The output of a standard TTL NAND gate is used to pull an LED indicator LOW. The LED is in series with a 470- resistor. What is the current in the circuit when the LED is on?

The output of a standard TTL NAND gate is used to pull an LED indicato

1.	The output of a standard TTL NAND gate is used to pull an LED indicator LOW. The LED is in series with a 470- resistor. What is the current in the circuit when the LED is on?
A.	7.02 mA
B.	8.51 mA
C.	10.63 mA
D.	5.32 mA
Answer» B. 8.51 mA