If the north poles of two bar magnets a+9h-17xvpq43(e1nfz 0 b ec4sgqpwqp /kkgx vre brought close to each other, the magnetsezs kwp 4fqevh4+0 q q-pvgcn3b /7kpgx( x191 will

  If the south pole of one bar magnet is brought near the nortzmz:s h37bk /ch pole of a second bar magnet, the two magns/z hk :c37mbzets will

  If a bar magnet is divided into x vddyas4 f5nk+wme ,97)j;sabtb1g/wh i8(ytwo equal pieces,

  The Earth's geographic North Pole is magneticallyb .4e1 p6j :w g i4,oz7vdkqvt2pvlpe+ a

  The south pole of a magnet pointdo:2e ,3 0(+tigpb3ong 4 scrmx :rpews toward the Earth's

  An electric current produc/g 1mbf0ex f p90d5lhees

  Which of the following is correc 3w2e-, h;x en.iecqaht?

  A vertical wire carries a current straight down. To t3qep ;(-t nsiwhe east of this wire, the magnetic field poin pn;e3w(-qti sts

  A horizontal wire carries a cur3t pf7s.rf)y: mpqiz9rent straight toward you. From your point of view, the magnetic field caused by this currez7fq).:f3ym it srpp9nt

  A current carrying loop of wire lies7g .ojb+wbf- /*bjavg flat on a table top. When viewed from above, the current moves aroug b.v-fja* gbb /jwo+7nd 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 azhwkiol v e ,p9(hb95wo(jklb,x 21e; table top. When viewed from above, the current moves aroo,bjww 15;kb9e,lip ol(2ehhv x( 9 zkund 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 magneticyvn;)m0kd.of-ken-8ymg6g z field is the

  1 T is equivalent tok c-s( fk3p;zj

  The direction of the force on a current-carrying wire in a magnetic fiepe53 m8d w:/hkd ix* opjp/k0rld is described by which of txke:mr03opi wj 8/d * 5dh/pkphe following?

  The force on a current-carrying wire in a magnetic field is the strongest wheoftkscead77kreo9gxr qsp +,g*zuv-0* 0+/hn

  The force on a current-carrying wire in a magnetic fiel k 1ylyih qo;p4gsisjm92k :*9d is equal to zero when

  A vertical wire carries a current straight up in a region wherrjhi 3t-+oljj/ 8sgtj3 dh+o4e the magnetic field vector points due north. What is the direction of the resulting fsjitt3oj8rj ld+4 +3oj/ hgh -orce on this current?

  A charged particle moves and experw9xd j-n f5bw/9qq7qr 9sg6kmiences no magnetic force. From this we can conclude t9q9q5wqxsbf k9nw - g jm/d76rhat

  A charged particle moves with a constant speed through a region where a unif1eunz mf):p1h .pa 4offx3ma6 orm magnetic field is presentnfe xa:hm4p 1f)p6. omfu3z1a . 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 +zhw/4.70fxrdg wjtc magnetic field. The magnetic force on this pz w/c7xr+.0gt dfhw4jarticle

  A charged particle is injected into a uni25uiooz8 ck fe)7,a maform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring mea7,5u2 ) c8i ookzafthe particle's weight, the particle will

  A charged particle is observed traveling in a circula7qfpnf5 46(b +ayr/i5ttq jt jr path in a uniform magnetic field. If tfpnj(4 7ay fri5qtq/bj +tt56he particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e trave(tos ux8x7 s5pcjjqu6yj,-9 q ls in a circular path in a uniform magnetic field. If instead the particle carried xs x,7jqy-o8tq 5p6u jsu(c9j a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at spe(2gd 4v(r.c-itj ct6e2ec ae k :qik7ced V in a uniform magnetic field that is directed straight downward. The magnetic force that ac7 e6t t( 2c: ekgq4(c-cicej.di2 rvkats on it is

