If the north poles of two bar magnets are brought close to each other, ualu-n94nmn8yqzy;1 pnv0i dn d6;n 3the magnets wiqip4mnzn 69;u 1;l8anuyv0n yddnn3-ll

  If the south pole of one bar esk 0dj p7 /t7ey;zq(lmagnet is brought near the north pole of a second bar magnet, the pqytd e(;k07z 7e/js ltwo magnets will

  If a bar magnet is divided intxh; j y b4tq+(j25vjv i6wjd*po two equal pieces,

  The Earth's geographic North Pmoer j.*tllv o26,, qlole is magnetically a

  The south pole of a magn 6sb h*a7cq sqww+g44ket points toward the Earth's

  An electric current prodjq cx-cw /d9-muces

  Which of the followi4 m /aqoyb8/c:lluh -xng is correct?

  A vertical wire carries a current sy+ ,onfvor/u)6+db /d rn)cdadbu 9.xtraight down. To the east of this wire, the magnetic field poi.fu /x+ , cba))vdn6o du9d/bor dn+yrnts

  A horizontal wire carries a current straight g a)pb87vz3h , ji-zjetoward you. From your point of view, the magnetic field causejp7z8,ij agzb )3hev-d by this current

  A current carrying loop of wire lies flat on a table top. When vidklwoywz(1ahk279x af6xt5 2 4f c0emewed from above, the current mo 45fwz 6kyw2e x2 0mx9a 1(kflotdah7cves around the loop in a counterclockwise 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 wirvnt9i;/ fcn2zfhox:*i vh/g 1e 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, insidez*ic x9h1nfnotg hv v/f:2i/; the loop? The magnetic field

  The SI unit of magnetic field ir64m0dls *y(v)jm nxhy ,i-e ts the

  1 T is equivalent to,m6 ujt) ci/jw:w(h au

  The direction of the force on a current-carrying wire in a magnetic fiel/ 4.wwnbh6+vitluzd 0d is described by which of the foll 0i6uw.4 hd/wlnvbt+ zowing?

  The force on a current-carrying wire in a magnetic field is the strongest whaud2(z9d+c r uen

  The force on a current-carrying wire inmrfx0c/gdf8s4ua s47 a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region w,1(e4rnf uxs qhere the magnetic field vector points due north. What is the direction of the resu1 ,u rneq4(fsxlting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can sr(3/muq 0jeuyr(xyl m)4f /zconc(l rrejs(xum)m/y yq3 0f4/uz lude that

  A charged particle moves with a constant speed nlde; hks g+4m;s,v5hthrough a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the padh5g msh;4l+ves ,n;krticle moves

  A charged particle moves across a constant magnetic field. The magnett .hzcin 3ky2,ic force on it2yc z.hk ,n3this particle

  A charged particle is injected into a uniform magnetic field such that it6u -2e+mmyl u4hh9gcq s velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weuylqh gh26m +- 4emc9uight, the particle will

  A charged particle is obotnc8kibfa5xt. *, j6 served traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast,x*,8 n akt fco65.bjti the radius of the circular path would be

  A particle carrying a c )eti1smf r/*yharge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, ti* e)mt/1syrf he radius of the circular path would have been

  At a particular instant, an electron m8)uq1sn5*l 8vscihz*p 6)ids z dwmb-oves eastward at speed V in a uniform magnetic field that is directed straiswul -z)hcvzm8)6is 1q8*ddpsn5 b *ight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obslano uv -ga7(nz6m2 /cerved to curve upward as the result of a magnetic field. The direction of the magnetic fi2nmv/ao ca6-ng ul(z7 eld is

  An electron moving along the +x axis ez+gpjg1k u v,nv;) *gjnters a region where there is a uniform magnetic field in the +y direction. jv1* )ugkvgnzg, ;pj+ 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 pr l30xm/et1rq7m bh15qtg5lm soduced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mat t);gn no4z2iq 7q.xvgnetic field produced xtiqno.4tgq2;7 z)v nby that wire decreases to

  Two long parallel wires plavd 9) ;1tx u+nb tseqjhi;h*i)ced side-by-side on a horizontal table carry identical size currents in opposite directions. The wire oiv hi;)*nshj t1tud;+bqx) 9en 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 horizontjw*8rrcs cwf ;0s-. msal table carry identical current straight toward you. From your point of view, therscjwc s*rm;f.08 w s- magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal cur8 z t 6((8zgmca6h5yugufu +hhswb k06rents. The magnitude of the force between the wires i(uua f( wkhz0yh6g s tb cm6zh858+ug6s F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A prooa/uw zel+76 a+,tghlton moves toward the east alongside and just south of 7 a/ha +,wllu6goz te+the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bod5y n9g 0v:bfattom of the pagdag vy:5f 0n9be. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward 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,hhiclum b / ,sga k687cwz+c6. If the wires cz,h g8,+sa/l uc ib76kmc6 wcharry current in the same direction,

  Two long parallel wires are 3elex3c.sx qi;fw .) d*0 iaxkplaced side-by-side on a horizontal table. If the wires ca).lw;fa3x*icqi s de3x.0x ek rry current in opposite directions,

  Consider two current-carrying circular loops. Both are madoya+p5 rg i.k2e from one strand of wire and both carry the same current, but one has tw + a.opri25ygkice the radius 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-carrying circular loops. Both are made from one st4b ejd3ohln 1va 39n5crand of wire and both carry the sbcad435nelnov 9 31jh ame 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 ybp2,+a82vkxbv t9 ft when the angle between the loop's xpyt 2 9b,2fv8+tk vabmagnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carlr50rd j; fx4ql)6gyg rying loop that is free to rotate in any direction will experience a torque until its magnetic momenrj ) lgr d;y45lg06xfqt vector

