If the north poles of two bar magnets are brought close to each other, the magn:em;bx l *d*hy/ur) wvets wiw*rule )v;y/d*b m:hx ll

  If the south pole of one bar magnet il.q 5v3b /:a*u: tnrn-fv mfwvs brought near the north pole of a second bar magbq.a m *f:5f-/3rluwtvn:vvn net, the two magnets will

  If a bar magnet is divided 4t*dtli. t bx4into two equal pieces,

  The Earth's geographic North re3jqeuq 81*9mj, vdeuv 9ehl ja1l.7Pole is magnetically a

  The south pole of a magnet points towar (,17v4ky7m4uxigpq b gk gg2vd the Earth's

  An electric current produces f 1noqzz*ez*p10fs4zvt s;*j

  Which of the following is correcttxt0c6t9un o -?

  A vertical wire carries a current straigbt bj*/;4uk xnb63s mkqvn 6*7+ipgjzht down. To the east of this wire, the mag x4m7 *ng3v 6k6 /+q;tk *jinbujbbpsznetic field points

  A horizontal wire carries a current straight toward you. From your point of vibgdq1tw1ec :p 5l -4beew, the magnetic field caused by thib1:t5db1w4qc - gelp es current

  A current carrying loop of wire lies flat on a table top. When viewed from abolfr/qy/llp35g)pr*wn b ax-j hwh +.2 ve, the current moves around the loop in a counterclockwise senjh/b)wq -p5lp*lgrwy 3l ax.r f+2n/ hse. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. (fm)tnerrrg+)b :t7yvb (s p1When 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 the loop? s : y7)e1nbrmb()( t t+gpfvrrThe magnetic field

  The SI unit of magnetih d6sih rr.pv)+l1,i yc field is the

  1 T is equivalent toms+kyp;9o l r+ ;6drcb

  The direction of the foroi,8xk.nt vjm7 *fm )t pmw9z-ce on a current-carrying wire in a magnetic field is described by which jz.tw7pmot ,89x)*in vm f-kmof the following?

  The force on a current-carrying wire in a magnqs x4e5:y8x:0n4wi ziycxv r3etic field is the strongest when

  The force on a current-carrying wire in a magnetic fhf3k:0.gl0rigyb4k g23 xi jy ield is equal to zero when

  A vertical wire carries a current f(j6n oa, l3za-3y6 tn,oxzgw z *hth4straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on h lh(3nztaf3zxyt,ozajwg-,o 6 6*4 n this current?

  A charged particle moveszjw6,m: u 0,j0al qp, 5dtzgdki c9:mx and experiences no magnetic force. From this we can conclude:xjz9tk,q c0l,z i5g6 0ud:,pm jwmda that

  A charged particle moves with a constant speed through a region wf4zui6fe 7k d*here a uniform magnetic field is present. If * if46dfe7ukz 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 magne2 gpl fo/je7rj-)nesr(* drg5 tic force on tj(grg7/)e5flp-eo r2*d srj nhis particle

  A charged particle isozuxf u yx63nuk)lfrte0b*.9 ks+ ,7x injected into a uniform magnetic field such that its velocity vector is penx 0t,f+6u*ruxk lxubezo) . 7 kf93ysrpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is obo0 phd-dfz/1 5w*c wpimw 98exserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as f8pdwdw p*c/0xo5wf 19emizh - ast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnugk3et.. z7:r1h itg jetic field. If instead the particle carried a charge of +2e, the radius of.k1g37u.:jhti ret zg the circular path would have been

  At a particular instant, an electron moves eastwa4 q5t+cd g)fzurd at speed V in a uniform magnetic field that is directed straight downward. cztdq+) f5g u4The magnetic force that acts on it is

  An electron has an initial velocit0 kzd 8m loa5pgy1k)e+y to the south but is observed to curve upward as the result of a magnetic field. The kg1yz5 m)8d0+leoka pdirection of the magnetic field is

