Engineering, 31.10.2020 14:00, silvajimena74

I need to drop 10 V to feed an LED from a 12 V power supply. The resistor value is 490 Ω. How much of my battery power will be wasted in the resistor?

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I need to drop 10 V to feed an LED from a 12 V power supply. The resistor value is 490 Ω. How much o...