If the north poles of two bar magnets are brought close to each other, the ny jx14i )i uqv/k4nonbd.1f (magnets w.() ivx44nb/nj1d fynu1i oq kill

  If the south pole of one bar magnet is brought near the north pole ofo eg0iufh i 6vxau 5k+8t az2yd1xs1,2 a second bar magnet, the two magn x5h,yiux60 +zak g 1sio12d8 eafv2utets will

  If a bar magnet is divided into two equal piecesm8* 21aat r1nvyj r0eu,

  The Earth's geographic North Pole is magnet5-1y6f zow dkp8qd5*bdmw6j o ically a

  The south pole of a magnefgwunfna7 27 55fx t31mjpy;c f 79nklt points toward the Earth's

  An electric current produceiii 9;b zl+wa.s

  Which of the following is corr.;ty7blan)s iect?

  A vertical wire carries a cu 0t4brknn(3kl rrent straight down. To the east of this wire, the lk( t4nrbkn 30magnetic field points

  A horizontal wire carries a current straight toward you. From yojv0e9t b+k/he ur point of view, / k0ebj9h tev+the magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewedqgn ei ag1:q:5 from above, the current moves around the loop in a counterclogg51ae :nq: iqckwise 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 on a tffmjl(.t9 f4 *vcdho)fh 08dp able top. When viewed from above, the current moves around the loop in a counterclockwise sense. What ist mo fhf4lfh(*f80jvd)c d9 p. the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field yit8-+ 9um0 ;ik8rhro6mm1bcimy +bxa vm36vis the

  1 T is equivalent tow mzt,* .u)bxbfv z34j

  The direction of the force on a current-carrying wire in a magnextj533 80s tm i/c hguuv;0vqztic field is described by which of the zjct i qs3580t;m uvuxv/g30hfollowing?

  The force on a current-carrying wire in axqi22r9 ze,ebqeb-, y magnetic field is the strongest when

  The force on a current-carrying wire in xhdc2 (e/kjnw/fo3 : ua magnetic field is equal to zero when

  A vertical wire carries a current seye3v gnz.z (ck;auh4w. xc 8,traight up in a region where the magnetic field vector points due north. What ien4x.azc 3;c w( .hzukeg,8 vys the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thx4gg 3km3d4ypns jg(:yap0 2m,bmr+gis we can conclud:3,yx(pr bmp jmn2dgg3yms g 40gk+a4e that

  A charged particle moves with xkf2:vjlc6-i; hjirk:y:b e0a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on thi r lcj x-2:hj0:kkib;vf6:yeis particle will be maximum when the particle moves

  A charged particle moves across a o c1; s9jb4ypll69jzcconstant magnetic field. The magnetic force on this pz jj6y4;o c9lcp bs1l9article

  A charged particle is injected into a uniform magnetic fiel.nwdqke .a-in;q )cnv-xl1 bz* ,w6etd such that its velocity takn zq.,)v6d*lei1-;.wc nbne q x -wvector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a 9m8n 9c;t*-3rxq sxqa)bf)c n l8ybajcircular path in a uniform magnetic field. If the particle had been traveling twi) j;c9)txa3fqr8mas n-cb yb l8 *qnx9ce as fast, the radius of the circular path would be

  A particle carrying a chgj;1qeb c6s ,warge of +e travels in a circular path in a uniform magnetic field. If instead the particleq6sebjwg ,;c1 carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a *,e pnc; iz9q b3euz;kuniform magnetic field that ,b9u;qe;ikzp cze n3*is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the soa q ioo1en;sqx-g33;cuth but is observed to curve upward o;q - q3e;coan3 gsxi1as the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis entersa+fxyilex5 n r:q;f( *-)a6n vauez:f a region where there is 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 out of the p)a5nni-*a xel+ye : vqu afrz;xf 6:f(age.)

