If the north poles of two bar magnets are brought close to each ef+o 7fk4,0m qmc2cmaother, the magnets will7facem 0c 4,qfo+mm2k

  If the south pole of one bar magnet is brought near the north pole5ar 4*is( srti1 o0dzp of a second bar magnet, the two magnets wr 5tzai0(rio1p4 *ssdill

  If a bar magnet is dividem:iukv-w mx6*d into two equal pieces,

  The Earth's geographic North Pole is magnetically ;hq g3k2jqp+nxk3 sc3 a

  The south pole of a magnet po3ab bgme,x0 9kints toward the Earth's

  An electric current prodrwglllm qwq5 k ( 9a),(fz/z9ouces

  Which of the following is correcz zf8a-p gpe0fl38rf :t?

  A vertical wire carries a current straight down. To the east of this wire, the *p np4mn ) .ud*diint0magnetic field pointsp*ui n0dnp *i.n)4dm t

  A horizontal wire carries a current 6cqig4;qdo ut-zz8.bj (i9mvstraight toward you. From your point of view, vqu .4o;m9gc tdj8 ( ibziz6q-the magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from abmr ux. 0syt;d9ove, 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? T.y su9;r0x tdmhe magnetic field

  A current carrying circular loop of wire lies flat on a table top. Wh xea+xf*+o w9gen 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, inside t9gafeox*x w+ +he loop? The magnetic field

  The SI unit of magnetij.n0l7ec wfo hd,ma:v;-t h/xc field is the

  1 T is equivalent to/at2hxa0h-, g,zf rtb

  The direction of the force on a current-carryingq0 ljsk h-pp 1;jfheiy29d 9.g wire in a magnetic field is described by wg p. d2j -0fq;ps9khl1h9ieyjhich of the following?

  The force on a current-carrying wire in a magneticq80*5weuotmmws4 r4u/ : ifdp field is the strongest when

  The force on a current-carrying wirf;et0i4 .3 gwwioh,ib e in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in afn u8j c;a.q2c region where the magnetic field vector points due north. What is the direction of the njq2 .fcc8 ua;resulting force on this current?

  A charged particle moves and emh01.j a.qrn)jg5ok cxperiences no magnetic force. From this we can concluakc0. 1)5m. rjqonjhgde that

  A charged particle m f*o-lq uezb-lj,. gt0oves with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force a-qz. l-0go lje*,tufbcting on this particle will be maximum when the particle moves

  A charged particle moves across a constant +mvtzc6+er7n +, 3bcytg1; vtna z.bamagnetic field. The magnetic force on, tbt.eg3nc1trbv;n6 zav7mcy z++ a+ this particle

  A charged particle is injected into a uniform magnetiq,vxd*- 0i)yzm2ginb+i 0dr rc field such that its velocity vector is perpen,iy+n0i2*0 v-dm rzdirbq g)xdicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling /auhlu :)y0vj in a circular path in a uniform magnetic field. If the particle had been traveling tuly:/ j 0)hvuawice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels imge--yno/:gl o sq. 1zy1t2 fdn a circular path in a uniform magnetic field. If instead the particle carried a c1/no2f.:ye 1 qyz-slm-g tdgo harge of +2e, the radius of the circular path would have been

  At a particular instwlyhgw68mk5:mcuc 07ant, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it isw5gwh:c y7l06mum 8kc

  An electron has an initial velocity to the south but is observed 2k:ou svf8j7ato curve upward as the result of a magnetic field. The direction ofs k2ajvo8 f7u: the magnetic field is

  An electron moving along the +x axis enters ln ie n4(h6bdw2o-n,m a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x inh2bnwn,6m -ld4 eo (to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carryinebo2*o f*ak*gg wire is

  At double the distance from a long current-carrying wire, the strengthrc,nxm .5pv y( of the magnetic field produced by that w(cyvm. xn5,rp ire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry i b,ncjomhnci+ (s a .e33;b/lng;1 qlkdentical size currents in opposite directions. The wire on your right carries current toward you, and the wire o3;k1n e +,s lm/b3lajbhg onn(;qc.cin 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 placedq2g*)a1 xxtu uh6 hz*x side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the2) 1gqh x*a6h* txuxuz two wires

  Two long parallel wires carry eqm4nhl jjri1 ,c27q1gw ual currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of thj42,gnmcwq 1i h jl71re new force between the two wires?

  A long straight wire carries curre:ouej t y01n:atv5lr:nt toward the east. A proton moves toward the easte:l:ov5u1tn:0ray t j alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current towar7,ewe 8*y dbldd 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 thwy8b ldd* e,7ee plane of the page, from your right?

  Two long parallel wires are pl et+c;mfy5* / qtowmnrpm144e aced side-by-side on a horizontal table. If the wires carry current in the satnpwrmotqy/ c1 + ;*e4emf54m me direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the wp( 7dss f/d5vpires carry/7psdd5f (sp v current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one smoc(4,dxw(n3 ib zi;rtrand 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(dwxor,4bnc;( 3iizm smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both*ivgpgx;c 08y2ska a3 are made from one strand of wire and both carry the sami23c*sgakxg;0 ay8p ve 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. *;1o cpc vax*u(kokl carrying loop occurs when the angle between the loop's magnetic moment and the magnetic apc1kk .o;c*oux* v(lfield vector is

  When placed askew in a magnetic field, a current carrying loop that is free tow(;58d 6l6v caiafxka rotate in any direction will experience a torque until its magnetic mom5fda i6;l8w 6a(vk cxaent vector

  What fundamental fact underlies the operation of essentially als*5tcw w9g. j5 xemuh6l electric motorsxmw. 59she5g6* wctju?

