If the north poles of two bar magnets are brought clos1n -roq 6:jlzh vq,2t xjgsgv,g9o26a e to each other, the magnets will62v:v x,h-g,jgnjs9z l1 6q2agot orq

  If the south pole of one bar magnet is brought near the nort +a5qqcj6x hed8t61qeh pole of a second ba6 xeqcqqdte5aj +6h1 8r magnet, the two magnets will

  If a bar magnet is divided into two equau;6(z+i.+vn lifmz oj l pieces,

  The Earth's geographic North Polh3o cf6ky t:6ve is magnetically a

  The south pole of a magnet po.s .yfpp+z d:b *hi3xiints toward the Earth's

  An electric current producr9k 5u84bcjthv n) m1id*3w bjes

  Which of the following is correct)yh i4 bynp05 2jp1dkh?

  A vertical wire carries a current straight down. To the east of this wire, th3;fj*ebseo6 2l 1xt h7 jxsj2ue l1u26jbs o ;27j f*tj h3exxesmagnetic field points

  A horizontal wire carries a current straight toward you. From your poi:; r7j, 8lewrb/r;klzkto z;pnt of view, the magnetic field caused by tr;lowkzrj;bz7/tl8ke :p ; ,rhis current

  A current carrying loop of wire lr-)w pxjd9 oubux-.+u ies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direct.ow b+) --ux9ru jdupxion of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on8*0 lym3dumnuo7gyd ) a table top. When viewed from abovenyduyg)* 0d3o87l mm u, 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 magnetic field is d )leg/y:k *q/1q 0h)ffsftmrthe

  1 T is equivalent tov.np xtl1xbb kf2ay x5 +eyv3y347 ;zl

  The direction of the force on a current-carrying wire in a magnethv3vk.*z ++m r p,*edx,ngmumic field is descrixv+*3vn z* m.m,m hrke gu,+pdbed by which of the following?

  The force on a curren-0zrt :hoq:axd w 1r dxor5f::t-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal8o;crodgmso:x bce*d 40k2o) to zero when

  A vertical wire carries a current straight up in a region where thwlwbi pd6) ;b h:s5a,se magnetic field vector points due north.sb) ;hbw,sa pl6d i:5w What is the direction of the resulting force on this current?

  A charged particle moves and experiences n7(:eh7tfo+bhx:s u v oo magnetic force. From this we can conclude t+:(o bx77hhfs e u:vtohat

  A charged particle moves with a constant speed throughuo8(8q8a hx1.wp5atc .aj1hjmywd b , a region where a uniform magnetic fi .t y51 jdxapa88ho, qbmhjw18cw(.uaeld is present. 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 across a constant magnetic field. The magnetic force +2i/ia kbcgw6n, r-kuon this p-2+ k riwi/abgnk 6cu,article

  A charged particle is injected inbx es5u i 23)okpzlh*0to a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the part)0*3hzu2 lkoe5bis px icle will

  A charged particle is observed traveling in a circula v7uceqddj 9+ps:qjcz7on+ y9 q,o89wr path in a uniform magnetic field. If the particle had been traveling twice as fast, 9qvw:+jj8 on7peouz7 yqscdcq9,d9+ the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a un(ib ovb- j1fju .a+;seiform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path woul;j iafeus+jb(o-b1v. d have been

  At a particular instant, an electron moves eastward at speed V in a 7 pzi77 od001zo o+ 9nfnji+rvsmv.v qh5dw, kuniform magnetic field that is directed straight downward. The magnetic fo ,nzsfhr+vovojqn + zk ip0.77dw9 71vio d50mrce that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwa7q; idu sd(ks9rd as the result of a magnetic field. The direction of qdsud7(is k;9 the magnetic field is

  An electron moving along the pkxk.: oua(e2ov1gon ;;1zor +x axis enters a region where there is a uniform magnetic field in the +y direction. Wgx1oa ;v.knoekur( oop:;21zhat is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carryi;0syz9kjca,6 tj o k*eng wire is

  At double the distance from a long current-carrying wiv5ew/td, td3:.jl i 2ekk(ofnre, the strength of the magnetic field produced by that wire .(2nkd:5okij,3e t etv df w/ldecreases to

  Two long parallel wires plaz 65vns): .vzvr hn,/a7mby auced side-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 point exactly midway between thav 6hm:vzzy vn5r.,aub)s/ 7ne two wires

  Two long parallel wires placed side-by-side on a horizontal;a b; 9dih:cu h2/nbak table carry identical current straiab;/ khdh2u:;ia9b nc ght toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal cu fj4 *f+t6tl1nk y 0zam.r;jagrrents. The magnitude of the force between the wires is F. The current in each wire61tm0rj;f yj*a azlfk4 gnt+. is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towardqa-q9 17zn ow.tslno0 the east. A proton moves toward the east qat7z 91qonsw-o0 ln.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 toward the bofef uen t4)65m 1*zthottom of the page. What is the direction of the magnetic force it produces on an electron that is moviu* 5zf61tnoh )4etefm ng 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 table. If th4cf lhg9bcm(z,je +6 ce wires carry current in the same directio6 f(c9jlhc +, zgcbm4en,

  Two long parallel wires are placed side-by-side on a horizontal table. If the q5h la. q-.ry4pj ne/twires carry current in /.jphqal.-5 y4ertq n opposite directions,

  Consider two current-carrying circular loops. Both are made fy u 4zzzxv3 636)inszk5hoky, rom one strand of wire and both carry the same current, but onoz5ixyks 46y)zn 6,u3hz3vkze 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 a)f:aqq 9rura3re 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 moment) r :qar9au3qf of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current dhu7 x tw6/4la95l wogcarrying loop occurs when the angle between the loop's magnetic moment and the magnetxt 7 ww4o5aldug/l6h 9ic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free t)k8 ha9uwi*gko rotate in any direc9h)a iw 8guk*ktion will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric m wswb4eun(hlvp0 /e**otorsnuv/hsw 0(w*p*eb 4e l?

