If the north poles of two bar magnets are brought close to each otherhs0vg/ f*;g5y- q r+sbs+pgxqfsc; )l, the magnets wi sg *)l;ssc0gpqfq/ -ybxs+vg;5frh+ll

  If the south pole of one bar magnet is brought near the north pol3if2n1mch7ooi w0x 8d e of a second bar magnet, the two magnetc32oix78mndi w0fh 1os will

  If a bar magnet is divided into two equtd8idcosu4 ;x 6ejm l438(kawal pieces,

  The Earth's geographic North Pole is magneqoq3m xrtpm.aw6( jc:i66 -i ,n ojw54bge.netically a

  The south pole of a magnet points towardqt qm e .au..t1pkc9n2 the Earth's

  An electric current produceqm.4llor6 z 2ws

  Which of the following n3y6 b.c0hh 2x0uoul;/ m crsdis correct?

  A vertical wire carries a c +k1nrqg7w v:eurrent straight down. To the east of this wire, the magnetic7gnvreq1wk :+ field points

  A horizontal wire carries a current straight toway:hcm8 l4qgo/rd you. From your point of view, the magnetic field caused by th c8 ql/oghmy4:is current

  A current carrying loop of wire lies flat(7xxkva) xiwy 24, ac qp+..n-f3jaikc:n sum on a table top. When viewed from above, the current kaiay.nm wx,q2 -+cavi k3).xn:7xpjuc s4f(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 table top. When viewedd4a 5pe *s wz4i(9lfph from above, the current moves around the loop ia4 5d*h(9 4zwipflpsen 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 thej+*xpf . qsz)lk;,d0p:szu ph

  1 T is equivalent to.gd:xe 0d6e tm

  The direction of the force on a current-carrying wire in a magnetic field is deyjpfu a8 :nn//scribed by wuj8 y/n :nafp/hich of the following?

  The force on a current-carrying wire in a mar68ph 7 j jn9cgbmk8ynfpts+.(13a rt gnetic field is the strongest when

  The force on a current-carrying wire in a magiu q6y/*9ly+q 6asuvenetic field is equal to zero when

  A vertical wire carries a current straight up in ag hy9b:.ve6s j region where the magnetic field vector points due north. What is the direction of the rej6evy: gh 9sb.sulting force on this current?

  A charged particle moves and experie ovw88jdq3d 6mhu(l3r 6i.rkbnces no magnetic force. From this we can conclude thatluq3wh8 (866iv. rdko3dbjmr

  A charged particle moves with a constant speed thh0cozafyjq0gb .0c 3.rough a region where a uniform magnetic fiel fzac030.oy.jgq cbh 0d is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magneoa eaja 8y si,y2-fv( 5;j*yyptic field. The magnetic force on this particl(y;f oy2 v*8 a5iyypjj, -aasee

  A charged particle is injected into a uniform magneaa8 m xeli)fu(3 grir89y9ul 2tic field such that its velocity vector is perpendicular to the magnetic field ve8e 93fl2ya)umli9rag8 xri(u ctor. Ignoring the particle's weight, the particle will

  A charged particle isqh5cb)f/cpet x1ds sk.c 23e8zq v 9.u observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the racc8/.tzqsuq)ebkxpdh5 2se vf19 .3cdius of the circular path would be

  A particle carrying a charge of +eegf /; uofd6yd( nv,a: travels in a circular path in a uniform magnetic field. If instead o; dg6/ (de,fun :vafythe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular insta :o +9t l-9)q xktkmut5nxl6a v2dfq5ant, an electron moves eastward at speed V in a uniform magnetic field that is directed st5 q9at qk:)dxlt 2ka vxnf9m o-l65ut+raight downward. The magnetic force that acts on it is

  An electron has an initial velocityvtwkj p)3.h( t to the south but is observed to curve upward as the result of a magnetic( )w vhpkt.jt3 field. The direction of the magnetic field is

