1.a.c generator 的能量轉換係唔係由
magnetic force 轉 kinetic energy(mechanical energy) 再轉 electrical energy?
2.magnetic force 係咪因為有conductor cut 到changing magnetic field,
跟住有induced voltage,加埋complete circuit,所以有induced current.
induced current 就有induced magnetic field,induced magnetic field 比左個force?
咁講對嗎?
2006-11-17 19:31:10 · 1 個解答 · 發問者 2003 2 in 科學 ➔ 其他：科學
1, 是由外力 => kinetic energy => electrical energy => opposing magnetic force
2, 如果你所說的是conductor本身感受到magnetic force
那當conductor cut 到changing magnetic field
=> induced emf => because the close circuit, induced current
=> magnetic force
(由於conductor本身存在於magnetic field內,加上有current,以至產生magnetic force )
2006-11-22 18:29:30 補充：
外力是指使 generator 轉動的力
像用手"搞" 或用水流推動等
總之就係 supply a torque
2006-11-18 19:21:36 · answer #1 · answered by manuel 3 · 0⤊ 0⤋