If the north poles of two bar magnets are brought close to each other, the magnr /mo-u79alz j14 dmudets 9lujozdr /47a dm1-mu will

  If the south pole of one bar magnet is brought near the northf 2rfk /pb0+id pole of a second bar magnet, the 2f /db0+kpirf two magnets will

  If a bar magnet is divided into7()3e) j9h/xac/ p/ywqdxcubf 5 mwou two equal pieces,

  The Earth's geographic North Pole is magnetic3g b3hxtaj6n) or w5(jally a

  The south pole of a magnet poinrte)kv5cdc 4 )ts toward the Earth's

  An electric current pcfceuc +/-4c7txrts )roduces

  Which of the following is coc c y0k4sx1*inrrect?

  A vertical wire carries a current straight down. To the east of thisd,fv +5 ,ph-6zvypyyy wire, the magnep-y6fv5yhz pd+, yvy,tic field points

  A horizontal wire carries a 6r4 p3r kwo7wycurrent straight toward you. From your point of view, the magnetic field caused by this currk67wryp4orw 3ent

  A current carrying loop of bi:*7ilc ni9ah:i (ul wire lies flat on a table top. When viewed from above, tn*b7hi(:ic :aliiu9 l he 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 magnetic field

  A current carrying circu7262 hz9pclonsjqg1rlar loop of wire lies flat on a table top. When viewed from above, the curren6j gr9 2cszopn7qlh12 t 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 i ga jz0nrg k26hol.w 2o*g- m)gb8gp6us the

  1 T is equivalent to. hb aq gchwg8. sdl8.;+,wbcz

  The direction of the force on a current-carrying wire in a magnetic field ic r *ci5p2.fvv/wpn3 +bq(r3b5c owf ks described by which of the fo* bf + ip3bcrvrfc5cp3o(5k wv.n 2w/qllowing?

  The force on a current-carrying wire in a magnetic field is the strongest wha:ku:pmf+wbc.wqsd( i ai4( - en

  The force on a current-carryp v;awlp69-8rn0 d 2 z8vmnni 2jf3jesing wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region wfw6*s)ytuap1a49 doxs i0oe +y xk70ghere the magnetic field vector points due north. What is the direction of tha gfw 0aios4+e)ys p o70*dtk 1x6yux9e resulting force on this current?

  A charged particle moves and experi1buaws /noz7xjj4 c1ggb (a c)jzr73l7w.(zgences no magnetic force. From this we can conclude that7a(g4 orc7b3azj 1ng gwj /cxlb )zj.1zs(uw 7

  A charged particle movesx awer8teyf8 ;tnl.f3;k9o2 i with a constant speed through 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 part;2irw9a n3e koe8fft8. l;yt xicle moves

  A charged particle moves across a consc m;kpk3xb9u ls+ y1f7tant magnetic field. The magnetic force on thisxc;kslk3f upb+m17y9 particle

  A charged particle is injected into a unifori;mogk 3/r4e 64uss9sd se4bfm magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignorin4 egk3 f4es9sb4r/iussmd o;6g the particle's weight, the particle will

  A charged particle is observed travelingx;pyvf akkjl** -p84,xga4 z n in a circular path in a uniform magnetic field. If the particle had *jx4,-kv kflna*4 p gxpa; 8zybeen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circula4zyjei vb+t -x0*dkac( x(si5r path in a uniform magnetic field. If instead the particle carried a charge of +2e, the rad(dztx kvayj e5( b+i 4x*-s0icius of the circular path would have been

  At a particular instan2*kqdjxeyxsi) pp *80t, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts p)ds qji*x2*k0pyx 8eon it is

  An electron has an initial velocity to ka.q9ga v:qmg8s)v*f the south but is observed to curve upward as the result of a magnetic field. The direction of th*) 8mfaq :vsaqgv9kg .e magnetic field is

  An electron moving along the +x axis enters a region where there 4gc4d6j duex2is a uniform magnetic fixeg246 djcu4d eld 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-carryintvo4k : i c53u98nujdag wire is