  A circular wire loop lies in ac fes9hyg8*gn p)9s yjl2mx2 * 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 side of the co y8x l*jfp2mn*s 9ghg )ye2s9cil 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 paroclf ,i )pb+*wticle 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 tf l,pc)*bi+o whe 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 particl srulp)cl6jh; 9*y )ble passing 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 particles move toward the east, and the magnetic field is diu; jpyb9 ls)hlr)6*l crected to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallew:)kj e 3wjvk0l to a uniform magnetic fi0) j3jwkwe:vk eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 vk xh xi)2b6/l4kfy)z 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 perz9criwk .u2 b9m a y1cosn64e0 meter on a straight wire carrying 5.0 A when it is placed in a magnetic field kb6y nmri209o.z9w1 4 ecasuc 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 i- w mie9nvep0;nfqhvp*0fk*, vm, 5rwb+u mu 9s in a magnetic field of 0.10 T. What minimum current in the bei +, vvqvum9pm0; umkh*-rwp, f90*fn ew n5rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in +m0wv o:o t,3x 1zdi7aknlxv 4a uniform magnetic field of 0.20 T. What is the magnitude of the mx:iod1 +0m43w vokv,l z7atnx agnetic 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 of /9y9h qnr 6ceqe mh9n2$5.0 \times 10^4 \; m/s$ 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 spe3yr cc:tvpi.6xb2.+(mb vtx ged 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 w2nhfx0:x:ca mdf 2ry;ith 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 of 4dr7e s1mip3b $8.0 \times 10^6 \; m/s$ 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 x t5z7 h;gk+yb:)ebvu a 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 4 a/4-briagqf;shc7vc77 btn 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 al,q t7 p3b rztt .d1*tftiqw4jp(3 0tq current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?l jw3 i,bq3(t4tqr *70qttp1zf. dt tp

  A high power line carrying 1000 A generates what magnetic field at the groun/ei9 8(:w*cm agpq/h+lzkdwr d, 109i*epr zdmhl qca :w/kg/+(w8 m away?

  How much current must flow facyrxe5v) t0tsj5ng r72u y:3or $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryiz mmoi zv pj9s44m5+(cng 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 magneticom4mz9mvi ( sj 45+pzc field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directionwg:(ds x r0i0xs. They are separated 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 other0 ( xd0xwgr:si?

  Two long parallel wires carry curm5fex) j6v r.lrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is thej)e65m rx f.vl magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dii)egn9lhs4+yy .g6horections. The wires are separated by 0.20 m. At wh+4osy) gy6 hgh9nli e.at 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 direg4:v j)- gd1avxm6d b(mhd7jection. 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 djb -jghde4 vm x1avdm(6g7):plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5xx wk9dnhdf y)4:h28q7 u-kep.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 mxddp 7whuf-9hk4yex :kq8) 2 n. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at thq/v4g:lri o +se center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows ii4lr+sog :vq/ n the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What cd gibwy 4h r .,36h/c1vc)frhmagnetic field is produced at the center of the solenoid when a current of 10dbc h6yg1rhf/r) c.icwhv43, A flows?

  A solenoid with 500 turns is 0.10 m long and carries :5 9: hn:3urp cuolacja current of 4.0 A. What stre:uhca:r :5j3olnp u9 cngth of magnetic field will it have at its center?

  How much current must pass thrhynq 6r3yj0w6 gd/jjro5x)f 4 ough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the cqjh /0f6yxrj) r5w ngjy 6od34enter?

  How many turns should a 10-cm long solenoid have if it is to htt s q;.-9x7 m-ya6wei6yofmc x l+3mgenerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic mo 0 481jv uheushapxs6bt3d z;j k7o3h8ment of a rectangular loop of 120 turns that carries 6.0 A if its dime1uj3zoh a3 84s xtd0hsjvup; e786kbhnsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnt p0j2 +li5ns8/l.go iwjia 4yetic field of 0.30 inwl+t .2 /si0oai jgj854l ypT. The current 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 cross-s 5z7p:obx iqe3kjb ;1noftkq0 -lg b0/ectional 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 cgb.yh86oxn/8qok 5 s k*w)adT. The loop has . dxoh 8skq*cga/w56no)kyb8 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 o0 a t78wibo6mxf 0.30 T. The currenxw68 a0ibomt7t 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 ralkz3,a7, f 1hwed6 x mpx-t,wxdius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loopdm,z1ww,pt x367a xhlf,ekx- is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of areannl wmr)qv6;2 $0.25 \; m^{2}$ 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-k so9bq;4c9eycharged 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 with veloc;j/v a((gdxp yer,tvavpnx/,pnt)v-1j5z l.ity $6.9 \times 10^6 \; m/s$ 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 then moves inxib:r:/aazlb u,:h0rto a magnetic field of 0.04: a:rbl0xi rh,/b:ua z0 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic f ,lzgk a;grasv73)yl/ield of 0.30 T oriented perpendicular to its direction of motion. Determink yvg3z;7/lasl,ag)re the radius of the path it follows.

  A beam of electrons is accelerated through a potenoz:8 g 4axl 7uhvo(j0otial difference of 10 kV before entering a velo7v0z8jo(ohaol :xgu 4city selector. 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?