If the north poles ofuf+(bpe17 ;+rcstx bm two bar magnets are brought close to each other, the magnes+b1 ;(c p7bum+erfxtts will

  If the south pole of one barw;:y-ta )wg5znm u)qg magnet is brought near the north pole of a second bar mag:gt u zyw)w;na mqg5)-net, the two magnets will

  If a bar magnet is divided into two equal pieo)khii82zaz k xe1dj4*e8y8gxshx ./ ,wdo5aces,

  The Earth's geographic North Pole is m4-p 5lwv( sp8iy1vvtm+ nk3b hagnetically a

  The south pole of a magnet points m gqz9y9mjc *dken cw3;-ia)5toward the Earth's

  An electric current pri:ms5; cmbk8zvue. )3gzvd:d+ k 4 uxeoduces

  Which of the following is cqtkn35bxlb); orrect?

  A vertical wire carries a current stc82rh0xbk qk9 raight down. To the east of this wire, the magnetic fieldkhx2k0 9qc8br points

  A horizontal wire carries a current stra lnugy w)k6n4*ight toward you. From your point of view, the magnku lw6 *yn)ng4etic field caused by this current

  A current carrying loop of wi 1hrx1p m0mle9xrw8-u re lies 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 magnetic field caused by this current, rxm9xm8e1plw0 h-1ruoutside the loop? The magnetic field

  A current carrying circular kplf 4nd546i8mlbaq8loop of wire lies flat on a table top. When viewed from abflm 5da6bi4 plq4n88 kove, the current moves around 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 magnet si*m v0eqdt/j0:eox q4n (oo2v-h:cdic field is the

  1 T is equivalent tom.*2vp3y k 4n)amfq cbl5t.x u

  The direction of the force on a currenxus-vj09/w h zt-carrying wire in a magnetic field is described by 9w-ux hszjv/ 0which of the following?

  The force on a current-carrying wire in a magnetic field is the s2o4 :s2g vssrutrongest when

  The force on a current-carrying wire in a magnetic field is equal t26zr ya4iaj h1vqrt09kn:a4 to zero when

  A vertical wire carries a current straight up in a region where the mag h1/24ytg vuys5fq4ewnetic field veh12/g4wve fsy4tq uy 5ctor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic mnmkvm+1*43rxh uvq.nd5+ l9iirmd* force. From this we can cod41 m5rmqlmu x*n9+ +rhii*3nvd km.vnclude that

  A charged particle mv* + nm8iy)wkioves 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 on this parm) yni+*ik8 vwticle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The map7hto,d0 ccw +gnetic force on this p hw o07c,cptd+article

  A charged particle is injected into a uniform magnes3znjk8,o( ,zh: zo r/b8quactic field such that its velocity vector is pzor83ncq ao:ks uj, 8zb(z /h,erpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform m,xc c5*e(( xv6fnqwo/bdm7xub x 4 b*pagnetic field. If the particle had been trqx nmde fc4 cb65bx(*v7bx( /w*xpu ,oaveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travelssii4t-mfna- ) in a circular path in a uniform magnetic field. Ifit--nasf)4mi instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves woh2cv0g +z4jzmi 86w eastward at speed V in a uniform magnetic field that is dirw+wm o2zv4 8hicz0gj6ected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cu5 qo.ijo+j *jrrve upward as the result of a magnetic field.riq.j oo*+jj5 The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniformkb.mz4c(ree 3(*tpqx k 1*zmx+nk p(m magnetic field in the +y direction. What is the direction of the magnetic force on the ele 1mnem+e(xzxp3kq4*.b*(k ( prktzmc ctron? (+x to right, +y up, and +z out of the page.)

  The magnetic field p dis-8 f0dmz+vroduced by a long straight current-carrying wire is

  At double the distance from a g 44g.hmgiwymx+i3f.u/kntlf5, l +y long current-carrying wire, the strength of the magnetic field produced by that wire decref ly m5nf 3,.yglumtgih.+wx+ikg/44 ases to

  Two long parallel wires placed side-by-side on7alr qvs q(,l*a(uc)p 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 a *s,aq( l(vclr pu)7qpoint exactly midway between the two wires

  Two long parallel wires placed sidk/qhm ha2(- kuf d)2zn0sira0e-by-side on a horizontal table carry identical current straigr(2)imz- h 2 q sakfdn/u00kahht toward you. 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 force )9ct3bo 1mzgibetween the wires is F. The current in each wire is now doubled. What is the magnitude of the new om3) c bzti91gforce between the two wires?

  A long straight wire carxvb1g v c qq36tau *2pnivwrg b1:45f2ries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force q v2:xgvrbwip41bq 2a f 6u31gvnc5*ton the proton?

  A wire lying in the plane of the page carries a current toward the bottb(c8b. ju(i86nudhlcom of the page. What is the di( h8nl(ucudc8i. bjb6rection 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 horizontal tabl. q1dx ax2 ajk+3j0jqpe. If the wires carry current in the same direct1.jj 2pxx0a+k3qda j qion,

  Two long parallel wiresuy,fdb(i0 : (ewu. kyi are placed side-by-side on a horizontal table. If the wires carry c:ib0ify du.k,(u ewy(urrent in opposite directions,

  Consider two currentyhh4so1lmu+r2 / 0msokd 0kc(-carrying circular loops. 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 the magnetic fie2ssc 1/lm0(m h o4y hu0odkr+kld 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 on aba- 9ymi18dne strand of wire and both bmnaay1-98di 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 betwe/7e/boke)pl )yola6u en the loop's magnetic moment and the magnetic fielk abo /)6leue yo)/pl7d vector is

  When placed askew in a magnetic v1 69+xvn)qxnhjgx -qfield, a current carrying loop that is free to rotate in any direction will experiev+g jx )q6n qv9xx-hn1nce a torque until its magnetic moment vector

  What fundamental fact underlies the operation vxthlsym)x h wx(m 0(,u;/+pmof essentially all electric motorsm)x (0uh/pxy ts m;(hx, vwm+l?

