lq+ii 4 m(j4nesnfagnet, the two magnets will

  If a bar magnet is di1b6d+i;a7psx . y oqztvided into two equal pieces,

  The Earth's geographic North Pole i6u q.s: cy-tuss magnetically a

  The south pole of a magmp+1n( / ,tzcleq.u.x lyx2hw y,ext+z r-f)c net points toward the Earth's

  An electric current prov5n:jk 3u 2l hqr;8u4 md9e1ka yanr0vduces

  Which of the followi22ho n0)qlog6je+ wru ng is correct?

  A vertical wire carries a current straight down. To the east o xk/gd1( xc-jof this wire, the magnetic field pokjxc(1x- dg o/ints

  A horizontal wire carries a current s f5l ze;4.tciltraight toward you. From your point of view, the magnetic 5clt 4 elf;zi.field caused by this current

  A current carrying lozsrb45vfk ,x+ op 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, outside the loop? The 5fb+ sx,kzv4 rmagnetic field

  A current carrying circular loop of wire lies /k)ey/sj*w+hklv5ql flat on a table top. When viewed from abosjl *eq) k5 yh+/vl/wkve, 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 tkkh2 *y.8 imsjn)u0fw3y: id bhe

  1 T is equivalent to9w b af6xza9e;

  The direction of the force on a current-carrying wire in a mags8loj3wg - m4b -ub)en7om;x hnetic field is described by which of the xo4h em ls)mb7 -j-8;3 ungwobfollowing?

  The force on a current-carrying wire in a magnffv.6v vht-d)t z10h 4h bv v6dy,)vpletic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero wh 4i syy s:6xn;svm,.zoen

  A vertical wire carries a current straight up in a region where tz,qk*3f n5b gche magnetic field vector points due north. What is the direction of the resulting forcen5cg k*q,fz3 b on this current?

  A charged particle moves and experiences no magnetic force. From this we can *(zs;s8dxpfn conclu; p nzd*x8(fssde that

  A charged particle moves with a constant speed through a region where a uwo odec6 )*mi0niform magnetic field is present. If the magnetic field points straight upward, the m)odcw *oime 60agnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a conste,h5 zfxs8 zp 9gc:px-ant magnetic field. The magnetic force on this particl8x z5zg h,sp9exc-: fpe

  A charged particle is injected into t: no nwbp4snctpa,k0; 8qwg+9 yp;9aa uniform magnetic field such that its velocity vector is perpen49 atcpw nknogq wy;tn0,8: b+ap9p;sdicular 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 unifo25*eqg fz*/sc3tu wiyrm magnetic field. If the particle had been traveling twice as fast, the radius of the circular path u ztf*w5eci3/qs2 yg* would be

  A particle carrying a chh( 4fl .9buoiwlh*pwj6,i1gh..yoj u arge of +e travels in a circular path in a uniform magnetic field*1j6u.4 o.whuwogfjl l9 hybph. i,i (. 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 unifor. dxi0:jm t5xqm magnetic field that is directed straight downward. The magnetic force that acts on idx. qmt:j 05xit is

  An electron has an initial velocity to the south but is observed to curve u9lxzgsg 39l9s o a;7xxpward as the result of a magnetic field. The direz9939 xgls;gsloax x7 ction of the magnetic field is

  An electron moving along the +x axis enthxn-i;)3/4qlvxuvhiuu+- dz ers a region where there 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 the px+ivh3/h i4d nu; v-zq )ul-uxage.)

  The magnetic field produced by b /z+4 tfiya3vqjh57fa long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the kx4 pght; fai bp0f;0.strength of the magnetp04h.a0 ;;ix ftfg kpbic field produced by that wire decreases to

  Two long parallel wires : 7uz.hc*qu hdplaced 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. qd:*cz hhuu7 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 )e v+*d;g +.lc j: f.sqfv1ff 1pwijthcarry identical current straight towarddj* +f.)ge +.t1;: fspc fqvfjvi 1hlw 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 z /7qa0pv;g4 i:i qscgthe 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 g;gi0z qpq/4a7vs: icwires?

  A long straight wire carries current toward the east. A prvsoj: ;wt5qct3w /8sfoton moves toward the east alongside and just south of the wire. What is the direction of the force on th3 s scvw8/;q 5fo:ttwje proton?

  A wire lying in the plane o87;3*i ro)cjo/pdxbs/j nf 2( vcniptf the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularl ;nin7t*drpx/ j) vs2 jp3(icc8fobo/y toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a t1f*5xx1haw86* miu(g . )lu zgx deyphorizontal table. If the wires carry current 6x) ydetxu1 1 fgmi (wazxlh**g5.u8pin the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tablkw762kv;y)uyt 5a4, f k9a hq*jfrxwle. If the wires carry current in ohr awv9ft,a)*;lxwuykj 6 5f 2k47yqkpposite directions,

  Consider two current-carrying circular loops. Both are made from o/3w irhp deg sguj2v4*(eq6u.ne strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the s/pri2u q sgd*v ( 4h3w6.eegujmaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loop dvklp gyqajkz978a;0bw:); us. Both are made from one strand of wire and both carry the same current, but one has twi7a:b9;uzav0w djyk p )l8qg k;ce 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 anglehq281ndk2 dth between the loop's magnetic moment and the magnetic field vector isdnh2q kh2dt 81

  When placed askew in a magnet y2afht xampd99ybq6 j,:w.0i ic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic mq6 ibdw9. j2xfy hamap 0y:t,9oment vector

  What fundamental fact underlies k(a,rr0d+y.cr j i ao h3:4zhrthe operation of essentially all electric motorsczk.h 0yrad4( har +oj:ir3,r?