  An electron moving along the +x axis enters a region where there is q5,7m otxp jn c;:tuqamn o6;+a uniform magnetic field in the +y direction. What is the direuqxnmco ,o ;pt75t am;j6:n+qction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field prodf(1g bxxtnrwfo cthk gjx, 7-by*1705uced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the mg n yjhr(;1ww109j yohagnetic field produced by thang o11wj0(;r wy9hhjy t wire decreases to

  Two long parallel wires placed side-by-side ony jn)7mipd8hz+ta5s4bk /y,n 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 a d b7p)ksnn+z5 yy tim4/8h,jaway from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identicff wkl3 3h-6eyal current straight toward you. From your point of view, the magnetic field at the point exactly betwe63-hklwyf e3 fen the two wires

  Two long parallel wires carry equal currents. The magnitude of the force g89mcz4s hcm 2between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wiresscczhm94m 8g2 ?

  A long straight wire carries current toward the east. A proton moves toward wf3hzzifo,-1) stk l 9the east alo sof19ziw f ,t)zk-hl3ngside 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 bottom o .r*e7cu1.1 hqmlpz pbf the page. Whz.. uhm11 b7*qlpecr pat is the direction 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 arev1qz6u 0(sow w placed side-by-side on a horizontal table. If the wires carry current0(wuwzv qos 61 in the same direction,

  Two long parallel wires are placed side-by-sideanl2w8;mto2 5qn+ y bkjd0 )t+cgqm8q on a horizontal table. If the wires ca2 a2ntyc qq;+ t88nwbmdgjkql50)o + mrry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one stran1sr ivwmg krjo ipl4,+9a) -h-yk)n1yd of wire and both carry the same current, but one has tw-jwvr14,-hik)9agm ok)yy1 snp +i r lice 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 are made from one s4a /2 6;pluy -yq2vt(vrv u i0 35ozjstjboaz2trand of wire and both carry the-b olj2y u uijaqav ;302t (tzov/zr2vp65s 4y 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 thet-b nb9l91a6ao n*w)kh n gxfku.78v b angle between the loop's magnetic moment and the magnetic field vectorg968*wbnh1f na)vu- okb9n bx7k l.at is

  When placed askew in a magnetic field, a current carrying loop that is :dj7f.o0i t;lap 7xaw l,ns;x +y.smlfree to rotate in any direction will experience a torquw;lsinxtm:ja x ;. .7lafp0+o ydl7s,e until its magnetic moment vector

  What fundamental fact underlies the operation of es 7aou:k bob+550*gwqs7bs+ j h jk(dkesentially all electric motors+j:kb(ke5sw5 u*sd ob7ajkoq+7hg b0?

  A circular wire loop lies in a horizonf: ip4mqxy )0k1xb ou.tal 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 horu4)qb :.k1i y0p mfxxoizontal. 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 soi8-( lrl hn7mass 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 the particle. Derive an expression for the mass of the particle in te7ro h8li s-ln(rms of B, q, V, and R.

  A velocity selector consists of a charged part)rje4-r.unz5 ;pzxki icle 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 selri) zzp5.jur;n- 4ekxector, 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 is oriented paralli.5( jc nxfss1xn/4xgel to a uniform magn gn1xs4j. /fsxc(i5nx etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directioo n4 (mbkd*jy5n 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 carra n r7(q.kh(itojxmu-r5;u8 hying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an xui r(5t8h;nr 7ok(jmh u.-aqangle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kgzuo s+4nmf94 i and is in a magnetic field of 0.10 T. What minimum current in the rod is ne4mufoin+zs4 9eded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fic/ ovav+6)z2ghy w q1ield of 0.20 T. What is the magnitude of the2)ichvqga1z y6vo+/w 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 s*sr-za cu(pl3pzw97n 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 speed ofsn: 0f;iplbe mjsr665 $5.0 \times 10^7 \; m/s$ 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 nouufl)qv8g -k 3s.ob*y- (fvdirth 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 speedae+0w *ysj )af 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 sp4n,)5gm p mkeoeed 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 speed2gsy 54qdgnk8) kxwmu.)*p rn 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 :f7k t-8y4be28h fo3ssi yilq25 A. What is the magnitude of the magnetic field at a distaif 8 sb lq 8fyt2os3ehy:7-ik4nce of 0.15 m from the wire?

