If the north poles of two bar magnets are brought close to each other, the magnbu49dq2y.at xets wdqy 2u4xb. ta9ill

  If the south pole of one bar magnet is brought near the north pole of a secondbn e0yv-/ 5up2wtx z*e2gkfr/ bar magnet, the two magnets2-egfwxz yu0nbvkp5 2/rt/* e will

  If a bar magnet is divided into two equal p :c. viepxgw4+1ylk4k ieces,

  The Earth's geographic North P)1 5(zbmxiuwa jx9c q7hg8 g4-bgh 4whole is magnetically a

  The south pole of a mao2h5qel f; l0hgnet points toward the Earth's

  An electric current prod dd7vswc,8j5qbx :an6zs ;x9nuces

  Which of the following4t 4*a wp2p tli,)ku iz5lz;yg is correct?

  A vertical wire carries a current straight down. To t. dy1v -knu+djhe east of this wire, the magnetic dj vd.y1n +uk-field points

  A horizontal wire carries a current straightq+d :bbmj+68mif f-k m toward you. From your point of view, the magnetic fie mf ++j imqb8-kdb6fm:ld caused by this current

  A current carrying loop of wire lies flat on a table top. Whd1em+zq,9gs jke f 1an-xx;e9en viewed from above, the current moves around the loop in a counterclockwise senz e1xn a qj ;k-x9+sfde,9mg1ese. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circul dyst:a)2 akv/ar loop of wire 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 t2/)d kt:s yvaahe magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is therlthg*:-yo+xnt3q h * 9fwr0k /: ycni

  1 T is equivalent to *koab.kc azpj*d.9;f

  The direction of the fonkqg v: ,uia;;rce on a current-carrying wire in a magnetic field is described by which of the folqka u i;n;g,:vlowing?

  The force on a curre v1agbj7nhrw m5r2vke*r r3- *nt-carrying wire in a magnetic field is the strongest when

  The force on a curren5: -bc1sbqfpz a5h3hqnm,wv3t-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetie97lfmz9dn:t5 +wc;swc tk5u c field vector points due north. Wha5dlz+mwsw9 7kc nf9 uc5 tet;:t is the direction of the resulting force on this current?

  A charged particle moves and experiencesj8 q ui0foe+m8 no magnetic force. From this we can conclude thqf+i 8eu8m0 joat

  A charged particle moves with a-2dpcp 0ub 6zttu;p 5r constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight urttp5zb06p cd 2-;u uppward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves acro8 b8ga3 a:vqyqss a constant magnetic field. The magnetic force onqba8q8y:v a3g this particle

  A charged particle is injected into a uniform magn. s:42pu4kip7ensifm wuz7cp rg;; :j(gy+ f petic field such that its velocity vector is perpendicular to thegu g2;(icisy;e w4fn7pz 7.j 4pfpuk:rspm: + magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observe bx 1kvyi);/f*uhunpqq dc 4l-90iq*qd traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circularxi1ilkd-* fupq*49cb )hqn;yqq/0vu path would be

  A particle carrying a charge of +e travels in a circular path in a uniform ma mc1 e4uul *z dajwwj+t-s;sna0,*mfv 2mk d,7gnetic field. If instead the particle carried a charge of +2e, the rad;+4ta lcwmsmsua1- 7, ,*ekdn m0v*ujd z fj2wius of the circular path would have been

  At a particular instant, an electron moves eastward aw,r e zf6zelgu99o(vmmjj7xm(+ o k: /+accl1 t speed V in a uniform magnetic field that is directed straight downward. The magnetic fo jrw/lz9mue flkg6 z:+,( me oc+jocv1x(a97mrce that acts on it is

  An electron has an initial velocity to n4/bqq* 49webtsf1yy the south but is observed to curve upward as the result of a magnetic field. The direction of the magnqwbe 4qfy 4stn *1y9/betic field is