  An electron moving along the +x axis entersnmy, / i r+4bddrwhy6 rm/96nr a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the ele rmbd+ y6,96rhmi d/4n ry/wnrctron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight currenth. uxbz(:7jz+rm qax ;-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mj)cy ;5i.crr hagnetic field producedc;rh)cr. yji 5 by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table cw/q8pwc,n x7 garry 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 you. From your point of view, the magnetic field at the point nqw/wxgcp ,78 exactly midway between the two wires

  Two long parallel wirest ms21ob ea(xdei j qlzq243,4 placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, xl4jt(sbimd12az 2qeoe 3q4, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force beqvsnb0eskx .3;ase 8(tween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between aks 8 senqx;3se(.0vbthe two wires?

  A long straight wire carries current toward the er2 vk vsvx7)s:ast. A proton moves toward the east aloskv2sv7vxr): ngside and just south of the wire. What 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 uu0,s a q0mo8n2o8 wkwthe page. What is the direction of the magneticoq0 ,8w nko8su0u2wma 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-side on a hor0:pypim2az v bsi;zf ; 9a7x9bizontal table. If the wires carry curi xpvbza:9m zb;9;fisp0 a72 yrent in the same direction,

  Two long parallel wires areyr sa 5:sjeyj (d n fx)n8v5aw4m21hr+ placed side-by-side on a horizontal table. If the wires carry current in +(n1as5 xmhj sjrnr2aev 4fwy):5 y8dopposite directions,

  Consider two current-carrying circular loops. Both are madpn gj .1dw-j w01c6azje from one strand of wiregjpzj.w0dn61j cw 1 -a 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 loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one str-ooz/a7 k9 9mynbo*mog2 itl5and of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of theio7 km 9og-oyzm59nal* 2/o tb larger loop is

  The maximum torque on a current carrying loop o;if76f b)vaidx.y 6, t9efcooli8b v(ccurs when the angle between the loop's magnetic moment and the magnetif,6;f i 8x e9od b)vaioc6.fy7 tblv(ic field vector is

  When placed askew in a magnetic field, a current carrying loopou) +sx, 1:0eed fskdw 7mr,vd that is free to rotate in any direction will experms oddx,ek:f r7,0 u+se1w)v dience a torque until its magnetic moment vector

  What fundamental fact underlies the operat,gh1o: sut3lv +3b 3n2knx vkyion of essentially all electric motorsvkbu s2h 3l:v3+ x31yo knn,gt?

  A circular wire loop lies in a horizontal plane on a table and carries cu4, ackm f*s;i,t+9df njs )zaurrent 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 bec unmcdai*4+j ast ,,kfzs);9f ause of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle dk4b iy28uaq+.d(jnjof 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 . a2qu+8j d(ndb4ikj yand 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 eler, ;tvl ww3v1bctric and magnetic fields. 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, anb,v3;rwv wtl 1d the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of d6pv:pr;( qmebe o juo3sw1-:0.60 A is oriented parallel to a uniform magnetic field of:djrpbqve eu36s;-1oo (w:m p
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of 4a sxp6 viasuf 5b* y64in,ch1$30^{\circ}$ 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 carryj +fe11yzy:tqtm9(y ging 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an anglet 1 9t e(yjyyq+z:1gfm of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a m zo(s1uyf6(9oroyht2 ass of 0.050 kg and is in a magnetic field of 0.129t u(6soro oyyhf(1 z0 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is wfe5w-t7 m*y vin a uniform magnetic field of 0.20 T. What is the magniv m tf5e7wy*-wtude of 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 wigjrpnx h5ed d:8m- k8:th a 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 speejh/1l8 dl 0nind 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 withlg).rtgaor fce; + d5f id-/u2 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 speekvxu-o/p, bm0 eg hmes/h41 w-d 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 of j0, r9g(jhiwwkb/4q5wcw wg 7$8.0 \times 10^6 \; m/s$ 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 ofd,4ai, 3i,m/cmir 3yt g bfs1k $3.0 \times 10^6 \; m/s$ 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.9 qsae5 10y f2( ux99cjsiszua What is the magnitude of the magnetic field at a dist 99(ix0ysqza9s uc1sj e5fua 2ance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what mag+pyf h2 :v.gwqnetic field at the ground, 10 m q 2w+.gv hpy:faway?

