You purchase an LED with a forward bias voltage of 2V. The manufacturer claims the most efficient current for good brightness and low power loss is 30mA. If using a 5V power supply, what resistance value should you put in series with the diode to achieve the recommended current?
A. 5/30 ?
B. 50/3 ?
C. 100 ?
D. 150 ?
E. 500/3 ?
Answer: C
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