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有一个平绕于圆筒上的螺旋线圈,长10 cm,直径1 cm,共有线圈1 000匝,用32号漆包线绕制,漆包线的电阻是247Ω/km(20℃).若把这线圈接在电动势为2 V的蓄电池上,问: (1)线圈的自感和电阻各是多少?电路和时间常数是多少? (2)线圈中通电开始时的电流增长率是多少? (3)线圈中的电流达到稳定后,恒定电流是多少? (4)在稳定后线圈中所储存的磁能及磁能密度各是多少?
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