  An electron has an initial velocity tsf8pj6m 01w3llb)6euiou5 sv o the south but is observed to curve upward as the result of a magnetic field. The d60um631 )ovjsps8 ebw f5i ullirection of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform mau 5gdki8;8hzz wpqk w(3a9 r5agnetic field in the +y direction. What is the direction of the magnetic force on wqau (wpz rkai83z8;hk 9 5g5dthe electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field p4 f0+3scpucj rroduced by a long straight current-carrying wire is

  At double the distance from a long current-cafz+o .c 1u*wdm)h zz0srrying wire, the strength of the magnetic field produced by t. 1 * dzsfz)mco0hu+wzhat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table car0xwcm8 * )kqovte (q(ory 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. kv(e 8q*xq)wo0tmo c ( From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed sidey gx3byy-z k5+0dx ey.-by-side on a horizontal table carry identical current straight toward -exzgdyb+ky0x.yy53you. 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,zaem2qj1ao r 3i;f a( force between the wires is F. The current in each wire is now doubled. What is the magnitude mz o,3;ar 1ae2 f(iqjaof the new force between the two wires?

  A long straight wire carries current toje)t1 bxo n,bfp)mj3/ ;0xeqcward the east. A proton moves toward the east alongside and just south of the wire. What is the directionm1j0cjepx;3qxbtfe)b ,/ )n o of the force on the proton?

  A wire lying in the plane of the page carries a current to+4v)yats:dl2xe n; 7 xoxh i*su4gue 3ward the bottom of the page. What i ) y* 7oune;hd43s:2elt+g4 iauxvxs xs the direction 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-side on a horizontanafy7r75ye o 9n76 jqnl table. If the wires carry current in th 7qfany56o 7j7nry9 ene same direction,

  Two long parallel wires are placed side-bn4wpgc)n xht;4 je6y7y-side on a horizontal table. If the wires carry7ye ghtp ;n4)6xc n4wj current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strs w;o,m wu0a*b81g tdtand of wire and both carry the same current, but one has twice the radiw*g0ws8u dtmb; to1 ,aus 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 a7y(af kt1j6ysre made from one strand of wirefs1(kya jty 76 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 loop is

  The maximum torque on a current carryi uolmrz kbq(+,0; *ekeng loop occurs when the angle between the loop's magnetic moment and the magnetic field v oum;r+bk q0ekz,*e(l ector is

  When placed askew in a magnejee3. +12xzd cyb,oa1 dc1dmntic field, a current carrying loop that is free to rotate in 2 1xe , a3emb.oy+nzdd11ccjdany direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motortt-,i 5scn(qw g*xt,z s,z( -5,ntw gtc*xqtis ?

  A circular wire loop lies in a horizontal p n9zk. dbwc z6a:lstbk8rlp pr(.98m( lane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic zpt9r 8lw b (lzp (k:cka.9rm.s8b6 ndfield 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 charge ensn 0e7och+:uf) +j /0nglpza 2xl3nq is accelerated through a poaeegslp)l u zn+c/xnoh n20:+37 n fj0tential 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 the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing throug.py5-q da; s9ipfjvyl7,.ppsn,,kifh crossed electric annf p7pyi,fyp,;d9v . i5q,apks.s j-ld 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, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a curre:8ob s -2c(6wwxf avlubww9f)nt of 0.60 A is oriented parallel to a uniform magnetic field of 2fba:6wsvw wlfcb8 (9o-w )ux
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A uu ugm7ys,vk :c0iug 5xy(e32in 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 ondcc 4t,6lal 33 flk7s ayg,3so a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle ofgla3k,a,dlss43tc cly 6fo 37 $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long hh:c9c-yi )fteas a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is nee9fie )ccth -y:ded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0vrw/ n)q; u9tw.20 T. What is the magnitude of the magnetic for/wvn);qt 9wu rce 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 s jcmjb8g 6d:7b -yo3typeed 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 of7dxuw9rj.4a f $5.0 \times 10^7 \; m/s$ 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 +5mi ab,cbbicx1)u,f i;je i- with 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 spzyk,hcsy aitx+5v6 i 37c5 a8qeed 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 s4pmd4w7z1g rppeed 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:aq nixn c6 n:aw+gc9* 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 carryna3 mrnl6hmi ;dw/1s+l 6*yries a current of 25 A. What is the magnitude of the m ims1+ay ydn;66rlmrl*h /n 3wagnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generp,p8ql5 y kq4fates what magnetic field at the ground, 10 m away5,4pqk qf8p ly?