  The magnetic field producedvn 9 +mcf5ofqspf49)5f szsz. by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the s afp30 /+tirvstrength of the magnetic field produced by that wt+3v irfa0/p sire decreases to

  Two long parallel wires placed side-by-side on t1fzzx5+0x8.8tra i ve3.tdb m s2ouba horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from yes0b5i.tod1bxraz t 3v. m8ux8z+2 tfou. 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 horizon qs34iov ;pv8qtal table carry identical current straight toward you. From your point of view, the magnetic fi;4v pvq3 qso8ield at the point exactly between the two wires

  Two long parallel wires carry equal currents. Them+btgm+te5i bc*+hm .g ;am3t magnitude of the force between the wires is F. The current in each wire is now doubletb mmh .cbgg++tmt+i3a;* e5 md. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton mow+ g5-g/ko6hkx g 1jpnves toward the east alongside and just south of the wire. What ixk5o/ +gpng1 gk6 wh-js the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of theuh *qbs.)2zci xs)8in 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, from your right?.bzq ) s sx)ihci82nu*

  Two long parallel wires are placed side-bmf8c jbe*mzz :5mk)j1y-side on a horizontal table. If the wires carry current in thez1 mk*ef5 :mc)mzjjb8 same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If3a,e7gx 2s *flns7h th the wires carry current in opposite *hflns, h73ag27xet s directions,

  Consider two current-carrying circulawznm1m )43 uji4p 86d*ffhkp qfy*5 xsr 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 lo4*1hsxifw mq*8 fmu6p3jkdp 4f )zyn5op, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand of s ,i4p ,vlyone9x0y2 wst 7w7lwire and both carry the same current, but one has twice the radius of the other. Compared to the magnetiyon,wl7si y7 et,l04pv29swx c moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop ock;g:o :/ srahp5sibg 1r8uf k ed+q-9lcurs when the angle between the loop's magnetic moment and the magnetic fieiru: bhs8:e 1dkkqaf ospg;/lg r-95+ld vector is

  When placed askew in a magnetic field, a current carrying loop that wfe+*1j b9 siwis free to rotate in any direction will ewi *19+sfjbwe xperience a torque until its magnetic moment vector

  What fundamental fact underlies the ope( lsyk/ ;)+v/ .gckjnnz lkdi+ration of essentially all electric motors?gykk.+l(d/sv k;j + lcn/z)in

  A circular wire loop lies in a horizontal plane on a table and carries c1;cqaz, gmr g-urrent in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north1 a ,zg;mq-cgr 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 * (f3d c.bwixrm 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 the mass of the particle in terms of B, q, V, and *ixf.wr(cbd 3R.

  A velocity selector consists k(*i plxpe/p jd/r7 s0of a charged particle passing through crossed electric and magnetic fields. The forces exe s0j/exp*rk(id/p7plrted 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 paraln je53a.3t6t yu:hap.r gu:gl lel to a uniform magnetic fieldp.gru5. ahg:tj:3eul6yn3a t of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dire/ojxwz28dm a -s7xxar ,csbpa(4kml 77eb7*wction 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 is pla05j /zvhacgq 9ced in a magnetic field of 0.020 T? The 09/5cga vzjqh 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 field :v 8s;kdwgz f1of 0.10 T. What minimum current in the rod is needed in order for tfk zg8vs1; dw:he magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.2v syh+tpei;-*0 T. What is the magnitude oihe; -tv *y+spf the magnetic 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 rrgqpo*:v 5a 9up.e9flan:. ypeed 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 spfe5q basq1:6f-ke y1peed 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 with speef+zg+ v 2 a8vf0s f86b+vmyyled $4.0 \times 10^5 \; m/s$ 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 speo. c l(-+jbsjeed 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 speedd i605t.n ff zos0k3ek 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 2ip (nc*t / ytasl;x;kof $3.0 \times 10^6 \; m/s$ 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 magnitudh +7q.62jy qs8ndkzowe of the magnetic field at a distance of 0.1n2w+ 8 j.sk 7z6qohdyq5 m from the wire?

