AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr 1 Complt t p ll: Mnt or s typ o or n t s stronst t t o t mnt. Tr r two typs o mnt pol: n. Wrt wt woul ppn twn t pols n o t mnt ntrtons low: Drw t mnt l lns on t r mnt low. Rmmr lns lwys strt t t n pont towrs t. Expln ow plottn ompss oul us to nvstt t mnt l roun mnt. You r vn t ollown quton n your xm: or = mnt lux nsty urrnt lnt A wr wt urrnt o 4.0A s pl twn two r mnts ( s wt o 12mm) n stt o ttrton. T mnt lux nsty s 0.2T. Clult t or tn on t wr. In w rton o ompss nls lwys ln? Wy? Not: n otr lultons, you my rqur to rrrn t ormul. Lst our mnt mtrls: Dn t trm mnt l : Stt t tor tt ts t strnt o t mnt l: 3. 4. Dsr t rn twn prmnnt mnt n n nu mnt. W o ts mnts wll xrt stronr or on mnt mtrl? A. B. l Wn urrnt lows trou onutn wr, mnt l s prou roun t wr. Stt two tors t strnt o t mnt l pns on: Expln your nswr.
AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr 2 A lon, strt onutn wr s pl vrtlly so tt t psss trou orzontl p o or. Dsr ow you woul us t p o qupmnt prvously stt to nvstt t mnt l you v rwn. How n you n t nort pol o solno? Wt s t motor t? Iron lns r sprnl onto t or. Drw t pttrn ty woul orm: Stt tr wys you n nrs t or: Wt s solno? Lst our wys n w you n m t mnt l roun solno/ ltromnt stronr: 3. Stt t p o qupmnt you oul us to nvstt t mnt l you v rwn ov. Drw t mnt l pttrn roun solno low: 3. How n you rvrs t rton o t or? l Stt t mto tt norms you o t rton o t urrnt n strt wr. 4. A motor s mnt lux nsty o 5T n urrnt o 8A. m Wt o your tum n nrs rprsnt n ts mto? tum: nrs: Dsr wt ppns to t mnt l roun strt wr wn t urrnt s rvrs. T totl lnt o t wr s 500m. Clult t or on t wr usn t quton F = BIL. Wt s ts pttrn smlr to?
AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr 3 You r vn t ollown quton n your xm. or = mnt lux nsty urrnt lnt Complt t tl: How n t rton o motor rvrs? Dsr ow you woul us n ron nl, lnt o nsult wr n ll to m n ltromnt tt n us to p up som stl ppr lps. Symol Prt o t Equton Wt It Rprsnts Unts How n t sp o motor nrs? or B Wt rul n us to n t rton o t or? Wy wll motor not wor wtout ommuttor? Wt nl o your tum, rst n son nr A n to t? Wt os prt rprsnt? L tum: rst nr: Dsr smpl ltr motor. son nr: Wt s t ss o n ltr motor?
AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr Answrs 1 Complt t p ll: Mnt or s typ o non-ontt or n t s stronst t t pols o t mnt. Tr r two typs o mnt pol: nort pol n sout pol. Wrt wt woul ppn twn t pols n o t mnt ntrtons low: Drw t mnt l lns on t r mnt low. Rmmr lns lwys strt t t nort pol n pont towrs t sout pol. Expln ow plottn ompss oul us to nvstt t mnt l roun mnt. Pl t mnt on ln p o ppr. Pl t plottn ompss t on n/ov t pol o t mnt. Mr on t ppr wr t pont o t nl ponts. Mov t ompss to t pl you v ust mr. Rpt untl you v mov to t otr pol o t mnt. Rpt on t otr lnt o t mnt (.. top n tn ottom). You r vn t ollown quton n your xm: or = mnt lux nsty urrnt lnt A wr wt urrnt o 4.0A s pl twn two r mnts ( s wt o 12mm) n stt o ttrton. T mnt lux nsty s 0.2T. Clult t or tn on t wr. rpulson ttrton Lst our mnt mtrls: ron stl In w rton o ompss nls lwys ln? Wy? Mnt nort, us t rt s mnt l. Ts s possly u to t ron ontnt n t or. Not: n otr lultons, you my rqur to rrrn t ormul. onvrt 12mm nto mtrs = 0.012m pl vlus nto quton: or = 0.2T 4.0A 0.012m or = 0.0096N (nwtons) Dn t trm mnt l : T ron roun mnt wr or ts on notr mnt or on mnt mtrl. Stt t tor tt ts t strnt o t mnt l: rpulson T strnt o t mnt l pns on t stn rom t mnt. 3. nl 4. olt Dsr t rn twn prmnnt mnt n n nu mnt. Prmnnt mnts prou tr own mnt l. Inu mnts om mnt wn pl n mnt l. Howvr, wn rmov rom t mnt l, n nu mnt loss most/ll o ts mntsm quly. W o ts mnts wll xrt stronr or on mnt mtrl? B A. B. Expln your nswr. B s mor lns o mnt lux. Wn urrnt lows trou onutn wr, mnt l s prou roun t wr. Stt two tors t strnt o t mnt l pns on: sz o t urrnt stn rom t wr
AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr Answrs 2 A lon, strt onutn wr s pl vrtlly so tt t psss trou orzontl p o or. Iron lns r sprnl onto t or. Drw t pttrn ty woul orm: Dsr ow you woul us t p o qupmnt prvously stt to nvstt t mnt l you v rwn. Pl mnt ompss t on pont lon t wr. Turn t powr supply on n o. Mov t mnt ompss urtr lon t wr. An, turn t powr supply on n o. Mov t ompss urtr wy rom t wr to s tt t mnt l s wr. How n you n t nort pol o solno? Usn t rt-n rp mto. Hol t solno wt your rt n n nrs pontn n t rton t urrnt s lown. Your tum soul pont to t nort pol. Wt s t motor t? I onutor rryn urrnt s pl n mnt l, t mnt proun t l n t onutor xrt or on otr. Stt tr wys you n nrs t or: Inrsn t sz o t urrnt. Inrsn t lnt o t onutor n t Stt t p o qupmnt you oul us to nvstt t mnt l you v rwn ov. plottn ompss Wt s solno? A solno s orm wn lon p o onutn (n nsult) wr s loop nto ol ylnr. Drw t mnt l pttrn roun solno low: Lst our wys n w you n m t mnt l roun solno/ ltromnt stronr: Us lrr urrnt. Us n ron or. 3. A mor turns to t wr. 4. Pl t turns o t wr losr totr. mnt l. 3. Inrsn t lux nsty. How n you rvrs t rton o t or? By rvrsn t rton o t urrnt or rvrsn t rton o t mnt l. l Stt t mto tt norms you o t rton o t urrnt n strt wr. Rt-n rp mto/rul. A motor s mnt lux nsty o 5T n urrnt o 8A. m Wt o your tum n nrs rprsnt n ts mto? tum: T rton o t urrnt. nrs: T rton t l lns soul rwn. Wt s ts pttrn smlr to? Dsr wt ppns to t mnt l roun strt wr wn t urrnt s rvrs. T mnt l s lso rvrs. T totl lnt o t wr s 500m. Clult t or on t wr usn t quton F = BIL. onvrt m nto mtrs = 5m pl vlus nto quton: or = 5T 8.0A 5m T mnt l roun r mnt. or = 60N (nwtons)
AQA Trloy Unt 6.7 Mntsm n Eltromntsm - Hr 3 You r vn t ollown quton n your xm. or = mnt lux nsty urrnt lnt Complt t tl: Symol Prt o t Equton Wt It Rprsnts Unts F or N How n t rton o motor rvrs? By rvrsn t rton o t urrnt or rvrsn t rton o t mnt l. How n t sp o motor nrs? By nrsn t sz o t urrnt or nrsn t mnt l/us lrr mnt. Dsr ow you woul us n ron nl, lnt o nsult wr n ll to m n ltromnt tt n us to p up som stl ppr lps. Wrp t wr roun t ron nl. Connt t wr to t powr supply (wt onntn ls n rool lps). Swt on t powr supply. Us -mnts ppr lps. Suspn t nl nr t pprlps n ror ow mny ollt. T mor pprlps suspn, t stronr t ltromnt s. Cn t numr o turns (on t ol). Cn t urrnt (trou t ol). B mnt lux nsty I urrnt A L Lnt o t wr wtn t l. Wt s t ss o n ltr motor? A ol o wr rryn urrnt n mnt l tns to rott. T m Wt rul n us to n t rton o t or? Flmn s lt-n rul Wt nl o your tum, rst n son nr n to t? 90 Wt os prt rprsnt? tum: movmnt rst nr: l son nr: urrnt Wy wll motor not wor wtout ommuttor? T ommuttor nsurs tt t urrnt stys n t sm rton. Also t ol woul not r to spn. Ts mns t ol woul rmn stll n not rott. Dsr smpl ltr motor. A ol o wr s x (on n xl). T ns o t wr r onnt v splt-rn ommuttor. To ttry/powr supply. T ron rus ontts t t ommuttor nsurs t urrnt rton n t ol s lwys t sm. T ol s pl twn two (lt) mnts. Wt oppost pols n otr. T ol rotts ontnuously n ts s t ss o n ltr motor.