If the north poles of two bar magnets arrds,ra r r4n8+e brought close to each other, the magnets wil,r sd+a4rrn8rl

  If the south pole of one bar magnet is brought rx;u /auo jg7;near the north pole of a second bar magnet, the 7uo ;a r;xgju/two magnets will

  If a bar magnet is divided into two equal piecxiozo(6 z:xq92zi9a2(o xk/*fnehwt es,

  The Earth's geographic2 8 hs/ hft.sw pvyk55l5qhgr- North Pole is magnetically a

  The south pole of a magnet points toward the Earth f:k;0d1 elep hh/7cji's

  An electric current produce-og-l/ l2drxb s

  Which of the following +om:rb9xr g d*9 m8glyis correct?

  A vertical wire carries a current straight qh zp cg6;pe9y-*mc 5kdown. To the east of this wire, the magnetic field pointm*-c p5c;qg 69 eyzkhps

  A horizontal wire carries a current straight toward you. From your point of +hyrva/)ivvb)k j 3+l2js4 meview, the magnetic field causedv bahmlv) i 3y ks+j/j+2)4evr by this current

  A current carrying loop of wire lies flat on a tablrw otn3 ,qg)/dh97n7joun, bve top. When viewed from above, the current moves around the loop in a counterclockwise sense. What /t 7urbho3gv,n9wdon7, j) qnis 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 on a tabllcdkox/9y 2a: 5hml iyw27+bce top. When viewed from above, the current moves around the loop in a counterclockwise sen+a c h2y:7xli2d5 /mklco9b wyse. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field isu4g5. x vndw.b/el 5bz the

  1 T is equivalent tonu12zn) o *br*z+3rnk v0tuli

  The direction of the force on a current-carrying wire in a2dhr 1h(*g + 9hqnstm+p wufk* magnetic field is described 1hfr(s h2nh* dk mg *qw+ut9p+by which of the following?

  The force on a current-carrying wire in a magnetic fnzqk (d tq7d -;b/ 4-bcsz6oltield is the strongest when

  The force on a current-ca cf9ca m41z:rurrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magn2,vxqqsi gn -1etic fiel1gq 2 sqv,-xnid vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. yrwr8cfp,8k /9 pjgt. From this we can conclude that , wgk9jrp/f8ycp.8rt

  A charged particle movesvw)ru,)r5hzub )l )sb 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 zbv)uh,))ls)ruwr b 5maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnet:wn0-moexf;z fl;9pxt 38d)v x ogd0iic force on wtfo8)v0ddx:zofi eg-n x3xml9p;0 ; this particle

  A charged particle is injected into a uniform magnetic field su 1wtdgk(w4sf68vi0ww4 six (- jjx iq0ch that its velocity vector is perpendicular to the magnetif ws08(xv(q0t s- i6w1ijwd4ijxgk4 wc field vector. Ignoring the particle's weight, the particle will

  A charged particle is observe n0(8bub;jx; dd ap;vep(1ftyd traveling in a circular path in a uniform magnetic p;(e n;fdvpa b (tdy0xub;8j1field. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cccr+ :id5a e av64fis0:cowc8ircular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have beencc :dsfr8+6o w5ac4ii:c e0va

  At a particular instant, an electron moves eastward at spen/8e fpo 5r 3im73zwym7c0iofed V in a uniform magnetic field that is directed straight downward. The magnetic forc8cfpn07 irm if3mowz 7oe3 /5ye that acts on it is

  An electron has an initial velocity to the south but is observed to c5g5o *:tsf* tux vvbk7urve upward as the result of a magnetic field. The direction of the magnetictstvv*u7: 5* xobkg f5 field is

  An electron moving alv0 oc4 nrf5;qyrb/q-oong the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force r5qyrf4/bv n q;c-0ooon the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curre31g 6p+, jxye2zz etbzz:e9 nqnt-carrying wire is

