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--- cert_exam:tech_radio_op_1:basic:201501:a-1 [2019/11/21 01:43] – ↷ basic_201901:a-1 から cert_exam:tech_radio_op_1:basic:201501:a-1 へページを移動しました。 fu
+++ cert_exam:tech_radio_op_1:basic:201501:a-1 [2026/11/15 10:44] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-年無線工学の基礎
-==== A-1 =====
-直線電流による磁界の強さ
-$$ H = \frac{I}{2 \pi r}$$
-H:磁界の強さ[A/m] ,
-I:電流[A] ,
-r:電線からの距離[m]
-円形コイルの中心の次回の強さ
-$$ H = \frac{I}{2 r}$$
-r:コイルの半径[m]