If the north poles ofmg, k5msw ks st141cy) two bar magnets are brought close to each other, the magnets smcs54 kw1 st)k1myg,will

  If the south pole of one bar magnet iott( 2epafs/*s brought near the north pole of a second bar magnet, the two magnettp*t2asf/o e(s will

  If a bar magnet is dividedpax/4cdpyy (; into two equal pieces,

  The Earth's geographic North Pole is mamz2 :cl:-picyi,k wz,gnetically a

  The south pole of a m-dqu/ n c4;vpmagnet points toward the Earth's

  An electric current producg+qwr w:p9 c.pes

  Which of the following is co uwkb*ui n;(8t1xu 4nmrrect?

  A vertical wire carries a current straibusc k;45fvkegjup zbam+e 9210 2 *zaght down. To the east of this wire, the magnetic 2zm*vge+f42 up c5z bjs ak;9eku0a1bfield points

  A horizontal wire carries a current straight toward you. From1gso oev ce/z/;9p2 tz your point of view, the magneo / sctg zozv;e29ep1/tic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from 4i7cgxljfq q 9r):yh8 above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, out c)9x:hy4q jrfqig78lside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a t43dhik/:bh :oa0k9g f u*eczy k5hp2iable 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, inshu:k24be* hkah 9g y i53f:/ po0dcizkide the loop? The magnetic field

  The SI unit of magnetic f,q7tx,plil07me7cik *7cr xrield is the

  1 T is equivalent torzg m82fbpaa4b,0 bg.m b*d)a

  The direction of the force on a current-carrying wire in a magnetic field is deskev:zncu0h qkm vgx p2 8rs.d8x+:8 +rcribed by which of q:+cux:r 8n+h 2zvpmk dr0x eg8sv.8kthe following?

  The force on a current-carryingtln2pz1v(6r z*xly o d bc, 1yed7:0xi wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is eq-pr4 z:6u a nd y*a6aeuz8s*ofual to zero when

  A vertical wire carries a current straight up in a region where the ma)alb6he hjl9p z48 9a78bkt lygnetic field vector points due north. What is the di9labllp69 h 7z )kyb8j ahte84rection of the resulting force on this current?

  A charged particle mo(x ole zv0/93lbn d zee53cx.eves and experiences no magnetic force. From this we can concl3o0x(x3 z llnee. evc9zebd/ 5ude that

  A charged particle moves with a cw/nnrkj7, nf3 onstant speed through a region where a uniform magnetic field ifwj3,n kn nr/7s present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a,6ku- -w hiwh9w1ejg a constant magnetic field. The magnetic force on this -1kgh6 9w,w hiaje-uw particle

  A charged particle is injected into a uniform magnetic field such that itsgws,+ x. ix5pm velocity vector is perpendicular to . s,5ig+xxpmw the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a univ5+bf tu002 rl:lftrjt vjz++form magnetic field. If the particle had been traveft0rf+5t0 vv+z2+:lrtl jb ujling twice as fast, the radius of the circular path would be

  A particle carrying a* get(mwu9 cx( charge of +e travels in a circular path in a uniform magnetic field. If instead the paxumecg (( 9t*wrticle carried a charge of +2e, the radius of the circular path would have been

  At a particular instantt,a 7yw xw.,smwx7 0iv, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force thwax w.7 mi,0yt vxw7,sat acts on it is

  An electron has an initial*ww; 1iy/k:0cmcru mx velocity to the south but is observed to curve upward as the result of a magnetic field. The directio rkccu* yi;1m :mwxw/0n of the magnetic field is

  An electron moving along the +x axis enters a regio/x jm hb /0wci*zic2x:n where there is a uniform magnetiwx /*:j x2zmbih0c ic/c 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 page.)

