If the north poles of two bar magneiar*h 0+iq ip)bl(zd 6ts are brought close to each other, the magnets wirz pa*( )hidqb6+l0i ill

  If the south pole of one bar magnet is brought near the north pole of a second c,4ia*gzaw6+ew ;jw-xcxy(p wz j + +abar a azwycx-+ a,*4 izjw(j++ wg6xc;wep magnet, the two magnets will

  If a bar magnet is divided into vu2vs d)4p+j:jftt( ap+6i5f ad tw ,mtwo equal pieces,

  The Earth's geographic North Pole is magneticalsx(hdta w 2r9m.mp9.qly a

  The south pole of a magnet points toward the Eartn v44rkyd8 9fhq snu*4h's

  An electric current produce ibiy,p 3 z+re0ahqww-zw- 4)*lulg2os

  Which of the following is correct?jvro d)ns : tww a-y3)9.l+cxm

  A vertical wire carries a current7m o(mbj l5c(f straight down. To the east of this wire, the magnmf bmc(75j lo(etic field points

  A horizontal wire carries a current straight toward you. From2zq; kast.m)e your point of view, the magnetic field caused by;)z ke.sm qa2t this current

  A current carrying loop of wire lies flat on a table top. When viewf--0gch:mj zhu 2b )soed from above, the current moves around the loop in a counterclock bcg)h-zhof 0s:-2jum wise 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 flak/,5hz*mmw q ut 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 t/ hzkw*,mu qm5his current, inside the loop? The magnetic field

  The SI unit of magnetic fielhhxu 1,z6.daql ll; -vd is the

  1 T is equivalent to4kd l*1mf3rfr

  The direction of the force on a-g hqp: 59umytd0g8 t5epzg;n current-carrying wire in a magnetic field is describedz8etpy qpt;-gg5hgnu590m :d by which of the following?

  The force on a current-carrying wirepiua-sa4lh;d myxif04: mn(/ in a magnetic field is the strongest when

  The force on a current-ca. 4ehfm9lk7syoj 5u-sc) : euorrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the ,59/n hikowflr +4 wt/c2 t1vs v,wtwpmagnetic field vector points due no4noil9/c, ,+v /2frw5p sk wtw tthvw1rth. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic fz; cdr; ;hqgm;p(oge- orce. From this we can co;-zrphego; ;d c(m; gqnclude that

  A charged particle moves with;,u rnio suct2n)a0. ttsl(1o 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 b1ool un tat.;2c ,r(itsus) n0e maximum when the particle moves

  A charged particle moves across* 0j 0e,*tho+q56: qapafaezvp pzg;s a constant magnetic field. The magnetic force on fas0aj,6 *z0v; h5p+ qtz*qap:eo gepthis particle

  A charged particle is injected into a uniform magnetic fieldcu5z qjtemj36.4 1vyw/py6r r such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particej p1r4r5 twzm c yqy3u.6v/j6le will

  A charged particle is observed traveling in a circular path in a uni u r:wi7gfiq,;ih:z:t g0xh h,form magnetic field. If the particle had bef tr,g h xiqwhh;ui,0:gi:: 7zen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a ua jx+z+r7tj ;w 8kc6fyo/ tiv0niform magnetic field. If instead the particle carried a charge7jwt;ja o/xk6 80+ctfiry v+ z of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V u347r zue+ x3xioc1ex/sjw - yin a uniform magnetic field that is directed straight downward. The magnetic force th r- xj4 71u3zeiscx /y+exwu3oat acts on it is

  An electron has an initial velocity to the south but i2cr1vuo:gskt ee83 ds jp vo4e7cs 99pt74e )as observed to curve upward as the9 c7gpe1e3to4)aes :98d2tek p 4 scroj7v svu result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regil),2 yx(*l:uzsz6qc lejz5ae on where there is a uniform magnetic field in the +y direction. What is the direction of the *(a:6 uez52,exllz cq jyslz)magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight currenq/6rm bhzk1 sqh(f ;)tt-carrying wire is