  How much current must fku(q01 t ailu0r /,,b* htvwfelow 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 currentn 2:1 1coq0md( qp61dhaszj tl of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of tpqjno1qc t1z1ld hm 0s:6(a2 dhe Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carzhxn :)oh/*+d omcw:bry currents of 10 A in opposite directions. They are separa*x o:cbm)oz:w h/d hn+ted 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 car65jy; 3t ekac4zwd vi7ry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway6v; zcd w45it3jy7 aek between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direct7zgo /7n1kkq qi m)43pi3 edc8 z*wlwtf(+ rttions. The wires are separated by 0.20 m. At what point between the two wires are the contributic3df+q 8n/e4t( ipigoq 73tmz*ltkk )71zwr wons from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directyoz(c4ao9qm0 i7udb6 ion. 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 wires experience due tiyum( 60ooc4 79qazb do the other wires?

  Two long parallel wires carry currec 55h(iojnyp 3k:g )aants of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Findhjaayk5pg 3n o(: )c5i the magnetic force per unit length between the two wires.

  What is the magnetic field at the c/xr 47wgt ++jbsog pt4enter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in sg+7t4 / 4ogtrjpb+ xwthe wire?

  A solenoid 20 cm long isp**pg m+ m:ybc wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of+py:g b* pm*mc 10 A flows?

  A solenoid with 500 turns is 0.10 m long .t xe uyc 1)m+/gq gajmv+ dt(,vu8p9ymdy2.xand carries a current of 4.0 A. What strength of magnetic field will it have at its centq28y/+dgmd xyj+ta. xt)ypc1e( ,9u v .mumvger?

  How much current must pass through a 40(wrioq2 )(n kp0 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the centeri ()nqkwop2r( ?

  How many turns should a 1x, 9lrk9j 8zia0-cm 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 smk;z1zf-rd( lj 2bc1turns that carries 6.0 A if its dimension2czbz rfm l; (-s1d1kjs are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 .vyrs on3;1aa vr p65rT. The current in the loop is 2.0 A. What is the magnetic torquap y 1 ;5anrrv.o6sv3re when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional are7 n/u.zvz ,67hewubega $0.12 \; m^{2}$ 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 cm/19nt*a4g ;awc 4ypag7 ixf yrcg;x*urrent of 2.0 A is in a magnetic field of 3.5 T. The ;*cywn tfyx1x4a* a7/ c g gi9gp;m4arloop has 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 fieldypwo0bh( o6 m( of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the looppo(bw ho6ym0 ( is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is )l7(lepx) wu bin a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magp ule( )7lwx)bnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area 1 wnpmtk/7:q;pjt z4w$0.25 \; m^{2}$ 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 si+qbs; jo6f y/r vk0nj-ngle-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 wj;d6 aa tok9*yith 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 kVv*ff d pbj8xeb3z 0w3e gz16/d and then moves into a magnetic field of 0.040 T. What is the radius ofxwvf0jdep 1b* 8 ez6fb d3/gz3 the proton's resulting orbit?

  A proton is accelerated from rest throug74hw 4y *v1ainnz9*mbpkac x0h 500 V. It enters a magnetic field of 0.30 T oriented 4n *cv1 zy4iaxw0p7n khmb 9*aperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated ypb1+2yuf2nw8jg 5 wcde9 bk *h) ue+sthrough a potential difference of 10 kV before entering a velocity selector. If the B-fie+d1uy5+w cnjs*hbuwe92)b 2y pg ke8fld 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?