  A circular wire loop l77der) k8e(shruu qp)ies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magneticuk8 uphr7s ))d(q7ere 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 particle of mass m and charge q is accelerated p3f)edxvla 13 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 3f el31d)pxv afield 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 chargy r2m pf7m 3(q9curew)ed particle passing through crossed electric and magnetic fields. The force(3uwf27r )eq9ym pcmrs 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 point?

  A 2.0-m wire carrying a current of 0.60 A is8u 6)u *kjml3o(gva. brlx pv( oriented parallel to a uniform magnetic field of3.x)uvblj auropm( v (*lg68 k
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a naepzl1if 155 uvfwd0 l4nrj 4vw+).u 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 carryin31d duy3ishq+-5z( p3vd lbzog 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an an15i3zvhz-ul 3q dod3( spb yd+gle 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 fieixizx )d hqvo81 o7 u8*xy 93f2sk;jvduqp ;b8ld of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the xs x28i 9u8q pj*v8fzd13hb xodv;ok i7) yuq;rod?

  A stationary proton is in a uniform magnetic 09rlvo6qw 6qe7 3fz6qxo o+eifield of 0.20 T. What is the magnitude of the magnetic force on v973 xrqe lo6+fo6oqz e6wiq0the 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 aj t7 c/k9b6 mu70elyjy speed 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 pv108 vrcmbdo7 kwha ,xv4e:-*4 snjca speed 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 nort58eppevh zcxymc; 1pz-7-4l i h 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 of ;p.to68 (w0v( x+l wtngmuvqp$8.0 \times 10^6 \; m/s$ 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 skbiv7;iswas0 7 wt+eyt0 x8sc8kyq t0vh1* 1qpeed 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 u t7r+ 1iot:tpuwa9l0 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 )e:tmu5cfse0 ns c1o7. What is the magnitude of the magnetic field at a distance of 0.15 mucnfo5e ts7m10sc )e: from the wire?

  A high power line carrying 1000 A generates what magnqzkb5;* trga4ve.)orz w 53my etic field at the ground, 10 m away?ytm4ezbw5o.g5rv 3*kaq ;z r)

  How much current must flow forsv *24wqw ,yz;4a m x d59*snjpywcig4 $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long .4kqbgpgsq tsu6.x-36r*;r iutc7p hstraight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire eq6kbrqsgsg x-;i c4u3 p.pr6u.7*thtq ual to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires c+vn*ka 47 qz afcum+18c5a rgzarry currents of 10 A in opposite directions. 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 zc4fc1rgk+7amq nv8aa+ z 5*uwire and 60 cm from the other?

  Two long parallel wires carry 5dlhh. p);gyycurrents of 20 A and 5.0 A in opposite directions. The wires are s.) yyhpdl5g;heparated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry current(5 vxgm)a( yhls of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions fromxay() m5(l vgh the two wires the same?

  Four long parallel wires each carr740 gic5wl kbiy 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 c57c ki 4g0bwlim positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wire/91 +qr4c *xnonk7pmba :fgzxs carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires / orqanfmz9x1+cpkb ngx7: *4.

  What is the magnetic field at the center of a circular loop of wif m:9i,.9fns3nws twg*mi b ,mre of radius 4.0 cm when a cf 9 w g.9m3tfsm:i m*,wbsn,niurrent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. q0-wfcm4o(uq k4u gj 3 What magnetic field is produced at the center of the solenoid when a current o c3 (w q44f0mjugkoq-uf 10 A flows?

  A solenoid with 500 turns is 0.10 m loc2a5n1xvoygi 6 /4xdx ng and carries a current of 4.0 A. What strength of magnetic field will it ho xx iga/n641xcvyd25ave at its center?

  How much current must pass throughlcih- g3 o4m9c a 400 turn coil 4.0 cm long to generate a 1.0 ioh3g4c-9 mlc-T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to genh2aleh3)u* i yf h6av z7uzy93erate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a ryd. zpbxpx /a4 (pe7-tectangular loop of 120 turns that carries 6.0 A if its dimensions are 7xztxybp.p(/ -pa4 de 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0z8txoe- r(;awtlh 1zs i2f a-;.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque wh 81a fizw-alxthe -o2r;st z(;en the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wivqp,v* ;mvg) ire 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 magp9xz ad,q3s+gnetic field of 3.5 T. The loop has an arex+ p3, gzqd9saa 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 u iswnicv :1(h;niform magnetic field of 0.30 T. The current in the i;(vnc1sh: wiloop 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 radius 0.50 m is in a uniform maudsskj 0ia 4 xm9t18s8gnetic field of 0.30 T. The current in the lot mxkisj sua8418 9d0sop 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 o+ c8t8gyitce t10 x+b1ikz-i-tlbam0f 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) has a speed m psik( c8-ztf+lll;8d2hqm5of $1.0 \times 10^6 \; m/s$ 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 .cxehy2 60us ep6(zex 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 potentialrk-i v gg, 1)oy+ yh;a;sjqkr+ of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the rasrh j rg1ga,vi+o- ky;)+q yk;dius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of9pi7ox a.*ipl 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the l.apx iip 7o*9path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV d jq9l1srmd55;w -x0 mtz5t50hzkx qs before entering a velocity selector. If the B-field of the velomx 55; qms5zz1k 5th09dtx-s0 lr dwjqcity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?