  At double the distance from a long current-carrying wire, the steic(y mfogn:lg s9jxto(d1-s /a57s :rength of the magnetic field produyn f 9sgmd1/7:jgtss- x(lo5a:(i ecoced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carno:sl+m3fbzo y14d2 v5a9kps ry 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 exactly midway between the two wiresn29oos +k 5d yfslm abp:z41v3

  Two long parallel wires placed side-by-side on a h5e c1 f34lo6wl udf8zxorizontal table carry identical current straight toward you. From yourflxou 6 ew5dfz lc8341 point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal qd/x c yynfq+y+-5s,ocurrents. The magnitude of the force between the wires is F. The current in each wire is now doublednxq/f-y5yyo c,+ d s+q. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proto q5 . xh*h 7sm(76waq9 h7xadowqpwu4sn moves toward the east alongside and just south of the wire. What is the direction of the force on the prox7 p6*u9wwa.7 w h75hqxq qsd4(mo sahton?

  A wire lying in the pjv)u)s o.ml/3j2i8hj seat 5-b zguk; lane of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electrov5 ijut/ .se)z2kag38u b;ols j)m-hjn 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 horizontal tab4a 1my5iyild)k l+u+ble. If the wires carry current in the same dir)lyyi5ba+ i +u k1m4dlection,

  Two long parallel wires are placed side-by-side on a hori*k*1r- ov evqks+9h3x lrs2eyzontal table. If the wires carry current in oppo2h+l3e y*x qvrekk* ss19-rovsite directions,

  Consider two current-carrying circular loops. Both are made from one st1uf8nqs v v86b;ix0earand of wire and both carry the same current, but one has twice the radius of the other. Compared taqsivnb 80;u 8ve61xfo 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 a (p,ue/hgm trr;/9tsuc/i6 nare made from one strand of wire and both carry the same current, but one has twice the radius of ther6ru us;i e//,( ngp/athtm9 c other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a currentkk1ala /bg3g1s-3 fch carrying loop occurs when the angle between the loop's magnetic momeb-k3g/h1 ckaf3 a1sglnt and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free to1uv*x9z e hzsg 5 r/2qgbp:m,j rotate in any direction will experience a torque until its magnetic momentq /xz 95mz2ju e*bsvg,prh1:g vector

  What fundamental fact underlies the operation ofbj/4yuuzn7o;wnhe4 5(cq yf;;5ozh v w(ba 0q essentially all electric motorshzz(c5b; vaqoywf/ q0 huw(o;y7 4u n5;jen4b ?

  A circular wire loop lies in a horizontal pla0f+6xka e5tv ibook+/ ne 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 currents interaction with ito+v b f e/0kaxo65+kthe magnetic field?

  In a mass spectrometer a particle of mass m agy80 xcg xx/vgf:w):w8hc d*mc (oet-nd 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 t (cm :e: yv0-8cx fxdcggw*/gho)w 8xthe 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 passinb l0kki3l gmsj;:49 mng through crossed electric 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 pank:3 is0 mkgm 49l;bljrticles 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 bhx t.y7b . rzsx*6/jx0.60 A is oriented parallel to a uniform magnetic f6 * hb/tbrzxjs 7..xxyield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currenkmkq+ki/vy )+av4,t w t of 10 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 straight- (db+seep3em wire carrying 5.0 A when it is placed in a magnetic e3+empd - s(befield of 0.020 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 and srk *q7nu6h kfc6g1 x ;)jubo9;9ozvk is in a magnetic field of 0.10 T. What minimum current in the rod is q6uro9 6 1xo7 n;)hz vkbk*sf;ckj9ug needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unifys- zx nn qp,w1*n9g5vorm magnetic field of 0.20 T. What is the magnitude of the mp9x,wn5*n v 1ng-sqzyagnetic 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 speed ot hhlt rt 95v:e/:wdbxhu071skj7a40 qz6jbof $5.0 \times 10^4 \; m/s$ 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 speed4 tt/l9r 1oxrm 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 )/, d4iypon( ederv;hwith 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 o, 4 wfs6ledz6a 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(-imvn - ; gnpezkd0;c 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 acceleration of the electron.

