옴
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정의
1 V의 전위차가 1 A의 전류를 흐르게 할 때 두 점 사이의 저항으로 정의되는 SI 전기 저항 단위(1 Ω = 1 V/A).
설명
Named after Georg Simon Ohm, who formulated Ohm's law (V = IR). A standard LED circuit resistor is typically 220–470 Ω; a human body's resistance ranges from 1,000 Ω (wet skin) to 100,000 Ω (dry skin). Resistors in series add directly: two 100 Ω resistors in series equal 200 Ω.
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