  A circular wire loop lies in a horizontal plane on a table and carries curre8p * ,s3 zab20yrbeulont in a counterclockwise direction when viewed from above. 2 zy pr8e0*3a,lsubob 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 field?

  In a mass spectrometer a particle of *j7:iottyl).j1)2ddn hav:hzu( ee:g l3iwl 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 fiel .1d ol*dl jvgh3 :a i7(l:2y)tuj) zten:hiwed 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 charuzkh j d3 es)s*1tgl3.ged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in oppos)s* d.33k thuegjl 1zsite 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 payb+2trf7f jsiu xg:;9 rallel to a uniform magneti79ugtys2fj+ ;rif:b x c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direrxapph1*sv q(;r vej4a5 ip;y:7 p -xhction 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 onkel 2 hrz3,x:h a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? Txzh :r2kh,3lehe 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 c. b*44cxuzs7 0bzlho kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight z07cs 4lc*buz.ox 4h bof the rod?

  A stationary proton is in a uniform magnetic field of 0..e0b1hvqfm , e20 T. What is the magnithv0eqf1m .b e,ude 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 speed bm+rna* t 2n 3cun*tu te6,to7of $5.0 \times 10^4 \; m/s$ 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 4q)w:* qq u-jzln2ayb a 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 dytm +xk. e//t: /jmcus,cc6ql ue 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 spe)xifs (av+j.8x vk-x fed 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 scof/hv296eupo slh aa/8p7os q5 k+ l2pvk47tpeed 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 speedb xa8 5xgp-w.jtv();j ,scaaf ih,er7 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 Aekpy 3np .b0 d4i78ajf. What is the magnitude of the magnetic field at a distance of 0.15 m pid7803 bn.yjepk4af from the wire?

  A high power line carrying 1000 A generates what magnetic field at the groundz 5xyu.hx7dci)8sfhv)d, 6j; cvog4y, 10 m awf hh,4ozx6u vvdc) d yg)cj s.yx5;78iay?

  How much current must tor+w6vm 9/n xu0z-e hflow 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 of 5.0 A is 1afrb jh:c4 t;n4,cqx the magnitude of t;q jc:c rfn1baxth,44he magnetic field due to the 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 A in opposite directions. They anwfggj/he 12, re separated by 40 cm. What is f/ g1eg2,n whjthe magnetic field in 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 currents of 20 A and 5.0 A in opposite diryp jyqh-d ;dl(d 5ni 24w*i6tzpp, wks)h(+igections. The wires are separated by 0.20 m. What is the magnetic field midway between the tw iyp64yg(l qpk, )ndwi ;+ jpts-hhzdw( *52ido wires?

  Two long parallel wires z+yy/)n7e igan d)f h-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 two wires are the contributions from the two wires the same+zyi7 a-h)ne dfy n/)g?

  Four long parallel wires each card f jdhp241ny*ry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of sidd1y 2j*fhnp4de 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 8q e *wzhf6,3vo.0 A in the opposite direction. The wires, 63ehofwvz q* 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 wire ort lgmss xb(j6j;jxn,,x 2 + z*qb7r2uf radius 4.0 cm when a current ofjz6lmx;tb nxrxj(2+br,qusj *g , 7 2s 2.0 A flows in the wire?

  A solenoid 20 cm long is 4jsylr92 8ic vim. h4twound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid whh9m j8.r 4i2cs4ytivlen a current of 10 A flows?

  A solenoid with 500 ks fqoi f*s; )imc;9w/turns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic fi ks9)f/ *ficsm;oi q;weld will it have at its center?

  How much current must pass thrhgl 6w4 u1pj1eough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fh4e1 j1gpu l6wield at the center?

  How many turns should a 10-cm long solenoid have if it is to generate3t8jb2/h 7a 5x m;r +aysmic1krub(cz 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 t8n x mjy-n;cb .:fnv-murns that carries 6.0 A if its dimensions ar n:xnbv8;y f-c mnjm.-e 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is i4+ xig,oginj+n 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 o,x+igjn i4+ gof the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional a*0ay)v)b kpin(x r/fdrea $0.12 \; m^{2}$ 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 ofiln045js,4 dq vy)8e et,g fom 3.5 T. The loop has an area otdn5fse)e4ygjl oq8v 0, ,mi4 f $0.12 \; m^{2}$ 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 rad6cf0ts/ eq ao0.btum/on3sp0y0ng l 5 ius 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 ths0qg tb0o 6035/lnc0 eu.sma ofnytp /e loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of mfj0y+ 7 +kswa0.30 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 may+ +f7mw0 jskagnetic field?

  A circular wire loop o.sd5-xd ae fzxa(l(;-w aokq3f 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 l 1gl39) )uwgpsa8aaiparticle (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 velocity *:x7k,92.ylhx4 pb k1we31iq s nkgvxyk:fgo$6.9 \times 10^6 \; m/s$ 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 2 gz8:p0f m5u 6.e4cd2mbdg0qx offbka potential of 1.0 kV and then moves into a magnetic fief beud gg c d06z8m.25fpkx2qm0f4:bold of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. I12frkh79u,2u1.i hti3 zu (o pz gqcupt enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the pathquz9ku7gof 2.ip1icuh1 (huzp ,tr3 2 it follows.

  A beam of electrons is accelerated through a potential difference n oji,fhcjd c5:/u1d8-o ju8r of 10 kV before entering a velocity selector. If the B-fieldojc8u d:r ,f/8i5 u 1o-hjdcjn 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?