If the north poles of trgar,s gjs lrpg .l)v7r y,t/0u87u8 lwo bar magnets are brought close to each other, the magnets wsu,lpavu,7 l .gr 8trr/l 0sg8 7gyrj)ill

  If the south pole of one bar magnet is brought near the north po1p8wh thxxy0 s3s h 3r7+id(hqle of a second bawpd7srhty1x x 30hqhi+8(3 sh r magnet, the two magnets will

  If a bar magnet is divided into tuovd wj0(/ 8qywo equal pieces,

  The Earth's geographicge,ki/hohxlx p 1f1; , North Pole is magnetically a

  The south pole of a magnet points tow2gu z6 ifc1rebv;/r(card the Earth's

  An electric current x/b ,aa:x2d(w a/sfy qproduces

  Which of the following iuqu 9ey3d/tep 1i,ty6s correct?

  A vertical wire carries a current sxhjm od8)e4: mh)u gf.6 )beuqtraight down. To the east of this wire, the magnetic field point)o) fj8.muux)b4hheq6e md:g s

  A horizontal wire carries a current straight toward you. From your point oe+k)9i jvcd 7ec,wg d5f view, the magnetic fielvcg9 j,i5+e7dcew)d kd caused by this current

  A current carrying loop of wire lies flat on m1u d3y azvn88a table top. When viewed from above, the curv81an83m zu ydrent 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 on a ta 77 nj* bwx5a -zhzg8.bp)iffsble top. When viewed from above, the current moves aronaibf - )js78.wz7 5bgf hzp*xund 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 is t/ ;m)dee *ze9bmk:hdihe

  1 T is equivalent to)e it) u2 g/c5xtp(lcy

  The direction of the force on a cu okob30 m5roj-rrent-carrying wire in a magnetic field is described by which of the following- okjrb0m3o 5o?

  The force on a current-carrying wire in a magnetic field is the strongest when9c4p tg 1w.vk4iwu d8g

  The force on a current-carrying wire in a magnetic field is e*0ngzj2-i i tpqual to zero when

  A vertical wire carries a cu.lx +nv0qhw 1wrrent straight up in a region where the magnetic field vector points due northqx+v. n0w l1hw. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we kni4epee,: f aj91 r*zcan co1r e4i z,:*k9pafej ennclude that

  A charged particle moves with a constant speed tie8 h005 nrumuhrough a region where a uniform magnetic field is present. If the magnetic field points straighr08ei nuhu5 m0t upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moveafuh v.ej konq4;er.q0kt 6 2/s across a constant magnetic field. The magnetic force on this particle0av h .k4u;jnq6tef qr/k2o.e

  A charged particle is inject;p2hfima7m6q bmvp :;ed into a uniform magnetic field such that its velocity vector is perpendicular to the magmmhpa2fmv 67;ib pq:;netic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed tra. ; jad 3cxqyd4t:vxz9veling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radiuy39zva:dd;cq xj tx. 4s of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnbqwn4 (pln5 a9y yha7(etic field. If instead the particle ca pq7a((n w95lyahb4 ynrried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward anwdd/386.mufm jeo )jk(kzv,pd 1 x*pt speed V in a uniform magnetic field that is directed straight downward. 1jd wdd )xefjkmn/umppkv(8,o6 3z*. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwardir0yp *: gc2eu as the result of a magnetic field. The direction of the magn* i0:cry p2eugetic field is

  An electron moving along the +x axis enters a region where therqyzec8 wt5* .pe is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the elee85q twc zp*.yctron? (+x to right, +y up, and +z out of the page.)

  The magnetic field pros1+gu;z zxb:,ov:t jhhjin 2(duced by a long straight current-carrying wire is

  At double the distance from a long current-ca3j)ygx)9em ha rrying wire, the strength of the magnetic field produced by m )3ayge9x)h jthat wire decreases to

  Two long parallel wires placed side-by-sidg/pr5 y k,jt*be on a horizontal table carry identical size currents in o ,kyj*/rb5 gptpposite 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-side on a horihf)n0,/ z cdauzontal table carry identical current straight toward you. az,hnd/ )f0cu From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires caqnw,xr+ 8j* hyrry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the thn*8w, yjr+ qxwo wires?

  A long straight wire carries current toward the east. A proton moves toward hm8 swmb 12 ea+wcq/-7/ l ivyu,nkus(the east alongside and just south of the wire. Whuchm2q-8w/ asu/n 1 sl7(,wk+emibv yat is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of thdv p7ph4cu; 7be page. What is the direc ;47phcdpu b7vtion 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?

  Two long parallel wires are placed side-by-sidet ,2nvwq-s7m o, cbsr9 on a horizontal table. If the wires carry current in tm,sbtow9 -q 27n rvsc,he same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If ;z/9 dw j(etmgt1u k:tthe w( j tkzumdw91e:ttg /;ires carry current in opposite directions,

  Consider two current-carrying circular loag5 fvjvgj9/yl rc +cf/, 6kp0ops. 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 lovggrcv f9 +,jk65l0fj/pyca/ op, the magnetic field at the center of the larger loop is

  Consider two current-carryin f3 dt.j1zf.a0b. mlfzg 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 momenzfz 1j.f .0 m.fbtdla3t of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle betweeni(atu+ co*n-qywu1i2dh +h q .65cpof the loop's magnetic moment an2 wnoi* huh dcpoaq(+6+qi5. yctu1 f-d the magnetic field vector is

  When placed askew in a magrtc:; )2soa wwnetic field, a current carrying loop that is free to rotate in any direction will experience 2; oaw wt):rsca torque until its magnetic moment vector

