If the north poles of two bar magnets are brought closet,ziybt50cjx8hm ** 2x lkcc0f om*c: to each other, the magnets my,*t :05k f icxoxc c8*mhtlj*z0cb2will

  If the south pole of one bar magnet is brought near the north pdzv19mbl ( km)v8ip hk63g3qh ole of a second bar magnet, the two magl ) 9vhv1g 3k6( qp38bhkmdizmnets will

  If a bar magnet is divided in-1welm 32kbjs 9p;f lxto two equal pieces,

  The Earth's geographic North Pole is magnezpt j1v c i2kj fe5;ayhn;(5i71;ok ddtically a

  The south pole of a magnet points towa;agl -b(w u1ep4a3dbr nmdrsmo1w .zp o .(.j9rd the Earth's

  An electric current prodo+gy *bm;2b/xscz s a:uces

  Which of the following is correct?mn.kaq5 u hxp/ mcdhsv, fm(p rr(5)*(

  A vertical wire carrq-5)r8di2xwi ij9w uvh )s.goies a current straight down. To the east of this wire, the magnetic fiei.i riqosx hv)2w-d)89jg 5u wld points

  A horizontal wire carries a current straight toward you. Frow f-: jk8 ml-jkh6my+)y riy3cm your point of view, th)h-:jl y6 3jwm 8fkr yk+i-ymce magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed froj li,cg1 i;kcm6;n.e im above, the current moves around the loop in a counterclockwise sense. What is the ,1l;6ciiegjc k;n .imdirection of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop ofqa9oog);ms ;1 i9ncv p 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, i;oq9s) vo1;nm gc9i panside the loop? The magnetic field

  The SI unit of magnetic field is t ;atf ;*zoodn4he

  1 T is equivalent to*pi/rfyd- r (vw,:onu

  The direction of the force on a current-carrying wire i:vrxdgzr,,:y n a magnetic field is described by which of the follryx,z:gr d:,v owing?

  The force on a current-carrying wire in a magnetic ibb kg86d 5/0ngyi uo2field is the strongest when

  The force on a current-ca 0e .y9h6jbhavrrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a regi9 )0q aj(jvzy )-5q0+zuyfggt( prvuuon where the magnetic field vec-agtu ) z z)guqj0f(50p(+uqryy v9vjtor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experda gpmy0 c c mlag6k;3kf75a:5iences no magnetic force. From this we can conclude td5mylfccg0 m7p365k:ga a;kahat

  A charged particle moves with a constant speed through a region where a uniformh6 qnrpael85 7 magnetic field is present. If the magnetic field points ste5786 nqrha plraight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle m,*cc e n1+ufvmoves across a constant magnetic field. The magnetic force on thieu, *fcmn+c 1vs particle

  A charged particle is injected into a uniform magnetic jcs r+du1t.kj96zw w4field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weigh49.wjz+ stc juw1d6 krt, the particle will

  A charged particle is observed trcwm(o95 g :bfkaveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of cbfm:w 9(g 5okthe circular path would be

  A particle carrying a charge of +e-zp azvk2o 0zwdf/1+vh o;p3zsak n*) travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular pazs*o)w2+1d-/p fa3zp vnv0zk koh z;ath would have been

  At a particular instant, an electron moves eastw+.sogex.p dmfp7,r0 k -aevb(ard at speed V in a uniform magnetic field that is directed straight gfkd(.bxoprm.-ae+ ,sep 70 vdownward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cur1.anhu)e4rillt x 9, qve upward as the result of a magnetic fi1 )tlri,9e4uh.xa l nqeld. The direction of the magnetic field is

  An electron moving along the +x axis enters a regiop 6apbd-s9/vcwac(dp +s.x9 o n where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x c+9.vs-pap/(b6s pax o9 dw dcto right, +y up, and +z out of the page.)

  The magnetic field prxke7b 44//um v(yqm,ts0vrnmun3 gn*oduced by a long straight current-carrying wire is

  At double the distance fromamx (cxkc f2rr99k723o;dsm w43plzg a long current-carrying wire, the strength of the magnetic cf2 3mlr(xk249 9mx 7os;3cgdkrwpazfield produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carr7sjue7b .7vf7cqx ;oo y identical size currents in opposite directions. The7j7 x7f se v7o.qbouc; 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 point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tabl+3zv qs,weat* e carry identical current straight toward you. v,e* wqt3 as+z From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry gp1jo h4w x(*xequal currents. The magnitude of the force between the wires is F. The current in e( x gop4xwhj*1ach wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towart+k q0gp9u9 hgd the east. A proton moves toward theu09q 9+ kgthpg 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 pgf* z0vn m1 o84z,wwta current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly towaw n0o zz8t,gf *vm1p4wrd 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. r iul4x b;b(hq b305cmIf the wires carry current in the same direction,4lu hm;rc5bx3( b0qbi

  Two long parallel wires are placed side-by-side on a horizontal table. If the dt wu)x25qdt a ff8-.1 vdyq5jwires carry5fwvd2d)t5d 8u .fqt y jaq-1x current in opposite directions,

  Consider two current-carrying circular loops. Both aresvapwm ;/:s2;mbc 8 dc made from one 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 c/cm;w;a msp2 s8bv:dcenter 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 strasze w os28+8rfnd 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 thzs8e + 2swofr8e larger loop is

  The maximum torque on a currenc w8(flh kc+0+fgwqs 1t carrying loop occurs when the angle between the loop's magnetic moment and thkw cc (0gfs+ lfw1q+8he magnetic field vector is