  At double the distance f+ly,d*mg:j4 )r wef2 fjq(unm rom a long current-carrying wire, the strength of the magnetic field produced by that wire lfqfm y4)n rjgudm*j2 (+ :ew,decreases to

  Two long parallel wires placed side-by-side on a horizontal table cq5 6q7tb pm*klyo/0aqarry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carrlpbqqt y5am*0q 6o7/k ies 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 carry iden i lea8hzi,f37iqfb/6tical current straight toward you. From yourl a 6, i8bfi/ezfh7iq3 point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the foub/v5*3 ;mv mp2bucdvrce between the wires is F. The current in each wire is now doubled. What is the magnitude of v* umbv/ v2;bmu3p5cd the new force between the two wires?

  A long straight wire carries currzd2iu0bt 9u*sn,c 1voent toward the east. A proton moves toward the east alongside and just south of the wire. Wha bvis,nct 0uo *1z92dut is the direction of the force on the proton?

  A wire lying in the plane of the page jz ociqf8 nppe9 ;6ga8/ 7,rnccarries a current toward the bottom of the page. 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, frn,cra f7zg8/;9ej8 cniqop 6pom your right?

  Two long parallel wires are placed side-by-sihp7hh q+v1 es1de on a horizontal table. If the wires cas7v 1hqhhe1p+rry current in the same direction,

  Two long parallel wires are placed side-byec +/* x0- rm9zqr*bfr wkeld m:gbt:--side on a horizontal table. If the wires car*d*0e rx+ :rbb q9rw:g/fe zmm--ctklry current in opposite directions,

  Consider two current-carrying circu+d;5hhvge,4q q fn) mzlar loops. Both are made from one strand of wire and both carry the same cur;e, m)nhdqhf vz4+5gqrent, but one has twice 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 straa2e6iz7-91 7 d-fte1c-n0-i ixdr q hpzt rcimnd of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnexdd0eqh zct-ne21 -i- zii m7i-cfrat67 1pr9tic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying looor78r ;a nqc-sp occurs when the angle between the loop's magnetic moment and the magnetic fs8-o 7r;cqa rnield vector is

  When placed askew in a magnetic field, a current 66 yasuec0gpy,t*7nhf 09ouw carrying loop that is free to rotate in any direction will experience a torque until its mag0a e 6 u6y*ygnwt ps07uhofc,9netic moment vector

  What fundamental fact underlies the operation of esse)v4bji(j -dzy (t l0ddntially all electric motors?dd j4)((zitd jvl0-by

  A circular wire loop lies in a horizontal plane on a table and carries curr 6c(e1yhuugd f)u-uiae35r o s7s r0b*ent in a counterclockwise diresuig0 bh13sfe) u(uec y o76-a*drru5ction 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 torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and cha bdt5iax*2bvm. 1(k(nct :mzkrge 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 the velo(*n a1tizbd.:(mvkcmxt5k b 2 city of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consivd+os b e;e .:zke-e8usts of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocit8eus;zo ve-+k:b de.ey 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 currv oi :t0 im54 ,bv7zhnszbe0y60zq qw3ent of 0.60 A is oriented parallel to a uniform magnetic fib:zw7vb 430ti qm60zi5 0ysvho q,n ezeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction o r1m,o2: 8(9+gyux v pxinq33ekagdqj f $30^{\circ}$ 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 - f1nehig9hl- a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an 9 h-lfi-g 1nehangle 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 is in a magnetic fw(edc8e8*.chpvs f1u ield of 0.10 T. What minimum current in the rod is needed in order fo*s ewfe.81pv 8cdhu(cr the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unifory3l4qw+x mqj0qz n)g +m magnetic field of 0.20 T. What is the magnitude of the magnetij+n)qxl4 0qq3yw+m zg c 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 ae h2rx5p8eh w.nbrjx/bu47 6 f 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 spcv c* d51(+uhkfawpf5eed 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 wsw fcm9+om-zb*1v3hfk l ,c6 iith 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 speelhv2 v p9 (2ijs+zqg;4r,yaued 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 spee,s1cn (bwkolk8+ ip/qd 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 v019qhmrn:l qfuhe1(s( aov 4of $3.0 \times 10^6 \; m/s$ 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 lm1h n 61k(bj8e2jkggy09/ 1ccjd 0mnrx / jkzof the magnetic field at ajj0h/zb1dj1k m nkk2g y8cenx/g 6l jcr(19m0 distance of 0.15 m from the wire?

