If the north poles of two bar magnets are brought close+r-j9ulkv*(xtnc4vu p i t47s to each other, the magnets wvjkxv 49-(l47i*tnt pr u+csuill

  If the south pole of one bar magnet is brought near the northqh,:91; : ecqkrdrw ub pole of a second bar magnet, the two magnets r:h kqwqc:,;ub r e91dwill

  If a bar magnet is divided into two eq0;lkfhc0 89e x6bp pj u6fsul.ual pieces,

  The Earth's geographic Ng r,n3mi9 v5;gbtv 8gu os7o6qorth Pole is magnetically a

  The south pole of a magnet points toward the Earth'p9 j a2uu *,tc35p kpl1*msnzks

  An electric current produceta32rv sp ,f-ts

  Which of the followingnchdbb-y9 15 2xrnn+dzud0( f is correct?

  A vertical wire carries a current straight down. To th2dk-9xryln /el)z -wce east of this wire, the magnetic field d -2wn9-/yxl ckle)r zpoints

  A horizontal wire carries a current straigha842s( g3j. ,x 1j qmmsw,sdqepcirm4t toward you. From your point of view, the magnetic field caused by this curren(am8crsm441.dq3 jexsm,2i ,q s wpjgt

  A current carrying loop of wire lies flat on a table top. When viewed from aeyhk l/vk7q29 bove, the current moves around the loop in a counterclockwise sense. What is the directky72l qh9v e/kion of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying cirxh67bu0 z8tnnn4j0h pf *rst,cular loop 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 magnetic fiel ph*,4husn0tftzn68jbx7 rn0d

  The SI unit of magnetic field iv.fl bpx tx*03s the

  1 T is equivalent top ea+6m6wg v3rre ue* dt(9-ko

  The direction of the force on .m tcdp)9m+ji a current-carrying wire in a magnetic field is described by which of the f c)dj+mmt9i.p ollowing?

  The force on a currentelk 2fj-86y lt-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to ze gy 3x5wz2pei0 8oqd1afrh.7;1kooq h ro when

  A vertical wire carries w xq7y1f15cfvk,rfvx jwh b7n5u,8 -mzqx5q 4a current straight up in a region where the magnetic field vector points due north. What is the direction of the resultingu4vn zmqq- 1bk,rxc,x7 f 558wfvhx fwjq7y15 force on this current?

  A charged particle moves and experiences (0;* zqkwmancno magnetic force. From this we can conc( a cm0w;qnk*zlude that

  A charged particle moves with a constant speed through a region where a ui+gal-c vuf 4yu rhtwt-v;0 9p+/n4fyniform magnetic field is present. If the magtli4nfaryuuvt;w-+ f04v9gyp +/ -hcnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnp 0fmuf*8t77x79nml mu0 vsit etic force on this pa*90 7s7pnufm7xf 0t8 mltumvi rticle

  A charged particle is injected into a uniform magnetic f w8)* cm52 u ccsfv(qf-sgaxm1ield such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wilcgqcw8)v- 5fsx1(*ma2m sc ufl

  A charged particle is observed traveling in a circular x ,(k26y mm,1xi dzuzo8 ii, 1elcvrjy37s1mspath in a uniform magnetic field. If the particle had been traveling twice as f rs78id ,c1,yi1s6mmxl 3kjiu21zy,z o(evxmast, the radius of the circular path would be

  A particle carrying a char2/3cx-j/sf*.7k nk lq dts ihvvo6 3fzge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the rcs/sv6 t.2l dvk-*in zq j 3o3f/fhk7xadius of the circular path would have been

  At a particular instant, an electron moves og;p/0+-ov c9rx nm neeastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic fon9 rn o/c+0;gm-expo vrce that acts on it is

  An electron has an initial nxj9/p)g sjxo2 :ti0in/ub m5velocity to the south but is observed to curve upward as the result of a magnetijjs t9 i/bp o0gm2ix: 5n/uxn)c field. The direction of the magnetic field is

  An electron moving along the +x axis entxjzq wacp*3r,6f+t6 p ers a region where there is a uniform magnetic fielf *36ajpp qxwctr,+z6d 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 current-ca a,faqwr/o,7sh 8;fpp rrying wire is

  At double the distance fr( mml3 l7zk(xwom a long current-carrying wire, the strength of the magnetic field produced by tha37(w (lzkxmm lt wire decreases to

  Two long parallel wires placed side-by-side on a horizoeran* 0)iu7 idkl-m0qntal table carry identical size currents in opposite directions. The wire on your right carries current toward *n mud07ki i-q0)laeryou, 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 b*25k,dju t+xc ,idav a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly bet t dvx ij,5ku*,c2b+daween the two wires

  Two long parallel wires carry equal currents. Tw8k:)v :*yj -9 xcspztnh, itghe magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magniyxc:v9 g):twph,-t n jki s8z*tude of the new force between the two wires?

  A long straight wire carries current toward the east. s.51 p)nn;riab w8vbm qf)7iyA proton moves toward the easqw )8sivbib1 )7 pnf ra;n.ym5t 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 pageoh6 bvuj(p-7 z 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 perpb(vu6j7zo-p h endicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-sido(gl opwb2 (teo+bbt )fu)beuq3+ -s2e on a horizontal table. If the wires carro+bo ()-3w+fbsu)t2tqgubb2e(e o ply current in the same direction,

  Two long parallel wires are plaoldui0b b0f gg /d245aced side-by-side on a horizontal table. If the w2od0 4dg5/bbfi0lau g ires carry current in opposite directions,

  Consider two current-carrying circuk k0 tj+0tgmo8lar loops. Both are made from one strand of wire and both carry the same current, but one has twice the ratko+j 08kg0mt dius 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-waa w:4q+i.js carrying circular loops. Both are made from one strand of wire and both carrsw +aiw4: ja.qy 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 carr g:ifvj565cmbcan. 3v ying loop occurs when the angle between the loop's magnetic moment ang5:jm a v3fi6cnb.c5vd the magnetic field vector is

  When placed askew in a magnetic field p 35v-/qoq alb0t dq,f3 kdsun8i6ml2, a current carrying loop that is free to rotate in any direction will experience a torqu63 tsnlkliu5qqvdbpa3 o208- dqf / ,me until its magnetic moment vector

  What fundamental fact underlies th 5 kn7y- q5;imtkxso5,gqf1h*b+yts ae operation of essentially all electric motorsf-ay5n h5x7 qtg o5im tsy,k*k1+;qbs?