  How much current must flow foetxt s4a6 1 cn;/ e,2tyg6mex tb(l/bir $1.0 \times 10^{-3} \; T$ 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 is the mar6b8bapzhfxczy: zprq73iz* k6 d6 90gnitude of the magnetic field due to the wire equal to the strength of the Earth's magne*7p qdi66x zcb 3aryzzk:8br0 phzf69tic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 77thu0u53hw 1r rxm n/zkzp-q 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 t57nu1tk3w0/qp7-hxrzrh z m uhe other?

  Two long parallel wires carry currents of wyxjbfj yw 1;dfg /8,/9 ic/vi n9drk220 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betwe1/x;n9id,2wc8fg9y/kyrwj / jf b vdien the two wires?

  Two long parallel wires carrzefjs i3hj;u+jb n(a *nm.z/(y currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what pi +abe(/njz zm j f;*3sjhu.(noint 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 direct 8pmwpltvp ; xs2j+v buu+/9z7ion. 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 tu;j wpv9 /ulvp++x7m 2zps b8one of the wires experience due to the other wires?

  Two long parallel wires carry currents ofw0 :gz 2ht1r4x 6 bj9rj4+mo.qzw uwbk 5.0 A and 8.0 A in the opposite direction. The wires are separated bbb:6wq1 2u+9r tz wz0 wxrj4gj.hom4ky 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fi3s+afega8) m/m nmx;x se-ar9eld at the center of a circular loop of wire of radius 4. se9x) rn;a+m /3-gma8sxfmea0 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magneti-.7gj52rry dp2luuue vix 16 jc field is produced at the center of uejr gp xjluy.2v i75r2d-16u the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cumx*ctvx( 1z q-rrent of 4.0 A. What strength of maxcmtz -* 1vq(xgnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to genera +l)icu)hv;r n o/gkx8te a 1.0-T kn)c8v ho i)ulr/x;+ gmagnetic field at the center?

  How many turns should a 10-cmd) iu+csl,l7s,ze4 yw long solenoid 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 moment of a rectangular loop of 120 turns that carr/j9 e)4cljpb1 jxfqw.ies 6.0 A if its dimensions are 4.0 cm x 8.0 cmbj e.41lqjxjf /w9cp )?

  A circular loop of wire ofhar ie-,ewj4bgqf5zg 7f-903g sniv9 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 perpendicular ti-9jarfehgv e4w f9,qi0bg -75 ng3zso the magnetic field?

  A circular loop of wire of cross-sec*s67g/g s wwhqb8w k:xtional 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,6tk1uwryz ,)b00z7bh gdj rp magnetic field of 3.5 T. The loop has anhwu ,6tpgrdr0bzb,yj k)7 z 01 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 a uniform magneticgq bhh/dvyh.7mq f8 0 e1.oc;d field of 0.30 T. The current in the loop is 2.0 A. What i81e bq0hdvo7. ;.qcf /gyhdhms 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 fiel92b15 dftago ud of 0.30 T. The current in th 5b21otfgau9 de 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 loopyk8xt *r8sz e k 95jqoz/h4g5t of 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 9ixdm s;p cvimi-5.6pe+a rg7particle (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 velr nvp 56jt7m(;9bn xabejxf91ocity $6.9 \times 10^6 \; m/s$ 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 througgga,bb vzp*z w38-k95tqbbb/h 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 rbz g8tz/ bb- 9gbq3p,k*a5wvbesulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiqb4w q46*m 3 jgm y.(wjmceg*veld of 0.30 T oriented perpen mmq3gjj .4w w4vbmye *g*c(q6dicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated througf2l,xxu/hl40t4v23 xsvg 3 nx rbto 38-gfsbth a potential difference of 10 kV before entering a velocity selt4gb 2/tu xxvg33 s 0t fxs-fo8rh24b3vxl,nlector. 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?