... =.lS = 1 ,7. 10-8. = 17( ) in tr ca dõy (Rd) l 17( )VỡR1//R2R1,2 =360 ().Coi Rd nt (R1//R2) RMN = R1,2 + RdRMN = 360 + 17 = 377 Vy in tr on mch MN bng 377 .b, Cng dũng in trong ... bin i in nng thnh nhit nng v c nng: Mỏy khoan, mỏy bm nc,qut in, 2.Ton b in nng bin i thnh nhit nng :a,Ba dng c in N bin i hon ton thnh nhit nng: m hn,ni cm in , bp in, b,Dõy hp kim nikờlin ... thnh cõu C7, C8 vo v.- Cỏ nhõn hc sinh hon thnh cõu C7, C8 vo v.-Hng dn HS tho lun chung cõu C7, C8.I .in nng.1.Dũng in cú mang nng lng.C1: Hỡnh 13.1 sgk : Dũng in cú kh nng thc hin cụng...