  A high power line carrying 1000 2 8;6i ilbxbbaz z4 qoc p(t,dqql5,oq/;qaf8A generates what magnetic field at the ground, 10 m away? z8; bqqa 4plboic5t( 2qi/zo ;6fa qxbd8,,lq

  How much current must flow1 t)le/a1svfqc uke8 1 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 straight wgfqsh4 z9ep3 :ire 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 abougf4ph9z 3e:qs t $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. Th3(o /pey, :1a*ysq:fqz jq.bru+hlw3fgry p-ey are separated by 40 cm. What i 3y le,ohaz sj:fqpq.3y*rw pfryqu/ :1b+(g-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 currents of 20 A and 5.0 A in oppo to,txkyw,/ 2q(ifeq7: a;1tdzre.7o fcqf 2zsite directions. The wires are separated by 0.20 m. What is the mag,ck,7rqf ed1 a xwqf2yi2(:./;tt fo tq7oez znetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directixfw ,k-ojs75xxvha 0;ons. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the twokoj, axxh 05 x7wsv;-f wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are pjogeqp v0mjh1sd v58 -a+e 9;larallel to the z-axis, and they pass through the corners of a square oe v dol+0veq8a 5jmh9-js;pg1f 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 cq18aye6klmi:s50:cbo t tt4w urrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic lt5e8akytsciqt :: 0 4o6wm1bforce per unit length between the two wires.

  What is the magnetic field at xpfbz rg+n0cf m-(n gy0*x: /zthe center of a circular loop of wire of radius 4.0 cm whr0z:fgx -n 0byp/+nfcxgm (*z en a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000bu+i t 2r 1ax3kfjx7sb3* 2pec turns of wire. What magnetic field is produced at the center of the solenoid when a currente3 kbaf +sijtrx21pub2c*x7 3 of 10 A flows?

  A solenoid with 500 turns is 0.10 m loh vmp96 nzx/ly(+l+x ing and carries a current of 4.0 A. What strength of magnetic field will it have at its centexl9 vz6i(+mhx/ ly+pnr?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a 1.0awwx8g -a( +l.) r ro5pjc/kqt-T magnetxa/lk wg rwo ( 8p).jaqc-+r5tic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate a y9(0ymzxdaen:mnlq)ry /o8 , $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular looplky9n*w iv7 *n of 120 turns that carries 6.0 A if its dimensions are *wn9ny l*k7 vi4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is *;/i ve*djomf. .gefn in a uniform magnetic field of 0.30 T. The current in ife.vn*je/ g;.dfo *m the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-y n4m- -is:.lye mvr2gsectional 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 fibhih+(* e+l0ay c2b tdeld of 3.5 T. The loop has an a+ e(tb ibhyld+ca*h2 0rea 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 radiu- q+u -vn wyu*3ssqhn15kc -tus 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Wha 3sunqs+u qw -h5-un tcvy1k*-t 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 oq -ska.3;y9yxu5qvgt(2zun n f 0.30 T. The current .vtgy s-5( nqn z9 uqy;auk3x2in 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 nbvkmg ra- g *:ogov mm2at*;d.3ca17of 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 particle (chargj d n/0;ll :tz(wk9rede 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 wit(slu ,ihsq n-iu*5+ :5kg hlbjh 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 throug+/zk+w0j5 2 suva ;hw:mpt1xks;uuk vh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting owxktk w 015u +u+ s:ukv ;;/vhasmj2pzrbit?

  A proton is accelerated from rest tqn.3 x7twi 9zthrough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the 73ti 9.twqzxnpath it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV ;;mvwu04c7btjju dy r6 j/k1z 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 re0t4m/ 1ujjkzwr y; 7vcdb ;u6jquired if the particles are to be undeflected?