If the north poles of two bar magnets are brought close to each otheri7k y8r 4ugctk812d c18pywz i, the magnets wilz 8i 1r1kud7c8 4kg typiycw82l

  If the south pole of one bar magnet is brb:1u1uvw k :jsclb, j5ought near the north pole of a second bar magnet, the twouwv1ckb5lsj 1ju :b: , magnets will

  If a bar magnet is divided into two equal pieces,8nh b*v kci2j5

  The Earth's geographic North Pole is magneticalli4,+iik yokt 5y a

  The south pole of a magnet points toup4tcj+g- mylgh myk 5kg u)l4;idrz- ( w.)d3ward the Earth's

  An electric current prod 1pnoti 0i-5drh js*e/2(lyshuces

  Which of the following is coa6f7ym5 sjh4htpgbg07nt ;l6o /e p4 lrrect?

  A vertical wire carries aezb:wcyfxvux m)*3..,- hne.6rv aco current straight down. To the east of this wire, the m-n3c .xmxa .:zv*e,f).uwbco yeh6vr agnetic field points

  A horizontal wire carries a )yott2pv. sk9(6 hmd6*solby current straight toward you. From your point of viewl2k.vhy9sm6p6)t toys d* o( b, the magnetic field caused by this current

  A current carrying loop of wire lies flat on a *l :,k f*x4 nf9nlfh+59i y4luyozpdrtable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magn+* * 5lid,ky f4fphlof9rxznl: 9ynu4etic field caused by this current, outside the loop? The magnetic field

  A current carrying ci .7ulb caw-rx fq4/(iircular 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 d(u -c7.ilab/xiwfr4q irection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic t ) ;dqkp4*k joy29jxf7p7n rmfield is the

  1 T is equivalent toz( umv6e qkn*nu:5f0p

  The direction of the force on a curreig a)fsl:il2 zc+:23hsht(0 2ed yokgnt-carrying wire in a magnetic field is described by which of zg( hldsi gaisoch 3tl02ef+2): :yk2the following?

  The force on a current-carryi hmgtwt/ v5ktii8)c3/ ng wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field gl7dmi w,ece,t (2u; iis equal to zero when

  A vertical wire carries a cu9yw8ddp91we tb o3,agrrent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on wd39by8dt,a owg 1ep9this current?

  A charged particle moves and experiences no mv c)hjb+f*- eq(j8jdk/l+1 pbu l)pazagnetic force. From this we can conclude thkb+zppe)(jjl la */8)c1qufv-bd+jhat

  A charged particle mpn6x.;8*b qiyksa1p 9 yyscl2oves with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting sl;9iykb1q 6nxs y p*pay .c28on this particle will be maximum when the particle moves

  A charged particle moves across a constant j k4+we g3.jpi(zjp0 rmagnetic field. The magnetic force on this parti j4 pkz(+eigj 30wpr.jcle

  A charged particle is injected intz z/*2ap3dwuk o a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's w 2u wp/a3k*zdzeight, the particle will

  A charged particle is observed traveling in a circular path y4k2rb3 ti/: sgha-fnin a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would b bk gtfy/:r-2 3inhsa4e

  A particle carrying a charge of +e travjq/1 bl-rtrf7 5/bw7r*nvny tb 8e+pyels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius orvrebn7 1*jtl+/qwbb- p ntf /8 57yyrf the circular path would have been

  At a particular instant, an electron moves eastward at speed V1ip 8 w/ ;uadf4j/nw.k.zgz4pt y)g ;pi-xadq in a uniform magnet-aw.z; gdi/ukw )p4f8/d iptapg 1nx 4yz;.jqic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initialynld7 +c5p* dg;p fga(q*7bls velocity to the south but is observed to curve upward as the result opl sdgfp+q*dcl7y *g nb7(; a5f a magnetic field. The direction of the magnetic field is

  An electron moving along th :b 5zhbos*/7t skgv)me +x axis enters a region where there is a uniform magnetic fiels/ bvg mb5 k7tsh:o*)zd in 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 pad jq ,lk ubb5y/*l1g+r vd7m9roduced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, th 5w+pqymie 2h9e strength of the magnetic field produced by ewi92m+phq 5y that wire decreases to

  Two long parallel wires placed / on2xs)pn9d zside-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 magnetic field at the ppxdn9on/s2z) oint exactly midway between the two wires

  Two long parallel wires placed4x1a/4q n*xo60r wxk 0 r:srascm/ tfd side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fieldrs:nrs0fc q4a *6oa/ /txw04krxm 1xd at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of thinn jdpt0p2) 5e force between the wires is F. The current in each wire is now doubled. What is thepnn)05tijp2 d magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton mo3dg) +o pn.lqtf0 0ilfves toward the east alongside and just south of the wire. What is the direction of the force on the .)t3qpg+0fol lnd0fi proton?