  The magnetic field produced by a long sb9 uml6zx0xt:fw5+a itraight current-carrying wire is

  At double the distance from j1k-h : doaml0a long current-carrying wire, the strength of the magnetic field produced by that wire decreases d lj1:a-o0 mkhto

  Two long parallel wires placed side-by-side on a horizontal table carry identicajp1xim c5 b6z1l 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. From your point of view, the magnetic jx1b 1z6m5 picfield at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on amb0uw6)oj )9cv7 w w,x4oyelm horizontal table carry identical current straight toward you. From your point of view, the mam wo 7,ly) w4xc0u 6bwemj9v)ognetic field at the point exactly between the two wires

  Two long parallel wires carry equalk jzh-z1v91dbz r+c,g currents. The magnitude of the force between the wires is F. The current in each wire is nodgb1 -zcz z,v khr19j+w doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves j 2gnk0ad*xo 6toward the east alongside and just south of the wig n dox2j6ak0*re. What is the direction of the force on the proton?

  A wire lying in the plane of the page carriim;2ol me o)y)es a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlyo2mloim);e ) y toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed si/j; eybdy,nc)de-by-side on a horizontal table. If the wires carry current in the same,nj yyecd;b /) direction,

  Two long parallel wires are placed side-by-side on a horiyd*qqkzkfz-4nhx cr:(o* j sfhf*11 1zontal table. If the wires carry current in opposite directionndqz (1fxc*qz*h: fyk4r1k- h fj*1sos,

  Consider two current-carrying circu8j79wriw .n axlar loops. Both are 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 center of the smaller loop, the magnetic fiel7j 89xn ri.wawd at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made fm4r74kp1upr8b .b l syy. cj+nrom one strand of wire and both carry the same current, bups 74.1yc kpmrn r+j8 blbu.4yt 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 when the anjo tdr( w:n:ayy-7 .z5:a uzmwon d;t0gle between the loop's magnetic moment and(nru0zawo;n a doz7j:yt5-wm:y.d t: the magnetic field vector is

  When placed askew in a magnetic field, a currer :(zvuix 5(x,c24ojcoq ox,o te(5aent carrying loop that is free to r(o2 qxa: xc,erc uoj5 , (5ixtoe(vo4zotate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the7haud-rq) 3a q operation of essentially all electric motors?r)dhq7 q3aau -

  A circular wire loop lies in a horizontal plane on a tablew;h zgvx z8+h3 and carries current in a counterclockwise direction when viewed from above. At this point, the Ea +v3xhw;zhg8 zrth'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 mass m and charge q is accelerated throt8 v)krg9+k s +9zlldmugh a potential difference V and allowed to enter )+tg8 dv+k z9r slmkl9a 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 ch(fpew /co*73web dn .yarged particle passing through crossed 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 fol 37/yew*(wbcp done.flowing, 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 cu3)0 s/8k0 xph mdvv,x 8t dgos6rdyal6rrent of 0.60 A is oriented parallel to a uniform magnetic field)r8h kv/x6pdsx8ga lm,6 d3y0ot vd0 s of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction o3/3v/ghmnju gx2f y2oy;4y muf $30^{\circ}$ 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 isy04lg /s1brzr+sumzd1l .d. n placed in a magnetic field of 0.020 T? The wire +0l.ds1rymd unsl1 r/b z. gz4makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of pl:+f qhh+u8h0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the h+ +8luhfqh:p rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What iirp.d q;-b 9pis the magnitude of the magn.-p9ip; di qrbetic 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 spm zucu;1 8mb4beed 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 ojb3 ceu0p r 5sn9d,6hpf $5.0 \times 10^7 \; m/s$ 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 travelin+uls1yjf mb c 0vqo3,,g due 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 win(ovh( y7eg( m nfk:6mk;7ali0lqk1 : k glup2th 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 magnetic force of the electron.

  An electron moves with a speeq1n ela 7wc.g0d 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 speedse/f.)y n9ruq0 cd5l4 ru ls(l 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 A. What is the magnitude sdg,9 guy+g0c pi2ls2xh+ owi 1m8s+wof the magnetic field at a distance of,0 +d2suiwmlcpgsgy+ io+ 2ws x8h9g1 0.15 m from the wire?

