Mathematics · Electric Circuits
A 4.5 V microprocessor is connected to an electrical circuit. The circuit has a resistor in series with an LED. The turn-on voltage of the LED is 2.3 V. Assuming that the specified maximum operating current for the circuit is 10 mA, what should be the effective resistance of the resistor?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1120 Ω
- 2220 Ω✓
- 3240 Ω
- 4130 Ω
Correct answer
220 Ω
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