  What fundamental fact underlies 3esqj,jvv8l;)h0 r t qj --rbxthe operation of essentially all electric motors? qjrs0r- xjqv -8)v;bhtel3,j

  A circular wire loop lies iqkze(o:6wr k .n a horizontal plane 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 and dips below the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the wzqerk6(.ok: currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated through m9yrs2zqd)p pnu cw 92f+q2.za potential difference V and allowed to enter a magn fzz pqqn2ur)s2.9w dpy+ m92cetic 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 charged particle passing through crossed eiqedh4jzow8 7 nn13 1glectric and magnetic field 8honew1i7jgqd1 n43 zs. 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 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 0.6b8 eizww ef38hq+ 567 zxsin,x0 A is oriented parallel to a uniform magnetic field of wiqwsx8z57 ,eb 38h+nfzi6ex
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 101wez ha.y fu3 i/.p eejx wyz1(nji9); 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 per meter on a stro2 4mjjql 4d8waight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire ma l 824mdjqow4jkes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long hau;z7li,-s1hj.gq(g mk p q* pt*l tmv/s a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetz( ,-7hujgpmmv .*tti/q *l1;sg lpkqic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magn8 uoed/d /2kzfitude of the magnetic force on the protondde8 f//2 okuz?

  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 speed7 s3xxy* )xyd:vjv( lp 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 aro u8l77hq apnh7oh g6-::g8blq,jyspeed 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 speed aow0 pp; mt12un7uo ztub4k34$4.0 \times 10^5 \; m/s$ 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 speeddmhvbk-ib1j; 657 (gyk of,b*-gi pz n 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 speed5koo9cddzy35l5z yww8* 5iw8 ub-t dq;ebh0y 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 o b1pgb7nfu,ij u1 r-+ d:kc6hbf $3.0 \times 10^6 \; m/s$ 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. Wha /g ,;tcttzgm63bvj)mi/ ern9t is the magnitude of the magnetic field at z g 9v/t;mitc/n6,tr) gbe3m ja distance of 0.15 m from the wire?

  A high power line carrying 1000 A gene lc7q s*32damag nruo,6b403ih ( lqetrates what magnetic field at the ground, 10 m nl* se ch l2q(3 3ob,0murat4 dgqa76iaway?

  How much current must flow for -lzsc)sey-8n $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire cdj xha-6qhc) *.v2kn zarrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equq6hxn v)dk2a.j- c h*zal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10mvqoq42x s-;)x ;5piqlit 5f dov 4b0y A in opposite directions. They are separated by 40 cm. What is the magnetic fiel;bv4 sqi5t; f vx0)dop54-i x2lqymo qd 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 oppox(uzep m ;j//xj -mb0bsite directions. The wires are separated by 0.20 m. Wha0/ /xbxu; -mjjepzb m(t is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of k8rh ry mk a-c)07wkh9go/t a:w0pb*z20 A and 5.0 A in opposite directions. The wires are separated by 0.20 7h ):gok90-tr cwk hbapwkz0a 8* y/mrm. 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 w ,e w;sn:9pzvd ppl21direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the 9p s;:p2delpvww 1zn,wires experience due to the other wires?

  Two long parallel wires caru; s/zva*4 ljury currents of 5.0 A and 8.0 A in the opposite direction. The wires are sepu/ au*lsj4 vz;arated 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 circul37q m(,suojk2-bqsqc 8 wd quo /s8ed(ar loop of wire of radius 4.0 cm when a current of 2.0 qoq dq,smoc -(8378bj(usq k uw ds2/eA flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field isrqd c; npn6z;drwz rd1it7 p(be8-.1n produced at the center of the solenoid whd qr;nt idzrn8d; b1(6pc.nw17 pz-re en a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current o5 924c zfzargjf 4.0 A. What stzz cj f259r4garength of magnetic field will it have at its center?

  How much current must pass through a 49a3ei., 4zemcaoy1 hw00 turn coil 4.0 cm long to generate a 1.0-Tw ,aa1.iceey mozh39 4 magnetic field at the center?

  How many turns should a 10-cm long solenbr1r90kug,jz1jd8:oou l u m/ oid have if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic ;h d;m6zye)cd moment of a rectangular loop of 120 turns that carries 6.0 A if its cmh;;d6d )zeydimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radiu:8czit. adxe. s 0.50 m is in a uniform magnetic field of 0.30 T. The current in the idct.x8z:a .eloop 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 cross32par)v-hy s;a j/ qmk-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 T. nf2nz x2xrgl-4r v2hs, eum: 2 The loop h, rvhg42l zxsr2-nux:en22mfas an area 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 eq/7+4 d wpe8stjyi,nqk sm2, a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when tm,8 qtqdnwj4 2+is eekp /s,y7he plane of the loop is parallel to the magnetic field?

  A circular loop of wire of rad at0vp d2(q7:r 5 bqrack:2ijzius 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 magnetic fie2vr5zrka:a qi0q(bjtd pc2: 7ld?

  A circular wire loop ok kwby9o.b --wf 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 (charge e) has a sk;a c k.jrds;0peed 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 ionay). hlln zx2le3c d (l-a0ma1ag1m )y with 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 through a potentiay+al v v3biz-h4(4u ihl of 1.0 kV and then moves into a magnetic field of 0.040 T. What is3y(bv- il u +hhiav44z the radius of the proton's resulting orbit?

  A proton is accelerated frome anc8vff 1/(* *gykas rest through 500 V. It enters a magnetic field of 0.30 T oriente*caek /gfa( *fs1vy 8nd perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differencn(/fhgupc730. r+7n u:njfwaayr*b c e of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a y+w/ c0. p*na:jcbrnfnhf7(r3 ugau 7 value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?