  A proton has a speed of lcwm.54s -pa d$3.0 \times 10^6 \; m/s$ 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 /aimaaj +;keqj 73 lglln;e-.a current of 25 A. What is the magnitude of the magn/ijln7 e3ag;;a+a elq jkl .-metic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field7x.2nr6nl nqck z9*rb bhz8 :h at the ground, 1z7*x kb 9z:8.q 2rclnn6bh rhn0 m away?

  How much current mustua )4pfvzyp(7jc8t6j flow 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 carrying a current of 5ur)j0n g q/o(n.0 A is the magnitude of thjunq0 gno/r() e magnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A ing x4tn)i72 :j4u lkhxi opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wl4ij i4 nxxu7g)2t :khires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wir4z z5g e* kesf42ctc3bes carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the zb 4t s*5c2gfc 4z3keetwo wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dirvzr6gm g j-2ick43 z6q;o *fhyections. The wires are separated by 0.20 m. At what point between h jr6 io* -fgkmgq6z c3vyz24;the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A obrtmf/nd4i f-ugcyp7-x: 10 j i: fs*in the same direction. 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 oum:nrpgt:y*df 4jfo-07-i c b/1f xsif 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 dirhw0)yfe,q y6 rnp -cvrn8 9ak;ection. The wires are separated by 0.30 m. Find the magnetic force per unit length between thew8qp ) 9y-yr6n;e rfc ,anvhk0 two wires.

  What is the magnetic field at the center of a circulard:v uqt*ttd y-v3y/7a yfm:bl .v e*.x loop of wire of radius 4.0 cm when am.f.7: *uyvavty bq*xyvte d:-t/3dl current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound )7pp nj ck2i7zi9ys j,with 5000 turns of wire. What magnetic field is produced at the center of the soleno7p zij2jpns)k9i7 ,c yid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curre3/ emporm:e x*nt of 4.0 A. What strength of magnetic field e:*3e mom/pxr will it have at its center?

  How much current must pass through a 400 turn coil m70*s epp2 c)fboo.ys4.0 cm long to generate a 1.0-T mag)*bo7 op2e0 ps fcsm.ynetic field at the center?

  How many turns should a 10-ci q.-xt q-jyqk:5*3cn u9jpblm 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 dw0:16huotuo turns that carries 6.0 A if its dimensions are 4.0w01ho6 o :uudt cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m ir ;u.pm9jo7 -aa4a vuis in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque m .uaa j7pr9u4oa;v-iwhen the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crx.;af vd y86u. zyab* /x8adkwoss-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 carrypu40. d-jsgdgp th*l4ing a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an ar t*p4udh -d jp.gl4gs0ea 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 uniforjhb,e;jt a) .vm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the e,h jt;b) vaj.magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wireu*scvo r;hmm.l m/8d 2 of 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 thesm m;dl/8cvmrh u. *o2 magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ar qoujn( 8n/+aiea $0.25 \; m^{2}$ 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 partictcxx msikyus (6)t83 ,le (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 velogsh jki.x4hc npm q4,3ttqu4 5)8 3utdcity $6.9 \times 10^6 \; m/s$ 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 thegy: ,we0 4r:+mtwnihmn moves into a magnetic field of 0.040nt e :mwhr0wmg,:i+4y T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters at.uiy6rfer k0pi w3z;ek(o .s5v2h/s magnetic field of 0.30 T oriented perpendicu6si e2o .pw/5 3k;rfreuzki.t(0vhys lar to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 k i ./ qnujtbh67lo4b 7k6dztr5V 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 requiredbo6zt jtnhb7 6qd57ur4 .k/li if the particles are to be undeflected?