Flip-Flops/Counters MCQs
Practice free Flip-Flops/Counters multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 94 questions — no login required.
Question 28easy
In a 555 timer, three 5 k resistors provide a trigger level of ________.
Question 29easy
The circuit that is primarily responsible for certain flip-flops to be designated as edge-triggered is the:
Question 30easy
With four J-K flip-flops wired as an asynchronous counter, the first output change of divider #4 indicates a count of how many input clock pulses?
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Question 31easy
What is the significance of the J and K terminals on the J-K flip-flop?
Question 32easy
Determine the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz.
Question 33easy
The phenomenon of interpreting unwanted signals on J and K while Cp (clock pulse) is HIGH is called ________.
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Question 34easy
The toggle condition in a master-slave J-K flip-flop means that Q and Q will switch to their ________ state(s) at the ________.
Question 35easy
An RC circuit used in a nonretriggerable 74121 one-shot has an REXT of 49 k and a CEXT of 0.2 F. The pulse width (tW) is approximately ________.
Question 36easy
A 555 operating as a monostable multivibrator has a C1 = 0.01 F. Determine R1 for a pulse width of 2 ms.