Digital questions - 4

16.	A settable flip-flop's normal starting state when power is first applied to a circuit is always the ________ state.
	A. reset B. set C. toggle D. dual

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17.	In the automatic reset circuit for a flip-flop, how long does it take the capacitor to completely charge?
	A. 1 time constant (RC) B. 2 time constants (RC) C. 5 time constants (RC) D. 10 time constants (RC)

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18.	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

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19.	When the inputs to a flip-flop are changing at the same time that the active trigger edge of the input clock is making its transition, this condition is called:
	A. racing B. toggling C. slave loading D. pulse timing

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20.	Is the propagation delay from the clock to the output for the 7476 the same as the delay from the set or reset to the output?
	A. yes B. no