If the north poles of two bar magnets are brought close tobb8ptb+n 3 2(xwiy0pq each other, the magnets willq +p( yb8p0wbi3tbx n2

  If the south pole of one bar magnet is broughtt/ 0v o0 ta*uym-nbs5q near the north pole of a second bar magnet, the two magn5 oa-usm*0 t0b ny/qtvets will

  If a bar magnet is divided int yii6,aj k:g9qrz h vp+e *bv:lqcr1(x 9r(c4no two equal pieces,

  The Earth's geographic n+1a yhqqnc dv2yp7 r2jbu(1-eo a/q; North Pole is magnetically a

  The south pole of a mac7x of e1ak9 pz88m 9zk 8gb(e6yujzfq i*w3u4gnet points toward the Earth's

  An electric current prr,jy,i zo1*v;nz eo kntu*v0)oduces

  Which of the following is cc*zmz nh a 70- ,*xqb2pfsy0xlorrect?

  A vertical wire carries a current straight down. To t7 b *:pqhk9 o)xqc(n yro/ c3gls9x8wohe east of this wire, the magnetic fieldq 9kxwlcoo/ g* 3qoyb7p)xn8: csh9 r( points

  A horizontal wire carries a current straigh; c8iw3yl.jen t toward you. From your point of view, the magnetic field caused8 iny3lwc; .je by this current

  A current carrying loop of wire li* 9y b-du 9camw7u6pfkes flat on a table top. When viewed from above bmy-uk7wu*9 pa9d cf6, 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 wirpiqdr+;oemb )+ yc23z e lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, ino +3ez2b)iq+ ymr cd;pside the loop? The magnetic field

  The SI unit of magnetic field is they,*ejzm4a ( df2 osg e;ms56xo

  1 T is equivalent tohioy2xwcs7/ ;wv1: ;3ljck yz

  The direction of the force on a current-carrying wire in a magne,(d-fnz- k dwsi+d 1ontic field is described by which of the followik --w,ids1d (d nznof+ng?

  The force on a current-carrying wire in a magnetic field is tfz7np +2re+jq i;x1iyhe strongest when

  The force on a current-carrying wire in a magnetic field is equal to 3m -om.7nyaiiggr,blh c3j:ra+nb5 * zero when

  A vertical wire carries a current strai9 z/1c i ot;9wo;yvb3nlsmnm+ ght up in a region where the magnetic field vector points due north. What is the directzto;vn3w+9; mmboy9/ns lci 1 ion of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thisfrwx rlz )2jkv.nj9 1/ we can conclude )jrj9w nrf1./ l2kzxvthat

  A charged particle moves with a constant speed thd c;w+wcj;+ iprough a region where a uniform mcd ij;+cw+wp ;agnetic field 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 a558 c k6oaxrxmcross a constant magnetic field. The magnetic force on thisc 5xm raox8k56 particle

  A charged particle is inlqoce0vb560:6u bt po,t9l fyjected into a uniform magnetic field such that its velocity vector is perpendicular tooyq5cllbt9uv 0:f0,b6p oe 6t the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling0+tbgs-x i,m-7hkg q )ext 0ed -bdyf2 in a circular path in a uniform magnetic field. If the partif +qte hx-ddge)g -s0,-iykb mt0b72xcle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular7tc:ks; wprx(1bc i/ r path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wopsrkb7:crwt x ci/ 1;(uld have been

  At a particular instant, an electron moves eastward at speed V in a ucu7n/q3 j;rik (rbx +zjf,/klniform magnetic field that is directed straigh, zfqilj+ruj b3n cx ;kr7k(//t downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cur: cjf)c; hnls ,3amjtpc:4l.ave upward as the result of a magnetlhaaj.lsccp jt):,:n;f3m4 cic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regde*(2v,i)wtac o0b s njzyf7.ion where there is a uniform magnetic field in the (i 0* .ny v wfz,jao7bcse2)dt+y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produc *wk 9y7ip,6p1h6(phr dxjmgd ed by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire,1n1co/o qw;8c tl8it w the strength of the magnetic field produced by t1tqnt18iol w;ow/ c8chat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tal ma:2 gytcwj/u 009txs7f(muble carry identical size currentty 9m c xjf:(w0 lmgu02a7uts/s 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 exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal )523rb0rs-l p c4k r- tsskurptable carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the3bs)ru rssr c-tp-l24rkp k50 two wires

