A .將細(xì)銅絲拉直,用刻度尺測(cè)出細(xì)銅絲的長(zhǎng)度L1;
B .用刻度尺測(cè)出鉛筆桿上銅絲繞圈總長(zhǎng)度L2;
C .用銅絲的長(zhǎng)度除以銅絲的圈數(shù),即得細(xì)銅絲的直徑d;
D .將細(xì)銅絲緊密纏繞在鉛筆桿上;
E .?dāng)?shù)出纏繞在鉛筆桿上細(xì)銅絲的圈n.
A.將細(xì)銅絲拉直,用刻度尺測(cè)出細(xì)銅絲的長(zhǎng)度l1; |
B.用刻度尺測(cè)出鉛筆桿上銅絲繞圈總長(zhǎng)度l2; |
C.用銅絲的長(zhǎng)度除以銅絲的圈數(shù),即得細(xì)銅絲的直徑d; |
D.將細(xì)銅絲緊密纏繞在鉛筆桿上; |
E.?dāng)?shù)出纏繞在鉛筆桿上細(xì)銅絲的圈數(shù)n.