If the north poles of two bar magnets are brought.xdks:ub 6 4qgiz0l1b close to each other, the magnets wilsiz0xbul.g 1dqb46:k l

  If the south pole of one bar ma4on)qxbdne p-lz +;w4uen3b * gnet is brought near the north pole of a second bar p;)u oeb n4zx *+qe4 wlnbd3n-magnet, the two magnets will

  If a bar magnet is divided into tw9 bjwo4rl7 :ii9w nrz,wg9i4dlp)6cgo equal pieces,

  The Earth's geographic North Pole is magnetiv *sxp,ze ci: -g;e8ylw8 o2hcm)om4pcally a

  The south pole of a magnet points toward the Ear/wjfw+4x 2uou m*wli 1th's

  An electric current producesy/sapuf;599rj q6r+h-, bhw puakhi3

  Which of the following is corr*q f4twbh-/10b 9qfwn 5rv gobect?

  A vertical wire carries tx idfex:oz8rc,qv(ih ;:. c0a current straight down. To the east of this wire, the magnetico8 :xc(feidh.rv xc,:0 ;iq tz field points

  A horizontal wire carries bo5: *uj(u b3cmjnw(p a current straight toward you. From your point of view, the magnetopwc3n :m b ju5*uj(b(ic field caused by this current

  A current carrying loop of wire lichlll5q1 )9do es flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the )q1 95l ldoclhmagnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loopc;bsqakz xa qc4 4n84ah 35amx9 6(kcp 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 dir54(k a48zma 4bhpackq9x c;xcnqa s36ection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneticgwn+1v3 o /g.bw4jxykc7 zs u( field is the

  1 T is equivalent to s)6ve1,fik3pvt)bxo

  The direction of the force on a csn-,wi +e jr oj.y/yp5urrent-carrying wire in a magnetic field is described b sjiw+/j-or,.y5yn e py which of the following?

  The force on a current-carrying wire in a magnetic field is thxo;q3qoch; )a r *gc/jehag 3argdk *ai u87)5e strongest when

  The force on a current- dp y b/z/xdojj9ik.1vtl zq 4;3s7z;pcarrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magneto wp6joh h)45q:txh. jic field vec t:4jhx5q)hohjwo .6p tor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetid f:kttwcu*:0 r6r; it/jol y7c force. From this we can co :7w ckr6l/iduy;f*0jo t :rttnclude that

  A charged particle moves with a constant speed through a region whercp d,hscf+h*2e a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this pa* c2 d+sh,cfphrticle will be maximum when the particle moves

  A charged particle movepbm :x t5j9tk1+9u qqhs across a constant magnetic field. The magnetic force on this par j qtp+qb99 :1t5ukxhmticle

  A charged particle is injected into a uniform magnetic field such that its velot*s3 l qvqou jj,; 3gxe1;jzc,,dhw(fcity vector is perpendicular to the,f,s 3, 3el xdz*jgow j;uqcq1(jth;v magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travexv4p g*uv14lfzv(c 3iling in a circular path in a uniform magnetic field. If the particle hadz4vvx1 4igpl3f*u( v c been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a c ;n9gd ho+vz7sircular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular p; g9+s7vhonz dath would have been

  At a particular instant, an ejxc78 l+qsv7klectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it xclqv+ j787 skis

  An electron has an initial vel:ra:4awjgnm of2:q. oy * g)ueocity to the south but is observed to curve upward as the result of a magnetic field. The direction of th:)uefry g o. qj::w n2*aa4omge magnetic field is

  An electron moving along tv)e5 h+gb3b(fewn sa+he +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic foe+( 5g 3fn hsv)b+ebawrce on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire is9rw y-4qs jf;1r9fs woaz0wv-

  At double the distance from a long current-carryid61kd+wmk(h k ng wire, the strength of the magnetic field produced by that wire de hdd1m+6k kw(kcreases to

  Two long parallel wires placed side-by-side on a horizont iir3d.,imfx2al 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 vie , xf.32idimirw, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on zj 8 lqb93,r-qcr+uw(nof8e ja horizontal table carry identical current straight toward you. From your point of view, the mag 3rl8,zbr eju8( 9qqfwonj c-+netic field at the point exactly between the two wires

  Two long parallel wires carry equal curr0 g. y2o2hkh3idm *4 ymou6qbjents. The magnitude of the force between the wires is F. The current in each wire is now doubled. 4 2iko j0y*hgh3ymmdu62. ob qWhat is the magnitude of the new force between the two wires?

  A long straight wire carries curr:mvy2t iklz3 +ent toward the east. A proton moves toward the east alongside and just south of the wire. What is the directiv2z mt +3k:ylion of the force on the proton?

  A wire lying in the plane of the page carries f3pwdl( 2s*vm9 3gqee a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpeepf *39g2mewq(ld3 sv ndicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on y, co)rjerdy -vh 90,ya horizontal table. If the wires carry current in the same direc) ,0 ojr9ydcv-r,yyhe tion,

  Two long parallel wires yxd29ty)kn) u q9cd22u mmfr1are placed side-by-side on a horizontal table. If the wires carry current in )922 f9 1uyntdrxc) yu2kqmdmopposite directions,

  Consider two current-carrying circular lm5nv-w8h 3f2r tox+2 ct 1uqhmoops. 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 tw o1mtfvh t52r+c8uxq 3nhm-2he magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying ci5i hn)j6sxh5drcular loops. Both are made from one strand of wire and njh5i x)6 dhs5both 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 carrying loop ocn8+d :1l*aqilpp m jd,curs when the angle between the loop's magnetic moment and the magnetic field ve+*:8 nqjp,idda m l1lpctor is

  When placed askew in a htkn/9oh).rz magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its m .ht)n9z/ohkr agnetic moment vector

  What fundamental fact underlies the operation of essentially all elect pb0e90ox9xoc ric motorso 9oc9 0xbx0pe?