  A circular wire loop lies i7u seu 3 ihvxm:4f)wu5n a horizontal 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 uew 3im:5x 4h7f)uuvsside 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 part3z3 qf2 zp)dzwicle 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 z )dw33f2pzqz 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 9 id+rqqmn0 1)syt.uycrossed electric and magnetic 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 followinyt9 qu0yi.1n)ds+m q rg, 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 0r3 gc,x .bu3cx.60 A is oriented parallel to a uniform magneti bx33x urgc.c,c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current rs 5bwxzb2o1ck68 adut-ij h/)/h7yfof 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 j o;j-h m-ymh* kyo+y:a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 -+ *mj hk;:-hooyymjyT? 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 ik2w7elh*vda ( +pvcx7j (ksabx:1 n.gs in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the ml 7n kh v1a sk(ga:bxj+ (ew7dpc2*xv.agnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 azir91ept8y gdnn.)bd90t fc ah 1 1o*T. What is the magnitude of the0dbgeni1 9npda 1 9o 8t*1fythzc .a)r 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 9 hi-jmyj28d l s9:-h:ijnqklspeed 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 speeot-j5.y :n0rawpv,ysd 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 ng /e o39ne(gtmj/g djzm 8:g,ev8d2k aorth 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 i,0wugzp ii82of $8.0 \times 10^6 \; m/s$ 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 speed omc z,-j)ut0wp-m wu up1ny v*78 6kpctf $8.0 \times 10^6 \; m/s$ 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 speedlzb o*b7m:3 +lr7fvnr.jm w0 o 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 car;*jj nwh92+y1hxar zpries a current of 25 A. What is the magnitude of the magnetic field at a dista*jz2jrhwp+ 1n;9xy h ance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fie)( 89vlhq zd2 x.ulyldld at the ground, 10 m aw ld9lu(yxz l)hq2 8.vday?

  How much current must flow p+w ya1zl*c(k 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 wfg08:x+l z5)ki tzt yxire 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 mag58t: tikx0z fgy)zx+lnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They jo;,. 0chelzzare separated by 40 cm. What is the magnetic fieldl.oze,;cj zh 0 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 directions. twxt 5lm vd+q5*y9ds:+)no yv The wi5: dmxn o*sdyl )wv+v+59y tqtres are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry cm pdd- 90l/zmcurrents 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/0m lm-dp9zcd wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are wc c*.c3cbco9mvb3t7 parallel to the z-axis, and they pass through the corners of a sq9m3vcc3c*7 b. tb ocwcuare 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 carry currents of 5.0 A andg7(k-z; wvun*l hmc ,n 8.0 A in the opposite direction. The wires are separated by 0.30kmvn (;h-glz7un*w, c m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular tdu bo h:gd:0*n:8mpr loop of wire of radius 4.0 cm whenm08:hutp:o: *bndg dr a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. Whatr5+xi+p3eb 7zj);mn t gjdi/n magnetic field is produced at the center of the solendemt x5 / bjrignnz37+i)j;p+oid 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:) y:jk v.q0w(vuvutkahz 6.o . What streng.v.tw0ha y6:u) kvu q:vo(z jkth of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to gentuuh ghug.l 760hl:mu2q.l a4erate a 1.0-T magnetic field at th:. 42ua gutqu l6l.ghu0hmhl7 e center?

  How many turns should a 10-cm long solenoid havatmb). * iotp*qjf4g,e 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 dx* w)sao9u;u +ooby+rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4o+ywso oab9)+ u;ud x*.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 v:y2h( p epe 2ksa0bb, du/uv/T. The current in the loop is 2.0 A. What is the magnetic torque when the plaek u /(bd,evp v20:uyhpbs/ 2ane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cro5tnnbg/xj h5q3m2i f )ss-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 carryinvv1bgcm ;zgf5m 2vf* 2g a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an arvg1bv ff2zm;vc*2 gm5 ea 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 i 6z bme,rxr8hb4+xi- fs 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 ofrbh -x m,84 er6fz+ixb the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 7y4j0 2ndmw og0l;iu gm is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 mw yni2jd4gg;7 l00ou A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of cbljp)1 (qebsb irli*.u+aw 3*:enj5 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, a60il(2zvveyaxr w 6r/ 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 veloc8 vt,w9aevy3kj 0rn16rne t1nity $6.9 \times 10^6 \; m/s$ 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 mx a fy uos9/.kzzrk8*2oves into a magnetic field of 0.040 T. What is the rauazxfor9 *.y2 zk/ks8dius of the proton's resulting orbit?

  A proton is accelerated from rest thro )x6rwuww4i4 p ba+x;nugh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine t 6 puxbwwawin);4+rx4he radius of the path it follows.

  A beam of electrons is accelerated thro3i qsf(wz/ob 3pegvt 64 +gr.tugh a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.01e63qti4 zw rv3 +.t(pgo/gfbs0 T, what value of the E-field is required if the particles are to be undeflected?