可調光暗小燈(電阻原理)

SKU: K211
$35.00
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SKU: K211 Category:

配件:燈泡、螺絲、電池盒、燈座、導綫、可調電阻、螺孔板。

描述

原理:改變接入電路中的可調電阻的圈數,從而改變電路中的電阻.

滑動變阻器的原理:

靠改變接入電路的電阻線的長度來改變電阻。

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