22 - 22 22-1 1820 19 Hans Christian Oersted Michael Faraday...

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22장. 전하 22-1 전자기학 역사 희랍: 정전기현상과 자석 발견 1820 Hans Christian Oersted: 전류와 자기현상의 연관 발견 19세기 Michael Faraday: 전자기 유도현상 발견 James Clerk Maxwell: 전자기이론 확립 전자기학의 기본방정식 : 4개의 맥스웰 방정식 방정식의 이름 방정식과 물리적 내용 전기장 에 관한 가우스 법칙 S E⋅dA = q ε 0 전하는 주위에 전기장을 만든다. 자기장 에 관한 가우스 법칙 S B⋅dA = 0 자기장 만드는 점원(point source)은 없다. 파라데이 유도법칙 C E⋅ds = - d Φ B dt 자기장이 시간으로 변하면 전기장이 생긴다. 암페어-맥스웰 법칙 C B⋅ds = μ 0 ε 0 d Φ E dt + μ 0 i 전류가 흐르거나 전기장이 시간으로 변하면 자기장이 생긴다.
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22-2 전하 종류 두 종류가 있으며, (+)전하와 (-)전하로 나타낸다.
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