If the north poles of two bar magnets are brought l1: r0f/h ahmsclose to each other, the magnets wi:hahs/f1m r0l ll

  If the south pole of one bar magnet is brought near the nor3 sz.erx2lpw7 1q (sdyth pole of a second bar magnet, the1 .wls 2zrp(yqd s37xe two magnets will

  If a bar magnet is divided into0ogc83i 5fsip p.t- :kglfc:o two equal pieces,

  The Earth's geographme 74swb* hwnp)mez 4cu v.6h3ic North Pole is magnetically a

  The south pole of a magnet poin zj .la cyf39ei+fgy+(ts toward the Earth's

  An electric current pro+uip.dc( 9hk dxpw g67duces

  Which of the following is ie.i5/k .0ht2k fbdjzcorrect?

  A vertical wire carries a current straight do);opc qwn2 fzj4i72yqu4 cah:wn. To the east of this wire, the magnetic field;72q4h)jwo ipnyc :uc f 4azq2 points

  A horizontal wire carries a current straight toward you.; rnxj),) ) d uaho+e-j/c5cufen) tda From your point of view, the magnetic u),)cdn td oh5)a+-jn jafex )e;/ rucfield caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed.zkhj +nhp484t(0p5r6 :kx wxascjh yq65djq from above6xhqjw0trhszd 5k n: 5ph4jc8 +ap.6jqx 4(yk, the 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 circular loop of wire lies flat er ;q i/4dss0fon a table top. When viewed from above, the current moves around the loop in a counq;ifs r/0e4sdterclockwise 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 g01txe2miw(lfi4y1gk3 hm f9s the

  1 T is equivalent top1s+x9gu k 9lv

  The direction of the force on gue ixm7o8 b:qs2,k. fa current-carrying wire in a magnetic field is described by which of the follow :o2k.u8ix7 sbm,gfqeing?

  The force on a current-carrying wire in a magnetic field is the strod7 .2lbd upz0pn sw1bz*kuhd my6// )xngest when

  The force on a current-carrying wire in a magnetic field is equ42 zs7dt zljk*+m)hiwal to zero when

  A vertical wire carries a current straight up in a regiu -(yaf6i;ea son where the magnetic field vector points due north.af u(;i6 e-asy What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this gav b78:lm4 qmwe can conclude tham g:a7 v4qm8blt

  A charged particle moves with a constanv-mj6;ss ytai-e 7/so t speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, tayo/i7sj-s ve t-m6;she magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magne2cuvtwz t59, atic field. The magnetic force on this partvut w,259ztca icle

  A charged particle is injected into a uniform magnetic field such that its8vq8 :n nyp)*lyafwv9 velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,8np)ynalq v9:*y 8fvw the particle will

  A charged particle is observed traveling in m wvx,i5.b s(oa circular path in a uniform magnetic field. If the particle had been traveling twice as fast, theowbmvx.i5, s( radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a utkfmonlcu sl)6(1 tey 5w6 j86niform magnetic fiey8 e wl6tnj)l5us co6mkf61t (ld. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron mo cfv g1qe148t:si6sf g e3.2xbnjclg0ves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it l: es8bff41vt.c gi6cq xes gj013 2ngis

  An electron has an initial velocity to the south but is observed t:,hj - ga6tz:f ;/rd0y kivaeko curve upward as the result of a magnetic field. The direction of the mje /:y ,t zikrv0fah;a6:-kdgagnetic field is

  An electron moving along the +x axis enters a region where there is,uxykm0n-q /y a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z ou0-xn / umqk,yyt of the page.)

  The magnetic field produced by a long slgug 3d;q (.fltraight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of th 0o7xdxhl8sxs7qt* 3oe magnetic field produced by thlqx*xs x707o3h s8otd at wire decreases to

  Two long parallel wied: 7edzg if3 tul)71nres placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left cadzdfi e: 3n7l1tg)u7erries 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 t0;kxdzmswyy 3e5up,d)ea/w qbi;, a( able carry identical current straight toward you. Frq5ai3pwd0bsm );k (e z y/wxed auy;,,om your 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 force betweeg y+n4.kd mp8fn the wires is F. The current in each wire is now doubled. What is the magnitude of the new force be8 nmfdy kgp4+.tween the two wires?

  A long straight wire carr r6in:fnu5c *v )ypx5fies current toward the east. A proton moves toward the east alongside and just south of thnxfcv iy)ur6:nf5*p5e wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current towaa8 - fksw8lfqo+s,/rcj9n z8 3,pfaxcrd the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly top 8c8ol-fr+a w j xsn/facz9k ,8qf,3sward the wire, also in the plane of the page, from your right?

  Two long parallel wires ar x5hys*wtqsig, syyr-(5gu 36 e placed side-by-side on a horizontal table. If the wires carry c yg5sgi5 3*6-r,t(qw susyxhyurrent in the same direction,

  Two long parallel wires are placed side-by-side on a horizontwd:0nnal6oi1e z+iys f 3p9; fal table. If the wires carry current in opposite directina d+9p 6ofz wsle1 y:03nfii;ons,

  Consider two current-carrying circular loops. Botr;-;p v+gqu hgqu*1y ch are made from one strand of wire and both carry the same currhcqpgr1 yu-q* +vg;u ;ent, 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-carryi.0)sf j mtq ii52 papvfa;:, ;7t iy6w+nzttmyng circular 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 n,6 i.v02f qz7y;tmtsaij+tt)y:ap;miw p 5f moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle y ahuto q t ch)5d9i5q wze8:-72ueqa.between the loop's magnettyedwazao8 q7 9 q5c.h2e: 5-htq)uiuic moment and the magnetic field vector is

  When placed askew in a5x+9 riwys:p t magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vt w9x+5iyps r:ector

  What fundamental fact underlies the ope3cc3 r)wf lo/mration of essentially all electric motors3f)w/ clo3rcm?