  Two long parallel wires carry equal currents. The ma e/xj7c p/aou fr21(kggnitude of the force between the wires is F. The current ip//o( 7jc ekf a1rgx2un each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towardi,: )9st2 okfrb)mfon the east alongside and just sou92f, m)otfnsrkb o):ith of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the p/k7zz vz.z,q7o; c rodage carries a current toward the bottom of the page. What is the direction of the magnetic force it prod;kz/zcz zr.o7d v,oq7 uces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires )l8h,v w7jqgaare placed side-by-side on a horizontal table. If the wirw,ghv 7j8 qal)es carry current in the same direction,

  Two long parallel wires a. ;z 3t)pg+jboq 0hpyare placed side-by-side on a horizontal table. If the wires carry current i0+;z.t y q3hpbjp)aogn opposite directions,

  Consider two current-carrying circular loopbtwec/;v d/rt6+2+agueq/ vd yed 1o/s. Both are made from one strand of wire and both carry the same current, but one has twice thec/+/rgv d tdyueaq 1+/tw6b2/odev ;e 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-caq(i(id 2 //xojh5 sgfkrrying circular loops. Both are made from one strand of wire and both carry the same current, but one has io/5/kj ( dgis fhxq(2twice 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 occurs when the angle bqxnvn.cv0q 2;etween the loop's magnetic moment and the magnetic field vector ;vq.0 n2n vqxcis

  When placed askew in a magnetic field, a current carrying loop th v3n; tyy*nwcy45u 98e3aplac.hvw.pat is free to rotate in any direction will h*nlwnt..pypvy9aecy u548 ;3wa vc 3experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of esse.5.hc.hyd1;8sm w-seaoour cg6+g wj ntially all electric motorsg cos -.5mguar.jwsh8 ed.y o;hw1c +6?

  A circular wire loop lies in a horizontal plane on a table and carries quw+sr 3p)e,hn k q0hryg9 6t;current in a counterclockwise direction when viewed from above. At thtwg+h 0,y) 39;qneshrru6k qpis 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 currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and ch bzz3h27-t gzpm:x1cwarge 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. Derim2p-7bwc1x: ghtzzz 3ve 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 elend2 vwlw/1u.a.c3 yrfctric 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 thw n /lu2.aw13fdr.cvye 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 s//egs /bsupx2 n/mu4to a uniform magnetic fieldpnms/g b2e/ussu x 4// of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dd,e0i t50pl2.0rrm kk uweay :irection 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 A7h2 jr:l3dyv l when it is placed in a magnetic field of 0.03r 7j:vyl2d lh20 T? The 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 an(h:m5:gms:h vr e8zjl d is 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 weight of jesz(:8 mh:5:vmhl g rthe rod?

  A stationary proton is in a uniform magnetic field -4 nha nyqcg*9u o- s9)wmlzv2of 0.20 T. What is the magnitude of the magnetic force on n -9 w4c9ugna)losqmv2zy h*-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 speehqq qtr71 28 of7 +tai xh7j24mhod+xo4zfg6yd 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 er oi9zx n4-p($5.0 \times 10^7 \; m/s$ 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 7e+uz0os bvdcn5u7lhld v9 81with 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 spe gw;hi(v h0(v(rn2 nqaed 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 ofj7-etig dtk r43q*ln9 $8.0 \times 10^6 \; m/s$ 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 7v zdhj q6b9 v3/vy6twof $3.0 \times 10^6 \; m/s$ 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 carriesoe jyg/u :z:e2 a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m f:g2oe ju/:zey rom the wire?