  An electron moving along the +x axis enters a region where there isv(m cr c9jh3kq9a h;ynizk+4( a uniform magnetic field in 94 +mk9 r jkch((cz3inyvhaq; the +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 produced by a long straiu8y.cjagb v ,0ght current-carrying wire is

  At double the distance fromg3jed5 7evb ,c;qmf; h a long current-carrying wire, the strength of the magnetic field produced by that wire dec5qch e7dg3 ;j be;,fvmreases to

  Two long parallel wires plac -x7crwb; a1 :t5uyh, ae/np9g9pngjx ed side-by-side on a 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 you. From your point of view, the maxe9anyh gpurg5 x- tnj,p: 9a;7b1wc/gnetic field at the point exactly midway between the two wires

  Two long parallel wirfw + hgx2urf* 9ovf.tv63lsmo fa/ t*2es placed side-by-side on a horizontal table carry identical currento3o.2 69f aw fs/*u *gfmltvtvhxrf+2 straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betwp82w:ta6tmqw n )b o,mzwkf 94een btko8 :wmt6p 9zaw,q2nw) 4mfthe wires is F. The current in 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. ;xsuq yg7+s9r9kk/gwA proton moves toward the east alongside and just south of the wire. What is the direction of the force on ;sy/qs+99kg kxu7gwr the proton?

  A wire lying in the plane of the page xl5x8nri b2hofy7*q. )tv2hq carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly ttyvr.*272 bxq qnl5ih f x)8hooward the wire, also in the plane of the page, from your right?

  Two long parallel wires are platjw u1(3bti a0y 3,hoaced side-by-side on a horizontal table. If the wires carry current in the same di,b1a att y3ij3h0uow(rection,

  Two long parallel wires are placed side-by-side on a horizontal table. If the :jrsuyuad * o;6 pa*+i)iv.kgwires carry current in :pyo 6u+dk*ui iaj); a*grsv.opposite directions,

  Consider two current-carrying circular loops,+ma6jg w yh3m: v; f0hvgwj2d. 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 loop, the magnetic field af,;wy+2h:hwmgjdj 0v va m 6g3t the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand oae +ofit)hlu(:u 9w.g f 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 the larger lot ( +u wuh9.ag:folie)op is

  The maximum torque on a current carrying loop occurs whl5,jj4qsdwwme5q .fv *ad,4m en the angle between the loop's magnetic momed w.j,ml5e4vf,q*m4j5 s w aqdnt and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free tpm.e8sd fbbo1 ug+e b(:)( zoao rotate in any direction will experience a torque until its magnetic moment vebu.d8e)eb + fz a: ((gmob1spoctor

  What fundamental fact underlies the operat:6 1ortx ib8t *jpoud2ion of essentially all electric motors?2:iot8j*p obr61t dux

  A circular wire loop wr8 kob2 r9cmw6wt 9f)lies in 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 siw9 r o9wfkwcm62 8tbr)de 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 pa z(f ya y8da )ar)p+q47eu+iiorticle of 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 and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of th+ yod u4p7)z(aia8i+)qyar e fe particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through cross+ ikw b u80q 25xo*xt-gtzgf.ytur/9 qed electric and magnetic fielx8*grqyuf9gqu+5t-/.xo0i bk t t2wzds. 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 0.60 A is orienqgb z+6 4r c3.5csesczted parallel to a uniform magnetic fissebc6cz4 qc.zg5 +r3eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1l( 32twvagkw 3mn(m4quy-b;a 0 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 winh8y4 q- 91tjh+ly z;m5exq pere carrying 5.0 A when it is placed in a magnetic field of 0.020 T?q19zy mh 8- elqp5jeyt4hx+ n; 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 9ufdv3qu6ri ep1 pa pht8 (/7j*j*mzzof 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 magnetic force to cancel thrap/*e u9iz3j(qmtp*f1p8 z 7vd 6 juhe weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. + ueed*9s + tzor.iuq+ What is the magni*+9+ z. qisetuerd +outude 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 witrhhdh q of517qs z-f25h 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 speed +pxwi9s o(lh) k:0 yioof $5.0 \times 10^7 \; m/s$ 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 withw43sp6hudjp6y rt 4hpi+ zx(3y)1hvn 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 speed o-4 :t* *yceypq2xe bxzf $8.0 \times 10^6 \; m/s$ 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 3n6*1zvpiexvspeed 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:j2 f0w( 9h3vhxijluy of $3.0 \times 10^6 \; m/s$ 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 magnitude of3hkm/u0dvlm j m y;).z the magnetic field at a distance of 0.15 kmm) hd/mv.0;j u3lyzm from the wire?

