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第一章：電之基本概念

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(1)

第一章：電之基本概念

z

1-1：電之現象及成因

z

1-2：電之單位

(2)

Department of Mechanical Engineering Kun Shan University

■

1-1：電之現象及成因

(1/4)

¾

摩擦生電

¾

靜電序列

(3)

■

1-1：電之現象及成因

(4/4)

¾

價電子 ：最外層軌道的電子

¾

自由電子

¾

電荷：正電荷、負電荷

(4)

Department of Mechanical Engineering Kun Shan University

■ 1-2：電之單位

‹

1-2.1：電量

‹

1-2.2：電流

‹

1-2.3：電阻

‹

1-2.4：電壓

‹

1-2.5：電能與電功率

(5)

■

1-2.1：電量

(6)

Department of Mechanical Engineering Kun Shan University

■ 1-2.2：電流

(7)

★

例題 1-1

1-1：某導線上於10秒內通過1庫侖之電量，求其所流動

之電流。

(8)

Department of Mechanical Engineering Kun Shan University

■

1-2.3：電阻

(1/6)

(9)

■

1-2.3：電阻

(2/6)

表1-2

(10)

Department of Mechanical Engineering Kun Shan University

★

例題 1-2

(11)

■

1-2.3：電阻

(3/6)

(12)

Department of Mechanical Engineering Kun Shan University

■

1-2.3：電阻

(4/6)

(13)

★ 例題 1-3

(14)

Department of Mechanical Engineering Kun Shan University

■

1-2.3：電阻

(5/6)

(15)

■

1-2.3：電阻

(6/6)

(16)

Department of Mechanical Engineering Kun Shan University

★ 例題 1-4

1-4：某電阻器的色環顏色如下圖所示，則其電

阻值為多少？

(17)

■

1-2.3：電阻

(6/6)

¾可變式電阻器

接頭往下移時，電阻R

2

減小 接頭往上移時，電阻R

1

增大

(18)

Department of Mechanical Engineering Kun Shan University

■ 1-2.4：電壓

(19)

★ 例題 1-5

1-5：將5庫侖電荷由A點移至B點，需30焦耳的功，求A點 與B點之電位差。

(20)

Department of Mechanical Engineering Kun Shan University

■ 1-2.5： 電能與電功率 (1/2)

(21)

■ 1-2.5：電能與電功率 (2/2)

(22)

Department of Mechanical Engineering Kun Shan University

★ 例題 1-6

1-6：有一電池，其電動勢為1.2伏特，若其已輸送1庫侖電 荷量，則此電池作了多少功？

(23)

★ 例題 1-7

1-7：有一馬達輸出功率為5馬力，相當於電功率多少 瓦特？

(24)

Department of Mechanical Engineering Kun Shan University

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