  A circular wire loop lies in a horizontal pla,i zrac n5pt1 /-0gorzne on a table and carries current in a ta r5ioc/ r1nzp0-zg,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 with the magnetic field?

  In a mass spectrometer a p1rok kt/v,,kj article of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is defjt k,,ok1/vk rlected 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 t )sgdxt j)) oqz2 )5cbs6l3ibohrough 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 directed to the north. What directiodb osgc5lso) )q)j z6bi3t) 2xn should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented pqk( 9sr 7b0d:-l dwhccarallel to a uniform magnetic field oksbr9dc(ch07d:q w -lf
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direccd 1 t.-gvmle;tion 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 w6qjl7d.. ro nphen it is placed in a magnetic 7dq njo.6p.rlfield 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 is in a magns17ib9jcg ; *ob dz4bn(c/mvjetic field of 0.10 T. What minimum curren ccj(94i*b/ob g;s b mn1z7vjdt in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetihvqz;*f+ b pv8c field of 0.20 T. What is the magnitude of the magnetic force on the prot v; q*8hvpbfz+on?

  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 spew-iw +7nyx5 w j3/eqrb sd(m*aed 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 speedoi2hg)9g j6 rorggok o 96g,a( 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 dueei+4t/s e,0 zp9a5h0 izvop de 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 fqbw7yk* qy12*8cl7 jfiff e1,t (sf sa 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 magnetic force of the electron.

  An electron moves with a speed x b6 y:v;*nedo : zeeht*h)7umof $8.0 \times 10^6 \; m/s$ 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 speedg/wdl nw56 jv4k k-u cwdth4/, 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 a current of 25 A. What8q+v :ntkbaeawac0/6 is the magnitude of the mak/w vt 6a:aab c+0neq8gnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatai.l+uxbkr e 5 z*b 5+gnac9/tes what magnetic field at the ground, 10 me9b +*kn a at5r iuxl/cb+g.z5 away?

  How much current must f/ ,0 eu29bn 0tyf*jfhnonhss,low for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a l* egz v3rqxit-0i 2v7n- k8ddjong straight wire carrying a current of 5.0 A is the magnitude of thexnz30* gk-vq-i82i7vd je dtr 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. The.yaz 1;nnm 9gly are separated by 40 cm. What is the magnetic field1n l.ygm 9n;za 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 currents of 20 A and 5.0 A in opposit;yzy* f63r1 l6p .shrh(gbosb )6pu ype directions. The wires zy b6 gs*l)o 1yp3uyph6h r;srp.fb 6(are separated 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 incs l5tzooa9 */:7rj ef opposite directions. The wires of ls5z:*otj/ a9 7creare separated 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 in the same dirnxqv mne, ;xqu4d0o- 4ection. They are parallel tmonx v4 equ4,nx ;d0-qo 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 to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the oppos e- hc;b-9*0vnzlh ygyite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between th0y zv-;cybh gln*9-hee two wires.

  What is the magnetic field at the center of a circular loop of wire of rad y/q eaeee(4+j( fy.cg3kbgd .ius 4.0 cm when a current of 2.0 A flows in the wir.dykbg/y. (e+f 4eeqjeg(c3ae?

  A solenoid 20 cm long is wound with hcw0v4te70y1a ;f69fueyfj l 5000 turns of wire. What magnetic field is produced at the center of the solenoid when aet00 fcv7;946al fu wfeh1y yj current of 10 A flows?

  A solenoid with 500 turns is 0.10 m log si 23sxne2h1n+msd 5 .v:dcsng and carries a current of 4.0 A. What strength ogsess2.:2n1 +hm d3xvcdi sn5f magnetic field will it have at its center?

  How much current must pass through a a 2l.hzl8jex ,l)8 jyiu-s8ij 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field ah. as ,ij-l2jy julex z88il)8t the center?

  How many turns should mj*c(f8se +jw0var v ,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 47/mdsuj )9 -jx(-njejmd 8lnuuj r0aloop of 120 turns that carries 6.0 A ifmnjuu/r8uj9l-e j san( j d0x-j)7d4m its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnuoai (t*4x eb8etic 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 isit(*8u4ea xob perpendicular to the magnetic field?

  A circular loop of wi06usk3kvk u h5re of cross-sectional 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 j edr9 5:(h doicwz1wv:u9bd(field of 3.5 T. The loop haoewwhjz:b(9i9 d r5(dcdv: u 1s 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 fieldrs 05;sszex-p 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 s 5s;z0r-epxsto the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unifyv)) z8y+tf;b ir7 aq/q8 vmtvorm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torvy/ yq8tv+; qz)ft78mavb i )rque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of j7z0fpfl 43c/ zza:oy.x d82o 3gkpkbarea $0.25 \; m^{2}$ 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 sin+imz+; /lvqu hgle-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 with liw6*mnzr- 7)bp*k 8)bt:rx xmvho :j 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 thr.lptj s3l;myv jm 8e,+ough a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is + .vyetp;,s 3mjl8l jmthe radius of the proton's resulting orbit?

  A proton is accelerated from rest through 50+s fb(v o1g7kgj tq/:b ru7uoie r,,n30 V. It enters a magnetic field of 0.30 T oriented perpendicular to its urqg j,bbgi7tv/1nuso7e,:fr (+o k3 direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differenp3;pt f iutln8bfc( d1xpi4- 6y4t.u mce of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is requireddy1 icu-484t.tff36pli p; nbp (t uxm if the particles are to be undeflected?