  At double the distance from a lon*gcwf 5 2pd, tuhkocv,p; 0af;g current-carrying wire, the strength of the magnetic field produced byfp;h v; pa* ck5f,d,wot2cug0 that wire decreases to

  Two long parallel wires placed s it7:lb j01r;cfzh,dk7.cws vide-by-side on a horizontal table carry identical size currents in opposi 7j:.,rvzl0bwk hd cscf;t7i1te 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 field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-si2b2/wz qa )yk+) s6hjdtlcu+ede on a horizontal table carry identical current straight toward you. From your point of c b6yzqd+hwt 2 2+lauke)s/j)view, the magnetic field at the point exactly between the two wires

  Two long parallel wires 5kajo(m5v( xyhj ow( pq )-dbc t,v,7gcarry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What i,5j -w g(,)mok qvypo(5jhbvadx7c(ts the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton mq99) fqws:only 4 xq2zoves toward the east alongside and just south of the wire. What is the direction of the force on o:zf 2 s9yqnw9l )q4xqthe proton?

  A wire lying in the plane of the page carries a current toward the bottom of the5upy;5cm x 8fok)gl9 n2o 2hmv page. What is the direction of the magnetic force it produces on an electron that is moving perpend5 2xm9p2m;c5kvhou8)l gfony icularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizo(26 3hfh7:l /2 5wpsbhtax cjylkuwf8 ntal table. If the wires c6:8h/wx u3lt2hkc 2 jfhpaf l5(sby 7warry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. Ifkzf es+5d *hj1 the wires carry currenek*j zs+5dh1f t in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strannl (bej 9kh4 t)p-v7kbd 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 k(hbn pb- )lke7j49t vsmaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrj-)71r p oh.xo plakk:ying circular loops. Both are made from one strand of wire and both carry the same currentk)ap -:71rhol.pxk oj, 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 *jtpv/4 bh 0dm n.tp7goccurs when the angle between the loop's magnetic moment and the m04jg.p7tmvh p/*t dnbagnetic field vector is

  When placed askew in a magnetic field, a current carrying pnf )jbks932e fd(2))s adcgkloop that is free to rotate in any direction will en9sd fk2ckbfj))(3s)a p g d2experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation odn,px5oj:;z nf essentially all electric motors?,p :z nnxojd5;

  A circular wire loop lies in a horizontal pl7pcq9 m-brz r:ane 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 anzp 7qrbmr-c 9:d 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 throughtji6*u1d i e*q a potential difference V and allowed to enter a magnetic field *dj*eitu q16iB, 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 charged particlek foj4by*r,1t passing through crossed electric and magnetic fields. The forces exerted by tk4y,jo1b* rft hese 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 v+ 97nm3zb-belk md8gks ); jdto a uniform magnetic field ofmj789zd+m; le3)gb dsn- k kvb
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of le 4 9wkxc ;ztf- (htdkc0)ujao ldn3-ug b48910 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 perej(m g1m7 exbe 0 yt*eo/4hnb4ge;5mp meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an aho/e(m5e;7bbm4t0jge1m ge*4 xe yn pngle 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 ioebk u, imw .2;sto6q7s in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weig2k7 o6iqb mwot; .sue,ht of the rod?

  A stationary proton is in a uniform magnead.uup (eo)t :tic field of 0.20 T. What is the magnitude of the magn(e. o :utdap)uetic 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 s sh. df7mhc f)g9pq8 :8ch;hlhpeed 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 o 8)8;i- 0f3tuljgx xesb /ghjif $5.0 \times 10^7 \; m/s$ 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 nor,ndbkjw)3g4 il-lcz 9 th 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 witht ko23qur/y/ w 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 speed of9u(, hark enb2 /l8kca $8.0 \times 10^6 \; m/s$ 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 of c9 k9+w)bz dcb$3.0 \times 10^6 \; m/s$ 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 curz(bbubb.f94dtakx7o cdaxf 5u 2 3e(4rent of 25 A. What is the magnitude of the magnetic field at a distance o2u7ed9 f4fx k4a3bz5buc .(d(bbtxoaf 0.15 m from the wire?

