Molecules and Solids (id: b581fa721)

本题目来源于试卷: Molecules and Solids，类别为 IB物理学

[问答题]
A transistor can amplify an electronic signal,:x9ngqpm5 9+pqh xovz p,o7a0 mekm/r: cw6/ a.e dmye/xaning it can increase the power of an input signal. Where does it yx / /c wke:ma.6/dermget the energy to increase the power?

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