  When placed askew inzwbh j g9c-3-m a magnetic field, a current carrying loop that is free to rotate in any direction will experience a torqbm - -zghc39jwue until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motorabok/8 khshudv( 2 h-(s?-bd(uv ao8ksh/ 2(hh k

  A circular wire loop lies in a horizontal plane on a table t1jyjk07l7g3 ftmffchx7 g5.0)lx me and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dip1 gyj07cm xfhf0 jkf3x7tl lemt75 g.)s 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 partqs7tw51ba9n;/*k8lmm orup dj 3ma:hicle 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 is uniform and oriented perpendicular to hb /t*q5rmlwum omp:j3k917a;nd 8sathe 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 throug7ty ccgwt+l j 8.y3szjot (-*gh crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only w -73to+g sz.t j(jlyg*tcc8yparticles 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 maw *- /b3rtb n)ibwek,igneti)nb-wi 3er k,i*tb/wbc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofwjsi9 l 56w6lg $30^{\circ}$ 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 zwd5b 6y v(lxwls7i+; 6:g/:l aa hgwbwire carrying 5.0 A when it is placed in a magnetic field ofi(z hs7g g5lx:y +w/wa l;a6b6 :dwvlb 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 ha h/ f2u*nassck yw7f4(s a mass of 0.050 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 ckaffs/(n* w4yuc72 hsancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the crqft84o 1t*zl.6u(u jev1my magnitude of 4v.jtmfz e 1l1t8uco ur(6*qythe 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 witv5*q3c5s;yo g6 - fnsi,wmh1czlo7ej h a 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 a s4crpj1*r.y 6m7r c u uoed da3,:ighn/peed 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 d37ww.4kqrde btc (o g)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 spg7t,duxba3cn dp :d7:eed 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 witce 4io9d6y dl c(yniyl ryn3n8 5c95l3h 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 speed o4 z scmnz/)k7cf $3.0 \times 10^6 \; m/s$ 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 carr0u 9/y vcg1g2 -qh5vrwkx7 xsdies a current of 25 A. What is the magnitude of the magnetic field at as7xv yk 1/hg-9wx2qu r5vg cd0 distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whli.h.qb0*sqm1ret :q at magnetic field at the ground, 10 m abt.1: .semq*lqrqih0 way?

  How much current must flo 5*n7;aea*momnwx1b9ifsn k :w 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 then:0s/fztmra 4 o mhc0- magnitude of the magnetic field due to the wire equal to the ntr /hz4co0:s- mfm0astrength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wire,qbsp gfovc64(. cp( ps carry currents 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 is6 sopcpf. bp,4gqcv(( 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A jk)gog mk, )w yh7g ,xe.(ug3xand 5.0 A in opposite directions. The wir,hy.k)gx ,xkm e)g gg37(jwuoes are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents ofu3z0jmy1 i,o6:gomnj 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between 1n jmozim0o u,:j6g y3the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direy 9u xfco/ga21ction. 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 t x 1uoc29fyg/ao the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in nkok:tk9r8a f 5y.6p rthe opposite direction. The wires are separated by 6atn:k5k po8rf.r9yk 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magneticty+)gc;kqs 9zat)uv, field at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0tzy), )tg; c9ks+a vqu A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magneticqyayrc,sd 3duy6e)+4 e8r w(a field is produced at the caed duy6ry+qe)(rs 8wy4ca,3enter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. kn cc4t1aq,5 wWhat strength of magnetic field will it tw4ac,n qkc15have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate tfbx4b;ow +r)i v4 i56zqb 4g8qw d,qva 1.0-T magnetic field at the centewxrb o iqfgv54vi6 )dq4z;b+8w4tb, qr?

  How many turns should a 10-cm long solenoid *so im9bazb,m, i2q vfwurb69 i(kb. /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 turnuz1n71( f x ih82ychius that carries 6.0 A if its dimensions are 4.0 cm 1f7nxuc2iyh(8zhi1 u x 8.0 cm?

  A circular loop of wire of radq;h rma932u ndius 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 perpendicular 3uqrn 9h2;amdto the magnetic field?

  A circular loop of wire of cross-sec3l *qm .viruo2tional 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 currentb2w2/3pidj*2 jj)id m,zpv sl (r7bzj of 2.0 A is in a magnetic field of 3.5 T. The loop has an area ofb 7)/vbj jdw*p2r3 zj sdi22 jilp,z(m $0.12 \; m^{2}$ 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 unif4*v/x nmvlk-g orm magnetic field of 0.30 T. The current in the loop is 2.0 A. Whgnvm v*/kl4- xat 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 is in a uniform magnetic fij+31 lgw y5okzeld 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 parall 3ojlw1 +zgy5kel to the magnetic field?

  A circular wire loop ;wv (1omz1*q6z 2jo ehdejj1h of 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-charo-by6*+rsjl:x 1oux:g.rwy q ged 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 velocitjit b78a5 n.3z0 xgpmy-fa;iby $6.9 \times 10^6 \; m/s$ 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 throughegn qzz1z vu 48n0up/7 a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resunnup v8/ e4 zgz10zqu7lting orbit?

  A proton is accelerated from rest through 500 V. It enters a vpxmm4 q z95h:magnetic field of 0.30 T orientedm mq5hp:xz49v perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differejdh( )vc /0dhhnce of 10 kV before entering a velocity selector. If the B- )hjv 0hdc/dh(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?