  A circular wire loop lies in a horizontal plane on a i*n:cfu,p1h u 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 horizontauf1,p :h *ucnil. 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 mp d twiriyjf c4o2- .qsa6-hcu6q.z,1 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 expressiisfzc1c6 -od 2 i6q4.ap w. -tyjuqh,ron for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing throughgr /6r rxr13pya)w ,ja crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles o rypjgw r r,3/aa6x1r)f 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 curre8mr7p7k)tz* jjta 6* ooa :1kqqoa5jnnt of 0.60 A is oriented parallel to a uniform magnetic fie7o aj:jn 7a*8tq56)oo q t1*pkmzakrjld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direda3- r c2u)n- yorep6wction 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 place hzn- x n.ax4zwj,mqlr.q7.:)pevj1fd in a magnetic field of 0. ..afnvzq4n-p j7w ,zx1jx m.er:h )ql020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long ha,(s a2sfpk(hus a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is n(u(saf 2 ,kshpeeded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is hoo;k+fxd9p t*x*:ekthe magnitude of the magne ;oko:p* +9xkx* htfdetic 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 sjju1m(r u;9izp 5c zl-peed 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 spned3cs31b k* 5y s3lvpeed 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 travelin-j7 lqjh 642za d scm: 2j.k0+sllwscjg due north 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 speej x94(zn1pnhhd 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 speqcc+jq6(b7 vlkt) 3bg ed 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 orwx65skyj -80usza:p;/ vyys f $3.0 \times 10^6 \; m/s$ 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 rvov7u89*nkjwu*n(w g b7,sqA. What is the magnitude of the magnetic field at a distance of 0.1k9 8s*wnj7q7v, ugb wnour(v *5 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the 7c++kgury h/8i 6z inrground, 10 mcy7+ zrn irg/+ui6k8h away?

  How much current musqe87 x-zhwr( lt 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 5.0 A is thei lv:t/2)pa)+hp ln by magnitude of p )ilapnb/ ylh t2:)v+the 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 in opposite directions. rc/f jt:8/13xmhpgz t 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 thefc gx/r:jht1pmz38/ t other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directio 9pqv,l0)n vglns. The wires are separated by 0.20 m. What is q)v0l pvn9 ,lgthe magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in qxsg:0fl) gyb ifw (e:x6h g0a87q9is opposite directions. The wires are separated by 0.20 m. At what point between the two wires are 60f0hs :f)a8 gyxw ( xg:qqs7iibge9lthe contributions from the two wires the same?

  Four long parallel wires each carhez j 41vwo3q3ry 2.0 A 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 magneti 4hq3z3vjeow1c field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in th)s+ .v sffgi0se opposite direction. The wireg0sifsf)s. v +s are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a c,luv:m-5jfl:;d eyj7at r+uh ircular loop of wire of radius 4.0 cm when a current of 2.0 A f- m5eu+lhuaj:j ,;: fl7ytvr dlows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fib1ti ww:xn1 7bo c9gfph;37umeld is produced at the center of the solenoid when a current of 10 A ft1p9icnumg 7o ;7 xhwfb wb:13lows?

  A solenoid with 500 turns is 0.10 m long and cx27;h ce fofz9arries a current of 4.0 A. What strength of magnetic field wil9xf z;ce7 h2ofl it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate xu0evjpn7x88 a 1.0-T magnetic field axn8pxe0 8vu 7jt the center?

  How many turns shoulcdi x,(g16 h1ckus:o sd a 10-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 turns that x-yabc( s;rq7(0haq ecarries 6.0 A if i0 xay(cq be-r;as(7hq ts dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform mprfvc oy *143 6zgxr+cagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is pec3r vog rx+ 4p6y1zf*crpendicular to the magnetic field?

  A circular loop of wire of cross-secti8i3 ,etzxxy /oeecx drvx68-2tt:tl/ onal 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 mayck8d9 rw )hm+gnetic field of 3.5 T. The loop hmh +cw8r k9yd)as 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 mp4rh +7 owhg6bx m9h3*oujwr- is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whh97p rux rh3+owm4j *obgh6 -wat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 33ncl x2r dzfn ,p/x+km is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torquekc xl rxnd/z3fp2, n+3 when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of 0 yh l;+(dkxtxarea $0.25 \; m^{2}$ 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 spectrometergi0om fg+n; *p, a single-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 o(-gtey 9+ oiowith 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 kV and then oaoquhxis v/ -u8hjs l774o9+moves into a magnetic field of 0.040 T. What is the radius of the proton's re o/9qu-s+4 loa hiuvsxo87j7h sulting orbit?

  A proton is accelerated from rest through 500 V. Itz i-v6vyexm-by1,m1jw:rk3/ csp) q k enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it x wyq-jk,r3 vpb )mcszm/-ek 1vi:y16follows.

  A beam of electrons is accelerate2zzkiwp8*tue68xi 1 1;f tob kd through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, 8zp;w bf6 tk8ti ozx1e1uk2*i what value of the E-field is required if the particles are to be undeflected?