If the north poles of two bao 0e -ua 9/ oq+6tnld;,pegahjr magnets are brought close to each other, the magnetsjtd/a h9e+,; p06-ou a oenglq will

  If the south pole of one bar magnet is brought near the north pole of4g1v)ckl9 h *0ro0l.ss7 b yiw ecsj*k a second bar magnet, the two maeg)4sy9srj csoh* 7 vb0 kicl0.k1 l*wgnets will

  If a bar magnet is divided into two equal piecew0 o)bhk3h /j ;10sbee)e pb+zzhs7f ss,

  The Earth's geographicwb hr6e3 4fzl2u:;pw q5ugx6 h North Pole is magnetically a

  The south pole of a magnet p )s1c mvd ad28a2lex7w: aktp7oints toward the Earth's

  An electric current produhv6vc0 xxcs 1wwtl.7/ces

  Which of the following is correma7h 1tsvj+ f0k*.iyuct?

  A vertical wire carries *hx (r; terjb9a current straight down. To the east of this wire, the magnetic fieldjrh;re*t ( xb9 points

  A horizontal wire carries a current starr9w: 5*q ckoma df91raight toward you. From your point of view, the magnetic field caused by this k19wof mrcd9*raa:q5current

  A current carrying loop of wire lies flat on a table toxlx5 9kr5x-hvzg+ l- 3)pjxgbp. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by thiskxgjrl+vx x 5x3 l9 -bg)5hz-p current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat onljqw(/97dgui 8 4tdvf a table top. When viewed from above, the current moves around the loop in a counterc7 ftgv /u4q8li( dj9wdlockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magne i9qvkyfw(0r6o:je+x2f f o(rt5isv , tic field is the

  1 T is equivalent tolg u:cakxr5 y4;f4o r/

  The direction of the force on a current-carrying wire inelevz*)im;v(8 q lmr8 a magnetic field is described bvi8 mv rm*e8ezql;)l (y which of the following?

  The force on a current-carrying wire in a magnetic field is the st44qa*z,1-u/2obe (ehclqc mxlnr z9 krongest when

  The force on a current-carrying wire in a magnetic field is7mcmcl -*a v+d equal to zero when

  A vertical wire carries a current straight up in a region dgksst 9,./gd d,2fplwhere the magnetic field vector points due north. What is the direction of the r./t,sldd9g,d sgp2 fkesulting force on this current?

  A charged particle moves and experiences no magnetic forte4pc,bi( ;p4bmc32 ev z:mrece. From this we can concludem (4pc :bteme,;czib p rv423e that

  A charged particle moves with a constant speed thro1k9x kuzeh:xfd+o s ; 89hnu1kugh a region where a uniform magnetic field is present. n+1o h9szk;e:f189ukduxhk x 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 acro ;cy(5aryb;f0g mxvhl 8zggc52jf+l.ss a constant magnetic field. The magnetic force on this; 5(j8 +2m0 rafx5;fzll ggbcyc.ygv h particle

  A charged particle i7ec8 uyj,z bs4ib4vs. s injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the pi7ecyv84,.b 4 b suzsjarticle will

  A charged particle is observed trdevg8q h/k-fd8elle rypy*k or+ 1*a2q69:lbaveling in a circular path in a uniform magnetic field. If the particle had been travelikb8 8ledq -kr+l *lqypfod *r296yha/:vge1e ng twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cid( 3fw20zjhp drcular path in a uniform magnetic field. If instead the particle carried a charge of +wph( dfjdz0232e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a un2oxjj;5q 0xp 4mcgh 1yiform magnetic field that is directed straight dow5o1j2 ;0gxxpc h qymj4nward. The magnetic force that acts on it is

  An electron has an initial velocye: g(h0hqv mj4/v/g city to the south but is observed to curve upward as the resuvgmv0 y/ h/ehq (:jg4clt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis entersr)a.fkfg*4qwggvm +8 a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic forw)gv4 .f8fqgm*ra+ gkce on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current4v q;vnyn 342t noq7lm-carrying wire is