  A high power line carrying 1000 A generates what :m;6chgac5 sf ik;y4;-djeifu6v+ifmagnetic field at the ground, 10 m 4 d -fiig+esmc;c5uik;;av fj6y 6hf: away?

  How much current must flow forq*:zao) aada j52y;l t $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wirbkik9 j97f pgyt/ lvbr8n78d 8e carrying 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 magnetic field ofyb9/r7tiljng88f 7vbd8 k k 9p about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10a(0na ch--68hkxt qzd A in opposite directions. They are separated by 40 cm. What is the magnetic field in the pxt08k-d aq6 (c z-nahhlane 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 3q-5w tzg h*uyuyg dmzb22 k 0jre-80copposite directions. The wires are separated by 0.20 m. t-c*qh0urmwj 2zuekygydb80-235 gz What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposip2m,c 2 xrs:rbte directions. The wires are separated by b r :x,mp22rcs0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carryo o-cn,j6+q p+8 h nxyut*w*jm 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 w*+x8 6+cmjoyh q un-,pjt*nox-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 opposj0 ez*;smt3zmite direction. The wires are separated by 03m;0z t emsj*z.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a cit,m-cb ox,8lvrcular loop of wire of radius 4.0 cm when a current of 8 -,x,mbvclo t2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic(ksp5zc :ly8c ( l2nlm field is produced at the center of the solenoid when a current of 10 A flc n ll2c5p yksz:m8((lows?

  A solenoid with 500 turns is 0.10 m long andqqngv.4 sdr 4h(yve 6, carries a current of 4.0 A. What strength of magnetic field will it have at itq q y4vnd hvg.46rs,(es center?

  How much current must pass through a 4/k; wjk vhn(*bq5ea1ws4qy p2; ay mg100 turn coil 4.0 cm long to generate a 1.0-T magnetic field a*wqgjp;b/yk ea yq15an1;4k(hvwm 2s t the center?

  How many turns should a 10-cm long solenoid have if it is to g+fk*a t,iho6qq* u,h3hlo fs:enerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a recgl. u-/s /wehi(igfn) tangular loop of 120 turns that carries 6.0 A ew(s -)hul//.gi fginif its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic 5i.; * 6kliveh iq+yfhfield 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 perpendicular to the magnetic fiey6h5 * ;fiiq+kieh.vlld?

  A circular loop of wire of cross-sectio x.:gfqw n4.pfnal 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 yo74dmp5 oxye 4q*cu2 .z/mruof 2.0 A is in a magnetic field of 3.5 T. The loopd2poocr7uq .z4mu* xm54yye / has 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 r-dtbz jd3 .c2 yk:ts*padius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magneticdt k*j: .sytz-32bp dc torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0qcf6wy0u-g rc zh0804duitm 0 .50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What i 4z8u0mc 0-6cqi tdrfywh00 gus the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop oufpy wywzk w:;0t24ev4)is f9f 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 singl . x.)+d4; s1shb hx yhl;cxo7lvm5ebeilm8l:e-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 velocity wjp0 suze5d6ug. 3b-e:pek8 h$6.9 \times 10^6 \; m/s$ 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*xvc6;qcm +rf moves into a magnetic field of 0.040 T. What is the rf c;6cr+xmq *vadius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic9z;.mrvtf uwilxz03dp 7v u , om*+-ep field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path w ,od0vemvz- zr.fl+pxup* 3tu7m; i9it follows.

  A beam of electrons is acceleratk(uo ;xn/u7 sfed through a potential difference of 10 kV before; ksuf u(/7nxo 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 required if the particles are to be undeflected?