  A high power line carrying 1000* xdb6f3b94hsqvt ( :hlwv:z- q vgsa2 A generates what magnetic field at the ground, 10 m away?h*fhbg s la2t9vwb63-s qdx: vv (z4q:

  How much current must flow fnzc c5 hz4 r02fjlhyw;r-:bl 759ddplxhr. d) or $1.0 \times 10^{-3} \; T$ 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 the e *9dnyj.q2jc magnitude of the magnetic field due to the wire equal to the strength of the Earth's magq jey d.c*92njnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carrrlkfo3 ru/ +xr 7w:x6ny currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic fielrf3k /7 +ox 6lxur:nwrd 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 car*k6 ysw8ycal8ry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the yl8 6c8s *akwymagnetic field midway between the two wires?

  Two long parallel wirj o y.xfkq89cyd,g *(ies 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 arei,.* g(okxfj cyqy98d the contributions from the two wires the same?

  Four long parallel wires eimj(i8vo9g c 8ach carry 2.0 A in the same direction. They are parallel to the z-axis, and they pajo i(i9c8g 8mvss 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 wires?

  Two long parallel wires carry currents of 5.hx09qrux q*n8;p9tst 0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per ;xupqxnt0 h9*t 8srq9unit length between the two wires.

  What is the magnetic field at the center of a circzqk hi0ip6ovojv z9 v th4 4(+626lozxular loop of wire of radius 4.0 cm wh o+iqt6h l(4o v6x z2j0kzhv4voz9p6 ien a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wira2nobmn5iq5 gtn/k2 .pz*ll (e. What magnetic field is produced at the center of the solenoimgb2to( al5 /l inp nz*q5.n2kd when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carnyfbak 73lo4 6 cjf*qvlkke*,m * a8a8ries a current of 4.0 A. What strength of magnetic field will it have at itk* lkl3nyck 478 a ao,avq *f8f*6bejms center?

  How much current must pass through a 400 turn coil 4.0 cm loo uo(qx /4i(jc 4buej9ng to generate a 1.0-T magnetic field atooq9 uu( (ejb/j4 ci4x the center?

  How many turns should a 10-cm long solenoid havev j5xs9le ;l39 2acbqu 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 6.0 i.zmrtmnk -6elm :p4,x (kl-8jqop 9hA if its dipk6e r znmi-tj m o:- (9.xhql4,p8lkmmensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of d4l-t1m 6m;3tmsfoafd6tlis l 1f0 *oradius 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 to tmmtl 0 -64lst afld *;3 toi116dmosffhe magnetic field?

  A circular loop of wirp /yzu,pv3n7x xws- vi/ 7r.) qgicuq2e of cross-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;mz8zn.j 2lvw a magnetic field of 3.5 T. The loop has an area2 z;.nj zvlm8w 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 0.3r; pkva3j5v/r cj,9 oc0 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to trc 35pvrc k9jov ,/j;ahe magnetic field?

  A circular loop of wire of rqjqbx0ilwpmr* (+n7 o 8u yl,(adius 0.50 m is in a uniform magnetic field of 0.30 l(m jnqrlp7*q(,uy8 0iw+xb oT. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ayp, ggt- 0kr-e lzq4)irea $0.25 \; m^{2}$ 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,.ymk1i 3z o/vg v4 suiavb*/-x a 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 velocw/ dlyiwio6z u 8*9l/:i bk2ehz:k)o qity $6.9 \times 10^6 \; m/s$ 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 a7ot ql:vt- w niy+r13 kl4zy*d magnetic field of 0.0 +1o :z7ll v3ryyttqk4idw-*n 40 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field hx)x gw75an6f5cc;h vof 0.30 T oriented perpendicular to its direction of motion. Determ cxcn fh ;5hw)gx5va76ine the radius of the path it follows.

  A beam of electrons is accelerated through a potenteq s k4wqv9,xg 20qvb5w uxf.+ial difference of 10 kV before entering a velocity selector. If the B-field of the velocity sele9 e2 +bqkxvuqx50g w4sfqw.v,ctor has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?