  At double the distance fr8 xfbzyc*))ix*e 7xeei:mx 3zom a long current-carrying wire, the strength of the magnetic3)xibi*x)e7:yx e8zzx me *fc field produced by that wire decreases to

  Two long parallel wires placed side-by-suiyc n.w,;fv hl8c/kdn)ys )kl:9:azide 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,yvn/wi k:);:k )c zdy9 shufcn8.l al you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed sid7ioth39/ g*aebwt0zd0n; c fwe-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point ;dw /9zf*0 c3i7ota0we hgtbnexactly between the two wires

  Two long parallel wires carry equal currents. The magnitudela/ x) igls6l3 of the force between the wires is F. The current in each wire is now doubled. What is the magnitude o)al silgl/36x f the new force between the two wires?

  A long straight wire carries current to(l a4hn(.ursk c7gyi8oe 0ku:ward the east. A proton moves toward the east alongside and just south of the wire. What iu8kn47o h:ks. y(ie ug ca0rl(s the direction of the force on the proton?

  A wire lying in the plane of 6t xw9hxdcwka/k v8kua2 d 4. 7tqsc3:the page carries a current toward the bottom of the page. What is the direction of the magnetic h 97xwwtkas. 6uk8ad 4 d c2x3q:vckt/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 ard(u :ppshg (1xrok ;()2ixxve4/zxw we placed side-by-side on a horizontal table. If the wires carry currgo4(ix (:)zp1rs/( hvk w2 xed;xxwpuent in the same direction,

  Two long parallel wires are placed side-by-side ona*-yop2n l d ::dcekh( a horizontal table. If the wires carry current in opposite dylpodn ed(2- cah*: k:irections,

  Consider two current-carrying circular loops. Both are made from onh9)q )uqpq)ue1 gr k)ee strand of wire and both carry )keeq)9) qqpu)u1r gh 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-carryie o5./)lbkvd+oaq ln9,apyo.lu0/ m xng circular loops. Both are made from one strand of enqyv9 ab,k 0po+/ d.m5)lolx. o /ualwire 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 carrying loop occurs when the angle between the eqeo)ocza.smw( tas*dn w8 ,v 2:9 *naswdc s8mn oa,o(*): eq *29z atnae.wvloop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a curxppvh +//yo:drent carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment vecto/h+:d voxyp/p r

  What fundamental fact/ tqi. n :px4y*xut*ld underlies the operation of essentially all electric motorsy *u4p:qnttd l/x ix*.?

  A circular wire loop 6as r yl);n,bslies 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 side of the coil tends to lift off of the table because of the tol, 6bar)ssyn ;rque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of so5nuhuve6:i k1** hy,, a iypmass 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 orien:nh iv,,uh* e kay56ops*uiy1 ted 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 through i*9u fk +ckdid ..ik:6euhf+rcrossed 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 directed to the north. What direction should the electric field poin k6i.diifd+ :hk+rkecf*u9 u.t?

  A 2.0-m wire carrying a current of 0.60 A is oriecp+ 3 grn+ i0qo5dpoe)nted parallel to a uniform magnetic fieldqn 0dpo5 rcp+gei)o+3 of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1odte 0-( bdmav83qdq :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 pec j++cbszdi;ae z. s7) dm(z2er meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? +dz 2(je) z .ms7cbda;z+scie 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 is in a magnetic field o x* 0g*shf r-(l0jxt;ix0xe saf 0.10 T. What minimum current in threxa;j 0f0(l *h -s*x0sixgxte rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field ouuk4/9yh od+ kf 0.20 T. What is the magni4y udo9+kk/h utude 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 with a spesf( tgir w)73gjg 930x km-wbxed 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 o*.;c a.jol /-hqmz1cd)fupv wf $5.0 \times 10^7 \; m/s$ 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 du57 : y:qv6qwylykvd8e3s .rmlz,l( ele 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 speed of3uzjshz1ziyt ud bg.5 (6*r-w $8.0 \times 10^6 \; m/s$ 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 speed of -gwkk2tkl77dz *j-zm :nh 7rm $8.0 \times 10^6 \; m/s$ 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 5cs wb*rhkb:3of $3.0 \times 10^6 \; m/s$ 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 of nnpu* m, (9+*us9me p :trflg.fbuw0vthe magne+t9fs*n 9bn vp:el.* (mp fg0rm,uuuwtic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the gt 8ey*ui;fd ,jround, 10 m away?j ti due8*fy;,