  A high power line carrying 1000 A generates wha1v+jgcgl :wm -t magnetic field at the ground, 1g -1j v+lw:cmg0 m away?

  How much current must flowy6)v6 iwq7hqm 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 straigh6xk ul/j h 6ia/b;(lxxkws4j3t wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength /l3 6hl4u/6a jsi( xkxw;kxjb of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires caqp,1o h9 j0/gs qb s/ixvx/f:lrry currents of 10 A in opposite directions. They are s/q0sqj: gxo9,f/1h iv p/bsl xeparated 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 other?

  Two long parallel wi q8/aoo0i)wv(l ,tjlures carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. W 08ua,ji ovloql tw/()hat is the magnetic field midway between the two wires?

  Two long parallel wires carry curveusb5:qak;2+g q/k8dy u5t vwy ,ww 5m2l7herents 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 contributid5hqgue2k/ uvy w+yqs8awv ;:kl m,5 7wteb 25ons from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are pa,e oec w;cnk8 i0fgz k77)0zyrrallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. ncwkyc0iz7 k)8ozfre e07,g; 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 opposite direg s+e:giwy:6 dxwe+dd(4* lbqction. The wires are separated by 0.30 m. Find the magnetic wg::ge(6sxi+ed+l4ddb w y* qforce per unit length between the two wires.

  What is the magnetic field at the centtt4;rc9 xjf u5u 9nu*oxj/ha9er of a circular loop of wire of radius 4.0 cm when a current of 2.0 A *9 9x5urnjhfx4tucuot /aj9; flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. vbr ,oq,cin4(4hx x0-x ca8d i What magnetic field is produced at the center of the solenoid when a current of 10 A fla dnhi4 8i,c0c4vxx ,-bq xr(oows?

  A solenoid with 500 turns is 0.10 m long and carries a curre7/ ok uf-gjh:csy,u q(nt of 4.0 A. What strength of magnetic -(hc ,qy7kg/ouu:sjf field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a 1.0mcth8 jem( vyq7kd9*+ vecm hy(q8m7 9 t*jk+d-T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to gene bqv+qa)9q vg3rate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment ofq qlek; v*/l;/nrqb6h a rectangular loop of 120 turns that carries 6.0 A if itqkb6l;/ ;ve l*qhr/q ns dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is u e3jtl1/+f*bwocojjw;gb: u7)q7 acin a uniform magnetic field of 0.30 T. The current in the loop is 2.tqwj*+fgoo: ;lb1b u7au7/ecjjwc )3 0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire o.z vst4/ f0:m*mnl1a pssz*fb f 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 a magnetic field of sx0 ulg dnw o*th1wxt .,0z;3v3.5 T. The loop has an hx3tw s. w;,*g 1 zlvxou0n0tdarea 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 un9sx9 k6ci wlel./ ew(uiform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the mag wl9wx/skil .ee6c (9unetic 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 fieldz,x(z p8m9yem w7qxb51pou 8f*.l ixu of 0.30 T. 7px.p 8 zz bmuxio1qex,lw9 58*mf(u yThe 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 j -rv3d,2vln npe,u j9area $0.25 \; m^{2}$ 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 sfr,dpf g2o r(9ingle-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 vemn4u:/ govmq /wrrv) -d pu+3elocity $6.9 \times 10^6 \; m/s$ 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 po y/j 8l unp -pmy56z2 ,pm,2e2pgftuvhtential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the r,6m/g pf t8 2u uznph2-,5vpyeyjml 2padius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V.g2i w ca6f8m6q0/nege It enters a magnetic field of 0.30f6ic amgg q6e2/n8we0 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a podd*4oo)ewj4 ktential difference of 10 kV before entering a velocity selector. If the B-field of the velocity seo ojed4k)4w*dlector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?