Understanding JK Flip-Flop Circuits

The video tutorial explains the operation of the JK flip-flop circuit, starting with the construction of an SR latch using NAND gates. It then details how to build the JK flip-flop by adding additional components. The tutorial covers the truth table for NAND gates and explains the circuit's operation, including how the JK flip-flop toggles between states when specific inputs are applied.

What is the first step in constructing a JK flip-flop circuit?

• Set the initial values of Q and Q Bar

• Connect the clock input first

• Build an SR latch circuit using NAND gates

• Draw the JK flip-flop directly

In a two-input NAND gate, when is the output zero?

• When one input is one

• When one input is zero

• When both inputs are one

• When both inputs are zero

What happens to the output of a JK flip-flop when the clock input is inactive?

• The output changes randomly

• The output remains the same

• The output resets to zero

• The output toggles continuously

What is the role of the clock input in a JK flip-flop circuit?

• To reset the circuit to initial values

• To deactivate the J and K inputs

• To toggle the output continuously

• To activate the circuit for state changes

What is the effect of pressing the J button with an active clock input?

• It resets Q to zero

• It deactivates the clock input

• It sets Q to one

• It toggles Q and Q Bar

How does the JK flip-flop circuit behave when the K button is pressed after J?

• It resets Q to zero

• It sets Q to one

• It toggles Q and Q Bar

• It deactivates the clock input

What happens to the JK flip-flop circuit when J is pressed twice consecutively?

• The output sets to one

• The output resets to zero

• The output remains unchanged

• The output toggles

What is the result of pressing K after J in a JK flip-flop circuit?

• Q remains unchanged

• Q toggles continuously

• Q is reset to zero

• Q is set to one

When both J and K are pressed simultaneously with an active clock input, what happens?

• The circuit becomes inactive

• The circuit toggles between states

• The circuit enters a state of memory

• The circuit resets to initial values

What is the significance of the toggle state in a JK flip-flop circuit?

• It means the circuit is faulty

• It indicates a memory state

• It represents a switch in action

• It shows the circuit is inactive