  How much current must flo/,1ahb37s-wmuuzy c yw 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 currento 6q0gi/q 0svy of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fqsio6 0/g0qvyield of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry current,g5vvd0lbp 5d s of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic fie ,b5 dvvg5pdl0ld 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 currentssu7+m((b v :sbl ikxa, of 20 A and 5.0 A in opposite directions. The wires are separated by 0.bl bm( :uxvass+ik (,720 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currenfbe --u5i2;gkb 8 vkn) ydyi1zts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At whauzydi81;k k fib be25-v)n-ygt point between the two wires are the contributions from the two wires the same?

  Four long parallel w ow)*6t y2dcddires each carry 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 6 w*2otddcdy)-y plane. What magnetic 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 ic7z /sw+7bw akn the opposite direction. The wires are separated by 0.30 m. Find the magnetic fwks/ cab77+wzorce per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire o x.i elf.5l dp)ycjka52e7g0if radius 4.0 cm when a current of 2.0ea70 epijd5kgl li)25xf .c. y A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magngs8;1z3bpy6xv ufb3qetic field is produced at 1;8sq3zy63 pb uvgfxbthe center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long 9)k 14s*ahck o nf-scptlnb(2and carries a current of 4.0 A. What str*) osn ltf skb4c-pk12ah9 (ncength of magnetic field will it have at its center?

  How much current must pass through a 400 .*ule6k ;ngk:ecx -bpturn coil 4.0 cm long to generate a 1.0-T magnetic fielek x .nklp:ug;c -*eb6d at the center?

  How many turns should a 10-co0b 422asf9 -xeosafg m 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 kf x/h9/ulvxk,qsk,6 loop of 120 turns that carries 6.0 A if its dx9x 6,s,h qkufvl/k/ kimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magne5qx;1ex0v gizq.62/m1rxl n j cd ei j9w4bb3dtic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the lmbxx; ew1 xi6jidzj/q.32nqvl 9 becr4 1gd 50oop is perpendicular to the magnetic field?

  A circular loop of wire of cross-section/tuhy3 tvp l 42tofsw4n,sbe+l y04-qal 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 mag;s /*pb-.1gkw4cba qrg1xm gonetic field of 3.5 T. The loop has an mkbo1;*4 cr. /pag1bw-sxqg g 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 0 no1rr65zv5f 6xztl rmagnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the 16z5f rzolx06r5trv nplane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnec ,8j:yf bmx:jtic 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 parallel to th 8:jx:fb yj,mce magnetic field?

  A circular wire loopfw/ewa4* z,l,sgaud duv ,;k, of 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 e) hafe;- p4 -oef9yla7 ntys 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 ioni6k2me,1/pnxzcg5 tc0* mxjn with 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 e)v(2dtfw( kma potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the pd(2 mef kv(w)troton's resulting orbit?

  A proton is acceleral(set*l nkv* lxawd. 4(w:)sdted from rest through 500 V. It enters a magnetic field of 0a el*lw*x(.dv )k( dssl nw4t:.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons io;x;- lutgb+ljjun*x 9 .ki n9s accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocitnkl oj9+; *9iuu xbngltj-;.xy selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?