  A wire lying in the plane of th9n.a4bit 6. /rvrrwgye page 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 toward the wire, also in thtrv .4/ w6ai9ynrgrb.e plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a:1y p) 0mmqgwv horizontal table. If the wires carry current in1qyw)vp0:m mg the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tj yeo0gq/;t;*j gk9 svable. If the wires carry current in op9 ;;e g0jojy s/*kgqtvposite directions,

  Consider two current-carrying c nisnrna:xv ) x62yrd:za (:6oircular loops. Both are made from one strand of wire and both2ay6 ns zo)6nxxi n:(v da:r:r 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 ,z v.szf7ykyutv/v4 zi3*h, yy gs9v- strand of wire and both carry the same current,y y*zuhviyfvv4z,k 7t 3s -gysz9. v/, 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 onf 1g(d n57sg)2z)xjpuu(h,y ms8 efsz a current carrying loop occurs when the angle between the loop'us)85he2dxm1gz) njy7 psuf(gf(sz , s magnetic moment and the magnetic field vector is

  When placed askew in a magnetic fieldfla6l;:jt iw/hx46gg , a current carrying loop that is free to rotate in any direction will experience a lgwghfj/t ia ;x6l6 :4torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric mot -uocxdoa5-(ors:7 t/+gdj taorsrs/oaoc5g- j td7d -tu(:ox+ a?

  A circular wire loop lies in a horizontal plane oro rq* 6c47a6q2d;ly52 i fyqv5jk nzbn 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 wir52d k qy6c*fqbji ;6 4oarqlz75vyn2th the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated tqrihu6k: 0w.;tf8ox8. 3yzsh 1 qqt rchrough 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 perpendicyqrh 3h qtzts.8q0;uciw.fok r81:x 6ular 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 consiskivij)1 v z2n0ts of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain venv1jiv ik) z20locity 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 oriented parakc (4(pgmmg;;knes x7 llel to a uniform magnetic field of((cng ;;k4 xk7gep mms
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of c636 gj y)xzafqr(m/ooq8/v rsle- n ;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 wire carrying 5.0 A when it is plafisb syp97-s. ced in a ipf-bs7s9.s y magnetic field 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 ,zy5kc.ws x; bmass of 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 ; zky5b, .swcxto cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 e8 b) ud:5f6 7jgvlemis15cp :e9kerxT. What is the magnitude of tvef6pb8 sir9xl5m ce7egu: 1kd)e:j5 he 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 with a speed jj,v*li82q s 6sh-jh*h;nxlt bq 7v7j 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 sp1 z8q6i /(.pra(oewmnk- xsyk eed 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 wippni5q4fv p6 2zjg w/4th 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 spee0u* 1qb2he krrd 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 spf+4zll1/ l6hr)r elqheed 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 jeadddvmz:u6g( 4pz8 76xq1 n+ p3qekof $3.0 \times 10^6 \; m/s$ 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 magnitudcbw 31q(f hcji.t/.gw e of the magneti(f.t wjigq.bc h 1/w3cc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatespio / *i:jd0v8 tfsy/o what magnetic field at the ground, 10 m at /jiy0i:o/s8 * fvdopway?

  How much current must flows1typy oa-8-k wt se(1 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 5.0 A9rlze )1h*..iqijte nzv7 f+e is the magnitude of the magnetic fiev.hne1 ir +zjf)q9liete7 *z. ld 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 dp+by mbxdg c l/k0)gl:,nn5610 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wiresl x :)+y6gdd,k0/gm5nc np lbb at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires cay. ff/ csf4v0brry currents of 20 A and 5.0 A in opposite directions. The wires are v0.4f f/ sbfcyseparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A s8,; zvrffjp4 in opposite directions. The wires are z8 r;4f,j vspfseparated 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 ;gig v:cu9pr*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 of the wires experience due g9cr; *vpigu :to the other wires?

  Two long parallel wires carry currents e.bg rasp 6+6tof 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic foebps +r6g.t6a rce per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of r j 1 au-2kxm1o+klmqc1adius 4.0 cm when a curr1juxk l1qk+am o- 1mc2ent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound wi+(r ;az y 0kx*obrfs8tth 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10r*;8 af0kobryzx ts(+ A flows?

  A solenoid with 500 turns is 0.10 m long and carb3h:.g k ol0aek6);j hl(lz wlries a current of 4.0 A. What strength of magnetic fieleh6b0kh.(lg:)jlkz l lw3oa ;d will it have at its center?

  How much current must parm24xr mgqc55ss through a 400 turn coil 4.0 cm long to generate a 1.0-T magrmq r55mgc24 xnetic field at the center?

  How many turns should a 10.v3:uq au8r;lenb , dj-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 momensb nkj74 ucnk5gk)5 4wt of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cm?g5un)7knws kc4 5 j4kb

  A circular loop of wire of radius 0.50 m is in a uniform m c*l7 9o,jmsoxagnetic field of 0.30 T. The current in the loop is 2.0 A. What iojo x ,7*9mscls the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-se5wonq1dlo5 + w3b5 uohctional 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 fa4x2 t* *v r0hvz68t9 f(sfdemabq4b jield of 3.5 T. The loop 9b*ze sqv6 htm0x4 fa*(bf24jvd8tarhas 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 h9(a(7hnns)c8 qw zdk.30 T. The current in thn h(a8)wd(qk7s9n z hce 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 wi.:x-ub q0hgh o64fb fpre 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 the magx p gu:-o0hf6bqh.f4bnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop o iak,; 2)h9plh2;uobp jnwe-g f 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 (charge s8.yi owql 23fr*ncx/-iuy 9fe) 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* m ;sk; 6ht1+;qgqb rtpna5de 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 o-enj4k)(ht xc.cz 9ypotential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is thy9.z(c ce k-no h4jx)te radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a mage q mntw/7al3zs 0y4*vnetic field of 0.30 T oriented perpendicular to its direction of motion. Determi/0n*zm7y4lqeawvts 3 ne the radius of the path it follows.

  A beam of electrons is accelerajib0*q g0 kz*oted through a potential difference of 10 kV before entering a velocity selectori q**g0zojb 0k. 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?