  A high power line carrying 1000 A generates what magnetic field at the mtt45 mb;tjq( ground, 10 m away?bmqt ;4j5t( mt

  How much current must nk1j)ukvu5tt ( o4kg o 0ls+j,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 carrying29 bcutie71zp a current of 5.0 A is the magnitude of the magnetic petz12b c9iu7field 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 in opposite dzwm.z: n-a3/cchwm;2 bo 3ms yirections. They are sepa/cnmmzwc;am 2b:ow3y s- .3hzrated 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 the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite digkm5 k9 vn8m.q 3r0vmi uv34aqrections. The wires are separated by 0.20 m. What is the magnetic fie9 m3 m34vagq5v0k. 8rinvm qkuld midway between the two wires?

  Two long parallel wires carrni zvm9(s1a5 58sb xym nn*p+uy currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from bu18nvm p(+5 n5sx* i9mnzyas the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direct(nvn ic-,2eez t49lkdion. 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 ofd, lv e-9(n nkeic2zt4 the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 Ar9 c0lqs4vf tb pg,m+0 in the opposite direction. The wirel9t0 ,scf m4pvg+qr0 bs are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fieip (a9l moxmig74-gm6ld at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in thgig7 mi9(4 x-mpa om6le wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field i 5n(re uxbz-r0s produced at the center of the solenoid whenrx5u-nrze0 b ( a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carriekcz:j l-n(;x ws a current of 4.0 A. What strength of magnc z-;:xlwnk (jetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generatem30it1)x nw/kb p m7yksz 8sn. a 1.0-T magnetic field k3).tknzx1m0 ypim78wss n/ bat the center?

  How many turns should a 10-cm long solenoid have if it is to generate ;j a.ps, euin+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 turn + n hno*ej-kufym -58wqa+a7ss that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cm?8kq +nu- soa -hay7nj*w+ mf5e

  A circular loop of wire of radius 0.50 m isnbx 8+lm)npn +(v:rym in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thevy (npn8+n :l )xb+mmr plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectiona ng 6oagl(-fm*l 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.,8ner-. uvt7 ky mmm,z5 T. The loop has 78umr, -tyk .vne,zmm 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 a uniform magnetic field of 0.3gib-m5ar u 8fvi:2hkz l* l::mr kvb+80 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 lk+b8 f v l ra:vgk*z 2:i:5hbu8m-rimfield?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.3w .vqivm+:a am8l9kf,cw c5; g0 T. The current in the loop is 2.0 A. .kwq8c m9vmw ,c v;if 5:aalg+ What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop :y8ljb b-;p ypof 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 (chg ;qrmhpghy4kj7zfk*s7032 warge 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 velb2t z l t7j;8k.u4mbl 7*pda*orw: uwxocity $6.9 \times 10^6 \; m/s$ 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 potentialcdeqa+cc201rqw d s78m- s0i- d)wg oh of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting- 8dcq s0gsq7-drdw01o+a wic)mce 2h orbit?

  A proton is acceleratedj u ,lucc9lo4c;4n0d e from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular nej4;c0 u9ouc 4lc,d lto its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 q(p r(5ccoishdnv (.0kV before entering a velocity selectorcn. p ho0((5 isrcdv(q. 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?