  A circular wire loop li4 wbmhn zz2r)y/g9ife2yf k1.es in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, 14ikffbym .hz/ner g9yw2)2z 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 spectrometo7rly /w;0om.t adxh 7er a particle 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 the velocity of the particle. Derive an expression for t;7 xo r7dmyt./ah0lwohe mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crosszt:wj:/hjqq(b hry uwi c d4;9*6 rs;xed electric and magnetic fields. The forces exertedrucd9w trjz/b ;:wy6;s(: iqh q*hj4x by these 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 ahf sy)c0 fs*j,oj;5g v uniform magnetic fie5 cjgyhs, o;j*fv 0f)sld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction gczg p/ h3a9 pt gesq0()nx63hof $30^{\circ}$ 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 lhu11wk- ;lbua straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? Theu1 1l;h ubklw- 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 is in a magnetic fl3heb v- n5hq+ield of 0.10 T. What minimum current in e 3 h-5+qhnvblthe rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform m8p-t4pks9e +-i tswnnagnetic field of 0.20 T. What is the magnitude of the magnt-pns8sw t k+- iep49netic 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/pcrw1x/ ip2. x nn0mt 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 speed of u +u4er m..jvoh9uy 2qyr5qp 2wptt-1$5.0 \times 10^7 \; m/s$ 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 *(1ai zf86ksmh p0m gawith 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 speem dh9 4z8iz;jtd 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 with9qqop1qxp+1 p/w tu quaxf 5i-j/(ic1 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 o88hl yebu:sg)3b8 r6woh(j baf $3.0 \times 10^6 \; m/s$ 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. /ootvx8*xh4o d0 roun5s *yb+What is the magnitude of the magnetic field at a distance of 0.15 m from h4brsov5oxox8ou*0t d+/ *ynthe wire?

  A high power line carrying 1000 A generates what m;z::0le lgioa agnetic field at the ground, 10 o;e:zla0i: lgm away?

  How much current must flow for ypr7 nn low*do)07(ow$1.0 \times 10^{-3} \; T$ 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 i2j 6+oc pcyawn)k/8yhs the magnitude of the magnetic field due to the wire equal to the strength of twk oyn2c)8+j pac/6hy he Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curre0s**8uu ueqr s7(i tftnih7q i(iq-u,nts 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 is 20 cm from one wire and 60 cm from the qq uth(s*f,ii euq7 0(it si*8nru-7uother?

  Two long parallel wires carry currents of yad rbn2dap9o( ,k-p9 20 A and 5.0 A in opposite directions. The wires aro(k29,add -a9pby nrp e separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carrrx vcqca+r-7 4a1y qalg /dh7:y currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between taa4dcga77+q1hr l: xq/vrc-yhe two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 As:t*tr;fj utk :e,.af in the same direction. They are parallel to the z-axis, and they pass through the corners of a square o* f;tk t:s,afje:r. tuf 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 and 8.0 A in the opposit pvz9tlf)fgh+0)k j9lbkv2ky 6gpt-;ff9pa0e direction. The wires are sepvt99 f-g9ykblj0k;f kz0gf+ )ptlph)2a f6 p varated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of kase-6m-y -m3s8oc cawire of radius 4.0 cm when a current of 2.0 A flows in the ws 3c-ya-6 o-kmace8ms ire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What y ( .k2e.cx ffpgff:1 wza,;pumagnetic field is produced at th:xgp.e 2;1c wzufy p.a,kfff(e center 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 4.0inynw0jvy);* cvhp ;0 A. What strength of magnetic field will it have at i h*nniw0c)py;vyv j 0;ts center?

  How much current must pass through a 400 turn coil 45trt q- vnk3ln7dl e;xf4oex4/:um j 5.0 cm long to generate a 1.0-T magnetic field at the centen -/f4 nxtvjom:lux k75q3l 5r;etde4r?

  How many turns should a 10-cm long solenoid have if it is to generate a ;zvjln6fy.n-qvx,kr22rte 4 $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangularmh wl-,zy16b w0 bgkn4 loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cmygwklzb-m 6n4wb 01 ,h x 8.0 cm?

  A circular loop of wire of radius 0.50 m is ine2 8y0r.vv(hsdbye e2g a.zc; 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 the me;hv ec0day22 y.r(g z vsbe.8agnetic field?

  A circular loop of wire of cross-section buze5s 78j6gfq,1wet al 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 cur3hb vi evr;f f,)f/t,lrent of 2.0 A is in a magnetic field of 3.5 T. The loop has an )ffve;vf,rhil/,t3barea 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 fy: d,gj5xx t i81dsw,of radius 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 parallel to the magn yg:5fsx18i dd ,x,tjwetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field 4.4,g kgnd1d nvsr ww+of 0.30 T. The vn+k4dd1. 4 ggs,r nwwcurrent 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 ob ubrdswb 0i+6w: u0f5f 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-chaz3 .nt35 ggxo:qyt y y866fafirged 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 veloc;x q+5syhmx( dity $6.9 \times 10^6 \; m/s$ 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 6hqs,y :a23t dbfhvh)into a magnetic field of 0.040 T. What is the 2) hyvh tfa:sd3b,h 6qradius of the proton's resulting orbit?

  A proton is accelerated frc9udgi. )qwe 4om rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it followwcd 49)gu qie.s.

  A beam of electrons ii)vfsy 51ad wlbqo+3 hyo2*+ js 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 required iffyb* l+y doowqs15 )hvi+2j3 a the particles are to be undeflected?