  A high power line carhrd8.b;rh5gxz(m+ wi rying 1000 A generates what magnetic field at the ground, 10 m ix(rzb5 gdhm;.+r h8waway?

  How much current must fl-r6w) 52essm+e lgxp gow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a low , (d7c(19t zrhkguksng straight wire 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 magnetic field of a7c, 9(1 w u(rzkhdkstgbout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions.z1xdc cu4w*,fvf:d (s 7e9q az v,sig/ They are separated by 40 cm. What if1z :4 cvd g9s7a,u, zixqdcvfwe(s/*s the 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 curreym 4gsoq9m5 gy (;6klznts of 20 A and 5.0 A in opposite directions. The wiql g9 5kz;4ymgosmy6(res 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 op.xft 2 hhhc zm u08 -g7(/qnztipp2mu6posite directions. The wirtuniz2(-u/ m0p86 .pfmhg hzhx2qct7 es are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction.th6 zdid;x ;mh a5le*0 They are parallel to the z-axis, and they pass through 6 ;m*ilxt;hh5a ddze0the 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 cnzbf pfy(j05 dv-pi.t zp/o(4arry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magneti- df4pzfz(0 (. jovip5 tb/npyc force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wir o f;rds9un.f,e of radius 4.0 cm when a current of 2.0 A flows in the wsu9.,dr; off nire?

  A solenoid 20 cm long is wound with 5000 turns of wiru;osh-r4fp5lbg wp )hr5z9 x3 e. What magnetic field is produced at the center of the solenoid when a curbf-lh5r5 pxpr 3whgs;9z) ou4rent of 10 A flows?

  A solenoid with 500 turns is 0.1cop0w h16c it .d 1,gkht-tl.byffpx,rn9)c , 0 m long and carries a current of 4.0 A. What streb,t0chcxkt- dnr.o c.), lfiy1 91 g,hfw6pp tngth of magnetic field will it have at its center?

  How much current must pass through a 400 turn orlaqz5e(4w5o,e q1i coil 4.0 cm long to generate a 1.0-T magnetic fie(15 qeza,roe o5q l4wild at the center?

  How many turns should a 10-cm long solenoid have if it is to generate (ur1kg*pb,pdfisy:9a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momu,5f( huen)tvnhq+ t*ent of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are,5n*tu tnufv (qh)eh+ 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a di;zc.8. o3axylww -x 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 th8x;3.oi.w wd zyc-alx e magnetic field?

  A circular loop of wire of crov ci-h(ts faac3n/38ess-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 a magnetic field of 3.5 Tcwfs c0hbioe- m :5l i.3-qoxlc92og- . The loop has an ar2: iwe 9f cclcqo5s-3i-.om x0golh-bea 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 unif1,r:ynk 4cj fnmfpa 1:orm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thenkarj cnp 1:ffy:1 ,4m plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magjtm:omj5gf+ w,w 5 *w)kh/ kjtnetic 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 parallel to the magnetic fie5/ g5 w w:o)+jjk,mj*thtfmkw ld?

  A circular wire loop oca2dmn6y n7.n f 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 part8hi ,ij /s l;og-ywby6icle (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 vahn*0 gi56wixurl8/ y elocity $6.9 \times 10^6 \; m/s$ 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 i9wu e ktca-aty7fgu 5n(/d-n+,zylh5 nto a magnetic field of 0.0405k (cule/yaf5-d nu n +haz,y tw-9tg7 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 5b(+ *thoi azr:00 V. It enters a magnetic field of 0.30i+z a*ro :h(bt T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 103*fu.eps p6f:mi l(wd k2q0a8 pntdn; kV before entering a velfw3fa.0 :ns kn pqut*lmd62pi e8d p;(ocity selector. If the B-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?