  What fundamental fact underlies the operation of es jd-gh8e)32u0v l gftnsentially all electric motors? ) t8vgln23ud-hjefg0

  A circular wire loop lies in a horizontal plane on msaqsa:v/v /+tac en w:qt)00sr/;bx 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 torqua/v/ vqas;:0sn bsttq0wea:)x/crm +e caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accele*l l14rsp 13zfdpkol2rated 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 the velocity of the particle. Derive an expression for p2*old13 1lrf l4 kpszthe mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossed elect.kj++h0z lu xdric and magnetic fields. The forces exerted by these zhklux .+0dj+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 is oriented parallel to a unifo)uher bp;a wz:mp 8)3crm magnetic field o p3e)wz; ap c)8mrubh:f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current o6x ozhwtl8 h53f 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 carrying 5.0 A when it ytlbj/lt-c 49z uhr egb +y::.is placed in a magnh+uzc :4e-g tl/j b9b:tr yy.letic 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 liliid177 xi5/pw il5t 8t;u yvong has 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 td7ii 8 l/ t5 157vl;iyxwpiiufor the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magvg3z) iite2vl a fu8f**0)eabnetic field of 0.20 T. What is the magnitude of the magnetic force on the pefbvvze)*0ti2l f auai 8*g 3)roton?

  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 wigx( f-,tq g kxj;5m/kvj og;2t)uj/hxkp8 kb. th 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 speat s qik;0 u;9hobn72yed 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 north wituk 7y+;gg)kl4e)n g rih 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 d- 271zbbwxu yw00p :nqos*qf 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 wit0ohwhkupc/ d7+)+ adfh 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 o8ifd0;b6)up:rcz w vt+k7zn s f $3.0 \times 10^6 \; m/s$ 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 h sh(k t;dckvghti 5)*bq9n i88r:bl )carries a current of 25 A. What is the magnitude of the b :gtl)kh8kisrbq; n( d9)*itvh5c h 8magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whk z1 rv -4)gzpj6*wtix) dm)jeat magnetic field at the ground, 1)rv1xi)zj- kzme) pt4 j6*gdw0 m away?

  How much current must *m(4h , obfxi.eufj7rflow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance fro-l/ff ienwj,g/,c on hnr).5s m a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal c,. j5 /f nsf/ lhgrn)w,-oiento the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires j9eyr5xj*3 avcarry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane ofj9*3yjre5 x va the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currentg41u 9vap3jdp3 jzm0 us of 20 A and 5.0 A in opposite directions. The wir j9dj30upu ga 1vmzp34es 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 directionson )r, map(-c5+ 0r uzkv88otr vvxj4k. The wires are separated by 0.20 m. At what point between the tw)5oczpn k o+( 4j ar8vxrr,-k8umt0vvo wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction.xnzptb7(5 1mbgpl .h) 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 to the other wigmb57x( hp )z1pltn.b res?

  Two long parallel wires carry curren. b)8usln5dt v(ddt d8ts of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnevt8 dn8lu(db ddt)s.5 tic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop m- vx me mq68/vbh;k,(x6 df+jkxg s-sof wire of radius 4.0 cm when a current of 2.0 A fhx6qg;v/ d+ 6mk xkb me-mj-s,vx 8(sflows in the wire?

  A solenoid 20 cm long is wound with 5000 o3+4 :oym) qwle g5 suqskd/y0turns of wire. What magnetic field is pr wqd:ymlyes54)g okoqs/ u +30oduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and cargnb 9hws -5h+vries a current of 4.0 A. What strength of magneti-5+hw 9bv shgnc field will it have at its center?

  How much current must pass thyg )i5/qr fd50zlk 37ihs6 fbvrough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic )l 7655f3kb rvq/sy dhfgi iz0field at the center?

  How many turns should a 10-cmujri,ro3*v p1 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 rectangular loop of 120 turns that carries 6.0yh 9zj)kembm 7wa+z -q s11b;n A if its dimensions are 4.0 cm x s-zhwkm1aej q+zmy179; bn)b 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniforgewg xc-t3.khb,w0js ypuzmn7l(-k-)ipl3 3m 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 lo pg.ezj-) bh7x(g-3 tms-c0y l3p3 n,ukwkl wiop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional are1z.z;/ndtpgtrgk zm( 9h9 t (za $0.12 \; m^{2}$ 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 2.0hulru e,yv 11 d5c- uw;;vhiz3 A is in a magnetic field of 3.5 T. Thev;wy ; dr uzchu1-uhe5,l 3v1i 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 radius3dxc..uxg13l z ag.nt 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is .z3ngag 3c1.dtlxx u.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 is in a uniform magnetic field of 0.cw9s -b:v * f(u1 e6tqdmfgsx:30 T. The current in the loop is 2.0 A. What is the magnetic torque when th* u:fvsqe(:s wb6-gtm 1c9f dxe plane of the loop is parallel to the magnetic field?

  A circular wire loop of 9dlbs d5 ;f. q3tsw2ykarea $0.25 \; m^{2}$ 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 parti3cvm d-jkimt;m x s-a9yq;z*) cle (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 wlinpk-xo 1;u0ith 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 1.0 kV and then moves into a magnetic fi*mjuaslf n66x8 cqz 9-eld of 0.040 T. What is the radiu6*9cs z 6lum -xfnja8qs of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fieldzrwk)6 rq n/ 8/dvvv:)qbgl9j of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it folqvk9)n/j r gqdvzrv8w/) :l6b lows.

  A beam of electrons i m//cw80o6kq m ftvb4js accelerated through a potential difference 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 recmqv 0w68j t4k o//fmbquired if the particles are to be undeflected?