貼片電感的(de)(de)感(gan)(gan)應(ying)有自(zi)感(gan)(gan)應(ying)和互(hu)感(gan)(gan)應(ying)兩(liang)種。由于附近另一個(ge)線圈(quan)中(zhong)的(de)(de)電(dian)流而(er)引起的(de)(de)線圈(quan)電(dian)感(gan)(gan)稱為互(hu)感(gan)(gan)。當時變(bian)電(dian)流在線圈(quan)中(zhong)流動(dong)時，會產生時變(bian)磁通，該變(bian)磁通將與該線圈(quan)本(ben)身鏈接，因此(ci)線圈(quan)本(ben)身會感(gan)(gan)應(ying)出電(dian)動(dong)勢。這種類型的(de)(de)感(gan)(gan)應(ying)稱為自(zi)感(gan)(gan)應(ying)。

正如我們已經(jing)說過的，當隨時(shi)間(jian)(jian)變(bian)(bian)化(hua)(hua)(hua)的電(dian)(dian)(dian)流(liu)在(zai)線(xian)圈中(zhong)流(liu)動時(shi)，它會產(chan)生隨時(shi)間(jian)(jian)變(bian)(bian)化(hua)(hua)(hua)的通(tong)量。這個(ge)(ge)(ge)隨時(shi)間(jian)(jian)變(bian)(bian)化(hua)(hua)(hua)的磁(ci)通(tong)可能(neng)與附(fu)近(jin)的另(ling)一個(ge)(ge)(ge)線(xian)圈鏈接。由于(yu)(yu)這種(zhong)(zhong)磁(ci)鏈，第(di)二個(ge)(ge)(ge)線(xian)圈中(zhong)將產(chan)生感(gan)(gan)(gan)應(ying)電(dian)(dian)(dian)動勢(shi)。這種(zhong)(zhong)類型(xing)的電(dian)(dian)(dian)感(gan)(gan)(gan)應(ying)稱(cheng)為(wei)互感(gan)(gan)(gan)應(ying)。因此，互感(gan)(gan)(gan)可以(yi)定義為(wei)一個(ge)(ge)(ge)線(xian)圈中(zhong)的電(dian)(dian)(dian)動勢(shi)感(gan)(gan)(gan)應(ying)，這是由于(yu)(yu)在(zai)任何其他附(fu)近(jin)線(xian)圈中(zhong)流(liu)動的電(dian)(dian)(dian)流(liu)隨時(shi)間(jian)(jian)變(bian)(bian)化(hua)(hua)(hua)而產(chan)生的。