  A high power line carrying 1000 A ge 8 w5.iunj1mfkqp5+hj nerates what magnetic field at the ground, 10 m 5qun1h8.w5fpi +jkmj away?

  How much current must f54*r l;f6(svtzx+ uq16k)-b d cei tvdso4 bamlow 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 wire carry3r2w*4 vddnfo ing 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 magnetif dnd23r4wvo *c field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carrya)oax0 e2/llzy 3la ne;r/5 ja currents 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 c0 /e) z; lr 3a5ae2/anlyjxalom from one wire and 60 cm from the other?

  Two long parallel wires carry currents of e5e:du wbucsr,;+6zq s r5+ cl20 A and 5.0 A in opposite directions. The :rb 6we,sr++5 l cedz;s5ucquwires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 y7 zd tar. c2o2.*l-k6mnyuqkA and 5.0 A in opposite directions. Th2qtrkm-u6z2.o*n 7 da.y yk lce wires are separated by 0.20 m. 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 direction. They are pa-66(g2ohos.g /px y;mq w heaf5v/oilralle oq myfghvs6w o2-eog5 a.6/ih(px;l/ l 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 wires experience due to the other wires?

  Two long parallel wirwgbiq6 1mg ra/sb(5-vre73q,ve 1jg c es carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length b 15g eqe-as,j6/(3gqivc r7 bwrbg1vm etween the two wires.

  What is the magnetic field at the center of a circula g hi6 rph0rv8)ge2oqs)gt 0b(r loop of wire of radius 4.0 cm when a current of 2.0 A flows ) tqovhg g0gbr p0ir sh)e(268in the wire?

  A solenoid 20 cm lon n0 iyysd .no0)aw1 p2ip/hu2hg is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a curre1 so)p2a0n2nw iudy0 ih/.hy pnt of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cucgs3w ) nsk+(4p aqr:f0ob ev*rrent of 4.0 A. What strength of magnetic field willqbe csv 0 :a4(w)or*pkg+nf s3 it have at its center?

  How much current must pass through a 400 turn coid ln3a 0 qzjb(.f 7lpj3roq;;ml 4.0 cm long to generate a 1.0-T magnetic field d7.ojq pl;;rqmlba fn j33z0(at the center?

  How many turns should a 10-cm long solenoid have if it is p1 6eegej h07jto 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 oqhfu0hr2w mhn7x .w0): g;fnnf 120 turns that carries 6.0 A if its dimensions ar;nr)fhwhqmf.0u7h02 gnn wx:e 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is x qrmue09;h3tin a uniform magnetic field of 0.30 T. The ct90;u r xqe3hmurrent in 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/gemc6kb)q cc 5(wg 0 ce2 j/nthq6v2i 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 3.5 T.e16*hm kmco- q The loop has an arq6e*hmko c1-m ea 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 zqo2)c3jvkw mhw )fr/*-.c tzof radius 0.50 m is in a uniform magnetic field of 0.30 T. The currev)otcqhz/ f w) ckjr 2*-m.wz3nt 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 loop of wire of radius 0.50 m is i*mxxd48 x p(tiojy w5/n 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 fxd i4(yx p8 5wt*oj/xmield?

  A circular wire loop of 8y. wzc, si7hz( f.)cxvj;erxarea $0.25 \; m^{2}$ 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, ab ./ 81ubn .-g. qtbtv;nbkzsqy*hng-3ni pe8 single-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 k gufdc/el6 z(09qx4nwith 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 potential of 1.0 kV and* h tp myo.)c/ab awj,9y(j7kk then moves into a magnetic field of 0.040 T. What is the radius of the pr,p9kj oymy(kwj.b7/)hat *acoton's resulting orbit?

  A proton is accelerated from rest through 50*)oh*w it6vzd 0 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of to vt6*wihz )*dhe path it follows.

  A beam of electrons is accelerated through a potential difference of 10 ke-5o3i rsdl;xa-w 7otV 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 requir;oaodl37ir5 wt--esxed if the particles are to be undeflected?